JPH0871497A - Method for decorating resin formed article - Google Patents

Abstract

PURPOSE: To shorten the time of delivery of a decorated resin formed article, to eliminate the complicatedness in distinguishing between the decorated formed article and monochromatic formed article in production and storage and to facilitate the production and stock management. CONSTITUTION: The main body 14 of a formed article is preformed, then a base-coat layer 16 is formed on the surface, a decorating material of a different color is sprayed on the base-coat layer 16 surface in the form of droplets, the grains of the different-color decorating material are dispersed on the layer 16 to form a spotted-pattern layer 18, and then a light-transmissive overcoat layer 20 is laminated on the surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for decorating a resin molded product, and more particularly to a method for decorating a resin molded product suitable as a method for decorating a stone pattern.

[0002]

2. Description of the Related Art Conventionally, a method as shown in FIG. 3 has been used as a decorating method for forming a stone pattern on a waterproof pan in a resin molded product, for example, a sanitary room unit such as a bathroom unit.

The method (A) is a decoration method for molding a molded product by spray-up molding. In this method, a gel coat material containing actual crushed stone particles is sprayed on the surface of the molding die 100. Then, the gel coat layer 102 having a stone pattern is formed, and then a liquid resin material containing glass fibers is sprayed on the outer side of the gel coat layer 102 to form the FRP layer (molded product body) 104.

On the other hand, the method (B) is an example of molding a resin molded product by press molding. In this method, a non-woven fabric printed with a stone-tone pattern and a sheet-like FRP material are superposed. Then, press molding is performed with a pair of molding dies 106 and 108 to mold a resin molded product having the pattern layer 110 on the surface of the FRP layer 112.

[0005]

However, since these methods perform patterning together with the molding of the molded article body, from receiving an order at a production plant to producing and delivering a patterned resin molded article. In addition to the long period of time, it is necessary to distinguish between a decorative molded product and a single-color molded product for production and inventory at the time of production, inventory, etc., and there is a problem that production and inventory management are troublesome.

In addition, when the color is changed, a lot of work is required for the setup change, resulting in a lot of work loss, and the repeated coating with the unsaturated polyester resin (gel coat resin) as a decorating method requires gel time. However, there is a problem that molding is difficult because it affects the curing characteristics.

[0007]

The invention of the present application has been made to solve such a problem. Thus, the invention of the present application is to form a base coat layer on the surface of a main body of a molded article in advance, and at the same time, spray a different color decorating material on the surface of the base coat layer in a droplet shape to obtain a different color. The decoration particles are dispersed on the base coat to form a speckled pattern, and then a light-transmitting overcoat layer is laminated on the upper surface of the base coat (claim 1).

Another invention of the present application is characterized in that, in the decorating method according to claim 1, the base coat layer is composed of a uniform color and constitutes the background color of the spot pattern (claim 2).

Still another invention of the present application is to form the base coat layer, the speckle pattern layer, and the overcoat layer by spraying each of the constituent materials of the base coat layer, the speckle pattern layer, and the overcoat layer in a liquid state with air. Further, regarding the spotted pattern layer, the pattern material is sprayed in a granular form by lowering the air pressure to form a spotted pattern (claim 3).

Still another invention of the present application is characterized in that, in the decorating method according to claim 1, 2, or 3, the base coat layer is formed after sanding or degreasing the surface of the molded article body. (Claim 4).

[0011]

As described above, according to the invention of the present application, the molded article body is preformed, and then the base coat layer, the spot pattern layer and the overcoat layer are formed on the molded article body. According to the present invention, regardless of the molding method of the resin molded product, that is, regardless of press molding, hand lay-up or other molding methods, the same method is used for decoration. You can

In the present invention, since the decorated molded product can be produced by molding the molded product body in advance and performing decoration at the stage of receiving the order, it is possible to receive the order at the production factory or the like. The period from to production and delivery can be shortened. Further, since it is not necessary to distinguish between the decorative molded product and the single-color molded product at the time of production and inventory, there is an advantage that the production and inventory management are easy.

In the present invention, since the base coat layer is interposed between the mottled pattern layer and the molded article body, the mottled pattern layer is formed on the molded article body regardless of the material of the molded article body. It is possible to achieve good adhesion and to prevent the decorative layer from being turned over later.

Further, since the spot pattern layer is sandwiched between the base coat layer and the overcoat layer, it is possible to prevent the spot pattern material from being deteriorated with time or being physically peeled off during use, Moreover, the overcoat layer is a light-transmitting layer, and the speckle pattern layer is visible through the light-transmitting overcoat layer to the outside, so that there is an advantage that a deep pattern can be obtained.

According to a second aspect of the invention, the base color of the spot pattern is formed by the base coat layer. According to the present invention, a beautiful spot pattern can be formed and a stone pattern is produced. be able to.

According to the third aspect of the present invention, the base coat layer, the speckle pattern layer and the overcoat layer are formed by spraying the respective base coat material, speckle pattern material and overcoat material with air. A decorative pattern can be easily formed.

According to a fourth aspect of the invention, prior to forming the base coat layer on the molded article body, the surface thereof is subjected to sandpaper treatment or degreasing treatment. When sandpaper treatment or degreasing treatment is performed in this way, the adhesion of the base coat layer to the surface of the molded article body can be further increased, and the base coat layer, and by extension, the decorative layer is more than the surface of the molded article during repeated expansion and contraction by heat. It is possible to more reliably prevent partial or total peeling.

In the case of resin floor moldings such as waterproof floor pans and bath tubs in bathroom units, which are directly exposed to hot water, the above sandpaper treatment is preferably applied, while storage shelves, counters and other resin moldings which are not directly exposed to hot water. In this case, degreasing treatment is sufficient. Here, the degreasing treatment can be performed, for example, by wiping the surface of the resin molded product body with acetone or the like.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a decorative resin molded product that constitutes a waterproof pan 12 (see FIG. 2) of a bathroom unit, in which a base coat layer 16 and a speckled pattern layer 18 on the surface of the molded product body 14 are further formed. A decorative layer composed of the overcoat layer 20 formed on the surface is provided.

The molded product body 14 is a layer forming the body of the resin molded product, and various materials such as FRP, ABS, PS and PP can be used (however, in this example, FRP).

The base coat layer 16 is a layer made of a polyurethane material, the speckle pattern layer 18 is also a layer made of a polyurethane material, and the overcoat layer 20 is a layer made of a modified polyurethane material. That is, the base coat layer 16, the spot pattern layer 18, and the overcoat layer 20 which constitute the decorative layer.
Are composed of homogeneous materials.

The speckle pattern layer 18 is formed by applying liquids (two colors in this example) colored in different colors to the base coat layer 1 by air.
6 is sprayed onto the surface, at which time the air pressure is lowered to apply the liquid material in the form of large liquid droplets, and formed to form a three-tone stone-like spot pattern with the base coat layer 16 as the base color. ing.

The overcoat layer 20 serves as a protective layer for the speckle pattern layer 18, and the overcoat layer 20 has enhanced abrasion resistance and chemical resistance. The overcoat layer 20 has a light-transmitting property, and the overcoat layer 2
Through 0, the speckle pattern layer 18 can be seen through the surface.

In the decorative resin molded product 10 of this example, the surface of the molded product body 14 which has been molded in advance is subjected to sandpaper treatment (for example, a waterproof floor pan of a bathroom which is directly exposed to hot water,
In the case of a resin molded product such as a bathtub, the surface of the molded product main body 14 is roughened or degreased (in the case of a resin molded product such as a storage shelf or a counter which does not come into direct contact with hot water). Then, a liquid polyurethane material is then uniformly sprayed with air to form a base coat layer 16 having a predetermined thickness (for example, 30 μm or more).

Then, on the surface of the base coat layer 16,
Two colors of liquid polyurethane material colored differently from the base coat layer 16 are individually sprayed. At that time, a spotted pattern can be formed on the surface of the base coat layer 16 by reducing the air pressure and applying the polyurethane material in the form of large droplets.

Then, a liquid modified polyurethane material having a light-transmitting property is uniformly sprayed on the surface of the speckle pattern layer 18 so as to sufficiently cover the speckle pattern layer 18, and an overcoat layer 20 is laminated. The overcoat layer 20 has a thickness of 50 μm or more in the case of a resin molded product such as the above-mentioned waterproof floor pan or bathtub which is directly exposed to hot water, and is a resin molded product such as a storage shelf or a counter which is not directly exposed to hot water. For example, the thickness is preferably 30 μm or more.

Then, this is dried and cured at a temperature of 80 ° C. or higher for 40 minutes or longer. This makes it possible to obtain the resin molded product 10 decorated with a three-color stone-tone speckled pattern having the base coat layer 16 as a base color.

In the method of this embodiment, since the molded article body 14 is preformed after the decoration, the decoration can be performed by the same method regardless of the molding method.

The molded product body 14 is molded in advance,
Since it is only decorated later, it is possible to shorten the production and delivery period after receiving an order at a production plant. In addition, it is possible to eliminate the need to distinguish between a decorative molded product and a single-color molded product at the time of production and inventory, and there is an advantage that production and inventory management are easy.

Further, in this embodiment, since the base coat layer 16 is interposed between the speckle pattern layer 18 and the molded article body 14, the speckled pattern layer 18 is formed regardless of the material of the molded article body 14. 14, the surface of the molded article body 14 is sandpaper-treated or degreased, and then the base coat layer 1 is formed thereon.
Since 6 is formed, the adhesion between the base coat layer 16 and the molded article main body 14 is high, and therefore it is possible to prevent the decorative layer from being turned up later.

Further, the speckle pattern layer 18 is the base coat layer 16
Since it is sandwiched between the overcoat layer 20 and the overcoat layer 20, it is possible to prevent the speckle pattern material from being deteriorated with time or being physically peeled off during use. Further, since the overcoat layer 20 is a layer having a light-transmitting property, the speckle pattern layer 18 can be seen through the light-transmitting overcoat layer 20, and a deep pattern can be obtained.

Further, in this embodiment, the decorative layer can be formed only by changing the air pressure and spraying the base coat material, the spot pattern material, and the overcoat material, so that the patterning can be easily performed.

Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention is of course applicable to the storage rack 22 as shown in FIG. 2 and other resin molded products. The present invention can be implemented in a mode in which various changes are made without departing from the spirit of the invention.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts of a decorative resin molded product obtained by a method according to an embodiment of the present invention.

FIG. 2 is a view of the interior of a bathroom unit in which waterproof pans, storage shelves, and the like as resin molded products to which the method of the embodiment is applied are arranged.

FIG. 3 is a diagram showing an example of a conventional method for molding a decorative resin molded product.

[Explanation of symbols]

 10 Decorative Resin Molded Product 12 Molded Product Main Body 16 Base Coat Layer 18 Spot Pattern Layer 20 Overcoat Layer

Claims (4)

[Claims] 1. A molded article body is preliminarily molded, a base coat layer is formed on the surface of the molded article body, and a decorative material of a different color is spray-coated in droplets on the surface of the base coat layer to form a decorative material of a different color. Are dispersed on a base coat to form a speckled pattern, and then a translucent overcoat layer is laminated on the upper surface of the base coat to decorate the resin molded product. 2. The method for decorating a resin molded article according to claim 1, wherein the base coat layer has a uniform color and constitutes a base color of the spot pattern. 3. The base coat layer, the speckle pattern layer, and the overcoat layer are formed by spraying each of the constituent materials of the base coat layer, the speckle pattern layer, and the overcoat layer in liquid form with air, and the speckle pattern layer. The method for decorating a resin molded article is characterized in that the pattern material is sprayed in a granular form by reducing the air pressure to form a spot pattern. 4. The decoration method according to claim 1, wherein the base coat layer is formed after sanding or degreasing the surface of the molded article body. How to decorate.