JPS6027039Y2 - transfer foil - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transfer foil having excellent chemical resistance and high quality metallic luster.

Conventionally, there are many types of transfer foils with metallic luster.For example, a release layer, a colored layer, a metal vapor deposited layer, and an adhesive layer are laminated in this order on one side of a base sheet, or a base release layer is made of metal powder. Laminated bodies of adhesive layers are known.

Although those using vapor deposition are extremely superior in terms of gloss, they have the drawbacks of being very weak against chemicals, lacking in three-dimensional effect, and being expensive.

Furthermore, conventional products using metal powder lack metallic luster and, in fact, have a poor metallic feel, so there are also products in which pearl pigments are mixed in with the metal powder.

However, even in this case, the metallic luster increases to some extent, but the coexisting metal powder has poor translucency, so the unique pearlescent luster of the pearl pigment is blocked, making it impossible to fully demonstrate the effect of the pearl pigment. Can not.

In addition, the metal powder itself is highly resistant to acidic or alkaline chemicals. Even with foil mixed with pearl pigment and metal powder, the surface of the transferred foil is protected by a release layer, but due to the chemicals that have soaked into it. Causes significant discoloration.

As a result of various studies to solve the above-mentioned drawbacks, this invention has a structure in which the resin layer containing metal powder is covered with a waterproof resin layer containing pearl pigment. We have discovered that the pearlescent luster of the pigment is not impaired at all, and that chemicals are less likely to penetrate into the metal powder layer, which is weak against chemicals, resulting in a marked improvement in chemical resistance.

The present invention was made based on this knowledge.

That is, the gist of the present invention is to provide a transparent mold release layer that can be peeled off from the film on one side of a base film, and then provide at least one layer made of a chemical-resistant pearl pigment and a waterproof resin,
The transfer foil further has a thermoplastic resin layer containing metal powder thereon.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a transfer foil 5 according to the present invention.

A transparent release layer 2 that can be peeled off from the film is provided on one side of the base film 1, and on top of that, at least one layer 3 made of a chemical-resistant pearl pigment and a waterproof resin is provided. At least one layer 3 made of a chemical-resistant pearl pigment and a waterproof resin is provided, and a thermoplastic resin layer 4 containing metal powder is further provided thereon.

Here, the thermoplastic resin layer 4 is a layer that is thermally bonded to the transfer target.

In the transfer foil according to the present invention, the base film may be any film that can withstand the temperature and pressure applied during transfer, such as paper, cellophane,
Polyester film etc. can be used and can be arbitrarily selected depending on the purpose.

Next, as the transparent mold release layer that can be peeled off from the film, various hard resins, polyamide resins, polyester resins,
Acrylic resins, various rubber-based resins, various vinyl-based resins, and the like can be used, but resins that can be easily peeled from the base film and are difficult for moisture to pass through are preferred.

Next, a layer consisting of a chemical-resistant Burl pigment and a waterproof resin prevents chemicals that have passed through the release layer from reaching the metal powder layer.

Here, as the pearl pigment, it is preferable to use a chemical-resistant pearl pigment that does not cause discoloration of the pearl pigment itself due to the influence of the chemical when the chemical penetrates through the release layer. A pearl pigment obtained by coating a chemical resistant compound such as titanium oxide on the pigment is preferred.

On the other hand, conventionally used lead carbonate, lead arsenate foils, etc. are not very effective in terms of chemical resistance and are not suitable as constituent materials for the transfer foil of the present invention.

Next, as the waterproof resin, for example, one kind or a mixture of various rubber resins, acrylic resins, cellulose resins, vinyl IIt resins, etc. can be used.

The thicker the layer made of the chemical-resistant pearl pigment and the waterproof resin, the greater the effect; for example, in gravure printing, the more two or three layers are stacked, the greater the effect.

Next, as the resin for the thermoplastic resin layer containing metal powder, any resin having a softening point of about 50 DEG C. to 200 DEG C., for example, acrylic resin, vinyl resin, etc., can be used.

The metal powder can be, for example, fine powder of aluminum, brass, copper, silver, etc., and can be arbitrarily selected depending on the purpose.

Next, a detailed explanation will be given by giving examples and comparative examples.

Example: A vinyl chloride resin solution was applied uniformly to a thickness of about 5μ on the surface of a polyester film (manufactured by Toshisha Co., Ltd.) with a thickness of 25μ, and after drying, pearl ink having the following composition was applied to the surface to a plate depth of 40μ.
It was made into a solid gravure version and coated twice.

Next, the coated surface was uniformly coated with an ink containing a thermoplastic resin having the following composition using a gravure solid plate of 60 μm to obtain a transfer foil of the present invention.

[Pearl ink]

Chlorinated rubber 25 parts Pearl pigment ω 25 parts Ethyl acetate
25 parts toluene
25 parts ω mica flakes coated with titanium oxide [Adhesive layer ink] Acrylic resin 3 (2) Fine aluminum powder 25 parts Methyl ethyl ketone
25 parts toluene
S [Using the above transfer foil, it was transferred to an ABS resin plate, and an IOR immersion test was conducted in a 10% hydrochloric acid aqueous solution and a 10% sodium hydroxide aqueous solution, but no discoloration was observed.

Comparative Example A polyester film was coated with vinyl chloride resin in the same manner as in the example, but the following composition ink was coated uniformly on a gravure solid plate with a plate depth of 40μ, and the resulting transfer foil was transferred to an ABS resin plate. The chemical resistance was tested in the same manner as in the examples.

As a result, the aluminum powder was attacked by the chemicals and showed significant discoloration.

〔ink〕

Acrylic resin 30 parts Pearl pigment (2) 15 parts Aluminum fine powder
15 parts methyl ethyl ketone
2-width toluene 2 (2
) ω mica ultra-thin flakes coated with titanium oxide As explained above, the transfer foil of the present invention uses it to transfer a transfer layer that has excellent metallic luster, is rich in chemical resistance, and does not discolor. This is extremely meaningful in practical terms.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a transfer foil according to the present invention. DESCRIPTION OF SYMBOLS 1...Base film, 2...Transparent release layer, 3...Layer consisting of chemical-resistant Burr pigment and waterproof resin, 4... Thermoplastic resin layer containing metal powder.

Claims (1)

[Scope of utility model registration request] A transparent release layer 2 that can be peeled off from the film is provided on one side of the base film 1, and at least one layer 3 made of a chemical-resistant pearl pigment and a waterproof resin is further provided thereon, and further contains metal powder thereon. thermoplastic resin layer.