JPH0834090A - Metal decorative panel and production thereof - Google Patents

Abstract

PURPOSE:To obtain a metal decorative panel good in bending processability and excellent in design effect by using a laminated sheet of an ethylene/vinyl alcohol copolymer film having a metal membrane formed thereon such as an aluminized film and a thermoplastic resin sheet composed of polyvinyl chloride or the like as decorative paper of the metal decorative panel. CONSTITUTION:An anchor coat layer 12 composed of a two-pack type curable acrylic resin is formed on an ethylene/vinyl alcohol copolymer film 11 and an aluminum vacuum vapor deposition layer 13 is formed on the anchor coat layer 12 and a polyvinyl chloride sheet 15 is laminated to the layer 13 through a two-pack type curable urethane adhesive 14 to produce a decorative sheet 2. A metal panel 3 is laminated to the decorative sheet 2 through the adhesive 14 to produce a metal decorative panel 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a decorative metal sheet by laminating a decorative sheet made by laminating plastic films on a metal plate, and imparts excellent workability such as bending and drawing to the decorative metal plate. However, the present invention relates to the improvement of metal decorative plates used for electric products such as refrigerators and air conditioner covers.

[0002]

2. Description of the Related Art Conventionally, a decorative steel plate having a steel plate surface colored or printed is widely used in various fields such as electric appliances. Examples of such a laminated metal plate include, for example, a metal decorative plate obtained by laminating a polyester film on which a pattern is printed to a metal plate (Japanese Patent Publication No. 61-51988).
A metal plate in which a polyvinyl chloride film is formed on the surface of a metal plate and a polyester film on which a pattern is printed is laminated on the metal plate (Japanese Patent Laid-Open No. 60-17464). A thermoplastic resin layer, a printing ink layer, an adhesive layer, a metal plate laminated in the order of a transparent surface thermoplastic resin layer, the basic thermoplastic resin and the melting temperature of the surface thermoplastic resin have a predetermined relationship, There is a high-definition laminated metal plate (Japanese Unexamined Patent Publication No. 63-280625) in which the visible light transmittance of a transparent surface thermoplastic resin layer is regulated within a predetermined range.

[0003]

However, the laminated metal sheet disclosed in Japanese Patent Publication No. 6-51988 does not have a thermoplastic resin layer having a good workability as an intermediate layer, and therefore lacks bending workability. The laminated metal plate disclosed in JP-A-60-17465 has a step of coating a steel sheet with polyvinyl chloride and a step of laminating a polyester film, and since a bulky steel sheet is laminated twice, workability is improved. I have a problem. Also, when a film provided with a vapor-deposited thin film on a non-plastic type polyvinyl chloride film is laminated on a metal plate, the laminated film will break without stretching due to bending, etc., so it will be a metal decorative plate with poor workability. .

In the high-definition laminated metal plate disclosed in Japanese Patent Laid-Open No. 63-280627, an adhesive layer is interposed between the transparent surface thermoplastic resin layer and the printing ink layer, resulting in poor color development. . Further, since polyvinyl chloride is used as the basic thermoplastic resin, printing is performed on a polyvinyl chloride film, and the residual solvent at the time of printing causes a trouble of firing when laminating on a steel plate. Further, the metal decorative plate made by kneading the metallic pigment into the polyvinyl chloride resin is insufficient to give a brass-like design feeling.

The present invention solves the above-mentioned drawbacks of the prior art, and provides a metal decorative plate which is excellent in processability such as bending property and drawability and has good color development of ink and excellent design. The purpose is to

[0006]

MEANS FOR SOLVING THE PROBLEMS A metal decorative plate characterized in that an ethylene-vinyl alcohol copolymer film, a metal thin film layer, a thermoplastic resin film and a metal plate, which have been subjected to an easily adhesive treatment, are laminated in this order. did. In addition, an adhesive treatment is applied to one surface of a film made of an ethylene-vinyl alcohol copolymer, and a metal thin film layer is provided thereon, and then a thermoplastic resin film is applied to the metal thin film surface of the film via an adhesive. A decorative sheet was produced by sticking the sheets together, and the thermoplastic resin film surface of the decorative sheet and the metal plate were bonded together via an adhesive to provide a method for producing a decorative metal sheet. Further, the film made of the ethylene-vinyl alcohol copolymer subjected to the easy-adhesion treatment is an ethylene-vinyl alcohol copolymer film having a colored easy-adhesion treated layer, or a two-component curing type. A metal decorative plate characterized by being an ethylene-vinyl alcohol copolymer film having an easily adhesive treatment layer made of a resin, and a method for producing the same.

[0007]

According to the present invention, since the ethylene-vinyl alcohol copolymer film having high strength and excellent elasticity is used on the surface of the metal decorative plate, a metal having excellent moldability such as bending and drawing is used. You can get a veneer. Further, it is possible to reproduce a brass-like design, and it is possible to obtain a metal decorative plate having excellent design.

[0008]

The present invention will be described in detail below with reference to the drawings based on the embodiments. FIG. 1 is a sectional view showing an example of a metal decorative plate of the present invention. FIG. 2 is a sectional view showing an example of a decorative sheet used for a metal decorative plate. FIG. 3 shows the second embodiment.
3 is a cross-sectional view of a metal decorative plate according to FIG. FIG. 4 is a sectional view of a metal decorative plate according to a comparative example.

As shown in FIG. 1, the metal decorative sheet of the present invention comprises a film 11 made of an ethylene-vinyl alcohol copolymer, an anchor coat layer 12, a metal thin film layer 13 such as aluminum vapor deposition, an adhesive layer 14, and a poly. A decorative sheet 2 made of a thermoplastic resin film 15 such as a vinyl chloride film;
The metal plates 3 are bonded together via an adhesive layer 14.

An example of manufacturing the metal decorative plate of the present invention will be shown below. First, as shown in FIG. 2, one side of a film 11 made of an ethylene-vinyl alcohol copolymer is subjected to corona discharge treatment, and an anchor coat layer 12 is provided on the corona-treated surface with a two-component curable resin solution. The film thickness is 10 to 100 by vacuum deposition or sputtering on top.
The aluminum vapor deposition layer 13 is formed in the range of 0Å.

Next, a two-component curing type urethane adhesive is applied to the aluminum vapor-deposited layer 13 of the ethylene-vinyl alcohol copolymer film 11 and dried, and then dry laminated with a thermoplastic resin film such as a polyvinyl chloride film. Then, the decorative sheet 2 is manufactured. Decorative sheet 2 is 40 ℃,
After aging for 3 days, the two-component curing type urethane adhesive is completely cured and completed.

Next, a metal plate 3 such as a galvanized steel plate
Then, a two-component curing type urethane adhesive is coated by a roll coat or the like and dried to form an adhesive layer 14, and then the metal plate is heated, and the polyvinyl chloride film 15 surface of the decorative sheet and the metal plate 3 are heated. Laminate with a rubber roll. After laminating, it is rapidly cooled to produce a metal decorative plate 1.

The metal decorative plate produced as described above is
Although it is a silver-colored metal decorative plate, an anchor coat layer 12 is formed on an ethylene-vinyl alcohol copolymer film 11
At the time of providing, a yellow colorant is added to the two-component curable resin liquid to provide a yellow anchor coat layer 12a, and an aluminum vapor deposition layer 13 is formed on the yellow anchor coat layer 12a to produce a decorative sheet. A metal decorative plate can be obtained.

As the surface film used in the above decorative sheet, an ethylene-vinyl alcohol copolymer film is suitable. Ethylene-vinyl alcohol copolymer (hereinafter referred to as EVOH) is a random copolymer of ethylene and vinyl alcohol, which is characterized by excellent gas barrier property, antistatic property, weather resistance, gloss, transparency, and processability. It is that you are. Further, EVOH is suitable as a film for forming a metal vapor deposition film because it has good adhesion to the metal vapor deposition film. The thickness of the EVOH film is
A range of 10 to 25 μm can be used, preferably 12 to 2
0 μm.

The metal thin film formed on the EVOH film is
It is mainly formed by vacuum vapor deposition, sputtering or the like.
It can also be formed by electroless plating, spray plating, or the like. As the metal forming the thin film layer, any of the metals usually used in the above method can be used,
For example, aluminum, chromium, nickel, cobalt,
Examples include copper, gold, silver, tin, zinc, brass, stainless steel, and the like. Most commonly, vacuum-deposited aluminum is used. The thickness of the metal thin film is 10 to 1000Å, and preferably about 50 to 500Å. When a metal decorative plate is made of a plastic film without a metal thin film, the metal plate is not sufficiently rust-proof, and by using the film provided with the metal thin film, rust of the metal plate can be prevented.

When the metal thin film is formed on the EVOH film, corona discharge treatment, plasma treatment, anchor coat treatment, degreasing treatment, and the like may be performed on the metal thin film formation surface, if necessary.
Known easy-adhesion treatments such as surface roughening treatment and activation treatment with a reducing chemical such as stannic chloride are performed. In particular, when forming a metal thin film by vacuum deposition or sputtering, in order to improve the mirror surface property, uniformity, and adhesiveness of the metal thin film layer,
It is desirable to form the metal thin film after providing the anchor coat layer on the EVOH film. A one-component or two-component curable resin is used as the anchor coat layer. Examples of the two-pack curable resin include combinations of polyol compounds and isocyanate compounds, epoxy compounds and amine compounds, acrylic resins and melamine resins, and the like.

As a method of forming the anchor coat layer on the film, the resin coating solution is coated by gravure coating, reverse roll coating or the like, and the thickness after drying is usually about 0.5 to 5 μm. In some cases, the anchor coat layer is colored yellow and a vapor deposition layer of aluminum is formed on the anchor coat layer to make a brass design. In some cases, gold-plated is used to express a brass-like design, but gold vapor deposition increases costs and cannot be used except in special cases.

As the thermoplastic resin sheet used as the base material of the decorative sheet, a polyvinyl chloride sheet (hereinafter referred to as PVC) is suitable in terms of workability with a metal plate. As the PVC sheet, one having a good processability is used in which 10 to 40 parts by weight of a plasticizer is added to 100 parts by weight of polyvinyl chloride resin. The thickness of PVC sheet is 60 ~ 20
It can be used in the range of 0 μm, but is preferably 80 to 120 μm. Other than polyvinyl chloride resin, any resin suitable for the purpose such as processability can be used. For example, acrylic,
Examples thereof include ABS, polystyrene, vinyl chloride-vinyl acetate copolymer and the like.

Specific examples will be described below. (Example 1) As shown in FIG. 2, a corona-treated surface of an ethylene-vinyl alcohol copolymer film 11 (“Eval” manufactured by Kuraray Co., Ltd.) having a thickness of 12 μm and corona-treated on one side was treated with a two-component solution. A curable acrylic resin coating liquid was gravure coated to form an anchor coat layer 12 having a thickness of 5 μm, and an aluminum vapor deposition layer 13 having a thickness of 400 Å was formed thereon by vacuum vapor deposition.

Next, a two-component curing type urethane adhesive (ESDINE 51 manufactured by Sekisui Chemical Co., Ltd.) was applied to the surface of the aluminum vapor deposition layer 13.
8X-2) is applied by a gravure reverse coating method to form an adhesive layer 14 of 10 g / m ² in a dry state, and a polyvinyl chloride sheet 15 having a thickness of 100 μm (manufactured by Riken Vinyl Industry Co., Ltd.) is formed on the adhesive layer 14. Dry laminated and decorative sheet 2
Was produced. The decorative sheet 2 was aged at 40 ° C. for 3 days to completely cure the adhesive and complete the decorative sheet.

As shown in FIG. 1, a metal plate having a thickness of 0.
5 mm hot-dip galvanized steel sheet 3 (manufactured by Nippon Steel Corporation)
Two-component curing type urethane adhesive (Sekisui Chemical Co., Ltd.)
Esdyne 518X-2) made by roll coating
An adhesive layer 14 of 5 g / m ² was formed in a dry state.

Next, the PVC sheet 15 side of the decorative sheet 2 was superposed on the adhesive layer surface of this steel sheet and laminated with a rubber roll. Laminating conditions are: steel plate 230
C., the temperature of the steel plate is 200.degree. C., the rubber roll temperature is room temperature, and the laminating speed is 30 m / min.
I went in. After lamination, the decorative steel plate was rapidly cooled to obtain a silver-colored metal decorative plate. The metal decorative plate manufactured as described above is bent according to JIS K6744 (180 ° O
Both T) and Erichsen (7 mm extrusion) were satisfactory.

(Embodiment 2) As shown in FIG.
Using the same EVOH film 11 as above, a two-component curing type acrylic resin coating liquid containing a yellow colorant was gravure coated as an anchor coating agent to form a yellow anchor coating layer 12a having a thickness of 5 μm. Then, an aluminum vapor deposition layer 13 having a thickness of 400Å was formed thereon by vacuum vapor deposition.

Then, as in Example 1, the EVOH film vapor-deposited with aluminum and the PVC sheet were dry-laminated and further laminated with a metal plate to prepare a metal decorative plate as shown in FIG. This metal decorative plate became a gold-colored brass-like metal decorative plate, and had excellent designability.

Comparative Example 1 A 12 μm thick biaxially oriented polyethylene terephthalate (hereinafter referred to as PET) film (“Lumirror” manufactured by Toray Industries, Inc.) was used in the same manner as in Example 1 instead of the EVOH film. A metal decorative plate as shown in FIG. 4 was produced. The metal decorative plate thus manufactured can be the same as the metal decorative plate of Example 1 in terms of design, but when bent at 180 ° OT, PET is used.
The film was cracked and could not be used as a product.

(Comparative Example 2) As a colored anchor coating agent in Example 2, a one-component curing type resin coating liquid (VM-AL medium manufactured by Dainichiseika Kogyo Co., Ltd.) was used.
Similarly to the above, after forming the anchor coat layer, an aluminum vapor deposition layer was formed by vacuum vapor deposition. As described above, when the anchor coating agent is a one-component curing type resin, the adhesive strength between the EVOH film and the aluminum vapor-deposited film is weak, and peeling occurs in the cellophane tape adhesion test, and there is no problem in using it for a metal decorative plate. It was

[0027]

As described above, according to the present invention,
It is possible to obtain a metal decorative plate having excellent formability such as bending and drawing. In addition, a brass-like design can be reproduced, and a metal decorative plate with an excellent design property can be obtained, which helps differentiate refrigerators, air conditioners, and the like, and is expected to expand sales channels.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a metal decorative plate of the present invention.

FIG. 2 is a cross-sectional view showing an example of a decorative sheet used for a metal decorative plate.

FIG. 3 is a cross-sectional view of a metal decorative plate when a colored anchor coat layer is provided.

FIG. 4 is a cross-sectional view of a metal decorative plate according to Comparative Example 1.

[Explanation of symbols]

 1 Metal Decorative Plate of the Present Invention 2 Decorative Sheet Used for Metal Decorative Plate 3 Metal Plate 11 EVOH Film 12 Anchor Coat Layer 12a Colored Anchor Coat Layer 13 Metal Thin Film Layer (Aluminum Deposition Layer) 14 Adhesive Layer 15 PVC Sheet 19 PET Film

Claims (4)

[Claims] 1. A metal decorative plate comprising an ethylene-vinyl alcohol copolymer film subjected to an easily adhesive treatment, a metal thin film layer, a thermoplastic resin film and a metal plate, which are laminated in this order. 2. A film made of an ethylene-vinyl alcohol copolymer is subjected to an easy-adhesion treatment on one side, a metal thin film layer is provided thereon, and then a thermoplastic resin film is adhered to the metal thin film surface of the film. A method for producing a decorative metal sheet, characterized in that a decorative sheet is produced by laminating the sheet with a thermoplastic resin film surface of the decorative sheet, and a metal sheet is attached with an adhesive agent. 3. The ethylene-vinyl alcohol copolymer film subjected to the easy-adhesion treatment is an ethylene-vinyl alcohol copolymer film having a colored easy-adhesion treated layer. The metal decorative plate according to claim 1 or 2, and a method for manufacturing the same. 4. The ethylene-vinyl alcohol copolymer film subjected to the easy-adhesion treatment is an ethylene-vinyl alcohol copolymer film formed with an easy-adhesion treated layer made of a two-component curing type resin. The metal decorative plate according to claim 1, claim 2, and claim 3, and a method for manufacturing the same.