JPH09192595A - Patterning of fiber reinforced plastic molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form patterns having depth on the surface of a glass fiber reinforced molded product by simple work. SOLUTION: First translucent gel coat prepared by mixing 5 pts.wt. of black color gel coat resin with 100 pts.wt. of a clear gel coat resin under stirring and second translucent gel coat prepared by mixing 0.4 pts.wt. of ivory pigment with 100 pts.wt. of the clear gel coat resin under stirring are sprayed on the surface of a mold at the same time by a multicolor sprayer in a ratio of 6:1. Thereafter, white color gel coat is sprayed on the sprayed uncured second translucent gel coat layer to cure the whole. Glass fiber reinforced plastic is laminated on the cured gel coat layer to be cured. When the cured glass fiber reinforced plastic is demolded, the white color gel coat layer 2 can be visually looked from two-color translucent gel coat layers 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for patterning a fiber-reinforced plastic molded product used for a house interior material, a house exterior material, a bathroom base material and the like.

[0002]

2. Description of the Related Art Fiber-reinforced plastic molded articles used for interior and exterior materials for houses or base materials for bathrooms can be improved in appearance by patterning the surface with coloring or the like. Is being done.

[0003] As a method of patterning a fiber-reinforced plastic molded product, a resin concrete method in which natural stone, aluminum flake, or the like is ground and mixed with a transparent resin,
There are known a method of interposing a fiber cloth or film provided with a pattern or printing between a transparent front resin layer and a rear resin layer, a method of attaching a cushion floor or the like to a plastic molded product, and the like.

[0004] However, these methods have a problem that a complicated operation is required when molding a molded product, so that the operation requires a long time and the operation efficiency is poor.

In the resin concrete method, the thickness of the resin must be increased in order to completely cover the crushed material such as natural stones, so that sinks and cracks are liable to occur, and the thickness is kept constant. There is also a problem that it is not easy to do.

Further, in the method of interposing a fiber cloth or film provided with a pattern or a print between the transparent front surface resin layer and the transparent back surface resin layer, the pattern becomes flat and a deep pattern is formed. I can't.

Japanese Unexamined Patent Publication No. 4-330956 discloses a method of spraying a clear gel coat and a colored gel coat onto a mold by a spray device for a multicolor pattern to form a stone-tone pattern. Also disclosed is a method of forming a pattern by spraying a clear gel coat on the surface of a mold in advance and then simultaneously spraying a plurality of colored gel coats of different colors.

[0008]

In the method of simultaneously spraying the clear gel coat and the colored gel coat onto the mold, when the ratio of the colored gel coat attached to the surface of the mold becomes larger than the ratio of the clear gel coat attached,
There is a problem that the clear gel coat does not appear on the surface of the molded product and the pattern formed is flat. Also, a method of spraying a colored gel coat of a plurality of colors after spraying the clear gel coat on the mold also makes the resulting pattern flat. In this case, when the clear gel coat is sprayed thickly, the clear gel coat may become whitish and cloudy.

The present invention solves such a problem, and an object thereof is to provide a patterning method for a fiber-reinforced plastic molded article which can form a deep pattern by a simple operation. It is in.

[0010]

The method of patterning a fiber-reinforced plastic molded article of the present invention comprises a step of simultaneously spraying a plurality of semi-transparent gel coats colored in different colors onto the surface of a molding die, and each semi-transparent gel coat. Is uncured,
It is characterized by including a step of spraying a colored gel coat on these translucent gel coats, and a step of laminating and curing a glass fiber reinforced resin after each translucent gel coat and the colored gel coat are cured. Therefore, the above object is achieved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

In the patterning method for glass fiber reinforced plastics of the present invention, first, the clear gel coat resin 100 is used.
5 parts by weight of a black colored gel coat is prepared with respect to parts by weight, and these are mixed and stirred. As a result, a first semi-transparent gel coat colored in black having a viscosity of 17 to 20 and a thixotropy of 4.0 or more is obtained.

Further, 0.4 parts by weight of an ivory pigment is prepared with respect to 100 parts by weight of the clear gel coat resin,
These are mixed and stirred. This results in a viscosity of 17-
20. A second semi-transparent gel coat colored with an ivory having a thixotropy of 4.0 or more is obtained.

Then, the first semi-transparent gel coat and the second semi-transparent gel coat are respectively applied by a multicolor spray device.
Spray simultaneously on the surface of the mold in a ratio of 6: 1.

When the work of spraying the first and second translucent gel coats onto the surface of the mold is completed, the sprayed uncured first translucent gel coat and the second translucent gel coat are colored white. Spray colored gel coat. And 3 sprayed on the surface of the mold
Cure the gel coat of the type.

When the three kinds of gel coats sprayed on the surface of the mold are cured, the fiber reinforced plastic in which the unsaturated polyester resin is impregnated in the glass mat is laminated on the cured gel coat to cure the glass fiber reinforced plastic. . When the glass fiber reinforced plastic hardens, the hardened glass fiber reinforced plastic is released from the mold.

As shown in FIG. 1, the demolded glass fiber reinforced plastic molded article is laminated on the glass fiber reinforced plastic layer 3 from the semitransparent two-color translucent gel coat layer 1 provided on the surface. Since the white colored gel coat layer 2 is visible, a stone-tone pattern similar to that of natural stone having a deep surface is formed.

[0018]

As described above, the method for patterning a glass fiber reinforced plastic molded article of the present invention is such that after the semitransparent gel coats colored in a plurality of colors are simultaneously sprayed onto the molding die, the semitransparent gel coats are formed. Since a colored gel coat is sprayed on the gel coat and these gel coats are cured and then glass fiber reinforced plastic is laminated and cured, a simple operation can obtain a deep pattern on the surface. You can

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a fiber-reinforced plastic molded product patterned by the method for patterning a glass fiber-reinforced plastic molded product of the present invention.

[Explanation of symbols]

 1 translucent gel coat layer 2 colored gel coat layer 3 glass fiber reinforced plastic layer

Claims (1)

[Claims] 1. A step of simultaneously spraying a plurality of semi-transparent gel coats colored in different colors onto the surface of a mold, and spraying a colored gel coat on these semi-transparent gel coats in an uncured state. A method of patterning a fiber-reinforced plastic molded article, comprising: a step of hardening each translucent gel coat and a colored gel coat, and then laminating and hardening a glass fiber reinforced resin.