JP6036350B2 - Aluminum coated composite panel - Google Patents

Description

  The present invention relates to an aluminum-coated fiber-reinforced plastic panel in which an aluminum sheet is bonded to the surface of a fiber-reinforced plastic using thermoplastic fibers as a matrix resin. In particular, a fiber-reinforced plastic molded body that can be molded in a short time and has high flame resistance and strength using a thermoplastic resin called super engineering plastic, which has high heat resistance and high flame resistance as the matrix resin. The present invention relates to a fiber reinforced plastic panel having an aluminum sheet bonded to the surface.

As a lightweight and high-strength composite material, a resin molded body reinforced with reinforcing fibers such as carbon fiber and glass fiber is generally called FRP and is used in various fields such as sports, leisure goods, and aircraft materials. In many cases, a thermosetting resin such as an epoxy resin, an unsaturated polyester resin, or sometimes a phenol resin is mainly used as a matrix in the carbon fiber reinforced resin molded body. However, in the case of these thermosetting resins, the impact resistance of the fiber reinforced resin molded article is inferior, and when the resin is impregnated into a fiber as a material before curing to make a prepreg, refrigeration storage is necessary and the pot life is reduced. There is a drawback that it is limited and cannot be stored for a long time.
Furthermore, the thermosetting resin needs to be cured by polymerization reaction in a state heated to a temperature of about 122 ° C. to 177 ° C. However, since the polymerization reaction takes about 2 hours, the heat molding time becomes longer and the production takes place. There is also a difficulty that the nature is low.

  On the other hand, when a thermoplastic resin is used as the matrix resin, the impact resistance of the fiber reinforced resin molding is excellent, and the storage management of the resin and the fiber reinforced resin composite material in a state before molding processing is easy, and simple press molding and the like. Development of a fiber reinforced resin molded article made of a fiber reinforced resin composite material using a thermoplastic resin as a matrix resin, such as polycarbonate resin, polyester resin, polypropylene resin, etc. ing.

  However, a fiber reinforced resin molded article using a thermoplastic resin such as polycarbonate resin, polyester resin, or polypropylene resin as a matrix resin as described above has a thermosetting resin as a matrix resin in terms of heat resistance and flame retardancy. There is a disadvantage that it is inferior to the fiber reinforced resin molded product. Therefore, the present situation is that the use of the fiber reinforced resin molded body in which the thermoplastic resin is a matrix resin is limited.

In recent years, therefore, fiber reinforced plastics have been developed in which a thermoplastic resin having higher heat resistance than that of a normal thermoplastic resin, such as a PPS resin, is used as a matrix resin. Patent Document 1 discloses that FRP can be produced from a nonwoven fabric mat composed of a high-melting-point thermoplastic material and reinforcing fibers.

Japanese Patent No. 4708330

  In recent years, regarding thermoplastic resins used in fiber reinforced plastic moldings, thermoplastic resins having excellent heat resistance and chemical resistance have been actively developed, and heat resistance, which has been a drawback of thermoplastic resins so far, has been developed. Disadvantages such as heat resistance and flame retardancy have been remarkably improved. Such thermoplastic resins are called “super engineering plastics” (super engineering plastics), such as polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polyamide imide (PAI), polyether imide (PEI) and the like. Can be mentioned.

  The thermoplastic resins referred to as “super engineering plastics” not only have excellent strength properties, but also have extremely high flame retardancy, and some have a limiting oxygen index of 30 or more in the state of a resin block. However, some fiber-reinforced plastics using such super engineering plastics have been put into practical use, but they have high mechanical strength (bending and pulling) but are weak in surface strength and easily scratched. There are drawbacks in that the resin gloss is low and it is difficult to obtain a high-quality product appearance.

  In recent years, fiber-reinforced plastic moldings are not limited to just structures, but have been developed for applications such as notebook PC casings, large TV back panels, and automobile hatchback doors. A surface that is difficult to stick is required.

Also, in the field of aircraft parts, etc., the use of fiber-reinforced thermoplastic molded products with excellent productivity is being studied. However, if an adhesive different from conventional aluminum alloy members is not used, In other words, there is a problem that manufacturing management becomes complicated.

Furthermore, when using a fiber-reinforced thermoplastic molded product as a metal substitute, there is a demand for electromagnetic wave and noise shielding properties comparable to those of metal.

  As a means for solving these surface problems and electromagnetic wave shielding problems, it is conceivable to bond a metal foil, such as an aluminum sheet, to the surface of the fiber-reinforced plastic molded body. However, these metal foils and metal sheets are extremely weakly bonded to the super engineering plastic resin and are easily peeled off only by thermocompression bonding. There are means such as applying an adhesive between the metal foil and the reinforced plastic molded body in order to firmly bond, or heating with a hot-melt adhesive sheet interposed therebetween, but this is disadvantageous in terms of productivity and cost. Moreover, since the characteristics of the adhesive layer are significantly different from those of the super engineering plastic resin, problems such as interfacial peeling are likely to occur.

  Other methods for providing the metal layer on the surface of the fiber reinforced plastic molding include plating, vapor deposition, and the like, but in many cases, the strength and adhesion of the metal layer are often insufficient. In addition, there is a problem with the treatment of harmful waste liquid in general with respect to plating.

  In view of such a situation, in the present invention, the surface of a fiber reinforced resin molded article having high strength, high heat resistance, and excellent flame retardancy using a thermoplastic resin having high heat resistance and high flame retardancy as a matrix resin is used. It aims at providing the aluminum covering fiber reinforced resin molding which joined the sheet | seat firmly.

  As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention applied chemicals on the surface of a fiber-reinforced plastic material using a so-called super engineering plastic, a heat-resistant and highly flame-retardant thermoplastic resin as a matrix resin. It was found that the matrix resin sufficiently penetrates and integrates into the roughened layer by thermocompression bonding of the aluminum sheet provided with the roughened layer having a thickness of less than 2 μm by the general treatment, and sufficient adhesive strength is obtained.

The present invention includes the following inventions.
(1) An aluminum-coated fiber-reinforced plastic molded body in which an aluminum sheet is bonded to at least one surface of a fiber-reinforced plastic molded body composed of a reinforced fiber and a matrix resin, and at least a surface of the aluminum sheet in contact with the fiber-reinforced plastic is chemically to have been roughened, the thickness of the roughened layer is Ri der less than 2 [mu] m, the matrix resin component is primarily a limiting oxygen index of 25 or more, the flame燃耐heat super engineering plastic having a softening temperature is 200 ° C. or higher aluminum-coated fiber-reinforced plastic molded body, wherein the resin der Rukoto.

(2) The aluminum-coated fiber-reinforced plastic molding according to ( 1) , wherein the matrix resin is a polyetherimide resin .

(3) An aluminum-coated fiber-reinforced plastic molded body in which an aluminum sheet is bonded to at least one surface of a fiber-reinforced plastic molded body composed of a reinforced fiber and a matrix resin, and at least a surface of the aluminum sheet in contact with the fiber-reinforced plastic is chemically A method for producing an aluminum-coated fiber-reinforced plastic molded body characterized in that the roughened layer has a thickness of less than 2 μm, wherein the fiber-reinforced plastic molded body portion is a reinforcing fiber sheet. and a matrix resin fibers by laminating a matrix resin fiber nonwoven mat produced by a wet paper making, characteristics and be a luer aluminum production process of the coated fiber-reinforced plastic molded body that was fabricated by the heat compression molding.

(4) The fiber-reinforced plastic molded part, characterized in that the mixing nonwoven mat of reinforcing fibers and a matrix resin textiles produced by a wet paper making those prepared by hot pressing die according to (3) A method for producing an aluminum-coated fiber-reinforced plastic molding .

(5) The matrix resin component is a flame-retardant heat-resistant super engineering plastic resin mainly having a limiting oxygen index of 25 or more and a softening temperature of 200 ° C. or more. (3) or (4) A method for producing an aluminum-coated fiber-reinforced plastic molding.
(6) The method for producing an aluminum-coated fiber-reinforced plastic molded article according to any one of (3) to (5), wherein the matrix resin is a polyetherimide resin.

  Heating an aluminum sheet with a roughened layer with a thickness of less than 2μm by chemical treatment on the surface of a fiber-reinforced plastic material using a so-called super engineering plastic, a heat-resistant and flame-retardant thermoplastic resin as a matrix resin By pressure bonding, the matrix resin sufficiently penetrates and integrates into the roughened layer, and a fiber-reinforced plastic molding having an aluminum coating with sufficient adhesive strength is obtained.

  In the present invention, when an aluminum sheet having one side roughened and one side glossy is used, an aluminum-coated fiber-reinforced resin molded article having excellent metallic luster and excellent aesthetics can be obtained.

  In addition, since the surface of the aluminum-coated fiber-reinforced resin molded body in which the aluminum sheet layer of the present invention is firmly bonded is coated with aluminum, good adhesive strength can be obtained with an aluminum bonding adhesive.

  Furthermore, when an aluminum sheet roughened on both sides is used as the surface-roughened aluminum sheet used in the aluminum-coated fiber-reinforced resin molded body, an aluminum-coated fiber-reinforced resin molded body having an outermost surface with very good adhesion. Is obtained.

  Further, the aluminum-coated fiber-reinforced resin molded body in which the aluminum sheet layer of the present invention is firmly bonded has an electromagnetic wave shielding property while being a resin molded body.

  The fiber-reinforced plastic molded body having an aluminum coating with sufficient adhesive strength according to the present invention has at least one surface of a fiber-reinforced plastic molded body composed of reinforcing fibers and a matrix resin, and at least a surface in contact with the fiber-reinforced plastic molded body is chemically It is formed by thermocompression bonding of an aluminum sheet having a roughened layer of less than 2 μm by a general roughening treatment.

[Reinforced fiber plastic molding]
The reinforced fiber plastic molded body used in the present invention is a molded body in a state in which a matrix resin is buried and bonded between reinforced fibers.

[Reinforcing fiber]
The material of the reinforcing fiber used in the present invention is not particularly limited as long as sufficient strength according to the use as the fiber reinforced plastic body can be obtained, inorganic fiber such as glass fiber or carbon fiber, or aramid fiber, It is also possible to use organic fibers having excellent heat resistance such as PBO (polyparaphenylene benzoxazole) fibers. In addition, when using an organic fiber as a reinforced fiber used by this invention, when super engineering plastic resin is used for matrix resin, the molding temperature at the time of forming a molded object may require a high temperature of 200-400 degreeC. Therefore, fibers that do not have a softening point, such as para-aramid fibers and PBO fibers, have a thermal decomposition temperature higher than 400 ° C., or a thermoplastic fiber that has a softening point, and has a softening temperature higher than the molding temperature. Is preferred. Generally, carbon fiber, glass fiber, aramid fiber, ceramic fiber, boron fiber, metal fiber, or the like can be used. In particular, carbon fiber is preferably used in terms of strength per weight, and glass fiber is preferably used in terms of price. The reinforcing fibers may be dispersed in the matrix resin in a cut state, or the continuous fibers may be woven or a reinforcing fiber sheet in which fibers are arranged, and then the matrix resin may be infiltrated.

  The fiber diameter of the reinforcing fiber is not particularly limited, but about 1 to 20 μm is preferably used. When it is thinner than 1 μm, it is difficult to penetrate the matrix resin. When the thickness is larger than 20 μm, the gap between fibers becomes large, and the amount of fibers contained per unit volume cannot be increased, so that it is difficult to obtain sufficient strength as a fiber-reinforced plastic body. Although fiber length is not specifically limited, In the case of cut fiber, 1-20 mm is suitable. When it is shorter than 1 mm, the strength as a fiber-reinforced plastic is lowered. If it is 20 mm or more, handling as a cut fiber becomes difficult. In the case of a woven fabric or a UD (unidirectional) sheet in which fibers are arranged in one direction, continuous fibers may be used.

[Matrix resin]
As the matrix resin constituting the fiber-reinforced plastic molded body of the present invention, a thermoplastic resin is desirable because a simple molding method such as hot press molding can be applied and the surface roughened aluminum sheet can be joined only by thermocompression bonding. In particular, a super engineering plastic resin excellent in heat resistance, flame retardancy, and strength is suitable.

[Super engineering plastic resin]
The super engineering plastic resin used for the matrix resin used in the present invention is desirably a thermoplastic resin having mechanical strength, heat resistance and flame retardancy. Examples of such thermoplastic resins include polyetheretherketone (PEEK), polyamideimide (PAI), polyphenylene sulfide (PPS), polyetherimide (PEI), polyetherketoneketone (PEKK), etc. It is not limited to this.
The super engineering plastic resin preferably has a critical oxygen index of 25 or more and a glass transition temperature of 140 ° C. or more. When the critical oxygen index of the super engineering plastic resin is 25 or more, the flame retardancy is excellent.

In particular, polyetherimide (PEI) resin is preferable because it has a high limiting oxygen index of 47 and generates very little smoke and harmful gas during combustion.
When a polyphenylene sulfide (PPS) fiber is used as the super engineering plastic fiber, the PPS resin has high chemical resistance and high heat resistance. Therefore, a fiber reinforced plastic excellent in chemical resistance and strength at high temperature can be obtained.
In addition, when polyether ether ketone (PEEK) fiber is used as the super engineering plastic fiber, a fiber reinforced plastic that is particularly excellent in chemical resistance and strength at high temperature can be obtained as compared with other super engineering plastics.

In the present invention, the “limit oxygen index” represents an oxygen concentration necessary to continue combustion, and is a numerical value measured by the method described in JIS K7201. That is, a critical oxygen index of 20 or less is a numerical value indicating that combustion is performed in normal air.

[Fiber-reinforced resin molding]
The method for producing the fiber-reinforced resin molded body of the present invention is not particularly limited. A method of heat-kneading reinforced fiber and matrix resin, injection or extrusion molding, a method of injecting matrix resin after placing the reinforced fiber in the mold, and a thermoplastic prepreg by applying or impregnating the matrix resin to the reinforcing fiber sheet Then, a method of heat-press molding, a method of laminating a reinforcing fiber sheet and a matrix resin sheet, a method of heat-press molding, a method of making paper by mixing fibers of reinforcing fiber and matrix resin, and a method of heat-press molding, etc. . In particular, in the case of a large-area, thin molded body, a method in which a material formed into a sheet is heated and pressed is suitable.

[Reinforced fiber sheet]
The reinforcing fiber sheet can be formed by weaving continuous fibers of reinforcing fibers by an arbitrary method or arranging the fibers. Moreover, it is good also as a nonwoven fabric sheet by the method of cutting a reinforcing fiber and making it into a short fiber, and manufacturing a normal nonwoven fabric. In particular, a method in which cut reinforcing fibers are dispersed in water and then made into a sheet, that is, a wet papermaking method is desirable because a uniform sheet can be obtained.

[Matrix resin sheet]
The matrix resin sheet can be formed in the form of a film, woven fabric, or non-woven fabric. The non-woven matrix resin sheet is easier to escape from the internal air during heat and pressure molding than the film matrix resin sheet, the molding time is short, and there are voids inside the fiber reinforced resin molding. There is an advantage that it is difficult. The matrix resin sheet in the form of a nonwoven fabric can be formed in the form of a woven fabric or a nonwoven fabric by any method after spinning the matrix resin into fibers. In particular, a method in which matrix fibers are dispersed in water and then made into a sheet, that is, a wet papermaking method is desirable because a uniform sheet can be obtained.

  The fiber length of the matrix resin fiber is not particularly limited, but is preferably about 3 mm to 30 mm when manufactured by a wet or dry nonwoven fabric method. When longer than this, a fiber will not disperse | distribute uniformly but the uniformity of a sheet | seat and the uniformity of a mixing ratio with a reinforced fiber will fall. On the other hand, if the length is shorter than this, the strength of the web decreases, and breakage or the like is likely to occur in the stampable sheet manufacturing process. The fiber diameter and fiber length may be single, or those having different fiber diameters and fiber lengths may be blended and used. When manufacturing a matrix resin sheet as a woven fabric, there is no restriction | limiting in the length of a fiber.

[Reinforced fiber-matrix resin fiber mixed sheet]
Reinforcing fiber and matrix resin may be individually made into a sheet, laminated, and heated and pressed to form a fiber-reinforced resin molded body. However, a sheet in which reinforcing fiber and matrix fiber are mixed is formed and heated and pressed. A fiber-reinforced resin molded body may be used. In particular, a method in which a cut reinforcing fiber and a cut matrix fiber are dispersed and mixed in water and then made into a sheet, that is, a wet paper making method is desirable because a uniform sheet can be obtained. Thus, in the method of forming a sheet in which reinforcing fibers and matrix resin fibers are mixed and heat-press molding to form a fiber-reinforced resin molded body, in the nonwoven fabric sheet in which reinforcing fibers and matrix resin fibers are mixed Since it is desirable that the matrix resin fibers and the reinforcing fibers are uniformly mixed, it is preferable that the fiber diameters of the reinforcing fibers and the matrix resin fibers are approximate. From this viewpoint, the fiber diameter of the matrix resin fiber is preferably 4 times or less, more preferably 3 times or less, the fiber diameter of the reinforcing fiber blended in the nonwoven fabric sheet, Most preferably, the fiber diameters of the reinforcing fibers are equal or substantially equal.

[Molding method]
A method for producing a fiber-reinforced plastic molded body from the reinforcing fiber and the matrix resin is not particularly limited. When reinforcing fibers and matrix resin are respectively or mixed to form a sheet, it is easy to laminate the sheets and heat and press to form a fiber-reinforced plastic molding. Heating and pressing methods include a method in which a sheet is heated and pressure-bonded by a heating and pressing roll, a method in which a sheet is heated and pressed after being set in a mold, a method in which a preheated sheet is pressure-molded, and a partial heating with a laser or a heater. A method of laminating while applying can be applied.

  In the fiber-reinforced plastic body of the present invention, if the content of the reinforcing fiber is too small, the reinforcing effect of the molded plastic body by the reinforcing fiber becomes insufficient, and conversely, even if it is too much, the matrix resin cannot be filled between the fibers. Since voids are generated, the strength of the molded plastic body decreases. The ratio of the reinforcing fiber and the matrix resin in the fiber-reinforced plastic body is preferably 5/95 to 70/30, more preferably 20/80 to 60/40, in volume ratio.

  In the fiber-reinforced plastic body of the present invention, the orientation of the reinforcing fibers may be random, or may be oriented in a specific direction.

[Aluminum sheet with roughening layer]
The aluminum sheet having a roughened layer used in the present invention is obtained by roughening at least one surface of an aluminum sheet by chemical treatment. When the matrix resin penetrates and integrates into the roughened aluminum sheet surface, a strong adhesive force can be obtained. When another member is bonded to the fiber reinforced plastic molded body to which the aluminum sheet is bonded, it is preferable to use an aluminum sheet having both surfaces roughened. What is necessary is just to select the thickness of an aluminum sheet according to a use, Although it does not specifically limit, About 10 micrometers-2 mm are suitable.

  The aluminum sheet having a roughened layer used in the present invention is obtained by roughening the surface of an aluminum sheet (including an aluminum alloy sheet) by chemical treatment. As a method for roughening the surface of an aluminum sheet or the like, oxidation such as mechanical methods such as polishing, sandblasting, embossing, electrochemical methods such as anodization, etching with a chemical solution, etching, and the like are known.

  Since the super engineering plastic resin which is a matrix resin of the fiber-reinforced plastic body of the present invention has a high melt viscosity, it has low wettability and permeability to the aluminum surface during thermocompression bonding. Therefore, the selection of the roughened aluminum layer is important. According to the study by the inventors, the mechanical method only has fine scratches on the surface, and even if the resin penetrates, a sufficient anchoring (throwing) effect cannot be obtained, and the surface itself is also made of an aluminum material. As it was, the adhesiveness with the resin was insufficient. Anodic oxidation, so-called alumite treatment, has fine pores on the surface and is oxidized, so the adhesion is better than mechanical treatment, but super engineering plastic resin with high viscosity is hard to penetrate inside the fine pores and adheres The power was not enough. On the other hand, it has been found that an aluminum sheet roughened by a method of immersing in a chemical solution has very good adhesion to a fiber reinforced plastic body using a super engineering plastic resin as a matrix resin.

  As a method for roughening by dipping in a chemical chemical solution, methods described in JP-A Nos. 2001-348684 and 2011-195949 can be applied. In particular, a method of forming the film by contact (impregnation, coating, etc.) with an aqueous solution containing inorganic acid, iron ion, manganese ion, and copper ion is preferable. Alternatively, a method of forming by treatment (impregnation, coating, etc.) with an alkaline aqueous solution containing amphoteric metal ions, thio compound ions and nitrate ions is also suitable. The thickness of the roughened layer can be controlled by the chemical temperature and the immersion time. According to the study by the present inventor, the thickness of the roughened layer is very important for the adhesive strength, and when the thickness of the roughened layer is 2 μm or more, the super engineering plastic resin which is a matrix resin of the fiber reinforced plastic body can completely penetrate. However, if a peeling force is applied, breakage occurs inside the roughened layer where the resin has not penetrated, and the peeling occurs. On the other hand, if the thickness of the roughened layer is 0.1 μm or less, the penetration thickness of the resin is too thin to obtain a sufficient anchoring effect. Therefore, the thickness of the roughened layer is preferably about 1 μm. The thickness of the roughened layer can be measured with a cross-sectional electron micrograph.

The pressure bonding between the aluminum sheet having the roughened layer and the fiber reinforced plastic body is not particularly limited as long as the pressure is higher than the temperature at which the matrix resin in the fiber reinforced plastic body is softened. It is possible to carry out by the means.
The crimping of the aluminum sheet having the roughened layer and the fiber reinforced plastic body may be performed on the surface of the fiber reinforced plastic body once molded, or simultaneously with the heating and pressurization when the fiber reinforced plastic body is molded. You may go. In particular, a method in which an aluminum sheet having a roughened layer is placed in a mold during heating and pressurizing when a fiber reinforced plastic body is molded, and the aluminum sheet is fixed to the surface simultaneously with the molding of the fiber reinforced plastic body. Is efficient because it is not necessary to apply a release agent to the mold.

  EXAMPLES Hereinafter, although this invention is demonstrated based on the Example for confirming the effect of this invention, this invention is not limited by these. In each production example, “part” and “%” represent “part by mass” and “% by mass” unless otherwise specified.

<Example 1>
50 parts of PAN-based carbon fiber having a fiber diameter of 7 μm and a fiber length of 12 mm, 50 parts of PEI fiber having a fiber diameter of 15 μm (manufactured by Fiber Innovation Technology, fiber length of 12 mm), modified PET (melting point: 110 ° C.) in the sheath part, and in the core part 5 parts of core-sheath binder fiber (Kuraray N-720) using PET fiber was put into water. The amount of water was 200 times the weight of the input fibers (fiber slurry concentration 0.5%).
To this slurry, “Emanon 3199” (trade name, Kao Co., Ltd.) as a dispersant was added to 1 part by mass with respect to 100 parts by mass of the fiber and stirred to obtain a fiber slurry in which the fibers were uniformly dispersed in water. Prepared.
A wet web was formed from the fiber slurry by a wet papermaking method, and was heated and dried at 180 ° C. to prepare a nonwoven fabric having a basis weight of 150 g / m ² with a binder amount shown in Table 1.
After laminating 20 sheets of this nonwoven fabric, it was cooled under heat and pressure at a pressure of 10 MPa and a temperature of 280 ° C. to produce a carbon fiber reinforced composite plate having a thickness of 2 mm.
A surface roughening solution (30% by mass of sulfuric acid, 5% by mass of iron (III) chloride, 1% by mass of copper hydroxide, 1.5% by mass of manganese chloride tetrahydrate) was applied, followed by washing with water and 1 μm A 100 μm thick aluminum sheet provided with a surface roughening layer was produced. The above-described carbon fiber reinforced composite plate having a thickness of 2 mm and a 100 μm thick aluminum sheet provided with a 1 μm surface roughened layer are stacked so that the surface roughened surface is in contact with the carbon fiber reinforced composite plate, and the pressure is 10 MPa and the temperature is 280 ° C. The carbon fiber reinforced composite board which crimped | bonded and attached the aluminum sheet to the surface was produced.

<Example 2>
In place of the surface roughening treatment liquid used in Example 1, a surface roughening treatment liquid (aqueous solution of 10% by weight of sodium hydroxide, 5% by weight of zinc chloride, 5% by weight of sodium nitrate, and 14% by weight of sodium thiosulfate) was used. A carbon fiber reinforced composite plate having an aluminum sheet attached thereto was prepared in the same manner as in Example 1 except that an aluminum sheet provided with a 1 μm roughened surface was prepared and used.

<Comparative Example 1>
A carbon fiber reinforced composite having an aluminum sheet attached to the surface in the same manner as in Example 1 except that an aluminum sheet in which the thickness of the surface roughened layer of the surface roughened aluminum sheet used in Example 1 was changed to 2 μm was used. A plate was made.

<Comparative example 2>
Instead of the surface roughened aluminum sheet used in Example 1, a 100 μm-thick aluminum sheet (manufactured by Marujo Alumite Co., Ltd.) having an alumite layer provided on the surface by anodization was used in the same manner as in Example 1. A carbon fiber reinforced composite plate with an aluminum sheet attached to the surface was prepared.

<Comparative Example 3>
A carbon fiber reinforced composite plate having an aluminum sheet attached thereto was prepared in the same manner as in Example 1 except that an untreated aluminum sheet was used instead of the surface-roughened aluminum sheet used in Example 1.

  Each stampable sheet obtained by the method of Example 1 and Comparative Examples 1 and 2 is cut into a plate having a width of 20 mm, and the adhesive strength of the aluminum sheet is measured by a 90-degree peeling method in accordance with JIS K7074. (Peeling speed 10 mm / min). The measured adhesive strength is shown in Table 1.

The surface of the fiber reinforced plastic molding made of reinforced fiber and matrix resin is thermocompression-bonded with an aluminum sheet whose surface in contact with the fiber reinforced plastic is chemically roughened with a thickness of less than 2 μm. It was possible to realize a fiber-reinforced resin molded body that was firmly bonded and excellent in strength, heat resistance, and flame retardancy.

A lightweight, fiber-reinforced resin molded article having excellent strength, heat resistance, and flame retardancy with an aluminum sheet firmly bonded to the surface according to the present invention is an aircraft material, a railway vehicle interior material, a household appliance casing, a computer casing, and furniture. Can be used for etc.

Claims (6)

An aluminum-coated fiber-reinforced plastic molded body in which an aluminum sheet is bonded to at least one surface of a fiber-reinforced plastic molded body composed of a reinforced fiber and a matrix resin, and at least a surface of the aluminum sheet that contacts the fiber-reinforced plastic is chemically roughened. are of a thickness of roughened layer is Ri der less than 2 [mu] m, the matrix resin component is primarily a limiting oxygen index of 25 or more, the flame燃耐heat super engineering plastic resins der softening temperature is 200 ° C. or higher An aluminum-coated fiber-reinforced plastic molding characterized by the above. The aluminum-coated fiber-reinforced plastic molding according to claim 1 , wherein the matrix resin is a polyetherimide resin . An aluminum-coated fiber-reinforced plastic molded body in which an aluminum sheet is bonded to at least one surface of a fiber-reinforced plastic molded body composed of a reinforced fiber and a matrix resin, and at least a surface of the aluminum sheet that contacts the fiber-reinforced plastic is chemically roughened. A method for producing an aluminum-coated fiber-reinforced plastic molded body characterized in that the roughened layer has a thickness of less than 2 μm, the fiber-reinforced plastic molded body portion comprising a reinforcing fiber sheet and a matrix resin the fibers are laminated with a matrix resin fiber nonwoven mat produced by a wet paper making, characteristics and be a luer aluminum production process of the coated fiber-reinforced plastic molded body that was fabricated by the heat compression molding. The fiber-reinforced plastic molded parts, aluminum coated fibers according to claim 3, characterized in that the mixing nonwoven mat of reinforcing fibers and a matrix resin textiles produced by a wet paper making those prepared by heat compression molding Manufacturing method of reinforced plastic molding . 5. The aluminum-coated fiber according to claim 3, wherein the matrix resin component is a flame-retardant heat-resistant super engineering plastic resin mainly having a limiting oxygen index of 25 or more and a softening temperature of 200 ° C. or more. Manufacturing method of reinforced plastic molding.   The method for producing an aluminum-coated fiber-reinforced plastic molded body according to any one of claims 3 to 5, wherein the matrix resin is a polyetherimide resin.