CN102416718B - Cluster fiber thermoplastic composite sheet material - Google Patents
Cluster fiber thermoplastic composite sheet material Download PDFInfo
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- CN102416718B CN102416718B CN201110207458.0A CN201110207458A CN102416718B CN 102416718 B CN102416718 B CN 102416718B CN 201110207458 A CN201110207458 A CN 201110207458A CN 102416718 B CN102416718 B CN 102416718B
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Abstract
The invention discloses a cluster fiber thermoplastic composite sheet material, comprising a sheet material upper superficial layer (37), an intermediate fiber and mixed powder matrix layer (35) and a sheet material lower superficial layer (36). The intermediate fiber and mixed powder matrix layer (35) is produced by the following steps: (1) fiber shearing; (2) pneumatic disperse-mixing-adherence; (3) mixing settlement to form net. The cluster fiber thermoplastic composite sheet material of the invention has enhanced shear behavior, strong tension and bending resistance mechanical properties at each direction, high puffed rate, low density, and high quality intensity, and is lightweight, humidity resistant, nontoxic and harmless.
Description
Technical field
The present invention relates to a kind of composite sheet, particularly relate to a kind of cluster-shaped fiber thermoplastic composite sheet material.
Background technology
No matter be fiber thermoplastic composite sheet material prepared by dry process or wet processing both at home and abroad at present, as linen fiber composite plates material, PP glass fiber composite board material etc., due to its technique, make in the matrix of sheet material the fiber orientation stronger, affect mechanical index and the performance of sheet material.Dry process adopts combing, lapping, the needling process of non-textile technology, it be by fortifying fibre with meldable fibre after mixing, be prepared into Nomex by shredding, combing, lapping, acupuncture etc., acupuncture base felt through curing, compound, typing is prepared into fiber thermoplastic composite sheet material, sheet base is established and is formed by multilayer single fiber net laying, fiber directionality is stronger, the acupuncture fixed network is larger to the damage of fiber, make the vertical transverse strength ratio of composite board all be greater than 1:1.5, combing acupuncture fiber base felt uniformity is poor, causes the sheet material irregularity all 4%～7%; The sheet base of wet processing preparation is the paper technology manufacture by having improved, it replaces the water in traditional slurry with foam, usually slurry plays and carries fiber and mineral filler is formed to the fiber base felt, the fiber base felt through hydrofuge, cure, compound, typing is prepared into composite board, sheet base is comprised of the stack of multilayer single fiber net equally, fiber is subject to that liquid mobile to affect directionality stronger, causes the vertical transverse strength ratio of wet processing composite board fiber all to be greater than 1:2.2.
Due to above-mentioned thermoplastic composite sheet material process characteristic, in sheet material, fibre web is established by multilayer single fiber net laying and stack forms, fiber is not had an isotropism, make sheet material vertical transverse strength ratio difference different large, the sheet material anti-shearing force is poor, at present height stretching gadget is remained by increasing material unit are grammes per square metre and realizes, the material reducing effect of lightweight is not remarkable.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of shear behavior and improves, and the tension of all directions and anti-bending mechanics performance are strong, and expansion rate is high, and density is low, the cluster-shaped fiber thermoplastic composite sheet material that quality intensity is high.
In order to solve the problems of the technologies described above, cluster-shaped fiber thermoplastic composite sheet material provided by the invention, comprise the sheet material upper surface layer, median fiber and mixed-powder base layer and sheet material undersurface layer, described median fiber and mixed-powder base layer are to adopt the following steps production method: the filament with the fixed length of upper electrostatic charge enters into the jet of pneumatic dispersion mixing chamber under the effect of delivery air via conveyance conduit, be subject to delivery air, the rising diffusing air current, and after organizing side direction more and stirring and to cut the mutual shear action of air-flow, make the filament that enters into pneumatic dispersion mixing chamber obtain fully disperseing to form cluster-shaped fiber and fibre single thread, simultaneously, cluster-shaped fiber and fibre single thread reach even with the mixed-powder sprayed into to be mixed and adhesion, and the mixed-powder sprayed into is with static, cluster-shaped fiber and fibre single thread are subject to ascending air and side direction to stir the effect that air-flow forms flow field of cutting, continuously by conveyance conduit, be delivered to the mixing expansion chamber, the cluster-shaped fiber that is stained with mixed-powder descends slowly and lightly in becoming net sedimentation bucket with fibre single thread and mixed-powder under the effect in gravity and flow field, the cluster-shaped fiber that becomes net sedimentation bucket will be stained with mixed-powder is deposited in on the net conveyer belt with fibre single thread and mixed-powder uniformly, successively the cluster-shaped fiber that is stained with mixed-powder of sedimentation and fibre single thread and mixed-powder have formed the mixed and disorderly unordered three-dimensional cluster-shaped fiber embryo felt of multiple-layer stacked, it is one fixed width, thickness, uniform cluster-shaped fiber and mixed-powder base layer.
Described mixed-powder is polypropylene, polyethylene, polyvinyl chloride or polyester.
Described median fiber is carbon fiber, glass fibre, flaxen fiber or wood-fibred.
Described fibre length is 10mm～150mm.
In described median fiber and mixed-powder base layer, the mass ratio of cluster-shaped fiber and mixed-powder is 50～65:50～35.
Adopt the cluster-shaped fiber thermoplastic composite sheet material of technique scheme, the sheet material fiber dispersion, becoming net is to adopt pneumatic stirring dispersing, mix, settling into the network process device completes, it by continuous fiber through loosening, disperse, shearing fixed length, fiber after shearing enters pneumatic dispersion mixing chamber under the effect of delivery air, the fiber that enters into pneumatic dispersion mixing chamber is subject to ascending air and flow field effect progressively to enter the dispersion stirring region, fibre bundle with flow field by the dispersion stirring region, be subject to many group clockwise directions and contrary pin direction to cut the effect of cutting of swirling eddy simultaneously, make fibre bundle disperse stirring region to obtain progressively being dispersed into crooked ultimate fibre and curling cluster-shaped fiber, in the time of the fibre bundle dispersed with stirring under the effect of static the adhesion section mixed-powder, cluster-shaped fiber after disperseing to adhere to is under the effect in flow field, be delivered to continuously and be mixed into solarium, enter into cluster-shaped fiber and the mixed-powder of the adhesion that is mixed into solarium, owing to being subject to flow field and Gravitative Loads to enter electrostatic powder atomization zone, mixed-powder forms electrostatic powder atomization zone under the effect of dust air-flow and static, make the cluster-shaped fiber surface regional by this further evenly adhere to mixed-powder, the cluster-shaped fiber evenly mixed after adhering to falls to into lace curtaining with mixed-powder with air-flow and deadweight, successively fiber and the polypropylene powder of sedimentation have formed mixed and disorderly unordered cluster-shaped fibre web, the stack of the continuous cluster-shaped fibre web of multilayer has formed mixed and disorderly unordered three-dimensional cluster-shaped fiber and mixed-powder base layer, mixed and disorderly unordered three-dimensional cluster-shaped median fiber and mixed-powder base layer are through baking, be prepared into cluster-shaped fiber thermoplastic composite sheet material after typing.
Advantage of the present invention is because the sheet material medium-length fibre exists in thermoplastic sheets with the cluster-shaped form, its molding mode is an overall structure, unlike traditional product, by paved in multi-layers, formed, do the used time in lateral external forces, there are not the phenomenons such as delamination, lamellar spacing, layer and fault position, therefore its shear behavior is superior to like product; Secondly the fiber existence form has isotropism, therefore the tension of its all directions and anti-bending mechanics superior performance, in like product, reduce vertical transverse strength ratio; Another polypropylene PP mixed-powder can be according to the market demand of sheet material, carries out modification and fire-retardantly waits processing, meets the characteristic demand of fibre sheet material, and in the embryo felt, fiber is not subject to the damage of mechanical fixed network, mechanical strength, the expansion rate of raising fiber composite board.
The Automobile inside gadget prepared with this cluster fiber thermoplastic composite sheet and building sound-absorbing decoration, have advantages of that quality is light, intensity is high, expansion rate is high, sheet material vertical transverse strength ratio is little, sound-absorbing, heat insulation, environmental protection.
In sum, the present invention is that a kind of shear behavior improves, and the tension of all directions and anti-bending mechanics performance are strong, and expansion rate is high, and density is low, and quality intensity is high and have lightweight, humidity, nontoxic, a harmless cluster-shaped fiber thermoplastic composite sheet material.
The accompanying drawing explanation
Fig. 1 makes cluster-shaped fiber thermoplastic composite sheet material Whole Equipment figure.
Fig. 2 is that pneumatic dispersion-mixing-static adheres to, settles into the net arrangement structural representation.
Fig. 3 is along A-A line cut-away view in Fig. 2.
Fig. 4 is structural representation of the present invention;
Fig. 5 is 50 times of metallographs of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
From Fig. 1, Fig. 2 and Fig. 3, fiber dispersion, static, shear structure are: metal guide wheel and rubber tire 1, licker-in 2, directive wheel 3 and shearing break bar 4 are arranged in order rear docking cone bucket 5, and cone bucket 5 docks conveyance conduits 6;
Pneumatic dispersion-mixing-static adheres to, sheds, settles into net arrangement and comprises: a bottom is the tapered device that unsteady diffusing air current distributes and static distributes, its inner cone bucket 10 is provided with uniform rising diffusing air current spout 12 and 4 groups of electrostatic atomisers 13, inner cone bucket 10 is provided with jet 11,11 pairs of jets are connected to jet-stream wind entrance 7 and conveyance conduit 6, and outer cone bucket 9 is provided with the import 8 of the air-flow that floats;
A pneumatic dispersion mixing chamber 17 be connected with outer cone bucket 9, pneumatic dispersion mixing chamber 17 is provided with and stirs air-flow urceolus 16, the side direction that is provided with stirring air-flow urceolus 16 stirs and cuts air flow inlet 18, the clockwise side direction of being provided with pneumatic dispersion mixing chamber 17 stir cut air-flow spout 14 and counterclockwise side direction stir and cut air-flow spout 15, clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir and cut air-flow spout 15 each forms by four～six groups respectively, the side direction stirring is cut air-flow spout 14 and is cut air-flow spout 15 not in same plane with counterclockwise side direction stirring clockwise, pneumatic dispersion mixing chamber 17 axially on alternately arrange, clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir cut air-flow spout 15 along the drum shaft of pneumatic dispersion mixing chamber 17 to angle be 75～85 degree, the tangential angle of cylindrical shell circumference is 55～85 degree,
A transfer passage 21 be connected with pneumatic dispersion mixing chamber 17, unsteady gas plate 20 arranges along the bottom camber line of transfer passage 21, and along the mass transport direction, the uniform unsteady pore of 8～20 degree angle is arranged, and by unsteady gas plate 20, is provided with the air flow inlet 19 that floats;
A sedimentation mixing chamber 23 be connected with transfer passage 21 other ends, sedimentation mixing chamber 23 is provided with four groups of electrostatic dusting spouts 22, and bottom is for becoming net sedimentation bucket 24.
Become 24 outlets of net sedimentation bucket to being connected into net conveyer belt 25, become net conveyer belt 25 front ends to being connected to the first nonwoven running roller 28, become on net conveyer belt 25 and be provided with running roller 26 after each becomes net sedimentation bucket 24, become net conveyer belt 25 rear ends to being connected to dusting device 27, high-temperature baking device 29, glued membrane running roller 30, the second nonwoven running roller 34, composite roll 31, chill roll 32 and shearing knife 33.
Referring to Fig. 4 and Fig. 5, cluster-shaped fiber thermoplastic composite sheet material comprises sheet material upper surface layer 37, median fiber and mixed-powder base layer 35 and sheet material undersurface layer 36, and median fiber and mixed-powder base layer 35 are to adopt the following steps production method:
(1), fiber dispersion, static, shear: when non-twist fiber roving rolls by metal guide wheel and rubber tire 1, make it be with electrostatic charge 50～110KV, fibre bundle with electrostatic charge passes through licker-in 2 card wire combings, due to the combing with licker-in 2 that rolls that is subject to metal and rubber roll 1, further produce relative sliding between the monofilament of fibre bundle, loosen, disperse, after fibre bundle after dispersion and monofilament enter shearing break bar 4 by directive wheel 3, be sheared and become the filament that length is 10mm～150mm, fibre bundle after shearing drops in cone bucket 5, it is 5～20m that jet-stream wind entrance 7 passes into flow
3the delivery air of/h, now fibre bundle is because the suction function that is subject to delivery air is brought into conveyance conduit 6,
(2), pneumatic dispersion-mixing-static adheres to: the filament after shearing enters into the jet 11 of pneumatic dispersion mixing chamber 17 under the effect of delivery air via conveyance conduit 6, be subject to delivery air, the rising diffusing air current of rising diffusing air current spout 12, and organize more clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir and cut after side direction that air-flow spout 15 sprays stirs and cut the mutual shear action of air-flow, make the fibre bundle that enters into pneumatic dispersion mixing chamber 17 obtain fully disperseing to form cluster-shaped fiber and fibre single thread, the flow of the rising diffusing air current of rising diffusing air current spout 12 is 20～100m
3/ h, clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir the side direction of cutting air-flow spout 15 to stir the flow of cutting air-flow be 40～120m
3/ h, simultaneously, the cluster-shaped fiber disperseed and fibre single thread and 4 groups of electrostatic atomisers 13 spray into the mixed-powder that the particle diameter of electrostatic charge 50～110KV is 75 μ m～500 μ m and are issued to even the mixing and adhesion in the effect of electrostatic field, and the mass ratio of filament and mixed-powder is 70～80:20～30, cluster-shaped fiber after disperseing, mix, adhering to and fibre single thread are subject to ascending air and side direction to stir the effect that air-flow forms flow field of cutting, continuously by transfer passage 21, be delivered to and mix expansion chamber 23, the unsteady gas plate 20 that transfer passage 21 bottoms are provided with provides the gas that floats to provide unsteady power to cluster-shaped fiber and fibre single thread in transfer passage 21, and the flow of the air-flow of the gas plate 20 that floats is 10～60m
3/ h,
(3), mix and settle into net: cluster-shaped fiber and fibre single thread carry out the electrostatic mixed-powder by four groups of electrostatic dusting spouts 22 after entering and mixing expansion chamber 23, make it further adhere to a certain amount of mixed-powder, the mass ratio of fibre single thread and mixed-powder is 55～70:30～45; The cluster-shaped fiber that is stained with mixed-powder descends slowly and lightly in becoming net sedimentation bucket 24 with fibre single thread and mixed-powder under the effect in gravity and flow field, the cluster-shaped fiber that becomes net sedimentation bucket 24 will be stained with mixed-powder is deposited in on net conveyer belt 25 with fibre single thread and mixed-powder uniformly, successively the cluster-shaped fiber that is stained with mixed-powder of sedimentation and fibre single thread and mixed-powder have formed the mixed and disorderly unordered three-dimensional cluster-shaped fiber net of multiple-layer stacked, i.e. one fixed width, thickness, uniform cluster-shaped fiber and mixed-powder base layer 35;
(4), base felt dusting: evenly cluster-shaped fiber and mixed-powder base layer 35 are processed base felt surface by dusting device 27 dustings after running roller 26 typings, make its surface form 25g/m
2～45g/m
2the mixed-powder layer, to improve the flatness of plate surface, improve intensity quality and the apparent mass of composite board;
(5), baking composite setting: base felt that (4) step is formed completes hydrofuge, softening, melting, plasticizing through high-temperature baking device 29; Base felt after plasticizing is through composite roll 31, chill roll 32 composite settings; Then complete the shearing of compound, the shearing knife 33 of nonwoven that the nonwoven running roller 28 of sheet material provides, glued membrane that glued membrane running roller 30 provides, formation has some strength, the continuous cluster-shaped fiber thermoplastic composite sheet material of thickness, and the cluster-shaped glass fibre strengthens plastic composite board material.
Above-mentioned mixed-powder is polypropylene, polyethylene, polyvinyl chloride, polyester, calcium carbonate, talcum powder, kaolin or fire retardant filler.
Above-mentioned non-twist fiber roving is carbon fiber, glass fibre, flaxen fiber or wood-fibred.
Metal guide wheel and rubber tire 1, licker-in 2, the directive wheel 3 of roving glass fiber bundle by this device in this technique, shear break bar 4, be treated as necessarily fibre bundle and the monofilament of loose, fixed length, the fibre bundle of cut-out and monofilament by delivery air through conveyance conduit 6 and jet 11 to pneumatic dispersion mixing chamber 17, fibre bundle and monofilament stir in delivery air, rising diffusing air current, clockwise and counterclockwise side direction and cut air-flow, reach under the effect of static mixed-powder air-flow, the abundant dispersion that has completed fibre bundle forms cluster-shaped fiber, and reaches the adhesion that mixes of fibre single thread and static mixed-powder, mixing the glass fiber adhered to delivers to and mixes expansion chamber 23 through transfer passage 21, mix the cluster-shaped fiber and the filament that adhere to and pass through electrostatic dusting, make a certain amount of static mixed-powder of its progressive adhesion, adhere to static mixed-powder fibre single thread and static mixed-powder, under the effect of gravity and air velocity distribution, descend slowly and lightly in becoming net sedimentation bucket 24, become net sedimentation bucket 24 that the filament of mixing and mixed-powder are deposited in on net conveyer belt 25 uniformly, technology requirement according to product, by the pneumatic combining form that is dispersed into net arrangement of varying number, make one fixed width, thickness, the cluster-shaped fiber of the unordered disorder of fiber of surface density, fibre single thread, mixed-powder base felt, the base felt is through typing, dusting, nonwoven, baking, glued membrane, composite setting, cooling and shaping, shear, complete the operations such as the typing of the compound and sheet material of softening, melting, glued membrane, nonwoven, cooling, curing, shearing, be prepared into there is some strength, cluster-shaped glass fibre that thickness is continuous strengthens plastic composite board material.
The present invention compared with the prior art, because the sheet material medium-length fibre exists in thermoplastic sheets with the cluster-shaped form, its molding mode is an overall structure, unlike traditional product, by paved in multi-layers, formed, do the used time in lateral external forces, there are not the phenomenons such as delamination, lamellar spacing, layer and fault position, therefore its shear behavior is superior to like product; Secondly the fiber existence form has isotropism, therefore the tension of its all directions and anti-bending mechanics superior performance, in like product, reduce vertical transverse strength ratio; Another mixed-powder can be according to the market demand of sheet material, carry out modification and the processing such as fire-retardant, meet the characteristic demand of fibre sheet material, and in the embryo felt, fiber is not subject to the damage of mechanical fixed network, can also be by the fiber of every group of pneumatic stirring dispersing-web forming device of adjustment and the ratio of mixed-powder, form the combination of the sandwich structure of sheet material, improve the expansion rate of sheet material, reduce density, increase the quality of sheet material, this technological process simultaneously is simple, and equipment investment is few, energy consumption is low, environmental protection and easily form the advantages such as large-scale industrialized production.
The glass fibre that adopts this technique to prepare strengthens plastic composite board material, and after tested, the physical indexs such as this light weight board hot strength, stretch modulus, bending strength, bending modulus are superior.
By the following examples related content of the present invention is further illustrated.
Embodiment 1:
The diameter dimension of pneumatic dispersion mixing chamber 17 is 800mm, conveyance conduit 6 diameters be Ф 20mm, rising diffusing air current spout 12 diameter Ф 15mm, clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir the diameter of cutting air-flow spout 15 and be Ф 10mm.
Get the raw materials ready: alkali-free glass fibre 2400tex (roving, density 2.35g/cm
3, diameter 13 μ m), the glass fiber bundle sheared length is 50～75mm, 145#PP powder (density 0.91g/cm
3, 80 orders), the glue face adopts PP film 55g/ ㎡, nonwoven adopts the spunlace non-woven cloth 100g/ ㎡ (wherein PE film 45g/ ㎡, PET spunlace non-woven cloth 55g/ ㎡) that is compounded with PE glue face.
Glass delivery air speed is 4m/s, and rising diffusing air current speed is 3m/s, and it is 2.0m/s that side direction stirs the speed of cutting air-flow.
By the even base felt that settles into the mixed and disorderly unordered three-dimensional arrangement that net arrangement makes, the devices such as the base felt is compound through dusting, nonwoven, baking, glued membrane, composite roll, cooling and shaping, shearing, complete the operations such as the typing of the compound and sheet material of softening, melting, glued membrane, nonwoven, cooling, curing, shearing, the glass fibre be prepared into strengthens plastic composite board material, sheet material surface density 1570g/ ㎡, panel density 0.69g/cm
3, sheet metal thickness δ 3.2mm, after tested, plate stretch intensity 13.72Mpa, bending strength 10.97Mpa, elongation at break 3.12%.
Embodiment 2:
The diameter dimension of pneumatic dispersion mixing chamber 17 is 600mm, conveyance conduit 6 diameters be Ф 18mm, rising diffusing air current spout 12 diameter Ф 15mm, clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir the diameter of cutting air-flow spout 15 and be Ф 10mm.
Get the raw materials ready: alkali-free glass fibre 2400tex (roving, density 2.35g/cm
3, diameter 13 μ m), the glass fiber bundle sheared length is 50～75mm, 145#PP powder (density 0.91g/cm
3, 80 orders), polyethylene (PE) powder (density 0.95g/cm
3, 60 orders), the glue face adopts PP film 55g/ ㎡, nonwoven adopts needle punched non-woven fabrics 80g/ ㎡.
Glass delivery air speed is 5m/s, and rising diffusing air current speed is 4m/s, and it is 3m/s that side direction stirs the speed of cutting air-flow.
By the even base felt that settles into the mixed and disorderly unordered three-dimensional arrangement that net arrangement makes, the devices such as the base felt is compound through dusting, nonwoven, baking, glued membrane, composite roll, cooling and shaping, shearing, complete the operations such as the typing of the compound and sheet material of softening, melting, glued membrane, nonwoven, cooling, curing, shearing, the glass fibre be prepared into strengthens plastic composite board material, sheet material surface density 1550g/ ㎡, panel density 0.62g/cm
3, sheet metal thickness δ 3.0mm, after tested, plate stretch intensity 14.78Mpa, bending strength 12.68Mpa, elongation at break 2.96%.
Embodiment 3:
The diameter dimension of pneumatic dispersion mixing chamber 17 is 500mm, the diameter Ф 15mm that the glass pipe diameter is Ф 25mm, rising diffusing air current spout 12, clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir the diameter of cutting air-flow spout 15 and be Ф 8mm.
Get the raw materials ready: alkali-free glass fibre 2400tex (roving, density 2.35g/cm
3, diameter 13 μ m), the glass fiber bundle sheared length is 70～75mm, 145#PP powder (density 0.91g/cm3,80 orders), polyethylene (PE) powder (density 0.95g/cm
3, 60 orders), the glue face adopts PP film 55g/ ㎡, nonwoven adopts needle punched non-woven fabrics 80g/ ㎡.
Glass delivery air speed is 3.5m/s, and rising diffusing air current speed is 3m/s, and it is 2.5m/s that side direction stirs the speed of cutting air-flow.
By the even base felt that settles into the mixed and disorderly unordered three-dimensional arrangement that net arrangement makes, the devices such as the base felt is compound through dusting, nonwoven, baking, glued membrane, composite roll, cooling and shaping, shearing, complete the operations such as the typing of the compound and sheet material of softening, melting, glued membrane, nonwoven, cooling, curing, shearing, the glass fibre be prepared into strengthens plastic composite board material, sheet material surface density 1620g/ ㎡, panel density 0.58g/cm
3, sheet metal thickness δ 3.5mm, after tested, plate stretch intensity 15.16Mpa, bending strength 12.83Mpa, elongation at break 3.76%.
Embodiment 4:
Get the raw materials ready: alkali-free glass fibre 2400tex (roving, density 2.35g/cm
3, diameter 13 μ m), the glass fiber bundle sheared length is 60mm, 145# polypropylene PP powder (density 0.91g/cm
3, 80 orders), the mass ratio of glass and PP powder is 65:35.
Cluster-shaped fiber thermoplastic composite sheet material surface density 1570g/ ㎡ of the present invention, panel density 0.67g/cm
3, sheet metal thickness δ 3.2mm, after tested, sheet material transverse bending strength 13.08Mpa, sheet material longitudinal tensile strength 12.65Mpa; Sheet material transverse bending strength 8.10Mpa, sheet material buckling strength 9.08Mpa; Sheet material cures rear expansion rate 520%.
Embodiment 5:
Get the raw materials ready: alkali-free glass fibre 2400tex (roving, density 2.35g/cm
3, diameter 13 μ m), the glass fiber bundle sheared length is 55mm, 145#PP powder (density 0.91g/cm
3, 80 orders), the mass ratio of glass and PP powder is 63:37.
Cluster-shaped fiber thermoplastic composite sheet material surface density 1550g/ ㎡ of the present invention, panel density 0.72g/cm
3, sheet metal thickness δ 3.0mm, after tested, sheet material transverse bending strength 13.78Mpa, sheet material longitudinal tensile strength 12.67Mpa; Sheet material transverse bending strength 11.40Mpa, sheet material buckling strength 10.97Mpa; Sheet material cures rear expansion rate 580%.
Claims (5)
1. a cluster-shaped fiber thermoplastic composite sheet material, comprise sheet material upper surface layer (37), median fiber and mixed-powder base layer (35) and sheet material undersurface layer (36), it is characterized in that: described median fiber and mixed-powder base layer (35) are to adopt the following steps production method: the filament with the fixed length of upper electrostatic charge enters into the jet of pneumatic dispersion mixing chamber under the effect of delivery air via conveyance conduit, be subject to delivery air, the rising diffusing air current, and after organizing side direction more and stirring and to cut the mutual shear action of air-flow, make the filament that enters into pneumatic dispersion mixing chamber obtain fully disperseing to form cluster-shaped fiber and fibre single thread, simultaneously, cluster-shaped fiber and fibre single thread reach even with the mixed-powder sprayed into to be mixed and adhesion, and the mixed-powder sprayed into is with static, cluster-shaped fiber and fibre single thread are subject to ascending air and side direction to stir the effect that air-flow forms flow field of cutting, continuously by conveyance conduit, be delivered to the mixing expansion chamber, the cluster-shaped fiber that is stained with mixed-powder descends slowly and lightly in becoming net sedimentation bucket with fibre single thread and mixed-powder under the effect in gravity and flow field, the cluster-shaped fiber that becomes net sedimentation bucket will be stained with mixed-powder is deposited in on the net conveyer belt with fibre single thread and mixed-powder uniformly, successively the cluster-shaped fiber that is stained with mixed-powder of sedimentation and fibre single thread and mixed-powder have formed the mixed and disorderly unordered three-dimensional cluster-shaped fiber embryo felt of multiple-layer stacked, it is one fixed width, thickness, uniform cluster-shaped fiber and mixed-powder base layer (35).
2. cluster-shaped fiber thermoplastic composite sheet material according to claim 1, it is characterized in that: described mixed-powder is polypropylene, polyethylene, polyvinyl chloride or polyester.
3. cluster-shaped fiber thermoplastic composite sheet material according to claim 1 and 2, it is characterized in that: described median fiber is carbon fiber, glass fibre, flaxen fiber or wood-fibred.
4. cluster-shaped fiber thermoplastic composite sheet material according to claim 1 and 2, it is characterized in that: described fibre length is 10mm～150mm.
5. cluster-shaped fiber thermoplastic composite sheet material according to claim 1 and 2, it is characterized in that: in described median fiber and mixed-powder base layer, the mass ratio of cluster-shaped fiber and mixed-powder is 50～65:50～35.
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| CN105778334B (en) * | 2016-03-16 | 2018-04-03 | 南京航空航天大学 | A kind of glass fiber thermoplastic plastic granule and preparation method thereof |
| CN110048036A (en) * | 2019-04-19 | 2019-07-23 | 桑顿新能源科技有限公司 | Reinforcing rib piece and preparation method thereof, battery core and preparation method thereof and soft-package battery |
| CN114249038B (en) * | 2021-12-07 | 2023-05-05 | 南通中集翌科新材料开发有限公司 | Composite floor center sill and container |
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