JP2002079643A - Resin molded body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply form a color-divided pattern with good appearance in the color boundary region. SOLUTION: A bathtub 10 is constituted of an artificial marble 11 and a decorative layer 16 which is provided on a part of the surface side of this artificial marble 11 and through which the artificial marble 11 of the back surface side can be seen. The decorative layer 16 is formed with a decorative gel coat prepared by compounding a particulate and/or scale-like colored decorative material 19 in a light transmitting clear gel coat. The thickness of this decorative layer 16 gradually becomes larger from the boundary B of the surface side formed by the artificial marble 11 and the decorative layer 16 toward the upper site C in the figure 1 and see-through clarity to the artificial marble 11 is gradually decreased thereby toward the site C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded product, and more particularly, to a resin molded product capable of easily forming a color-coded pattern whose appearance is gradually changed.

[0002]

2. Description of the Related Art Conventionally, resin molded articles such as bathtubs and kitchen counters having a color-coded pattern formed on the surface thereof have been known. This resin molded body is formed by laminating a decorative layer in which different colors are exposed across a predetermined boundary on a molded product body made of FRP (glass fiber reinforced plastic) or the like. Specifically, first, a gel coat of a predetermined color for decorating the molded article main body is applied and cured while a predetermined area of the molded article main body is covered with a masking sheet. Then, the masking sheet is removed, and after the area where the gel coat has already been applied is covered with the masking sheet, another gel coat having a different color from the gel coat already applied to the molded article body is applied and cured, and Thereby, a color-coded pattern is formed on the surface side of the molded article main body.

[0003]

However, in the case of the resin molded body, in order to perform decoration having a color-coded pattern, a gel coat must be applied while alternately covering masking sheets on the molded article body. However, there is an inconvenience that it takes time and effort to decorate the surface. In particular, if an attempt is made to express a color boundary with a complicated curve or the like, the outer edge of the masking sheet must be a complicated curve or the like, which makes the operation extremely complicated. In addition, when the masking sheet is placed over each area and fixed, the outer edge of the masking sheet is displaced from a desired boundary, or when the masking sheet is removed, a clear boundary corresponding to the edge of the masking sheet is obtained. May not appear. That is, when an attempt is made to form a color-coded pattern by covering the masking sheet, unnatural scratches or the like may occur in a color boundary region, and the aesthetic appearance of the boundary region is likely to be impaired. Therefore, it is difficult for the resin molded body to have a complex shape with excellent aesthetics in the boundary region of colors, which causes a reduction in the yield of the resin molded body.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such inconveniences. The purpose of the present invention is to form a color-coded pattern having a good appearance in appearance by forming a blurred portion in a boundary area of colors. An object of the present invention is to provide a resin molded body that can be easily formed.

[0005]

In order to achieve the above object, the present invention provides a molded article main body having a decorative layer which allows the molded article main body to be seen through, and the decorative layer is provided on the molded article main body. Is formed so as to include a blur forming material that gradually changes the see-through clarity. According to such a configuration, the blurred portion that gradually shifts from the color of the molded article main body to the color of the blur forming material is formed by the decorative layer, and the boundary region between these colors is made natural, high-grade and deep. It can be finished in a complex color pattern. In addition, it is not necessary to strictly separate the materials at the boundaries of colors, so that a masking sheet is not attached, and a natural color-coding pattern in which the boundaries of colors gradually change can be easily formed. .

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, it is preferable to adopt a configuration in which the molded article main body is formed of artificial marble. This makes it possible to provide a novel decorative area in addition to the aesthetics of the artificial marble itself.

It is preferable that the blur forming material is formed of a granular and / or scale-like decorative material.

In the present specification, “color” means
It is used as a concept that includes not only chromatic and achromatic colors but also metallic colors and transparency. Further, “front” is used for the inner peripheral surface side of the bathtub shown in FIG. 1, that is, the surface side exposed when installed in the bathroom, while “back” is used for the outer peripheral surface side in FIG. That is, it is used on the side that is hidden when installed in a bathroom.

[0009]

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

FIG. 1 is a longitudinal sectional view showing an embodiment in which the resin molded article of the present invention is applied to a bathtub, and FIG.
2 is an enlarged view of a portion A in FIG. 1. In these figures, the bathtub 10 has a multilayer structure in which front and back gel coat layers 12 and 13 are coated on both sides of an artificial marble 11.

The artificial marble 11 is formed of an existing artificial marble material including a polyester resin or the like. Specifically, the artificial marble 11 has a bottom wall 11A and is inclined outward along the periphery of the bottom wall 11A. Side wall 11B standing upright
And a flange 11C connected to the upper end of the side wall 11B.
And a hanging portion 11D hanging down from the outer peripheral side of the flange portion 11C. Here, the side wall 11B
On the upper surface side, the upper surface side of the flange portion 11C, and the surface of the hanging portion 11D connected to the upper surface of the flange portion 11C, the decorative layer 16 through which the artificial marble in each region can be seen.
Is provided.

The decorative layer 16 is provided so that the surface thereof is substantially flush with the surface of the artificial marble 11 adjacent thereto. The decorative layer 16 is not particularly limited, but is made of a translucent material such as polyester resin. And a decorative gel coat in which a decorative material 19 as a granular and / or scale-like colored blur forming material is blended in a clear gel coat having the following. When the thickness of the clear gel coat is set to 0.25 mm, a magnetic spectrum hardness tester UV-2000 manufactured by Shimadzu Corporation and a wavelength of 4000 to 8 are used.
A material having an optical density measured at 000 K of 0.3 or less, preferably 0.15 or less, is used. The decorative material 19 has a diameter of 2 μm to 3000 μm.
Colored aluminum flakes, colored mica, colored resin films and the like having a diameter of about μm, preferably about 50 μm to 500 μm are used. The thickness of the decorative layer 16 gradually increases from the boundary B on the surface side formed by the decorative layer 16 and the artificial marble 11 toward the upper part C in FIG. 1. Reference numeral 16 denotes a portion where the see-through clarity for the artificial marble 11 on the back side is
In such a manner as to gradually decrease toward.
That is, in the vicinity of the boundary B, the decorative layer 16 is thin, and the texture including the color and the like of the artificial marble 11 on the back side is relatively clearly expressed. The artificial marble 11 gradually becomes thicker, and the sharpness of the artificial marble 11 gradually decreases, while the color of the decorative material 19 becomes conspicuous. For this reason, between the boundary B and the part C, the blurred part 22 which gradually changes from the color of the artificial marble 11 to the color of the decorative material 19 is formed. The blurring portion 22 is a boundary region of a color-coded pattern composed of the color of the artificial marble 11 and the color of the decorative material 19. In the present embodiment, the thickness of the decorative layer 16 is substantially uniform in a region above the portion C in FIG. 1, but the present invention is not limited to this.
The thickness of the decorative layer 16 may be further increased or decreased as the distance from the predetermined portion C increases.

The surface gel coat layer 12 is formed using a clear gel coat such as a polyester resin as a material, while the back surface gel coat layer 13 is formed using a colored gel coat such as a polyester resin having a hiding power.

Next, a manufacturing procedure of the bathtub 10 in this embodiment will be described with reference to FIG.

A clear gel coat is sprayed on the lower mold L of the bathtub which has been subjected to the release treatment so as to have a thickness of about 0.3 mm, and then cured at a temperature of 60 ° C. for 1 hour to form a surface gel coat layer 12. . Although the clear gel coat here is not particularly limited, U-250 clear gel coat (polyester) 2 manufactured by Kojin Chemical Co., Ltd.
100 parts by weight of a liquid type, 1 part by weight of Kayamec M, a curing agent manufactured by Kayaku Akzo, and 5 parts by weight of styrene are used. Then, the surface gel coat layer 12
The decorative gel coat obtained by adding 5 parts by weight of aluminum flakes as the decorative material 19 (see FIG. 2) to the clear gel coat made of the same material as the material used as the material for the surface gel coat layer 12 shown in FIG. About 200mm from the middle and bottom
0.2mm while gradually changing the thickness to the height of
Spray and cure to a thickness of That is, at the time of spraying the decorative gel coat, the decorative gel coat is sprayed so as to gradually increase the thickness of the decorative material 19 from the boundary B toward the portion C. In other portions, the decorative gel coat is sprayed uniformly so that the thickness of the decorative material 19 is substantially the same as that of the portion C. When the decorative gel coat is sprayed, the decorative gel coat may be sprayed so as to gradually increase the density of the decorative material 19 from the boundary B toward the portion C by adjusting the air pressure or the like.

On the other hand, the upper mold U of the bathtub subjected to the release processing
Has a white gel coat with a hiding power of about 0.3 mm
Sprayed with a thickness of 1 hour and cured at a temperature of 60 ° C for 1 hour,
A back gel coat layer 13 is formed.

After performing the above operations, the upper mold U and the lower mold L
And an artificial marble material is injected from a gate (not shown) into a molding space formed therebetween, and a temperature of 30 ° C.
After curing for 6 hours, the mold is removed, and secondary curing is performed at a temperature of 80 ° C. for 3 hours to obtain a bathtub 10 having a multilayer structure. Here, the artificial marble material is not particularly limited.
Parts by weight, 200 parts by weight of glass filler, 0.1 parts by weight of accelerator (cobalt nafurate), 0.5 parts by weight of Kayamec M, a hardener manufactured by Kayaku Akzo, and 3 parts by weight of colored toner pink What is blended in is used.

Therefore, according to such an embodiment, a color-coded pattern based on the color of the artificial marble 11 and the color of the decorative material 19 of the decorative layer 16 is formed on the surface of the bathtub 10. Moreover, between the boundary B of the decorative layer 16 and the portion C, the color of the artificial marble 11 naturally moves from the color of the artificial marble 11 to the color of the decorative material 19 in combination with the pattern of the artificial marble 11 on the back side that can be seen through. Since the blurred portion 22 that expresses a deep pattern is formed, an effect of improving the appearance in the color boundary region can be obtained. Further, in forming the blurred portion 22, there is no need to attach a masking sheet or the like, and an effect is obtained in that a color-coded pattern having an excellent aesthetic appearance of a color boundary region can be formed by simple means.

Further, since the decorative layer 16 is formed of a material using a clear gel coat, the artificial marble 11 on the back side of the decorative layer 16 can be seen through from the front side of the decorative layer 16, and the transparency of the artificial marble 11 can be improved. There is also an effect that the color can be changed without losing color.

Further, the color difference ΔE = 35 or less (preferably 20 μm) between the molded article body and the portion provided with the decorative layer in the molded article.
In the following, a blurred portion having a natural contrast can be formed. In this case, even when it is difficult to uniformly provide the decorative layer with a molded article having a complicated shape, the defect at the portion is not conspicuous and stable production can be performed.

[0021]

As described above, according to the present invention,
Since a decorative layer containing a blur forming material for gradually changing the visibility sharpness of the molded article body is provided while allowing the molded article body to be seen through, a natural, high-grade and deep A complicated color pattern can be easily formed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a bathtub in an embodiment.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a diagram showing the bathtub of FIG. 1 together with a molding die.

[Explanation of symbols]

10: bathtub (resin molded body), 11: artificial marble (molded product main body), 16: decorative layer, 19: decorative material (blur forming material)

Claims (3)

[Claims] 1. A molded article main body is provided with a decorative layer that allows the molded article main body to be seen through, and the decorative layer includes a blur forming material that gradually changes the visibility of the molded article main body. A resin molded article characterized by being formed. 2. The resin molded article according to claim 1, wherein said molded article main body is formed of artificial marble. 3. The resin molded article according to claim 1, wherein the blur forming material is configured to include a granular and / or scale-like decorative material.