JPH11254602A - Manufacture of frp decorative material having mirror characteristics and frp decorative material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an FRP decorative material excellent in mirror characteristics on the surface. SOLUTION: First, an FRP molding material M such as an SMC, a BMC or the like and decorative sheet S or the like for composing a decorative layer are integrally molded, etc., and an FRP molded body integrated the FRP molded resin and the decorative layer is prepared as a base B. An uncured ionizing radiation-curing resin 1 is applied on the base surface, and a resin film 2 such as polyester film or the like having a permeability to ionizing radiation and mirror characteristics is placed thereon. Next, ionizing radiation is irradiated, and the ionizing radiation-curing resin is cured, which forms a cured layer 3. Thereafter, the resin film 2 is peeled and removed, and a mirror surface of the surface of the resin film is imparted to the surface of the cured layer 3 so that the cured layer is a mirror layer 4. Thereby an FRP decorative material D can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an FRP (fiber reinforced plastic) decorative material used for interior materials of bathroom wall materials, household equipment such as a vanity stand, and a decorative material obtained thereby. In particular, the present invention relates to a manufacturing method capable of obtaining a decorative material having excellent surface mirror finish, and a decorative material thereof.

[0002]

2. Description of the Related Art Conventionally, FRP (fiber reinforced plastic) decorative materials whose surfaces have been decorated have been used for various purposes such as bathroom wall materials. For example, in a method of manufacturing a bathtub disclosed in Japanese Patent Application Laid-Open No. 53-134568, first, SMC (sheet molding compound) or B
After manufacturing an FRP molded body by pressure molding using MC (bulk molding compound), a fibrous base material (decoration sheet) such as paper, cloth, nonwoven fabric, etc., on which a pattern or pattern is printed, is formed on the surface of the FRP molded body. ), And apply a transparent synthetic resin liquid such as polyester, epoxy, urethane, etc. by spray coating from above, and let the resin liquid adapt to the decorative sheet using rollers, etc. Is cured to form a synthetic resin layer as a surface layer. In addition, as disclosed in Japanese Patent Application Laid-Open No. 8-17447,
There is also a method in which a decorative sheet made of fibrous material is inserted into a mold by pressure molding using MC or BMC and then molded, so that the decorative sheet is integrated with the FRP molded article at the same time as molding. In addition, by using a resin sheet having a mirror surface for the decorative sheet and using a mold having a mirror surface for the molding die, the surface of the decorative sheet having the mirror surface can be reduced to F.
There is also a method of utilizing the surface as an RP molded body.

[0003]

However, none of the above-mentioned conventional methods has provided excellent mirror finish. That is, in the method in which the surface layer is formed by a coating method such as spray coating or flow coating as described above, it is basically difficult to obtain a mirror surface as a property of the coating method itself. That is, when the fluidity of the coating material is increased, smoothing by leveling of the uneven surface such as a brush mark and a spray droplet mark on the coating film surface at the time of coating can be expected to some extent, but it is not perfect, and F
When the RP surface is uneven, the coating material flows into the concave portion from the convex portion, causing a disadvantage that the thickness of the coating film becomes uneven. In addition, when the fluidity of the paint is reduced, the non-uniformity of the coating due to the FRP surface unevenness can be improved, but this time, the unevenness of the coating surface at the time of coating does not level, and the smoothness of the coating is reduced. become worse. In addition, in the method of integrating the fibrous decorative sheet simultaneously with the molding of the FRP molded body, the fiber texture of the decorative sheet comes to the surface, so that the mirror surface cannot be obtained. In addition, it cannot express a sense of design with depth. Moreover, the wear resistance is poor. In addition, even with the method using a mirror-like decorative sheet, there is a problem that the glass fibers in the SMC or BMC affect the surface through the decorative sheet to the surface due to the heat and pressure at the time of integral molding, and the expected mirror surface is not finished. . In addition, the higher the thermoplastic resin sheet having moldability, the lower the scratch resistance of the sheet, so that the surface of the FRP molded article necessarily has low scratch resistance.

[0004]

Therefore, in order to solve the above-mentioned problems, the method for producing a mirror-finished FRP decorative material of the present invention comprises the following steps (A) to (C).
(A) An uncured ionizing radiation-curable resin is applied to the surface of a base material of an FRP molded body in which an FRP molding resin and a decorative layer are integrated, and the surface of the base material is further applied with ionizing radiation transparency and a mirror surface. Superposing resin films having properties.
(B) a step of irradiating with ionizing radiation and curing the ionizing radiation-curable resin to form a cured layer; (C) a step of peeling off the resin film and applying a mirror surface of the surface of the resin film to a surface of a cured layer of the ionizing radiation-curable resin to make the cured layer a mirror surface layer. As a result, an excellent specularity can be imparted to the surface of the FRP decorative material. Further, in the production method of the present invention,
The decorative layer of the FRP molded body is made of a decorative sheet obtained by decorating any one of titanium paper, nonwoven fabric and woven fabric.
A molded body is used. As a result, a decorative material having good adhesion between the decorative layer and the FRP molding resin can be obtained.

[0005]

Embodiments of the present invention will be described below with reference to the drawings.

First, FIG. 1 shows an FR having a mirror surface according to the present invention.
It is a conceptual diagram which illustrates the manufacturing method of P decorative material conceptually.
FIGS. 1A and 1B are diagrams illustrating a method of manufacturing an FRP molded body to be used. FIG. 1 shows an example of a conventionally known pressure molding. As shown in FIG. 1 (A), an FRP molding material M such as SMC and a decorative sheet S are placed on the molding die 11a, and then the molding die 11a and the molding die 11b are formed as shown in FIG. 1 (B). The decorative sheet S is used as a decorative layer when the
The base material B is obtained as an FRP molded body integrated with the P molding resin.

[0007] The FRP molded body to be used usually has a structure in which a decorative layer is the outermost layer and a layer (FRP molded resin layer) made of FRP molded resin is located below the decorative layer.
A layer made of a material such as a resin other than FRP may be laminated on the lower side (back side) of the P molded resin layer. Similarly, a transparent resin layer containing or not containing a reinforcing fiber may be further laminated on the decoration layer, and the decoration layer may be an internal layer. For the decorative sheet, a sheet obtained by decorating a fibrous base material sheet such as titanium paper, non-woven fabric, woven fabric or the like by printing or the like is used after being impregnated with resin or impregnated with resin. In the case of using a fibrous base material sheet, the resin impregnated sheet has a resin penetrating between the fibrous materials, or a resin non-impregnated sheet has a resin penetrating between the fibers (FRP molding resin or ionizing radiation curable resin). Strong adhesion is obtained.

Then, as shown in FIG. 1C, an uncured ionizing radiation-curable resin 1 is applied to the surface of the substrate B. Although the rightward arrow in the drawing indicates the substrate transport direction, it is needless to say that coating and various operations may be performed while the substrate is fixed.
Next, as shown in FIG. 1 (D), a resin film 2 made of a polyester resin or the like having an ionizing radiation transmitting property and a mirror surface property is applied to (a layer of) the uncured ionizing radiation curable resin 1 applied on the base material B. Overlaid. As shown in the drawing, it is preferable to use a roller 12 or the like as appropriate so that air does not enter between them. When only one surface of the resin film 2 is specular, it goes without saying that the specular side is directed to the resin 1 side. Next, as shown in FIG. 1E, the uncured ionizing radiation-curable resin 1
Is irradiated with an ionizing radiation such as an ultraviolet ray or an electron beam emitted from the ionizing radiation irradiating device 13 to cure the ionizing radiation-curable resin to form a cured layer 3. Then, when the resin film 2 is peeled off as shown in FIG. 2F, the mirror surface of the resin film is given to the surface of the cured layer 3 of the ionizing radiation curable resin. Thus, the FRP decorative material D having the desired mirror finish can be obtained.

FIG. 2 is a cross-sectional view of one embodiment of the FRP decorative material having a mirror surface obtained as described above. As shown in the figure, the FRP decorative material D is composed of an FRP molding resin 5 and a decorative layer 6.
The mirror surface layer 4 made of an ionizing radiation curable resin is laminated on the surface of the FRP molded body B made of In addition,
Here, as the FRP decorative material D, particularly, the mirror surface layer 4 and the FRP
It is preferred that the difference in the coefficient of thermal expansion of the molding resin 5 be within ± 20%, since warpage and cracks will not occur.

[Decorative layer, decorative sheet] FRP as a base material
In the molded article, the decorative layer to be integrated with the FRP molding resin may be hand-painted or the like, but is typically formed by a decorative sheet that has been subjected to decorative processing by forming a pattern by printing or the like. The decorative sheets include a laminate type and a transfer type. In the case of the laminate type, the decorative sheet itself serves as a decorative layer, and in the case of the transfer type, the transferred transfer layer serves as a decorative layer.

The laminated type decorative sheet is not particularly limited as long as it has a design effect such as a pattern and can be integrated with the FRP molding resin, and may be a conventionally known sheet. FIG. 3 is a cross-sectional view showing one embodiment of the decorative sheet S1 of the laminated type. The laminated decorative sheet S1 shown in FIG. 3 has a configuration in which a pattern layer 22 formed by printing or the like is laminated on a base sheet 21. Of course, as long as the base sheet itself has a decorative effect due to kneading of the pigment, the base sheet alone may be used as the decorative sheet. As the base sheet in the lamination type, for example, a sheet made of fibrous material such as paper such as titanium paper, nonwoven fabric, and woven fabric is used. The basis weight of the fibrous base sheet is usually about 50 to 200 g / m ² . The fiber material of the nonwoven fabric or woven fabric is not only synthetic resin fibers such as polyester but also inorganic fibers such as glass. The picture layer is formed by a conventionally known method and material such as gravure printing and silk screen printing. The pattern is arbitrary such as a marble pattern, a granite pattern, a tile pattern, a brick pattern, a grain pattern, a cloth pattern, a geometric pattern, and a solid pattern. The printing ink of the picture layer is a binder resin, a cellulose resin such as nitrocellulose, a polyester resin, an acrylic resin, a vehicle using a urethane resin, a coloring agent such as a pigment or a dye,
An ink to which other additives are added is used. In the laminated type decorative sheet, for example, when the base sheet is made of a fibrous base sheet such as titanium paper, nonwoven fabric, and woven fabric,
Further, there is a method of using as a resin-impregnated sheet impregnated with a resin. In the case of using a fibrous base material sheet, the resin impregnated sheet has a resin penetrating between the fibrous materials, or a resin non-impregnated sheet has a resin penetrating between the fibers (FRP molding resin or ionizing radiation-curable resin), thereby strengthening the decoration layer. The above-mentioned fibrous base material sheet is preferable because it provides good adhesion. As the resin to be impregnated, for example, a resin of the same system as the resin of the FRP molding material to be integrated is preferable in terms of adhesion.
In addition, when a curable resin is used as the impregnated resin, it is preferable that the resin be integrally molded with the FRP molding resin in a state before complete curing, since stronger adhesion can be obtained.

The transfer type decorative sheet is not particularly limited as long as the transfer layer can be integrated with the FRP molding resin, similarly to the laminate type, and may be a conventionally known sheet. FIG. 4 is a cross-sectional view showing one embodiment of a transfer type decorative sheet S2.
The transfer type decorative sheet S2 shown in FIG.
1, a pattern layer 32 is laminated via a release layer 33. The pattern layer 32 and the release layer 33 become transfer layers.
The picture layer 32 shown in the figure is composed of a pattern layer 32a and a solid layer 33b thereon. Releasable support is a resin film of polyethylene terephthalate, polypropylene, polyvinyl chloride or the like, or a silicone resin or a melamine resin, a film having a release layer formed with wax or the like,
In addition, release paper or the like is used. The picture layer is formed by printing or the like with the same ink as the laminated type. As a part of the transfer layer, a release layer or the like is appropriately provided. The release layer is provided for the purpose of improving the releasability and transferability with respect to the releasable support or the release layer thereon, as well as for improving the adhesion to the mirror surface layer, and uses a resin or the like listed in the picture layer. Note that an adhesive layer may be further provided on the picture layer in order to improve the adhesion between the picture layer and the FRP molding resin. The adhesive layer is formed of a polyester resin, an acrylic resin, an epoxy resin, a polyurethane resin, or the like. The transfer is
After molding the FRP molding material into an FRP molded body, the FRP molded body may be transferred to the FRP molded body, or a decorative sheet may be laminated at the same time as the FRP molded body is molded, and the mold release support may be peeled off after molding. May be transferred.

[FRP Molding Material] As the FRP molding material, a conventionally known material may be used, and if an FRP molded body is obtained by pressure molding, SMC, BMC and the like can be typically used. Needless to say, the molding of the molded body may be performed by a conventional hand lay-up method, but pressure molding using SMC or BMC is preferable in that it does not require a skilled operation and has good productivity. As the resin of the FRP molding material, typically, there is an unsaturated polyester resin (including a vinyl ester resin), but other resins such as (curable) acrylic resin,
So-called thermosetting resins such as an epoxy resin, a diallyl phthalate resin, a melamine resin, and a urethane resin can also be used.
The fiber as the reinforcing material is typically glass fiber, but inorganic fiber such as carbon fiber and potassium titanate fiber, or synthetic resin fiber such as polyester fiber and nylon fiber is also used. In addition, the FRP molding material, as necessary, fillers such as silica, alumina and calcium carbonate, coloring agents such as pigments and dyes, curing catalysts, stabilizers, plasticizers, lubricants, thermoplastic resins and the like were added. Use something. Further, in order to make the thermal expansion coefficient close to that of the ionizing radiation-curable resin of the mirror surface layer, adjustment is performed by adjusting the type and the number of functional groups of the thermosetting resin, and the amount of the filler or the thermoplastic resin to be mixed. In the case of SMC using unsaturated polyester resin and glass fiber, FRP
The thermal expansion coefficient of the FRP molding resin in the molded product is usually about 3.2 × 10 ⁻⁵ / ° C.

[Ionizing Radiation Curable Resin] The (uncured) ionizing radiation curable resin used as the mirror surface layer can impart strong surface physical properties such as abrasion resistance to the surface of the FRP decorative material. Excellent mirror finish can be imparted to the surface. Such an ionizing radiation-curable resin is a composition curable by ionizing radiation, and specifically, a prepolymer having a polymerizable unsaturated bond or a cationically polymerizable functional group in a molecule (a so-called oligomer). And / or a monomer that is appropriately mixed and curable by ionizing radiation. These prepolymers or monomers are used alone or as a mixture of two or more.

The above prepolymer or monomer specifically has a radical polymerizable unsaturated group such as a (meth) acryloyl group and a (meth) acryloyloxy group, a cationic polymerizable functional group such as an epoxy group in the molecule. Consisting of a compound having Further, a polyene / thiol prepolymer based on a combination of polyene and polythiol is also preferably used. In addition, for example, a (meth) acryloyl group is
It means an acryloyl group or a methacryloyl group. Examples of the prepolymer having a radical polymerizable unsaturated group include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate, and silicone (meth) acrylate. Etc. can be used. A molecular weight of about 250 to 100,000 is usually used.

Examples of the monomer having a radically polymerizable unsaturated group include monofunctional monomers such as methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and phenoxyethyl (meth) in the case of a (meth) acrylate compound. Acrylate and the like. Further, among the polyfunctional monomers, diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethylpropane tri (meth) acrylate,
There are trimethylolpropane ethylene oxide tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate and the like. Examples of prepolymers having a cationically polymerizable functional group include prepolymers of epoxy resins such as bisphenol epoxy resins and novolak epoxy compounds, and vinyl ether resins such as fatty acid vinyl ethers and aromatic vinyl ethers. Examples of the thiol include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate. Also, as a polyene,
For example, there is a polyurethane obtained by adding allyl alcohol to both ends of a polyurethane made of a diol and a diisocyanate.

When curing with ultraviolet light or visible light, a photopolymerization initiator is added to the ionizing radiation-curable resin.
In the case of a resin system having a radical polymerizable unsaturated group, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ethers can be used alone or in combination as a photopolymerization initiator. In the case of a resin system having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, an aromatic iodonium salt, a metallocene compound, a benzoinsulfonic acid ester, or the like is used alone or as a mixture as a photopolymerization initiator. be able to. The addition amount of these photopolymerization initiators is about 0.1 to 10 parts by weight based on 100 parts by weight of the ionizing radiation-curable resin.

If necessary, various additives may be added to the ionizing radiation-curable resin. As additives,
For example, vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, acrylic resin, thermoplastic resin such as cellulose resin, extender pigment (filler) composed of fine powder such as calcium carbonate, barium sulfate, silica, alumina, etc., dye And a coloring agent such as a pigment, or an antibacterial agent such as zeolite powder carrying silver ions. Further, in order to make the thermal expansion coefficient close to that of the FRP molding resin, adjustment of the blending ratio of the polyfunctional monomer or the prepolymer or the blending amount of the filler or the thermoplastic resin is performed.

As the ionizing radiation, an electromagnetic wave or a charged particle having energy capable of crosslinking the molecules in the adhesive is used. Usually, ultraviolet rays (U
V) or electron beam (EB), in addition to visible light,
X-rays, ion beams and the like can be used. As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light, and a metal halide lamp is used. The wavelength of ultraviolet light is usually 19
The wavelength range from 0 to 380 nm is mainly used. As the electron beam source, various types of electron beam accelerators such as Cockcroft-Walton type, Van degraft type, resonance transformer type, insulating core transformer type, or linear type, dynamitron type, high frequency type, etc. are used, preferably 100 to 1000 keV, preferably. Is 100
A device that irradiates electrons having an energy of about 300 keV is used.

The ionizing radiation-curable resin having the composition described above is usually used as a liquid coating solution at room temperature (at room temperature or at an appropriately heated coating temperature) without a solvent, and is used as a conventional coating solution such as a flow coat. By a known coating method, the FRP molded body is coated on the surface on which the mirror surface layer is to be formed. The thickness of the coating is adjusted depending on the application, the smoothness of the surface on which the FRP molded body is formed, and the like.

[Resin Film with Mirror Surface] This is a film for shaping and imparting mirror surface to the surface of the mirror surface layer by transfer, and the resin film only needs to have mirror surface on at least one surface. Such a resin film has a specularity of 1 at a center line average roughness Ra of ₇₅ according to JIS-B0601.
When a film having a thickness of not more than μm is used, a highly specular design can be provided, and preferable results can be obtained. As the resin used for the resin film, polyethylene terephthalate, polybutylene terephthalate, ethylene terephthalate isophthalate copolymer, thermoplastic polyester resin such as polyethylene naphthalate, polyethylene, polypropylene,
Examples include polymethylpentene, polyolefins such as olefin-based thermoplastic elastomers, nylon, and vinyl chloride resins. The resin film preferably has a strength that does not adversely affect the mirror surface due to wrinkles or the like, and it is desirable to use a biaxially stretched film. The thickness is preferably 10 to 20
0 μm, more preferably 50-100 μm. If the film is thin, the film is not flexible and easily breakable, and good mirror-like properties cannot be obtained. If the film is thick, the cost is high, and the shape following ability when the FRP molded body has an uneven surface deteriorates. When the film is peeled, if the releasability from the cured layer of the ionizing radiation-curable resin is insufficient, in order to improve the releasability of the surface, a release layer is formed on the surface with a silicone resin, wax, or the like. May be.

[Use of FRP Cosmetic Material] F having a mirror surface
The RP decorative material is used as a decorative panel, a decorative member, or the like, for an interior material such as a bathroom wall material, a bathtub, a bathroom vanity, or other household equipment. In addition, if it is an application that can make use of its mirror surface, it can be used for building interior materials such as wall materials, ceiling materials, floor materials, etc.
It can be used for various fields such as furniture, home appliance cabinets, vehicle interior materials such as automobiles, trains, aircraft, ships, etc., window frames, door frames, handrails, doors and other fittings, containers and the like. In addition, since the shape of the decorative material is such that a resin film is used for imparting the specularity, at least the surface imparting the specularity is preferably a flat surface or a quadratic curved surface. The overall shape of the makeup material may be a three-dimensional shape (for example, see FIG. 1F).

[0023]

Next, the present invention will be described in more detail by way of examples.

Example 1 As shown in FIG. 3, as a laminate type decorative sheet S1, a binder ink composed of a nitrocellulose resin was used, and the basis weight was 100 g / m ^2.
A sheet in which a gravure printing was performed on a base material sheet 21 made of titanium paper described above to form a marble-marble stone pattern pattern layer 22 was prepared. This decorative sheet is converted into an unsaturated polyester resin and glass fiber as an FRP molding material.
Overlaid with MC, press-formed at 140 ° C under 70 kgf / cm ² for 5 minutes, and FRP
An FRP molded body having a shape as shown in FIG. 1 in which a decorative sheet was integrated as a decorative layer on the surface of the molding resin was obtained. Then, FRP
A trifunctional urethane acrylate prepolymer, a dipentaerythritol hexaacrylate monomer, and 1
An uncured liquid of an ultraviolet curable resin comprising a photopolymerization initiator comprising -hydroxycyclohexyl phenyl ketone,
A 200 μm thick film is applied by a flow coating method, and a 100 μm-thick biaxially stretched polyethylene terephthalate resin film having a specular gloss having a center line average roughness Ra ₇₅ of 0.1 μm is further laminated thereon using a metal roller. Was. Thereafter, ultraviolet light is irradiated under two ultra-high pressure mercury lamps of 160 W / cm at a transport speed of 10 m / min and through a resin film of an FRP molded body on which the resin film is laminated to cure the ultraviolet curable resin, thereby curing the cured layer. After that, the polyethylene terephthalate resin film was peeled off, and the surface of the cured layer was given a mirror surface to form a mirror surface layer, thereby obtaining a FRP decorative material having a mirror surface. The obtained FRP decorative material is steel wool # 0
It has a strong surface with abrasion resistance enough that scratches are not conspicuous even after one reciprocation at 000, and the center line average roughness Ra ₇₅ of the surface is 0.1 μm specularity and high design, It was an excellent bathroom wall material.

Example 2 First, an FRP molded body having the shape as shown in FIG. 1 was obtained by press-molding with an SMC in the same manner as in Example 1 using only an FRP molding material without using a decorative sheet. Was. Next, using a transfer type decorative sheet S2 having a configuration as shown in FIG. 4, a decorative layer was transferred and formed on the surface of the FRP molded body by a transfer roller composed of a heated rubber roller. For the release support 31, a sheet obtained by laminating polypropylene by melt extrusion coating as a release layer on high quality paper,
On this sheet, a release layer 33 and a pattern layer 32 of a granite stone pattern composed of a pattern layer 32a and an all solid layer 32b were formed by gravure printing. In addition, an ink consisting of a binder having a composition obtained by adding a thermoplastic polyester to a mixed resin system of a 1: 1 weight ratio of a vinyl chloride-vinyl acetate copolymer and an acrylic resin is used for the release layer and the pattern layer serving as decorative layers. Using. Thereafter, in the same manner as in Example 1, a mirror surface layer is formed on the surface of the FRP molded body on the decorative layer side, and the FRP having the mirror surface property is formed.
A cosmetic material was obtained. The obtained FRP decorative material had a strong surface with abrasion resistance and the like, and was highly designed due to its mirror surface, and was excellent as a bathroom wall material.

[0026]

According to the method for producing a FRP decorative material having a mirror surface according to the present invention, it is excellent in the mirror surface and the phenomenon that the shape of the glass fiber in the Yuzu skin and the glass eyes (the shape of the glass fiber in the FRP appears as irregularities on the FRP surface). ) Can be applied to a FRP decorative material with a high mirror surface design without appearance defects. Also, as an FRP molded body,
If a molded article having a decorative layer formed of a decorative sheet obtained by decorating a fibrous sheet such as titanium paper, nonwoven fabric, or woven fabric, a decorative material having good adhesion between the decorative layer and the FRP molding resin can be obtained.

Further, according to the FRP decorative material having a mirror surface of the present invention, it is possible to obtain a decorative material having not only a strong surface but also excellent mirror surface, and also excellent scratch resistance.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram conceptually illustrating a method for producing a FRP decorative material having a mirror surface according to the present invention.

FIG. 2 is a cross-sectional view showing one embodiment of an obtained FRP decorative material having a mirror surface.

FIG. 3 is a cross-sectional view showing an example of a laminate sheet as a decorative sheet that can be used for forming a decorative layer.

FIG. 4 is a cross-sectional view showing an example of a transfer sheet as a decorative sheet that can be used for forming a decorative layer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Uncured ionizing radiation curable resin 2 Resin film 3 Cured layer 4 Mirror surface layer 5 FRP molding resin 6 Decorative layer 11a, 11b Mold 12 Roller 13 Ionizing radiation irradiation device 21 Base sheet 22 Picture layer 31 Releasable support 32 pattern layer 32a pattern layer 33b solid layer 33 release layer B base material M FRP molding material S decorative sheet

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29K 105: 06 B29L 9:00

Claims (2)

[Claims] 1. A mirror-finished FR comprising the following steps:
Manufacturing method of P decorative material. (A) An uncured ionizing radiation-curable resin is applied to the surface of a base material of an FRP molded body in which an FRP molding resin and a decorative layer are integrated, and the surface of the base material is further applied with ionizing radiation transparency and a mirror surface. Superposing resin films having properties. (B) a step of irradiating with ionizing radiation and curing the ionizing radiation-curable resin to form a cured layer; (C) a step of peeling off the resin film and applying a mirror surface of the surface of the resin film to a surface of a cured layer of the ionizing radiation-curable resin to make the cured layer a mirror surface layer. 2. The method according to claim 1, wherein the decorative layer of the FRP molded body is a decorative sheet obtained by decorating any one of titanium paper, nonwoven fabric and woven fabric.