JP2520273B2 - Method for producing weather resistant metallic film - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing a metallic film excellent in weather resistance by a transfer method. More specifically, a weather resistant metallic film in which a transparent adhesive coating layer (5), a metal vapor deposition layer (4) and a protective resin coating layer (3) are formed in this order on one side of a vinyl chloride resin layer (6). The present invention relates to a manufacturing method of.

[Prior Art] Metallic sheets that have been conventionally used for automobile molding parts, window frame sash moldings, exterior seals, etc. are metal-deposited on the basis of synthetic resin film such as polyester film and fluorine film. A sheet that has been laminated by dry laminating a vinyl chloride sheet on a processing film or extruding a vinyl chloride resin, or a sheet that has been laminated by transfer processing or lamination with a transfer constituent material to a vinyl chloride sheet, Alternatively, it is composed of a vapor-deposited vinyl chloride sheet which is directly vapor-deposited on a vinyl chloride sheet.

However, when a vinyl chloride sheet is dry-laminated on a metal vapor-deposited film that uses a polyester film or a fluorine film as a base material, not only is it difficult to dry-laminate it, but also it is not possible to obtain sufficient laminating strength. Due to its large thickness, it has poor flexibility, and its mountability on parts that require bending is not very good. In the case of extruding vinyl chloride, there was a problem that uniform thickness accuracy could not be obtained.

In addition, when performing transfer processing using a transfer constituent material on a vinyl chloride sheet or lamination processing by laminating, if the vinyl chloride sheet is extremely thin, wrinkles are likely to occur during transfer processing or lamination, and if the vinyl chloride sheet is thick, flexibility is increased. However, there is a problem in that the mountability becomes poor and sufficient laminating strength cannot be obtained.

The direct vapor deposition process on vinyl chloride has a problem in that it is difficult to obtain a sufficient adhesive force at the interface, which is a practical problem.

[Object of the Invention] In view of the above conventional problems, in the method for producing a weather-resistant metallic film of the present invention, when a transfer process using a transfer constituent material to a vinyl chloride sheet or a laminating process by laminating is performed, When the vinyl sheet is extremely thin, wrinkles are likely to occur during transfer processing or lamination, and when the reinforced vinyl sheet is thick, the flexibility is poor and the mountability is poor, and sufficient lamination strength cannot be obtained. Another object of the present invention is to provide a novel manufacturing method for obtaining a metallic film having excellent weather resistance.

[Structure of the Invention] That is, the present invention produces a transfer foil by sequentially forming a protective resin coating layer, a metal vapor deposition layer, and a transparent adhesive coating layer on a base film directly or via a release agent layer. Then, a method of forming a vinyl chloride resin layer on the surface of the transparent adhesive coating layer by a film casting method, and then peeling off the base film is adopted, whereby various problems of conventional products are solved. The method for producing a metallic film having excellent weather resistance has been completed.

More specifically, a weather resistant metallic in which a transparent adhesive coating layer (5), a metal vapor deposition layer (4) and a protective resin coating layer (3) are formed in this order on one surface of the vinyl chloride resin layer (6). In the film manufacturing method, the following steps a and b
And a process c, which is a method for producing a weather resistant metallic film.

In step a, the protective resin coating film layer (5), on one surface of the base film (1) directly or through the release agent layer (2),
A metal foil layer (4) and a transparent adhesive coating layer (5) are sequentially formed to produce a transfer foil.

In step b, a vinyl chloride resin layer (6) is formed on the surface of the transparent adhesive coating layer (5) of the transfer foil produced in step a by a film casting method, and the transfer foil produced in step a and vinyl chloride are formed. A composite of the transfer foil in which the resin layer (6) is integrated and the vinyl chloride resin layer (6) is manufactured.

In step c, the base film (1) is peeled off from the composite of the transfer foil and the vinyl chloride resin layer (6) produced in step b to form a transparent adhesive coating on one side of the vinyl chloride resin layer (6). Layer (5), metal deposition layer (4) and protective resin coating layer (3)
To produce a weather resistant metallic film.

By passing through each of the above steps, it is possible to provide a method for producing a weather resistant metallic film.

As the base film (1) in the method for producing a weather-resistant metallic film of the present invention, any one can be used as long as it has sufficient self-holding property, for example, polyester, polyamide, polyamideimide, polyethylene, polypropylene, cellulose acetate, Resins such as polycarbonate, polyvinyl chloride, and fluororesin, or film or sheet such as cellophane paper and glassine paper, film or sheet of stainless steel or other metal, release paper or release film, etc. Used. Particularly, as the base film (1), a film-like material of the above resins and having a thickness of about 9 to 50 μm is used, and it is possible to continuously produce a large amount of weather resistant metallic film without wrinkles or cracks. Is preferred.

When the base film (1) does not have good releasability from the protective resin coating layer (3), a paraffin wax, silicone, a fluororesin, a surfactant or the like is applied to form the release agent layer (2). It may be formed.

As the protective resin coating film layer (3) of the method for producing a weather resistant metallic film of the present invention, any one having sufficient weather resistance can be used. For example, polyethylene, acrylic resin, vinyl chloride-acetic acid-vinyl. Copolymer, nitrocellulose, epoxy resin, polyurethane resin, polysulfonic acid ether resin, polycarbonate resin, polyarylate resin, polystyrene resin, polyethylene terephthalate resin, polyimide resin, rubber, etc. are appropriately used. In particular, it is preferable to use a resin having a thickness of about 1 to 10 μm as the protective resin coating layer (3) from the viewpoint that continuous production of a weather-resistant metallic film without wrinkles or cracks can be mass-produced. When the thickness is less than 1 μm, it is difficult to obtain a weather resistant metallic film having sufficiently stable surface strength, acid resistance, alkali resistance and the like, and when it is more than 10 μm, the weather resistant metallic film is obtained. However, it is not preferable because it becomes rigid and the mountability on parts that require bending is not so good.

The metal vapor-deposited layer (4) used in the method for producing a weather-resistant metallic film of the present invention is formed on the surface of the protective resin coating layer (3) by a conventional method, for example, aluminum, nickel, chromium, copper, silver,
It is formed by evaporating a metal such as gold or an alloy thereof, and aluminum is most preferable in terms of gloss and cost. The thickness is usually selected as appropriate depending on how much the surface of the transferred material is to be made metallic, and the kind of metal, but usually about 30 nm or more is necessary. When the thickness of the vapor-deposited metal layer (4) is less than 30 nm, the metal-deposited layer (4) does not exhibit a stable and sufficient metallic luster and the weather-resistant metallic film obtained by using the method for producing a weather-resistant metallic film of the present invention. It is not preferable because the surface cannot be made sufficiently metallic.

As the transparent adhesive coating layer (5) in the method for producing a weather resistant metallic film of the present invention, for example, a polyester resin,
Polyamide resin, polyethylene resin, acrylic resin,
Vinyl chloride-vinyl acetate copolymer, nitrocellulose,
Epoxy resin, polyurethane resin, polysulfonic acid ether resin, polypolycarbonate resin, polyarylate resin, polystyrene resin, polyethylene terephthalate resin, polyimide resin, rubber or the like may be used alone or in combination. The thickness of the transparent adhesive coating layer (5) is usually selected from the range of about 1 to 10 μm.

The vinyl chloride resin used in the method for producing a weather resistant metallic film of the present invention is formed on the surface of the transparent adhesive coating layer (5) by a film casting method. The thickness of the vinyl chloride resin layer (6) is usually selected from the range of about 2 to 30 μm.

 Next, the present invention will be described with reference to examples.

Example 1 Example 1 A polyester film having a thickness of 25 μm was used as a base film (1), and a paraffin wax as a main component had a thickness of 0.1.
A release agent layer (2) having a thickness of 5 μm is formed by coating, and a protective resin coating layer (3) having a thickness of 2 μm and made of an acryl-urethane resin, an aluminum metal vapor deposition layer (4) having a thickness of 50 nm, on the surface thereof. Using a transfer foil in which a transparent adhesive coating layer (5) made of a vinyl chloride-vinyl acetate copolymer having a thickness of 2 μm is sequentially laminated, a vinyl chloride resin is applied to the transparent adhesive coating layer (5) surface. A film having a thickness of 5 μm was formed by a film casting method, and then the polyester film was peeled off to obtain a weather resistant metallic film of the present invention.

Example 2 A polyester film having a thickness of 50 μm was used as a base film (1), a release agent layer (2) having an acrylic resin as a main component and having a thickness of 1 μm was formed by coating, and a polyurethane film having a thickness of 5 μm was formed on the surface thereof. Protective resin coating layer composed mainly of resin (3), thickness 30 nm chromium metal vapor deposition layer (4), thickness 10 μm
Transparent adhesive coating layer composed of polyurethane resin (5)
Using a transfer foil formed by sequentially laminating the transparent adhesive coating layer (5), a vinyl chloride resin was formed into a film having a thickness of 20 μm by the film casting method, and then the polyester film was peeled off to obtain the weather resistance of the present invention. I got a metallic film.

Comparative Example 1 A vinyl chloride sheet having a thickness of 50 μm was laminated by a dry lamination method onto a metal vapor-deposited polyester film having a thickness of 50 μm and an aluminum metal vapor-deposited layer (4) provided on a polyester film having a thickness of 25 μm. I got a metallic sheet.

Comparative Example 2 A vinyl chloride sheet having a thickness of 25 μm was directly vapor-deposited with aluminum to obtain a conventional weather resistant metallic sheet.

[Effects of the Invention] The weather resistance of the weather resistant metallic films obtained in Examples 1 and 2 and Comparative Examples 1 and 2 is JIS B 77.
The results measured by the 53 method are shown in Table 1.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of a weather resistant metallic film obtained by the method for producing a weather resistant metallic film according to the present invention. FIG. 2 is a cross-sectional view showing the structure of a transfer foil used in the method for producing a weather resistant metallic film of the present invention. (1): Base film (2): Release agent layer (3): Protective resin coating layer (4): Metal deposition layer (5): Transparent adhesive coating layer (6): Vinyl chloride resin layer

Claims (1)

(57) [Claims] 1. A weather resistance obtained by forming a transparent adhesive coating layer (5), a metal deposition layer (4) and a protective resin coating layer (3) in this order on one side of a vinyl chloride resin layer (6). A method for producing a weather resistant metallic film, which comprises producing the metallic film through the following steps a, b and c. Step a A protective resin coating layer (3), a metal vapor deposition layer (4), and a transparent adhesive coating layer (5) are provided on one surface of the base film (1) directly or through the release agent layer (2). Transfer foil is manufactured by sequentially forming. Step b The vinyl chloride resin layer (6) is formed on the transparent adhesive coating layer (5) surface of the transfer foil manufactured in step a by a film casting method, and the transfer foil and vinyl chloride resin layer manufactured in step a are formed. A composite of the transfer foil in which (6) is integrated and the vinyl chloride resin layer (6) is produced. Step c The base film (1) is peeled off from the composite of the transfer foil and the vinyl chloride resin layer (6) produced in the step b, and the transparent adhesive coating layer ( 5), a metal vapor deposition layer (4) and a protective resin coating film layer (3) are formed in this order to produce a weather resistant metallic film.