CN112248470A - Carbon fiber warp-knitted fabric product and preparation method and production equipment thereof - Google Patents

Carbon fiber warp-knitted fabric product and preparation method and production equipment thereof Download PDF

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Publication number
CN112248470A
CN112248470A CN202011033806.2A CN202011033806A CN112248470A CN 112248470 A CN112248470 A CN 112248470A CN 202011033806 A CN202011033806 A CN 202011033806A CN 112248470 A CN112248470 A CN 112248470A
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CN
China
Prior art keywords
carbon fiber
fiber warp
knitted fabric
thermoplastic resin
resin film
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Pending
Application number
CN202011033806.2A
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Chinese (zh)
Inventor
燕春云
张坤
王永利
王怡敏
高志成
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Jiangsu Hengshen Co Ltd
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Jiangsu Hengshen Co Ltd
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Priority to CN202011033806.2A priority Critical patent/CN112248470A/en
Publication of CN112248470A publication Critical patent/CN112248470A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/62—Stitching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7861—In-line machines, i.e. feeding, joining and discharging are in one production line
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
    • D04B21/16—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads
    • D04B21/165—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads with yarns stitched through one or more layers or tows, e.g. stitch-bonded fabrics

Abstract

The invention discloses a carbon fiber warp-knitted fabric product and a preparation method and production equipment thereof, belonging to the technical field of materials. The preparation method comprises the following steps: the carbon fiber warp knitted fabric and the thermoplastic resin film embedded in the carbon fiber warp knitted fabric are sewn. The carbon fiber warp knitted fabric has at least two carbon fiber warp knitted fabric layers, and at least one thermoplastic resin film is embedded between at least one group of two adjacent carbon fiber warp knitted fabric layers. The method has simple process and short period, can easily infiltrate the thermoplastic resin into the carbon fiber warp-knitted fabric, can enhance the parallel straightening state of the fiber when ensuring the resin flow, can suppress the interference of the orientation of the enhanced fiber to the minimum through the flow of the heated/pressurized resin at the later stage, and improves the precision of the fiber orientation. The thermoplastic resin in the obtained carbon fiber warp-knitted fabric product is uniformly soaked in the carbon fiber warp-knitted fabric, and the fiber orientation precision is high. The corresponding production equipment has simple structure and flexible operation.

Description

Carbon fiber warp-knitted fabric product and preparation method and production equipment thereof
Technical Field
The invention relates to the technical field of materials, in particular to a carbon fiber warp-knitted fabric product and a preparation method and production equipment thereof.
Background
With the wide application of the carbon fiber multi-axial warp knitting fabric in the fields of wind power, automobiles, ships and the like, thermosetting resin is mostly selected as a reinforcing material, and the molding process is generally VARI, RTM and the like. The corresponding forming cycle is long, and the process comprises the processes of fabric production, cutting, paving and pasting, bag making, resin preparation, vacuumizing, glue injection and the like, and a large amount of manpower and material resources are needed.
Therefore, in the prior art, a thermoplastic resin has been gradually used in place of a thermosetting resin, but the thermoplastic resin has a high melt viscosity, generally exceeding 100 pas, and is difficult to wet fibers.
In view of this, the invention is particularly proposed.
Disclosure of Invention
One of the objects of the present invention includes providing a method for manufacturing a carbon fiber warp knit fabric product, which is simple in process, short in cycle time, and capable of relatively easily impregnating a thermoplastic resin into a carbon fiber warp knit fabric.
The second object of the present invention is to provide a carbon fiber warp knit fabric product obtained by the above production method, in which thermoplastic resin is uniformly impregnated in the carbon fiber warp knit fabric and the precision of fiber orientation is high.
The invention also aims to provide production equipment of the carbon fiber warp knitting fabric product, which has simple structure and flexible operation.
The application can be realized by the following modes:
in a first aspect, the present application provides a method for preparing a carbon fiber warp knit fabric product, comprising the steps of: the carbon fiber warp knit and the thermoplastic resin film embedded in the carbon fiber warp knit are sewn.
The carbon fiber warp knitted fabric has at least two carbon fiber warp knitted fabric layers, and at least one thermoplastic resin film is embedded between at least one group of two adjacent carbon fiber warp knitted fabric layers.
In an alternative embodiment, the lay direction of the carbon fiber yarns in each layer of the carbon fiber warp knit fabric is different.
In an alternative embodiment, the stitching is performed using a stitching mechanism.
In an alternative embodiment, the sewing of the preform further comprises heating and pressing the stitched preform to impregnate the thermoplastic resin film into the carbon fiber warp knitted fabric layer on both sides of the thermoplastic resin film.
In an alternative embodiment, the heating is performed using a roller heating mechanism.
In an alternative embodiment, cooling the heated preform is also included.
In an alternative embodiment, the cooling to the preform temperature is in the range of 15-35 ℃.
In an alternative embodiment, the cooling is performed using a cooling mechanism.
In an alternative embodiment, the method further comprises rolling the cooled preform.
In an optional embodiment, the winding is performed by a winding mechanism.
In a second aspect, the present application provides a carbon fiber warp knit fabric product processed by the method of any one of the preceding embodiments.
In an alternative embodiment, the grammage of the resulting carbon fiber warp knit fabric product is from 75 to 1600g/m2。
In an alternative embodiment, the carbon fiber warp knit fabric product has a thermoplastic resin film weight of 20 to 40 wt% and a carbon fiber warp knit fabric layer weight of 60 to 80 wt%.
In a third aspect, the present application provides a production apparatus for a carbon fiber warp knitting fabric product as in the foregoing embodiment, including a thermoplastic resin film unwinding mechanism, a carbon fiber warp knitting fabric unwinding mechanism, a stitching mechanism, and a conveying mechanism.
The transmission mechanism is used for transmitting the thermoplastic resin film paved by the thermoplastic resin film unreeling mechanism and the carbon fiber yarns paved by the carbon fiber warp-knitted fabric unreeling mechanism.
The stitching mechanism is used for stitching the carbon fiber warp knitting fabric embedded with the thermoplastic resin film and conveyed by the conveying mechanism.
In an alternative embodiment, the number of the carbon fiber warp knitting fabric unwinding mechanisms is at least 2, and 1 thermoplastic resin film unwinding mechanism is arranged between at least one group of adjacent 2 carbon fiber warp knitting fabric unwinding mechanisms.
In an alternative embodiment, the unwinding angles of the adjacent 2 carbon fiber warp knitting fabric unwinding mechanisms are different.
In an alternative embodiment, the carbon fiber warp knitting fabric unwinding mechanism includes a first carbon fiber warp knitting fabric unwinding mechanism to a fourth carbon fiber warp knitting fabric unwinding mechanism. The thermoplastic resin film unwinding mechanism includes a first thermoplastic resin film unwinding mechanism to a third thermoplastic resin film unwinding mechanism. The four carbon fiber warp knitting fabric unwinding mechanisms and the three thermoplastic resin film unwinding mechanisms are sequentially arranged in a staggered mode according to the transmission direction.
In an optional embodiment, the unwinding angle of the first carbon fiber warp knitted fabric unwinding mechanism is-45 degrees to-60 degrees; the unwinding angle of the second carbon fiber warp knitted fabric unwinding mechanism is 90 degrees; the unwinding angle of the third carbon fiber warp knitted fabric unwinding mechanism is +45 degrees to +60 degrees; the unwinding angle of the fourth carbon fiber warp knitted fabric unwinding mechanism is 0 degree.
In an alternative embodiment, the production facility further comprises a heating mechanism disposed downstream of the stitching mechanism.
In an alternative embodiment, the heating mechanism is a roller heating mechanism.
In an alternative embodiment, the production facility further comprises a cooling mechanism disposed downstream of the heating mechanism.
In an alternative embodiment, the production facility further comprises a take-up mechanism disposed downstream of the cooling mechanism.
The invention has the following beneficial effects:
according to the preparation method of the carbon fiber warp-knitted fabric product, the thermoplastic resin film is directly embedded into the carbon fiber warp-knitted fabric and is sewn, the process is simple, the period is short, and the thermoplastic resin can be easily and uniformly infiltrated into the carbon fiber warp-knitted fabric without pre-dipping operation. And, because the carbon fiber warp knitting fabric and the thermoplastic resin membrane are sewed together, the parallel straightening state of the reinforcing fiber is favorably ensured when the resin flows, so that the interference of the orientation of the reinforcing fiber is conveniently suppressed to the minimum by the flow of the resin after heating/pressurizing in the later period, and the precision of the orientation of the fiber is improved. The thermoplastic resin in the obtained carbon fiber warp-knitted fabric product is uniformly soaked in the carbon fiber warp-knitted fabric, and the fiber orientation precision is high. The corresponding production equipment has simple structure and flexible operation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of a production apparatus for a carbon fiber warp knit fabric product provided in example 1 of the present application;
FIG. 2 is a schematic view of a production apparatus for a carbon fiber warp knit fabric product provided in example 2 of the present application;
FIG. 3 is a schematic view of the arrangement of layers of a carbon fiber warp knitted fabric product provided in example 3 of the present application;
FIG. 4 is a schematic view of the arrangement of layers of a carbon fiber warp knitted fabric product provided in example 4 of the present application;
fig. 5 is a schematic view of arrangement of layers of the carbon fiber warp knitting fabric product provided in example 5 of the present application.
Description of the main element symbols: 11-a fourth thermoplastic resin film unwinding mechanism; 12-a first thermoplastic resin film unwinding mechanism; 13-a second thermoplastic resin film unwinding mechanism; 14-a third thermoplastic resin film unwinding mechanism; 15-a fifth thermoplastic resin film unwinding mechanism; laying a weft yarn frame at 21-45 degrees on line; laying a weft yarn frame at 22-90 degrees on line; laying weft yarn frames at 23- +45 degrees on line; laying a weft yarn frame at 24-0 degrees on line; 3-a stitching mechanism; 4-a roller heating mechanism; 5-a cooling mechanism; 6, a winding mechanism; 101-a first thermoplastic resin film layer; 102-a second thermoplastic resin film layer; 103-a third thermoplastic resin film layer; 104-a fourth thermoplastic resin film layer; 105-a fifth thermoplastic resin film layer; 201-a first carbon fiber warp knit fabric layer; 202-a second carbon fiber warp knit fabric layer; 203-a third carbon fiber warp knitted fabric layer; 204-a fourth carbon fiber warp knit fabric layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "upper", "lower", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance or absolute order.
The carbon fiber warp knit fabric product provided by the present application, and the method and apparatus for manufacturing the same will be described in detail below.
The inventors found that the thermoplastic resin has a high melt viscosity and is difficult to wet the fibers. At present, a compression molding process is usually adopted, thermoplastic resin can be soaked in fibers for carbon fiber fabrics with lower gram weight, but a mode of increasing pressure and prolonging compression molding time is adopted in the production process to improve the soaking effect, so that the requirement on equipment is higher, the production period is long, and the economic effect is lower. For the carbon fiber multi-axial warp knitting fabric with larger gram weight, if the compression molding process is still adopted, the resin is difficult to be completely soaked into the fibers in the fabric, and the performance and the appearance of the material are greatly influenced.
Accordingly, the present application proposes a method for preparing a carbon fiber warp knit fabric product, which may include the steps of: the carbon fiber warp knit and the thermoplastic resin film embedded in the carbon fiber warp knit are sewn.
The carbon fiber warp knitted fabric comprises at least two carbon fiber warp knitted fabric layers, and at least one thermoplastic resin film is embedded between at least one group of two adjacent carbon fiber warp knitted fabric layers.
For example, when the carbon fiber warp knit fabric has only two carbon fiber warp knit fabric layers, the thermoplastic resin film is embedded between the two carbon fiber warp knit fabric layers. Specifically, it can be understood in the following manner: when the carbon fiber warp knitted fabric has only the first carbon fiber warp knitted fabric layer and the second carbon fiber warp knitted fabric layer, the thermoplastic resin film is embedded between the first carbon fiber warp knitted fabric layer and the second carbon fiber warp knitted fabric layer.
When the carbon fiber warp knitted fabric has three carbon fiber warp knitted fabric layers (a first carbon fiber warp knitted fabric layer, a second carbon fiber warp knitted fabric layer, and a third carbon fiber warp knitted fabric layer), the thermoplastic resin film may be embedded only between the first carbon fiber warp knitted fabric layer and the second carbon fiber warp knitted fabric layer, may be embedded only between the second carbon fiber warp knitted fabric layer and the third carbon fiber warp knitted fabric layer, and may be embedded both between the first carbon fiber warp knitted fabric layer and the second carbon fiber warp knitted fabric layer and between the second carbon fiber warp knitted fabric layer and the third carbon fiber warp knitted fabric layer.
Similarly, when the carbon fiber warp knitted fabric has three or more carbon fiber warp knitted fabric layers, the thermoplastic resin film may be embedded only between any two adjacent carbon fiber warp knitted fabric layers, may be embedded between any two adjacent carbon fiber warp knitted fabric layers, and may be embedded between each two adjacent carbon fiber warp knitted fabric layers.
It is to be noted that the specific position where the thermoplastic resin film is embedded in the carbon fiber warp knitted fabric layer may be distributed according to the angle of the carbon fiber warp knitted fabric layer. In actual practice, the number of layers of the thermoplastic resin film to be inserted may be 1 or a plurality of layers (2 or more), and may be selectively set as needed.
Similarly, the specific grammage of the thermoplastic resin film embedded in the carbon fiber warp knitted fabric layer may also be determined according to the grammage of the carbon fiber warp knitted fabric layer. The material of the thermoplastic resin film may be, for example, polypropylene (PP) or polyamide 6(PA 6).
In some embodiments, the lay direction of the carbon fiber yarns in each layer of the carbon fiber warp knit fabric is different. Alternatively, the laying angle of each layer can be, but is not limited to, 0 °, +45 °, -45 °, +60 °, -60 °, or 90 °, and in addition, other laying angles can be set according to actual needs, and the flexibility is high.
Furthermore, a new thermoplastic resin film can be additionally paved on the outer side of the carbon fiber warp-knitted fabric layer positioned on the outermost side.
In an alternative embodiment, stitching may be performed using a stitching mechanism.
An embedded carbon fiber multi-axial warp knitted fabric is formed by sewing together a carbon fiber warp knitted fabric layer and a thermoplastic resin film layer.
Compared with the traditional prepreg, the method for directly embedding the thermoplastic resin film into the carbon fiber warp-knitted fabric and sewing the thermoplastic resin film has the advantages of simple process and short period, saves the processes of resin mixing, film coating, impregnation and the like, and saves a large amount of time and auxiliary materials. Examples include: save the manpower of forming process: because the material contains resin, the time is saved, and the resin layer can be laid manually; as for the labor-saving forming process, resin is not required to be introduced in a vacuum-assisted manner, and the end user only needs to attach the carbon fiber multi-axial warp knitting fabric embedded with the thermoplastic resin film to a mold, then cut the fabric, and heat and press the fabric to form the carbon fiber multi-axial warp knitting fabric. Therefore, the lamination time can be reduced by 40-60% compared to unidirectional materials without resin film and ordinary multiaxial warp knit fabrics.
Further, by directly embedding the thermoplastic resin film in the carbon fiber warp knitted fabric and sewing it, the thermoplastic resin can be uniformly impregnated into the carbon fiber warp knitted fabric without performing a preliminary dipping operation. And, because the carbon fiber warp knitting fabric and the thermoplastic resin membrane are sewed together, the parallel straightening state of the reinforcing fiber is favorably ensured when the resin flows, so that the interference of the orientation of the reinforcing fiber is conveniently suppressed to the minimum by the flow of the resin after heating/pressurizing in the later period, and the precision of the orientation of the fiber is improved. End users can achieve styling with a variety of physical properties, strength, and stiffness, as desired by designers.
In the present application, a composite of a thermoplastic resin film and a carbon fiber warp knit fabric obtained by sewing is defined as a preform. Further, the method for manufacturing a carbon fiber warp knit fabric product further comprises heating and pressing the stitched preform to impregnate the thermoplastic resin film into the carbon fiber warp knit fabric layers on both sides of the thermoplastic resin film.
As a reference, the heating may be performed using a roll heating mechanism to apply pressure while heating, so that the melted thermoplastic resin is rapidly impregnated into the warp knit fabric.
The heating temperature may be, for example, 180 to 250 ℃ for 1 to 5 minutes. The pressurization is realized by the self gravity of the roller type heating mechanism, and the corresponding pressure in the pressurization process can be 1-1.5 MPa.
Further, the method can also comprise cooling the heated prefabricated product to facilitate the subsequent rolling operation.
In an alternative embodiment, cooling to room temperature may be sufficient, for example to a preform temperature of 15-35 ℃.
As can be appreciated, cooling may be performed using a cooling mechanism.
Further, the method can also comprise rolling the cooled prefabricated product. As a reference, the winding is performed using a winding mechanism.
It should be noted that the above processes related to heating, cooling and rolling can refer to the prior art, and are not described herein in any detail.
In addition, the application also provides a carbon fiber warp-knitted fabric product which is obtained by processing the carbon fiber warp-knitted fabric product by the preparation method.
In an alternative embodiment, the grammage of the resulting carbon fiber warp knit fabric product may be 75-1600g/m2. Wherein the weight of the thermoplastic resin film can be 20-40 wt%, and correspondingly, the weight of the carbon fiber warp-knitted fabric layer is 60-80 wt%.
In some embodiments, the thermoplastic resin film may be 20 wt%, 25 wt%, 30 wt%, 35 wt%, or 40 wt% by weight, and the carbon fiber warp knit fabric layer may be 80 wt%, 75 wt%, 70 wt%, 65 wt%, or 60 wt% by weight.
According to the carbon fiber warp-knitted fabric product, the thermoplastic resin can be completely soaked into the carbon fiber warp-knitted fabric layer, the orientation precision of the fiber is high, and a final user can realize modeling with various physical properties, strength and rigidity according to the requirements of designers.
In addition, this application still provides the production facility of above-mentioned carbon fiber warp knitting product, including thermoplastic resin membrane unwinding mechanism, carbon fiber warp knitting unwinding mechanism, sewing up mechanism and transmission device.
The transmission mechanism is used for transmitting the thermoplastic resin film paved by the thermoplastic resin film unreeling mechanism and the carbon fiber yarns paved by the carbon fiber warp knitting fabric unreeling mechanism.
The sewing mechanism is used for sewing the carbon fiber warp knitting fabric embedded with the thermoplastic resin film and conveyed by the conveying mechanism so as to sew all the thermoplastic resin film layers and the carbon fiber warp knitting fabric layers together to form the multi-axial warp knitting fabric.
In an alternative embodiment, the number of the carbon fiber warp knitting fabric unwinding mechanisms is at least 2, and 1 thermoplastic resin film unwinding mechanism is arranged between at least one group of adjacent 2 carbon fiber warp knitting fabric unwinding mechanisms.
In some embodiments, the number of carbon fiber warp knitting fabric unwinding mechanisms may be only 2, and the number of thermoplastic resin film unwinding mechanisms may be only 1, in which case the carbon fiber warp knitting fabric layer has 2 layers, and 1 (or more) thermoplastic resin film is embedded in the 2 carbon fiber warp knitting fabric layers.
In some other embodiments, the number of the carbon fiber warp knitting fabric unwinding mechanisms may be greater than 2, and 1 thermoplastic resin film unwinding mechanism is arranged between at least one group of adjacent 2 carbon fiber warp knitting fabric unwinding mechanisms. In this case, each carbon fiber warp knitting fabric unwinding mechanism can be paved with carbon fiber yarns, and each thermoplastic resin film unwinding mechanism is paved with thermoplastic resin films; or the carbon fiber yarns can be selectively laid through a certain carbon fiber unwinding mechanism and the thermoplastic resin film can be laid through a certain thermoplastic resin film unwinding mechanism according to requirements.
Preferably, the unwinding angles of the unwinding mechanisms of the adjacent 2-carbon fiber warp knitting fabrics are different. The method specifically comprises the following steps: the unwinding angles of all carbon fiber warp knitted fabric unwinding mechanisms are different from each other, namely the laying angles of all carbon fiber warp knitted fabric layers are different; the unwinding angles of the carbon fiber warp knitted fabric unwinding mechanisms which are not adjacent to each other can be consistent, and carbon fiber warp knitted fabric layers with the same laying angle are arranged in all the carbon fiber warp knitted fabric layers.
Taking the following embodiment as an example, the carbon fiber warp knitting fabric unwinding mechanism includes a first carbon fiber warp knitting fabric unwinding mechanism to a fourth carbon fiber warp knitting fabric unwinding mechanism, and the thermoplastic resin film unwinding mechanism includes a first thermoplastic resin film unwinding mechanism to a third thermoplastic resin film unwinding mechanism. The four carbon fiber warp knitting fabric unwinding mechanisms and the three thermoplastic resin film unwinding mechanisms are sequentially arranged in a staggered mode according to the transmission direction.
The unwinding angle of the first carbon fiber warp knitted fabric unwinding mechanism can be-45 degrees to-60 degrees (preferably-45 degrees or-60 degrees), the unwinding angle of the second carbon fiber warp knitted fabric unwinding mechanism can be 90 degrees, the unwinding angle of the third carbon fiber warp knitted fabric unwinding mechanism can be +45 degrees to +60 degrees (for example +45 degrees or +60 degrees), and the unwinding angle of the fourth carbon fiber warp knitted fabric unwinding mechanism can be 0 degree. The carbon fiber warp knitted fabric unwinding mechanism can be an online weft laying creel.
In actual production, the carbon fiber warp-knitted fabric layer and the thermoplastic resin film can be selectively laid on the corresponding unwinding mechanism according to the number of layers and yarn angles required by a product.
It should be noted that, as required, additional resin film unwinding mechanisms may be further provided at the upstream end of the first carbon fiber warp knitting fabric unwinding mechanism and the downstream end of the fourth carbon fiber warp knitting fabric unwinding mechanism, respectively.
Further, the production apparatus may further include a heating mechanism, such as a roller heating mechanism, disposed downstream of the sewing mechanism. The roller type heating mechanism not only can heat and melt the thermoplastic resin, but also can pressurize the fabric through the roller so that the thermoplastic resin completely infiltrates the carbon fiber warp-knitted fabric.
Further, the production apparatus may further include a cooling mechanism disposed downstream of the heating mechanism to cool the heated preform to room temperature to facilitate the winding operation.
Further, the production apparatus may further include a take-up mechanism disposed downstream of the cooling mechanism to take up the product in a roll form for use.
Bear, the production facility simple structure of the carbon fiber warp knitting fabric product that this application provided, the flexible operation, convenient to use.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
Referring to fig. 1, the present embodiment provides a production apparatus for carbon fiber warp knitting products, which includes a thermoplastic resin film unwinding mechanism, a carbon fiber warp knitting unwinding mechanism, a sewing mechanism 3, a conveying mechanism, a roller heating mechanism 4, a cooling mechanism 5, and a winding mechanism 6.
The carbon fiber warp knitting fabric unwinding mechanism comprises a first carbon fiber warp knitting fabric unwinding mechanism to a fourth carbon fiber warp knitting fabric unwinding mechanism, and the thermoplastic resin film unwinding mechanism comprises a first thermoplastic resin film unwinding mechanism 12, a second thermoplastic resin film unwinding mechanism 13 and a third thermoplastic resin film unwinding mechanism 14.
Specifically, from the upstream to the downstream of the production, a first carbon fiber warp knitting fabric unwinding mechanism (-45 ° online weft laying creel 21 or-60 ° online weft laying creel), a first thermoplastic resin film unwinding mechanism 12, a second carbon fiber warp knitting fabric unwinding mechanism (90 ° online weft laying creel 22), a second thermoplastic resin film unwinding mechanism 13, a third carbon fiber warp knitting fabric unwinding mechanism (+45 ° online weft laying creel 23 or +60 ° online weft laying creel), a third thermoplastic resin film unwinding mechanism 14, a fourth carbon fiber warp knitting fabric unwinding mechanism (0 ° online weft laying creel 24), a sewing mechanism 3, a roller type heating mechanism 4, a cooling mechanism 5 and a winding mechanism 6 are sequentially arranged. The transport mechanism is a conveyor belt, which runs through the entire production line.
Example 2
Referring to fig. 2, the present embodiment provides a production apparatus for a carbon fiber warp knitting fabric product, which is different from embodiment 1 only in that: a fourth thermoplastic resin film unwinding mechanism 11 is arranged at the upstream of the first carbon fiber warp knitting fabric unwinding mechanism, and a fifth thermoplastic resin film unwinding mechanism 15 is arranged between the fourth carbon fiber warp knitting fabric unwinding mechanism and the sewing mechanism 3.
Example 3
Referring to fig. 3, the present embodiment provides a carbon fiber warp knitted fabric product, which includes 2 carbon fiber warp knitted fabric layers (from bottom to top, respectively, the first carbon fiber warp knitted fabric layer 201 and the second carbon fiber warp knitted fabric layer 202) and 1 thermoplastic resin film layer (PP). The plastic resin film layer is embedded in the middle of the 2 carbon fiber warp-knitted fabric layers. Namely, from bottom to top, a first carbon fiber warp knitted fabric layer 201, a thermoplastic resin film layer, and a second carbon fiber warp knitted fabric layer 202, respectively.
The directions of the 2 carbon fiber warp-knitted fabric layers are different, wherein the layering direction of the carbon fiber yarns in the carbon fibers of the first carbon fiber warp-knitted fabric layer 201 is-45 degrees, and the layering direction of the carbon fiber yarns in the carbon fibers of the second carbon fiber warp-knitted fabric layer 202 is +45 degrees.
The gram weight of the carbon fiber warp-knitted fabric product is 450g/m2Wherein the gram weight of the thermoplastic resin film layer is 150g/m2Of warp-knitted carbon fibre fabricsThe total gram weight is 300g/m2(i.e., the gram weight of each carbon fiber warp-knitted fabric layer is 150g/m2)。
The processing of the carbon fiber warp knitted fabric product adopts the production equipment of the carbon fiber warp knitted fabric product provided in the embodiment 1 to carry out production, and the process steps comprise the following steps:
the first carbon fiber warp-knitted fabric layer 201 is laid on a conveyor belt by a minus 45-degree online weft laying creel 21, then the first carbon fiber warp-knitted fabric layer is conveyed to a second thermoplastic resin film unwinding mechanism 13 to be laid with a thermoplastic resin film layer (a first thermoplastic resin film layer 101), and then the second carbon fiber warp-knitted fabric layer 202 is conveyed to a plus 45-degree online weft laying creel 23 to be laid.
Further, the materials are sequentially conveyed to a sewing mechanism 3 for sewing, conveyed to a roller type heating mechanism 4 for heating and pressurizing (the heating temperature is 180 ℃, the time is 1min, and the pressurizing pressure is 1MPa), conveyed to a cooling mechanism 5 for cooling to the room temperature, and conveyed to a rolling mechanism 6 for rolling and forming.
Example 4
Referring to fig. 4, the present embodiment provides a carbon fiber warp knitted fabric product, which includes 4 carbon fiber warp knitted fabric layers (from bottom to top, respectively denoted as a first carbon fiber warp knitted fabric layer 201, a second carbon fiber warp knitted fabric layer 202, a third carbon fiber warp knitted fabric layer 203, and a fourth carbon fiber warp knitted fabric layer 204), and 3 thermoplastic resin film layers (PA6) (a first thermoplastic resin film layer 101, a second thermoplastic resin film layer 102, and a third thermoplastic resin film layer 103). The 3 plastic resin film layers are respectively embedded in the middle of the 4 carbon fiber warp-knitted fabric layers. Namely, from bottom to top, a first carbon fiber warp knitted fabric layer 201, a first thermoplastic resin film layer 101, a second carbon fiber warp knitted fabric layer 202, a second thermoplastic resin film layer 102, a third carbon fiber warp knitted fabric layer 203, a third thermoplastic resin film layer 103 and a fourth carbon fiber warp knitted fabric layer 204 are respectively provided.
The directions of the 4 carbon fiber warp-knitted fabric layers are different, wherein the layer spreading direction of the carbon fiber yarns in the carbon fibers of the first carbon fiber warp-knitted fabric layer 201 is-45 degrees, the layer spreading direction of the carbon fiber yarns in the carbon fibers of the second carbon fiber warp-knitted fabric layer 202 is 90 degrees, the layer spreading direction of the carbon fiber yarns in the carbon fibers of the third carbon fiber warp-knitted fabric layer 203 is +45 degrees, and the layer spreading direction of the carbon fiber yarns in the carbon fibers of the fourth carbon fiber warp-knitted fabric layer 204 is 0 degree.
The gram weight of the carbon fiber warp-knitted fabric product is 900g/m2Wherein the total gram weight of the thermoplastic resin film layer is 300g/m2(i.e., the grammage of each thermoplastic resin film layer is 100g/m2) The total gram weight of the carbon fiber warp-knitted fabric layer is 600g/m2(i.e., the gram weight of each carbon fiber warp-knitted fabric layer is 150g/m2)。
The processing of the carbon fiber warp knitted fabric product adopts the production equipment of the carbon fiber warp knitted fabric product provided in the embodiment 1 to carry out production, and the process steps comprise the following steps:
firstly, a-45-degree online weft laying creel 21 is used for laying a first carbon fiber warp knitting fabric layer 201 on a conveyor belt, then the first carbon fiber warp knitting fabric layer is sequentially conveyed to a first thermoplastic resin film unwinding mechanism 12 for laying a first thermoplastic resin film layer 101, conveyed to a 90-degree online weft laying creel 22 for laying a second carbon fiber warp knitting fabric layer 202, conveyed to a second thermoplastic resin film unwinding mechanism 13 for laying a second thermoplastic resin film layer 102, conveyed to a-45-degree online weft laying creel 21 for laying a third carbon fiber warp knitting fabric layer 203, conveyed to a third thermoplastic resin film unwinding mechanism 14 for laying a third thermoplastic resin film layer 103, and conveyed to a 0-degree online weft laying creel 24 for laying a fourth carbon fiber warp knitting fabric layer 204.
Further, the materials are sequentially conveyed to a sewing mechanism 3 for sewing, conveyed to a roller type heating mechanism 4 for heating and pressurizing (the heating temperature is 230 ℃, the time is 3min, and the pressurizing applied pressure is 1.2MPa), conveyed to a cooling mechanism 5 for cooling to the room temperature, and conveyed to a rolling mechanism 6 for rolling and forming.
Example 5
Referring to fig. 5, the present embodiment provides a carbon fiber warp knitted fabric product, which includes 4 carbon fiber warp knitted fabric layers (from bottom to top, respectively, the first carbon fiber warp knitted fabric layer 201, the second carbon fiber warp knitted fabric layer 202, the third carbon fiber warp knitted fabric layer 203, and the fourth carbon fiber warp knitted fabric layer 204), and 5 thermoplastic resin film layers (PA6) (from bottom to top, respectively, the fourth thermoplastic resin film layer 104, the first thermoplastic resin film layer 101, the second thermoplastic resin film layer 102, the third thermoplastic resin film layer 103, and the fifth thermoplastic resin film layer 105).
The first to third thermoplastic resin film layers 103 are respectively embedded in the middle of the 4 carbon fiber warp knitted fabric layers, and the fourth thermoplastic resin film layer 104 and the fifth thermoplastic resin film layer 105 are respectively disposed outside the first carbon fiber warp knitted fabric layer 201 and the fourth carbon fiber warp knitted fabric layer 204. Namely, from bottom to top, a fourth thermoplastic resin film layer 104, a first carbon fiber warp knitted fabric layer 201, a first thermoplastic resin film layer 101, a second carbon fiber warp knitted fabric layer 202, a second thermoplastic resin film layer 102, a third carbon fiber warp knitted fabric layer 203, a third thermoplastic resin film layer 103, a fourth carbon fiber warp knitted fabric layer 204 and a fifth thermoplastic resin film layer 105 are respectively provided.
The directions of the 4 carbon fiber warp-knitted fabric layers are different, wherein the layer spreading direction of the carbon fiber yarns in the carbon fibers of the first carbon fiber warp-knitted fabric layer 201 is-45 degrees, the layer spreading direction of the carbon fiber yarns in the carbon fibers of the second carbon fiber warp-knitted fabric layer 202 is 90 degrees, the layer spreading direction of the carbon fiber yarns in the carbon fibers of the third carbon fiber warp-knitted fabric layer 203 is +45 degrees, and the layer spreading direction of the carbon fiber yarns in the carbon fibers of the fourth carbon fiber warp-knitted fabric layer 204 is 0 degree.
The gram weight of the carbon fiber warp-knitted fabric product is 1300g/m2Wherein the total gram weight of the thermoplastic resin film layer is 500g/m2(i.e., the grammage of each thermoplastic resin film layer is 100g/m2) The total gram weight of the carbon fiber warp-knitted fabric layer is 800g/m2(i.e., the grammage of each carbon fiber warp knit fabric layer is 200g/m2)。
The processing of the carbon fiber warp knitted fabric product adopts the production equipment of the carbon fiber warp knitted fabric product provided by the embodiment 2 to carry out production, and the process steps comprise the following steps:
laying a fourth thermoplastic resin film layer 104 at a fourth thermoplastic resin film unreeling mechanism 11, sequentially conveying to a-45-degree online weft laying creel 21 to lay a first carbon fiber warp knitting fabric layer 201, conveying to a first thermoplastic resin film unreeling mechanism 12 to lay a first thermoplastic resin film layer 101, conveying to a 90-degree online weft laying creel 22 to lay a second carbon fiber warp knitting fabric layer 202, the first carbon fiber warp knitted fabric layer is conveyed to the second thermoplastic resin film unwinding mechanism 13 to be laid with the second thermoplastic resin film layer 102, conveyed to the + 45-degree online weft laying creel 23 to be laid with the third carbon fiber warp knitted fabric layer 203, conveyed to the third thermoplastic resin film unwinding mechanism 14 to be laid with the third thermoplastic resin film layer 103, conveyed to the 0-degree online weft laying creel 24 to be laid with the fourth carbon fiber warp knitted fabric layer 204, and conveyed to the fifth thermoplastic resin film unwinding mechanism 15 to be laid with the fifth thermoplastic resin film layer 105.
Further, the materials are sequentially conveyed to a sewing mechanism 3 for sewing, conveyed to a roller type heating mechanism 4 for heating and pressurizing (the heating temperature is 240 ℃, the time is 3min, and the pressurizing applied pressure is 1.3MPa), conveyed to a cooling mechanism 5 for cooling to the room temperature, and conveyed to a rolling mechanism 6 for rolling and forming.
Test examples
The product of example 4 was compared to a conventional lay-up process:
stability of the fabric structure: the carbon fiber warp knitted fabric added with the thermoplastic resin film has good deformation resistance and is not easy to deform in the processes of transportation, laying and cutting; in contrast, in the conventional warp knit in which only binding yarns fix the fabric between layers at every angle, the shape of the fabric is hardly maintained during transportation, cutting, and layering.
Wettability and lamination time: in the application, the thermoplastic resin film is embedded into the carbon fiber fabric of each layer, the traditional carbon fiber warp knitted fabric is sewn in a multi-layer mode, the corresponding thermoplastic resin film is laid in each carbon fiber warp knitted fabric in the laying process, and finally, under the same laminating time, the infiltration effect in the embodiment 4 is improved by 50% compared with that in the traditional method; the same impregnation effect (resin impregnation does not represent good molding effect) was achieved and the lamination time of example 4 could be reduced by 40-60%.
Degree of orientation of fibers: because the two fabrics are different in mode, the heating temperature, the pressure and the laminating time applied to achieve the same wettability are greatly different, the heating temperature, the pressure and the laminating time applied to the traditional carbon fiber warp-knitted fabric are higher than those of the thermoplastic resin film warp-knitted fabric, and the flow of the resin after heating/pressurizing is large, so that the fiber orientation is greatly disturbed, and the fiber orientation precision is influenced.
Comparative example
Taking example 3 as an example, a comparative example is set up. The comparative example differs from example 3 in that: laying a thermoplastic resin film on the uppermost (lowermost) of the first carbon fiber warp-knitted fabric layer and the second carbon fiber warp-knitted fabric layer, and then sewing;
the carbon fiber warp-knitted fabric product obtained in example 1 and the carbon fiber warp-knitted fabric product obtained in the comparative example are compared in performance, and the wettability and the orientation degree of the warp-knitted fabric are tested by the following test methods:
the wettability is tested by a water absorption method, and the principle is that when dry fibers which are not wrapped by resin in a carbon fiber warp-knitted fabric are contacted with water in advance, capillary vessel water absorption phenomenon occurs, and water rises along capillaries among fiber bundles and infiltrates the fibers until the saturated water absorption capacity is reached. The capillary channels among the fibers soaked by the resin after saturation are closed, and no capillary action is generated to absorb water any more, so that the content of dry fibers in the carbon fiber warp-knitted fabric after heating and pressurizing can be judged according to the amount of the water absorption, and the wettability of the carbon fiber warp-knitted fabric can be tested.
The orientation degree was measured as follows:
cutting a carbon fiber warp-knitted fabric sample along a direction which forms a certain included angle with the fiber at 0 degrees to obtain a sample section; preparing a metallographic microscope sample from the section of the test sample, and taking and amplifying an optical micrograph; and obtaining a data result of the fiber orientation angle by adopting a matlab digital image processing method.
The results are shown in table 1:
table 1 comparison of test results for example 3 and comparative example
Figure BDA0002704507410000161
As can be seen from Table 1, 1) the structural stability of the fabric is greatly improved when compared with the conventional manner of the comparative example 3; 2) example 3 is superior to the comparative example in both wettability and degree of orientation at the same temperature, pressure and time.
Bearing on, the technical scheme that this application provided has following characteristics at least:
(1) flexibility of design: the method can be adjusted according to the requirements of customers, and the design flexibility is embodied from the aspects of material selection, layered structure, sewing mode design and the like in the aspect of design flexibility. The continuous carbon fiber multi-axial warp knitting fabric can be customized according to the requirements of users to be 0 degrees, 45 degrees, 60 degrees, 45 degrees/90 degrees/45 degrees, 0 degrees/45 degrees/90 degrees/45 degrees and the like;
(2) compared with the traditional prepreg, the method saves the processes of resin mixing, film coating, impregnation and the like, and saves a large amount of time and auxiliary materials. Save the manpower of forming process: because the material contains resin, the time is saved, and the resin layer can be laid manually; as for the labor-saving molding process, resin is not required to be introduced in a vacuum-assisted manner, and the end user only needs to attach the carbon fiber multi-axial warp knitting fabric embedded with the thermoplastic resin film to a mold, then cut the fabric, and heat/press the fabric to mold. Therefore, compared with a unidirectional material without a resin film and a common multiaxial warp knitted fabric, the laminating time can be shortened by 40-60%;
(3) and (3) forming quality stability: because the reinforcing material and the resin are bound together, the parallel straightening state of the reinforcing fibers is favorably ensured when the resin flows. Therefore, disturbance of the orientation of the reinforcing fibers can be suppressed to the minimum by the flow of the resin after heating/pressing, thereby improving the accuracy of the fiber orientation. Thus, end users can achieve styling with a variety of physical properties, strength, and stiffness, as desired by designers.
In summary, according to the preparation method of the carbon fiber warp-knitted fabric product provided by the application, the thermoplastic resin film is directly embedded into the carbon fiber warp-knitted fabric and is sewn, the process is simple, the period is short, and the thermoplastic resin can be easily and uniformly infiltrated into the carbon fiber warp-knitted fabric without pre-dipping operation. And, because the carbon fiber warp knitting fabric and the thermoplastic resin membrane are sewed together, the parallel straightening state of the reinforcing fiber is favorably ensured when the resin flows, so that the interference of the orientation of the reinforcing fiber is conveniently suppressed to the minimum by the flow of the resin after heating/pressurizing in the later period, and the precision of the orientation of the fiber is improved. The thermoplastic resin in the obtained carbon fiber warp-knitted fabric product is uniformly soaked in the carbon fiber warp-knitted fabric, and the fiber orientation precision is high. The corresponding production equipment has simple structure and flexible operation.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. 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.

Claims (10)

1. A method for preparing a carbon fiber warp-knitted fabric product is characterized by comprising the following steps: sewing a carbon fiber warp-knitted fabric and a thermoplastic resin film embedded in the carbon fiber warp-knitted fabric;
the carbon fiber warp knitted fabric has at least two carbon fiber warp knitted fabric layers, and at least one layer of the thermoplastic resin film is embedded between at least one set of adjacent two carbon fiber warp knitted fabric layers.
2. The production method according to claim 1, wherein the laying direction of the carbon fiber yarns in each layer of the carbon fiber warp knitted fabric is different;
preferably, the stitching is performed using a stitching mechanism.
3. The production method according to claim 1 or 2, further comprising heating and pressing the sewn preform to impregnate the thermoplastic resin film into the carbon fiber warp knitted fabric layers on both sides of the thermoplastic resin film;
preferably, the heating is performed using a roller heating mechanism.
4. A producing method according to claim 3, further comprising cooling the heated preform;
preferably, the cooling to the temperature of the preform is 15-35 ℃;
preferably, the cooling is performed using a cooling mechanism.
5. A production method according to claim 4, further comprising winding up the preform after cooling;
preferably, the winding is performed by a winding mechanism.
6. A carbon fiber warp knit fabric product obtained by processing the production method according to any one of claims 1 to 5.
7. A carbon fiber warp knit fabric product according to claim 6, characterized in that the grammage of the carbon fiber warp knit fabric product is 75-1600g/m2；
Preferably, in the carbon fiber warp knit fabric product, the weight of the thermoplastic resin film is 20 to 40 wt%, and the weight of the carbon fiber warp knit fabric layer is 60 to 80 wt%.
8. The production equipment of the carbon fiber warp knitted fabric product according to claim 6, characterized by comprising a thermoplastic resin film unwinding mechanism, a carbon fiber warp knitted fabric unwinding mechanism, a sewing mechanism and a conveying mechanism;
the transmission mechanism is used for transmitting the thermoplastic resin film laid by the thermoplastic resin film unwinding mechanism and the carbon fiber yarns laid by the carbon fiber warp-knitted fabric unwinding mechanism;
the sewing mechanism is used for sewing the carbon fiber warp knitting fabric embedded with the thermoplastic resin film and conveyed by the conveying mechanism.
9. The production equipment as claimed in claim 8, wherein the number of carbon fiber warp knitting fabric unwinding mechanisms is at least 2, and 1 thermoplastic resin film unwinding mechanism is arranged between at least one group of adjacent 2 carbon fiber warp knitting fabric unwinding mechanisms;
preferably, the unwinding angles of the adjacent 2 carbon fiber warp knitted fabric unwinding mechanisms are different;
preferably, the carbon fiber warp knitting fabric unwinding mechanism comprises a first carbon fiber warp knitting fabric unwinding mechanism to a fourth carbon fiber warp knitting fabric unwinding mechanism; the thermoplastic resin film unwinding mechanism comprises a first thermoplastic resin film unwinding mechanism to a third thermoplastic resin film unwinding mechanism; the four carbon fiber warp knitting fabric unwinding mechanisms and the three thermoplastic resin film unwinding mechanisms are sequentially arranged in a staggered mode according to the transmission direction;
preferably, the unwinding angle of the first carbon fiber warp knitted fabric unwinding mechanism is-45 degrees to-60 degrees; the unwinding angle of the second carbon fiber warp knitted fabric unwinding mechanism is 90 degrees; the unwinding angle of the third carbon fiber warp knitted fabric unwinding mechanism is +45 degrees to +60 degrees; the unwinding angle of the fourth carbon fiber warp knitted fabric unwinding mechanism is 0 degree.
10. The production facility of claim 9 further comprising a heating mechanism disposed downstream of the stitching mechanism;
preferably, the heating mechanism is a roller heating mechanism;
preferably, the production facility further comprises a cooling mechanism disposed downstream of the heating mechanism;
preferably, the production apparatus further includes a take-up mechanism disposed downstream of the cooling mechanism.
CN202011033806.2A 2020-09-27 2020-09-27 Carbon fiber warp-knitted fabric product and preparation method and production equipment thereof Pending CN112248470A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101466535A (en) * 2006-11-22 2009-06-24 福井县 Thermalplastic resin multi-layer reinforced sheet, production method thereof and forming method for thermalplastic resin composite material forming article
CN202115036U (en) * 2011-06-03 2012-01-18 常州市宏发纵横新材料科技股份有限公司 Multi-axial yarn bundle reinforced thermoplastic preconsolidation sheet
CN106113524A (en) * 2016-06-29 2016-11-16 华东理工大学 A kind of prepreg tape, the loop bonding of mixed fiber yarn fabric and briquetting process thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101466535A (en) * 2006-11-22 2009-06-24 福井县 Thermalplastic resin multi-layer reinforced sheet, production method thereof and forming method for thermalplastic resin composite material forming article
CN202115036U (en) * 2011-06-03 2012-01-18 常州市宏发纵横新材料科技股份有限公司 Multi-axial yarn bundle reinforced thermoplastic preconsolidation sheet
CN106113524A (en) * 2016-06-29 2016-11-16 华东理工大学 A kind of prepreg tape, the loop bonding of mixed fiber yarn fabric and briquetting process thereof

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