CN102416717A - Production method of cluster-shaped fiber thermoplastic composite sheet material - Google Patents
Production method of cluster-shaped fiber thermoplastic composite sheet material Download PDFInfo
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- CN102416717A CN102416717A CN2011102068912A CN201110206891A CN102416717A CN 102416717 A CN102416717 A CN 102416717A CN 2011102068912 A CN2011102068912 A CN 2011102068912A CN 201110206891 A CN201110206891 A CN 201110206891A CN 102416717 A CN102416717 A CN 102416717A
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Abstract
The invention discloses a production method of a cluster-shaped fiber thermoplastic composite sheet material. By the adoption of technological processes such as pneumatic process, dispersion, mixing, adherence, settlement for web formation, dusting, baking, composite typing and the like, the length-cut fiber bundle is fully dispersed to form cluster-shaped fiber so as to raise the uniform effect of adhering fiber and mixed powders, reduce the content of the mixed powders in the base felt and improve the fiber orientation and fiber web structure in the base felt. As the product is formed into an integral structure, the shear behavior of the product in the invention is superior to that of products of the same kind. In addition, as the fiber form has isotropy, mechanical properties, such as tensile performance and bending resistance in each direction, of the product in the invention are superior to those of products of the same kind, and the longitudinal and transverse strength ratio is reduced. The fiber in the blank felt is not damaged by the machinery fixed network, thus raising expansion rate of the composite sheet material, reduce density and increase the strength quality of the cluster-shaped fiber composite sheet material.
Description
Technical field
The present invention relates to a kind of production method of fiber thermoplastic composite sheet material, particularly relate to the production method of a kind of clustered fiber thermoplastic composite sheet material.
Background technology
The glass fibre that automotive trim is commonly used both at home and abroad at present strengthens plastic composite board material (Glassmat reinforced thermoplastics), is called for short GMT sheet material.No matter be wet method and dry process; Fiber orientation in such sheet material obviously; The vertical transverse strength ratio that causes wet processing composite board fiber is all greater than 1: 2.2, and the vertical transverse strength ratio of dry process composite board fiber is all greater than 1: 1.5, and the combing acupuncture fiber base felt uniformity in the dry process is relatively poor; Irregularity is all 4%～7%; Because the difference of vertical transverse strength remains by increasing material unit are grammes per square metre height stretching gadget at present and realizes that the material reducing effect of lightweight is not remarkable; In addition because the basic felt of wet processing is the paper technology manufacturing through having improved; It replaces the water in traditional slurry with foam; Usually slurry plays and carries fiber and mineral filler is formed the fiber base felt, thereby this process equipment input is big, energy consumption is high, Industrial Wastewater Treatment is difficult; The basic felt of dry process is to make through the combing needling process of non-manufacturing process, thereby production process is more, and it is bigger that the quality of basic felt is influenced by operation, and each operation is prone to produce dust in the production, influences the pollution of employee's healthy and environment.
Other its preparation process are for example: the name of application on 03 08th, 2010 is called " a kind of production method of glass fibre reinforced thermoplastic sheet " (number of applying for a patent: 201010118786.9; Open notification number: CN101792552A, open date of declaration: patented technology 2010.08.04).This invention provides a kind of production method of glass fibre reinforced thermoplastic sheet; The technological process of production comprises: glass fibre unreels and dividing sinker, glass fibre soak into, dynamically powder adherence, cut that air-flow mixes, the baking composite setting; It is characterized in that non-twist glass fibre is through after unreeling dividing sinker; Glass fiber bundle behind the dividing sinker and glass monofilament are through infiltration, dynamic powder adherence; After dried, cut off, glass fiber bundle and glass monofilament are accomplished through the air-flow mixing chamber with polypropylene (PP) powder mixed airflow and are mixed equably, and mixed material gets into the air flow deflector dispersing chamber again; Make mixed material obtain down disperseing, become scattered about the basic felt of the unordered disorder of formation on the conveyer belt of bottom equably in the effect of cutting of swirling eddy.Owing to form the glass bundle after glass is uniformly dispersed in this technology; The glass monofilament that forms seldom; Thereby glass bundle and monofilament bag can not fully be disperseed under the effect of cutting of swirling eddy after attaching PP, causes in the sheet material voidage bigger, and the plate surface flatness is relatively poor; PP content of powder ratio can't reduce in the sheet material, and board cost is higher.
The name of 05 month 22 days calendar year 2001 application is called " the stirring-spraying fluidized bed and application in the preparation fibre reinforced composites " (number of applying for a patent: 01112947.6; Open notification number: CN1327905A, open date of declaration: patented technology 2001.12.26).This invention provides a kind of stirring-spraying fluidized bed and application in the preparation fibre reinforced composites; Its of technological process of production employing is stirring-spraying fluidized bed; With air as fluidizing agent, in fluid bed through fluidisation with stir to realize fully mixing of polymeric matrix and fiber, and be the monofilament of adsorpting polymerization thing matrix with the fibre bundle dispersion; To reach the abundant infiltration of glass silk and basal body interface, form basic felt through the enlarging separator.Glass all forms the glass bundle after disperseing in this technology; The glass monofilament that forms seldom; The length of glass fibre is 4～20mm, and the quality of glass fiber bundle is 30～40% in glass fibre and the substrate mixture, and the content of PP powder is 70～40%; The density of sheet material is bigger, but this art plate only can be used for the half hitch structure material of automotive trim.
Summary of the invention
Technical problem to be solved by this invention provides a kind of sheet material shear behavior that makes and improves; Increase the tension and the anti-bending mechanics performance of all directions of sheet material; Improve the expansion rate of composite board; Reduce density, the production method of group's clustered fiber thermoplastic composite sheet material of the intensity quality of increase composite board.
In order to solve the problems of the technologies described above; The production method of provided by the invention clustered fiber thermoplastic composite sheet material comprises (1), fiber shearing, (2), pneumatic dispersion-mixing-adhesion; (3), mixing settles into net; (4), basic felt dusting, (5), baking composite setting, described (1), fiber are sheared: fiber is sheared the filament that becomes fixed length;
Described (2), pneumatic dispersion-mixing-adhesion: the filament after the shearing enters into the jet of pneumatic dispersing and mixing chamber via conveyance conduit under the effect of delivery air; After being subjected to delivery air, rising dispersion air-flow and organizing the side direction stirring more cutting the mutual shear action of air-flow, the filament that enters into pneumatic dispersing and mixing chamber is fully disperseed to form cluster shape fiber and fibre single thread; Simultaneously, the cluster shape fiber of dispersion and fibre single thread evenly mix with the mixed-powder that sprays into and adhere to; Cluster shape fiber after disperseing, mix, adhering to and fibre single thread are stirred by ascending air and side direction and cut the effect that air-flow forms the flow field, continuously are delivered to the mixing expansion chamber by transfer passage;
Described (3), mixing settle into net: group's clustered fiber and fibre single thread get into and mix expansion chamber; The group's clustered fiber that is stained with mixed-powder descends slowly and lightly under the effect in gravity and flow field in becoming net sedimentation bucket with fibre single thread and mixed-powder; The group's clustered 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 group's clustered fiber that is stained with mixed-powder of sedimentation and fibre single thread and the mixed-powder three-dimensional that formed the chaotic that multilayer superposes is rolled into a ball clustered fiber embryo felt, promptly certain width, thickness, evenly roll into a ball the bulk basic felt of clustered fiber.
Described (1), fiber are sheared and to be achieved in that non-twist fiber roving rolled and to make it be with electrostatic charge simultaneously; The fibre bundle that has electrostatic charge is through the combing of licker-in card wire; Further generation is slided relatively, loosens, is disperseed between the monofilament of fibre bundle, and fibre bundle after the dispersion and monofilament are sheared the filament that becomes fixed length.
The fiber after the described dispersion and the sheared length of monofilament are 10mm～150mm.
In described step (2), the pneumatic dispersion-mixing-adhesion: the mixed-powder that sprays into has static.
In described step (2), the pneumatic dispersion-mixing-adhesion: the unsteady gas plate that the transfer passage bottom is provided with provides the gas that floats to group's clustered fiber in the transfer passage and fibre single thread unsteady power to be provided.
The flow of the air-flow of described unsteady gas plate is 10～60m
3/ h.
Described (3), mixing settle in the net: group's clustered fiber and fibre single thread spray the mixed-powder that static electrification is arranged after getting into and mixing expansion chamber.
In described step (2), the pneumatic dispersion-mixing-adhesion: the flow of described delivery air is 5～20m
3/ h; It is 20～100m that the rising of described pneumatic dispersing chamber disperses the flow of air-flow
3/ h.
In described step (2), the pneumatic dispersion-mixing-adhesion: it is 40～120m that the side direction of described pneumatic dispersing chamber stirs the flow of cutting air-flow
3/ h.
In described step (2), the pneumatic dispersion-mixing-adhesion: described side direction stirring is cut air-flow and is comprised that air-flow is cut in the clockwise stirring of side direction and counterclockwise stirring of side direction cut air-flow.
Electrostatic charge 50～110KV on the fiber band described in the above-mentioned steps (1).
Described mixed-powder is polypropylene, polyethylene, polyvinyl chloride, polyester, calcium carbonate, talcum powder, kaolin or fire retardant filler.
Described non-twist fiber roving is carbon fiber, glass fibre, flaxen fiber or wood-fibred.
Described mixed-powder particle diameter is 75 μ m～500 μ m.
In pneumatic dispersion-mixing-static adhesion process, the mass ratio of filament and mixed-powder is 70～80: 20～30 in the above-mentioned steps (2).
Step (3) mixing settles in the net processing, and the mass ratio of fibre single thread and mixed-powder is 55～70: 30～45.
Adopt the production method of group's clustered fiber thermoplastic composite sheet material of technique scheme; Owing to adopted fiber dispersion, static, shearing step; Behind the electrostatic charge, because of the band like charges repels each other, thereby making to produce between fibre single thread loosens and displacement on the fiber band; Roll the interaction of rubber roll, licker-in, air-flow in addition; Make between the monofilament of fibre bundle that further generation is slided relatively, loosens, disperseed, and cut fibre bundle and monofilament, thereby fibre bundle and the monofilament of loosening, disperseing is provided for step (2) according to the length that plate property requires to be cut into certain-length.
In pneumatic dispersion-mixing-static adhesion process step; It is indoor that fibre bundle that delivery air will loosen, disperse and monofilament are ejected into pneumatic dispersing and mixing; Fibre bundle and monofilament are disperseing in the process of air-flow operation with rising; Stir the shear action of cutting air-flow owing to be subjected to clockwise, the counterclockwise both direction of side direction, make fibre bundle fully disperseed to form cluster shape fiber; The mixed-powder that sprays into mouthful static that dusts when cluster shape fiber after the dispersion and fibre single thread move with air-flow is issued in the effect of electrostatic field and mixes and adhere to; Cluster shape fiber after disperseing, mix, adhering to and filament mixture act on because of the flow field that is subjected to ascending air and side direction to stir the common formation of cutting air-flow, will successively be sent to and be mixed into net arrangement by the gas plate that floats, transfer passage.
Mix and settle in the network process step; Requirement according to product technology; Cluster shape fiber that mixing adheres to and filament are by the electrostatic dusting zone time; Make it further adhere to a certain amount of mixed-powder; The fibre single thread and the mixed-powder that adhere to mixed-powder descend slowly and lightly under the acting in conjunction of gravity and air velocity distribution in becoming net sedimentation bucket; Become net sedimentation bucket that filament and the mixed-powder that mixes is deposited in on the net conveyer belt uniformly; Successively the fiber of sedimentation and polypropylene powder have formed the three-dimensional cluster shape fiber embryo felt of the chaotic of multilayer stack, make certain width; Thickness; The fiber of the unordered disorder of fiber of surface density; Mixed-powder base felt; There is less damage in this system to fiber; Fibre bundle disperses effective; And the orientation disorder of fiber is disorderly; The vertical and horizontal intensity indifference of sheet material after the moulding; The fiber irregularity of sheet forming is all 1%～2%, and fibre single thread can be controlled to be 55～70: 30～45 with the mass ratio that adheres to mixed-powder in the basic felt of one-tenth net; Need not realize that lightweight material reducing effect is remarkable by increasing material unit are grammes per square metre to height stretching gadget, sheet material and processing cost are all lower.
In the base felt dusting processing step, comprise the moulding leftover pieces of producing sheet material in the mixture, the cotton-shaped material classified, that fragmentation is processed into, feed back addition are 10～30%, and the leftover bits rubbish that is produced in the automotive trim production can obtain recycling.
The present invention is directed to existing technology makes fiber become to net not enough and plate defect that cause with equipment; Through adopting a kind of pneumatic, dispersion, mixing, static to adhere to, settle into technological processes such as net, dusting, baking, composite setting, make the long fibre bundle of cutting disperseed the group's of formation clustered fiber fully, improve the even effect of fiber and mixed-powder adhesion; Reduce the content of mixed-powder in the basic felt; Improve the orientation and the fibre net structure of fiber in the basic felt,, make sheet material form the combination of sandwich structure simultaneously through the every group of pneumatic dispersion-fiber of one-tenth net arrangement of adjustment and the ratio of mixed-powder; Because the sheet material medium-length fibre exists in the thermoplastic sheets with group's bunch shape form; Its molding mode is an overall structure, is made up of paved in multi-layers unlike traditional product, does the time spent in lateral external forces; There are not phenomenons such as delamination, lamellar spacing, layer and fault position, so its shear behavior is superior to like product; Secondly the fiber existence form has isotropism, so the tension of its all directions and anti-bending mechanics superior performance in like product, reduce vertical transverse strength ratio; In addition mixed-powder can be according to the market demand of sheet material, carries out modification and processing such as fire-retardant, satisfies the characteristic demand of fibre sheet material; And fiber does not receive the damage of mechanical fixed network in the embryo felt; Improve the expansion rate of composite board, reduced density, increased the intensity quality of composite board.
Technological process of the present invention is simple, and equipment investment is few, and energy consumption is low, when the solution wet processing exists contaminated wastewater defective and dry process to have the pollution defect problem of dust, is easy to form large-scale industrialized production.
Description of drawings
Fig. 1 is the group's of making clustered fiber thermoplastic composite sheet material equipment overall diagram.
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 among Fig. 2.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described further.
Visible by Fig. 1, Fig. 2 and Fig. 3, metal guide wheel and rubber tire 1, licker-in 2, directive wheel 3 and shearing break bar 4 are arranged in order back butt joint awl bucket 5, bore bucket 5 butt joint conveyance conduits 6;
A bottom is the tapered unsteady dispersed gas distributions and the device of static distribution; Its inner cone bucket 10 is provided with the rising that is uniformly distributed with and disperses air-flow 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 inlet 7 and conveyance conduit 6, and outer cone bucket 9 is provided with the import 8 of the air-flow that floats;
A pneumatic dispersing and mixing chamber 17 that is connected with outer cone bucket 9; Pneumatic dispersing and mixing chamber 17 is provided with stirs air-flow urceolus 16; The side direction that is provided with stirring air-flow urceolus 16 stirs and cuts air flow inlet 18; Pneumatic dispersing and mixing chamber 17 is provided with clockwise side direction and stirs and cut air-flow spout 14 and stir with side direction counterclockwise and cut air-flow spout 15; Clockwise side direction stirs and cuts air-flow spout 14 and side direction counterclockwise and stir and cut air-flow spout 15 each is formed 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 dispersing and mixing chamber 17 axially on alternately be provided with, clockwise side direction stir cut air-flow spout 14 and side direction counterclockwise stir cut air-flow spout 15 along the drum shaft of pneumatic dispersing and mixing chamber 17 to angle be 75～85 degree, cylindrical shell circumference tangential angle is 55～85 degree;
A transfer passage 21 that is connected with pneumatic dispersing and mixing chamber 17, unsteady gas plate 20 is provided with along the bottom camber line of transfer passage 21, and along the unsteady pore that the mass transport direction has 8～20 degree angles to be uniformly distributed with, is provided with the air flow inlet 19 that floats by unsteady gas plate 20;
A sedimentation mixing chamber 23 that is connected with transfer passage 21 other ends, sedimentation mixing chamber 23 is provided with four groups of electrostatic dusting spouts 22, and the bottom is for becoming to net sedimentation bucket 24.
Become 24 outlets of net sedimentation bucket to being connected into net conveyer belt 25; Net conveyer belt 25 front ends are to being connected to the first nonwoven running roller 28; Become on the net conveyer belt 25 after each becomes net sedimentation bucket 24, to be provided with running roller 26, become net conveyer belt 25 rear ends 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.
The production method of group's clustered fiber thermoplastic composite sheet material, adopt following steps:
(1), fiber dispersion, static, shearing: when non-twist fiber roving rolls through metal guide wheel and rubber tire 1, make it be with electrostatic charge; The fibre bundle that has electrostatic charge is through licker-in 2 card wire combings; Owing to receive the combing with licker-in 2 that rolls of metal and rubber roll 1; Further generation is slided relatively, loosens, is disperseed between the monofilament of fibre bundle, and after fibre bundle after the dispersion and monofilament got into shearing break bars 4 through directive wheel 3, being sheared became the filament that length is 10mm～150mm; Fibre bundle after the shearing drops in the awl bucket 5, and it is 5～20m that jet-stream wind inlet 7 feeds flow
3The delivery air of/h, this moment, fibre bundle was brought into conveyance conduit 6 owing to receive the suction function of delivery air;
(2), pneumatic dispersion-mixing-static adheres to: the filament after the shearing enters into the jet 11 of pneumatic dispersing and mixing chamber 17 via conveyance conduit 6 under the effect of delivery air; Receive delivery air, rise to disperse the rising of air-flow spout 12 to disperse air-flow and organize more clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir cut side direction that air-flow spout 15 sprays stir cut the mutual shear action of air-flow after; Make the fibre bundle that enters into pneumatic dispersing and mixing chamber 17 fully disperseed the group's of formation clustered fiber and fibre single thread, it is 20～100m that the rising of the dispersion air-flow spout 12 that rises disperses the flow of air-flow
3/ h, clockwise side direction stirs and cuts air-flow spout 14 and side direction counterclockwise and 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 particle diameter that group's clustered fiber that disperses and fibre single thread and 4 groups of electrostatic atomisers 13 spray into electrostatic charge 50～110KV is that the mixed-powder of 75 μ m～500 μ m is 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; Group's clustered fiber after disperseing, mix, adhering to and fibre single thread receive ascending air and side direction to stir the effect that air-flow forms the flow field of cutting; Continuously be delivered to and mix expansion chamber 23 through transfer passage 21; The unsteady gas plate 20 that transfer passage 21 bottoms are provided with provides the gas that floats to group's clustered fiber and fibre single thread in the transfer passage 21 unsteady power to be provided, and the flow of the air-flow of the gas plate 20 that floats is 10～60m
3/ h;
(3), mixing settles into net: group's clustered fiber and fibre single thread entering mixing expansion chamber 23 backs are carried out static by four groups of electrostatic dusting spouts 22 and are sprayed mixed-powder; 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 group's clustered fiber that is stained with mixed-powder descends slowly and lightly under the effect in gravity and flow field in becoming net sedimentation bucket 24 with fibre single thread and mixed-powder; The group's clustered fiber that becomes net sedimentation bucket 24 will be stained with mixed-powder is deposited in on the net conveyer belt 25 with fibre single thread and mixed-powder uniformly; Successively the group's clustered fiber that is stained with mixed-powder of sedimentation and fibre single thread and the mixed-powder three-dimensional that formed the chaotic that multilayer superposes is rolled into a ball clustered fiber embryo felt, promptly certain width, thickness, evenly roll into a ball the bulk basic felt of clustered fiber;
(4), basic felt dusting: become the bulk basic felt of even clustered fiber of net after running roller 26 typings, to handle basic felt surface, make its surface form 25g/m through dusting device 27 dustings
2～45g/m
2The mixed-powder layer to improve the flatness of plate surface, improves the intensity quality and the apparent mass of composite board;
(5), baking composite setting: the basic felt that step (4) is formed is accomplished hydrofuges, softening, fusion, plasticizing through high-temperature baking device 29; Basic felt after the plasticizing is through composite roll 31, chill roll 32 composite settings; Accomplish 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 then; Formation has certain intensity, the continuous group's clustered fiber thermoplastic composite sheet material of thickness, and promptly 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.
The metal guide wheel of roving glass fiber bundle by this device and rubber tire 1, licker-in 2, directive wheel 3, shearing break bar 4 in this technology; Be treated as fibre bundle and monofilament necessarily loose, fixed length, the fibre bundle of cut-out and monofilament by delivery air through conveyance conduit 6 and jet 11 to pneumatic dispersing and mixing chamber 17; Fibre bundle and monofilament stir in delivery air, the dispersion air-flow that rises, clockwise and counterclockwise side direction and cut air-flow, reach under the effect of static mixed-powder air-flow; The abundant dispersion of having accomplished fibre bundle forms cluster shape fiber, and reaches the adhesion that mixes of fibre single thread and static mixed-powder; Mix the glass fiber that adheres to and deliver to mixing expansion chamber 23 through transfer passage 21; Mix the cluster shape 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 filament and mixed-powders to be deposited in into uniformly on the net conveyer belt 25 with mixing; Technology requirement according to product; By the pneumatic combining form that is dispersed into net arrangement of varying number, make certain width; Thickness; The cluster shape 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; Accomplish the operations such as typing, cooling, curing, shearing of the compound and sheet material of softening, fusion, glued membrane, nonwoven, be prepared into have certain intensity, glass fibre that thickness is continuous strengthens plastic composite board material.
The present invention compares with existing technology; Because the sheet material medium-length fibre exists in the thermoplastic sheets with group's bunch shape form; Its molding mode is an overall structure, is made up of paved in multi-layers unlike traditional product, does the time spent in lateral external forces; There are not phenomenons such as delamination, lamellar spacing, layer and fault position, so its shear behavior is superior to like product; Secondly the fiber existence form has isotropism, so the tension of its all directions and anti-bending mechanics superior performance in like product, reduce vertical transverse strength ratio; In addition mixed-powder can be according to the market demand of sheet material, carries out modification and processing such as fire-retardant, satisfies the characteristic demand of fibre sheet material; And fiber does not receive the damage of mechanical fixed network in the embryo felt, can also form the combination of the sandwich structure of sheet material through the every group of pneumatic dispersed with stirring-fiber of one-tenth net arrangement of adjustment and the ratio of mixed-powder; Improve the expansion rate of sheet material, reduce density, increase the quality of sheet material; This technological process is simple simultaneously; Equipment investment is few, and energy consumption is low, advantages such as environmental protection and easy formation large-scale industrialized production.
Adopt the glass fibre of this prepared to strengthen plastic composite board material, through test, physical indexs such as this light weight board hot strength, stretch modulus, bending strength, bending modulus are superior.
Below through embodiment related content of the present invention is further specified.
Embodiment 1:
The diameter dimension of pneumatic dispersing and mixing chamber 17 is 800mm, conveyance conduit 6 diameters are Φ 20mm, rise to disperse air-flow spout 12 diameter of phi 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 Φ 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/m
2, nonwoven adopts the spunlace non-woven cloth 100g/m that is compounded with PE glue face
2(PE film 45g/m wherein
2, PET spunlace non-woven cloth 55g/m
2).
Glass delivery air speed is 4m/s, and the dispersion air velocity that rises is 3m/s, and it is 2.0m/s that side direction stirs the speed of cutting air-flow.
By the even basic felt that settles into the chaotic three-dimensional arrangement that net arrangement processes; Devices such as the base felt is compound through dusting, nonwoven, baking, glued membrane, composite roll, cooling and shaping, shearing; Accomplish the operations such as typing, cooling, curing, shearing of the compound and sheet material of softening, fusion, glued membrane, nonwoven; The glass fibre that is prepared into strengthens plastic composite board material, sheet material surface density 1570g/m
2, panel density 0.69g/cm
3, sheet metal thickness δ 3.2mm, through the test, sheet material hot strength 13.72Mpa, bending strength 10.97Mpa, elongation at break 3.12%.
Embodiment 2:
The diameter dimension of pneumatic dispersing and mixing chamber 17 is 600mm, conveyance conduit 6 diameters are Φ 18mm, rise to disperse air-flow spout 12 diameter of phi 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 Φ 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/m
2, nonwoven adopts needle punched non-woven fabrics 80g/m
2
Glass delivery air speed is 5m/s, and the dispersion air velocity that rises is 4m/s, and it is 3m/s that side direction stirs the speed of cutting air-flow.
By the even basic felt that settles into the chaotic three-dimensional arrangement that net arrangement processes; Devices such as the base felt is compound through dusting, nonwoven, baking, glued membrane, composite roll, cooling and shaping, shearing; Accomplish the operations such as typing, cooling, curing, shearing of the compound and sheet material of softening, fusion, glued membrane, nonwoven; The glass fibre that is prepared into strengthens plastic composite board material, sheet material surface density 1550g/m
2, panel density 0.62g/cm
3, sheet metal thickness δ 3.0mm, through the test, sheet material hot strength 14.78Mpa, bending strength 12.68Mpa, elongation at break 2.96%.
Embodiment 3:
The diameter dimension of pneumatic dispersing and mixing chamber 17 is 500mm, the glass pipe diameter is Φ 25mm, rise to disperse the diameter of phi 15mm of air-flow 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 Φ 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/cm
3, 80 orders), polyethylene (PE) powder (density 0.95g/cm
3, 60 orders), the glue face adopts PP film 55g/m
2, nonwoven adopts needle punched non-woven fabrics 80g/m
2
Glass delivery air speed is 3.5m/s, and the dispersion air velocity that rises is 3m/s, and it is 2.5m/s that side direction stirs the speed of cutting air-flow.
By the even basic felt that settles into the chaotic three-dimensional arrangement that net arrangement processes; Devices such as the base felt is compound through dusting, nonwoven, baking, glued membrane, composite roll, cooling and shaping, shearing; Accomplish the operations such as typing, cooling, curing, shearing of the compound and sheet material of softening, fusion, glued membrane, nonwoven; The glass fibre that is prepared into strengthens plastic composite board material, sheet material surface density 1620g/m
2, panel density 0.58g/cm
3, sheet metal thickness δ 3.5mm, through the test, sheet material hot strength 15.16Mpa, bending strength 12.83Mpa, elongation at break 3.76%.
Claims (10)
1. the production method of group's clustered fiber thermoplastic composite sheet material comprises (1), fiber shearing, (2), pneumatic dispersion-mixing-adhesion, and (3), mixing settle into net, (4), basic felt dusting, (5), baking composite setting is characterized in that:
Described (1), fiber are sheared: fiber is sheared the filament that becomes fixed length;
Described (2), pneumatic dispersion-mixing-adhesion: the filament after the shearing enters into the jet of pneumatic dispersing and mixing chamber via conveyance conduit under the effect of delivery air; After being subjected to delivery air, rising dispersion air-flow and organizing the side direction stirring more cutting the mutual shear action of air-flow, the filament that enters into pneumatic dispersing and mixing chamber is fully disperseed to form cluster shape fiber and fibre single thread; Simultaneously, the cluster shape fiber of dispersion and fibre single thread evenly mix with the mixed-powder that sprays into and adhere to; Cluster shape fiber after disperseing, mix, adhering to and fibre single thread are stirred by ascending air and side direction and cut the effect that air-flow forms the flow field, continuously are delivered to the mixing expansion chamber by transfer passage;
Described (3), mixing settle into net: group's clustered fiber and fibre single thread get into and mix expansion chamber; The group's clustered fiber that is stained with mixed-powder descends slowly and lightly under the effect in gravity and flow field in becoming net sedimentation bucket with fibre single thread and mixed-powder; The group's clustered 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 group's clustered fiber that is stained with mixed-powder of sedimentation and fibre single thread and the mixed-powder three-dimensional that formed the chaotic that multilayer superposes is rolled into a ball clustered fiber embryo felt, promptly certain width, thickness, evenly roll into a ball the bulk basic felt of clustered fiber.
2. the production method of according to claim 1 clustered fiber thermoplastic composite sheet material; It is characterized in that: described (1), fiber are sheared and to be achieved in that non-twist fiber roving rolled and to make it be with electrostatic charge simultaneously; The fibre bundle that has electrostatic charge is through the combing of licker-in card wire; Further generation is slided relatively, loosens, is disperseed between the monofilament of fibre bundle, and fibre bundle after the dispersion and monofilament are sheared the filament that becomes fixed length.
3. the production method of according to claim 1 and 2 clustered fiber thermoplastic composite sheet material is characterized in that: the fiber after the described dispersion and the sheared length of monofilament are 10mm～150mm.
4. the production method of according to claim 1 and 2 clustered fiber thermoplastic composite sheet material is characterized in that: in described step (2), the pneumatic dispersion-mixing-adhesion: the mixed-powder that sprays into has static.
5. the production method of according to claim 1 and 2 clustered fiber thermoplastic composite sheet material is characterized in that: in described step (2), the pneumatic dispersion-mixing-adhesion: the unsteady gas plate that the transfer passage bottom is provided with provides the gas that floats to group's clustered fiber in the transfer passage and fibre single thread unsteady power to be provided.
6. the production method of according to claim 5 clustered fiber thermoplastic composite sheet material is characterized in that: the flow of the air-flow of described unsteady gas plate is 10～60m
3/ h.
7. the production method of according to claim 1 and 2 clustered fiber thermoplastic composite sheet material is characterized in that: described (3), mixing settle in the net: group's clustered fiber and fibre single thread spray the mixed-powder that static electrification is arranged after getting into and mixing expansion chamber.
8. the production method of according to claim 1 and 2 clustered fiber thermoplastic composite sheet material is characterized in that: in described step (2), the pneumatic dispersion-mixing-adhesion: the flow of described delivery air is 5～20m
3/ h; It is 20～100m that the rising of described pneumatic dispersing chamber disperses the flow of air-flow
3/ h.
9. the production method of according to claim 1 and 2 clustered fiber thermoplastic composite sheet material is characterized in that: in described step (2), the pneumatic dispersion-mixing-adhesion: it is 40～120m that the side direction of described pneumatic dispersing chamber stirs the flow of cutting air-flow
3/ h.
10. the production method of according to claim 1 and 2 clustered fiber thermoplastic composite sheet material is characterized in that: in described step (2), the pneumatic dispersion-mixing-adhesion: described side direction stirring is cut air-flow and is comprised that air-flow is cut in the clockwise stirring of side direction and counterclockwise stirring of side direction cut air-flow.
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| CN106367885A (en) * | 2016-08-31 | 2017-02-01 | 芜湖利通新材料有限公司 | Process for producing sound isolating cotton felt |
| CN106409525A (en) * | 2016-10-11 | 2017-02-15 | 中国科学院山西煤炭化学研究所 | Preparation method of graphene and conductive fiber composite material and hierarchical porous carbon composite material, and product and application thereof |
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| CN103612424A (en) * | 2013-11-19 | 2014-03-05 | 大连天禄新材料有限公司 | Carbon fiber and hemp fiber composite board with flame-retardant function and manufacturing process of carbon fiber and hemp fiber composite board |
| CN106367885A (en) * | 2016-08-31 | 2017-02-01 | 芜湖利通新材料有限公司 | Process for producing sound isolating cotton felt |
| CN106409525A (en) * | 2016-10-11 | 2017-02-15 | 中国科学院山西煤炭化学研究所 | Preparation method of graphene and conductive fiber composite material and hierarchical porous carbon composite material, and product and application thereof |
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| CN112677511A (en) * | 2019-10-17 | 2021-04-20 | 三菱重工业株式会社 | Composite material with reinforcing fiber bundle and bolt connection structure |
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| CN112661524A (en) * | 2020-12-21 | 2021-04-16 | 山东工业陶瓷研究设计院有限公司 | Mullite fiber reinforced quartz ceramic composite material and preparation method thereof |
| CN114290524A (en) * | 2021-12-03 | 2022-04-08 | 东华大学 | Device for dispersing bunched fibers into single fibers |
| CN114290524B (en) * | 2021-12-03 | 2024-03-26 | 东华大学 | Device for dispersing bundled fibers into single fibers |
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