JPH0532071A - Decorating film for in-mold automatic decoration - Google Patents

Abstract

PURPOSE:To obtain a decorating film for in-mold automatic decoration which can be effectively softened by heating at a low temperature for short time. CONSTITUTION:A polybutyleneterephthalate film of 38mum thickness is used as a base film 1, and a pattern layer 2 consisting of polyurethane resin is provided locally thereon. Then, an adhesive layer 5 in which carbon black of 2mum particle size has been dispersed in acrylic resin as a heat absorbing agent by a rate of 40% is formed thereon to obtain a decorating film for in-mold automatic decoration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative film for simultaneous forming and painting which can be efficiently softened by heating at low temperature for a short time.

[0002]

2. Description of the Related Art Conventionally, a method for producing a molded product with simultaneous painting uses a decorative film in which a pattern layer and an adhesive layer are formed on a transparent base film, and the entire circumference of the decorative film is covered by one mold party. It is clamped and fixed to the ring surface, then a heater is placed near the fixed decorative film to heat and soften the decorative film, and preforming is performed along the inner surface of the mold by vacuum and / or air pressure means. After that, the mold was closed and the molten resin was injected from the other mold side to decorate the surface of the molded product.

[0003]

However, since the conventional decorative film has a low heat ray absorption rate, it is difficult to be softened, and the method for producing the simultaneously painted article requires time and high temperature for heating the decorative film. An object of the present invention is to solve the above problems and to provide a decorative film for simultaneous painting with molding, which can be efficiently softened by heating at low temperature for a short time.

[0004]

In order to achieve the above-mentioned object, the decorative film for simultaneous painting with molding of the present invention has a pattern layer and an adhesive layer formed on a transparent base film, of which at least one layer is formed. The heat ray absorbent having a high heat ray absorption rate is configured to be dispersed.

The decorative film for simultaneous painting with molding of the present invention is
A pattern layer and an adhesive layer are formed on a transparent base film,
A resin layer in which a heat ray absorbent having a high heat ray absorption rate is dispersed is provided on at least one of the front and rear of the pattern layer.

The decorative film for simultaneous painting with molding of the present invention is
A pattern layer and an adhesive layer are formed on a transparent base film,
A heat ray absorbent having a high heat ray absorption coefficient was dispersed in at least one layer, and a resin layer in which a heat ray absorbing agent having a high heat ray absorption coefficient was dispersed was provided in at least one of before and after the pattern layer.

In each of the above constitutions, copper oxide, manganese dioxide, cobalt oxide, chromium oxide, iron oxide, lead sulfide,
Semiconductor particles selected from nickel sulfide are used as a heat ray absorber.

In each of the above constitutions, a black pigment selected from carbon black, acetylene black and graphite is used as a heat ray absorbent.

The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of the decorative film for simultaneous molding and painting of the present invention. 2 and 3 are sectional views showing other embodiments of the decorative film for simultaneous painting with molding of the present invention. Reference numeral 1 is a base film, 2 is a design layer, 3 is an adhesive layer, and 6 is a resin layer in which a heat ray absorbent is dispersed.

The base film 1 is a base film of ordinary decorative decorative film for simultaneous painting such as polybutylene terephthalate film, acrylonitrile butadiene styrene film, acrylic film, polyethylene terephthalate film, polypropylene film, polyethylene film, nylon film, cellophane film. The one used as 1 is used.

A pattern layer 2 and an adhesive layer 3 are formed on the base film 1. As the pattern layer 2, a thermoplastic resin such as vinyl chloride / vinyl acetate copolymer / polyamide / polyester / polyacrylic / polyurethane / polyvinyl acetal / polyester urethane / chlorinated rubber is used as a binder, and a dye or pigment of an appropriate color is used as a coloring material. What is contained as is used. The pattern layer 3 is formed by a normal printing method such as a gravure printing method or a screen printing method or a roll coater method.

The adhesive layer 3 needs to be appropriately modified in design depending on the type of injection resin. For example, the injection resin may be polystyrene / acrylonitrile styrene resin / acrylonitrile butadiene styrene copolymer resin / methyl methacrylate resin / noryl / polycarbonate. In such cases, a binder such as acrylic resin, styrene resin, polyamide, etc. may be used. When the injection resin is polyethylene or polypropylene, a binder such as chlorinated polyolefin, chlorinated ethylene vinyl acetate copolymer resin, cyclized rubber or coumarone indene resin can be used. In addition, corresponding to other various injection resin materials,
Saturated polyester resin, nitrified cotton, etc. can also be used. As a method of forming the adhesive layer 3, a gravure printing method,
There are a normal printing method such as a screen printing method and a roll coater method.

A heat ray absorbent having a high heat ray absorption rate is dispersed in at least one of the pattern layer 2 and the adhesive layer 3 as described above. As the heat ray absorbent having a high heat ray absorption rate, semiconductor particles selected from copper oxide, manganese dioxide, cobalt oxide, chromium oxide, iron oxide, lead sulfide and nickel sulfide may be used. Further, a black pigment selected from carbon black, acetylene black and graphite may be used.

Further, instead of dispersing the heat ray absorbing agent in the pattern layer 2 and / or the adhesive layer 3, or by dispersing the heat ray absorbing agent in the pattern layer 2 and / or the adhesive layer 3, the heat ray absorbing agent having a high heat ray absorption rate is absorbed. Resin layer 6 in which the agent is dispersed
May be provided on at least one of the front and back of the pattern layer.
As the resin in which the heat ray absorbent is dispersed, it is preferable to use a polyolefin resin, an acrylic resin, a vinyl resin, or a silicone resin. Further, the resin layer 6 in which the heat ray absorbent is dispersed may be formed only in a portion that needs to be preformed into a complicated shape. As a method of forming the resin layer 6 in which the heat ray absorbent is dispersed, there are a usual printing method such as a gravure printing method and a screen printing method, and a roll coater method.

Further, since the resin binder has a high heat ray emissivity, the radiation characteristics can be improved by controlling the particle size of the heat ray absorbent and reducing the former by the ratio of the resin binder and the heat ray absorbent.

[0016]

【Example】

Example 1 A polybutylene terephthalate film having a thickness of 38 μm was used as a base film 1, and a pattern layer 2 made of a polyurethane resin and a red pigment was partially provided on the base film 1, and further, a carbon layer having a particle size of 2 μm was formed in an acrylic resin. Black 4
An adhesive layer 5 dispersed as a heat ray absorbent at a rate of 0% was formed to produce a decorative film for simultaneous painting with molding (see FIG. 1).

The decorative film for simultaneous painting with molding thus obtained could be efficiently softened by heating at low temperature for a short time.

Example 2 A polybutylene terephthalate film having a thickness of 38 μm was used as a base film 1, and a pattern layer 2 made of an acrylic vinyl resin and a yellow pigment was partially provided on the base film 1, and a particle size of 2 μm in a vinyl resin. After partially forming a resin layer 6 in which copper oxide was dispersed as a heat ray absorbent in a proportion of 40%, an adhesive layer 3 made of an acrylic resin was formed to produce a decorative film for simultaneous molding (FIG. 2). reference).

The decorative film for simultaneous painting with molding thus obtained could be efficiently softened by heating at low temperature for a short time.

Example 3 A pattern layer made of iron oxide having a particle size of 2 μm and a yellow pigment dispersed on a base film 1 of an acrylic film having a thickness of 70 μm as a heat ray absorbent in a proportion of 20% in an acrylic resin. 4 is partially provided, and further a resin layer 6 in which iron oxide having a particle size of 2 μm is dispersed as a heat ray absorbent in an acrylic resin at a ratio of 40% is formed thereon, and then an adhesive layer made of an acrylic resin is formed. 3 was formed to produce a decorative film for simultaneous painting with molding (see FIG. 3).

The thus obtained decorative film for simultaneous painting with molding could be efficiently softened by heating at low temperature for a short time.

[0022]

EFFECTS OF THE INVENTION In the decorative film for simultaneous molding and forming of the present invention, a pattern layer and an adhesive layer are formed on a transparent base film, and a heat ray absorbent having a high heat ray absorption coefficient is dispersed in at least one layer of them. Configured.

The decorative film for simultaneous molding and painting of the present invention comprises:
A pattern layer and an adhesive layer are formed on a transparent base film,
A resin layer in which a heat ray absorbent having a high heat ray absorption rate is dispersed is provided on at least one of the front and rear of the pattern layer.

The decorative film for simultaneous molding and painting of the present invention is
A pattern layer and an adhesive layer are formed on a transparent base film,
A heat ray absorbent having a high heat ray absorption coefficient was dispersed in at least one layer, and a resin layer in which a heat ray absorbing agent having a high heat ray absorption coefficient was dispersed was provided on at least one of the front and rear of the pattern layer.

In each of the above constitutions, copper oxide, manganese dioxide, cobalt oxide, chromium oxide, iron oxide, lead sulfide,
Semiconductor particles selected from nickel sulfide are used as a heat ray absorber.

In each of the above constitutions, a black pigment selected from carbon black, acetylene black and graphite is used as a heat ray absorbent.

Therefore, since the resin layer in which the heat ray absorbent having a high heat ray absorption rate is dispersed is provided on the transparent base film, the decorative film can be efficiently softened by heating at low temperature for a short time. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the decorative film for simultaneous painting with molding of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the decorative film for simultaneous painting with molding of the present invention.

FIG. 3 is a cross-sectional view showing another embodiment of the decorative film for simultaneous painting with molding of the present invention.

[Explanation of symbols]

1 base film 2 pattern layers 3 adhesive layer 4 Design layer in which heat ray absorbent is dispersed 5 Adhesive layer in which heat ray absorbent is dispersed 6 Resin layer in which heat ray absorbent is dispersed

Claims (5)

[Claims] 1. A decorative film for simultaneous painting with molding, characterized in that a pattern layer and an adhesive layer are formed on a transparent base film, and a heat ray absorbent having a high heat ray absorption rate is dispersed in at least one layer of them. 2. A pattern layer and an adhesive layer are formed on a transparent base film, and a resin layer in which a heat ray absorbent having a high heat ray absorption coefficient is dispersed is provided on at least one of the front and rear sides of the pattern layer. A featured decorative film for simultaneous painting. 3. A pattern layer and an adhesive layer are formed on a transparent base film, and a heat ray absorbent having a high heat ray absorption coefficient is dispersed in at least one layer of the pattern layer and the adhesive layer. A decorative film for simultaneous painting with molding, comprising a resin layer in which a high heat ray absorbent is dispersed. 4. The molding according to claim 1, wherein the heat ray absorbent is semiconductor particles selected from copper oxide, manganese dioxide, cobalt oxide, chromium oxide, iron oxide, lead sulfide and nickel sulfide. A decorative film for simultaneous painting. 5. The decorative film for simultaneous painting with molding according to claim 1, wherein the heat ray absorbent is a black pigment selected from carbon black, acetylene black and graphite.