Woven knitting composite construction based high-temp-resistant environmental protection filtrate of one kind and preparation method thereofTechnical field
The invention belongs to filter with separation material field, more particularly, to a kind of woven knitting composite construction Ji NaigaoWarm environmental protection filtrate and preparation method thereof.
Background technique
Sack cleaner is a kind of dry type dust filtration device, and the main filtration using fabric is to subtle, dryingDust is captured, and is able to satisfy emission request, harmless effect to reach filtered air.Existing heat resistance filter bag oneAs use using fibers such as P84, PPS, PTFE, aramid fiber, basalt, glasses as raw material, using nonwovens process, pierce and process through needleIt forms, pricker is all made of triangle, trifoil cross-section.In order to enhance the strength of filtrate, have among filtrate woven or knittingBase fabric.The strength of filtrate is provided jointly by surface layer fibre web and base fabric, and the contribution rate of strength respectively may be about 30% and 70%.
Filtrate is during pinprick reinforcement, with the high speed reciprocating motion up and down of pricker, needle point and barb impact base fabric andThe short fibre of fibre web leads to fibrous fracture or damage, and filtrate strength declines, and service life significantly reduces.
Summary of the invention
The purpose of the present invention is overcoming the above deficiency, provide a kind of woven knitting composite construction based high-temp-resistant environmental protection filtrate andPreparation method, utilization is woven, is knitted the structural stability and suitable type of compound base fabric, and oval pricker is to the damage of base fabricHurt lesser characteristic and prepare high-tenacity, high temperature resistance filtration material, extends the service life of filtrate.
To achieve the goals above, the present invention provides a kind of woven knitting composite construction based high-temp-resistant environmental protection filtrate, includingThe woven knitting composite construction base fabric as made of knitted structure and machine-knitted structure braiding, it is woven to be knitted the upper and lower of composite construction base fabricSurface is laid with composite fibre net, and the surface of the composite fibre net of any one side is equipped with micro porous filtration membrane coat.
The knitted structure of woven knitted composite material base fabric of the present invention is that stocking yarn uses plain stitch, double rib groupIt knits or rib construction；The machine-knitted structure is that warp thread and weft yarns form.The stocking yarn, warp thread and weft yarn are inorfilHigh-performance fiber Single Fiber or two kinds of fibers composite fibre yarn.The preferred glass of the inorfil or basalt are fineDimension, the preferred P84, PPS of high-performance fiber, PTFE, aramid fiber.
Woven knitting composite construction base fabric density of the present invention is 50-250g/m2, preferably 100-250g/m2。
Composite fibre net of the present invention is to cross interleaved mode multilayer by single layer fibre Netcom to be paved into, the composite fibre netDensity be 100-300g/m2, preferably 100-250g/m2, the single layer fibre reticular density is 15-25g/m2。
Filtrate of the present invention is with a thickness of 1.5-3.0mm, density 250-600g/m2, preferably 300-600g/m2。
The preparation method of woven knitting composite construction based high-temp-resistant environmental protection filtrate of the present invention, is by fiber spun yarnAfterwards, weaving is at woven knitting composite construction base fabric；The composite fibre net point that fiber is formed through mixing, combing, lapping, pre-needlingBe not laid on the upper and lower surface of composite construction base fabric, with oval pricker to base fabric and web carry out pinprick reinforcement carry out again it is wholeReason is prepared.
Woven knitting composite construction base fabric is by the plain stitch using stocking yarn braiding, interlock described in the above methodOr the knitted structure and use warp thread of rib construction and the plain woven structure of weft yarns weave.The yarn of use be byFiber is made through cotton carding, at item, rove, spinning process.
Fiber described in the above method be one or both of inorfil or the short fibre of high-performance fiber fiber by grab cotton,Shredding, the silvalin being mixed or basaltic buiky yarn.The fiber inorganic fiber or the short fibre of high-performance fiber, are adoptedThe short fibre for being 30-90.0mm with 1.2-9D, length, basalt fibre select zero twisted yarn, twisted yarn or rove.Wherein, silvalinThe line density of line selects twisted yarn, line density 150-300dtex, twist 35- in 3-10dtex, basalt yam stocking yarn50 twirls/50cm, basalt warp, weft yarn select rove, line density 600-2400dtex.
Pre-needling condition described in the above method are as follows: bestock: 1250 pieces/m, needling density 800-840 Ci/㎝2, needlePierce depth 11mm, web velocity 4m/min.
The condition of the thorn of needle described in the above method are as follows: needling density 210-2000 thorn/cm2, depth of needling 7-13mm, plant needle1000-3000 pieces of density/m, web output speed 0.5-2.5m/min.Pricker used has two ribs, on every rib there are twoBriar tooth, briar tooth are spaced with briar tooth.
Arrangement described in the above method is to singe, be formed and coating；Wherein, singing is the short and small fibre for removing filter material surfaceDimension, sizing mainly improve the thermal stability of filtrate, and coating is to coat micro porous filtration membrane coat in fabric surface, enhances filtrateFilter efficiency.The coating can be that (aperture is for PTFE ultrafiltration membrane coat (aperture be 0.01~0.1 μm) or ceramic membrane coat0.8nm~1 μm).
It is above-mentioned it is woven knitting composite construction based high-temp-resistant environmental protection filtrate preparation method specifically includes the following steps:
(1) composite fibre net is made through combing, lapping and pre-needling process in fiber；
(2) yarn is made through cotton carding, at item, rove, spinning process in fiber；Yarn uses plain group as stocking yarnKnit, interlock or rib construction are knitted structure, yarn, using plain woven structure, is woven into machine as warp thread and weft yarnWeaving knitting composite structure base fabric；
(3) layer tiles composite fibre net respectively in woven knitting composite construction base fabric, acupuncture apparatus is transported to, by plantingFiltrate is made in the upper and lower reciprocal pinprick reinforcement of oval pricker high speed on needle plate；
(4) filtrate is by singing, being formed and coating obtains final products.
The filtrate of above method preparation is with a thickness of 1.5-3.0mm, weight 250-600g/m2, vertically and horizontally ultimate strength 900-1600N/5cm, Air permenbility 100-200L/dm2·min。
Compared with prior art, the invention has the benefit that
(1) woven knitting compound base fabric is a kind of new structure (CWK) fabric, wherein existing mutually handed over by warp thread and weft yarnKnit the machine-knitted structure to be formed, and have by stocking yarn bending into coil, and mutually wear and the knitted structure that is formed, be two kinds of knotsStructure it is compound.Base fabric of the present invention has merged woven and knitting technology simultaneously, and base fabric is made to have structural stability and suitable type.
(2) oval pricker cross section in same needle thorn diameter is maximum, wink when pricker pumps, with base fabricBetween contact most mild, the damage of base fabric and short fibre of non-woven layer is less, strongly than same fiber, specification filtrate of the same race raising10% or more.It can prolong the service life.
(3) fiber environmental that uses of the present invention and can Wear-resistant, high-temperature resistant, short fibre is also beneficial to avoid being needled damage.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of woven knitting composite construction based high-temp-resistant environmental protection filtrate of the present invention.
Fig. 2 is the structural schematic diagram of woven knitting composite construction base fabric of the present invention.
Fig. 3 is the structural schematic diagram of oval pricker of the present invention.
Fig. 4 is the sectional view of oval pricker of the present invention.
In figure: the woven knitting composite construction base fabric of 1-, 2- composite fibre net, 3- filter membrane coat, 4- stocking yarn, 5- warpYarn, 6- weft yarn.
Specific embodiment
Below in conjunction with the specific embodiment preferred embodiment that the present invention will be described in more detail.
According to Fig. 1 and the woven knitting composite construction based high-temp-resistant environmental protection filtrate of one kind shown in Fig. 2, including by knitted structureWith woven knitting composite construction base fabric 1 made of machine-knitted structure braiding, the upper and lower surface of the woven knitting composite construction base fabric 1It is laid with composite fibre net 2,2 surface of composite fibre net of any one side is equipped with filtering membrane coat 3.
The knitted structure of woven knitted composite material base fabric 1 of the present invention is that stocking yarn 4 uses plain stitch, double ribTissue or rib construction, the machine-knitted structure are that warp thread 5 and weft yarn 6 are interwoven.The composite fibre net 2 is by single layer fibreNetcom crosses interleaved mode multilayer and is paved into.
Embodiment 1
By the PTFE chopped strand of 3.2D*51mm, composite fibre net is formed after shredding, combing, lapping and pre-needling2, density 100g/m2。
Pre-needling: bestock: 1250 pieces/m, 840 Ci/㎝ of needling density2, depth of needling 11mm, web velocity 4m/min。
Woven knitting composite construction base fabric 1 is using 3.2dtex*51mmPTFE chopped strand through cotton carding, at item, rove, thinYarn made of yarn process, stocking yarn 4 form 1+1 rib-loop bottom tissue, and warp thread 5 and weft yarn 6 are organized with being lining into straight modeIn, warp thread 5 serves as a contrast in the wale of ground tissue, and weft yarn 6 serves as a contrast between ground tissue coil and warp thread, forms 2 layers of weft yarn 6 and 2Layer warp thread 5.It include 4 mailles in cellular construction, 2 warp thread 5 and 4 piece weft yarns, 6,2 warp thread 5 are served as a contrast respectively in front coilWithin stringer and within purl loop stringer, 4 weft yarns 6 are lining into same row and are separated into 2 groups, such as Fig. 2 by warp threadIt is shown.Base fabric through it is close be 62/5cm, filling density is 57/5cm, and base fabric density is 210g/m2, through being 1011.4N to strength, breakSplitting elongation is 13.7%, and broadwise strength is 1081.7N, elongation at break 20.1%.
The upper layer of woven knitting composite construction base fabric 1 tiles composite fibre net 2 respectively, is transported to acupuncture apparatus, byThe oval pricker high speed being implanted on needle plate carries out reciprocal needle thorn up and down, forms filtrate；Filtrate through singing, be formed, coating workSequence, described singe is the small short fibers for removing filter material surface, and coating is to apply PTFE ultrafiltration membrane coat in filtrate side.
Needing machine (model: SPN-250 type, Shantou Sanhui Nonwoven Machinery Factory Co., Ltd.'s production) in above-mentioned needle-punching runPunch frequency is 430 times/min, bestock 3000 pieces/m, breadth 2500mm, web output speed 1.5m/min, needle thorn1040 thorns of density/cm2, depth of needling 9mm.
The pricker of needing machine is that (pricker model 15*18*40*3DT, Germany, manufacturer George Grosz are public for oval prickerDepartment).Pricker has two ribs, and there are two briar tooths on every rib, and briar tooth is spaced with briar tooth, and the distance between every two briar tooth is3.18mm as shown in Figure 3 and Figure 4.
Manufactured high-strength high temperature resistance filtration material, density 410g/m after pinprick reinforcement2, through being 990.3N, fracture to strengthElongation is 11.8%, and broadwise strength is 972.1N, elongation at break 10.1%.
Embodiment 2
By short fine and 1.6D*61mm the short fibre of PPS of the PTFE of 3.2D*51mm, by shredding, mixing, combing, cross lappingAfter pre-needling, composite fibre net 2, density 120g/m are formed2。
Pre-needling: bestock: 1250 pieces/m, needling density pierces 800 thorns/cm2, depth of needling 11mm, web velocity4m/min。
Woven knitting composite construction base fabric 1 is using 3.2dtex*51mmPTFE chopped strand through cotton carding, at item, rove, thinYarn made of yarn process, stocking yarn 4 form 1+1 rib-loop bottom tissue, and warp thread 5 and weft yarn 6 are organized with being lining into straight modeIn, warp thread 5 serves as a contrast in the wale of ground tissue, and weft yarn 6 serves as a contrast between ground tissue coil and warp thread, forms 2 layers of weft yarn 6 and 2Layer warp thread 5.It include 4 mailles in cellular construction, 2 warp thread 5 and 4 piece weft yarns, 6,2 warp thread 5 are served as a contrast respectively in front coilWithin stringer and within purl loop stringer, 4 weft yarns 6 are lining into same row and are separated into 2 groups, such as Fig. 2 by warp threadIt is shown.Through it is close be 82/5cm, filling density is 76/5cm, and base fabric density is 200g/m2, through being 1011.4N to strength, fracture is stretchedLong rate is 13.7%, and broadwise strength is 1081.7N, elongation at break 20.1%.
The upper layer of woven knitting composite construction base fabric 1 tiles composite fibre net 2 respectively, is transported to acupuncture apparatus, byThe oval pricker high speed being implanted on needle plate carries out reciprocal needle thorn up and down, forms filtrate；Filtrate through singing, be formed, coating workSequence, described singe is the small short fibers for removing filter material surface, and coating is to coat ceramic membrane coat on one side in filtrate.
Needing machine (model: SPN-250 type, Shantou Sanhui Nonwoven Machinery Factory Co., Ltd.'s production) in above-mentioned needle-punching runPunch frequency is 450 times/min, bestock 3000 pieces/m, breadth 2500mm, web output speed 1.5m/min, needle thorn1040 thorns of density/cm2；Depth of needling is 9mm.
The pricker of needing machine is that (pricker model 15*18*40*3DT, Germany, manufacturer George Grosz are public for oval prickerDepartment).Pricker has two ribs, and there are two briar tooths on every rib, and briar tooth is spaced with briar tooth, and the distance between every two briar tooth is3.18mm as shown in Figure 3 and Figure 4.
Manufactured high-strength high temperature resistance filtration material, density 440g/m after pinprick reinforcement2, through being 983.1N, fracture to strengthElongation is 11.4%, and broadwise strength is 977.3N, elongation at break 18.3%.