KR101811995B1 - An electrically conductive fabric comprising metal-plated glass fiber, a process for preparing the same, a process for preparing a FRP prepreg using the same - Google Patents

Abstract

The present invention relates to a process for preparing (a) an electroless plating solution comprising a metal salt, a reducing agent and a complexing agent, and a glass fiber in the form of a continuous yarn (CONTINUOUS FIBER) in which the filaments are bundled into one bundle ) Forming a metal plating layer on the surface of the glass fiber through a chemical reduction reaction using an electroless plating solution, (c) forming a metal plating layer on the glass fiber on which the metal plating layer is formed, A metal-plated glass fiber heat treatment step for improving the interfacial bonding force by causing fusion between the surface of the metal-plated glass fiber and the metal plating layer and for performing heat treatment so as to remove impurities present in the metal plating layer, (d) A sizing treatment step of performing a silane coating treatment on the surface of the substrate; and (e) a step of (a) Using the speed of gold glass fibers to prepare the electromagnetic shielding metal-coated glass fiber fabric electrically conductive; a method for producing an electrically conductive fabric comprising a metal-coated glass fiber including a.
In addition, the present invention provides a method for producing a glass fiber, comprising the steps of: (a) preparing an electroless plating solution and a glass fiber cloth including a metal salt, a reducing agent and a complexing agent; (b) (C) a step of forming a metal plating layer through the step of forming a metal plating layer, fusion bonding is made between the surface of the glass fiber on which the metal plating layer is formed and the metal plating layer to improve the interfacial adhesion force A metal plating glass fiber heat treatment step of performing heat treatment so as to remove impurities present in the metal plating layer, and (d) a sizing treatment step of performing a silane coating treatment on the surface of the heat-treated metal- To a method of making an electrically conductive fabric comprising fibers.
The present invention also provides a prepreg for a fiber-reinforced composite material, which is produced by a method for producing an electrically conductive fabric comprising metal-plated glass fibers.

Description

TECHNICAL FIELD [0001] The present invention relates to an electroconductive fabric comprising metal-plated glass fibers, a method for producing the same, and a prepreg for a fiber-reinforced composite material manufactured using the same, FRP prepreg using the same}

The present invention relates to a method of manufacturing a semiconductor device comprising the steps of depositing nickel (Ni), copper (Cu), tin (Sn), zinc (Zn), gold (Au), silver (Ag), lead (Pb), aluminum (Al), cobalt Cr), and a prepreg for a fiber-reinforced composite fabricated using the same. More particularly, the present invention relates to an electroconductive fabric comprising glass-plated glass fibers such as glass, It is possible to increase the purity of the metal plating layer to improve electrical conductivity and electromagnetic shielding ability and to enhance the mechanical strength of bonding with the polymer resin due to the surface embossing effect of the metal plating layer. And a prepreg for a fiber-reinforced composite material produced using the same.

In recent years, the demand for electromagnetic waves has increased due to the remarkable development of information technology. Wireless communication that uses electromagnetic waves as a communication medium is one of important living and industrial bases in modern society, making full use of the characteristics of electromagnetic waves that can transmit information immediately over time and distance.

However, if the electric and electronic devices are not resistant to the environment in such electromagnetic environment, it may cause malfunction or failure.

In addition, when the living body is exposed to a strong electromagnetic field, a biological side effect such as a rise in deep body temperature due to electromagnetic energy or a nerve caused by current shock or muscle excitation may occur.

On the other hand, in recent years, the housing of the electronic device has been shifted from the metal to the plastic system in accordance with the demand for lighter weight.

When plastics introduction is applied, there is a slight advantage over metals. However, since plastic is an insulator without electricity, there is no electromagnetic shielding ability.

For this reason, the technology development and demand for the electromagnetic shielding ability of the plastic housing material is increasing.

In accordance with the above-mentioned circumstances, the conventional art has conventionally used a method of imparting conductivity to plastics to impart electromagnetic wave shielding ability.

For example, a method of incorporating glass fibers and graphite particles capable of absorbing electromagnetic waves is disclosed.

The prior art has a technical limitation in that it is limited to improving the interfacial bonding force with the resin by using the electroless plating method.

On the other hand, in the case of the housing of the electronic equipment, not only the electromagnetic wave shielding ability but also the strength against the external impact are required.

Thus, there has been a need for a fibrous filler having a high aspect ratio.

For this reason, development has been made in the direction of improving mechanical strength and electromagnetic shielding performance by using glass fiber as a leadfill to improve strength, plating metal directly on glass fiber, and using it as a filler.

However, when such a method of incorporating metal particles is used, it is difficult to uniformly disperse the whole of the polymer resin due to the high density of the metal particles, so that the physical properties of the composite material to be finally produced can be lowered.

Therefore, research and development using metal as a filler on the surface of glass fiber was sought.

However, when fabricating the fiber-reinforced plastic composite material using the metal-plated glass fiber as described above, the metal plating layer is often separated from the glass fiber due to the frictional force with the polymer resin, resulting in difficulty in actual application.

Methods for producing a metal film by reducing and depositing metal ions from the metal salt solution on the object to be plated and producing highly conductive glass fibers include an electrolytic plating method in which electrolytic deposition is performed by external electric power, a chemical reduction method in which metal ions in a solution are reduced and precipitated by a chemical agent A plating method and a displacement plating method in which metal ions in a solution are displaced and precipitated through water as a plated body.

Here, in the case of the electrolytic plating method, the base layer must be a conductor, and there is a problem that the thickness becomes uneven in the surface phenomenon of the base layer due to the influence of the current density.

Further, when the electrolytic plating method is used in a complicated shape, uniform plating is difficult. In addition, when the glass fiber is plated with metal and mixed with the polymer to produce a composite material, the metal plating layer is peeled off due to the friction with the polymer, thereby deteriorating the physical properties of the composite material.

In order to solve such a problem, a technique has been sought for a metal-plated glass fiber for electromagnetic wave shielding which prevents the phenomenon of peeling of the metal plating layer and which has excellent physical properties of the composite material finally produced.

An invention such as that disclosed in Korean Patent Laid-Open Publication No. 2002-0063465 (Title of the Invention: Method for manufacturing upper layer having electromagnetic wave absorption and deodorization function) has been proposed by the prior art.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to improve the electrical conductivity and electromagnetic wave shielding ability by increasing the purity of the metal plating layer while reducing the peeling phenomenon through the high interfacial bonding force of the glass fiber- Electro-conductive fabric including glass-fiber reinforced metal-plated purity and metal bonding strength capable of increasing the mechanical bonding strength with polymer resin by the effect of embossing on the surface of plated layer, and electromagnetic wave shielding fiber reinforced composite And to provide a prepreg for reuse (PREPREG).

In order to solve the above-mentioned problems, the present invention provides a method for producing a glass fiber, comprising: (a) an electroless plating solution containing a metal salt, a reducing agent and a complexing agent, and a glass fiber in the form of a continuous fiber (CONINUOUS FIBER) Preparing to prepare; (b) forming a metal plating layer on the surface of the glass fiber through a chemical reduction reaction using the electroless plating solution; (c) fusion bonding is performed between the surface of the glass fiber on which the metal plating layer is formed and the metal plating layer with respect to the glass fiber on which the metal plating layer is formed through the metal plating layer formation step to improve the interfacial adhesion force, A metal-plated glass fiber heat treatment step of performing heat treatment so as to remove impurities present; (d) a sizing treatment step of performing silane coating treatment on the metal-plated glass fiber subjected to the heat treatment step; And (e) fabricating a metal-plated glass fiber electroconductive fabric for electromagnetic wave shielding using metal-plated glass fibers having enhanced purity and metal bonding strength through the steps (a) to (d) A method of manufacturing an electrically conductive fabric including glass fiber can be provided.

The present invention also relates to a method for manufacturing an electroless plating solution, comprising the steps of: (a) preparing an electroless plating solution and a glass fiber cloth including a metal salt, a reducing agent and a complexing agent; (b) forming a metal plating layer on the surface of the glass fiber through a chemical reduction reaction using the electroless plating solution; (c) fusion bonding is performed between the surface of the glass fiber on which the metal plating layer is formed and the metal plating layer with respect to the glass fiber on which the metal plating layer is formed through the metal plating layer formation step to improve the interfacial adhesion force, A metal-plated glass fiber heat treatment step of performing heat treatment so as to remove impurities present; And (d) a sizing treatment step of performing a silane coating treatment on the metal plated glass fibers subjected to the heat treatment step.

The metal salt may be at least one selected from the group consisting of a nickel salt, a copper salt, a tin salt, a zinc salt, a gold salt, a silver salt, a lead salt, , Cobalt (Co) salt and chromium (Cr) salt.

The electroless plating solution may have a pH of 2 to 11.

In the step (c), the heat treatment may be performed at a temperature of 300 to 800 degrees Celsius for 5 minutes to 60 minutes.

After the step (c), the metal content in the plated metal plating layer on the surface of the glass fiber may be 95 wt% or more.

After step (c), the metal plated glass fibers may have electrical conductivity of 1 x 10 ³ (S / cm) to 6 x 10 ⁵ (S / cm).

The sizing treatment may be performed using a dilute solution using at least one silane selected from the group consisting of Amino-silane, Epoxy-silane, Methacrylate-silane, Vinyl-silane, Alkyl-silane and Phenyl- Plated glass fiber surfaces can be coated.

It is also possible to provide an electroconductive fabric comprising metal plated glass fibers produced by the method of making an electroconductive fabric comprising metal plated glass fibers.

Further, it is possible to provide a prepreg characterized by being produced by impregnating a thermosetting resin into an electrically conductive fabric comprising metal-plated glass fibers.

Further, it is possible to provide a prepreg characterized by being produced by impregnating an electrically conductive fabric comprising metal-plated glass fibers with a thermoplastic resin.

According to an embodiment of the present invention, an electroconductive fabric comprising metal-plated glass fibers and a prepreg for an electromagnetic-shielding fiber-reinforced composite material manufactured using the same can be used as a molding material for a fiber-reinforced plastic component for shielding electromagnetic waves.

Further, the interfacial bonding force with the thermosetting resin can be increased due to the improvement of the interfacial adhesion between the glass fiber and the metal plating layer and the embossing effect of the surface of the metal plating layer by the heat treatment step of the metal-plated glass fiber of the present invention. Accordingly, the strength of the fiber-reinforced plastic part manufactured using the electroconductive fabric including the metal-plated glass fiber and the prepreg for the electromagnetic-shielding fiber-reinforced composite manufactured using the same can be increased as a whole.

In addition, the present invention can improve the metal purity of the metal plating layer to be finally produced, and can have a relatively high electrical conductivity, as compared with the conventional chemically reduced metal plated glass fiber for use as an electromagnetic shielding material.

In addition, the present invention has an effect of preventing the peeling of the metal plating layer, which may occur, when the fiber-reinforced plastic using the metal-plated glass fiber is produced by increasing the interfacial bonding strength between the glass fiber surface and the metal plating layer.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photograph showing a cross section of electroless nickel plated glass fiber produced according to the method of manufacturing a metal-plated glass fiber with enhanced purity and metal bonding strength according to an embodiment of the present invention.
FIG. 2A and FIG. 2B are photographs showing a process of changing the surface shape of the heat-treated nickel-plated glass fiber produced according to the method of manufacturing the metal-plated glass fiber with enhanced purity and metal bonding strength according to the embodiment of the present invention.
3 is a photograph showing the principle of surface shape change of the heat-treated nickel plated glass fiber produced according to the method of manufacturing the metal-plated glass fiber with enhanced purity and metal bonding strength according to the embodiment of the present invention.
4 is a photograph showing interfacial bonding state between glass fiber and nickel layer after heat treatment, which is produced according to the method of manufacturing a metal-plated glass fiber having enhanced purity and metal bonding strength according to an embodiment of the present invention.
FIG. 5 is a schematic view showing the principle in which the interfacial fusion state of FIG. 4 is formed; FIG.
FIG. 6 is a graph showing a pattern of electromagnetic shielding ability of a nickel-plated glass fiber or polymer composite according to a heat treatment manufactured according to a method of manufacturing a metal-plated glass fiber having enhanced purity and metal bonding strength according to an embodiment of the present invention.
7 is a flowchart showing a method of manufacturing an electrically conductive fabric including metal-plated glass fibers according to Example 1 of the present invention.
8 is a flowchart showing a method of manufacturing an electrically conductive fabric including metal-plated glass fibers according to Embodiment 2 of the present invention.
9 is a flowchart showing a method of manufacturing a thermosetting prepreg for a fiber-reinforced composite material produced using an electroconductive fabric comprising metal-plated glass fibers produced according to Example 1 or Example 2 of the present invention.
10 is a flowchart showing a method of manufacturing a thermoplastic prepreg for a fiber-reinforced composite material produced using an electrically conductive fabric comprising metal-plated glass fibers produced according to Example 1 or Example 2 of the present invention.
11 is a flowchart showing another method for manufacturing a prepreg for a fiber-reinforced composite material produced using an electrically conductive fabric comprising metal-plated glass fibers produced according to Example 1 or Example 2 of the present invention.

Hereinafter, the description of the present invention with reference to the drawings is not limited to a specific embodiment, and various transformations can be applied and various embodiments can be made. It is to be understood that the following description covers all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description, the terms first, second, and the like are used to describe various components and are not limited to their own meaning, and are used only for the purpose of distinguishing one component from another component.

Like reference numerals used throughout the specification denote like elements.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms " comprising, "" comprising, "or" having ", and the like are intended to designate the presence of stated features, integers, And should not be construed to preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 11. FIG.

In order to accomplish the object of the present invention, glass fibers plated with a chemical reduction method such as nickel, copper, tin, zinc, gold, silver, lead, aluminum, cobalt, chrome and alloys thereof are heat treated. Specifically, the heat treatment is carried out at an appropriate time and temperature to form a suitable thickness of the plating layer, to strengthen the bonding strength between the glass fiber and the plating layer through the change of the plating layer shape due to the heat treatment, The bonding strength can be improved, and finally, the electromagnetic wave shielding ability of the polymer composite material can be improved.

The method characteristic of the present invention is that the glass fiber can be metal plated through a chemical reduction method and then strengthened in the bonding strength between the plated metal surface and the glass fiber surface through a heat treatment process.

In addition, the present invention can increase the purity of the metal to be plated, increase the particle diameter of the metal, and increase the roughness of the surface of the metal layer (which may cause an increase in the mechanical interface strength with the resin ) Finally, it is a method capable of producing a functional fiber having improved toughness and electromagnetic shielding ability.

In addition, in the conventional chemical reduction metal plating method, impurities such as phosphorus (P) and boron (B) are added to the metal plating layer by a reducing agent such as dental phosphates and sodium borohydride such as sodium hypophosphoric acid, sodium hypophosphite, The present invention provides a method of manufacturing a metal-glass-fiber-reinforced composite material which has high electrical conductivity, high metal-grain size, And can impart an embossing effect to a metal surface.

The present invention also relates to a method of manufacturing a metal-coated glass fiber having enhanced purity and metal bonding strength, which comprises immersing a glass fiber in an electroless plating solution using a chemical reduction reaction including a metal salt, a reducing agent and a complexing agent.

In addition, the method of manufacturing a metal-plated glass fiber having enhanced purity and metal bonding strength is a method in which a glass is subjected to metal plating by a chemical reduction method, which is effective not only in plating the glass fiber, which is an insulator, Of the metal plating film.

In addition, according to the embodiment of the present invention, a method of manufacturing a metal-plated glass fiber having enhanced purity and metal bonding strength is characterized in that a metal plating solution in which a metal salt, a reducing agent and a complexing agent coexist is subjected to a chemical reduction metal plating treatment, Which is capable of improving the electrical conductivity while forming a metal film having a constant thickness.

The method of manufacturing a metal-coated glass fiber with enhanced metal bonding strength for shielding electromagnetic waves according to an embodiment of the present invention may be performed through a preparation step, a metal layer formation step, and a heat treatment (impurity removal and metal bonding power enhancement) steps.

The preparation step is a step of preparing an electroless plating solution containing a metal salt, a reducing agent and a complexing agent, and a glass fiber.

The metal salt may be at least one selected from the group consisting of a nickel salt, a copper salt, a tin salt, a zinc salt, a gold salt, a silver salt, a lead salt, A salt of cobalt (Co), and a salt of chromium (Cr).

The metal layer forming step is a step of forming a metal layer on the glass fiber surface through a chemical reduction reaction using an electroless plating solution.

The heat treatment step is a step of performing a predetermined heat treatment to remove impurities in the metal layer and to improve the interfacial adhesion between the surface of the glass fiber and the metal layer with respect to the glass fiber having the metal layer formed through the metal layer forming step.

Further, in the heat treatment step of post-plating heat treatment, the heat treatment temperature may be in the range of 300 to 800 degrees Celsius under the active or inactive state. That is, it is not easy to increase the bonding strength between the glass fiber and the metal plating layer at a temperature below 300 ° C., and the glass fiber may be damaged at a temperature above 800 ° C., so that it is preferable to perform the heat treatment between 300 ° C. and 800 ° C. More specifically, in the case of nickel plating, about 600 deg. C is preferable.

In addition, the heat treatment time can be made within 5 to 60 minutes. That is, when the heat treatment time is too short, the removal of impurities such as phosphorus or boron present in the metal plating layer is not sufficient and the bonding force between the metal plating layer and the glass fiber can not be maintained. There is no big problem in more than 60 minutes, but the heat treatment for 60 minutes or more is meaningless because no additional effect occurs.

In addition, impurities (such as phosphorus and boron components) on the heat-treated metal-plated glass fiber are preferably 5 wt% or less.

In addition, in the heat treatment step, impurities of the phosphorus and boron components are removed, and the plating layer is changed to an embossed form, and the plating layer of the embossed structure is made of fiber reinforced plastics manufactured using glass fiber according to the embodiment of the present invention It is possible to improve the interfacial bonding force with the polymer resin.

As a result, the present invention aims at minimizing impurities through a heat treatment process after plating treatment by general chemical reduction, thereby achieving a desired object of the invention (strengthening of adhesion between the metal plating layer and the glass fiber, improvement of electric conductivity, Improvement) can be achieved.

As a result, the electromagnetic wave shielding material can be effectively manufactured through the composite sample of the heat-treated metal-coated glass fiber and the resin (epoxy resin, etc.). However, the resin as the base material is not limited to any specific resin.

Through the above steps, the present invention can effectively manufacture metal-plated glass fibers having enhanced purity and metal bonding strength and composite fibers using the same.

Further, the method may further include a secondary plating step and a secondary heat treatment step of performing metal plating on the metal-plated glass fiber having enhanced purity and metal bonding strength according to an embodiment of the present invention through an electrolytic plating method.

Further, the glass fiber produced by the metal-plated glass fiber having enhanced purity and metal bonding strength according to the embodiment of the present invention can be used as a glass fiber having electrical conductivity of 1 * 10 ³ (S / cm) to 6 * 10 ⁵ It is preferable to have conductivity.

The pH of the electroless metal plating solution of the present invention is preferably in the range of 2 to 11 although it depends on the type of metal to be plated. This is because, when the pH is higher than 11, the liquid is self-decomposed to prevent plating, and when the pH is lower than 2, the quality of the plating layer is lowered.

In the method of the present invention, the thickness of the plating layer is preferably 0.1 to 2.0 mu m. If the thickness is less than 0.1 탆, the metal film (metal layer) is formed too thin, which is disadvantageous for measuring the electrical conductivity. If the thickness is more than 2.0 탆, the metal film becomes too thick, .

Further, in the metal-plated glass fiber having enhanced purity and metal bonding strength according to the embodiment of the present invention, the respective characteristic values can be measured by the following method.

1. Electrical Conductivity of Metal Plated Glass Fiber

)를 계산하였다.(V / I) using a 4-probe volume resistivity tester (MITUBISHI Chemical Co., MCP-T610) to measure the electrical conductivity of the fabricated metal- The cross-sectional area of the fiber side, and L: the distance between the voltage-contacting portions)

) Were calculated.

2. Observation of surface structure, thickness change and other characteristics of metal-plated glass fiber

Scanning electron microscope (SEM JEOL JSM-840A) and X-ray diffraction (XRD) analysis were performed to observe the changed surface microstructure, thickness variation and other characteristics of glass fiber due to the introduction of metal. Rigaku Model D / MAX-Ⅲ was used.

3. Electromagnetic wave shielding ability  evaluation

The electromagnetic wave shielding characteristics were analyzed in the frequency range of 0.3-6.0 GHz by ASTM D4935-89 method using electromagnetic interference (EMI) (AGILENT, USA). The shielding experiment confirmed the reflection and absorption characteristics of the electromagnetic wave, respectively, and conducted the experiment by separating the reflection characteristic into S11 and the absorption characteristic into S12. Each experiment took data based on the point of stabilization through three repeated experiments.

The embodiments of the present invention have been described below for the purpose of illustration and not for limiting the present invention.

An embodiment of the method of manufacturing nickel-plated glass fiber with enhanced purity and metal bonding strength according to the present invention will be described in detail below.

The glass fiber used in this experiment was a preheated HD324-01 (23 * 23 count / inch, weight 248 g / m ² ) produced by Hyundai Fiber Co., Were used.

The glass fiber was pretreated with 0.2 M HNO ₃ for 30 minutes to remove impurities on the surface before the metal plating.

In addition, electroless plating method was used for the nickel plating of glass fiber by continuous process, activated with SnCl ₂ and PdCl ₂ , and washed with distilled water.

In this process, Sn / Pd nuclei are formed on the glass fiber surface, and Sn / Pd nuclei formed on the glass fiber surface promote metal deposition.

Further, the treated glass fibers were placed in a nickel electroless plating solution having a composition of NiCl ₂ .6H ₂ O, NaH ₂ PO ₂ .H ₂ O, NaC ₆ H ₅ O ₇ .2H ₂ O, After the electroless-treated glass fibers were completely dried, they were heat-treated under the conditions shown in Table 2 in an inactive state.

The nickel - plated glass fiber prepared by the above procedure was mixed with a polymer resin and samples were prepared and the electromagnetic wave shielding effect was measured.

Specifically, the following will be described based on Tables 1 to 3 and FIGS. 1 to 6 attached hereto.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photograph showing a cross section of electroless nickel plated glass fiber produced according to the method of manufacturing a metal-plated glass fiber with enhanced purity and metal bonding strength according to an embodiment of the present invention, FIG. 3 is a photograph showing a process of changing the surface shape of the heat-treated nickel plated glass fiber produced according to the method of manufacturing a metal-plated glass fiber with enhanced purity and metal bonding strength according to an embodiment of the present invention. FIG. 4 is a photograph showing the principle of surface shape change of the heat-treated nickel plated glass fiber produced according to the method of manufacturing a metal-plated glass fiber with enhanced purity and metal bonding strength according to an embodiment of the present invention. FIG. 5 is a photograph showing the interfacial bonding state between the glass fiber and the nickel layer after the heat treatment prepared according to the method of manufacturing a metal-plated glass fiber reinforced with a bonding force, FIG. 6 is a schematic view showing the principle of the electromagnetic wave shielding of the nickel-plated glass fiber or polymer composite according to the heat treatment prepared according to the method of manufacturing the metal-plated glass fiber with enhanced purity and metal bonding strength according to the embodiment of the present invention. Fig.

The electroless nickel plating conditions, the thickness of the nickel plating on the glass fiber surface and the electrical conductivity, the change in the surface shape of the heat-treated nickel plated glass fiber, and the principle of change will be described in detail below based on Tables 1 to 3 and FIGS. .

1 shows a state of a glass fiber plated with nickel in an electroless nickel plating solution for one minute.

Further, as shown in FIG. 2, it can be seen that the surface shape of the nickel plated glass fiber after the heat treatment after the heat treatment is changed to the embossed form before the heat treatment. Such an embossed surface shape can have an advantage that the bonding force can be further improved upon bonding with the resin in the future.

The principle that the surface shape of the nickel plated glass fiber is changed through heat treatment is as shown in Fig. 3, in which the nickel component and the impurities (phosphorus and boron components, etc.) constituting the nickel plating layer formed on the glass fiber surface due to the heat treatment process (Such as phosphorus and boron components) are removed from the nickel-plated glass fiber, and the surface shape of the nickel-plated glass fiber is changed into an embossed form due to removal of such impurities (phosphorus and boron components and the like). 3, the left part is the state of the nickel plated glass fiber before the heat treatment, and the right part is the state of the nickel plated glass fiber after the heat treatment.

Next, a process of fusing the interface between the glass fiber and the nickel plating layer through the heat treatment process will be described with reference to FIGS. 4 to 5. FIG.

As shown in Fig. 4, the nickel plated layer and the glass fiber interface in the state of performing the heat treatment are changed into the fused state. That is, the interface between the nickel plated layer and the glass fiber can be more firmly bonded due to the heat treatment process. The fusion state shown in Fig. 4 is made at 600 degrees Celsius.

As shown in FIG. 5, the fusion bonding is performed by heat treatment, and deformation occurs in the interface layer of the nickel plated layer and the glass fiber, and the nickel plated layer and the glass fiber can be more firmly bonded due to such deformation.

The electroconductive fabric comprising the metal-plated glass fibers of the present invention and the method for producing the prepreg for a fiber-reinforced composite material produced using the same will be described with reference to specific examples.

7 is a flowchart showing a method of manufacturing an electroconductive fabric including metal-plated glass fibers according to Example 1 of the present invention.

Referring to FIG. 7, a method of manufacturing an electroconductive fabric including metal-plated glass fibers according to Example 1 of the present invention can be seen.

[Example 1]

The method of manufacturing an electroconductive fabric comprising metal-plated glass fibers according to an embodiment of the present invention includes the steps of: electroless plating solution containing a metal salt, a reducing agent and a complexing agent, and a continuous yarn (S30) for performing a silane coating process on the heat-treated metal-plated glass fiber (S30), a step S30 for forming a metal-plated glass fiber And fabricating a metal-plated glass fiber electroconductive fabric for electromagnetic shielding (S50).

Specifically, the step (S10) of preparing an electroless plating solution containing a metal salt, a reducing agent and a complexing agent and a glass fiber in the form of a continuous fiber (CONTINUOUS FIBER) in which the filaments are bundled into a bundle without bending, And a step of preparing an electroless plating solution and a glass fiber containing a complexing agent.

In the step S10 of preparing an electroless plating solution containing a metal salt, a reducing agent and a complexing agent, and a glass fiber in the form of a CONTINUOUS FIBER in which the filaments are bundled into a bundle without twisting, A glass fiber pre-treatment such as treatment and activation treatment can be performed.

For reference, the activation treatment is a process of adsorbing Sn / Pd catalyst metal on the glass fiber surface by using SnCl ₂ and PdCl ₂ , and the Sn / Pd adsorbed on the glass fiber surface promotes the deposition of the metal to be plated.

The glass fibers can be prepared in the form of continuous fibers in which the filaments are bundled together without kinking. Further, the filament diameter of the glass fiber may be 5 탆 to 50 탆.

Also, the linear density (tex) of the glass fiber may be 200 tex to 10,000 tex. More preferably 1,000 tex to 5,000 tex. For reference, tex is a unit for indicating the thickness of a fiber or yarn, and is an odd number. The length of a kilometer is expressed as weight (g), and the weight of 1 kilometer is called 1 tex. 1 text corresponds to 9D (denier: D / d).

The metal salt may be at least one selected from the group consisting of a nickel salt, a copper salt, a tin salt, a zinc salt, a gold salt, a silver salt, a lead salt, an aluminum salt, Cobalt (Co) salt and chromium (Cr) salt.

The pH of the electroless metal plating solution is preferably in the range of 2 to 11 although it depends on the kind of metal to be plated.

When the pH of the electroless metal plating solution is more than 11, the solution may self-decompose and the plating may not be performed well. Further, when the pH of the electroless metal plating solution is less than 2, the quality of the plating layer may be deteriorated.

The reducing agent is a reactive substance capable of causing a reduction reaction. Sodium hypophosphite may be used as the reducing agent. The reducing agent may also include at least one of hydrazine (N ₂ H ₄ ), sodium borohydride (NaBH ₄ ), formaldehyde, an amine compound, a glycol compound, glycerol, dimethylformamide, tannic acid, citric acid salt and glucose .

The complexing agent can generate complex ions around the metal ions. The complexing agent may be a cyanide salt. In addition, the complexing agent may include at least one of pyrophosphoric acid, glycine, citric acid,? -Carbonyl-based acetylacetone, alkanolamine-based mono-ethanolamine, and dimethylamine.

The metal plating layer forming step (S20) may be a step of forming a metal plating layer on the glass fiber surface through a chemical reduction reaction using an electroless plating solution.

More specifically an embodiment of a metal-plated layer formation step (S20), the case of forming a nickel plating layer on the glass fiber _{surface, NiCl 2 6H 2 O, NaH} 2 PO 2 H 2 0, NaC 6 H 5 O 7 2H 2 0 , The nickel-plated layer can be formed as shown in Table 1, provided that the activated glass fiber passes through the nickel-electroless plating solution having a composition of 60% by weight in 30 seconds to 5 minutes.

[Table 1] Electroless Nickel Plating Conditions and Glass Fiber Surface Nickel Plating Thickness

As shown in Table 1, it can be seen that the nickel plating thickness is increased by increasing the plating time at 60 degrees Celsius.

The thickness of the metal plating layer in the metal plating layer formation step (S20) is preferably 0.1 to 2.0 占 퐉.

When the thickness of the metal plating layer is less than 0.1 탆, the metal film (metal layer) is formed too thin and it may be difficult to measure the electric conductivity. If the thickness of the metal plating layer is more than 2.0 占 퐉, the metal layer becomes too thick to cause a phenomenon in which a yarn-to-fiber yarn combination (two or more yarn-binding yarns are merged) and workability is poor.

The metal-plated glass fiber heat treatment step (S30) is a step of heat-treating the glass fiber on which the metal plating layer is formed through the metal plating layer forming step (S20) so that fusion occurs between the surface of the glass fiber on which the metal plating layer is formed and the metal plating layer, And performing a heat treatment so as to remove impurities present in the metal plating layer.

In the metal-plated glass fiber heat treatment step (S30), impurities in the metal plating layer are removed from the glass fiber having the metal plating layer formed through the metal plating layer formation step to improve the interfacial adhesion between the surface of the glass fiber and the metal plating layer, And performing a predetermined heat treatment to form an embossed structure on the surface of the metal plating layer.

In the metal-plated glass fiber heat treatment step (S30), the heat treatment temperature may be in the range of 300 to 800 degrees Celsius under active or inactive conditions.

If the temperature of the metal plating glass fiber heat treatment is less than 300 degrees, the increase in bonding strength between the glass fiber and the metal plating layer may be low. In addition, when the temperature of the heat treatment of the metal-plated glass fiber exceeds 800 ° C, damage of the glass fiber may occur.

Therefore, it is preferable that the temperature of the heat treatment of the metal-plated glass fiber is between 300 and 800 degrees. More specifically, in the case of nickel plating, it is preferably about 600 deg.

Further, in the metal-plated glass fiber heat treatment step (S30), the heat treatment time may be within 5 to 60 minutes.

Metal Plating If the glass fiber heat treatment time is less than 5 minutes or too short, removal of impurities such as phosphorus (P) or boron (B) present in the metal plating plated layer may not be sufficient. As a result, the bonding force between the metal plating layer and the glass fiber can not be maintained.

In addition, when the heat treatment time of the metal-plated glass fiber exceeds 60 minutes, the heat treatment of more than 60 minutes does not cause any additional effect, resulting in economical and time-wasting.

The metal-plated glass fiber heat treatment step S30 may form an embossed surface while removing impurities such as phosphorus (P) and boron (B) components present in the metal plating layer.

In addition, impurities (such as phosphorus and boron components) on the metal-plated glass fiber subjected to the metal-plating glass fiber heat treatment step (S30) may be 5% by weight or less.

That is, the metal content in the metal plating layer plated on the glass fiber may be 95 wt% or more. As a result, a metal plating layer of high purity can be obtained.

Further, the metal-plated glass fiber subjected to the metal-plating glass fiber heat treatment step (S30) may have an electrical conductivity of 1 x 10 ³ (S / cm) to 6 x 10 ⁵ (S / cm).

Table 2 shows the results of measuring the electrical conductivity of the glass fiber treated with nickel for 2 minutes in the sample of Table 1 while setting the heat treatment time to 30 minutes and changing the heat treatment temperature condition within 300 to 800 degrees Celsius .

As shown in Table 2, it was found that the electric conductivity generally increased with increasing the heat treatment temperature. This can be understood as a result of increasing the purity of the plated nickel by removing impurities (such as phosphorus and boron components) on the nickel plated glass fiber in the heat treatment step.

[Table 2] Heat treatment temperature condition and electric conductivity of nickel plated glass fiber plated for 2 minutes

As shown in Table 2, the electrical conductivity of the plated glass fibers was measured while changing the temperature condition within the range of 300 ° C. to 800 ° C. for 2 minutes in Table 1, and the heat treatment time was 30 minutes. As a result, it was found that the electric conductivity increased as the heat treatment temperature increased.

Further, as shown in FIG. 2, it can be seen that the surface shape of the nickel-plated glass fiber subjected to the heat treatment as compared with that before the heat treatment changed into the embossed form.

Through the embossed surface shape of the heat-treated nickel-plated glass fiber, it is possible to provide the effect that the bonding force is improved more than before the heat treatment when bonded to the resin in the future.

For reference, the mechanism of chemical fusion at the nickel-glass fiber interface after nickel plating is as follows.

After the heat treatment of the nickel plated glass fiber, the Si-O structure on the surface and the Ni chemically bond to form a Si-O-Ni bond.

In addition, the phosphorus (P) molecules contained in the metal layer may absorb thermal energy due to the heat treatment, so that the phosphorus (P) molecules may be vaporized. Accordingly, the content of phosphorus (P) molecules contained in the metal layer can be reduced.

In the present invention, P is removed from the physical bonding form of Ni-P: SiO ₂ to form a chemical bond of Ni-O-Si, and a strong metal bonding force can be imparted.

The present invention is characterized by controlling the shape and size of the embossing morphology and the electric conductivity / electromagnetic wave shielding property on the surface of the metal plating layer by controlling the content of boron (B) or phosphorus (P) in the metal plating layer in the heat treatment step .

The electromagnetic shielding ability of a composite material produced by using plated and heat-treated metal-plated glass fibers and a polymer resin according to an embodiment of the present invention will be described in detail with reference to Tables 3 and 6 below.

An epoxy resin is used as the polymer resin, but various types of polymer resins can be used without being limited to the epoxy resin.

Table 3 shows the electromagnetic shielding performance of the composite material produced by using the nickel-plated glass fiber and the epoxy resin heat-treated at each heat treatment temperature according to the heat treatment temperature of the nickel plated glass fiber, and Fig. 6 shows the heat- (DB) according to the frequency (abscissa) of the electromagnetic shielding ability pattern of a composite material produced by using a plated glass fiber and an epoxy resin.

As shown in Table 3, the composites produced by using the nickel-plated glass fiber and epoxy resin subjected to the heat treatment process have the electromagnetic shielding ability of 60 dB or more and the shielding strength of the electromagnetic wave is generally increased as the heat treatment temperature is increased Could know.

The left side of FIG. 6 shows the electromagnetic wave shielding intensity in the entire frequency band, and the right side shows the electromagnetic wave shielding intensity in the low frequency band in detail.

[Table 3] EMI shielding ability of heat-treated nickel-plated glass fiber and epoxy resin composite material

As a result, when the electroless plating solution and the glass fiber preparation step, the metal plating layer forming step and the heat treatment step are performed, a metal plating glass having enhanced purity and metal bonding strength suitable for the fabrication of the electroconductive fabric and the fiber- Fibers can be produced.

The step of fabricating a metal-plated glass fiber electroconductive fabric for electromagnetic wave shielding (S50) may produce a metal-plated glass fiber electroconductive fabric for electromagnetic shielding.

The step (S50) of producing a metal-plated glass fiber electroconductive fabric for electromagnetic shielding is a step of weaving an electrically conductive fabric using a metal-plated glass fiber subjected to a heat treatment step.

The electrically conductive fabric may be woven into a variety of tissue forms, such as plain weave, twill weave, and twill weave to suit the intended use and desired properties of the final product.

Further, the method may further include a secondary plating step of performing metal plating on the metal-plated glass fibers subjected to the metal-plating glass fiber heat treatment step (S30) through an electrolytic plating method.

The second plating step is a metal plating. The metal plating on which the glass fiber heat treatment step (S30) is performed is coated on the surface of the glass fiber by an electroplating method to form nickel (Ni), copper (Cu), tin (Sn), zinc (Zn) (Au), aluminum (Al), cobalt (Co), and chromium (Cr) is further plated.

The surface of the heat-treated metal-plated glass fiber is hydrophilic and has a low interfacial affinity with the hydrophobic surface of the polymer resin used in producing the fiber-reinforced plastic part. Therefore, a sizing treatment step (S40) for performing a silane coating treatment on the surface of the heat-treated metal-plated glass fiber for enhancing the hydrophilic-hydrophobic interface bonding strength can be performed.

The sizing treatment step S40 may be performed after the heat treatment is performed with a dilute solution using at least one silane selected from the group consisting of Amino-silane, Epoxy-silane, Methacrylate-silane, Vinyl-silane, Alkyl- It is the process of coating the surface of the metal plating plies.

The sizing treatment step (S40) is a surface treatment process of the metal-plated glass fiber for enhancing the bonding force between the hydrophilic interface of the metal-plated glass fiber and the hydrophobic interface of the polymer resin in the production of the fiber-reinforced composite material.

Aminopropyl trimethoxysilane (APS) can be used as a representative silane of the amino-silane system.

Representative silanes of epoxy-silane system can use glycidoxy propyl trimethoxy silane (GPS).

Typical examples of methacrylate-silane silanes are 3- (trimethoxysilyl) propylmethacrylate (MPS).

8 is a flowchart showing a method of manufacturing an electroconductive fabric including metal-plated glass fibers according to Embodiment 2 of the present invention.

Referring to FIG. 8, a method of manufacturing an electroconductive fabric including metal-plated glass fibers according to Example 2 of the present invention can be known.

[Example 2]

A method for manufacturing an electroconductive fabric comprising metal-plated glass fibers according to another embodiment of the present invention includes the steps of preparing an electroless plating solution and a glass fiber fabric including a metal salt, a reducing agent and a complexing agent, A metal plating layer forming step of forming a metal plating layer on the surface of the glass fiber of the glass fiber fabric through a chemical reduction process using the metal plating layer, a heat treatment step of performing heat treatment on the glass fiber fabric having the metal plating layer formed on the glass fiber surface through the metal plating layer forming step And a sizing treatment step of performing a silane coating treatment on the heat-treated metal-plated glass fiber.

Specifically, the method for manufacturing an electroconductive fabric comprising metal-plated glass fibers according to Embodiment 2 of the present invention includes the steps of preparing an electroless plating solution and a glass fiber fabric S11, forming a metal plating layer S21, A plated glass fiber heat treatment step S31 and a sizing treatment step S41 for performing a silane coating treatment on the heat treated metal plated glass fiber.

The step (S11) of preparing the electroless plating solution and the glass fiber fabric may be a step of preparing an electroless plating solution and a glass fiber fabric including a metal salt, a reducing agent and a complexing agent.

In the metal plating layer forming step (S21), a metal plating layer may be formed on the surface of the glass fiber through a chemical reduction reaction using an electroless plating solution. In addition, the metal plating layer forming step S21 may be performed in the same manner as the metal plating layer forming step S20 described above.

The metal-plated glass fiber heat treatment step (S31) improves the interfacial bonding force by making fusion between the surface of the glass fiber on which the metal plating layer is formed and the metal plating layer, with respect to the glass fiber having the metal plating layer formed through the metal plating layer- A heat treatment may be performed to remove impurities existing in the metal plating layer. In addition, the metal-plated glass fiber heat treatment step S31 may be performed through the same process as the metal-plated glass fiber heat treatment step S30 described above.

The sizing treatment step (S41) for performing the silane coating treatment on the heat-treated metal-plated glass fiber can be carried out by a sizing treatment step of performing the silane coating treatment on the heat-treated metal-plated glass fiber.

The difference between the method of manufacturing the electroconductive fabric including the metal-plated glass fiber according to the second embodiment of the present invention and the first embodiment differs from that of the first embodiment in that, instead of the continuous glass fiberglass in the preparation step, various tissues such as plain weave, It is possible to produce an electroconductive fabric having a high interfacial adhesion between the glass fiber and the metal plating layer and a high purity of the metal plating layer without performing the weaving step after the heat treatment step.

9 is a flowchart illustrating a method of manufacturing a thermosetting prepreg for a fiber-reinforced composite material manufactured using an electrically conductive fabric including metal-plated glass fibers produced according to Example 1 or Example 2 of the present invention.

Referring to FIG. 9, a method of manufacturing a thermosetting prepreg for a fiber-reinforced composite material using an electrically conductive fabric comprising metal-plated glass fibers produced according to Example 1 or 2 of the present invention can be seen.

[Example 3]

Preparation of thermosetting prepregs for glass fiber reinforced composite materials using an electroconductive fabric comprising metal-plated glass fibers prepared according to Example 1 or Example 2 of the present invention, a metal-plated glass fiber electroconductive fabric and a thermosetting resin solution (S100), a resin solution impregnating step (S110) of impregnating a metal-plated glass fiber electroconductive fabric with a thermosetting resin solution, a thermosetting resin solution impregnated in a metal-plated glass fiber electroconductive fabric to a certain degree of resin curing (B- (S120) and a packaging step (S130).

The preparation step (S100) may be a step of preparing a thermosetting resin solution in which a metal-plated glass fiber electroconductive fabric, a thermosetting resin, a curing agent and a solvent are mixed.

The resin solution impregnation step (S110) may be a resin solution impregnation step in which the metal-plated glass fiber electroconductive fabric is impregnated with a resin solution in a metal-plated glass fiber electroconductive fabric while passing through a bath containing a thermosetting resin solution.

In the resin coating step S120, the metal-plated glass fiber electroconductive fabric impregnated with the resin through the resin impregnation step (S110) passes through the coating tower and evaporates excess solvent and forms a resin hardening (B- stage may occur.

The packaging step S130 may be a packaging step of laminating a releasing paper or release film on both sides (upper surface and lower surface) of the thermosetting resin-coated metal-plated glass fiber electroconductive fabric subjected to the resin coating step S120.

The thermally conductive prepreg for a fiber reinforced composite material comprises 30% to 75% by weight of the electrically conductive fabric comprising metal plated glass fibers.

In general, the curing of the thermosetting resin used in the prepreg proceeds to the following three stages of A-stage, B-stage and C-stage.

1) A-Stage: A state where the resin and the curing material are merely mixed according to the blending ratio and the curing reaction does not occur at all.

2) B-Stage: It is a step where the resin and the curing material react to some extent and the viscosity increases so that the melt is not dissolved by the solvent but is melted by heat to form Flow.

3) C-Stage: The stage where the reaction between the resin and the curing agent is almost completed or completed, and the curing of the material is not affected by the solvent or heat.

The prepreg is cured in the B-stage during the resin curing step and stored at low temperature to retard further reaction.

10 is a flowchart showing a method for manufacturing a thermoplastic prepreg for a fiber-reinforced composite material manufactured using an electrically conductive fabric comprising metal-plated glass fibers produced according to Example 1 or Example 2 of the present invention.

Referring to FIG. 10, there is shown a method for producing a thermoplastic prepreg for a fiber-reinforced composite material using an electrically conductive fabric comprising metal-plated glass fibers produced according to Example 1 or Example 2 of the present invention.

[Example 4]

Preparing a thermoplastic prepreg for a fiber-reinforced composite material using an electrically conductive fabric comprising metal-plated glass fibers prepared according to Example 1 or Example 2 of the present invention (S200), preparing a thermoplastic prepreg for a glass- A step (S210) of preparing a thermoplastic resin film processed into a film form of a resin, a step (S220) of laminating a thermoplastic resin film to the metal-plated glass fiber electroconductive fabric, a step of forming a metal-plated glass fiber electroconductive fabric laminated with a thermoplastic resin film Heating and pressing (S230), and cooling (S240).

Step S200 of preparing a metal plated glass fiber electroconductive fabric may be a step of preparing a metal plated glass fiber electroconductive fabric.

The step (S210) of preparing a thermoplastic resin film processed into a film form of a thermoplastic resin may be a step of preparing a thermoplastic resin film obtained by processing a thermoplastic resin into a film form.

Step S220 of laminating the thermoplastic resin film to the metal plated glass fiber electroconductive fabric may be a step of laminating the thermoplastic resin film to the metal plated glass fiber electroconductive fabric. In addition, the step S220 of laminating the thermoplastic resin film to the metal-plated glass fiber electroconductive fabric may include laminating a thermoplastic resin film on both sides (upper surface and lower surface) or on either side of the electrically conductive fabric.

Step S230 of heating and pressing the metal plated glass fiber electroconductive fabric laminated with the thermoplastic resin film may be a step of heating and pressing the metal plated glass fiber electroconductive fabric laminated with the thermoplastic resin film. The step S230 of heating and pressing the metal-plated glass fiber electroconductive fabric laminated with the thermoplastic resin film is performed by heating and heating the thermoplastic resin film to a temperature not lower than melting point of the thermoplastic resin film, And a resin coating step for coating.

The cooling step S240 may be a step in which the liquid thermoplastic resin impregnated and coated with the electrically conductive fabric is cooled to a solid state.

The thermoplastic prepreg for a fiber-reinforced composite material comprises 30% to 75% by weight of the electrically conductive fabric comprising metal-plated glass fibers.

11 is a flowchart showing another method of manufacturing a prepreg for a fiber-reinforced composite material manufactured using an electrically conductive fabric comprising metal-plated glass fibers produced according to Example 1 or Example 2 of the present invention.

Referring to FIG. 11, another process for producing a prepreg for a fiber-reinforced composite material using an electroconductive fabric comprising metal-plated glass fibers produced according to Example 1 or 2 of the present invention can be known .

[Example 5]

Another method of preparing a thermosetting prepreg for a fiber-reinforced composite material using an electrically conductive fabric comprising metal-plated glass fibers prepared according to Example 1 or 2 of the present invention comprises the steps of preparing a metal-plated glass fiber electroconductive fabric (S330), a step (S310) of preparing an epoxy resin composition (S310), a step (S320) of forming a resin film by coating the epoxy resin composition on a release paper, a step (S330) of laminating a resin film on the metal- A step S340 of heating and pressing the metal-plated glass fiber electroconductive fabric laminated with the resin film, and a packaging step S350.

Step S300 of preparing a metal plated glass fiber electroconductive fabric may be a step of preparing a metal plated glass fiber electroconductive fabric.

The step (S310) of preparing the epoxy resin composition may be a step of preparing the epoxy resin composition. The step (S310) of preparing the epoxy resin composition may be an epoxy resin composition preparation step of preparing an epoxy resin composition through kneading while adding a curing agent, a curing accelerator and other additives to the epoxy resin.

The step (S320) of applying the epoxy resin composition on a release paper to produce a resin film may be a step of applying the epoxy resin composition on a release paper to produce a resin film. Also, the step (S320) of applying the epoxy resin composition onto the release paper to produce the resin film (S320) may be a resin film production step in which the epoxy resin composition is coated on a release paper using a coater to produce a resin film.

Step S330 of laminating the resin film to the metal plated glass fiber electroconductive fabric may be a step of laminating the resin film to the metal plated glass fiber electroconductive fabric. In addition, the step (S330) of laminating the resin film to the metal-plated glass fiber electroconductive fabric may include laminating a resin film on both surfaces (upper surface and lower surface) or one side of the electrically conductive fabric.

Step S340 of heating and pressing the metal-plated glass fiber electroconductive fabric laminated with the resin film may be a step of heating and pressing the metal-plated glass fiber electroconductive fabric laminated with the resin film. Further, the step (S340) of heating and pressing the metal-plated glass fiber electroconductive fabric laminated with the resin film may be a resin coating step of impregnating and coating the epoxy resin composition with the electrically conductive fabric by a heating and pressing device. The hot melt process (Hot Melt Process) may be used for heating and pressing the metal-plated glass fiber electroconductive fabric laminated with the resin film (S340).

The packaging step S350 is a step of pressing and heating the metal-plated glass fiber electroconductive fabric laminated with the resin film on both sides (upper surface and lower surface) of the fabric impregnated and coated with the epoxy resin composition through heating and pressing (S340) And a packaging step of laminating and packaging the release films.

The thermally conductive prepreg for a fiber reinforced composite material comprises 30% to 75% by weight of the electrically conductive fabric comprising metal plated glass fibers.

Claims (11)

(a) preparing an electroless plating solution containing a metal salt, a reducing agent and a complexing agent, and a glass fiber in the form of a continuous yarn (CONTINUOUS FIBER) in which the filaments are bundled into one bundle without twisting;
(b) forming a metal plating layer on the surface of the glass fiber through a chemical reduction reaction using the electroless plating solution;
(c) fusion bonding is performed between the surface of the glass fiber on which the metal plating layer is formed and the metal plating layer with respect to the glass fiber on which the metal plating layer is formed through the metal plating layer formation step to improve the interfacial adhesion force, A metal-plated glass fiber heat treatment step of performing heat treatment so as to remove impurities present;
(d) a sizing treatment step of performing a silane coating treatment on the surface of the heat-treated metal-plated glass fiber; And
(e) fabricating a metal-plated glass fiber electroconductive fabric for electromagnetic wave shielding using metal-plated glass fibers having enhanced purity and metal bonding strength through the steps (a) to (d) A method of making an electrically conductive fabric comprising a fiber.
(a) preparing an electroless plating solution comprising a metal salt, a reducing agent and a complexing agent, and a glass fiber fabric;
(b) forming a metal plating layer on the surface of the glass fiber through a chemical reduction reaction using the electroless plating solution;
(c) fusion bonding is performed between the surface of the glass fiber on which the metal plating layer is formed and the metal plating layer with respect to the glass fiber on which the metal plating layer is formed through the metal plating layer formation step to improve the interfacial adhesion force, A metal-plated glass fiber heat treatment step of performing heat treatment so as to remove impurities present; And
(d) a sizing treatment step of performing a silane coating treatment on the surface of the heat-treated metal-plated glass fiber.
3. The method of claim 2,
The metal salt may be at least one selected from the group consisting of a nickel salt, a copper salt, a tin salt, a zinc salt, a gold salt, a silver salt, a lead salt, , A cobalt (Co) salt, and a chromium (Cr) salt.
3. The method of claim 2,
The electroless plating solution may contain,
lt; RTI ID = 0.0 > 1, < / RTI > wherein the pH is between 2 and 11.
3. The method of claim 2,
The step (c)
Wherein the heat treatment is performed at a temperature of 300 to 800 degrees Celsius for 5 minutes to 60 minutes.
3. The method of claim 2,
After step (c)
Wherein the metal content of the plated metal plating layer on the surface of the glass fiber is 95 wt% or more.
3. The method of claim 2,
After step (c)
Wherein the metal plated glass fibers have an electrical conductivity of 1 x 10 ³ (S / cm) to 6 x 10 ⁵ (S / cm).
The method according to claim 1,
Wherein the sizing processing step comprises:
The surface of the heat-treated metal-plated glass fiber is coated with a dilute solution using at least one silane selected from the group consisting of Amino-silane, Epoxy-silane, Methacrylate-silane, Vinyl-silane, Alkyl-silane and Phenyl- ≪ RTI ID = 0.0 > 1, < / RTI >
An electrically conductive fabric comprising metal plated glass fibers produced by the process of any one of claims 1 to 8.
A prepreg produced by impregnating a thermosetting resin into an electrically conductive fabric comprising metal-plated glass fibers according to claim 9.
A prepreg produced by impregnating a thermoplastic resin into an electrically conductive fabric comprising metal plated glass fibers according to claim 9.

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