A kind of controlled thermoplastic composite honeycomb board of continuous fiber content and preparation methodTechnical field
The invention belongs to thermoplastic composite preparing technical field, particularly to a kind of controlled heat of continuous fiber contentPlasticity composite honeycomb sheet material and preparation method thereof.
Background technology
Continuous fiber (such as glass, carbon fibre etc.) strengthens thermoplastic composite, comes from carbon fiber-reinforced thermosetting resin pre-Leaching material, but it has more preferable shock resistance and moulding processability than prepreg.The product of early stage is with polyether-ether-ketone (PEEK)Contour performance engineering plastics substitute thermosetting resin and are used for Aero-Space and war products, in recent years impregnate skill with thermoplastic resinThe diffusion of art, resin matrix expands to polypropylene (PP) from engineering plastics, the general-purpose thermoplastic plastic such as polyester (PET), not only greatlyReduce greatly the price of plastic sheet, also significantly reduce the requirement that technique moulded by plastic sheet to one-tenth.The application of plastic sheet toThe fields such as automobile, transport, building materials, Leisure Sport are developed, and the species of fiber also extends to the various fiber such as carbon fibre from glass,Thus becoming one of product with fastest developing speed in composite markets.
Continuous fiber reinforced thermoplastic composite material, its production method has many kinds, but key is intended to resolve continuous fibreThe combination of peacekeeping thermoplastic, and continuous fiber being uniformly distributed in thermoplastic, meanwhile, control continuous fiberContent to adapt to different purposes.Existing research mainly has three kinds, and (1) is insertion fiber in the middle of thermoplastic resin sheetFelt becomes TP/mat/TP sandwich material, and hot repressing obtains sheet material；(2) it is in glass fibers by thermoplastic resin extrusion uniform foldWei Bu (or felt) surface, heats roll-in using hot-pressing roller, carries out pre-preg to glass fabric (or felt)；(3) it is using meltingResin carries out pre-preg to glass fibre, is used for hot pressing with its fabric for base material.But, all there is various asking in above method, due to fiber felt and interlaminar resin poor compatibility, the sheet metal layer that hot pressing obtains is weak with inter-layer bonding force, easily goes out for topic, such as method (1)Existing peeling；Method (2) although in pre-preg has been carried out to glass fabric (or felt), to improve the knot of itself and resin matrixMake a concerted effort, but its dipping effect is mainly carried out on surface, be difficult to make glass in an intermediate position disperse and be impregnated, soDipping effect is undesirable；And method (3) although in dipping cladding is first carried out to glass bundle, because single bundle glass bundle is only in faceUpper resin-coated, the glass within fibre bundle cannot impregnate, and interaction force is weak, and resin-coated amount is big, has a strong impact on glassFine loading is it is impossible to realize filling thus obtaining excellent reinforced effects in a large number.The present invention is by continuous fiber and resin fibreAfter expansion, blending winding, to produce all kinds of continuous fiber reinforced thermoplastic composite material base materials using the method weaved cotton cloth, and leads toAfter Overheating Treatment, a step hot pressing obtains corresponding sheet material, including the middle composite honeycomb sheet material containing honeycomb interlayer, its continuous fiberContent is controlled, can be used for different fields.
Content of the invention
In order to overcome shortcoming and the deficiency of above-mentioned prior art, the primary and foremost purpose of the present invention is to provide a kind of continuous fiberThe preparation method of the controlled thermoplastic composite honeycomb board of content.
Another object of the present invention is the thermoplastic composite honeycomb providing continuous fiber content prepared by said method controlledSheet material.
The purpose of the present invention is realized by following proposal：
A kind of preparation method of the controlled thermoplastic composite honeycomb board of continuous fiber content comprises the following steps：
Continuous fiber and resin fibre are launched respectively, winds after blending, obtain bundle of composite fibers, be woven to compoundFabric, heat treatment, composite fiber fabric after each up and down laminated multi-layer heat treatment of cellular board, a step hot pressing is combined and obtainsThermoplastic composite honeycomb board；
Described heat treatment refers to composite fiber fabric is carried out baking the affected part after applying some drugs process, and the temperature that described baking the affected part after applying some drugs are processed is the heat change of resinBetween shape temperature and melt temperature, the time of described heat treatment can be 12～48h.
The present invention passes through the composite fiber fabric that braiding is obtained between the heat distortion temperature and melt temperature of its resinAt a temperature of carry out heat treatment, efficiently solve the thermal deformation that fabric produces in hot pressing and shrink problem, need not be first by base material heatPressure obtains sheet material hot repressing and obtains sheet material, can be obtained the sheet material of ungauged regions deformation by base material one step hot pressing, and how second highest eliminateThe impact of the material property that warm pressure causes, is further ensured that the excellent properties of material.
Wind after expansion of the present invention, blending on unidirectional after preferably continuous fiber and resin fibre being launched respectivelyLower stacking, carrying out rolling using roller makes its mix homogeneously wind again, obtains bundle of composite fibers.
Further, described continuous fiber can be one or more fiber, can be such as glass fibre, carbon fiber, high siliconOxygen fiber, quartz fibre, basalt fibre, high polymer fibre, metallic fiber, metal-oxide fiber etc..
Further, described continuous fiber is first surface-treated.The described table being surface-treated as this area routineFace is processed, and is such as processed using surface conditioning agent.Those skilled in the art all know, fibre bundle and the resin material compatibilityExtreme difference, it is using being front required to be processed using surface conditioning agent.The present invention is using conventional surface conditioning agent to fibre bundleCarry out conventional treatment.
Further, a diameter of 5～20 μm of described continuous fiber.
Described resin fibre is to make, by thermoplastic resin wire drawing, the fiber obtaining.Described thermoplastic resin can be poly-Ethylene (PE), polypropylene (PP), poly- to two polyethylene terephthalate alcohol (PET), polystyrene (PS), polyamide (PA), poly- carbonAcid esters (PC) etc..
Further, described resin fibre also include above-mentioned thermoplastic resin modified after the modified resin that obtains fineDimension, such as obtains modified resin fiber by carrying out wire drawing again after thermoplastic resin and other modified additive mixed processing.Described otherAuxiliary agent may include but be not limited to fire retardant, antistatic additive, age resister etc., thus giving composite honeycomb sheet material properties.
Described composite fiber fabric can be obtained by woven.
Described composite fiber fabric is preferably bi-axial fabric, using 0 °, 90 ° of form.
Described hot pressing is the conventional hot-press method in this area, including machine pressure hot pressing, pressure roller hot pressing, double steel band heatPressure, vacuum bag hot press or other can implement the mode of hot pressing, preferably pressure roller hot pressing.
The present invention provides the continuous fiber reinforced thermoplastic composite honeycomb sheet material that said method prepares.
The present invention passes through to launch respectively to carry out blending winding again by continuous fiber and resin fibre, because being made using roller rollingResin fibre is dispersed between fiber, solves the fiber problem that is uniformly dispersed in the composite, and is made by adjustmentThe loading of the ratio effective control continuous fiber of continuous fiber and resin fibre.Fiber of the present invention and resin fibre launchBlending is sufficiently impregnated with it is only necessary to adding a small amount of resin fibre and can achieve to fiber, achievable fiber up to 70% a large amount ofFilling, the sheet material preparing has excellent strength and stiffness, is suitable for the requirement of different field.And can due to being uniformly distributedEffectively improving the associativity of itself and fiber, thus realizing excellent combination effect, solving various fibers and thermoplastic resinInterface cohesion problem.
And the present invention by composite fiber fabric between the heat between the heat distortion temperature and melt temperature of its resin fibreHandling process, efficiently solves the thermal deformation contraction problem that fabric produces in hot pressing, a step hot pressing can obtain ungauged regions deformationSheet material, and need not move through first production sheet, reproduction sheet material, the step simplifying material hot pressing, substantially increase production effectRate, saves mass energy.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
Used in the following example, reagent all can obtain from commercial channel.
Embodiment 1
A kind of preparation method of the controlled thermoplastic composite honeycomb board of continuous fiber content, comprises the following steps：
The continuous glass fibre buying a diameter of 5～20 μm returning is surface-treated using surface conditioning agent.
After processing, continuous glass fibre and PP resin fibre launch respectively, and unidirectional stacked on top of one another is rolled using rollerPressure makes its mix homogeneously wind again, obtains bundle of composite fibers.Woven braiding is utilized to adopt 0 °, 90 ° of form obtains twin shaftTo composite fiber fabric, at 90 DEG C, baking the affected part after applying some drugs process 24h, in the composite fibre after respectively 3 layers of baking the affected part after applying some drugs of stacking are processed up and down of cellular boardFabric, pressure roller hot pressing is combined, and obtains thermoplastic composite honeycomb board.
Wherein, the mass ratio of described continuous glass fibre and PP resin fibre is 30：70.
Correlated performance test is carried out to gained sheet material, the results are shown in Table 1.
Embodiment 2
A kind of preparation method of the controlled thermoplastic composite honeycomb board of continuous fiber content, comprises the following steps：
The continuous glass fibre buying a diameter of 5～20 μm returning is surface-treated using surface conditioning agent.
After processing, continuous glass fibre and PP resin fibre launch respectively, and unidirectional stacked on top of one another is rolled using rollerPressure makes its mix homogeneously wind again, obtains bundle of composite fibers.Woven braiding is utilized to adopt 0 °, 90 ° of form obtains twin shaftTo composite fiber fabric, at 90 DEG C, baking the affected part after applying some drugs process 24h, in the composite fibre after respectively 3 layers of baking the affected part after applying some drugs of stacking are processed up and down of cellular boardFabric, pressure roller hot pressing is combined, and obtains thermoplastic composite honeycomb board.
Wherein, the mass ratio of described continuous glass fibre and PP resin fibre is 60：40.
Correlated performance test is carried out to gained sheet material, the results are shown in Table 1.
Embodiment 3
A kind of preparation method of the controlled thermoplastic composite honeycomb board of continuous fiber content, comprises the following steps：
The continuous glass fibre buying a diameter of 5～20 μm returning is surface-treated using surface conditioning agent.
After processing, continuous glass fibre and PP resin fibre launch respectively, and unidirectional stacked on top of one another is rolled using rollerPressure makes its mix homogeneously wind again, obtains bundle of composite fibers.Woven braiding is utilized to adopt 0 °, 90 ° of form obtains twin shaftTo composite fiber fabric, at 90 DEG C, baking the affected part after applying some drugs process 24h, in the composite fibre after respectively 3 layers of baking the affected part after applying some drugs of stacking are processed up and down of cellular boardFabric, pressure roller hot pressing is combined, and obtains thermoplastic composite honeycomb board.
Wherein, the mass ratio of described continuous glass fibre and PP resin fibre is 70：30.
Correlated performance test is carried out to gained sheet material, the results are shown in Table 1.
Comparative example 1
Insertion glass mat sandwich material in the middle of two-layer PP resin base material, hot pressing obtains sheet material, wherein fiber fillingMeasure as 50%, be respectively laminated 3 layer of sheet material up and down in cellular board, pressure roller hot pressing again is combined, and obtains sheet material.
Correlated performance test is carried out to gained sheet material, result shows in the case of the identical number of plies and sheet metal thickness, thisThe sheet material various performance parameters that bright method obtains are significantly improved, and the sheet material that obtains of comparative example 1 to there is piece interlayer easy-peelFrom phenomenon.
Comparative example 2
Using PP, continuous glass-fiber is carried out with unidirectional pre-preg, recycle woven braiding to adopt 0 °, 90 ° of form obtains twin shaftTo composite fiber fabric, respectively it is laminated 3 layer of sheet material up and down in cellular board, pressure roller hot pressing is combined, and obtains sheet material.
Correlated performance test is carried out to gained sheet material, result shows, in the case of the identical number of plies and sheet metal thickness, thisThe sheet material various performance parameters that bright method obtains are significantly improved, and the resin-coating due to dipping of comparative example 2 is in fibreDimension bundle surface, in composite fiber fabric, glass fibre filling amount only up to be 50%, and its resin demand is big, leads to continuous glass-fiber to be filledAmount cannot be lifted, and the embodiment of the present invention can control continuous glass-fiber loading and is up to 70%, thus obtaining with respect to prior artMore excellent technique effect.
The performance parameter of table 1 continuous fiber reinforced thermoplastic composite honeycomb sheet material
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not subject to above-described embodimentLimit, other any spirit without departing from the present invention and the change made under principle, modification, replacement, combine, simplify,All should be equivalent substitute mode, be included within protection scope of the present invention.