CN212555292U - Chopped fiber reinforced thermoplastic prepreg fabric structure - Google Patents
Chopped fiber reinforced thermoplastic prepreg fabric structure Download PDFInfo
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- CN212555292U CN212555292U CN202020272430.XU CN202020272430U CN212555292U CN 212555292 U CN212555292 U CN 212555292U CN 202020272430 U CN202020272430 U CN 202020272430U CN 212555292 U CN212555292 U CN 212555292U
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Abstract
The utility model relates to a chopped fiber reinforced thermoplastic prepreg fabric structure, the main body reinforced fabric layer of the fabric is prepared by adopting high-performance carbon fiber filament bundles which are arranged in one direction, and the chopped fibers with liquid bonding emulsion are pasted and covered outside the carbon fiber filament bundles in a spraying mode, so as to assemble and fix the carbon fiber monofilaments which are arranged in one-way spread yarns, and finally, a bundled chopped fiber layer is formed outside the unidirectional carbon fiber filament bundle layer; and then, adhering a chopped fiber reinforced thermoplastic resin adhesive film to the surface of the carbon fiber unidirectional fabric layer to form the prepreg fabric with the chopped fiber reinforced thermoplastic resin film laminated structure. The fabric adopts a structure that short fibers are pasted and covered with unidirectional long-tow carbon fibers to ensure that the fiber monofilaments do not slide subsequently in the yarn spreading process; and then, the chopped fibers are doped in the thermoplastic resin film matrix, so that the tensile strength and the ductility and toughness of the resin matrix film are improved, and the film stability and the tensile resistance in the preparation process of the pre-impregnated fabric are effectively ensured.
Description
Technical Field
The utility model belongs to high performance fiber thermoplasticity preimpregnation fabric structure, in particular to adopt short mixed reinforcing thermoplastic resin film of fibre to be the thermoplasticity carbon fiber preimpregnation fabric structure that matrix composite filament bundle carbon fiber prepared.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
The thermoplastic prepreg fabric is an important intermediate product in the forming process of the high-performance fiber composite material, the amount of resin impregnated in the fiber fabric can be well controlled, the infiltration effect and uniformity of the resin in the fiber fabric are ensured, and the stability guarantee is provided for the subsequent preparation of the high-performance fiber composite material. The existing high-performance fiber prepreg fabric is a product mainly researched and developed by taking a thermoplastic prepreg fabric of carbon fibers as a key point, and mainly adopts an emulsion impregnation method, a hot-melt impregnation method, a fluidized bed impregnation method and mixed application of various different methods, different fiber prepreg technologies have advantages and different problems, wherein the main difficulty is the problem of infiltration between fibers and resin, in addition, in the process of unidirectional fiber arrangement and yarn spreading of the prepreg fabric, the problem of slippage between monofilament fibers in the subsequent process after yarn spreading also exists, which can cause the problem of instability between yarns of the prepreg fabric and even broken filaments and fuzz, and cause the instability of various performances of a composite material prepared by adopting the prepreg fabric. Meanwhile, in order to solve the problems of solvent volatilization, unstable impregnation effect and the like in the process of impregnating fibers with liquid-phase matrix resin, developers increasingly adopt film-shaped resin as a matrix to prepare hot-melt thermoplastic fabrics, and in the preparation process, the inventors find that: the resin adhesive film matrix has weak self-stretching performance, and the problems of tensile fracture or tensile offset and the like of the adhesive film are easy to occur in the online preparation process.
Disclosure of Invention
In order to overcome the problems, the utility model provides a preparation structure of chopped fiber reinforced thermoplastic prepreg fabric, the main body reinforced fabric layer of the fabric is prepared by adopting high-performance carbon fiber filament bundles arranged in one direction, and the chopped fibers with liquid bonding emulsion are attached to the outside of the carbon fiber filament bundles in a spraying mode, so as to assemble and fix the carbon fiber monofilaments arranged in unidirectional spread yarns and finally form a chopped fiber layer outside the unidirectional carbon fiber filament bundles; and then, adhering a chopped fiber reinforced thermoplastic resin adhesive film to the surface of the carbon fiber unidirectional fabric layer to form the prepreg fabric with the chopped fiber reinforced thermoplastic resin film laminated structure.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model discloses a first aspect provides a short fibre reinforcement thermoplasticity preimpregnation fabric structure cuts, includes: one-way carbon fiber fabric layer (1), chopped strand fiber bundling layer (2), chopped strand fiber reinforced thermoplastic resin glue film (4), chopped strand fiber bundling layer (2) is attached to one-way carbon fiber fabric layer (1) outside, chopped strand fiber reinforced thermoplastic resin glue film (4) attached in chopped strand fiber bundling layer (2) outside.
The principle of the utility model is that: the fabric adopts a structure that short fibers are pasted and covered with unidirectional long-tow carbon fibers to ensure that the fiber monofilaments do not slide subsequently in the yarn spreading process; and then, the chopped fibers are doped in the thermoplastic resin film matrix, so that the tensile strength and the ductility toughness of the resin matrix film are improved, the adhesive film stability and the tensile resistance in the preparation process of the pre-impregnated fabric are effectively ensured, and the product quality of the pre-impregnated fabric is ensured.
The second aspect of the present invention provides a method for preparing a chopped fiber reinforced thermoplastic prepreg fabric structure, comprising:
preparing a main body reinforcing fabric layer of the fabric by adopting the carbon fiber filament bundles arranged in a unidirectional mode;
the method comprises the following steps of (1) coating chopped fibers with liquid bonding emulsion on the outer part of a carbon fiber filament bundle in a spraying mode, and forming a chopped fiber layer on the outer part of the carbon fiber filament bundle;
and adhering a chopped fiber reinforced thermoplastic resin adhesive film to the surface of the chopped fiber layer to form the prepreg fabric with the chopped fiber reinforced thermoplastic resin film laminated structure.
The operation method is simple, low in cost, high in practicability and easy for large-scale production.
The third aspect of the present invention provides the use of any one of the above chopped fiber reinforced thermoplastic prepreg fabric structures in the preparation of high performance fiber composites.
The chopped fiber reinforced thermoplastic prepreg fabric prepared by the method avoids slippage among monofilament fibers, and the tensile strength and the ductility and toughness of the resin matrix film are improved, so that the preparation requirements of the existing high-performance fiber composite material can be met.
The beneficial effects of the utility model reside in that:
(1) the fabric of the utility model firstly adopts the arrangement structure that the chopped fiber is pasted and covered with the unidirectional long-tow carbon fiber to ensure that the subsequent slippage between the fiber monofilaments is not generated in the yarn spreading process; and then, the chopped fibers are doped in the thermoplastic resin film matrix, so that the tensile strength and the ductility toughness of the resin matrix film are improved, the adhesive film stability and the tensile resistance in the preparation process of the pre-impregnated fabric are effectively ensured, and the product quality of the pre-impregnated fabric is ensured.
(2) The operation method is simple, low in cost, high in practicability and easy for large-scale production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural diagram of a chopped fiber reinforced thermoplastic prepreg fabric in example 1 of the present application, wherein 1 is a unidirectional carbon fiber fabric layer, 2 is a chopped fiber bundle layer, 3 is a reinforced chopped fiber, and 4 is a chopped fiber reinforced thermoplastic resin adhesive film.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present application, EVA refers to "ethylene-vinyl acetate copolymer".
PE fibers refer to ultra high molecular weight polyethylene fibers.
PO fibers refer to polyolefin fibers.
PPS fibers refer to polyphenylene sulfide fibers.
A main body reinforcing fabric layer of the fabric is prepared from high-performance unidirectional carbon fiber filament bundles, wherein the outside of the carbon fiber filament bundles is coated with chopped fibers with liquid bonding emulsion in a spraying mode to assemble and fix carbon fiber monofilaments arranged in unidirectional spreading, and finally a chopped fiber layer is formed outside the unidirectional carbon fiber filament bundles; and then, adhering a chopped fiber reinforced thermoplastic resin adhesive film to the surface of the carbon fiber unidirectional fabric layer to form the prepreg fabric with the chopped fiber reinforced thermoplastic resin film laminated structure.
A chopped strand reinforced thermoplastic prepreg fabric preparation structure comprising: the unidirectional carbon fiber fabric layer, the chopped fiber soaked in the liquid bonding emulsion and the thermoplastic resin adhesive film are sequentially arranged; the unidirectional carbon fiber fabric layer, the chopped fiber soaked in the liquid bonding emulsion and the thermoplastic resin adhesive film are sequentially arranged from bottom to top;
in some embodiments, the thermoplastic resin adhesive film is a chopped fiber reinforced thermoplastic resin adhesive film, belongs to a fiber reinforced thermoplastic composite material, and can be prepared by a conventional method such as a solution impregnation method, a melt impregnation method, a powder impregnation method, a film lamination method, a blending method and the like, or a commercially available product.
The main body reinforced fabric layer adopts a high-performance carbon fiber unidirectional arrangement structure, the used carbon fibers can be selected from any one or more of T300, T700, T800, T1000, M40, M60, M40J and M60J, the mixing proportion of the unidirectional carbon fibers is flexibly mastered according to the performance design requirement of the pre-impregnated fabric, and the gram weight of the carbon fiber unidirectional fabric is controlled to be 50-200g/M2。
The chopped fiber used on the surface of the carbon fiber filament bundle can be any one of the above types of carbon fiber or glass fiber, basalt fiber, aramid fiber and the like. The length of the chopped fiber is between 5 and 20mm, the surface of the chopped fiber is impregnated by thermoplastic emulsion, the emulsion can be any one of polyurethane, polyolefin, EVA and the like, and the solid content of the emulsion is controlled between 40 and 60 percent.
After the chopped fibers are soaked in the emulsion, the chopped fibers are sprayed on the surfaces of two sides of the spread carbon fiber unidirectional fabric in a spraying mode, the spraying pressure is controlled to be 0.5-2MPa, and the spraying thickness is controlled to be 0.1-1 mm. And drying the surface of the sprayed unidirectional fabric, wherein the specific drying temperature and drying time are flexibly adjusted according to design requirements.
The chopped fiber reinforced thermoplastic resin adhesive film is attached to the surface of the carbon fiber unidirectional fabric layer with the chopped fiber spraying layer, the thickness of the thermoplastic resin adhesive film is controlled within the range of 0.5-2mm and can be flexibly adjusted, and the thermoplastic resin adhesive film can be prepared from any one of polyamide, polyether ketone, polyether ether ketone, polyurethane, polyethylene, polyolefin resin and the like.
The length of the reinforced chopped fibers of the chopped fiber reinforced thermoplastic resin adhesive film is controlled to be between 5 and 20mm, any one of aramid fibers, PE fibers, PO fibers, PPS fibers, glass fibers and the like can be selected and is not limited to the above types, and the final fiber doping ratio is controlled to be within the range of 2 to 10 percent.
The chopped fiber reinforced thermoplastic resin adhesive film is attached to the surface of the carbon fiber unidirectional fabric layer with the chopped fiber spraying layer in a hot melting mode through a pressure roller, the adopted pressure is controlled within the range of 2-20MPa, and the hot melting temperature is flexibly adjusted according to the type of the used adhesive film matrix.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1
A chopped strand reinforced thermoplastic prepreg fabric structure comprising: the chopped fiber bundling structure comprises an unidirectional carbon fiber fabric layer 1, a chopped fiber bundling layer 2 and a chopped fiber reinforced thermoplastic resin adhesive film 4, wherein the chopped fiber bundling layer 2 is attached to the outside of the unidirectional carbon fiber fabric layer 1, and the chopped fiber reinforced thermoplastic resin adhesive film 4 is attached to the outside of the chopped fiber bundling layer 2.
The utility model provides a structure of short fibre reinforcement thermoplasticity preimpregnation fabric specifically can implement as follows: the main body reinforced fabric layer is prepared by adopting the carbon fiber filament bundles which are arranged in a T300 high-performance unidirectional mode, and the gram weight of the final fabric layer is 50g/m2And spraying a T300 carbon fiber layer which is 0.1mm thick, has a solid content of 40% and is 5mm long with polyurethane emulsion and is 0.1mm thick on two sides of the carbon fiber fabric layer by adopting a spraying pressure of 0.5MPa, and after the spraying is finished, drying the chopped fiber layer on the surface of the unidirectional carbon fiber by adopting a drying system of 120 ℃ and 2 hours. Then, aramid fiber with the length of 5mm is adopted to reinforce the polyamide resin adhesive film according to the proportion of doping 2%, and the final adhesive film thickness is controlled to be 0.5 mm. And (3) coating the chopped fiber reinforced thermoplastic resin adhesive film on the surface of the carbon fiber unidirectional fabric layer with the chopped fiber spray coating in a hot melting mode at 180 ℃ under the pressure of 2MPa to form the chopped fiber reinforced thermoplastic prepreg fabric.
Example 2
The utility model provides a structure of short fibre reinforcement thermoplasticity preimpregnation fabric specifically can implement as follows: the main body reinforced fabric layer is prepared by adopting the carbon fiber filament bundle with M60J high-performance unidirectional arrangement, and the gram weight of the final fabric layer is 200g/M2And spraying 1mm thick aramid fiber layers with the solid content of 45% of EVA emulsion and the length of 20mm on two sides of the carbon fiber fabric layer by adopting 2MPa spraying pressure, and after the spraying is finished, drying the chopped fiber layers on the surfaces of the unidirectional carbon fibers by adopting a drying system of 130 ℃ and 1 h. And then, adopting 10 mm-length glass fibers to reinforce the polypropylene resin adhesive film in a proportion of doping 6%, and finally controlling the thickness of the adhesive film to be 1 mm. And (3) coating the chopped fiber reinforced thermoplastic resin adhesive film on the surface of the carbon fiber unidirectional fabric layer with the chopped fiber spray coating in a hot melting mode at 150 ℃ under the pressure of 3MPa to form the chopped fiber reinforced thermoplastic prepreg fabric.
Example 3
The utility model provides a short fiberThe structure of the fiber reinforced thermoplastic prepreg fabric can be specifically implemented as follows: the main body reinforced fabric layer is prepared by adopting the carbon fiber filament bundles which are arranged in a T1000 high-performance unidirectional mode, and the gram weight of the final fabric layer is 100g/m2And spraying the M60 carbon fiber layer with the thickness of 0.8mm and the length of 7mm of polyolefin emulsion with the solid content of 55% on the two sides of the carbon fiber fabric layer by adopting the spraying pressure of 1MPa, and after the spraying is finished, drying the chopped fiber layer on the surface of the unidirectional carbon fiber by adopting a drying system of 127 ℃ and 2 hours. And then adopting PO fibers with the length of 10mm to dope 6% of the PO fibers to strengthen the polyethylene resin adhesive film, and finally controlling the thickness of the adhesive film to be 1.5 mm. And (3) coating the chopped fiber reinforced thermoplastic resin adhesive film on the surface of the carbon fiber unidirectional fabric layer with the chopped fiber spray coating in a hot melting mode at 130 ℃ under the pressure of 5MPa to form the chopped fiber reinforced thermoplastic prepreg fabric.
Example 4
The utility model provides a structure of short fibre reinforcement thermoplasticity preimpregnation fabric specifically can implement as follows: the main body reinforced fabric layer is prepared by adopting the carbon fiber filament bundle with M40 high-performance unidirectional arrangement, and the gram weight of the final fabric layer is 150g/M2And spraying a T1000 carbon fiber layer with the thickness of 0.6mm, the solid content of 60% polyurethane emulsion and the length of 10mm on two sides of the carbon fiber fabric layer by adopting a spraying pressure of 2MPa, and after the spraying is finished, drying the chopped fiber layer on the surface of the unidirectional carbon fiber by adopting a drying system of 129 ℃ and 1.5 h. And then, a PE fiber with the length of 11mm is adopted to reinforce the polyamide resin adhesive film in a proportion of doping 9%, and the final adhesive film thickness is controlled to be 0.9 mm. And (3) coating the chopped fiber reinforced thermoplastic resin adhesive film on the surface of the carbon fiber unidirectional fabric layer with the chopped fiber spray coating in a hot melting mode at 170 ℃ under the pressure of 12MPa to form the chopped fiber reinforced thermoplastic prepreg fabric.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the technical solutions described in the foregoing embodiments can be modified or partially replaced by equivalent solutions. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the foregoing describes the embodiments of the present invention, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (8)
1. A chopped strand reinforced thermoplastic prepreg fabric structure comprising: one-way carbon fiber fabric layer (1), chopped strand fiber bundling layer (2), chopped strand fiber reinforced thermoplastic resin glue film (4), chopped strand fiber bundling layer (2) is attached to one-way carbon fiber fabric layer (1) outside, chopped strand fiber reinforced thermoplastic resin glue film (4) attached in chopped strand fiber bundling layer (2) outside.
2. The chopped strand reinforced thermoplastic prepreg fabric structure of claim 1, wherein the chopped strands have a length of between 5 and 20mm and are surface impregnated with a thermoplastic emulsion.
3. The chopped strand reinforced thermoplastic prepreg fabric structure of claim 1, wherein the chopped strand bundle layer (2) has a thickness of 0.1-1 mm.
4. The chopped strand reinforced thermoplastic prepreg fabric structure of claim 1, wherein the chopped strands are any one of carbon fibers, glass fibers, basalt fibers or aramid fibers.
5. The chopped strand reinforced thermoplastic prepreg fabric structure of claim 1, wherein the chopped strand reinforced thermoplastic resin glue film (4) has a thickness of 0.5-2 mm.
6. The chopped strand reinforced thermoplastic prepreg fabric structure of claim 1, wherein the thermoplastic resin adhesive film is any one of polyamide, polyetherketone, polyetheretherketone, polyurethane, polyethylene, or polyolefin resin.
7. The chopped strand reinforced thermoplastic prepreg fabric structure of claim 1, wherein the length of the chopped strands in the chopped strand reinforced thermoplastic resin film (4) is 5-20 mm.
8. The chopped strand fiber reinforced thermoplastic prepreg fabric structure of claim 1, wherein the chopped strand fibers in the chopped strand fiber reinforced thermoplastic resin adhesive film (4) are any one of aramid fibers, PE fibers, PO fibers, PPS fibers and glass fibers.
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| CN202020272430.XU CN212555292U (en) | 2020-03-06 | 2020-03-06 | Chopped fiber reinforced thermoplastic prepreg fabric structure |
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| CN202020272430.XU CN212555292U (en) | 2020-03-06 | 2020-03-06 | Chopped fiber reinforced thermoplastic prepreg fabric structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111251673A (en) * | 2020-03-06 | 2020-06-09 | 山东宽原新材料科技有限公司 | Chopped fiber reinforced thermoplastic prepreg fabric structure and preparation and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111251673A (en) * | 2020-03-06 | 2020-06-09 | 山东宽原新材料科技有限公司 | Chopped fiber reinforced thermoplastic prepreg fabric structure and preparation and application thereof |
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