JP4972341B2 - 3D fiber reinforced resin composite - Google Patents

Description

  The present invention relates to a three-dimensional fiber reinforced resin composite (a fiber reinforced resin composite formed by impregnating and curing a resin in three-dimensional reinforcing fibers).

  Today, fiber reinforced plastic composites (FRP: Fiber Reinforced Plastics) are widely used as structural members for aircraft, automobiles, ships or general industrial equipment. Resin to reinforcing fibers (referred to as “in-plane direction yarns”) that are aligned in one direction within a certain reference plane or arranged in two or more directions within a certain reference plane to form a fabric (including woven fabric and non-woven fabric). A fiber reinforced resin composite material formed by impregnating and curing is known. For example, a fabric formed by impregnating and curing a resin such as an epoxy resin on a woven fabric in which inorganic reinforcing fibers such as carbon fibers and glass fibers are arranged in a horizontal and vertical direction is known. In the flat fiber-reinforced resin composite material, the direction of the reference plane is constant regardless of the position. The direction of the reference surface may vary depending on the position. For example, a plate material formed by impregnating and curing a resin on a plate material formed in an arbitrary curved surface or a reinforcing fiber wound in a cylindrical shape is known.

  The three-dimensional fiber-reinforced resin composite material is obtained by adding reinforcing fibers (referred to as “out-of-plane direction yarns”) arranged in the direction intersecting the reference surface as the third-dimensional direction yarns to the in-plane direction yarns (“3”). It is a fiber-reinforced resin composite material formed by impregnating and curing a resin to a dimension-reinforced fiber fabric. Patent Document 1 describes an example of a three-dimensional fiber reinforced resin composite material.

  As shown in FIG. 6, one three-dimensional fiber reinforced resin composite material described in Patent Document 1 includes an in-plane direction yarn 3 composed of a plurality of warp yarns 1 and a plurality of weft yarns 2 and a reference plane of the in-plane direction yarn 3 A flat three-dimensional woven fabric 6 formed of a plurality of out-of-plane yarns 4 orthogonal to each other and ear yarns 5 for fixing the out-of-plane yarns 4 is impregnated with a resin using a sealing jig (not shown). The resin impregnated into the flat three-dimensional woven fabric 6 is heated and pressurized to be cured.

The out-of-plane direction thread 4 is sewn into the fabric formed by the in-plane direction thread 3, and such out-of-plane direction thread is called a sewing thread. The in-plane direction threads 3 are laminated, and a plurality of layers of the in-plane direction threads 3 are stitched together by the sewing threads 4.
The sewing thread 4 is passed through and locked to the ear part formed by the folding, and reciprocates between the front and back of the cloth at the same position (without straddling the in-plane direction thread 3).

The three-dimensional reinforcing fiber woven fabric used for the fiber reinforced resin composite material is described in Non-Patent Document 1 as an example in addition to the woven style introduced in Non-Patent Document 1, and the stitching form introduced in Patent Document 2. There are stitching forms.
The three-dimensional reinforced fiber fabric used for the fiber reinforced resin composite material described in FIG. 12 of Patent Document 2 is an in-plane direction yarn (warp, warp and bias yarn), similar to the one described in Patent Document 1 described above. It is composed of an out-of-plane direction thread (sewing thread y) and further has an ear thread (locking thread = P) for locking the sewing thread.

Conventionally, in the three-dimensional reinforcing fiber fabric used for the fiber reinforced resin composite material, the same material is generally used for the ear thread and the sewing thread.
Generally, in a three-dimensional reinforcing fiber fabric used for a fiber reinforced resin composite material applied to aircraft parts, carbon fiber or glass fiber is used for both in-plane direction yarns and out-of-plane direction yarns. The same material as the sewing thread is also used.
Conventionally, the ear thread is used only for the purpose of locking the sewing thread, and the ear thread itself is not required to have other characteristics including strength characteristics as a fiber for reinforcing the resin composite material.

Conventionally, as a molding method of a fiber reinforced resin composite material, one is molding using a material (prepreg) obtained by impregnating an uncured resin into a reinforcing fiber formed in a cloth shape and curing it in a B stage (intermediate curing) The method is taken. In this method, the prepregs are laminated, and are heated and cured in an autoclave (pressure heating furnace).
Also, an RTM (Resin Transfer Molding) method is used in which a resin is injected into a mold containing reinforcing fibers and the resin impregnated in the reinforcing fibers in the mold is cured and molded.
Also, RFI (Resin Film Infusion), in which a thermosetting resin film and reinforcing fibers are sequentially laminated on a predetermined lower jig, and the thermosetting resin film is melted by pressurization and heating to impregnate and harden the reinforcing fibers. Law is adopted.
In recent years, parts production by the RTM method and the RFI method has attracted attention as a low-cost method.
JP 2003-123456 A Japanese Patent Laid-Open No. 5-106139 Journal of Japan Society for Composite Materials Vol.21 No.2 Reprint [Three-dimensional woven composite materials-I.-Development trends of three-dimensional woven composite materials] “COMPOSITE AIRFRAME STRUCTURES” 1992 Michael C. Y.Niu (Author) p95 Japan Aerospace Industry Association Publication No.621, September 2005, p27

Even in the above prior art, there are the following problems.
First, it is necessary to attach a lightning resistant material (conductive material) to the outer surface of the fiber reinforced resin composite material applied to the outer panel of the aircraft as a countermeasure against lightning.

  Secondly, as described in Non-Patent Document 3, an electronic device necessary for flight is mounted on the aircraft body, and it is necessary to shield (shield) the obstacle radio waves from the outside of the aircraft body. In particular, radar communication with the ground controller at the time of taking off and landing should be taken into consideration especially for radio interference (noise) entering from outside the aircraft. As a radio wave shielding material that eliminates radio interference from the outside of the machine body, it is necessary to attach a conductive material to a necessary portion of the surface of the fiber reinforced resin composite material.

  Third, in order to attach a conductive material to the surface of a fiber reinforced resin composite material for the above purpose or other purposes, it is necessary to bond the conductive material at the same time as the production of the fiber reinforced resin composite material or in a later process. There is. Therefore, there is a problem that it takes time and cost to arrange materials such as conductive materials and adhesives, bonding process, and inspection process.

  On the other hand, in the three-dimensional reinforced fiber fabric used for the fiber reinforced resin composite material, the ear thread does not require any other function in addition to the locking function for stopping the sewing thread. Therefore, this ear thread exists as a material which does not contribute to the composite material property after the composite material is formed and cured.

  This invention is made | formed in view of the problem in the above prior art, Comprising: It makes it a subject to provide electroconductivity to a fiber reinforced resin composite material, without impairing productivity.

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a resin is impregnated and cured in a reinforcing fiber woven fabric formed by sewing a sewing thread while being locked to an ear thread on a cloth formed by an in-plane direction thread. In the three-dimensional fiber reinforced resin composite material
A three-dimensional fiber reinforced resin composite material, wherein the ear thread is made of a conductive material having higher conductivity than the in-plane direction thread , and the sewing thread is made of glass fiber, carbon fiber, or organic fiber. is there.

The invention according to claim 2 is the three-dimensional fiber reinforced resin composite material according to claim 1 , wherein the ear thread is made of a metal material.

According to a third aspect of the present invention, there is provided a three-dimensional fiber reinforced resin composite obtained by impregnating and curing a reinforced fiber fabric in which a sewing thread is sewn to a cloth formed by in-plane direction threads while being engaged with ear threads. In the material,
The in-plane direction yarn is made of glass fiber or carbon fiber, the ear yarn is made of a metal material ,
The sewing thread is a three-dimensional fiber reinforced resin composite material made of glass fiber, carbon fiber, or organic fiber .

  The invention according to claim 4 is characterized in that the ear thread is composed of copper, aluminum, nickel, iron or titanium as a main component. The three-dimensional fiber reinforced resin composite material.

  According to a fifth aspect of the present invention, any one of the first to third aspects is characterized in that the in-plane direction yarn is composed of carbon fiber, and the ear yarn is composed of nickel as a main component. It is a three-dimensional fiber reinforced resin composite material as described in any one.

The invention according to claim 6 is the three-dimensional fiber reinforced resin composite material according to claim 1 , wherein the ear thread is covered with a metal film.

  Invention of Claim 7 contains the connection electrically-conductive material which short-circuits the said ear threads arrange | positioned at intervals, The three-dimensional fiber reinforcement as described in any one of Claims 1-6 characterized by the above-mentioned. It is a resin composite material.

  The invention according to claim 8 is characterized in that the ear threads are arranged in parallel at a distance, one connection conductive material that short-circuits one end portions of the ear threads, and the connection of the ear threads without being connected to the connection conductive material. It is the other connection conductive material which short-circuits the other end parts, It is a three-dimensional fiber reinforced resin composite material as described in any one of Claims 1-6 (refer 2nd Embodiment). ).

  The invention according to claim 9 is characterized in that the ear threads are arranged parallel to each other at a distance, one connection conductive material that short-circuits the ear threads, and a connection conductor that is not connected to the connection conductive material, and is arranged obliquely. The three-dimensional fiber reinforced resin composite material according to any one of claims 1 to 6, further comprising another connection conductive material that short-circuits the ear threads (see the third embodiment). .

  The invention according to claim 10 includes two connection conductive materials in which the ear threads are arranged in parallel at a distance from each other, intersect the ear threads so that they can be short-circuited with each other, and intersect with each other so as to be conductive to each other. The three-dimensional fiber-reinforced resin composite material according to any one of claims 1 to 6 (see the fourth embodiment).

  The invention according to claim 11 is characterized in that an electrode terminal for external connection conducted to the connection conductive material is formed, and the three-dimensional fiber reinforced according to any one of claims 7 to 10. It is a resin composite material.

The invention according to claim 12 is characterized in that the ear threads are arranged in parallel at intervals,
Two connecting conductive materials that intersect the ear threads so that they can be short-circuited with each other, and that are spaced apart from each other in the out-of-plane direction;
Other connection conductive materials that connect one end portions of the two connection conductive materials;
The three-dimensional fiber reinforced resin composite according to any one of claims 1 to 6, further comprising an electrode terminal for external connection conducted to each other end of the two connection conductive materials. It is a material (refer 5th Embodiment).

  The invention according to claim 13 is the three-dimensional fiber-reinforced resin composite material according to any one of claims 7 to 12, wherein the connection conductive material is woven into the reinforcing fiber fabric. It is.

According to the present invention, since the ear thread is made of a conductive material, there is an effect that conductivity can be imparted to the fiber-reinforced resin composite material without impairing productivity.
By adding a new function of conductivity to the fiber reinforced resin composite material, the electrical conductivity and electrical resistivity can be adjusted by selecting the material, wire diameter, and number of ear threads.
By selecting the material, wire diameter, and number of ear threads, weaving the connection conductive material that short-circuits the ear threads, and performing necessary processing such as electrode terminals, for example, electromagnetic shielding function, lightning resistance function, electrostatic It has a prevention function, damage detection function by detecting presence / absence of ear thread continuity and resistance change, heater function using ear thread as heating wire, antenna function etc. by devising arrangement of conductive path by ear thread etc. 3 A two-dimensional fiber reinforced resin composite material can be obtained, and can be applied to various applications.

  According to the present invention, since the ear thread is made of a conductive material, conductivity can be imparted to the fiber reinforced resin composite in the same process as the conventional fiber reinforced resin composite. Compared with the conventional technique in which a conductive material is attached to a resin composite material by bonding or the like, it is possible to improve productivity, durability, lightness, and cost.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

[First Embodiment]
First, a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a plan view showing a three-dimensional fiber reinforced resin composite material according to a first embodiment of the present invention.

  In the three-dimensional reinforcing fiber fabric used for the three-dimensional fiber reinforced resin composite material 10 of the present embodiment, the in-plane direction yarns are aligned in one direction within a certain reference plane, or two or more directions within a certain reference plane. To form a fabric (including woven fabric and non-woven fabric). A three-dimensional reinforcing fiber fabric is woven by sewing the sewing thread 4 onto the cloth while being engaged with the ear thread 5. An example of a cross-sectional structure of a three-dimensional reinforcing fiber fabric is shown in FIG. 6, for example.

As a molding method of a three-dimensional fiber reinforced resin composite material, a resin is injected into a mold containing a three-dimensional reinforcing fiber fabric, and the resin impregnated in the three-dimensional reinforcing fiber fabric is cured and molded. The transfer molding method is preferred. According to the RTM method, the quality and production efficiency of the product is improved, and the characteristics of the three-dimensional reinforcing fiber woven fabric having the sewing thread that the thread of the reinforcing fiber woven fabric is not easily frayed by the sewing thread are utilized to improve the quality and production. Efficiency is improved.
In addition, you may manufacture by RFI (Resin Film Infusion) method.
In addition, if a three-dimensional reinforcing fiber fabric is manufactured according to the shape of the molded product in advance and is then impregnated with resin and cured, the amount of shaping after resin curing can be reduced, resulting in wasted material. Can reduce the working time.

  As the material for the in-plane direction yarn, glass fiber or carbon fiber may be used. As a material of the sewing thread 4, in addition to glass fiber and carbon fiber, organic fiber such as polyarylate fiber or polyparaphenylene benzobisoxazole fiber may be used. According to the organic fiber, the flexibility is good and the occurrence of cracks around the sewing thread is suppressed. Also, polyarylate fibers or polyparaphenylene benzobisoxazole fibers are suitable for resin composites because they have sufficiently high tensile strength and thermal decomposition temperature, sufficiently low elastic modulus and do not decompose into water. Polyparaphenylene benzobisoxazole fiber has higher tensile strength and thermal decomposition temperature than polyarylate fiber, especially tensile strength is higher than carbon fiber, but the strength may be halved by irradiation with sunlight. It is good to use properly.

  As the material of the ear thread, a metal material containing copper, aluminum, nickel, iron, titanium or the like as its main component is used. This metal material may be used as a metal film covering glass fiber or carbon fiber. It is because conductivity can be imparted to the ear thread similarly. Table 1 shows the electrical resistivity of these metal materials. Table 2 shows the electrical resistivity of the carbon fiber.

  When glass fiber or organic fiber is applied to the in-plane direction thread or sewing thread, these fibers have no electrical contact failure with metal, so there is no limitation on the metal material applied to the ear thread, such as aluminum, iron, copper, Any material such as nickel and alloys thereof can be applied, and can be arbitrarily selected according to functional requirements.

  When the carbon fiber is applied to the in-plane direction thread or the sewing thread, there is an electric contact defect that occurs due to the potential difference between the carbon and the metal. However, since nickel and nickel alloy have no possibility of causing an electric contact failure with respect to carbon, when carbon fiber is applied to an in-plane direction thread or sewing thread, nickel or a nickel alloy is applied to the ear thread.

In addition, since the ear thread originally does not have a function of mechanically reinforcing the fiber reinforced resin composite material, even if the ear thread is changed from carbon fiber or glass fiber to metal fiber, the mechanical strength is not lowered.
In general, the weight ratio of the ear thread in the three-dimensional reinforcing fiber fabric is 1% or less, and when the resin is included, this weight ratio is further lower. Therefore, the ear thread is made of carbon fiber or glass fiber. Therefore, the weight increase is negligible even if the metal fiber is used instead.

  As shown in FIG. 1, the ear threads 5 are arranged in parallel at intervals. The composite material 10 of the present embodiment can be used as a conductive material such as an electromagnetic shield material or a lightning resistant material.

As for the electromagnetic shielding property, the property that the shielding effect (shielding property) increases in proportion to the conductivity is known. Therefore, in Table 1, it is preferable to use nickel rather than iron, aluminum rather than nickel, and copper rather than aluminum.
When connection to the outside is required, such as for lightning resistant materials, it is preferable to use the following embodiment.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a plan view showing a three-dimensional fiber-reinforced resin composite material according to a second embodiment of the present invention.

  The three-dimensional fiber reinforced resin composite material 11 of the present embodiment is different from the composite material 10 of the first embodiment in that a connection conductive wire 7 and a metal fastener 8 are added, and the others are the same.

The connecting conductive wire 7 is woven and added at the same time as sewing with the sewing thread 4 and the ear thread 5 or before molding. Thereafter, it can be molded by the RTM method.
When a molding method using a prepreg is adopted, the uppermost layer of the prepreg is laminated with the metal ear yarn side facing up, and the connection conductive wire 7 is disposed on the upper side, and the autoclave ( You may shape | mold by pressurizing and hardening in a pressure heating furnace.
Further, when the RFI method is adopted, the uppermost reinforcing fiber is laminated with the metal ear yarn side facing up, the connection conductive wire 7 is disposed thereon, and a thermosetting resin film is further disposed thereon. Alternatively, the thermosetting resin film may be melted by pressurization and heating to be impregnated and cured in the reinforcing fibers.

  The metal fastener 8 is formed by processing a molded and hardened fiber reinforced resin composite material. The metal fastener 8 is for fixing to a body frame such as an aircraft. The metal fastener 8 includes a hole and a metal part that is provided on the inner surface of the hole and is connected to the connection conductive wire 7. The metal part of the metal fastener 8 is electrically connected to the machine frame via fixing brackets such as rivets and bolts, and / or directly connected to the machine frame directly.

The connection conductive wire 7 short-circuits the ear threads 5 arranged at intervals. The connecting conductive wire 7 is disposed at the opposite end of the composite material 11. One connection conductive line 7m short-circuits one end portions of the ear threads 5. Another connection conductive line 7n that is not connected to the connection conductive line 7m short-circuits the other end portions of the ear threads 5.
Moreover, the metal fastener 8 is arrange | positioned at the both ends of one connection conductive line 7m. Similarly, the metal fastener 8 is arrange | positioned at the both ends of the other connection conductive line 7n.

  The composite material 11 of the present embodiment can be used as a conductive material such as a lightning resistant material, an antistatic material, and a heater material in addition to the electromagnetic shielding material.

By fixing the required number of composite materials 11 to the body frame, the ear threads 5 are conducted to the body frame through the connection conductive wires 7 and the metal fasteners 8 and further included in different composite materials 11 through the body frame. The ear threads 5 are electrically connected.
When the aircraft is subjected to lightning, the electricity is conducted to the entire aircraft by metal parts such as the ear thread 5, the connection conductive wire 7n, the metal fastener 8, and the aircraft frame. Thereby, damage to the composite material 11 etc. by lightning can be prevented.
Similarly, static electricity can escape to the entire aircraft and avoid local accumulation.

  On the other hand, the ear thread 5 can be used as a heater wire. If one of the connecting conductive wires 7m and the other connecting conductive wire 7n is connected to the power source through the metal fastener 8 with the opposite electrodes as a reverse electrode and energized between both electrodes, the ear threads 5 generate heat as an electric resistor, defrost, Or it functions as anti-icing. Nickel alloys (nickel / chromium wire, Inconel wire, etc.) are used for metal ear yarn fibers. This is a material effective as an electric resistance wire and a heat-resistant metal fiber, and is a material that does not have to worry about contact with CFRP.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a plan view showing a three-dimensional fiber-reinforced resin composite material according to a third embodiment of the present invention.

  The three-dimensional fiber reinforced resin composite material 12 of the present embodiment is different from the composite material 11 of the second embodiment in the configuration of the connection conductive wires 7 and the other parts are the same.

As shown in FIG. 3, the connection conductive wire 7 a is disposed at the end of the composite material 12. The connection conductive line 7b is disposed obliquely with respect to the connection conductive line 7a. The connection conductive line 7c is disposed at the end of the composite material 12 on the opposite side to the connection conductive line 7a.
The connection conductive line 7 a and the connection conductive line 7 c are arranged in parallel to each other along opposite edges, and are orthogonal to the ear threads 5. The connection conductive line 7b is arranged along one diagonal line.

Metal fasteners 8 are provided on the squares of the composite material 12. The connection conductive line 7a is connected to the metal fastener 8a, and is not connected to the other metal fastener 8 and the connection conductive line 7 including the metal fastener 8b and the connection conductive line 7b.
The connection conductive wire 7b is connected to the metal fastener 8b at one end and to the metal fastener 8c at the other end.
The connection conductive line 7c is connected to the metal fastener 8d, and is not connected to the other metal fastener 8 and the connection conductive line 7 including the metal fastener 8c and the connection conductive line 7b.

  Similar to the second embodiment, the composite material 12 of the present embodiment can be used as a conductive material such as a lightning resistant material, an antistatic material, and a heater material in addition to the electromagnetic shielding material.

  Further, by detecting a change in resistivity between the connecting conductive wire 7a (connecting conductive wire 7c) and the connecting conductive wire 7b disposed obliquely thereto, the ear thread 5 can be checked whether the outer surface of the composite material 12 is damaged or not. It becomes possible to function as an impact damage detection sensor.

In this composite material 12, the flaw detection range is divided into two areas A and B by connecting conductive wires 7b arranged on a diagonal line.
According to the impact damage detection sensor using the ear thread 5 of the composite material 12 configured as described above, it is possible to specify whether the damaged portion belongs to the area A or B. Further, according to such an impact damage detection sensor, the length of the ear thread 5 between the connection conductive line 7b arranged obliquely and the connection conductive line 7a (connection conductive line 7c) at one end of the ear thread is stepwise. Therefore, by detecting the total resistance value during this period and analyzing the minute resistivity change due to partial ear thread breakage, the cut ear thread line No. (AP in the figure, ap) ) Can be specified.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 is a plan view showing a three-dimensional fiber reinforced resin composite material according to a fourth embodiment of the present invention.

  The three-dimensional fiber reinforced resin composite material 13 of the present embodiment is different from the composite material 11 of the second embodiment in the configuration of the connection conductive wires 7 and the other parts are the same.

  As shown in FIG. 4, the two connection conductive lines 7 and 7 are arranged along different diagonal lines of the composite material 13, and intersect each other on the diagonal lines so as to be conductive. That is, the two connection conductive lines 7 and 7 are connected at the intersection. Each connection conductive line 7 crosses diagonally with respect to the ear thread 5 and short-circuits the ear thread 5. Each connection conductive line 7 is connected to a metal fastener 8 positioned diagonally at both ends thereof.

  Similar to the second embodiment, the composite material 13 of the present embodiment can be used as a conductive material such as a lightning resistant material and an antistatic material in addition to the electromagnetic shielding material.

  In particular, when used as a lightning-resistant material, the surface of the composite material 13 is divided into four diagonal lines, so that the portion subjected to lightning and the connection conductivity are applied to the outer surface of the same area of the composite material 11 of the second embodiment. There is an effect of reducing the lightning damage area because the position with the line 7 is close.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a plan view showing a three-dimensional fiber reinforced resin composite material according to a fifth embodiment of the present invention.

  The three-dimensional fiber reinforced resin composite material 14 of the present embodiment is different from the composite material 11 of the second embodiment in the configuration of the connection conductive wires 7 and the external electrode terminals 9, and the others are the same.

  As shown in FIG. 5, the two connection conductive lines 7 d and 7 f are arranged along different diagonal lines of the composite material 13, and intersect with each other in the out-of-plane direction at intersections of the diagonal lines. That is, the two connection conductive lines 7d and 7f are not connected. For example, the connection conductive line 7d is arranged on the front surface, and the connection conductive line 7f is sewn so as to be arranged between the in-plane direction threads or the back surface at the intersection with the connection conductive line 7d, so that such a structure is configured. . The two connection conductive lines 7d and 7f cross each other obliquely with respect to the ear thread 5, and short-circuit the ear threads 5 with each other. The connection conductive lines 7d and 7f are connected to the metal fasteners 8 positioned diagonally at both ends thereof.

  The connection conductive line 7e is disposed along the edge at the end of the composite material 14. The connection conductive line 7e connects the metal fastener 8f at one end of the connection conductive line 7d and the metal fastener 8g at one end of the connection conductive line 7f, and short-circuits the ear threads 5 to each other.

  The connection conductive line 7g is arranged in parallel with the connection conductive line 7e along the edge at the end of the composite material 14 opposite to the connection conductive line 7e. At this end, an external electrode terminal 9 is provided adjacent to the metal fastener 8e to which the other end of the connection conductive wire 7d is connected. The metal fastener 8e and the external electrode terminal 9 are not connected. One end of the connection conductive wire 7 g is connected to the metal fastener 8 h and the other end is connected to the external electrode terminal 9. The external electrode terminal 9 is an electrode terminal for external connection.

  Similar to the second embodiment, the composite material 13 of the present embodiment can be used as a conductive material such as a lightning resistant material and an antistatic material in addition to the electromagnetic shielding material.

  Further, the composite material 13 can be used as an antenna having the metal fastener 8e and the external electrode terminal 9 as two terminals. The composite material 13 serving as an antenna can capture radio waves incident from all vertical, horizontal, and diagonal directions.

It is a top view which shows the three-dimensional fiber reinforced resin composite material of 1st Embodiment of this invention. It is a top view which shows the three-dimensional fiber reinforced resin composite material of 2nd Embodiment of this invention. It is a top view which shows the three-dimensional fiber reinforced resin composite material of 3rd Embodiment of this invention. It is a top view which shows the three-dimensional fiber reinforced resin composite material of 4th Embodiment of this invention. It is a top view which shows the three-dimensional fiber reinforced resin composite material of 5th Embodiment of this invention. It is sectional drawing which shows the structural example of the past and this invention.

Explanation of symbols

3 In-plane direction thread 4 Sewing thread 5 Ear thread 7 Connection conductive wire 8 Metal fastener (external electrode terminal)
9 External electrode terminal

Claims (13)

In the three-dimensional fiber reinforced resin composite material in which a resin is impregnated and cured in a reinforced fiber fabric that is formed by sewing a sewing thread while being engaged with an ear thread into a fabric formed by an in-plane direction thread.
The three-dimensional fiber reinforced resin composite material, wherein the ear yarn is made of a conductive material having higher conductivity than the in-plane direction yarn , and the sewing yarn is made of glass fiber, carbon fiber, or organic fiber . The three-dimensional fiber reinforced resin composite material according to claim 1, wherein the ear thread is made of a metal material. In the three-dimensional fiber reinforced resin composite material in which a resin is impregnated and cured in a reinforced fiber fabric that is formed by sewing a sewing thread while being engaged with an ear thread into a fabric formed by an in-plane direction thread.
The in-plane direction yarn is made of glass fiber or carbon fiber, the ear yarn is made of a metal material ,
A three-dimensional fiber reinforced resin composite material in which the sewing thread is composed of glass fiber, carbon fiber, or organic fiber . The three-dimensional fiber-reinforced resin composite material according to any one of claims 1 to 3, wherein the ear thread is configured to contain copper, aluminum, nickel, iron, or titanium as a main component. . The three-dimensional fiber according to any one of claims 1 to 3, wherein the in-plane direction yarn is composed of carbon fiber, and the ear yarn is composed of nickel as a main component. Reinforced resin composite material. The three-dimensional fiber reinforced resin composite material according to claim 1, wherein the ear threads are covered with a metal film. The three-dimensional fiber-reinforced resin composite material according to any one of claims 1 to 6, further comprising a connection conductive material that short-circuits the ear threads arranged at intervals. The ear threads are arranged in parallel at a distance, and one connection conductive material that short-circuits one end portions of the ear threads, and the other end portions of the ear threads that are not connected to the connection conductive material The three-dimensional fiber reinforced resin composite material according to any one of claims 1 to 6, characterized by comprising: The ear threads are arranged in parallel at a distance, and one connecting conductive material that short-circuits the ear threads, and another connection conductor that is not connected to the connecting conductive material and that is diagonally disposed and short-circuits the ear threads. The three-dimensional fiber reinforced resin composite material according to any one of claims 1 to 6, further comprising a connection conductive material. The ear thread is arranged in parallel with a gap, and includes two connecting conductive materials that intersect with the ear thread so that the ear threads can be short-circuited with each other and can be electrically connected to each other. The three-dimensional fiber reinforced resin composite material according to claim 6. The three-dimensional fiber-reinforced resin composite material according to any one of claims 7 to 10, wherein an electrode terminal for external connection that is electrically connected to the connection conductive material is formed. The ear threads are arranged in parallel and spaced apart;
Two connecting conductive materials that intersect the ear threads so that they can be short-circuited with each other, and that are spaced apart from each other in the out-of-plane direction;
Other connection conductive materials that connect one end portions of the two connection conductive materials;
The three-dimensional fiber reinforced resin composite according to any one of claims 1 to 6, further comprising an electrode terminal for external connection conducted to each other end of the two connection conductive materials. Wood. The three-dimensional fiber-reinforced resin composite material according to any one of claims 7 to 12, wherein the connection conductive material is woven into the reinforcing fiber fabric.

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