JPH0755595B2 - Method for forming partial vapor deposition layer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of partially printing a water-soluble resin and using this to form a partial metal vapor deposition layer.

More specifically, the present invention relates to a method for forming a partially vapor-deposited layer that allows a pattern to be cut out easily when the colored ink layer is provided together with the metal vapor-deposited layer.

<Prior Art> By printing a water-soluble resin on an arbitrary base, vapor-depositing a metal on the entire surface thereof, and then washing with water, and removing the metal vapor-deposited layer on the water-soluble resin, a partially vapor-deposited layer is formed. The method for obtaining it is known, and is described in, for example, Japanese Patent Publication No. 43-2600.

Further, an application of this technique to a transfer foil is described in Japanese Utility Model Publication No. 53-21124.

On the other hand, a method of forming a partially vapor-deposited layer using a water-absorbent resin (water-swellable resin) is disclosed in JP-A-55-152089 and JP-A-
55-166284. This method is a method of forming a partially vapor-deposited layer by printing a water-absorbent resin, vapor-depositing a metal on the entire surface, applying water to cause the water-absorbent resin to expand and project, and mechanically removing the protrusions. Is.

<Problems to be Solved by the Invention> In the method using a water-soluble resin, since the vapor deposition layer formed on this resin impedes the permeation of water, it is difficult to uniformly permeate the water. There is a drawback that a partially vapor-deposited layer with a fine (fine) image cannot be obtained.

That is, when water penetrates into one part, the other parts cannot be removed sufficiently and both of them cannot be removed. Water is peeling off the layers. This problem becomes an even greater problem because when the printing ink layer is overlaid on a part of the water-soluble resin, the ink layer further impedes the penetration of water.

In the method using the water-absorbent resin, since the expanded and projected portion is mechanically shaved off, it is also difficult to obtain a partially vapor-deposited layer having a fine image.

It is an object of the present invention to provide a method for overcoming the above problems and obtaining a more precisely imaged partial vapor deposition layer.

<Means for Solving Problems> In order to achieve this object, the present invention prints a water-soluble resin on an arbitrary substrate and prints an ink containing a water-absorbent resin on the water-soluble resin layer, After providing the metal vapor deposition layer on the entire surface, the water vapor expansion of the water absorbent resin destroys the vapor deposition layer to promote water penetration and dissolves the water soluble resin to dissolve the water absorbent resin layer and the metal on the water soluble resin. A method for forming a partial vapor deposition layer, which comprises removing the vapor deposition layer.

<Operation> In the water washing step in the present invention, when a small amount of water reaches the water absorbent resin layer, the water absorbent resin layer expands and destroys the metal vapor deposition layer. Further, if there is a printing ink layer outside the vapor deposition layer, this printing ink layer is also destroyed. Then, the water content that has reached the water-absorbent resin layer is diffused in the direction of the water-soluble resin layer provided under the water-absorbent resin layer, while destroying the vapor deposition layer and the printing ink layer on the water-absorbent resin layer, Diffuse and penetrate rapidly. Therefore, as compared with the case where the water-absorbent resin layer is not provided, the rate at which water permeates the entire surface of the water-soluble resin layer becomes significantly faster, faster than the water peels off the vapor deposition layer around the water-soluble resin layer, and This water-soluble resin layer and each layer above it can be surely removed. As a result, a partially vapor-deposited layer of a fine image can be formed without error.

<Description of Embodiments> Hereinafter, the present invention will be described with reference to the drawings.

The drawings show an embodiment of the present invention. FIG. 1 is an explanatory diagram before washing with water and FIG. 2 is an explanatory diagram after washing with water.

Process In the present invention, first, the water-soluble resin (2) is partially printed on the substrate (1). Then, an ink containing a water-absorbent resin is printed on the water-soluble resin layer (2) to form a water-absorbent resin layer (3). The water-absorbent resin layer (3) needs to be formed on the water-soluble resin layer (2), but it does not have to match the water-soluble resin layer (2). For example, the right half of FIG. As shown in, the water-soluble resin layer (2) may be formed in a narrower range.

Then, a printing ink (4) containing a colorant is printed if necessary. As shown in FIG. 1, the printing ink (4) may be printed so as to cover the ends of the water-soluble resin layer (2) and the water-absorbent resin (3).

After that, a metal vapor deposition layer (5) is provided on the entire surface, and the structure shown in FIG. 1 is obtained.

This can be washed with water to partially form a metal vapor deposition layer (5) as shown in FIG. As shown in the right half of FIG. 2, the printing ink layer (4) is replaced with the water-soluble resin layer (2).
When printing is performed so as to cover the end portions of the ink, a metal vapor deposition layer (5) and an ink layer (4) are completely matched (patterns are cut out).

The partial vapor deposition layer (5) thus obtained can be further subjected to an appropriate treatment. For example, a varnish for surface protection can be applied or an adhesive can be applied.

As will be described later, when this is used as a transfer foil, it is usual to apply an adhesive on this partial vapor deposition layer (5).

Substrate (1) Any substrate can be used. Besides a synthetic resin film or sheet of polyethylene, polypropylene, polyester, etc., a three-dimensional molded product may be used. When a transfer foil as disclosed in Japanese Utility Model Publication No. 53-21124 is used, a peelable film or a peelable film coated with a varnish can be used.

Water-soluble resin (2) As the water-soluble resin, various polymers such as polyvinyl alcohol, cellulose-based and starch-based can be used, and printing can be performed by gravure printing.

Water-absorbent resin layer (3) The water-absorbent resin is a resin that swells tens to hundreds of times by absorbing water, and various resins such as starch-acrylic acid-based and starch-acrylonitrile-based resins are known. Dissolving Aquaprene L-710 (manufactured by Meisei Chemical Industry Co., Ltd.)
Etc. are desirable. This resin can be printed by a gravure printing method after being dissolved or dispersed in an organic solvent.

Printing ink layer (4) Any printing ink may be used, and printing can be performed by various printing methods such as a gravure printing method, an offset printing method, a letterpress printing method, and the like.

Further, although an example in which printing ink is printed before vapor deposition is shown in the drawings, it is also possible to print after vapor deposition and before washing with water.

Metal-deposited layer (5) Examples of the metal to be deposited include aluminum, tin, silver, copper, indium, and iron.
It may be formed with a film thickness of 00Å.

Washing with water Washing with water may be carried out by immersing in water at room temperature to about 60 ° C for about 5 seconds to 5 minutes. The unnecessary part is removed by rocking slightly while soaking if necessary.

Subsequent Step As described above, the partial vapor deposition layer thus obtained can be subjected to an appropriate treatment, but it is necessary to apply an adhesive agent on this when forming a transfer foil. (At this time, needless to say, it is necessary to use a peelable film or a peelable film coated with varnish as the substrate).

As the adhesive, an adhesive suitable for the transferred material may be used, and an appropriate pressure sensitive type or heat sensitive type may be used.

<Effect> The present invention is as described above. Since the water-absorbent resin expands due to the penetration of water and rapidly diffuses while destroying the vapor deposition layer and the printing ink layer, and dissolves the water-soluble resin layer, This has an effect that the vapor deposition layer can be processed into an image with high accuracy. In particular, when it has a printing ink layer, it has an effect that the pattern of the ink layer and the vapor deposition layer can be cut out.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an explanatory diagram before washing with water and FIG. 2 is an explanatory diagram after washing with water. (1) ... Substrate, (2) ... Water-soluble resin layer (3) ... Water-absorbent resin layer, (4) ... Printing ink layer (5) ... Metal deposition layer

Claims (1)

[Claims] 1. A water-soluble resin is printed on an arbitrary basis, and an ink containing a water-absorbent resin is printed on the water-soluble resin layer.
After the metal vapor deposition layer is provided on the entire surface, it is washed with water, and the water absorption expansion of the water-absorbent resin destroys the vapor deposition layer to promote water penetration and dissolves the water-soluble resin. A method for forming a partially vapor-deposited layer, which comprises removing the water-absorbent resin layer and the metal vapor-deposited layer.