JP2002355909A - Resin molded object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin molded object allowing irregular reflection on a cross section to disappear without coating the cross section and having good design effect. SOLUTION: In the resin molded object, a transparent layer 1 comprising an acrylic resin having light transmissivity is formed on the surface thereof and a decorative layer 2 having no light transmissivity is formed to the back surface of the transparent layer and a backup layer 3 comprising glass fiber reinforced plastic or a thermosetting resin is further formed on the back surface of the decorative layer. The corner part 5 on the side of the transparent layer 1 of the end part of the resin molded object is obliquely notched so that the thickness B after notching of the transparent layer 1 in the cross section 4 becomes 20% or less of the thickness A before notching of the transparent layer 1. By this constitution, irregular reflection light appearing in the vicinity of the cross section can be allowed to disappear.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded article having a surface layer formed of a transparent material such as acryl, and more particularly to a bathtub.

[0002]

2. Description of the Related Art Conventionally, a transparent layer having a light-transmitting property has been provided on the front side, a decorative layer having no light-transmitting property has been provided on the back side, and a fiber-reinforced plastic (FR) having no light-transmitting property has been provided on the back side.
A resin molded article having a laminated structure in which a backup layer made of P) or the like is overlapped is used for a bathtub. When manufacturing such a bathtub, first, an acrylic flat plate is formed into a bathtub shape by vacuum forming to form a transparent layer, then an opaque decorative layer is provided from the back side by spraying or painting, and finally FRP, A backing layer made of a thermosetting resin or the like is formed on the back surface to form a three-layer resin molded body.

[0003] In the resin molded article thus formed, the decorative layer on the back side can be seen through a transparent layer having a light transmitting property on the surface. Therefore, when the molded article is used as a bathtub, it has a unique depth of high quality. You can get the feeling.

In FIGS. 3 and 4, a resin molded body 110 is
It is composed of three layers: a transparent layer 101 having a light-transmitting property, a decorative layer 102 having no light-transmitting property, and a backup layer 103. Surface 104. Further, the corner 105 on the front side of the cut surface 104 is chamfered for safety.

[0005]

However, when looking at the vicinity of the cut surface 104 from the transparent layer 101 side, in the portion of the cut surface 104 of the transparent layer 101 made of acrylic resin,
Diffuse reflection of light occurs, and the light is whitish diffusely reflected light 10
6, which reduced the design of the molded article. In particular, when the resin molded body 110 is used as a bathtub, since the cut surface 104 corresponds to a boundary with the apron, the irregularly reflected light beam 106 becomes very conspicuous, which is a problem.

Therefore, a method of eliminating the irregularly reflected light beam 106 by painting the cut surface 104 of the transparent layer 101 with paint, gel coat, or the like can be considered.

When the cut surface 104 is painted with paint, gel coat, or the like for such a purpose, irregularly reflected light rays 106
Can be eliminated.

[0008] However, as shown in FIG. 5, when the resin molded body 110 is used as the bathtub 107,
7 has unevenness due to the thickness of the paint on the cut surface 108, and the joint surface with the apron 109 cannot be joined exactly. In addition, it is conceivable to apply an ink having a relatively thin coating film. However, when the resin molded body 110 is used as the bathtub 107, there is a problem of chemical resistance such as a bleaching agent and a bath material. Cannot be used as paint.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a resin molding excellent in design by eliminating irregularly reflected light from a cut surface without coating the cut surface.

[0010]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a resin molded product of the first invention has a first light-transmitting property at least on the surface side. In the resin molded body in which the layer is formed and the second layer having no light-transmitting property is formed on the back side, the corner of the end on the first layer side is a notch of the first layer on the cut surface. It is notched diagonally so that the thickness after the cut is 20% or less of the thickness before the cut.

In the resin molded article according to the second invention, a first layer made of an acrylic resin having a light-transmitting property is formed on the surface side, and the second layer is formed on the back side of the first layer. In a resin molded body in which a layer is formed and a third layer made of glass fiber reinforced plastic or thermosetting resin is further formed on the back side, a corner portion of the end portion on the first layer side is a third portion in the cut surface. The first layer is notched diagonally so that the thickness after the notch is 20% or less of the thickness before the notch.

According to the test results of the inventors, these second
In the resin molded articles of the inventions of the first and second aspects, the corners on the first layer side of the ends are cut off obliquely so that the irregularly reflected light rays on the cut surface are eliminated without painting the cut surface. Can be done. For this reason, a resin molded article having good appearance and excellent design properties is obtained.

When the resin molded body is a bathtub, when installed in the bathroom, the bathtub has a clean appearance without any discomfort at the boundary with the apron.

If the notched surface at the end of the resin molded body is polished, the design of the surface side of the resin molded body is further improved.

[0015]

Embodiments of the present invention will be described below. First, in order to obtain the resin molded body of this embodiment, first, FIG.
An acrylic flat plate is formed into a bathtub shape by vacuum forming to form a transparent layer 1 as a first layer, and then an opaque decorative layer 2 as a second layer is formed on the back surface of the transparent layer 1 as shown in FIG. Then, the backup layer 3 as a third layer made of FRP, thermosetting resin, or the like is formed on the back side by press molding. Next, it is cut perpendicular to the layer structure to obtain a resin molded body 10 having three layers. Reference numeral 4 denotes a cut surface of the resin molded body 10.

As described above, in the resin molded body 10 having three layers, the corner 5 on the side of the transparent layer 1 at the end is largely notched at an angle of about 45 degrees. As the size of the notch, the thickness B of the transparent layer 1 after the notch on the cut surface is determined by the thickness of the transparent layer 1 before the notch.
It is preferred that the notch is not more than 20% of the thickness A of the metal. Since the cutout surface 11 formed by cutting out the corner portion 5 of the resin molded body 10 is largely exposed to the surface side of the resin molded body 10, the cutout surface 11 is polished to smooth the surface. The notch surface 11 is finished using sandpaper of two or more types of roughness, and is further buffed as a final finish. By doing so, the surface can be further provided with smoothness.

In the resin molded body 10 obtained as described above, the thickness B of the transparent layer 1 after the notch in the cut surface is obtained.
However, the thickness is 20% or less of the thickness A of the transparent layer 1 before the notch. As described above, by sufficiently reducing the thickness of the transparent layer 1 at the cut surface, when the resin molded body 10 is viewed from the transparent layer 1 side as shown in FIG. The irregularly reflected light due to the irregular reflection of the light that has appeared on the cut surface 4 at the end of the end can be almost eliminated. The decorative pattern of the decorative layer 2 on the back side of the transparent layer 1 is
Can be recognized well. Since the notch provided on the cut surface 4 has the purpose of eliminating the irregularly reflected light, the notch may be provided at an angle and a size other than those in the present embodiment.

The resin molded article of the present invention can be used not only for bathtubs but also for toilet seats, toilet lids, counters and the like.

[0019]

The resin molded article of the present invention is capable of eliminating irregularly reflected light from the cut surface without coating the cut surface, since the corner of the end of the molded product is largely cut off. It has become excellent. When this resin molded body is used as a bathtub, the bathtub has a clean appearance without any discomfort at the boundary with the apron. In addition, by polishing the notched surface, the surface of the resin molded body can be made more attractive.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view near a cut surface of a resin molded body according to an embodiment of the present invention.

FIG. 2 is a cross-sectional perspective view of the vicinity of a cut surface of the resin molded product according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a vicinity of a cut surface of a conventional resin molded body.

FIG. 4 is a cross-sectional perspective view near a cut surface of a conventional resin molded body.

FIG. 5 is a cross-sectional view of the vicinity of a bathtub end when a conventional resin molded body is used as a bathtub.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Transparent layer (1st layer) 2 ... Decorative layer (2nd layer) 3 ... Backup layer (3rd layer) 4 ... Cut surface 5 ... Corner part 10 ... Resin molding 11 ... Notch surface A ... Thickness of transparent layer on cut surface before notch B… thickness of transparent layer on cut surface after notch

Claims (4)

[Claims] 1. A first light-transmitting first material at least on a surface side.
In the resin molded body in which the second layer having no light-transmitting property is formed on the back side, the corner of the first layer side of the end portion is formed by cutting the first layer on the cut surface. A resin molded product characterized by being cut off obliquely so that the thickness after the cut is 20% or less of the thickness before the cut. 2. A first layer made of an acrylic resin having a light-transmitting property is formed on the front side, and a decorated second layer having no light-transmitting property is formed on the back side thereof. Thirdly made of glass fiber reinforced plastic or thermosetting resin
In the resin molded body in which the layer of the first layer is formed, the corner of the end portion on the first layer side is not more than 20% of the thickness before the notch of the first layer on the cut surface before the notch. A resin molded body characterized in that it is cut off at an angle. 3. The resin molded article according to claim 1, which is a bathtub. 4. The resin molded product according to claim 1, wherein the cut-out surface of the end is polished.