The preparation method of three component parallel composite fibersTechnical field
The invention belongs to composite fibre preparation technical fields, and in particular to a kind of preparation of three component parallel composite fibersMethod.
Background technique
Two-component chemical fiber such as parallel type is washed, bright and beautiful bicomponent fibre has produced for many years, technically substantially not in ChinaIt can be seen in there are obstacle and in disclosed Chinese patent literature, such as a kind of compound fibre of core shift bicomponent of CN101109110A(Dimension and preparation method thereof), using PPS and PET, PBT and PA6 or use PBT and PA66；CN101798714B(bi-component is multipleCondensating fiber and preparation method thereof), using PET and PA；CN104195673B(bi-component polyester composite fibre direct fabrics method andSystem), using bi-component PET.
Since aforementioned two-component chemical fiber has good three-dimensional crimp performance, thus obtained extensively in needle field of textilesGeneral application.But since the crimp radius of bicomponent composite fibre is still relatively large, thus the fibre within the scope of certain lengthDimension curling quantity is restricted.Three component composite fibres are because crimp radius is significantly less than bicomponent composite fibre, thus certainFiber crimp quantity in length range is significantly higher than bicomponent composite fibre, and elasticity and flexibility can not make the compound fibre of bi-componentDimension matches in excellence or beauty with it.But different fibers must be taken into account during preparing bicomponent composite fibre and three component composite fibresCompatibility between raw material, and the more consistency problems of component are more prominent, and solution difficulty is also corresponding bigger, otherwise will affect fibreTie up quality.In particular, if compatibility is bad, after the melt of each component is compound, in the longitudinal direction of single fiberIt can generate and bifurcation occur because can not effectively bond between different melt, in rear road drawing-off or other textile process mistakesLousiness, breakage phenomena are generated in journey, this phenomenon is still prominent for parallel composite fiber outside spinneret orifice.
In addition, as is known in the industry, filament spinning component is the important component of complete spinning equipment, and can be special in disclosed ChinaBe seen in sharp document, as CN103668499A(two-component wind spinning head), a kind of compound spinneret of two-component of CN206467344U(Board group part), the spinneret structure of CN204509525U(polylactic acid bi-component composite fiber single spraying wire hole filament spinning component) andCN103668498A(two-component is interlocked spinning head), etc..Aforementioned CN103668499A is that the fiber of two kinds of different materials is made to existTangle up is glued by certain viscosity before solidifying；Aforementioned CN206467344U is to be bonded to each other two-component materials；It is aforementionedWhat CN20450925U was applicable in is the spinning of two kinds of identical materials (polylactic acid)；Aforementioned CN103668498A can make two kinds of materialsSpun filament is interweaved but non-intersecting and form a branch of tow after ejection.
It is not limited to patent exemplified above and is not able to satisfy wanting of being evenly spaced on the fiber of two kinds of different materialsIt asks and had not both provided directly or indirectly corresponding technical inspiration.
By the publication No. that the applicant proposes be CN108707987A, entitled " filament spinning components of bicomponent fibers " solveDetermined the problem of fiber of two kinds of different materials is evenly spaced on and faithfully fulfilled the 0021st section of specification rememberThe technical effect of load.
By the reading to aforementioned CN108707987A, for objective, have for three component filament spinning components of design certainInstructive, but since CN108707987A is for special-purpose such as pipe tobacco, thus what it pursued is twoKind fiber such as acid fiber by polylactic and the distributing homogeneity of polypropylene fibre between the two, then in the structural body of composite spining moduleIt opens up the first spinneret orifice (patent claims " spinneret orifice I ") and the second spinneret orifice every one state with one on the spinneret of system (patent claims" spinneret orifice II "), the first spinneret orifice and the first fused mass flow guiding of distribution plate hole phase on the melt distribution plate being located above spinneretIt is logical, the second spinneret orifice equally with the second fused mass flow guiding of distribution plate hole phase on the aforementioned melt distribution plate that is located above spinneretLogical, the first, second spinneret orifice is in a distribution every one always, and obtained tow is the uniform silk union of two kinds of raw materials,For each single acid fiber by polylactic also polypropylene fibre, relationship that the two is not bonded to each other (seeThe 0040th section of the specification of CN108707987A).However, what is pursued by aforementioned three components parallel composite fiber is to makeEach fiber includes the composite fibre being made of three kinds of different materials to combine togather, for example, by aforementioned PLA,PTT and PET three is mutually bonded into one, or claim stick to each other, due to this tricomponent fibre can be not only used forOther fiber blend can also be used as filler, moreover it is possible to resultant yarn alone, thus compared with the favor by people.
Based on the above-mentioned evaluation to CN108707987A it is found that preparing aforementioned three components parallel composite fiber to meetRequirement, then substantial improvement must be made to the structure of spinneret.
Although equally visible all related to the processing spinneret of three component composite fibres in disclosed Chinese patent literatureTechnical information, as CN202610410U recommendation have " spinneret used in three-component composite fiber with special-shaped cross section " andCN205803643U is provided with " be used to prepare three component profiled-cross-section composite hollows and glue fiber ", etc., but for being intended to setThe spinneret of the structural system for the three component parallel composite fiber filament spinning components that meter applicant is mentioned above does not have enlightenmentMeaning.Because if spinneret plate structure is lost rationally, then being difficult to obtain crimp radius as described above small, elastic and softSoft three excellent component parallel composite fibers, technical solution described below generate in this background.
Summary of the invention
Task of the invention lies in provide it is a kind of facilitate ensure fibrous raw material between compatibility, be conducive to make three kinds notIn the spinneret orifice of spinneret after the spinneret for passing through respective path arrival composite fiber spinning component with the melt of spinning materialOutside outer realization hole it is compound and be able to be reduced significantly fiber crimp radius and significantly enhance elasticity and flexibility, have it is good convenient for embodyingGood degradability and being able to promotes environment protecting and being beneficial to, and to embody ideal antibacterial pro-skin perspiration wicking and be able to ensure and useWhen comfort three component parallel composite fibers preparation method.
The task of the present invention is in this way to complete, a kind of preparation method of three components parallel composite fiber, including withLower step:
A) raw material preparation, by PLA slice, PTT slice and PBT slice be separately dried, obtain PLA dried feed, PTT dried feed andPBT dried feed, wherein the volume ratio of the PLA slice, PTT slice and PBT slice three is 1: 0.8-1: 0.8-1, describedPLA slice in, the furandicarboxylic acid containing 15-25wt%；The PTT slice is by propylene glycol, terephthalic acid (TPA) and furansDioctyl phthalate three is 1: 0.05-0.5: 0.05-0.5 composition in molar ratio；The PBT slice is by butanediol, terephthaldehydeAcid and furandicarboxylic acid are 1: 0.05-0.5: 0.05-0.5 composition in molar ratio.
B spinning melt) is prepared, it will be by PLA dried feed, PTT dried feed and PBT dried feed that step A) is obtained respectively throughOne screw extruder I, the second screw extruder II and III melting extrusion of third screw extruder and defeated through melt pipe respectivelyIt send and obtains the PLA spinning melt as the first component, the PTT spinning melt as the second component to respective metering pump-meteredWith the PBT spinning melt as third component；
C finished product) is prepared, the PLA spinning melt as the first component, the PTT as the second component that will be obtained by step B) are spunSilk melt and the composite fiber spinning pack spin that manifold is introduced as the PBT spinning melt of third component, then successively through blowingAir cooling oils, pre- network, stretching, network and is wound into cylinder again, obtains three component parallel composite fibers；
Wherein, step C) described in composite fiber spinning component include: a cylinder；It is successively set on the cylinder of cylinder from bottom to topAn endoceliac spinneret, a melt distribution plate, a fused mass flow guiding disk, a melt-filtered mechanism and a melt import disk；One lockTight nut ring, the locking screw female ring are threadedly engaged in the cylinder chamber with the cavity wall top of cylinder chamber, and by the locking screwThe lower part that female ring imports disk to the melt limits, and the top of melt importing disk is stretched over top and the spy of locking screw female ringThe upper plane of the cylinder, the spinneret are supported on the lower part of the cylinder chamber out, in side of the spinneret underSpinneret compounding flux extrusion cavities are offered with space state, and offer quantity and spinneret towards upper side in spinneretThe quantity of compounding flux extrusion cavities equal the first melt of spinneret leadout hole, spinneret the second melt leadout hole and spinneretThree melt leadout holes, spinneret the first, second melt leadout hole and spinneret third melt leadout hole are from spinneret directionOn side extend to the spinneret compounding flux extrusion cavities, wherein the spinneret compounding flux extrusion cavities described in eachBe assigned spinneret the first, second melt leadout hole and a spinneret third melt leadout hole, by spinneret first,Second, third melt leadout hole is respectively by the PLA spinning melt for first component distributed by the melt distribution plate, secondThe PTT spinning melt of component and the PBT spinning melt of third component converge to the spinneret compounding flux simultaneously and squeeze hole simultaneouslyIt is compound that hole extrusion is squeezed by spinneret compounding flux.
In a specific embodiment of the invention, step A) described in the temperature of PLA chip drying be 80-110DEG C, drying time 6-12h, the dry temperature of the PTT slice is 90-120 DEG C, and drying time 6-12h, the PBT is cutPiece drying temperature is 100-130 DEG C, drying time 6-12h；Step B) described in the first screw extruder I to the PLAThe screw rod melting extrusion temperature of dried feed is 200-250 DEG C, screw rod of second screw extruder II to the PTT dried feedMelting extrusion temperature is 240-290 DEG C, screw rod melting extrusion temperature of the third screw extruder III to the PBT dried feedIt is 235-280 DEG C, pressure is 8-10MPa before the pump of the metering pump of the PLA melt-stoichiometry, and pressure is 7-9MPa after pump；To institutePressure is 8-10MPa before stating the pump of the metering pump of PTT melt-stoichiometry, and pressure is 7-9MPa after pump；To the PBT melt-stoichiometryPressure is 8-11MPa before the pump of metering pump, and pressure is 7-9MPa after pump.
In another specific embodiment of the invention, the inherent viscosity of the PLA is 0.6-1.2dL/g；The PTTInherent viscosity be 0.65-1.4 dL/g；The inherent viscosity of the PBT is 0.75-1.5 dL/g.
In another specific embodiment of the invention, step C) described in the cooling wind velocity of quenching be0.3-0.6m/min, cooling wind temperature be 15-25 DEG C, the oil applying rate to oil be 0.3-0.8%, the pre- network be make fromThe spinneret orifice of the spinneret be combined into after squeezing out fine fiber by way of setting spinneret draft roller be used to oil to fiberUpper oil nozzle between Network device form 3-6/m nexus, described stretch includes that the first draft area stretches and the second draft areaIt stretches, the draw ratio that the first draft area stretches is 1.1-1.3 times, and upper drawing-off disk temperature is 60-90 DEG C, and the second draft area stretchesMultiple be 3-5 times, lower drawing-off disk temperature be 95-130 DEG C；The network again be make to complete the fibre bundle of stretching by way ofIt is set to lower hot plate and forms 60-120/m nexus after winding the Network device between friction roller；The silk cylinder for being wound into cylinderWinding relaxation is than being 0.7-0.9: 1；The crimp percent of the three components parallel composite fiber is 18-70%, elongation at break is30-130%, breaking strength 2.6-4cn/dtex, elastic recovery rate >=80-98% and monofilament linear density are 2-7dtex.
In another specific embodiment of the invention, the melt imports side and the melt mistake of the disk underThe top scarf of filter structure is imported on disk to offer to penetrate through from the upper surface that melt imports disk to the one of lower surface and be led in the meltEnter the first melt of disk entrance hole, importing disk the second melt guide hole and one imports disk third melt guide hole, wherein import disk firstMelt entrance hole is located at melt and imports the central location of disk, and imports disk the second melt entrance hole and import disk third melt and leadEnter hole and correspond to respectively with symmetry status to import the two sides of the first melt of disk guide hole and inclined open up；The filter mechanism packetInclude cylinder base disk, outer cartridge filter and interior cartridge filter, the lower end of outer cartridge filter and interior cartridge filter be integrally formed with cylinder base disk structure andIt leans out a side surface of the cylinder base disk under and is supported on the fused mass flow guiding disk towards upper side, wherein interior cartridge filter positionIn in outer cartridge filter, the interior filtering barrel chamber of interior cartridge filter is configured to the first melt filtration chamber, on the top of the first melt filtration chamberPortion is equipped with the first melt filtration chamber top sealing plate, offers one in the central location of the first melt filtration chamber top sealing plate and leads with describedEnter the first melt filtration chamber top sealing plate through-hole that disk the first melt guide hole is corresponding and communicates, the inner wall of outer cartridge filter and interior mistakeSpace between the outer wall of filter cylinder is configured to the second melt filtration chamber, and between the outer wall of outer cartridge filter and the inner wall of the cylinderSpace be configured to third melt filtration chamber, which communicates with the importing disk third melt guide hole,The top of the second melt filtration chamber is provided with one second melt filtration chamber top sealing plate, in the second melt filtration chamber top sealing plateAbove and corresponding to the position for importing the second melt of disk introduction hole offering one and importing the second melt of disk entrance hole phaseThe second logical melt filtration chamber top sealing plate through-hole on cylinder base disk and is corresponding to the interregional of the first melt filtration chamberSeparate be equipped with the first melt of cylinder base disk fairlead, cylinder base disk the first melt fairlead with by the interior cartridge filter lower end andAnd the first melt discharging chamber for being located at side of the cylinder base disk under communicates, it is on cylinder base disk and molten corresponding to described secondThe region of body filter chamber, which is spaced apart, is equipped with the second melt of cylinder base disk fairlead, cylinder base disk the second melt fairlead and is formed in instituteIt states between the lower end of inside and outside cartridge filter and the second melt discharging chamber for being similarly positioned in side of the cylinder base disk under communicates,It is spaced apart on cylinder base disk and in the region for corresponding to the third melt filtration chamber and is equipped with cylinder base disk third melt fairlead, it shouldCylinder base disk third melt fairlead and the third melt chamber being formed between the lower end of outer cartridge filter and the cavity wall of the cylinder chamberIt communicates, the fused mass flow guiding disk is stacked on melt distribution plate, is offered on the fused mass flow guiding disk from the upper of fused mass flow guiding diskSurface penetrates through the first fused mass flow guiding of flow guiding disc hole, a pair of of flow guiding disc the second fused mass flow guiding hole and a pair of of flow guiding disc to lower surfaceThird fused mass flow guiding hole, flow guiding disc the first fused mass flow guiding hole be located at the center of fused mass flow guiding disk and with first meltDischarging chamber is corresponding and communicates, and a pair of of flow guiding disc the second fused mass flow guiding hole and a pair of of flow guiding disc third fused mass flow guiding hole open upIt is described in the edge of fused mass flow guiding disk and corresponding with second, third described melt discharging chamber respectively and communicateMelt distribution plate is stacked on the spinneret, and first diversion trench of melt distribution plate, one are offered on the melt distribution plateTo the second diversion trench of melt distribution plate and a pair of of melt distribution plate third diversion trench, the first diversion trench of melt distribution plate is provided with moltenBody distribution plate is led towards upper side and corresponding with flow guiding disc the first fused mass flow guiding hole in the melt distribution plate firstThe bottom interval of chute offers one group of first diversion trench the first melt fairlead, group the first diversion trench the first melt fairleadThe the first melt annular groove for being provided with side of the melt distribution plate under with annular shape communicates, wherein each first meltFairlead is corresponding with a first melt annular groove, and a pair of of the second diversion trench of melt distribution plate and a pair of of melt distribution plate third are ledChute the position for corresponding respectively to second, third melt discharging chamber be provided with melt distribution plate towards upper sideEdge, wherein respectively offer one second the second melt of diversion trench at the both ends of a pair of of the second diversion trench of melt distribution plate and drawPortal, the second diversion trench the second melt fairlead and circular the second melt for being provided with side of the melt distribution plate underAnnular groove communicates, and respectively offers a third diversion trench third melt at the both ends of a pair of of melt distribution plate third diversion trench and drawsHole, the third diversion trench third melt fairlead and the circular third melt ring for being provided with side of the melt distribution plate underShape slot communicates, and spinneret the first melt leadout hole is communicated with the first melt annular groove, and the spinneret second is moltenBody leadout hole is communicated with the second melt annular groove, and the spinneret the second melt leadout hole and third melt annularSlot communicates.
Of the invention there are one in specific embodiment, constituting in the lower inner wall of the cylinder chamber of the cylinder hasOne spinneret supports mount, a bearing mount sealing ring is provided in spinneret bearing mount, in the cylinder of cylinderConstituting in the upper inside wall of body cavity has locking screw female ring to cooperate internal screw thread, in side under of the spinneret and around sprayThe surrounding composition of filament plate has a spinneret supporting cavity, which matches with the bearing mount sealing ring,There are locking screw female ring external screw thread, the locking screw on the outer wall of the locking screw female ring and around the surrounding of locking screw female ring compositionFemale ring external screw thread is threadedly engaged with the locking screw female ring cooperation internal screw thread；In the spinneret towards the edge of upper sidePosition offers a melt distribution plate dowel hole, and in side of the melt distribution plate under and is corresponding to meltThe position of distribution plate dowel hole, which is constituted, a melt distribution plate positioning pin, which is inserted into the melt pointWith in disk dowel hole；It is offered towards a upper side surface with space state for by locking nut in the locking screw female ringThe manual operating groove of the hardware tool that ring is screwed or unscrewed；The lower part of disk is imported in the melt and imports the four of disk around meltAll constitute has a melt to import disk restriction flange, is provided with a melt on melt importing disk restriction flange and imports disk limitDetermine flange sealing ring, the lower surface of the locking screw female ring and the melt import disk and limit the sealing cooperation of flange sealing ring.
In a still more specific embodiment of the invention, a melt is extended on the top that the melt imports disk to leadEnter disk connector and a melt imports the outer cofferdam of disk and a melt imports disk center cofferdam, which imports the outer cofferdam of disk and be located atMelt imports in disk connector, and melt imports disk center cofferdam and is located in the outer cofferdam of melt importing disk, and melt imports disk centerThe space of the middle section in cofferdam is configured to the first melt that is corresponding with importing first melting hole of disk and communicating and feedsChamber, the space that melt imports the inner wall in the outer cofferdam of disk and melt imports between the outer wall in disk center cofferdam are configured to and the importingThe second melt that disk the second melt guide hole communicates feeds chamber, and melt imports the inner wall of disk connector and melt imports the outer cofferdam of diskSpace between outer wall is configured to feed chamber with the third melt that the importing disk third melt guide hole communicates, and leads in meltEnter to be provided with melt on the inner wall of disk connector and import connector inner thread, wherein is fed in the third melt intracavitary, moltenBody imports in the outer cofferdam of disk and melt imports in disk center cofferdam and is each provided with a rubber annular sealing ring.
In a specific embodiment in turn of the invention, the bottom of disk is imported in the melt and is corresponding to instituteThe position for stating the lower end of importing the first melt of disk guide hole is embedded with importing disk the first melt guide hole sealing ring, and is corresponding to instituteThe position for stating the lower end of importing the second melt of disk guide hole is embedded with importing disk the second melt guide hole sealing ring, by importing disk firstMelt guide hole sealing ring will import disk the first melt guide hole and border on position with the first melt filtration chamber top sealing plate through-holeSurrounding form sealing, and disk the second melt guide hole will be imported by importing disk the second melt guide hole sealing ring and melted with described secondThe surrounding for bordering on position of body filter chamber top sealing plate through-hole forms sealing；The bottom of disk is imported in melt and corresponding to describedThe position of the upper end of outer cartridge filter offers an outer cartridge filter embeded slot, and in the position for the upper end for corresponding to the interior cartridge filterOffer cartridge filter embeded slot in one, the upper end scarf of outer cartridge filter embeded slot and outer cartridge filter, and interior cartridge filter embeded slot withThe upper end scarf of interior cartridge filter；An importing disk positioning pin is offered towards upper side in the second melt filtration chamber top sealing plateHole, and import the bottom of disk in melt and be fixed with an importing disk positioning pin corresponding to the position for importing disk dowel hole,The importing disk positioning pin is matched with disk dowel hole is imported, and the importing disk dowel hole is blind hole.
The melt-filtered mechanism further includes once filtering in yet a further embodiment of the present inventionDevice and a secondary filter, a filter device include the first, second prefiltration net and third prefiltration net, the first first mistakeThe top of first melt chamber is arranged in strainer, and the top of the second melt filtration chamber is arranged in the second prefiltration net, andThe top of the third melt filtration chamber is arranged in third prefiltration net, and secondary filter includes interior, domestic and abroad filter screen, interiorThe bottom of the first melt filtration chamber is arranged in filter screen, and the bottom of the second melt filtration chamber is arranged in middle filter screen,And the bottom of the third melt filtration chamber is arranged in outer net.
Of the invention again and then in a specific embodiment, spinneret the first melt leadout hole and spinneretThe direction that the lower end of third melt leadout hole is towards the spinneret compounding flux extrusion cavities is inclined, the spinneretTwo melt leadout holes are straight hole；Spinneret the first, second melt leadout hole and spinneret third melt leadout holeInside the direction of the upper surface of the spinneret towards the spinneret compounding flux extrusion cavities is gradually reduced and by the spray without leaveFilament plate compounding flux extrusion cavities annex the melt outlet of spinneret the first, second, third melt leadout hole.
Technical solution provided by the invention has the technical effect that due to being sliced in PLA, is equal in PTT slice and PBT sliceContaining furandicarboxylic acid, thus the compatibility that PLA slice, PTT slice and PBT can be made to be sliced between three kinds of raw materials reaches 99%More than, help to ensure quality of three components from Curl fiber, is not in bifurcated, lousiness and breakage phenomena；Due to phaseEach spinneret compounding flux extrusion cavities for being provided with the bottom of spinneret are assigned first, second melt of spinneretLeadout hole and a spinneret third melt leadout hole, thus PLA spinning melt, the PTT of the first, second, third component can be madeSpinning melt and PBT spinning melt pass through respective path and arrive at the spinneret compounding flux extrusion cavities of spinneret at the same timePlace converges and squeezes out, compound by spinneret compounding flux extrusion cavities extrusion with bulking effect, to be able to be reduced significantly into fibreThe crimp radius of three component parallel composite fibers afterwards and significantly enhanced elasticity and flexibility；Due to three component parallel typesCrispation number of the composite fibre in every meter of length range can increase 30-40% than bicomponent composite fibre, thus can embody ultimate attainmentElasticity and flexibility, satisfaction dye the requirement of yarn etc. with other fiber blends, as filler and certainly；Due to overall structure phaseTo terse, thus production can be not only facilitated, but also can be easy to use and safeguard and emerge from relatively cheap property；Due to reasonably selectingThe volume ratio of PLA slice, PTT slice and PBT slice is 1: 0.8-1: 0.8-1, thus both has good degradabilityAnd emerge from the close friend to environment, and with excellent antibacterial skin-friendly and it is perspiration wicking and be able to production defend material, infant withAnd old personal dress ornament.
Detailed description of the invention
Fig. 1 is the example structure figure of composite fiber spinning component used in the method for the present invention.
Fig. 2 is the cross-sectional view of Fig. 1.
Fig. 3 is the signal of one group of first, second, third melt leadout hole on the spinneret of Fig. 1 and spinneret shown in Fig. 2Figure.
Fig. 4 is the A-O-A cross-sectional view of Fig. 3.
Fig. 5 is the partial sectional view of Fig. 1 and spinneret shown in Fig. 2.
Fig. 6 is the bottom view of Fig. 1 and melt distribution plate shown in Fig. 2.
Fig. 7 is the bottom view of Fig. 1 and spinneret shown in Fig. 2.
Fig. 8 is the cross-sectional view of three component parallel composite fibers of the method for the present invention preparation.
Specific embodiment
In order to which technical spirit and beneficial effect of the invention is more clearly understood, applicant is below with embodimentMode elaborate, but be not limitation to the present invention program, any structure according to the present invention to the description of embodimentThink made only formal but not substantive equivalent transformation and is regarded as technical solution of the present invention scope.
For attached drawing of the invention, the concept of all directionality for being related to upper, lower, left, right, front and rear or directionalityIt is all that thus cannot be understood as to technical solution provided by the invention on the basis of Fig. 1 and location status shown in Fig. 2Be particularly limited to.
Embodiment 1:
PLA slice, PTT slice and PBT slice are dried respectively, obtain PLA(i.e. PLA chip drying by A) raw material preparationIt is material, the same below), PTT(, that is, PTT slice dried feed, it is the same below) and PBT(, that is, PBT chip drying material, it is the same below) dried feed,Wherein, the drying temperature of PLA slice is 110 DEG C, and the drying time of PLA slice is 6h, and the drying temperature of PTT slice is 120DEG C, the drying time of PTT slice is 6h, and the drying temperature of PBT slice is 100 DEG C, and the drying time of PBT slice is 12h, describedThe volume ratio of PLA slice, PTT slice and PBT slice three is 1: 0.8: 0.9, in this step, is contained in the PLA sliceHave a furandicarboxylic acid of 25wt%, the PTT slice be by propylene glycol, terephthalic acid (TPA) and furandicarboxylic acid three in molar ratioIt is constituted for 1: 0.5: 0.05；It is 1 that the PBT slice is by butanediol, terephthalic acid (TPA) and furandicarboxylic acid in molar ratio:0.5: 0.05 composition.
B spinning melt) is prepared, it will be by PLA dried feed, PTT dried feed and PBT dried feed that step A) is obtained respectively throughOne screw extruder I, the second screw extruder II and III melting extrusion of third screw extruder and respectively through respective meltPipeline obtains the PLA spinning melt as the first component, the PTT as the second component is spun to respective metering pump-meteredSilk melt and the PBT spinning melt as third component, in this step, first screw extruder I are dry to the PLAThe screw rod melting extrusion temperature of dry material is 225 DEG C, and second screw extruder II melts the screw rod of the PTT dried feed and squeezesTemperature is 290 DEG C out, and the third screw extruder III is 260 DEG C to the screw rod melting extrusion temperature of the PBT dried feed, rightPressure is 9MPa before the pump of the metering pump of the PLA melt-stoichiometry, and pressure is 9MPa after pump, to the meter of the PTT melt-stoichiometryPressure is 8MPa before measuring the pump of pump, and pressure is 7MPa after pump, is to pressure before the pump of the metering pump of the PBT melt-stoichiometry10MPa, pressure is 7MPa after pump, and the inherent viscosity of the PLA is 0.9 dL/g, and the inherent viscosity of the PTT is 0.65dL/g,The inherent viscosity of the PBT is 1.1 dL/g；
C finished product) is prepared, the PLA spinning melt as the first component, the PTT as the second component that will be obtained by step B) are spunSilk melt and the composite fiber spinning pack spin that manifold is introduced as the PBT spinning melt of third component, then successively through blowingAir cooling oils, pre- network, stretching, network and is wound into cylinder again, obtain by Fig. 8 cross-sectional shape illustrated three components simultaneouslyColumn type composite fibre 9, the cooling wind velocity of quenching described in this step are 0.45m/min, and cooling wind temperature is 20 DEG C,The oil applying rate to oil is 0.3%, and the pre- network is to make to be combined into fine fibre after squeezing out from the spinneret orifice of the spinneretIt ties up and forms 6/m nexus by way of the Network device that spinneret draft roller is arranged between upper oil nozzle for oiling to fiber,Described stretch includes that the first draft area is stretched with the stretching of the second draft area, and the draw ratio that the first draft area stretches is 1.3 times, onDrawing-off disk temperature is 60 DEG C, and the multiple that the second draft area stretches is 5 times, and lower drawing-off disk temperature is 130 DEG C；The network again is to makeThe fibre bundle for completing stretching is forming 120/m net after the Network device being set between lower hot plate and winding friction rollerNetwork point；The winding relaxation for being wound into cylinder is than being 0.7: 1, that is, when the linear velocity for the tow for descending hot plate to export is 1m/s, windingThe winch spool linear velocity of cylinder is 0.7m/s, and the crimp percent of the three component parallel composite fibers is 18%, elongation at break is130%, breaking strength 3.3cn/dtex, elastic recovery rate (returning extensive rate) >=95% and monofilament linear density are 2dtex.
Referring to Figure 1 and Fig. 2, above-mentioned steps C) described in composite fiber spinning component structure it is as follows: show oneColumnar cylinder；Show the spinneret for setting gradually or being sequentially stacked from bottom to top in the cylinder chamber 11 of cylinder 12, a melt distribution plate 3, a fused mass flow guiding disk 4, a melt-filtered mechanism 5 and a melt import disk 6；Show a locking nutRing 7, the locking screw female ring 7 are threadedly engaged in aforementioned cylinder chamber 11 with the cavity wall top of cylinder chamber 11, and by the locking screwThe lower part that female ring 7 imports disk 6 to aforementioned melt limits, and the top that melt imports disk 6 is stretched over the top of locking screw female ring 7 simultaneouslyAnd the upper plane of aforementioned cylinder 1 is leant out, spinneret 2 above-mentioned is supported on the lower part of aforementioned cylinder chamber 11, in 2 direction of spinneretUnder side offer spinneret compounding flux extrusion cavities 24 in the form of circle and with space state, and in spinneret2 offer the quantity spinneret first melt export equal with the quantity of spinneret compounding flux extrusion cavities 24 towards upper sideHole 21, the second melt of spinneret leadout hole 22 and spinneret third melt leadout hole 23, first, second melt of spinneret exportIt is compound molten that hole 21,22 and spinneret third melt leadout hole 23 from spinneret 2 towards upper side extend to aforementioned spinneretBody extrusion cavities 24, wherein it is molten that each spinneret compounding flux extrusion cavities 24 above-mentioned is assigned a spinneret first, secondBody leadout hole 21,22 and a spinneret third melt leadout hole 23, by spinneret the first, second, third melt leadout hole21,22,23 respectively by by aforementioned melt distribution plate 3 distribute it is aforementioned as the PLA spinning melt of the first component, as second groupThe PTT spinning melt divided and the PBT spinning melt as third component converge to aforementioned spinneret compounding flux simultaneously and squeeze hole24 and by spinneret compounding flux squeeze hole 24 squeeze out it is compound.
Continue to see Fig. 1 and Fig. 2, it is embedding that aforementioned melt imports side of the disk 6 under and the top of aforementioned melt-filtered mechanism 5Match, imports on disk 6 one for offering and penetrating through from the upper surface that melt imports disk 6 to lower surface in the melt and import the first melt of diskEntrance hole 61, one imports the second melt of disk guide hole 62 and one and imports disk third melt guide hole 63, wherein imports the first melt of disk and leadsEnter the central location that hole 61 is located at melt importing disk 6, and imports the second melt of disk entrance hole 62 and import disk third melt and leadEnter hole 63 and correspond to respectively with symmetry status to import the two sides of the first melt of disk guide hole 61 and inclined open up；Foregoing filtration machineStructure 5 includes cylinder base disk 51, outer cartridge filter 52 and interior cartridge filter 53, the lower end and cylinder base disk 51 of outer cartridge filter 52 and interior cartridge filter 53It is integrally formed structure and leans out a side surface of the cylinder base disk 51 under and be supported on aforementioned fused mass flow guiding disk 4 towards upper oneSide, wherein interior cartridge filter 53 is located in outer cartridge filter 52, and the interior filtering barrel chamber of interior cartridge filter 53 is configured to the first melt filtration chamber531, it is equipped with the first melt filtration chamber top sealing plate 5311 at the top of the first melt filtration chamber 531, in first melt filtrationThe central location of chamber top sealing plate 5311 offer one with it is aforementioned importing disk the first melt guide hole 61 it is corresponding and communicate firstMelt filtration chamber top sealing plate through-hole 53111, the space between the inner wall of outer cartridge filter 52 and the outer wall of interior cartridge filter 53 is configured toSecond melt filtration chamber 521, and the space between the outer wall of outer cartridge filter 52 and the inner wall of aforementioned cylinder 1 is configured to third meltFilter chamber 522, which communicates with importing disk third melt guide hole 63 above-mentioned, in aforementioned second meltThe top of filter chamber 521 is provided with one second melt filtration chamber top sealing plate 5211, in the second melt filtration chamber top sealing plate 5211Above and corresponding to the aforementioned position for importing the second melt of disk introduction hole 62 offering one and importing the second melt of disk entrance hole62 the second melt filtration chamber top sealing plate through-holes 52111 communicated on cylinder base disk 51 and are corresponding to aforementioned first melt mistakeThe region of filter chamber 531 is spaced apart in the central region of cylinder base disk 51 and is equipped with the first melt of cylinder base disk fairlead 511, the cylinder base diskThe first melt fairlead 511 and lower end by aforementioned interior cartridge filter 53 and positioned at side of the cylinder base disk 51 under firstMelt discharging chamber 532 communicates, i.e. in cylinder base on cylinder base disk 51 and in the region for corresponding to aforementioned second melt filtration chamber 521The peripheral region of the first melt of disk fairlead 511, which is spaced apart, is equipped with the second melt of cylinder base disk fairlead 512, and the cylinder base disk second is moltenBetween body fairlead 512 and the lower end for being formed in aforementioned inside and outside cartridge filter 53,52 and cylinder base disk 51 is similarly positioned underSecond melt discharging chamber 514 of side communicates, on cylinder base disk 51 and in the area for corresponding to aforementioned third melt filtration chamber 522Domain is spaced apart in the peripheral region of the second melt of cylinder base disk fairlead 512 and is equipped with cylinder base disk third melt fairlead 513, the cylinderAttic base third melt fairlead 513 and the third being formed between the lower end of outer cartridge filter 52 and the cavity wall of aforementioned cylinder chamber 11 are moltenBody cavity 523 communicates, and aforementioned fused mass flow guiding disk 4 is stacked on melt distribution plate 3, offers on the fused mass flow guiding disk 4 from meltThe upper surface of flow guiding disc 4 penetrates through the first fused mass flow guiding of flow guiding disc hole 41 to lower surface, the second fused mass flow guiding of a pair of of flow guiding discHole 42 and a pair of of flow guiding disc third fused mass flow guiding hole 43, the first fused mass flow guiding of flow guiding disc hole 41 is located at the center of fused mass flow guiding disk 4Position and corresponding with aforementioned first melt discharging chamber 532 and communicate, a pair of of the second fused mass flow guiding of flow guiding disc hole 42 andA pair of of flow guiding disc third fused mass flow guiding hole 43 is provided with the edge of fused mass flow guiding disk 4 and respectively with above-mentioned second,Three melt discharging chambers 514,523 are corresponding and communicate, and aforementioned melt distribution plate 3 is stacked on aforementioned spinneret 2, in the meltFirst diversion trench of melt distribution plate 31, the second diversion trench of a pair of of melt distribution plate 32 and a pair of of melt are offered on distribution plate 3Distribution plate third diversion trench 33, the first diversion trench of melt distribution plate 31 be provided with melt distribution plate 3 towards upper side and withThe first fused mass flow guiding of preceding guide disk hole 41 is corresponding, offers one in the bottom interval of first diversion trench of melt distribution plate 31First the first melt of diversion trench fairlead 311 of group, which is provided with molten with annular shapeFirst melt annular groove 34 of side of the body distribution plate 3 under communicates, wherein each first melt fairlead 311 is correspondingThere are a first melt annular groove 34, a pair of of the second diversion trench of melt distribution plate 32 and a pair of of melt distribution plate third diversion trench 33The position for corresponding respectively to second, third aforementioned melt discharging chamber 514,523 be provided with melt distribution plate 3 towards upper oneThe edge of side, wherein respectively offer one second diversion trench second at the both ends of a pair of of the second diversion trench of melt distribution plate 32Melt fairlead 321, the second melt of the second diversion trench fairlead 321 and annular shape are provided with melt distribution plate 3 underSecond melt annular groove 35 of side communicates, and respectively offers a third at the both ends of a pair of of melt distribution plate third diversion trench 33 and leadsChute third melt fairlead 331, the third diversion trench third melt fairlead 331 and annular shape are provided with melt distribution plate 3The third melt annular groove 36 of side under communicates, aforementioned the first melt of spinneret leadout hole 21 and the first melt above-mentionedAnnular groove 34 communicates, and aforementioned the second melt of spinneret leadout hole 22 is communicated with aforementioned second melt annular groove 35, and aforementioned spinneretThe second melt of plate leadout hole 23 is communicated with aforementioned third melt annular groove 36.
See Fig. 1 to Fig. 2 and Fig. 6, the first, second, third melt annular groove 34,35,36 above-mentioned forms one each otherEvery one positional relationship (for details, reference can be made to Fig. 6), for ease of description, it is shown in FIG. 6 six annular grooves, first, second,Third melt annular groove 34,35,36 respectively has two, on the basis of location status shown in Fig. 6, from inside to outside are as follows: two group first,Two, third melt annular groove 34,35,36.
Continue to see Fig. 1 and Fig. 2, constituting in the lower inner wall of the cylinder chamber 11 of aforementioned cylinder 1 has a spinneret supporting stationRank seat 111 is provided with a bearing mount sealing ring 1111 in spinneret bearing mount 111, in the cylinder chamber of cylinder 1Constituting in 11 upper inside wall has locking screw female ring to cooperate internal screw thread 112, in side of the aforementioned spinneret 2 under and surroundsThe surrounding composition of spinneret 2 has a spinneret supporting cavity 25, the spinneret supporting cavity 25 and aforementioned bearing mount sealing ring1111 match, and have locking screw female ring on the outer wall of aforementioned locking screw female ring 7 and around the surrounding of locking screw female ring 7 compositionExternal screw thread 71, the locking screw female ring external screw thread 71 are threadedly engaged with locking screw female ring above-mentioned cooperation internal screw thread 112.
As shown in Fig. 1 and Fig. 2, a melt distribution plate is offered in the edge of aforementioned spinneret 2 towards upper sideDowel hole 26, and in side of the aforementioned melt distribution plate 3 under and corresponding to melt distribution plate dowel hole 26Position, which is constituted, a melt distribution plate positioning pin 37, which is inserted into aforementioned melt distribution plate dowel holeIn 26；Offered with space state for screwing locking screw female ring 7 towards a upper side surface in aforementioned locking screw female ring 7 orThe manual operating groove 72 of the hardware tool unscrewed, the typical example such as spanner of hardware tool designated herein.
The lower part of disk 6 is imported in aforementioned melt and has a upper surface for inclination around the surrounding composition that melt imports disk 6Melt import disk limit flange 64, the melt import disk limit flange 64 on be provided with a melt import disk limit methodBlue side sealing ring 641, the lower surface of aforementioned locking screw female ring 7 and the melt, which import disk and limit flange sealing ring 641 and seal, matchesIt closes.
A melt, which is extended with, on the top that aforementioned melt imports disk 6 imports cofferdam outside disk connector 65 and melt importing disk66 and one melt import disk center cofferdam 67, which imports the outer cofferdam 66 of disk and is located in melt importing disk connector 65, andMelt imports disk center cofferdam 67 and is located in the outer cofferdam 66 of melt importing disk, and melt imports the middle section in disk center cofferdam 67Space is configured to the first melt that is corresponding with aforementioned importing disk the first melting hole 61 and communicating and feeds chamber 671, and melt importsThe space that the inner wall and melt in the outer cofferdam 66 of disk import between the outer wall in disk center cofferdam 67 is configured to and aforementioned importing disk secondThe second melt that melt guide hole 62 communicates feeds chamber 661, and melt imports the inner wall of disk connector 65 and melt imports the outer cofferdam of diskSpace between 66 outer wall is configured to feed chamber 651 with the third melt that aforementioned importing disk third melt guide hole 63 communicates, andAnd it is provided with melt on the inner wall that melt imports disk connector 65 and imports connector inner thread 652, wherein in aforementioned thirdIn melt feeding chamber 651, melt imports in the outer cofferdam 66 of disk and melt imports in disk center cofferdam 67 and is each provided with a rubberRing type seal 68.
The first, second, third melt through melt-stoichiometry pump-metered such as PLA melt, PTT melt and PET melt are (followingBy importing with melt, the molten road that disk connector 65 is connect introduces aforementioned first melt feeding chamber 671 respectively, the second melt is fed together)Chamber 661 and third melt feed chamber 651.
Still see Fig. 1 and Fig. 2, import the bottom of disk 6 in aforementioned melt and is led corresponding to the first melt of aforementioned importing diskThe position of the lower end in hole 61 is embedded with importing disk the first melt guide hole sealing ring 611, and is corresponding to aforementioned importing disk secondThe position of the lower end of melt guide hole 62 is embedded with importing disk the second melt guide hole sealing ring 621, is led by the first melt of importing diskHole sealing ring 611 will import the first melt of disk guide hole 61 and border on aforementioned first melt filtration chamber top sealing plate through-hole 53111The surrounding at position forms sealing, and by importing disk the second melt guide hole sealing ring 621 will import the second melt of disk guide hole 62 withThe surrounding for bordering on position of aforementioned second melt filtration chamber top sealing plate through-hole 52111 forms sealing；The bottom of disk 6 is imported in meltAnd an outer cartridge filter embeded slot 69a is offered in the position for the upper end for corresponding to aforementioned outer cartridge filter 52, and before corresponding toThe position for stating the upper end of interior cartridge filter 53 offers cartridge filter embeded slot 69b in one, outer cartridge filter embeded slot 69a and outer cartridge filter52 upper end scarf, and the upper end scarf of interior cartridge filter embeded slot 69b and interior cartridge filter 53；On aforementioned second melt filtration chamber topSealing plate 5211 offers an importing disk dowel hole 52112 towards upper side, and in the bottom of melt importing disk 6 and rightImporting a disk positioning pin 69c, importing disk positioning pin 69c should be fixed in the position for importing disk dowel hole 52112 and importDisk dowel hole 52112 matches, and the importing disk dowel hole 52112 is blind hole.
Continue to see Fig. 1 and Fig. 2, melt-filtered mechanism 5 above-mentioned further includes once filter device 54 and a secondary filterDevice 55, a filter device 54 include the first, second prefiltration net 541,542 and third prefiltration net 543, the first prefiltrationThe top of aforementioned first melt chamber 531 is arranged in net 541, and the second prefiltration net 542 is arranged in aforementioned second melt filtration chamber 521Top, and the top of aforementioned third melt filtration chamber 522 is arranged in third prefiltration net 543, and secondary filter 55 includesThe bottom of aforementioned first melt filtration chamber 531, middle filtering is arranged in interior, domestic and abroad filter screen 551,552,553, filtering net 551The bottom of aforementioned second melt filtration chamber 521 is arranged in net 552, and aforementioned third melt filtration chamber 522 is arranged in outer net 553Bottom.
As shown in Figure 2, under actual use state, in the first melt filtration chamber 531 and it is located at the first prefiltrationIt is provided with the first melt filtration sand 8a between net 541 and filtering net 551, in the second melt filtration chamber 521 and is located at theThe second melt filtration sand 8b is provided between two prefiltration nets 542 and middle filter screen 552, and in third melt filtration chamber 522And third melt filtration sand 8c is provided between third prefiltration net 543 and outer filter screen 553.
See Fig. 3 and Fig. 4 and Fig. 5, aforementioned the first melt of spinneret leadout hole 21 and the export of spinneret third meltThe direction that the lower end in hole 23 is towards aforementioned spinneret compounding flux extrusion cavities 24 is inclined, and the second melt of spinneret above-mentioned is ledPortal 22 for straight hole.
The internal diameter of the first, second melt of spinneret leadout hole 21,22 and spinneret third melt leadout hole 23 above-mentionedDirection from the upper surface of aforementioned spinneret 2 towards aforementioned spinneret compounding flux extrusion cavities 24 is gradually reduced and by the spinneretPlate compounding flux extrusion cavities 24 annex the melt outlet of the first, second, third melt of spinneret leadout hole 21,22,23, alsoIt is to say three melt outlet set of the first, second, third melt of spinneret leadout hole 21,22,23 to spinneret compounding fluxExtrusion cavities 24.
Fig. 7 is referred to, for ease of description problem, applicant is shown in FIG. 7 with circular arrangement and with interval shapeState is opened in two circle spinneret compounding flux extrusion cavities 24 of the bottom of spinneret 2, it has been observed that each spinneret compounding fluxExtrusion cavities 24 are assigned 21, the second melt of spinneret leadout holes 22 of the first melt of spinneret leadout hole and a sprayFilament plate third melt leadout hole 24.Since the first, second, third melt of spinneret leadout hole 21,22,23 is respectively to first,Two, form derived from third melt PLA melt as the aforementioned, PTT melt and PET melt is mutually identical, only each otherChannel it is different, thus applicant is below only illustrated the first melt.
By above mentioned and import the pipeline that is coupled of disk connector 65 for first melt (the present embodiment with aforementioned meltFor PLA melt) the first melt feeding chamber 671 is introduced, into the first melt in the first melt feeding chamber 671 successively through importing diskFirst melt guide hole 61, the first melt chamber top sealing plate through-hole 53111, the first prefiltration net 541, the first melt filtration sand 8a, cylinderThe first melt of attic base fairlead 511, the first melt discharging chamber 532, the first fused mass flow guiding of flow guiding disc hole 41, melt distribution plate firstDiversion trench 31, first the first melt of diversion trench leadout hole 311 and the first melt of spinneret leadout hole 21, which introduce, squeezes into spinneretCompounding flux extrusion cavities 24, at the same time by aforementioned identical mode by second, third melt leadout hole 22,23 of spinneret by theTwo, third melt such as PTT melt and PET melt, which introduce, squeezes into spinneret compounding flux extrusion cavities 24, compound by spinneretMelt extrusion hole 24 is squeezed out with bulking effect, and the strand of extrusion is three components shape compounding flux strand arranged side by side, through subsequent blowingIt is cooling to oil, pre- network, stretching, network and be wound into the processes such as cylinder again and obtain three components that cross-sectional shape is illustrated by Fig. 8Parallel composite fiber 9.
Embodiment 2:
PLA slice, PTT slice and PBT slice are dried respectively, obtain PLA(i.e. PLA chip drying by A) raw material preparationIt is material, the same below), PTT(, that is, PTT slice dried feed, it is the same below) and PBT(, that is, PBT chip drying material, it is the same below) dried feed,Wherein, the drying temperature of PLA slice is 80 DEG C, and the drying time of PLA slice is 12h, and the drying temperature of PTT slice is 90 DEG C,The drying time of PTT slice is 12h, and the drying temperature of PBT slice is 115 DEG C, and the drying time of PBT slice is 9h, the PLAThe volume ratio of slice, PTT slice and PBT slice three is 1: 0.1: 1, in this step, is contained in the PLA sliceThe furandicarboxylic acid of 15wt%, it is 1 that the PTT slice is by propylene glycol, terephthalic acid (TPA) and furandicarboxylic acid three in molar ratio: 0.05: 0. 5 composition；It is 1: 0.05 that the PBT slice is by butanediol, terephthalic acid (TPA) and furandicarboxylic acid in molar ratio: 0.5 composition.
B spinning melt) is prepared, it will be by PLA dried feed, PTT dried feed and PBT dried feed that step A) is obtained respectively throughOne screw extruder I, the second screw extruder II and III melting extrusion of third screw extruder and respectively through respective meltPipeline obtains the PLA spinning melt as the first component, the PTT as the second component is spun to respective metering pump-meteredSilk melt and the PBT spinning melt as third component, in this step, first screw extruder I are dry to the PLAThe screw rod melting extrusion temperature of dry material is 200 DEG C, and second screw extruder II melts the screw rod of the PTT dried feed and squeezesTemperature is 265 DEG C out, and the third screw extruder III is 235 DEG C to the screw rod melting extrusion temperature of the PBT dried feed, rightPressure is 10MPa before the pump of the metering pump of the PLA melt-stoichiometry, and pressure is 8MPa after pump, to the meter of the PTT melt-stoichiometryPressure is 9MPa before measuring the pump of pump, and pressure is 8MPa after pump, is to pressure before the pump of the metering pump of the PBT melt-stoichiometry8MPa, pressure is 8MPa after pump, and the inherent viscosity of the PLA is 1.2dL/g, and the inherent viscosity of the PTT is 1dL/g, describedThe inherent viscosity of PBT is 1.5 dL/g；
C finished product) is prepared, the PLA spinning melt as the first component, the PTT as the second component that will be obtained by step B) are spunSilk melt and the composite fiber spinning pack spin that manifold is introduced as the PBT spinning melt of third component, then successively through blowingAir cooling oils, pre- network, stretching, network and is wound into cylinder again, obtain by Fig. 8 cross-sectional shape illustrated three components simultaneouslyColumn type composite fibre 9, the cooling wind velocity of quenching described in this step are 0.6m/min, and cooling wind temperature is 25 DEG C,The oil applying rate to oil is 0.55%, and the pre- network is to make to be combined into fibre after squeezing out from the spinneret orifice of the spinneretFiber forms 3/m network by way of the Network device that spinneret draft roller is arranged between upper oil nozzle for oiling to fiberPoint, described stretch includes that the first draft area is stretched with the stretching of the second draft area, and the draw ratio that the first draft area stretches is 1 times,Upper drawing-off disk temperature is 75 DEG C, and the multiple that the second draft area stretches is 4 times, and lower drawing-off disk temperature is 115 DEG C；The network again isThe fibre bundle for completing stretching is set to form 90/m after the Network device being set between lower hot plate and winding friction rollerNexus；The winding relaxation for being wound into cylinder is than being 0.9: 1, that is, when the linear velocity for the tow for descending hot plate to export is 1m/s, volumeWinch spool linear velocity around cylinder is 0.9m/s, and the crimp percent of the three component parallel composite fibers is 45%, elongation at breakIt is 7dtex for 30%, breaking strength 2.6cn/dtex, elastic recovery rate (returning extensive rate) >=80% and monofilament linear density.
Remaining is the same as the description to embodiment 1.
Embodiment 3:
PLA slice, PTT slice and PBT slice are dried respectively, obtain PLA(i.e. PLA chip drying by A) raw material preparationIt is material, the same below), PTT(, that is, PTT slice dried feed, it is the same below) and PBT(, that is, PBT chip drying material, it is the same below) dried feed,Wherein, the drying temperature of PLA slice is 95 DEG C, and the drying time of PLA slice is 9h, and the drying temperature of PTT slice is 105 DEG C,The drying time of PTT slice is 9h, and the drying temperature of PBT slice is 130 DEG C, and the drying time of PBT slice is 6h, the PLAThe volume ratio of slice, PTT slice and PBT slice three is 1: 1: 0.8, in this step, is contained in the PLA sliceThe furandicarboxylic acid of 20wt%, it is 1 that the PTT slice is by propylene glycol, terephthalic acid (TPA) and furandicarboxylic acid three in molar ratio: 0.25: 0.25 composition；It is 1: 0.25 that the PBT slice is by butanediol, terephthalic acid (TPA) and furandicarboxylic acid in molar ratio: 0.3 composition.
B spinning melt) is prepared, it will be by PLA dried feed, PTT dried feed and PBT dried feed that step A) is obtained respectively throughOne screw extruder I, the second screw extruder II and III melting extrusion of third screw extruder and respectively through respective meltPipeline obtains the PLA spinning melt as the first component, the PTT as the second component is spun to respective metering pump-meteredSilk melt and the PBT spinning melt as third component, in this step, first screw extruder I are dry to the PLAThe screw rod melting extrusion temperature of dry material is 250 DEG C, and second screw extruder II melts the screw rod of the PTT dried feed and squeezesTemperature is 240 DEG C out, and the third screw extruder III is 280 DEG C to the screw rod melting extrusion temperature of the PBT dried feed, rightPressure is 8MPa before the pump of the metering pump of the PLA melt-stoichiometry, and pressure is 7MPa after pump, to the meter of the PTT melt-stoichiometryPressure is 10MPa before measuring the pump of pump, and pressure is 9MPa after pump, is to pressure before the pump of the metering pump of the PBT melt-stoichiometry11MPa, pressure is 9MPa after pump, and the inherent viscosity of the PLA is 0.6 dL/g, and the inherent viscosity of the PTT is 1.4dL/g,The inherent viscosity of the PBT is 0.75 dL/g；
C finished product) is prepared, the PLA spinning melt as the first component, the PTT as the second component that will be obtained by step B) are spunSilk melt and the composite fiber spinning pack spin that manifold is introduced as the PBT spinning melt of third component, then successively through blowingAir cooling oils, pre- network, stretching, network and is wound into cylinder again, obtain by Fig. 8 cross-sectional shape illustrated three components simultaneouslyColumn type composite fibre 9, the cooling wind velocity of quenching described in this step are 0.3m/min, and cooling wind temperature is 15 DEG C,The oil applying rate to oil is 0.8%, and the pre- network is to make to be combined into fine fibre after squeezing out from the spinneret orifice of the spinneretIt ties up and forms 5/m nexus by way of the Network device that spinneret draft roller is arranged between upper oil nozzle for oiling to fiber,Described stretch includes that the first draft area is stretched with the stretching of the second draft area, and the draw ratio that the first draft area stretches is 1.15 times,Upper drawing-off disk temperature is 90 DEG C, and the multiple that the second draft area stretches is 3 times, and lower drawing-off disk temperature is 95 DEG C；The network again isThe fibre bundle for completing stretching is set to form 60/m after the Network device being set between lower hot plate and winding friction rollerNexus；The winding relaxation for being wound into cylinder is than being 0.8: 1, that is, when the linear velocity for the tow for descending hot plate to export is 1m/s, volumeWinch spool linear velocity around cylinder is 0.8m/s, and the crimp percent of PLA, PTT and PBT tri- components from the Curl fiber is70%, elongation at break 80%, breaking strength 4cn/dtex, elastic recovery rate (returning extensive rate) >=90% and monofilament lines are closeDegree is 4dtex.
Remaining is the same as the description to embodiment 1.
In conclusion technical solution provided by the invention compensates for the shortcoming in prior art, invention has been favorably accomplishedTask has faithfully fulfilled the technical effect that applicant refers in technical effect column above.