KR101961103B1 - Carbon riber and mesh structure tight processing carbon fiber prepreg and manufacturing method of the same - Google Patents

Abstract

The present invention relates to a carbon fiber fabric prepreg in which a carbon fiber fabric and a metal net structure are closely contacted, and more particularly, to a carbon fiber fabric prepreg having a metal net structure attached to a carbon fiber fabric, To a carbon fiber fabric prepreg in which a carbon fiber fabric and a metal net structure are closely contacted, and a method of manufacturing the carbon fiber fabric prepreg.
A method for manufacturing a carbon fiber fabric prepreg in which a carbon fiber fabric and a metal net structure are closely contacted with each other is characterized in that a metal having a predetermined diameter is crossed with a metal composed of a plurality of strands to form a net- (PE), polyvinyl chloride (PVC), polypropylene (PP), and polystyrene (PS), which are made of a thermoplastic resin, ), A polyacrylonitrile, a styrene-acrylonitrile (SAN), an acrylonitrile-butadiene-styrene (ABS), a polymethyl methacrylate (PMMA), a polytetrafluoroethylene (PTFE Teflon), or a polycaprolactone (PCL) impregnation bath to impregnate the thermoplastic resin Or a metal mesh net covered with the thermoplastic resin on the outer circumferential surface to apply heat to the net made of the thermoplastic resin, The thermoplastic resin is adhered to the outside of the metal mesh by melting the metal part to improve the strength of the core material and to maintain the shape of the core material so that the structure can be easily formed, When the thermoplastic resin is adhered, the thermoplastic resin solution contained in the thermoplastic resin impregnation tank is diluted with a solvent called tetrahydrofuran (THF), and the thermoplastic resin is diluted with a diluted solution of tetrahydrofuran And the diameter of the cross section of the core material becomes uniform, or the diameter of the cross section of the core material becomes uniform or the cross section of the metal material coated with the thermoplastic resin on the outer circumferential surface The resulting network (S20) of attaching the thermoplastic resin melt to the outside of the metal by melting the thermoplastic resin in a mesh made of the metal by heating with a heating body of a microwave oven, (S30) of the first carbon fiber fabric fabric to the belt; and feeding a second web of rubber material comprising the thermoplastic resin coated metal onto the first carbon fiber fabric, (S50) of supplying a solvent or a film made of a polymer resin to the metal mesh network coated with the thermoplastic resin (s50); and a step The metal mesh net coated with the thermoplastic resin and the carbon fiber fabric (S60) of providing a second carbon fiber fabric on a first carbon fiber fabric fabric on a bonded body, the first carbon fiber fabric, the thermoplastic resin coated metal, and the second carbon fiber fabric Performing surface drying (s70) on the superimposed aggregate; And a step (s80) of pressing and curing the aggregate of the first carbon fiber fabric fabric, the metal mesh net coated with the thermoplastic resin and the second carbon fiber fabric fabric by a third press (s80).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a carbon fiber fabric prepreg and a carbon fiber fabric prepreg,

The present invention relates to a carbon fiber fabric prepreg in which a carbon fiber fabric and a metal net structure are closely contacted, and more particularly, to a carbon fiber fabric prepreg which is formed by adhering a metal net structure to a carbon fiber fabric to maintain its shape, A metal netting structure formed by a method of curing by a method of post-curing, and a carbon fiber fabric prepreg in which a resin is closely contacted, and a method of manufacturing the carbon fiber fabric prepreg.

Carbon fiber-reinforced composites have been used not only in the aerospace industry, but also in the high technological fields related to nuclear and general technology, and in transportation such as bearings, gears, cams, automobile bodies, In recent years, the application range has expanded into various fields such as electric, electronic, materials, civil engineering, building materials, automobiles, ships, military equipment, sports goods, and has attracted attention as a promising new material.

Since the presence of air bubbles remaining in the inside of the carbon fiber fabric reinforced composite material seriously affects the mechanical properties of the final composite material, the curing of the method such as autoclave or vacuum bag molding And the residual internal bubbles are removed using the pressure difference in the process.

Further, when a thermosetting resin is used as a matrix, the curing temperature is generally 150 ° C or higher, and as a result, the viscosity of the internal resin becomes very low. This lowered resin will escape to the outside through breather due to the pressure difference, and if excess resin is escaped, it will lead to deterioration of the physical properties of the composite material. Therefore, -stage) to prevent excess resin removal during high-temperature curing.

When the carbon fiber fabric is a long fiber-type carbon fiber fabric, the carbon fiber fabric is impregnated with a resin such as epoxy resin by filament winding, semi-cured, and cut to a predetermined size. However, it is very difficult to confirm the semi-cured state because a specific resin exhibits properties of a pseudo plastic which does not exhibit adhesiveness at room temperature. When the resin is misidentified as a semi-cured state and subjected to high-temperature curing in this manner, the viscosity of the resin during curing sharply drops, resulting in deterioration of physical properties due to excessive removal of the internal resin.

Polymer composites are useful materials with new properties that can not be obtained from each material by mixing two or more materials with different properties. Polymer composites can be classified as reinforcing materials and matrix materials. The stiffener has fiber particles depending on the shape, and the most widely used fiber in the polymer composite material is glass fiber, carbon fiber fabric, and the like.

 Matrix materials are classified into thermosetting resins and thermoplastic resins. Polyester resins and epoxy resins are most widely used as thermosetting resins.

In order to actively apply composite materials to various fields, it is necessary to make balanced choices that satisfy the highest performance, lower product price, and higher productivity.

There are many different ways to produce polymer composites, but all processes involve several common basic steps. The common step is a step of forming a reinforcing fiber so as to have a specific product shape and a fine structure, a step of impregnating the fiber reinforcing material with a polymer resin, and a step in which the resin is cured (solidified) while the shape is maintained by a mold or the like.

The fiber-reinforced structure can be divided into a linear type, a linear type, a two-dimensional and a three-dimensional type, and different types of composite materials are used.

The impregnation of the reinforcing fibers may take place in the form of a prepreg impregnated with the resin prior to the production of the product, or by resin injection when the product is molded. Commonly used thermoset prepregs are slightly sticky, partially cured tow, tape, or sheet. In the impregnation process, a process of laminating a desired product shape and thickness is used.

In the impregnation step in the case of using a thermosetting resin, the reinforcing fiber is prepared in accordance with the shape of the product and then impregnated or injected with a resin curing agent additive.

The process of solidifying the resin-impregnated fiber reinforcement occurs by a chemical reaction process in the case of a thermosetting resin and by a cooling process in the case of a thermoplastic resin.

There are a wide variety of manufacturing processes depending on the reinforcing fiber structure and resin selection.

Examples of the molding process of the composite material include RTM (Resin Transfer Molding), autoclave molding, automatic fiber lamination molding, filament winding molding, and preform textile molding.

The Resin Transfer Molding process involves pre-laminating a dry mat-free reinforcement in the male and female molds, applying pressure to the resin (mainly a thermosetting resin), impregnating the fiber mat, and heating It is the process of manufacturing the product. Conventional composite material manufacturing process has a long molding time and labor-intensive characteristics, while RTM molding is easy to integrate parts and shorten molding time because of convenience of work.

The autoclave molding method is a molding method used when manufacturing aerospace composites requiring higher quality than productivity. The autoclave molding method is basically based on a vacuum bag molding process. The material used in the vacuum blank forming process is a laminated material obtained by laminating a prepreg prepared by impregnating a resin with a resin in advance into a sheet form.

In the vacuum blanking process, a release film is used on the surface of the mold to prevent the resin coming from the prepreg from sticking to the mold. The prepreg to be manufactured is placed on the release film. On the prepreg, a cloth called a peel ply is placed, which is used to control the surface roughness of the composite material or to prevent surface contamination until the composite material is joined, It also provides surface roughness.

Place a bleeder on the fill-ply to absorb the resin, and then use the release film again on the fill-ply. On the release film, a breather is used as the air flow passage inside the vacuum chamber, and the entire film is covered with a bagging film serving as a vacuum chamber. The autoclave molding method has a vacuum line which is necessary for the vacuum blanking process as a device for adjusting the temperature and supplying the pressure required for pressing the resin in the vacuum blank forming process.

In the filament winding technology, the shape and size of the composites that can be manufactured have greatly expanded compared with the past due to the development of various winding programs and computer numerical control technology. We are developing high-performance pressure vessels and asymmetric parts (pipe elbow or curved shape) using a winding machine with maximum 6-axis motion control. We have developed robot technology to manufacture products with more complex shapes. Axial motion control machines are also being developed. In order to maximize productivity, a winding auxiliary device capable of using 50K carbon fiber having a large amount of fibers instead of the conventional 12k carbon fiber has also been developed.

In order to maintain the shape with only carbon fiber fabric, a basic matrix is required, and the resin is usually impregnated during the processing. However, a carbon fiber fabric prepreg and a method for manufacturing the carbon fiber fabric prepreg have not yet been developed.

It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a carbon fiber fabric having a basic shape in order to maintain its shape only by a fabric of a carbon fiber fabric. The present invention is to provide a carbon fiber fabric prepreg which can maintain a fixed shape by bending and cutting and can produce a carbon fiber fabric product without the use of a mold only by an additional process (hardener impregnation process), and a manufacturing method thereof.

According to another aspect of the present invention, there is provided a method of manufacturing a carbon fiber fabric prepreg in which a carbon fiber fabric and a metal net structure are closely contacted to each other by weaving a metal having a plurality of strands, (PE), polyvinyl chloride (PVC), polypropylene (PP), polypropylene (PP), and the like, (PP), polystyrene (PS), polyacrylonitrile, styrene-acrylonitrile (SAN), acrylonitrile-butadiene-styrene (ABS), polymethyl methacrylate (PMMA), polytetrafluroethylene (PTFE Teflon), or polycaprolactone Or by impregnating the thermoplastic resin or by applying heat to a rim made of a metal mesh network coated on the outer surface with the thermoplastic resin, The thermoplastic resin is adhered to the outside of the metal mesh by melting the coating part made of the plastic resin so that the core material can be manufactured to improve the strength of the core material and to maintain the reticulated form as it is so that the structure can be easily formed, The thermoplastic resin solution contained in the thermoplastic resin impregnation tank is diluted with a solvent called tetrahydrofuran (THF), and the diluted solution of tetrahydrofuran The thermoplastic resin is easily impregnated between a plurality of metals constituting the mesh, dried and impregnated with the thermoplastic resin, the diameter of the mesh becomes uniform, the diameter of the cross section of the core becomes uniform, or the thermoplastic resin coating (S20) of attaching the thermoplastic resin melt to the outside of the metal by melting the thermoplastic resin into a net made of the metal by heating the net made of metal with a heating body of a microwave oven, (S30) on the first carbon fiber fabric fabric through a first roller and a conveyor belt to the conveyor belt; and feeding the second roller with a net made of a metal coated with the thermoplastic resin on the first carbon fiber fabric, (S40) of binding the fabric fabric with a network made of a metal coated with the thermoplastic resin; (s50) supplying a solvent or a film made of a polymer resin to the metal mesh network coated with the thermoplastic resin; And a metal mesh net coated with the thermoplastic resin supplied with the polymer resin (S60) a second carbon fiber fabric fabric on a first carbon fiber fabric fabric on a bonded body of a first carbon fiber fabric, a first carbon fiber fabric, a metal coated with the thermoplastic resin, and Performing surface drying (s70) on the aggregated second carbon fiber fabric fabric; And a step (s80) of pressing and curing the aggregate of the first carbon fiber fabric fabric, the metal netting net coated with the thermoplastic resin and the second carbon fiber fabric fabric by a third press (s80).

In the embodiment of the present invention, the carbon fiber fabric prepreg in which the first carbon fiber fabric fabric, the thermoplastic resin-coated metal net network, and the second carbon fiber fabric are combined, the polycaprolactone- Rigidity and flexibility can be adjusted by the diameter of the mesh net constituting the metal net mesh and the size of the rectangular mesh pore constituting the metal net mesh.

A carbon fiber fabric prepreg having a carbon fiber fabric and a metal net structure in close contact with each other according to an embodiment of the present invention includes first and second carbon fiber fabric fabrics as outer materials and the two first and second carbon fibers The fabric may be a structure in which a metal net made of a plurality of strands is interwoven in an impregnation solution in which the thermoplastic resin is dissolved in a solvent called tetrahydrofuran and coated on a metal mesh net formed by intersecting metals having a constant diameter, A structure in which a metal mesh network made up of a plurality of resin coated strands is heated and cured by a microwave oven may be integrated through a process of pressurization and drying.

Further, in the embodiment of the present invention, a bonding strength between the metal netted mesh coated with the thermoplastic resin and the first carbon fiber fabric is improved between the metal netting net coated with the thermoplastic resin and the first carbon fiber fabric, And a film layer made of a polymer resin.

The carbon fiber fabric prepreg made by closely contacting the carbon fiber fabric and the mesh structure according to the present invention as described above is brought into close contact with the carbon fiber fabric fabric or the prepreg with the net structure to form a metal mesh as a core, And the formed shape is fixed so that the shape can be maintained until the hardening agent hardens.

The network structure has a wider area such as a carbon fiber fabric, which allows various shapes to be formed during manual and press processing.

1 is a view showing a configuration of a one-way semi-prepreg according to an embodiment of the present invention
FIG. 2 is a view showing a configuration of a fabric-type fabric according to an embodiment of the present invention.
3 is a view showing a configuration of a fabric according to an embodiment of the present invention.
4 is a cross-sectional view illustrating a carbon fiber fabric prepreg in which a carbon fiber fabric and a metal net structure are closely contacted according to an embodiment of the present invention.
5 is a view showing a process of manufacturing a carbon fiber fabric prepreg by closely contacting a carbon fiber fabric and a metal net structure according to an embodiment of the present invention.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

The carbon fiber fabric reinforced composite material is a non-uniform material having reinforcing fiber carbon fiber fabric and matrix resin as essential components, and there is a great difference in physical properties in the arrangement direction of the carbon fiber fabric and other directions. For example, the impact resistance, which is represented by the resistance to falloff impact dominated by interlaminar fracture toughness or interlaminar fracture toughness of a carbon fiber fabric reinforced composite, is not associated with a dramatic improvement only by increasing the strength of the reinforcing fiber .

In particular, a carbon fiber fabric reinforced composite material having a thermosetting resin as a matrix resin reflects low toughness of the matrix resin and has a property of being easily broken by stress from the direction other than the arrangement direction of the reinforcing fibers. Therefore, various techniques have been proposed for the purpose of improving the physical properties of the carbon fiber fabric reinforcing composite material capable of coping with stress from the direction other than the arrangement direction of the reinforcing fibers.

As one of such methods, there has been proposed a carbon fiber-reinforced composite material in which the interlaminar fracture toughness is improved by using prepregs or preforms in which thermoplastic resin particles, fibers, or films are disposed on the surface, thereby improving the compressive strength after the dropping impact.

However, when a thermoplastic resin is used as an interlayer reinforcement material, a high interlaminar fracture toughness is imparted, while a low strength layer is formed between layers, resulting in a decrease in static strength. In addition, the interfacial adhesion between the thermosetting resin and the thermoplastic resin becomes insufficient, and breakdown due to interface delamination proceeds and the effect of improving the interlaminar fracture toughness is insufficient. Further, since the resin layer serving as an insulating layer is present between the layers, the conductivity in the thickness direction of the conductive material, which is one of the characteristics of the carbon fiber-reinforced composite material, is remarkably lowered.

Static strength refers to the stress required to fracture a carbon fiber fabric reinforced composite when subjected to bending or tensile forces. For example, 0-degree bending strength or 0-degree tensile strength can be given.

The prepreg is a high-tech material that is stronger than steel and lighter than aluminum, and is used in various industries. A prepreg is an abbreviation of preimpregnated materials. It is a sheet type product in which a matrix is pre-impregnated with Reinforced Fiber. It is an intermediate material for composite products.

As the reinforcing fiber, mainly carbon fiber fabric, glass fiber, aramid fiber and the like are used, and epoxy resin, polyester resin, thermoplastic resin and the like are used as a binder. The prepregs form a diverse family of products depending on the type of fibers, the arrangement of the fibers, and the type of binder used.

 Generally, the curing of the thermosetting resin used in the prepreg proceeds in the following three stages of A, B, and C-Stage. Here, A-stage refers to a state in which the curing reaction does not proceed at all in a state where the resin and the curing material are simply mixed according to the blending ratio. The B-stage refers to a state in which the resin and the hardening material react to some extent to increase the viscosity so that they are not dissolved by the solvent but are melted by the heat to form a flow.

C-stage refers to the stage where the reaction between the resin and the hardened material is almost completed or completed, and is not affected by the solvent or heat, and the hardening of the material takes place. In this way, the prepreg is made up of a combination of resin matrix and fiber, which means a product ready for use in the production process of the product.

1 is a view showing a configuration of a prepreg using a unidirectional carbon fiber fabric among carbon fiber fabric prepregs according to an embodiment of the present invention.

Referring to FIG. 1, a unidirectional semi-prepreg sheet is formed. The unidirectional semi-prepreg may be formed by wrapping the unidirectional semi-prepreg on a support base 110, have. The silicon paper protective layer 120 covers the top and bottom surfaces of the unidirectional carbon fiber monolayer 130 and can be made thinner than the fabric type prepreg which will be described later. It is also known that the impregnation property to a solvent is excellent.

2 is a view showing a configuration of a fabric prepreg in a carbon fiber fabric prepreg according to an embodiment of the present invention.

Referring to FIG. 2, the polyethylene protective layer 140 may be wrapped around a support 110. The polyethylene protective layer 140 may be formed in a fabric-like shape capable of changing patterns according to weaving, It can be seen that the weft-type fiber layer 150 is disposed.

In this prepreg manufacturing method, a solvent prepreg process in which a resin as a base material is liquid, a fiber or a fabric as a reinforcing material is impregnated, and a hot melt process in which a resin is formed into a film form and impregnated into a stiffener have.

3 is a view showing a configuration of a carbon fiber fabric prepreg according to an embodiment of the present invention.

Referring to FIG. 3, a carbon fiber fabric prepreg includes a first and second carbon fiber fabric fabrics 210 and 220 as a sheathing material, and between the two first and second carbon fiber fabric fabrics 210 and 220 Polypropylene (PP), polystyrene (PS), polyacrylonitrile, styrene-acrylonitrile (SAN), acrylonitrile-butadiene-styrene (ABS), polymethyl (wires) having a predetermined diameter are interwoven with a metal (for example, a wire) composed of a plurality of strands in an impregnation solution in which metacrylate (PMMA), polytetrafluoroethylene (PTFE Teflon) and polycaprolactone are dissolved in a solvent called tetrahydrofuran, Or a metal net network composed of a plurality of strands coated with the polycaprolactone on the outer circumferential surface, a structure 230 which is thermally cured by a microwave oven can be applied to the metal net- It may be integrated through the process of pressure and drying.

3, the first carbon fiber fabric 210 and the first metal fiber net fabric 230 coated with the polycaprolactone are coated with the first carbon fiber fabric 210, And a film layer 240 made of a polymer resin capable of improving bonding strength in a pressing process and a drying process of the metal mesh network 230 coated with the polycaprolactone. The film layer 240 made of the polymer resin may be supplied in the form of a film as described above. However, when the polycaprolactone formed on the second carbon fiber fabric fabric 220 layer in the form of a solution (coating) So that the binding force with the first carbon fiber fabric fabric 210 described above can be increased.

4 is a cross-sectional view showing a carbon fiber fabric prepreg in which a carbon fiber fabric and a metal net structure are closely contacted according to an embodiment of the present invention.

Referring to FIG. 4, the carbon fiber fabric prepreg can include, as an outer layer, a first carbon fiber fabric fabric 210 and a second carbon fiber fabric fabric 220. A metal mesh can be formed between the first and second carbon fiber fabric fabrics 210 and 220 to maintain and support the shape of the carbon fiber fabric prepreg. The metal mesh body may be a mesh structure formed by weaving a plurality of metal strands and crossing metals having a predetermined diameter. For example, the metal netting mesh may be a wire mesh netting.

The strength and flexibility of the carbon fiber fabric prepreg thus formed can be determined according to the diameter of the network constituting the metal mesh network coated with polycaprolactone. In principle, a carbon fiber fabric can not maintain its strength, so a matrix that can serve as a basic medium may be required to maintain its shape.

Generally, impregnation is often used for fibrous materials in order to maintain such a shape. In the present invention, a fibrous material called polycaprolactone is impregnated into a metal mesh network using impregnation process. And can be coated on the metal mesh network.

The metal cap 230 coated with the polycaprolactone formed between the first and second carbon fiber fabric fabrics 210 and 220 thus formed has a diameter that is smaller than the diameter of the network constituting the metal mesh network coated with the polycaprolactone Rigidity and flexibility can be adjusted by the size of the rectangular pores constituting the metal mesh network.

Since the carbon fiber fabric prepreg having the carbon fiber fabric and the metal net structure having such a structure in tight contact with each other is smoothly warped while maintaining a constant thickness and rigidity, By reducing the pressing process, excellent mechanical properties can be demonstrated.

Hereinafter, a method of manufacturing a carbon fiber fabric prepreg in which a carbon fiber fabric and a mesh structure are closely contacted according to an embodiment of the present invention is as follows.

5 is a view showing a process of manufacturing a carbon fiber fabric prepreg according to an embodiment of the present invention.

Referring to FIG. 5, the first step (s10) may be referred to as a network formation step. In this step, a plurality of metal wires (for example, wire) may be woven together and metal having a predetermined diameter may be crossed with each other to form a net-like net. As a material for forming such a network, a general yarn, a blended yarn mixed with a polyethylene terephthalate fiber and a polycaprolactone may be used, but it may be difficult to secure a certain strength in such a configuration.

However, if the metallic mesh net 230 coated with polycaprolactone is used as a structure for maintaining the strength as in the embodiment of the present invention, it is cut with scissors at the time of processing, A carbon fiber fabric prepreg can be produced which has a reduced process.

It can be used as a reinforcing material for construction and furniture, especially when it is used as a bonding method.

As described above, it is possible to combine the carbon fiber fabric fabrics 210 and 220 or the metal netting net 230 coated with the polycaprolactone having a net structure on the fabric prepreg to maintain the shape, And then curing it.

Such a metal net-like structure can be formed into a variety of shapes by manual or press-working methods, since the stretched area of the carbon fiber fabric is wide.

In the second step (s20), the metal mesh net made of the metal is impregnated with polycaprolactone in a polycaprolactone impregnation tank, or a metal mesh network coated with polycaprolactone on the outer surface is used, whereby the strength And at the same time, the core material can maintain the shape of the ridge shape, so that the process of forming the structure 230 can be facilitated.

The core material may be a material in which the thermoplastic resin is attached to the outside of the metal mesh.

 As a method for processing a core material by attaching polycaprolactone to a metal netting network in this manner, there is a method in which a polycaprolactone solution, which is melted by a solvent, is contained in the inside and a metal is impregnated in a polycaprolactone- A method of attaching polycaprolactone to the outside of a metal netting net by impregnating the netted netting made by the method of the present invention, and secondly, a method of attaching polycaprolactone to the metallic netted body coated with polycaprolactone on the outer circumferential surface by using a heating means such as a microwave oven To attach the polycaprolactone to the outside of the metal mesh network. This second method has the property that, compared to the first method, the polycaprolactone can evenly adhere over the entire outer surface of the metal mesh ridges. As a third method, a metal mesh network is coated with a fiber called polycaprolactone, and the metal mesh network is inserted into a heating means such as a microwave oven to heat the metal mesh network to melt the polycaprolactone fiber to form polycaprolactone .

When the polycaprolactone is adhered to the outside of the metal netting network by impregnation as described above, the solution contained in the polycaprolactone impregnation tank may be diluted with a solvent such as tetrahydrofuran (THF) By the same method, the cross-section of the netted material, that is, the core material after polycaprolactone is easily impregnated and dried and impregnated with polycaprolactone can be made uniform among a plurality of fine metal (wire) constituting the metal net ridgeline.

In this way, it is possible to improve the bonding force with the carbon fiber fabric fabrics 210 and 220 by coating the outer surface of the metal mesh net metallic mesh net with the polycaprolactone, In addition, the mechanical strength can be improved.

After attaching the polycaprolactone in this manner, step (s30) of moving the first carbon fiber fabric fabric 210 to the conveyor belt 400 through the first roller 310, as shown in Figure 5, And a mesh 230 formed of a metal coated with the polycaprolactone on the first carbon fiber fabric fabric 210 is supplied from a second roller 320 and is pressed by a first press 410 to form a first (S40) of a carbon fiber fabric fabric 210 and a network 230 made of a metal coated with a polycaprolactone; and a step (s40) of forming a metal mesh network 230 coated with the polycaprolactone (S50) of supplying a solvent or a film 240 onto the first carbon fiber fabric fabric 210 and a metal mesh network 230 coated with the polymer resin, Supplying 2 carbon fiber fabric (220) And the second carbon fiber fabric fabric 220 is subjected to surface drying on the first carbon fiber fabric fabric 210, the metal cap 230 coated with polycaprolactone, and the second carbon fiber fabric fabric 220 (S70); And pressing and curing the aggregate of the first carbon fiber fabric fabric 210, the metal mesh network 230 coated with polycaprolactone and the second carbon fiber fabric fabric 220 by the third press 430, (s80). For example, an epoxy resin can be used as the polymer resin.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

110: support 120: silicone paper protective layer
130: Unidirectional fiber layer 140: Polyethylene protective layer
150: a woven fabric layer 210: a first carbon fiber fabric
220: second carbon fiber fabric 230: structure (metal net network metal net network)
240: polymer fiber film

Claims (4)

(S10) for forming a core material by forming meshes of a net shape by interweaving metal having a predetermined diameter by weaving a plurality of strands of metal;
The network formed by the step of forming the network is filled with a thermoplastic resin such as polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), polystyrene (PS), polyacrylonitrile, styrene- acrylonitrile (SAN), acrylonitrile-butadiene- ), Polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE Teflon), or polycaprolactone (PCL) impregnation bath to impregnate the thermoplastic resin, or to impregnate the thermoplastic resin with a thermoplastic resin, The thermoplastic resin is adhered to the outside of the metal mesh by applying heat to melt the coating part made of the thermoplastic resin so as to improve the strength of the core and to maintain the shape of the core, When the thermoplastic resin is adhered to the outside of the metal, The thermoplastic resin solution contained in the plastic resin impregnation tank is diluted with a solvent such as tetrahydrofuran (THF), and the thermoplastic resin is diluted with a diluent solution such as tetrahydrofuran to form a plurality of metals And the diameter of the cross section of the core material is made uniform or the mesh made of the metal coated with the thermoplastic resin on the outer circumferential surface is heated by the heating of the microwave oven (S20) of attaching the thermoplastic resin melt to the outside of the metal by melting the thermoplastic resin in a mesh made of the metal by heating with a sieve;
Moving the first carbon fiber fabric to the conveyor belt through the first roller (s30);
A net made of a metal coated with the thermoplastic resin on the first carbon fiber fabric fabric is supplied from a second roller and pressurized by a first press to bind a carbon fiber fabric and a mesh made of a metal coated with the thermoplastic resin Step s40;
(S50) supplying a solvent or a film made of a polymer resin to the metal mesh net covered with the thermoplastic resin;
(S60) supplying a second carbon fiber fabric on the first carbon fiber fabric, onto the thermoplastic resin-coated metal mesh net and the carbon fiber fabric, which are supplied with the polymer resin;
Performing surface drying (s70) on the aggregate of the first carbon fiber fabric, the thermoplastic resin coated metal, and the second carbon fiber fabric; And
(S80) pressing and curing the aggregate of the first carbon fiber fabric fabric, the metal netting net coated with the thermoplastic resin and the second carbon fiber fabric fabric by a third press (s80) And a metal net structure are closely contacted with each other to produce a carbon fiber fabric prepreg. The method according to claim 1,
A carbon fiber fabric prepreg in which the first carbon fiber fabric fabric, the poly (ethylacrylate) -coated metal mesh netting and the second carbon fiber fabric are combined,
Characterized in that rigidity and flexibility are controlled by the diameter of the mesh net constituting the metal net mesh coated with the polycaprolactone and the size of the rectangular mesh net constituting the metal net mesh net mesh net, A method for manufacturing a carbon fiber fabric prepreg in which a structure is closely contacted. delete delete

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