JPH02303824A - Patterned molded body having laminated structure - Google Patents

Abstract

PURPOSE:To facilitate patterning and to increase strength by successively laminating a gel coat layer composed of a transparent resin containing a colored mica powder, a reinforcing layer composed of fiber reinforced plastic having transparency, a casting layer composed of a transparent resin and a reinforcing layer composed of fiber reinforced plastic from the surface. CONSTITUTION:A surface gel coat layer 2 is composed of a transparent resin containing a colored mica powder 1 and said mica powder is homogeneously dispersed in a gel coat resin. Because of a laminated structure wherein reinforcing layers 3, 5 each composed of fiber reinforced plastic are provided on both sides of a casting layer 4 composed of a transparent resin, mechanical strength such as tensile strength or bending strength is very high. By providing the reinforcing layer 5 composed of the fiber reinforced plastic having transparency and the casting layer 4 composed of the transparent resin behind the gel coat layer 2, a molded product composed of a high-grade laminated structure having depth can be realized. A pattern having design effect is realized according to the color or shape of the colored mica powder.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a molded body having a laminated structure that can be used as a material for bathtubs, bathroom wall materials, countertops, waterproof pans, and the like.

BACKGROUND OF THE INVENTION Conventionally, fiber-reinforced plastics using unsaturated polyester resins have been used for bathtubs, ships, tanks, and the like. These have been used simply to increase mechanical strength, but various laminated structures using fiber-reinforced plastics are being considered in order to create designs that suit aesthetics and various other purposes. A laminated structure has been invented that uses transparent resin concrete hardened with saturated polyester resin to prevent warping of molded bodies and cranking at corners (Japanese Patent Publication No. 60-49426).

On the other hand, an FRP molded product (Japanese Unexamined Patent Publication No. 55-81149) has been devised, in which a resin layer containing fine mica foil treated with titanium oxide is laminated and bonded to an FRP layer.

Problems to be Solved by the Invention In the above configuration, when a filler is added to the gel coat layer on the surface, the size of the gel coat layer is considerably limited when the thickness of the gel coat layer on the surface is thin and the filler is granular. Furthermore, when an inorganic substance or metal of a certain size that is not in powder form is added as a filler for the purpose of adding patterns, etc., the filler is not uniformly dispersed in the gel coat resin and settles, resulting in non-uniformity. was there. On the other hand, if the weight of the filler is reduced too much, there is a problem in that it floats on the gel coat resin. Furthermore, a molded product that is cured by mixing a particulate material as a filler into a gel coat resin has a low mechanical strength such as a tensile strength of 9 and a bending strength, and is likely to cause peeling or swelling. In terms of design, the challenge was to add patterns and the like without compromising the aesthetic appearance. When a resin layer containing fine mica foil treated with titanium oxide is laminated and bonded to an FRP layer, there is a problem that the molded product is flat and lacks depth, and lacks a luxurious feel.

The present invention is intended to solve the above-mentioned conventional problems, and aims to make it easy to apply various patterns and increase strength.

Means for Solving the Problems The present invention provides, from the surface, a gel coat layer made of a transparent resin containing colored mica powder, a reinforcing layer made of a transparent fiber-reinforced plastic, a cast layer made of a transparent resin, and a fiber-reinforced layer. The molded body was made by sequentially laminating reinforcing layers made of plastic.

By making the gel coat layer on the working surface a gel coat layer made of a transparent resin containing colored mica powder, a large-sized filler can be added even though the gel coat i is thin. Furthermore, since the colored mica powder is scaly and has a large bulk density, it is uniformly dispersed in the gel coat resin and does not settle or float, resulting in non-uniformity.

Furthermore, the colored mica powder in the gel coat layer does not cause peeling or swelling. This is because mica is scale-like, has strong heat resistance, is soft in hardness, and is flexible.

Furthermore, since it has a laminated structure with reinforcing layers made of fiber-reinforced plastic on both sides of the transparent casting layer, mechanical strength such as tensile strength 2 bending strength is extremely high.

By adding various colored mica powders to the gel coat layer made of transparent resin on the surface, it is possible to add any pattern or the like. By providing a reinforcing layer made of transparent fiber-reinforced plastic and a casting layer made of transparent resin behind the gel coat layer, a molded product with a layered structure with a deeper and more luxurious feel can be realized. I can do it.

Example A partial cross-sectional view of a molded body having a laminated structure according to the present invention is shown in FIG. It has a structure in which a reinforcing layer (3) made of plastic, a cast FJ (4) made of transparent resin, and a back reinforcing layer (5) made of fiber-reinforced plastic are laminated in this order. Specific examples will be described below.

Example 1 A pearl pigment (rriodin 163 Shiner) in which fine mica powder was colored with titanium oxide was used as colored mica powder.
Mix 1 part (manufactured by Pearl Merck ■, average diameter 20-200 microns) and 100 parts of bisphenol-based transparent unsaturated polyester resin (gel coat resin) and apply to the mold with a spray gun to a thickness of 0.5-mm. did. After that, a reinforcing layer made of fiber-reinforced plastic with glass fiber non-woven fabric and a transparent unsaturated polyester resin layer was laminated by hand lay-up method (thickness 0.8 m) to create a surface layer, and a back layer. A reinforcing layer made of fiber-reinforced plastic made of iso-unsaturated polyester resin containing a large amount of white content and glass fiber was prepared on the back mold by hand lay-up method. A mixture of 100 parts by weight of transparent resin and the following ratio was injected between the surface layer and the back layer.

150 parts by weight of aluminum hydroxide 1 part by weight of transparent vinyl ester resin 100 parts by weight After mixing these, a curing agent and a curing accelerator were added, and the mixture was poured into a mold and cured to obtain a patterned molded article having a laminated structure.

The surface gel coat 7112 was made into a gel coat layer 2 made of a transparent resin containing colored mica powder 1, thereby homogeneously dispersing it in the gel coat resin. This is thought to be because the colored mica powder is scaly and has a large bulk density. In terms of design, as a result of consideration, it is preferable that the coloring mica powder is a Burl pigment made by coloring fine mica powder with titanium oxide, with a size of 20 microns or more in order to create depth, and the blending ratio is 100 weight of gel coat resin. 0.02 parts by weight or more and 2 parts by weight or less.

If it is less than 0.02 parts by weight, the effect of addition is small;
If it exceeds 1 part by weight, it becomes flat and lacks a three-dimensional effect.The appropriate amount depends on the color tone of the background, so the blending ratio may be selected within the above range.

When applied to structures such as bathtubs, the colored mica powder in the gel coat layer did not cause peeling or swelling in hot water resistance tests. This is because mica is scale-like, has strong heat resistance, and is soft (flexible) in terms of hardness.

Since the basic laminated structure is a laminated structure in which there is a reinforcing layer made of fiber reinforced plastic on both sides of a casting layer made of transparent resin, the mechanical strength such as tensile strength 1 bending strength is very high.

By providing a reinforcing layer made of transparent fiber-reinforced plastic and a casting layer made of transparent resin behind the gel coat layer, we were able to create a molded product with a deeper, higher-grade layered structure. It was possible to realize a decorative pattern by changing the color and shape of the zero-colored mica powder.

Example 2 Colored mica powder and isophthalic acid-based transparent unsaturated polyester resin (gel coat resin) were mixed in the following proportions.

Black colored mica powder 1 part by weight (average particle size 1 mm) Yellow colored mica powder 1 part by weight (average particle size 1 m) Brown colored mica powder 0.5 parts by weight (average particle size 1III+1) Gel coat resin 100 parts by weight It was applied to a thickness of 3 m. Thereafter, a reinforcing layer made of fiber-reinforced plastic containing a transparent unsaturated polyester resin and carrying a glass fiber non-woven fabric was laminated by a hand lay-up method to form a surface layer with a thickness of 1.0 AO). On the other hand, as a back layer, a reinforcing layer made of fiber-reinforced plastic made of iso-unsaturated polyester resin and glass fiber was prepared by a hand lay-up method. A mixture of 100 parts by weight of transparent resin and the following ratio was injected between the surface layer and the back layer.

Glass Flift 150 parts by weight Vinyl ester resin 100 parts by weight White toner 0.1 part by weight By adding scale-like colored mica powder to the gel coat resin layer, arbitrary patterns such as granite patterns can be created. It can be realized. Furthermore, as in this embodiment, it is also possible to add a small amount of toner to the cast layer made of transparent resin to add color to the extent that transparency is not lost. Separately,
Similarly, the reinforcing layer made of fiber-reinforced plastic containing transparent unsaturated polyester resin can also be slightly colored.

Example 3 Colored mica powder and isophthalic acid-based transparent unsaturated polyester resin (gel coat resin) were mixed in the following proportions.

Pearl Chest (lriodin153 Shims+er
0.03 parts by weight black colored mica powder 1 part by weight (average particle size 1m) yellow colored mica powder 1 part by weight (average particle size 1cm) 100 parts by weight gel coat resin It was applied with Thereafter, a reinforcing layer made of fiber-reinforced plastic containing a transparent unsaturated polyester resin and carrying a glass fiber non-woven fabric was laminated by a hand lay-up method (thickness: 1.0 m) to form a surface layer. On the other hand, as a back layer, a reinforcing layer made of fiber-reinforced plastic made of iso-unsaturated polyester resin and glass fiber was prepared by a hand lay-up method. A transparent resin mixed in the following ratio with respect to 100 parts by weight was injected between the surface layer and the back layer.

Aluminum hydroxide: 150 parts by weight Vinyl ester resin: 100 parts by weight By adding scale-like colored mica powder to the gel coat resin layer, any pattern such as a granite pattern can be realized.

Effects of the Invention As described above, in the present invention, by forming the gel coat layer on the surface into a gel coat layer made of transparent resin containing colored mica powder, it is possible to uniformly disperse the resin in the gel coat resin, and various designs are possible. Become.

Furthermore, since it has a laminated structure with reinforcing layers made of fiber reinforced plastic on both sides of the casting layer made of transparent resin,
The mechanical strength, such as tensile strength and bending strength, is very high, and when viewed from the surface, it is possible to realize a molded product with a layered structure that takes advantage of transparency and has a three-dimensional, deep, and very high-class feel.

[Brief explanation of drawings]

The figure is a partial cross section showing the laminated structure of a molded body in one embodiment of the present invention. 1... Colored mica powder, 2... Gel coat layer, 3... Reinforcement layer, 4... Casting layer,
5...Reinforcement layer. Name of agent: Patent attorney Shigetaka Awano One idiot!・-1 Color Kei-#-#KiZ--Gelcoat layer 3.5- Neki 1 4-...Nezumi layer

Claims (1)

[Claims] From the surface, a gel coat layer made of transparent resin containing colored mica powder, a reinforcing layer made of transparent fiber-reinforced plastic, a casting layer made of transparent resin, and a reinforcing layer made of fiber-reinforced plastic are sequentially laminated. A patterned molded body with a laminated structure.