JPS5926474B2 - Method for producing metallized transfer foil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a metal vapor-deposited transfer foil, and relates to a transfer foil provided with an ink pattern and a pattern-like metal vapor-deposited layer.

As a transfer foil having such a patterned metal vapor deposited layer, for example, a method is known in which a water soluble resin is partially applied, metal vapor deposition is performed, and the metal vapor deposit layer is washed off together with the water soluble resin by washing with water. However, it was difficult to print delicate patterns with water-soluble resin, and it was not possible to obtain a metal vapor deposited layer with a precise pattern.

An object of the present invention is to provide a method for manufacturing a transfer foil that does not have the above-mentioned drawbacks. That is, the present invention provides (
” A release layer is provided on one side of the heat-resistant sheet, then a pattern layer is provided by printing the desired pattern with translucent or opaque ink, and (b) a transparent or translucent colored water-soluble layer and this A transparent or translucent colored vapor-deposited protective layer containing an additive that acts on the water-soluble layer to reduce its solubility is formed on the entire surface or partially in any order, and then the entire surface is covered with metal. A vapor deposited layer is provided, the parts without the protective layer are washed away with water, and an anchor layer is provided to increase the adhesion between the metal vapor deposited layer and the adhesive layer if necessary, and then an adhesive layer is provided. This is a method for manufacturing a metal vapor-deposited transfer foil.

The present invention will be described below with reference to the drawings.

The film base material 1 used may be a heat-resistant and water-resistant film such as polyester.

A release layer 3 is provided on this film base material using a resin having weak adhesiveness to the film base material. This layer may be transparent or colored. For this reason, resins include thermoplastic methacrylic acid resins, copolymers of this resin with styrene and acrylic acid, vinyl chloride and vinyl acetate copolymers,
Cellulose derivatives such as chlorinated polyolefins, chlorinated rubber, cyclized rubber, cellulose acetate butyrate, and nitrocellulose are useful. Also, two or more of these may be used in combination. In order to improve the releasability of these release layers, if necessary, a release aid layer 2 may be provided on the film base material 1 in advance, and then a release layer 3 may be provided.

As this peeling aid layer 2, wax, fatty acid amide, silicone, etc. 1 may be applied thinly, or 5 to 90% of these auxiliary agents may be added to a resin that can be used for the release layer.
After printing a pattern required as a pattern layer 4 with transparent colored ink or opaque colored ink, a water-soluble layer 5 which is entirely or partially transparent or translucently colored is provided. The water-soluble layer is a resin that easily dissolves in water, such as polyvinyl alcohol, acrylic resin, polyethylene imine, cellulose derivatives, starch, etc., and the solubility of the resin can be reduced by additives. It is dissolved in a mixed solvent with a water-soluble solvent such as acetone or alcohol, and if necessary, a water-soluble dye or a water-insoluble pigment is added and applied (first step).
figure). Next, the pattern layer 4 and the water-soluble layer 5 are protected from the heat during metal vapor deposition, the adhesion with the vapor-deposited metal is improved, and the water-soluble layer is protected from dissolving during the next process of washing with water. A vapor deposition protective layer 6 is provided as a layer to leave the metal vapor deposited layer only in the areas where it is required.

(Fig. 2) This vapor-deposited protective layer 6 acts on the water-soluble layer 5,
Additives are added that reduce the solubility and improve the adhesion between the vapor-deposited protective layer 6 and the water-soluble layer 5.

The vapor-deposited protective layer 6 containing this additive reduces the solubility inside the layer due to the surface of the water-soluble layer 5 and the penetration of the additive into the inside of the water-soluble layer. It is possible to wash the transfer sheet stably with water without dissolving the necessary parts), and it is also possible to improve the water resistance and chemical resistance of the product that has been transferred from the transfer sheet to the object to be transferred. . Resins used for the vapor deposition protective layer include synthetic resins such as alkyd, phenol, vinyl, epoxy, acrylic, hydrocarbon, urethane, polyether, butyral, and silicon;
Cellulose derivatives such as nitrocellulose and ethylcellulose are effective, and two or more of these resins may be appropriately mixed and used.

In addition, aminoalkyds that undergo crosslinking reactions by heating and drying,
Using epoxy melamine, phenol, amino resin, etc. or polyurethane that undergoes a crosslinking reaction using a reactive agent,
These resins may be coated and heated at 80 to 220° C. for 3 to 50 seconds to perform reaction curing to form the protective layer 6.

Additives that reduce the solubility of the water-soluble layer include crosslinking agents with aldehyde groups, carboxylic acid groups, isocyanate groups, activated vinyl groups, epoxy groups, etc., aluminum chloride,
Inorganic crosslinking agents such as alkyl titanium and boric acid are effective.

In order to promote the reaction between these additives and the water-soluble layer, after applying the vapor-deposited protective layer, it is kept at a temperature of 30 to 50 °C for 1 day to 50 °C.
Store for 7 days or at 80-220℃ for 3-4 days.
It is effective to heat the print for 0 seconds.

As the next step, a metal vapor deposition layer 8 is provided on the entire surface by a vacuum vapor deposition method or the like.

This vacuum deposition may be performed according to a conventional method. Aluminum is the most common vapor-deposited metal, with a particle diameter of 1100 to 800.
Vapor deposition is performed to a thickness of about angstroms, and a metal vapor deposition layer 8 is provided over the entire printing surface.

(Figure 3) Next, the transfer foil is washed with water, water to which a surfactant has been added, and water to which a solvent compatible with water has been added.

The portions where the vapor-deposited protective layer is not coated are removed from the transfer sheet together with the metal-deposited layer 8 as the water that permeates through the metal-deposited layer 8 dissolves the water-soluble layer 5 . For the washing process}
In order to improve the stability of cleaning, the solubility of the surface is reduced by adding an additive that reduces the solubility of the water-soluble layer to the pattern layer 4 and release layer 3 that are in contact with the water-soluble layer 5. In addition, it has excellent adhesion, can be washed with water in a stable manner, and has the effect of improving the chemical resistance of the transferred product. When adding an additive to the release layer, it is preferable to provide a release aid layer to improve release properties. Furthermore, a pattern layer 4 and a water-soluble layer 5
In order to further improve the adhesion, the stability during the washing process, and the chemical resistance of the transferred product, a water-soluble layer 5 is dissolved between the release layer 3, the pattern layer 4, and the water-soluble layer 5. It is also effective to provide entirely or partially a transparent reaction layer 7 containing an additive that lowers the properties (FIGS. 6 and 7). If either the water-soluble layer or the vapor-deposited protective layer is semi-transparently colored, the metal vapor-deposited layer obtained after washing with water will be colored in this color, and the metallic luster pattern obtained after transfer will also be colored. has been done. And there is absolutely no misregistration between the metal vapor deposited layer and the colored layer. Next, if necessary, deposited metal layer 8 and adhesive layer 1
After providing the anchor layer 9 as a layer for adhering to the substrate 0, a heat-sensitive or pressure-sensitive adhesive layer 10 is applied.

As this heat-sensitive and pressure-sensitive adhesive, a resin suitable for the object to be transferred is appropriately used. Vinyl resin as the anchor layer,
Polyamide resins, epoxy resins, maleic acid resins, etc. are effective.For heat-sensitive pressure-sensitive adhesives, when the transfer target is polystyrene resin, for example, chlorinated polyolefin resins and other suitable resins are used for polyolefin resins such as acrylic resins. Use. The transfer sheet manufactured according to the above configuration is heat-pressed onto the object to be transferred, and the film base material 1 is immediately peeled off. Transfer to the object to be transferred. Example A methyl methacrylate resin was coated as a release layer on a polyester film 25cm thick, then a pattern was printed as an ink layer with ink made of nitrocellulose and alkyd resin, to which a color pigment was added, and then a water-soluble layer was applied. Then, as a vapor deposition protective layer, a resin made by adding 5% polyisocyanate to vinyl resin is applied to the area where a metal vapor deposition layer is required, and then aluminum is applied by vacuum vapor deposition method to V) 400. It was deposited over the entire angstrom.

Next, it was washed with water, and the non-printed water-soluble layer of the vapor-deposited protective layer was washed with water to remove unnecessary metal vapor-deposited layers.

After drying the film, a vinyl resin was applied as an anchor layer for adhesive, and then a polymethacrylate resin was applied as an adhesive layer for polystyrene to prepare a transfer sheet. This transfer sheet was transferred to a polystyrene molded product at 220°C and 10 CTn/Sec.
The film was peeled off to obtain a transferred product that partially had a metalized luster.

[Brief explanation of the drawing]

The drawings show examples of the present invention, and FIGS. 1 to 7 are cross-sectional views of a transfer sheet during the transfer sheet manufacturing process. 1... Film base material, 2... Peeling aid layer, 3...
Peeling layer, 4... shell layer, 5... water-soluble layer, 6... vapor deposition protective layer, 7... reaction layer, 8... metal vapor deposition layer, 9...
... Anchor layer, 10... Adhesive layer.

Claims (1)

[Claims] 1. (a) A release layer is provided on one side of the heat-resistant sheet, and then a pattern layer is provided by printing the required pattern with translucent or opaque ink, and (b) a transparent or translucent A colored water-soluble layer and a transparent or translucent colored vapor-deposited protective layer containing an additive that acts on this water-soluble layer to reduce its solubility are formed on the entire surface or in part in any order. (c) Next, a metal vapor deposited layer is provided on the entire surface, and the parts without the protective layer are washed away with water, and (d) an anchor layer is provided to increase the adhesion between the metal vapor deposited layer and the adhesive layer as necessary. 1. A method for producing a metallized transfer foil, comprising: after applying the adhesive layer, an adhesive layer is provided. 2. The manufacturing method as described in 1 above, wherein the release layer contains an additive that acts on the water-soluble layer to reduce its solubility. 3. The manufacturing method according to item 1 or 2, wherein the pattern layer contains an additive that acts on the water-soluble layer to reduce its solubility.