JPS60172583A - Thin metal membrane transfer sheet - Google Patents

Abstract

PURPOSE:To obtain a metal vapor deposition transfer sheet generating no transfer of a release agent, by laminating an org. polymer film, a metal membrane and an adhesive layer to a substrate film having releasability in this order. CONSTITUTION:An org. polymer film, a vapor deposition membrane comprising a metal such as aluminum and an adhesive layer are laminated to the single surface of an org. resin film containing an antistatic agent in this order. By this method, a metal membrane transfer sheet generating no transfer of a release agent to the surface of the org. polymer film after transfer is obtained. By using this metal membrane transfer sheet, a sharp transfer pattern is obtained. Further, the surface hardness, color tone and gloss of the transfer pattern are well and the surface of the org. polymer film directly appears. In addition, becasue the coating of a release agent layer is omitted, production cost becomes inexpensive.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a metal thin film transfer sheet without a release agent layer.

[Prior art and its problems] Metal thin film transfer sheets are conventionally made by coating the surface of a base organic resin film with a release agent such as wax, silicone, or cellulose compound, and then coating the surface with an organic polymer film. It is manufactured by coating it with a metal vapor-deposited film such as aluminum and an adhesive layer on top of it.

However, in this method, the mold release agent is transferred to the surface of the organic polymer film after transfer, and as a result, the inherent properties of the resin layer surface such as hardness, adhesion, surface tension, gloss, and color tone are affected. be damaged.

[Object of the Invention] In view of the above-mentioned drawbacks of the prior art, the object of the present invention is to remove the application of a release agent to the base film and directly apply an organic polymer film to a base film with mold releasability. The object of the present invention is to provide a metal vapor deposition transfer sheet that does not transfer a release agent by laminating a metal thin film and an adhesive layer in this order.

[Structure of the Invention] The transfer sheet according to the present invention is a metal sheet in which an organic polymer film, a vapor-deposited thin film of a metal such as aluminum, and an adhesive layer are laminated in this order on one side of an organic resin film containing an antistatic agent. This is a film transfer sheet.

The antistatic agent in the present invention refers to an anionic surfactant,
They are classified into cationic surfactants, amphoteric surfactants, and nonionic surfactants. Examples of anionic surfactants include sodium alkyl phosphate, sodium alkylphenol polyethylene glycol sulfate, etc., and examples of cationic surfactants include aliphatic amines, quaternary ammonium, benzimidazole, aliphatic amides, etc. Polyoxyethylene fatty acid ester, polyoxyalkyl ether,
Examples include polyhydric alcohol fatty acid ester, polyoxyethylene sorbitan fatty acid Nisder, polyoxyethylene alkylamine, and the like.

Examples of organic resin films include polyolefins such as polyethylene and polypropylene, polyamides such as nylon G, nylon 66, and nylon 12, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polynitrocellulose, and polyacetic acid. Examples include films made of organic resins such as cellulose, typified by cellulose, polyvinyl alcohol, 3-fluorinated polyethylene, polycarbonate, polymethyl methacrylate, and polyimide. It may be something like that. Moreover, the organic resin film may be an unstretched film or a stretched film. In the case of a stretched film, either uniaxial or biaxial stretching may be used, and in the case of biaxial stretching, either simultaneous biaxial stretching or sequential biaxial stretching may be used. The thickness of the organic synthetic film is preferably 5 μm or more and 300 μm or less, and 10 μm or more for continuous vapor deposition processing, ease of handling, and sharp cutting of the laminated film of organic polymer film and metal foil during transfer. , those having a thickness of 50 μm or less are particularly preferably used.

The concentration of the antistatic agent added in the organic resin film needs to be 3% by weight or more and 20% by weight or more. If this concentration is less than 3% by weight, the pattern will not be clearly cut during transfer, and if it is more than 20% by weight, the antistatic agent that bleeds out on the surface of the organic resin film will be transferred to the surface of the organic polymer film, resulting in poor hardness and adhesion. , the inherent properties of the organic polymer film surface, such as surface tension, gloss, and color tone, may change or be impaired.

Further, the metal thin film is generally vacuum-deposited uniformly on the surface of the organic polymer coating on the organic resin film of the base material by vacuum evaporation, sputtering, ion plating, or the like. More specifically, 10-2 to 10-7 mm
The metal is heated in a high vacuum atmosphere of Hg using a resistance heating method, an induction heating method, or a high frequency heating method.
A metal target is deposited onto the base organic resin film by sputtering in a high vacuum at 100 g.

The thickness of the metal varies depending on the application, but in order to obtain a stable appearance and color tone, a film thickness of 0.01 μm or more is required. However, if the thickness of the metal layer exceeds 2 μm, it becomes brittle and its adhesive strength with the resin layer decreases, making it impossible to maintain a stable laminated state.

The organic polymer film is a layer made of acrylic resin, polyester resin, melamine resin, etc. and having a thickness in the range of 0.5 to 10 μm. In order to adjust the color tone of the thin film after transfer, a colorant such as a dye or a pigment may be mixed into the film. In addition,
The organic polymer film may be made of the same material as the base organic resin film except for the presence or absence of an antistatic agent.Also, the organic polymer film may be made of the same material as the base organic resin film by coextrusion, lamination, etc. Although it can be laminated onto a resin film, a coating method is usually used.

As the contact agent layer, either pressure-sensitive or heat-sensitive materials can be used. For example, acrylic acid ester-vinyl chloride copolymer, polyvinyl butyral, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, etc. are used. The thickness of the adhesive is in the range of 0.1 to 30 μm, particularly preferably 0.3 to 10 μm.
μm is good.

If the thickness is too thin, the adhesive strength will be insufficient; (2) If the thickness is too thick, the adhesive strength will be good, but the lines at the edges of the transferred pattern will not be clear and will be jagged.

Transfer is accomplished by pressing the adhesive side of the transfer foil according to the invention with a relief mold of the desired pattern onto the surface of the desired substrate, such as plastic, metal, wood, paper, etc.

If the adhesive used at this time is heat-sensitive, transfer is performed by pressing the relief mold while heating.

[Effects of the Invention] The metal thin film transfer sheet according to the present invention has the following excellent effects.

(b) A clear transfer pattern can be obtained.

(b) The hardness, color tone, gloss, etc. of the transfer pattern surface are good,
The surface of the organic polymer film appears directly on the surface.

(c) Since the coating of a mold release agent layer can be omitted, manufacturing costs are reduced.

[Examples] The present invention will be described below based on Examples and Comparative Examples.

・Example 1 Three layers of melamine resin were coated on one side of a 75 μm thick biaxially stretched polyethylene terephthalate film prepared by mixing 5% fatty acid ester of polyethylene glycol with a molecular weight of 1000.
Apply a 0% concentration toluene solution using a bar coater,
It was dried at 140 degrees for 2 minutes to obtain a coating film with a thickness of 5 μm.

On this film, aluminum was vapor-deposited to a thickness of 800 Å in a vacuum of 5 x 10-5 mmHg, and then an acrylic heat-sensitive adhesive was applied on top of this using a bar coater to a thickness of 2 μm, and dried at 80°C for 1 minute. A transfer sheet was prepared. Then, using this transfer sheet, a letterpress plate with a lattice pattern was heated to 140° C. and foil stamped on paper to obtain a clear silver pattern.

・Example 2 "OLEOS" as an adhesive was applied to one side of a 38 μm thick polybutylene terephthalate biaxially stretched film prepared by adding 4% by weight of sodium dodecylbenzenesulfonate.
An acrylic resin containing 2% by weight of OL FAST YELLOW 2G" (manufactured by Taoka Chemical Industry Co., Ltd.) was applied using a bar coater and dried at 80°C for 1 minute to form a coating with a thickness of 1 μm. A 500 Å aluminum vapor-deposited film was applied on top of this. 5
The layers were deposited in a 10-40x bell jar type evaporator.

A thermoplastic adhesive having the following composition was applied to the surface of the vapor-deposited aluminum using a bar coater, and dried for 30 seconds in a hot air circulation dryer at 80° C. to obtain a coating film with a thickness of 1 μm.

1. Aron A 1001 (acrylic ester manufactured by Toagosei Chemical Industry Co., Ltd.) 25 parts by weight2. NC-1 (Nitrocellulose manufactured by Toyo Ink Manufacturing)
5 parts by weight 3. Denka Vinyl #1000A (vinyl chloride/acid-resistant vinyl copolymer manufactured by Denki Kagaku Kogyo)
20 parts by weight4. Toluene 50 parts by weight5. Ethyl acetate 50 parts by weight The transfer sheet thus prepared was foil-stamped onto a postcard at a temperature of 150° C. using a stamp with the characters ``Happy New Year.''

In this way, I made a New Year's card with clear gold letters.

・Example 3, Comparative Example 1 A 25 μm thick biaxially oriented polypropylene film was prepared by mixing 7% by weight of dodecyldimethylamine oxide with the following chemical structure, and the above thionic surfactant was not mixed instead. A 25 μm thick biaxially oriented polypropylene film was coated with wax to a thickness of 0.5 mm. Next, 2 μm of acrylic resin was applied on the direct polypropylene film surface and the wax coated surface of the two types of films described in Aluminum was deposited. The adhesive used in Example 2 was applied to the surface of this vapor-deposited film to a thickness of 1 μm using the same method.

Using the two types of transfer sheets adjusted according to the above procedure, 15 minute printed circuit patterns were printed on an 11 mm thick ABS board.
Transfer was performed at a temperature of 0°C.

When the characteristics of the two types of transfer patterns obtained were compared, the results shown in the following table were obtained.

Table 1

Claims (1)

[Claims] 1. A metal thin film transfer sheet, characterized in that an organic polymer film, a metal thin film, and an adhesive layer are laminated in this order on one side of an organic resin film containing an antistatic agent.