JP2011196012A - Composite material and production method thereof and apparatus using this composite material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite material that is easy to process, low cost, excellent in impact resistance, high hardness, good radio wave permeability, can form a smooth surface, and has good mass productivity.
SOLUTION: In a composite material composed of a reinforcing material and a base material (matrix) formed on at least one surface of the reinforcing material, the reinforcing material is made of a cloth using high-strength fibers, and the matrix is resistant to penetration. It is a composite material that is a coating film formed by spraying a synthetic resin paint having peeling resistance, impact resistance, and abrasion resistance. The synthetic resin paint used as the coating film is efletane.
[Selection] Figure 1

Description

  The present invention relates to a composite material that is easy to process, excellent in impact resistance, high hardness, good radio wave permeability, and capable of forming a smooth surface, a manufacturing method thereof, and an apparatus using the composite material.

In general, camping tents installed outdoors, radomes for protecting antennas, reflectors that reflect radio waves, shielding materials that shield radio waves, balloons, buoys installed on the sea, smoke exhaust ducts, tanks, Helmets, yachts and other ships, outdoor sporting goods, vehicles, housing materials, and the like are often damaged or broken by external factors such as wind and rain or impact.
In addition, residential materials used indoors, IC tags attached to products, bulletproof vests, and Android, woodwork products, metal products, and toys used in various experiments are damaged by various impacts and have poor durability. .

In order to prevent such damage and breakage and improve durability, it is necessary to add a protective device to each or use a durable member for each. Problems such as weight increase could not be avoided. To solve these problems, FRP (Fiber
Various composite materials have been devised and used, including Reinforced Plastics.

  As what uses various composite materials, for example, as described in Patent Document 1, a pallet used as a platform for a forklift is a foam pallet made of a synthetic resin foam molding. There is one in which a urethane resin film is coated on the surface of the foam pallet.

  Moreover, as described in Patent Document 2, there is a radome made of a flexible composite cloth material, which includes a polyester-polyarylate fiber in a flexible resin matrix material.

JP-A-8-276934 Special table 2007-532019

  The foamed pallet made of the synthetic resin foam molded body described in Patent Document 1 is coated with a urethane resin film on its surface. This urethane resin film is adhesive to the foamed pallet. Is good and can strengthen the hardness.

  However, composite materials that are easy to process, have excellent impact resistance, have high hardness, and can form a smooth surface are not required, but can be applied only to foamed moldings of synthetic resins. It was.

  Moreover, the radome which consists of a flexible composite cloth material of the said patent document 2 is also using what made the polyurethane resin instead of polyester as a flexible resin matrix.

  However, the polyester resin and polyurethane resin used as a flexible resin matrix take time to cure even when a two-component reaction type resin composed of a main agent and a curing agent is used. Time for curing and drying of the matrix is required. Therefore, when manufacturing a radome made of a composite material, there is a problem that it takes time, labor, and cost to process, and mass productivity is poor, which is easy to process, low cost, excellent impact resistance, high hardness, radio wave There has been a demand for a composite material that has good permeability, can form a smooth surface, and has good mass productivity.

  The invention according to claim 1 is a composite material comprising a reinforcing material and a base material (matrix) formed on at least one surface of the reinforcing material, wherein the reinforcing material is made of cloth, and the matrix is made of permeation resistance, It is a composite material that is a coating film formed by applying a synthetic resin paint having peelability, impact resistance, and wear resistance.

  The invention according to claim 2 is the invention according to claim 1, wherein the coating film is a synthetic resin paint composed of a main agent and a curing agent, and sprayed simultaneously by a nozzle for the main agent and a nozzle for the curing agent, respectively. It is the composite material formed by.

  An invention according to claim 3 is the invention according to claim 2, wherein the coating film is a composite material using Efletane (registered trademark).

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the reinforcing material cloth is a composite material using high-tensile fibers.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the coating film is a composite material using a member having a small radio wave transmission loss.

  The invention according to claim 6 is a method for producing a composite material comprising a reinforcing material and a base material (matrix) formed on at least one surface of the reinforcing material, after removing dirt on the surface of the cloth reinforcing material. The matrix formed on one side of the fabric reinforcement is a composite material made of a coating film formed by applying a synthetic resin paint having penetration resistance, peel resistance, impact resistance, and wear resistance. It is a manufacturing method.

  The invention according to claim 7 is the invention according to claim 6, wherein the coating film is formed by simultaneously spraying a synthetic resinous paint composed of a main agent and a curing agent from a nozzle for the main agent and a nozzle for the curing agent, respectively. It is the manufacturing method of the composite material which apply | coated and formed the said coating film.

  The invention according to claim 8 is the method for producing a composite material according to claim 7, wherein the coating film is formed using efletane as a synthetic resin paint.

  The invention according to claim 9 is the method for producing a composite material in which, in the invention according to any one of claims 6 to 8, the surface of the coating film is heated and pressurized.

  The invention according to claim 10 is a composite material composed of a reinforcing material and a base material (matrix) formed on at least one surface of the reinforcing material, and a reinforcing material obtained by forming a cloth material into the shape of a radome; Using a composite material made of a coating film formed by applying a synthetic resin paint having penetration resistance, peel resistance, impact resistance, and abrasion resistance to the surface of a radome-shaped cloth material It is the formed radome.

  The invention according to claim 11 is the invention according to claim 10, wherein the coating film uses a member having a small radio wave transmission loss, and a synthetic resin paint composed of a main agent and a curing agent is used for each main agent. It is a radome formed by using a composite material formed by spraying and applying simultaneously with a nozzle and a nozzle for a curing agent.

  The invention according to claim 12 is the radome according to the invention according to claim 11, wherein the coating film is formed using a composite material using efletane.

  According to a thirteenth aspect of the present invention, in the invention according to any one of the tenth to twelfth aspects of the present invention, the reinforcing cloth material is a radome formed using a composite material using high-tensile fibers.

  Since the invention according to claim 1 is configured as described above, cloth is used as the reinforcing material, and the matrix is made of a synthetic resin paint having penetration resistance, peel resistance, impact resistance, and wear resistance. Since it is a coating film formed by coating, it has penetration resistance, peel resistance, impact resistance, and wear resistance, and is lightweight, and an unprecedented excellent composite material can be obtained.

  Since the invention according to claim 2 is configured as described above, the same effect as that of claim 1 is obtained, and the coating film as the matrix is simultaneously spray-coated from the nozzle for the main agent and the nozzle for the curing agent, respectively. Therefore, the coating film can be cured quickly and the manufacturing time can be shortened. Also, depending on the type of reinforcing material, there is flexibility, and a mold can be held by a coating film even with a soft cloth, so that the moldability is good. Further, a composite material having a large specific strength (ratio of weight to strength) and good durability can be obtained.

  Since the invention according to claim 3 is configured as described above, it has the same effect as that of claim 2, and furthermore, since the coating film has a fast curing property, it is extremely easy to process and is used in a matrix. The manufacturing process for curing and drying the synthetic resin can be omitted, the manufacturing time, labor and cost can be reduced, and the mass productivity is extremely good. Furthermore, since it has a low viscosity and fast curability, it can be applied to even a coarse cloth, and a paint film can be formed on any cloth product.

  Since the invention according to claim 4 is configured as described above, it has the same effects as those of claims 1 to 3, and further, since the reinforcing material cloth uses high-tensile fibers, the tensile strength is improved. A large composite is obtained.

  Since the invention according to claim 5 is configured as described above, it has the same effects as those of claims 1 to 4, and furthermore, the coating film uses a member having a small radio wave transmission loss, so that it is wireless. It can be used in the field of communications, and composite materials with a wide range of applications can be obtained.

  Since the invention according to claim 6 is configured as described above, cloth is used as the reinforcing material, and the matrix is made of a synthetic resin paint having penetration resistance, peel resistance, impact resistance, and wear resistance. Because it is a coating film formed by coating, it has penetration resistance, peel resistance, impact resistance, wear resistance, light weight, and easy to manufacture an excellent composite material that has never been is there. In addition, an inexpensive composite material can be obtained.

  Since the invention according to claim 7 is configured as described above, it has the same effect as that of claim 6, and the coating film is made of a synthetic resin paint composed of a main agent and a curing agent, respectively. Since the coating film was formed by spraying simultaneously from the nozzle for the curing agent and the coating agent, a composite material with a simple manufacturing method and low cost can be obtained.

  Since the invention according to claim 8 is configured as described above, it has the same effect as that of claim 7, has penetration resistance, peel resistance, impact resistance, wear resistance, is lightweight, Because it uses a material with low transmission loss of radio waves, it can be used in the field of wireless communications, and it has a wide range of applications. A composite material is obtained. In addition, the coating film is fast-curing, so it is extremely easy to process, eliminates the manufacturing process for curing and drying the synthetic resin used in the matrix, and reduces manufacturing time, labor, and cost. It is possible and the mass productivity is very good. Furthermore, since it has a low viscosity and fast curability, it can be applied to even a coarse cloth, and a paint film can be formed on any cloth product.

  Since the invention according to claim 9 is configured as described above, it has the same effects as those of claims 6 to 8, and the surface of the coating film is heated and pressurized, so that the surface of the coating film is Can be formed smoothly.

  Since the invention according to claim 10 is configured as described above, a cloth is used as the reinforcing material, and the matrix is made of a synthetic resin paint having penetration resistance, peeling resistance, impact resistance, and abrasion resistance. Since it is a coating film formed by coating, it has penetration resistance, peel resistance, impact resistance, and abrasion resistance, and is light in weight, and an unprecedented superior radome can be obtained.

  Since the invention according to claim 11 is configured as described above, the effect similar to that of claim 10 is obtained, and the coating film uses a member having a small radio wave transmission loss and is composed of a main agent and a curing agent. Since the resin paint was formed by spraying and coating simultaneously with the main agent nozzle and the hardener nozzle respectively, the radome manufacturing method is simple, the manufacturing time can be shortened, and the radome cost can be reduced. It can be reduced.

  Since the invention according to claim 12 is configured as described above, it has the same effect as that of claim 11, and has penetration resistance, peel resistance, impact resistance, wear resistance, light weight, Because it uses a material with low transmission loss of radio waves, it can be used in the field of wireless communications, and it has a wide range of applications. A radome is obtained. In addition, the coating film is fast-curing, so it is extremely easy to process, eliminates the manufacturing process for curing and drying the synthetic resin used in the matrix, and reduces manufacturing time, labor, and cost. It is possible and the mass productivity is very good. Furthermore, since it has a low viscosity and fast curability, it can be applied to even a coarse cloth, and a paint film can be formed on any cloth product.

  Since the invention according to claim 13 is configured as described above, it has the same effects as those of claims 10 to 12, and the reinforcing material cloth is made of high-tensile fiber, so that the tensile strength is high. A large composite material is obtained, and an unprecedented superior radome is obtained.

FIG. 4 is a view showing an example of the present invention, and showing transmission loss of a composite material formed using the composite material manufacturing method according to the present invention with respect to various high-tensile fibers and transmission loss of typical FRP. 1, showing an embodiment of the present invention, is a sectional view of a radome when the composite material according to the present invention is applied to the radome.

  In a composite material consisting of a reinforcing material and a base material (matrix) formed on at least one surface of this reinforcing material, the reinforcing material is made of a fabric using high-tensile fibers, and the matrix is resistant to penetration and peeling. The composite material is a coating film formed by applying a synthetic resin paint having impact resistance and wear resistance. The coating film is formed by simultaneously spraying a synthetic resin paint composed of a main agent and a curing agent with a nozzle for the main agent and a nozzle for the curing agent, and uses efletane.

A first embodiment of the present invention will be described in detail with reference to FIG.
FIG. 1 shows an embodiment of the present invention, and shows the transmission loss of a composite material formed by using the composite material manufacturing method according to the present invention for various high-tensile fibers and the transmission loss of a typical FRP. FIG.

  First, in order to prepare the composite material according to the present invention, the inventors prepared a synthetic resin and a cloth reinforcing material used as a matrix (base material) of the composite material. In the first embodiment of the present invention, Efretan (registered trademark), which is a kind of urethane resin, is used as the synthetic resin matrix, and the ultrahigh molecular weight polyethylene dynea (high-tensile fiber) is used as the reinforcing material. (Registered trademark) formed into a cloth shape was used. Efletane is a kind of solvent-free urethane resin, is waterproof, has high dry hardness, is tough, has excellent impact resistance and wear resistance, and is mainly used as a resin for coating polystyrene foam. Moreover, efletane is a two-component low-viscosity liquid urethane resin composed of a main agent and a curing agent, and has a fast curing property that cures in a few seconds when these two solutions are reacted. In particular, the composite material according to the present invention utilizes the rapid curing property of efletane. Dyneema, on the other hand, is a lightweight fiber with high strength, high elastic modulus, low elongation. In the first embodiment of the present invention, the reinforcing material is a high-tensile fiber formed in a cloth shape, but a non-woven fabric may be used.

  Next, the inventors sprayed the main component of efletane and the curing agent simultaneously on the surface of the reinforcing material, Dyneema, which was formed into a cloth shape, and performed coating. By this spray coating, the inventors formed a coating film of efletane as a matrix on one side of the reinforcing material, and formed a composite material according to the present invention. In this embodiment, efletane is applied twice, and each is coated to a thickness of 1 mm. Furthermore, the coating film surface may be smoothed or defoamed by heating and pressurizing the surface of the coating film, which is a matrix of the composite material thus formed. However, when forming the composite material according to the present invention, it is not necessary to perform heating and pressurizing treatment for impregnating the reinforcing material with a matrix such as general spray-up molding or for molding. In addition to being able to form a composite immediately due to the fast curing properties of efletane, it is also possible to readjust the molding of the composite by heating and pressurizing the composite. In the first embodiment of the present invention, a coating film as a matrix is formed on one surface of a reinforcing material formed in a cloth shape, but a coating film may be formed on both surfaces of the reinforcing material. In order to form the composite material according to the present invention, a coating film as a matrix may be formed on at least one surface of the reinforcing material formed in a cloth shape.

  Furthermore, the inventors prepared as a reinforcing material what formed high-tensile fibers other than Dyneema in a cloth shape in order to verify the difference in characteristics due to the difference in reinforcing material. As other high-tensile fibers, the inventors prepared Kevlar (registered trademark), which is an aromatic polyamide resin, Vectran (registered trademark), and Zylon (registered trademark), which are polyarate fibers. The synthetic resin used as a matrix remains the eflet for the reinforcing material formed of these high-tensile fibers in the form of cloth, and the inventors have prepared the composite material according to the present invention by using the above-mentioned methods, respectively. did. In addition, the inventors prepared several representative FRPs in order to compare the properties with these composite materials according to the present invention. These FRPs are a total of 10 typical FRPs in which the matrix is a vinyl ester resin and an epoxy resin, the reinforcing material is Dyneema, Kevlar, Vectran, Zylon, and glass, and the matrix and the reinforcing material are combined.

  FIG. 1 shows the measurement results of transmission loss using the composite material according to the present invention thus prepared and a typical FRP.

  In FIG. 1, the vertical axis represents the synthetic resin used as the matrix, the horizontal axis represents the high-tensile fiber used in the reinforcing material formed in the cloth shape, and the transmission loss when the measurement frequency band is 75-110 GHz band ( dB). From the results shown in FIG. 1, it was found that the composite material according to the present invention has low transmission loss as compared with typical FRP including GFRP (Glass Fiber Reinforced Plastics).

  In addition, from the results shown in FIG. 1, when comparing the transmission loss of the composite material according to the present invention and FRP when using the same reinforcing material, except for the case where the reinforcing material is made of xylon in a cloth shape. The transmission loss of the composite material according to the present invention was about half that of the FRP, and it was found that the transmission loss characteristics were improved.

  In this example, the synthetic resin used as the matrix of the composite material according to the present invention uses efletane, but it has a fast-curing property and has a low transmission loss to radio waves and a certain level of strength. Any resin may be used. For example, instead of the eflet used in the first embodiment of the present invention, foot lash (registered trademark) which is a kind of polyurethane resin may be used.

  In addition, since efletane, which is a synthetic resin used as a matrix in this embodiment, is a two-component reaction type resin as described above, the efletane main agent and the curing agent are simultaneously sprayed and cured by two nozzles. Although a coating film is formed by coating, a synthetic resin used as a matrix may be coated with a single nozzle by using a resin that hardens immediately when oxidized, for example. .

  Furthermore, unlike the FRP manufacturing method, the composite material manufacturing method according to the present invention does not require the reinforcement to be impregnated with the matrix, and does not need to be bonded with an adhesive or the like. It is only necessary to form a coating film by simply applying a resin having a fast-curing property such as efletane, a low transmission loss to radio waves, and a certain level of strength to the reinforcing material. Easy. In addition, while FRP has a long curing time, it is poor in mass productivity, whereas the composite material according to the present invention has a very short curing time due to the rapid curing property of efletan, which is a synthetic resin used as a matrix. .

  Further, efletane, which is a synthetic resin used as a matrix of a composite material according to the present invention, is a substance having properties as a release agent or a release agent on the surface of fibers or reinforcements used in a reinforcing material formed in a cloth shape. Since the coating film can be formed on any material as long as it is not already applied, there is a wide range of selection of a member that can be used as a reinforcing material and a wide range of application as a composite material.

  Furthermore, when forming a large member, it is not necessary to mold using a mold or the like, and it is convenient because it can be molded simply by applying ephretan, which is a synthetic resin used as a matrix of the composite material according to the present invention.

  A second embodiment of the present invention will be described in detail with reference to FIG. FIG. 2 shows an embodiment of the present invention and is a cross-sectional view of a radome when the composite material according to the present invention is applied to the radome.

  Examples after the second example of the present invention are examples describing application examples of the composite material of the first example. The same parts as those in the first embodiment are denoted by the same names and the same numbers, and the description thereof is omitted.

  The second embodiment of the present invention is an application example in which this composite material is used for a radome utilizing the property of transmission loss with respect to radio waves of the composite material of the first embodiment. Hereinafter, the manufacturing method of this radome 1 is demonstrated based on FIG.

  In FIG. 2, the radome 1 is comprised from the reinforcing material 2 and the coating film 3 (3a, 3b) which is a matrix. As the reinforcing material 2, an ultra high molecular weight polyethylene dynea made in a cloth shape is used, and the synthetic resin used in the coating film 3 that is a matrix uses efletane that is a kind of urethane resin.

  First, the inventors form a cloth-like reinforcing material 2 so as to have the shape of the radome 1 shown in FIG. 2, using a mold having a general radome shape such as the shape of the radome 1 shown in FIG. At the same time, the reinforcing material 2 thus molded was temporarily positioned.

  Next, the inventors performed spray coating of efletane on the surface of the reinforcing material 2 temporarily positioned in this way, and formed a coating film 3 a on one surface of the reinforcing material 2. As in the first embodiment, the eflet is applied twice, and the coating film 3 is formed by applying the eflet to a thickness of 1 mm. The coating film 3a is immediately formed on one surface of the reinforcing material 2 due to the high hardness in the dry state of the efletane used in the coating film 3 and its rapid curability, and after forming the coating film 3a, A mold for temporarily positioning the reinforcing material 2 becomes unnecessary.

  After removing the mold, the other surface of the reinforcing material 2 is similarly sprayed with efretane to form a coating film 3b, and the inventors form a composite material according to the present invention, A radome 1 using a composite material was molded. Here, the surface of the coating film 3a, 3b may be heated and pressurized to smooth or defoam the surface of the coating film 3.

  In this embodiment, the coating film 3 is formed on both surfaces of the reinforcing material 2. However, as described in the first embodiment, the coating film 3 may be formed on at least one surface of the reinforcing material 2. In this case, it is preferable to form the coating film 3a outside the radome 1 from the viewpoint of utilizing the weather resistance of the efletane used in the coating film 3.

  Further, as described above, by using the composite material manufacturing method according to the present invention, the processing for forming the radome 1 becomes extremely easy. Therefore, by using the composite material manufacturing method according to the present invention, not only the shape of the radome 1 shown in FIG. 2 but also a spherical surface is approximated by an icosahedron, and a large number of structural materials combined in an equilateral triangle are arranged there. All the representative structures of the radome including the geodesic structure which is a dome-shaped structure formed by the above can be easily formed.

A third embodiment of the present invention will be described in detail.
In the third embodiment of the present invention, the composite material manufacturing method according to the present invention is used as a radio wave source such as an IC tag utilizing the property of transmission loss with respect to radio waves of the composite material of the first embodiment. This is an application example. In addition, about the same part as 1st Example-2nd Example, the same name and the same number are used and the description is abbreviate | omitted.

  In the third embodiment of the present invention, the synthetic resin used as the matrix of the composite material uses efretane, and the reinforcing material is made of high-strength fibers such as Dyneema, unlike the first and second embodiments. What formed in the shape of cloth is not used, but what used the fiber generally used in the shape of cloth is used.

  As mentioned above, efletane, a synthetic resin used as a matrix for this composite material, has a low viscosity and fast curing properties. A film can be formed.

  First, a case where an IC tag is attached to a cloth product such as clothes on which a mark or a pattern is printed will be described.

  First, efletan is sprayed onto the surface of the fabric product to be printed to form a base coating film. Next, an IC tag is placed on the coating film as the base, and efletane is sprayed onto the base coating film and the IC tag. By this spray coating, a coating film is further formed on the base coating film and the IC tag, and the IC tag is firmly enclosed in the coating film. By encapsulating the IC tag in the coating film made of efletane in this way, the encapsulated IC tag is protected by the high hardness, toughness, excellent impact resistance, and wear resistance of the efletane. In addition, the waterproofness of the eflet allows it to be soaked in water such as washing with the IC tag attached. In this way, after enclosing the IC tag, a mark or pattern may be printed on the surface of the coating film.

  Instead of the IC tag, the clothes were worn by enclosing the GPS receiver for positioning and the transmitter for transmitting the positioning data in the coating film by the above method. The positioning of a person can be performed, and for example, it can be applied to grasping the position of a person who hesitates. Further, such a GPS receiver or the like may be enclosed in a uniform of an occupation (for example, a guard) who needs to know the position of the employee.

  This invention is a field tent installed outdoors, a radome for protecting antennas, a reflector that reflects radio waves, a shielding material that shields radio waves, a balloon, a buoy installed on the sea, a smoke exhaust duct, Tanks, helmets, yachts and other ships, outdoor sports equipment, vehicles, housing materials, indoor housing materials, IC tags attached to products, bulletproof vests, androids used in various experiments, woodwork products, metal products It can be used for toys.

1 Radome 2 Reinforcement 3 (3a, 3b) Painted film (matrix)

Claims (13)

In a composite material composed of a reinforcing material and a base material (matrix) formed on at least one surface of the reinforcing material,
The reinforcement is made of cloth,
The composite is characterized in that the matrix is a coating film formed by applying a synthetic resin paint having permeation resistance, peel resistance, impact resistance, and abrasion resistance. 2. The composite according to claim 1, wherein the coating film is formed by simultaneously spraying a synthetic resin paint composed of a main agent and a curing agent from a nozzle for the main agent and a nozzle for the curing agent, respectively. Wood. The composite material according to claim 2, wherein efletane is used for the coating film. The composite material according to any one of claims 1 to 3, wherein high-strength fibers are used as the reinforcing material cloth. The composite material according to any one of claims 1 to 4, wherein the coating film is a member having a small radio wave transmission loss. In a method for producing a composite material comprising a reinforcing material and a base material (matrix) formed on at least one surface of the reinforcing material,
After removing the dirt on the surface of the fabric reinforcement,
The matrix formed on one surface of the cloth reinforcing material is a coating film formed by applying a synthetic resin paint having permeation resistance, peel resistance, impact resistance, and wear resistance. A method for producing a composite material. The coating film is formed by simultaneously spraying and applying a synthetic resin paint composed of a main agent and a curing agent from a nozzle for a main agent and a nozzle for a curing agent, respectively. 6. A method for producing a composite material according to 6. The method for manufacturing a composite material according to claim 7, wherein the coating film is formed using efletane as the synthetic resin coating. The method for producing a composite material according to any one of claims 6 to 8, wherein the surface of the coating film is heated and pressurized. In a composite material composed of a reinforcing material and a base material (matrix) formed on at least one surface of the reinforcing material,
The reinforcing material formed by forming a cloth material into the shape of a radome;
The matrix comprising the coating film formed by applying a synthetic resin paint having penetration resistance, peel resistance, impact resistance, and abrasion resistance to the surface of the radome-shaped cloth material. A radome formed using a characteristic composite material. The coating film was formed by using a member having a small radio wave transmission loss and simultaneously spraying and applying a synthetic resin paint composed of a main agent and a curing agent using a nozzle for the main agent and a nozzle for the curing agent, respectively. A radome formed using the composite material according to claim 10. The radome formed using the composite material according to claim 11, wherein the coating film is made of efletane. The radome formed using the composite material according to any one of claims 10 to 12, wherein the reinforcing fabric material is high-strength fiber.

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