JPH06286396A - Transfer film - Google Patents

Abstract

PURPOSE:To obtain a plastic molded form having excellent adhesive properties, abrasion resistance and chemical resistance and a metallic machining tone by successively forming an irregular pattern shaping layer formed of an ionizing radiation curable resin, a peel ply, a metallic deposit layer and an adhesive layer on one surface of a base material film. CONSTITUTION:One surface of a base material film 1 is coated with an ultraviolet curing type resin, and an irregular pattern is formed on the resin surface by using a block with an irregular pattern having a metallic machining tone, and cured by applying ultraviolet rays by a high-pressure mercury lamp, thus forming a shaped film A, to which an irregular-pattern shaping layer 2 is shaped. The upper section of the irregular pattern layer 2 is coated with an acrylic resin release liquid and a peel ply 3 is formed, and aluminum is deposited into the peel ply 3, thus shaping a metallic deposit layer 5. The metallic deposit layer 5 is coated with acrylic resin adhesives and an adhesive layer 7 is formed, and an obtained transfer film is transferred onto a body to be transferred 8. The shaped film A is peeled, thus acquiring the molded form of a polystyrene resin, to which a deposit transfer pattern layer B is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer film, and more particularly to a thermal transfer film having a vapor-deposited transfer pattern layer having a three-dimensional appearance and an excellent metallic tone, which is applied to plastic molded products, natural wood products and inorganic molded products.

[0002]

2. Description of the Related Art Conventionally, the following methods have been known as methods for forming a metallic design. After providing the resist on the metal plate, the pattern is provided by the corrosion method. The surface of the metal plate is polished with a brush to provide a linear pattern. The plastic surface is subjected to easy adhesion treatment and metal vapor deposition or metal plating is applied. The vapor-deposition transfer pattern layer is thermally transferred onto the transfer target through the transfer film.

[0003]

However, in the conventional corrosion method, the resist image formation has many manual elements, so that the industrial product lacks image reproducibility. There are also problems in terms of quality and price, such as the cost of processing the corrosive liquid and safety. Polishing with a brush limits the image to be formed to a linear shape, lacks reproducibility of the pattern, and
The metal vapor deposition or plating applied to the plastic surface gives a metallic luster to the mirror surface, but unevenness in the uneven surface or rough surface easily causes uneven gloss, and there is a problem that adhesion and abrasion resistance are lacking. . The method of thermally transferring the vapor-deposited transfer pattern layer to the transfer target through the transfer film has a problem in that the transfer film contains a hard metal film and thus the film at the end portion is poorly cut.

According to the present invention, a vapor-deposited transfer pattern layer having a high-grade metalworking tone is heat-transferred onto a transfer-receiving member through a transfer film on a plastic molded product, and the transfer pattern has adhesiveness, abrasion resistance, and It is an object of the present invention to provide a transfer film which is manufactured to have excellent chemical resistance.

[0005]

In order to achieve the above object, the transfer film of the present invention comprises an uneven pattern-forming layer and a release layer formed of an ionizing radiation curable resin on one surface of a base film. , If necessary, provide a heat-resistant resin layer,
The metal vapor deposition layer and the adhesive layer are sequentially provided. Then, the metal vapor deposition layer may be partially applied.

The uneven pattern-imparting layer referred to in the present invention is formed by a precision line or an abstract pattern. Then, the pattern drawn by the precision lines is composed of parallel straight line groups P3 and / or curve groups P4 that do not intersect in a plurality of closed curve regions P2 surrounded by the closed curve P1 as shown in FIG. It is something.

The base film of the transfer film of the present invention is
A single or laminated film composed of the following materials. Polyester resin such as polyethylene terephthalate,
A film or sheet formed from a polyamide resin such as 6-nylon, a polyvinyl chloride resin, an acrylic resin such as polymethylmethacrylate, a polypropylene resin, cellulose triacetate, or a derivative of a fibrin such as cellophane. Metal foil such as copper, iron and aluminum. paper.

The uneven pattern-imparting layer provided on the base film is
When thermally transferred from a transfer film to a transfer target, a vapor deposition transfer pattern layer having a concavo-convex pattern without being thermally deformed is applied to the transfer target and then left on the base film. Therefore, at the same time as having heat resistance, the base film,
It is preferable that they are strongly bonded. Ionizing radiation curable resins are preferable as those capable of meeting this purpose, and known ultraviolet curable resins and electron beam curable resins such as prepolymers having a polymerizable unsaturated bond or an epoxy group in the molecule. The composition which mixed the polymer, the oligomer, and / or the monomer is mentioned. These prepolymers,
Examples of the oligomer include unsaturated polyesters that are condensation products of unsaturated dicarboxylic acids and polyhydric alcohols, methacrylates such as polyester methacrylates, and acrylates such as epoxy acrylates. Further, as the above-mentioned monomer, styrene-based monomers such as styrene, acrylic acid-2
-Acrylic acid esters such as ethylhexyl, methacrylic acid esters such as lauryl methacrylate, substituted amino alcohol esters of unsaturated acids such as 2- (N, N-diethylamino) propyl acrylate, 1,6 hexanediol diacrylate And other polyfunctional compounds and / or polythiol compounds having two or more thiol groups in the molecule, such as trimethylolpropane trithioglycolate.

The monomer is selected so as to have dimensional stability during the curing reaction by irradiation with ionizing radiation so that the shape of the uneven pattern-imparting layer can be stably formed. For example, a monofunctional acrylate such as phenoxyethyl acrylate,
There are monomers such as difunctional acrylates such as 1,6 hexanediol and trifunctional or higher functional acrylates such as dipentaerythritol hexaacrylate. Further, the above compound is added with a polymerization inhibitor such as hydroquinone monomethyl ether in order to prevent the compound from being cured before irradiation with ionizing radiation. Further, in order to cure these compositions with visible light or ultraviolet rays, it is possible to add a photopolymerization initiator of acetophenones or benzophenones or a photosensitizer of amines.

Ionizing radiation is one of electromagnetic waves or charged particle beams that has the ability to ionize a substance. What is industrially used is visible light, ultraviolet light, or electron beam. Besides, X-rays, β-rays, etc. can also be used.

The uneven pattern-imparting layer according to the present invention is formed by a precision line or an abstract pattern. As shown in FIG. 5, the pattern drawn by the precision lines is a line of a constant period drawn in the same direction, a group of parallel straight lines drawn in a closed curve region, and / or configured. It is a thing. If the depth is set to 2 to 10 μm, the thickness of the peeling layer can be set to 1 to 7 μm, and there is an effect that film breakage during transfer is good.

The material and the coating method are selected in consideration of the fact that the peeling layer for forming the concavo-convex pattern serves as a protective layer for the vapor deposition transfer pattern layer and at the same time affects the gloss of the surface. As the material, either a thermosoftening resin or a curable resin can be selected. For example, acrylic resin, vinyl chloride / vinyl acetate copolymer, fibrin derivative, chlorinated rubber, cyclized rubber, polyvinyl butyral, polyurethane, epoxy silicon resin, linear polyester resin, etc., with antioxidants and stains due to foreign substances Examples of the antistatic agent include a varnish composed of an antistatic agent and a wax that modifies the surface property. The release layer, which is made of a curable resin or a heat-resistant resin composition, preferably has a thin coating amount of 2 g / m ² (solid content) or less in order to improve film cutting. On the contrary,
When the heat-softening resin is used as the release layer, the edge portion is cut off at the temperature at which the heat transfer is performed from the transfer film, so the coating thickness can be increased to 3 to 5 g / m ² (solid content).

The coating of the peeling layer is performed by completely filling the concave portion so that the fine concavo-convex pattern layer can be reproduced reliably.
Care should be taken to provide a smooth coating surface so as not to hinder the gloss of vapor deposition. The coating method therefor is reverse coating such as gravure reverse or slit reverse, bar coating, or direct coating with a rubber roll.

A transparent or colored heat-resistant resin layer may be provided on the surface of the release layer in accordance with requirements such as excellent surface physical properties such as abrasion resistance and solvent resistance, printing of a pattern, and creation of a colored metallic tone. is there. This heat-resistant resin layer does not merely have the function of coloring, but it has the function of a primer that stabilizes the adhesion to the metal to be deposited, the gloss of the deposition, and the physical surface properties such as increasing the hardness of the transfer film. It greatly contributes to the improvement of. It also serves as a corrosion-resistant layer of an aluminum vapor deposition film that is chemically unstable and easily deteriorates. Further, this heat resistant resin layer is preferably provided on the release layer made of a heat softening resin. The heat resistant resin layer has a function as a medium for strengthening the adhesion between the peeling layer and the metal vapor deposition layer. In addition, it is possible to prevent the vapor-deposited layer transfer pattern having a fine uneven pattern composed of two layers of a heat-softening resin and a heat-resistant hard resin from flowing or deforming due to heat and pressure during heat transfer. It has the effect of faithfully reproducing the surface shape. Application of heat resistant resin layer,
It can be performed by reverse coating such as gravure reverse and slit reverse, bar coating, and direct coating with a rubber roll, but reverse coating is preferable for forming a coated surface without defects such as pinholes. Further, for the purpose of simplifying the process, the release layer and the heat-resistant resin layer can be formed in the same process using a gravure printing machine or a multi-head coater.

As this material, the ionizing radiation-curable resin used for forming the uneven pattern-imparting layer can be used. And, in addition, acrylic acid esters, homopolymers of methacrylic acid esters, or copolymers of these monomers, styrene resins, nitrocellulose, cellulose acetate, cellulose derivatives such as cellulose acetate butyrate, derivatives such as rosin ester, Vinyl chloride / vinyl acetate copolymer,
Polyvinyltoluene resin, polyvinyl butyral resin,
Polyurethane resin, polyester resin having a high Tg, shellac, gum arabic, acaloid, mastic, etc., or a mixture of two or more thereof.

For the colored layer, the transparent colored layer is made of a material containing a colorant such as an inorganic pigment, an organic pigment or a dye, as well as an inorganic extender or an organic filler. The metal vapor deposition layer can be formed by vacuum vapor depositing a metal such as aluminum, tin, silver, copper, or chromium in a range of 4 to 600 Å.

The metal vapor deposition layer can be used not only on the entire surface but also on the entire surface, which is partially vapor deposited by the following method. The partial vapor deposition can be performed by a known method. After applying a concavo-convex pattern-forming layer, a release layer, and if necessary a heat-resistant layer to the base film, a pattern is formed with a water-soluble varnish, a metal vapor deposition film is formed on the entire surface of the film including the pattern, and it is not necessary with the pattern. Partial vapor deposition method, in which the vapor-deposited film in the unnamed part is washed away with water and metal deposition is left only in the non-patterned part. After applying a concavo-convex pattern-forming layer, a release layer, and if necessary a heat-resistant layer on the base film, a vapor-deposition film is formed, and then a chemical-resistant varnish or ink is used to form a resist film on the vapor-deposition part that requires metallic luster. A partial vapor deposition method that prints and dissolves and removes a metal vapor deposition film that is not provided with a resist with acid or alkali, leaving metal vapor deposition on the pattern portion. In the present invention, it does not matter which method the partial vapor deposition method is adopted.

The adhesive layer is a material for transferring and adhering the vapor deposition transfer pattern layer to the transfer target. Then, the same material as the adhesive used for this type of transfer foil can be used. For example, acrylic resin, styrene resin, polyvinyl chloride / vinyl acetate copolymer, polyvinyl butyral resin,
Examples thereof include polyurethane resin, epoxy resin derivative, polyester resin and the like. In any case, it depends on the material of the non-transfer member.

[0019]

As described above, an image composed of parallel straight lines and / or curved lines drawn in a precision line in a plurality of closed curve regions and not intersecting each other is formed on a plate surface having a depth of 2 to 10 μm. Composed. Then, by using the ionizing radiation curable resin having excellent heat resistance, the uneven pattern-imparting layer of the transfer film composed of the above plate works so as to have an uneven pattern having a depth of 1 to 7 μm. Then, the release layer is a thermosoftening resin layer,
Alternatively, the vapor-deposition transfer pattern layer including a heat-softening resin layer, a heat-resistant resin layer, an adhesive layer, a metal vapor deposition layer, and an adhesive layer has good suitability for film breakage during thermal transfer. Therefore, it is possible to express an abstract pattern excellent in various resistance of the vapor deposition transfer pattern layer and a high-grade metallic design.

[0020]

EXAMPLES Next, examples of the transfer film in the present invention will be described. (Example 1) Polyethylene terephthalate film (Teijin Ltd.)
Made: HP-7) 25 μm as the base film 1, and UV curable resin (PEX808-1 made by Dainichiseika Co., Ltd.) by gravure reverse coating, coating amount at dry time 3 g /
m ^{2 is} applied, the uneven surface pattern is formed on the resin surface using a plate having an uneven pattern of metalworking tone, irradiated with 160 W / cm high pressure mercury lamp × 4 lights at a running speed of 20 m / min, and cured. Thus, the uneven pattern-imparting layer 2 was formed. An acrylic resin-based release liquid (Showa Ink Mfg. Co., Ltd .: Primer J) was applied onto the uneven pattern layer by gravure reverse coating to form a release layer 3 having a dry coating amount of 3 g / m ² . Aluminum was vapor-deposited 6 to a thickness of 500 Å on the surface of the release layer obtained in 1. Further, an acrylic resin adhesive (HS, manufactured by Showa Ink Mfg. Co., Ltd.) was applied to the vapor deposition surface by gravure reverse coating to provide an adhesive layer 7 by applying a dry coating amount of 3 g / m ² . The obtained transfer film was transferred onto a molded product of polystyrene resin, which is the transferred material 8, under roll conditions of 200 ° C. and 2 m / min, the patterning film A was peeled off, and the vapor deposition transfer pattern layer B was applied. A polystyrene resin molded product was obtained.

Example 2 Polyethylene terephthalate film (Teijin Ltd.)
Made: HP-7) with a thickness of 25 μm as the base film 1,
UV curable resin varnish (Dainichi Seika Co., Ltd .: PEX8)
08-1) is applied by gravure reverse coating at a coating amount of 3 g / m ² at the time of drying, and the resin surface is embossed with a plate having an uneven pattern of metalworking tone, 160 W / cm high pressure mercury lamp x 4 lamps At a running speed of 20 m / min to form a concave-convex pattern imprinting layer 2. An acrylic resin-based release liquid (Showa Ink Mfg. Co., Ltd .: Primer J) was applied onto the uneven pattern layer by gravure reverse coating to form a release layer 3 having a dry coating amount of 3 g / m ² . A UV-curable resin varnish (PEX808-1 manufactured by Dainichiseika Co., Ltd.) was applied to the release layer surface by gravure reverse coating at a dry coating amount of 2 g / m ² to form a heat-resistant resin layer 4.
Was set up. A water-soluble varnish (Showa Ink Mfg. Co., Ltd .: water-based varnish M) was used on the surface of the heat-resistant resin layer, and a pattern was printed by gravure printing on the portion corresponding to the non-deposited portion of the transfer film to provide the water-soluble resin layer 5. . Aluminum was vapor-deposited 6 to a thickness of 500 Å on the entire surface of the film including the pattern obtained in 1. Further, the aluminum vapor deposition surface was washed with water to obtain a partially vapor deposited film having non-evaporated portions (51 and 61) in which the water-soluble pattern and the aluminum vapor deposition were removed. Acrylic resin adhesive (HS manufactured by Showa Ink Kogyo Co., Ltd.) is applied by gravure reverse coating on the entire surface of the film including the partially vapor-deposited film obtained in step 4 to apply an application amount of 4 g / m ² at the time of drying to form an adhesive layer and transfer the film. I got a film. The obtained transfer film was transferred onto a polystyrene resin molded product under roll conditions of 200 ° C. and 2 m / min, and the film was peeled off to obtain a polystyrene resin molded product provided with a partial vapor deposition transfer pattern layer.

[0022]

Since the present invention is constructed as described above, it has the following effects. The vapor-deposition transfer pattern layer is a group of parallel straight lines drawn in multiple closed curve areas drawn with precision parallel lines using a precision parallel line pattern using ionizing radiation curable resin with excellent heat resistance. , And / or an image composed of a group of curves,
It works so as to form an uneven pattern of 7 μm. The vapor-deposition transfer pattern layer composed of a release layer made of a heat-softening resin, a heat-resistant resin layer, and a metal vapor-deposited layer has good suitability for film breakage during thermal transfer. Therefore, an abstract pattern and a high-grade metallic design were obtained. In addition, since the metal vapor deposition film of the molded product is protected by the peeling layer and, if necessary, the resin layer, it has excellent properties such as hardness, abrasion resistance and chemical resistance. .

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a cross section in which a vapor deposition transfer pattern layer is transferred from a transfer film of the present invention to a non-transfer member.

FIG. 2 is a sectional view of a transfer film of the present invention.

FIG. 3 is a cross-sectional view of a transfer film provided with a heat resistant resin layer of the present invention.

FIG. 4 is a cross-sectional view of a transfer film provided with partial vapor deposition of the present invention.

FIG. 5 is an example of a concavo-convex pattern formed by a group of straight lines and / or a group of curves drawn in a plurality of closed curve regions.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base film 2 Concavo-convex pattern imprinting layer 3 Release layer 4 Heat-resistant resin layer 5 Water-soluble resin layer 51 Elution part of water-soluble resin layer 6 Metal deposition layer 61 Elution part of metal deposition layer 7 Adhesive layer 8 Non-transfer body A Shaped film B Vapor-deposition transfer pattern layer B1 Vapor-deposition transfer pattern layer containing heat-resistant resin layer B2 Vapor-deposition transfer pattern layer that has been partially vapor-deposited B3 Transfer target with vapor-deposition transfer pattern layer P1 Closed curve P2 Closed curve area P3 Painted in closed curve area Line-shaped straight line group P4 Line-shaped straight line group drawn in the closed curve area

Claims (3)

[Claims] 1. A transfer film comprising a substrate film, on one surface of which an uneven pattern forming layer formed of an ionizing radiation curable resin, a peeling layer, a metal vapor deposition layer, and an adhesive layer are sequentially provided. 2. A transfer film comprising a substrate film, on one surface of which an uneven pattern-imparting layer formed of an ionizing radiation curable resin, a release layer, a heat-resistant resin layer, a metal deposition layer, and an adhesive layer are sequentially provided. . 3. A transfer film, wherein the metal vapor deposition layer according to claim 1 or 2 is partially applied.