JPS5923558B2 - Three-dimensional pattern-forming transfer foil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer foil, and particularly to a transfer foil whose transfer coating has a three-dimensional pattern.

Various metallized transfer foils with patterns have been known, but most of them have a pattern printed on the entire surface (peta) using a gravure roll, etc., and the thickness of the pattern is at most 2 to 3 μm. That's about it.

Therefore, it is impossible to obtain a three-dimensional sensation from the transfer coating film obtained by transferring each of them. The inventors of the present invention have developed a transfer foil that provides an unprecedented transfer coating film.As a result of the study, we found that a three-dimensional pattern with protruding pattern parts was found not only in terms of appearance but also in the surface condition of the coating film. We have succeeded in developing a new transfer foil that can provide a transfer coating film with That is, in the present invention, a release layer is provided on a sheet base material, and a non-solvent type curable ink is applied on the release layer directly or through a protective layer.
The present invention provides a transfer foil capable of forming a three-dimensional pattern, which is provided with an uneven pattern layer having a thickness of μ or more, and on which a metal vapor deposition layer and an adhesive layer are provided.

Next, the present invention will be explained based on the drawings.

FIG. 1 is a partially enlarged sectional view schematically showing an example of the transfer foil of the present invention, in which a release layer 2 is sequentially formed on a base film 1.
It is constructed by providing a protective layer 3, an uneven pattern layer 4, a metal vapor deposition layer 5, and an adhesive layer 6, which are provided as necessary. FIG. 2 is a partially enlarged sectional view schematically showing a composite sheet in which the transfer foil shown in FIG.
The transfer foil shown in the figure is transferred to a sheet base material T such as a plastic sheet, paper, wood, plywood, etc., and an adhesive layer 6,
A transfer coating film having a structure including a metal vapor deposited layer 5, an uneven pattern layer 4, a protective layer 3 provided as necessary, and a release layer 2 is applied.

As can be understood from the drawings, during transfer, the adhesive layer 6, release layer 2, and protective layer 3 shown in FIG. A transfer coating film having a three-dimensional pattern with protruding pattern parts is obtained. In order to obtain such a transfer coating film, it is essential that the transfer foil has the above-mentioned structure and that the pattern layer 4 has an uneven depth of 10 μm or more.

In addition, this uneven pattern layer needs to be harder than the release layer 2, the protective layer 3, and the adhesive layer 6 in the temperature range from room temperature to the thermal transfer temperature, and not be deformed by heat and pressure during transfer, and has relatively little deformation. Needless to say. In addition, due to the structure of the transfer foil, the paint for the uneven pattern layer is one that has good vapor deposition processability, that is, Io-4.
It is desirable to have a material that generates less outgas, which is a problem even under reduced pressure on the order of Torr. From this point of view, it is preferable that the uneven pattern layer 4 is formed by silk screen printing or the like, and as the paint, a non-solvent type curable ink such as a so-called UV ink that is cured by ultraviolet irradiation is used.・When UV ink is used in the silk screen printing method, it is extremely easy to obtain an uneven pattern of 10μ or more, and a coating film with excellent mechanical and chemical properties can be obtained, and it has excellent abrasion resistance. It is possible to provide a high-quality transfer coating film with excellent properties such as durability, chemical resistance, and protection effect for metal vapor deposited films.For the uneven pattern layer 4, the paint is applied only to the convex portions and not to the concave portions. Although it is common and preferable to form the coating by a method of coating the entire surface, it is of course possible to form an uneven pattern therein, or to form the unevenness in a plurality of stages.

In either case, it is necessary that the depth of the unevenness, that is, the height difference is 10 μm or more. There is no particular limit to the upper limit, but it is usually 10.
It is up to about 0μ. In consideration of steric effect, economy, workability, etc., 15 to 50 μm is particularly preferable. By setting the unevenness depth to 10 μm or more, a three-dimensional effect is substantially imparted to the transferred coating film, and at about 15 μm, the three-dimensional effect becomes even clearer, and the unevenness can be better tactually distinguished.

When the thickness is 50μ or more, the three-dimensional effect is further improved, but workability (coating film peels off during vapor deposition processing and adhesive coating processing), economic efficiency, and abrasion resistance of the transfer coating film may be adversely affected depending on the form of the pattern. decreases to

As the sheet-like base material, that is, the base film 1, a plastic film such as a polyester film, paper, or the like is appropriately used, as is conventionally well known.

The adhesive layer 6 may be made of any material that can bring the resulting transfer foil into close contact with the surface of the object to be transferred and the metal vapor deposited film 5 (any of these may be used, such as acrylic, polyester, vinyl chloride, or synthetic rubber). Thermoplastic synthetic resin adhesives such as
. In the latter case, a release paper or the like is used in combination. The thickness of the adhesive layer is preferably such that it provides a uniform surface along the uneven pattern of the uneven pattern layer 4. The metal vapor deposition layer 5 is necessary for imparting metallic luster to the transfer coating film, and is formed by a vacuum vapor deposition method.

The thickness of the metal vapor deposition layer is 20 to 200 mμ (usually 60 mμ
(of a good degree) is common. As the metal, aluminum, gold, silver, copper, chromium, nichrome, nickel, etc. are used. The material of the metal vapor deposited layer itself is harder than the uneven pattern layer, but as mentioned above, its thickness is much thinner than the uneven pattern layer, so it deforms following the uneven pattern layer during transfer processing and can contribute to the formation of a three-dimensional pattern. be. The protective layer 3 provided as necessary has good adhesion to the uneven pattern layer 4, has heat resistance,
It is selected from resins that have good abrasion resistance and are softer than the 6 uneven pattern layers. By using such a protective layer, the protective layer deforms while following the uneven pattern during heating and pressure bonding during transfer processing, becomes uneven, and contributes to the formation of a three-dimensional pattern. As the resin for the protective layer, thermosetting or thermoplastic resins such as acrylic polymers, polyvinyl chloride, cellulose, polyester, and synthetic rubber are used. The thickness of the protective layer is preferably 5μ or less6, especially 1 to 3μ (・o Release layer 2 is made of cellulose-based, acrylic-based polymers, wax, etc., so that the coating film can be easily peeled off from the base film during thermal transfer processing. It is preferable to use a coating film that has the function of making the surface opaque and is softer than the uneven pattern layer 4, as well as the protective layer 3 provided as necessary.

The thickness of the release layer is usually 0.1 to 2μ, particularly 0.5 to 1μ.
μ is preferred. When the base film 1 is an internally hazed film, a matte film with unevenness, a hairline film, etc., it is better to make the release layer slightly thicker, 1 to 3 μm, for better releasability and easier transfer processing. There is no particular restriction on the material of the object to which the foil is to be transferred, and plastic sheets, paper, wood, synthetic material, etc. can be used as appropriate.

Polyester film is a suitable material. In this way, it is possible to obtain a transfer foil that provides a transfer coating film that has a three-dimensional effect that is noticeable not only in appearance but also when touched with the hand, and can be used in a wide range of applications, such as around clock dials and various electrical products. The three-dimensional pattern is effectively used.

[Brief explanation of drawings]

FIG. 1 is a partially enlarged sectional view schematically showing the transfer foil of the present invention, and FIG. 2 is a partially enlarged sectional view schematically showing a composite sheet in which the transfer foil of FIG. 1 is transferred to a sheet base material. be. DESCRIPTION OF SYMBOLS 1... Base film, 2... Release layer, 3... Protective layer, 4... Uneven pattern layer, 5... Metal vapor deposition layer, 6...
... Adhesive layer, 7... Sheet base material.

Claims (1)

[Claims] 1 A release layer is provided on the sheet base material, and a 10 μm ink is applied directly or through a protective layer using a non-solvent type curable ink.
A three-dimensional pattern-forming transfer foil comprising an uneven pattern layer having a thickness of the above thickness, and a metal vapor deposition layer and an adhesive layer provided thereon.