JP2623590B2 - Metallized transfer film and method for producing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a metallized transfer film. More specifically, gloss, scratchability, folding,
The present invention relates to a metal-deposited transfer film having excellent printability and the like, and can be used in the fields of stickers, in-molds, and general labels.

(Prior art) Conventionally, a metal vapor-deposited film used for the above-mentioned applications is formed by applying a release varnish to a base film and printing or directly applying a metal vapor-deposited anchor coat agent thereon,
Further, a method is employed in which a metal is deposited thereon and a heat-sensitive adhesive is applied in the last step. The heat-sensitive adhesive is an organic solvent solution type adhesive (acrylic resin, alkyl-phenolic resin, etc.) or an aqueous adhesive (ethylene-vinyl acetate resin, vinyl chloride-based resin, etc.), a roll coater, a gravure coater. And a knife coater. Also, at the time of producing the metal deposition transfer film or
It is also possible to print after lamination with the transfer object.

(Problems to be Solved by the Invention) In the above-mentioned prior art, since the heat-sensitive adhesive layer is generally very thin (1 to 5 μm), when the heat-sensitive adhesive layer is bonded to a transfer-receiving material, scratching, bending, gloss, Poor printability (especially offset printing). In the case of a water-based adhesive, corrosion of metal deposition also poses a problem.

(Means for Solving the Problems) The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, in the above-mentioned vapor deposition transfer film, the adhesive layer was made of a resin having a solid content of 100%. It has been found that the above problem can be solved by using a resin having a thickness of 8 μm or more and a laminating temperature of 250 ° C. or less, and the present invention has been found.

Hereinafter, the present invention will be described in more detail with reference to the drawings. First
As shown in the figure, a first resin layer which is easily peeled off from the base film (1) on one side of the base film (1) having excellent heat resistance and dimensional stability and has excellent adhesion to a metal deposition layer. (2) is applied, and a metal deposition layer (3) is applied thereon to produce a metal deposition laminate. Next, a resin having a solid content of 100% having adhesiveness to both the metal deposition layer (3) and the transfer object, and having a resin thickness of 8 μ or more on the metal deposition layer (3) of the laminated body [second Resin layer (4)] and coated at a processing temperature of 250 ° C. or less.

Further, as shown in FIG. 2, a release varnish (6) may be applied to the base film (1), and a metal deposition anchor agent (7) may be applied thereon.

As the base film (1), an untreated biaxially stretched polypropylene film, an untreated polyester film, etc. excellent in heat resistance and dimensional stability to be used as a carrier film are excellent, and other composite films, co-extruded films, Paper and the like can also be used.

Next, it is necessary that the first resin layer (2) does not peel off when a metal vapor-deposited transfer film is produced, and that the base film (1) is easily peeled off after being bonded to the transfer target. The first resin layer (2) may be transparent or colored. Therefore, as the resin, a nitrocellulose resin, an acrylic resin, a polyurethane resin, a cellulose acetate propionate resin, a cellulose acetate butyrate resin, and the like can be used, and two or more of these can be mixed to improve the releasability and adhesion. It is possible. Alternatively, a release varnish such as an acrylic resin may be applied on the base film (1), and the resin may be applied thereon as a deposition anchor agent.

Next, the metal vapor-deposited layer (3) is formed by vapor-depositing the entire surface with a normal vacuum vapor deposition machine. As metal, aluminum,
Using tin, silver, nickel, etc., vacuum degree 10 ^-3 to 10 ^-6 Pa, 10
A film having a metallic luster is formed by vapor deposition with a thickness of 0 to 1000 °.

Next, the resin having a solid content of 100% to form the second resin layer (4) applied to the metal vapor deposition layer (3) of the metal vapor deposition laminate comprising the layers (1 to 3) is ethylene- One or more of acrylic acid copolymer resin, ethylene-vinyl acetate copolymer resin and its acid-modified product, ethylene-acrylic acid ester copolymer resin and its acid-modified product may be used in combination. Also, tackifiers (rosin, rosin-modified resin, terpene resin, terpene-modified resin, aliphatic hydrocarbon resin, aromatic hydrocarbon resin, ketone resin, cyclized rubber, etc.), wax (paraffin wax, low molecular weight polyethylene, synthetic) Wax, etc.), polyethylene and modified products thereof can be added as appropriate. It is also possible to add an antioxidant, a slip agent, an anti-blocking agent and the like as auxiliary agents.

When the thickness of the second resin layer (4) is less than 8 μm, paper,
When transferred to a porous transfer member such as cloth by heating and pressurizing, the base cannot be sufficiently concealed, so that super gloss cannot be obtained. In addition, scratchability, bending suitability, and printability are poor. The optimum thickness is 10 to 50 μm. Processing temperature 250
When the temperature is higher than 0 ° C., the first resin layer (2) applied on the metal vapor deposition layer (3), the release varnish (6), and the vapor deposition anchor agent (7) do not have heat resistance, so that clouding and cracks occur in metal vapor deposition. Occurs and sufficient gloss cannot be obtained.

Next, the transfer object of the metallized film of the present invention may be a porous substrate such as paper, cloth, wood, or a non-porous substrate such as a film, a sheet, or a molded product.
These may be combined.

In order to transfer the metal-deposited transfer film of the present invention having the above-described configuration to an object to be transferred, the metal-deposited transfer film is superimposed on the object to be transferred, heated, pressed, cooled, and then cooled to a substrate film. There is a method of peeling (1), or a method of supplying the metal vapor-deposited transfer film into a mold of a plastic molding container and peeling the base film after integrally molding with the container.

(Example) <Example 1> On one side of an untreated biaxially stretched polypropylene film having a thickness of 20 µm (manufactured by Tokyo Cellophane Paper Co., Ltd.), a release varnish having the following composition: nitrocellulose resin 14 parts polyurethane resin 6 樹脂 acetic acid 80〃 of ethyl was uniformly applied over the entire surface with a gravure plate having a plate depth of 30μ. Next, an anchoring agent for aluminum deposition having the following composition: acrylic resin 20 parts methyl ethyl ketone 40〃 ethyl acetate 40〃 was applied on a release varnish with a gravure plate having a plate depth of 30μ. Next, on the above aluminum coating anchor coating agent,
Using a vacuum deposition machine, an aluminum deposition layer of 400 mm was formed at a degree of vacuum of 10 ^-4 Pa. Next, on the aluminum vapor deposited layer of the above laminate, the following resin having a solid content of 100%: ethylene-vinyl acetate copolymer 40 parts maleic anhydride-modified ethylene-vinyl acetate copolymer 30% hydrogenated rosin pentaerythritol ester 20 (4) A metal vapor-deposited transfer film was prepared by applying a low molecular weight polyethylene wax (10) using an extrusion coating method at a processing temperature of 220 ° C. and a resin film thickness of 30 μm.

Next, the above metal vapor-deposited transfer film is brought into close contact with 85 g / m ² Sarashi Kraft paper, and a silicon rubber roll having a surface temperature of 150 ° C. is transferred at a pressure of 2 kg / cm ^{2 at} a speed of 5 m / min. The substrate film was peeled off, and offset printing was performed on the upper surface of the peeling varnish.

 The results were all good as shown in Table 1.

<Example 2> Instead of the release varnish and the anchor coating agent for aluminum vapor deposition in Example 1, a resin having the following release function and aluminum vapor deposition anchor function: polyurethane resin 10 parts cellulose acetate propionate resin 10 酢 酸 ethyl acetate The procedure was the same except that 40〃 methyl ethyl ketone 40〃 was uniformly applied over the entire surface with a gravure plate having a plate depth of 30μ.

 The results were all good as shown in Table 1.

<Example 3> A 25μ untreated polyester film was used in place of the untreated biaxially stretched polypropylene film of Example 2, and a 200μ polypropylene sheet was used in place of Sarashi Kraft paper as the transfer object. The procedure was the same except that the silicone rubber roll was used at ℃.

 The results were all good as shown in Table 1.

<Example 4> The metal-deposited transfer film of Example 3 was supplied into a mold of a polypropylene molding container, and the polypropylene resin was heated to 220 ° C.
Injection, pressure 700kg / cm ² , injection time 5
It was molded integrally with the metallized transfer film under the conditions of seconds and a total cycle time of 40 seconds. Thereafter, the base film was peeled off.

 The results were all good as shown in Table 1.

<Comparative Example 1> Instead of the resin having a solid content of 100% in Example 2, an alkyl-
The same procedure was carried out except that the coating film of the phenol resin was changed to 4 μm.

As shown in Table 1, the results were inferior in gloss, scratchability, bending property, and printability, and particularly poorest in print (offset) suitability.

<Comparative Example 2> Instead of the resin having a solid content of 100% in Example 2, ethylene-
The same procedure was carried out except that the vinyl acetate copolymer emulsion was coated at 4 μm.

The results are shown in Table 1, as shown in Table 1.
Bending property, corrosion, printability, and water resistance were poor, and in particular, scratchability, corrosion, and print (offset) suitability were poor.

<Comparative Example 3> The same procedure as in Example 3 was carried out except that the acrylic emulsion was changed to 4 µm in place of the resin having a solid content of 100%.

As a result, as shown in Table 1, the scratching property, the bending property, the corrosion, and the printing (offset) suitability were inferior.

(Evaluation test method) 1) Gloss Reflective gloss was measured using a reflection gloss meter (VG-ID type) manufactured by Nippon Denshoku Co., Ltd. at an incident angle of 60 degrees and a reflection angle of 60 degrees (JISK-
5400 "General Test Method for Paints", section 6-7).

2) Cracks Visually.

3) Clouds Visually.

4) Scratch Based on JISK-5400 “General Test Methods for Paints”, paragraph 6-14,
The test was performed using Mitsubishi UNI Pencil H.

 However, the load was 10 g ± 0.005 g.

5) Bending Fold a 15cm x 15cm sample with its vapor deposition side up, aligning the opposite corners, press firmly with your finger so that the fold is 180 degrees, put it back, and attach cellophane tape to the fold After that, they were slowly peeled off in the 90-degree direction (valley fold). or
A similar test was performed on a 15 cm × 15 cm sample with the deposition surface down (mountain fold). Then, the vapor deposition surface peeled off by the cellophane tape was visually judged.

6) Corrosion Temperature 40 ℃ ± 1 ℃, Humidity 80% ±
It was put in a thermo-hygrostat kept at 1%, taken out after 96 hours, dried at a temperature of 40 ° C. for 30 minutes, and the loss of the deposited metal due to corrosion was visually determined.

7) Printing aptitude Using an RI tester type 2 offset printing machine manufactured by Akira Seisakusho Co., Ltd., printing was performed with New Daicure Z [ultraviolet curable ink manufactured by Dainippon Ink and Chemicals, Inc.]. 80 w /
cm, cured and dried under the conditions of 20m / min.
Adhesion and paper stickiness were determined.

8) Water resistance After immersion in distilled water kept at 25 ° C for 2 hours,
After drying for a while, the presence or absence of blisters, peeling, whitening, and cracks on the deposition surface was visually determined.

(Effect of the Invention) The metal-deposited transfer film of the present invention is superior to conventional metal-deposited paper in scratchability, bendability, printing suitability, etc., and can be freely selected as a transfer-receiving agent, and can control the humidity of paper. Features such as unnecessary are obtained.

[Brief description of the drawings]

1 and 2 are cross-sectional views of a metal deposition transfer film showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Base film, 2 ... Resin layer also serving as peeling and anchoring, 3 ... Metal deposition layer, 4 ... Resin layer made of 100% resin for solid part, 6 ... Release varnish, 7 ... Metal deposition anchor Coating agent.

Claims (3)

(57) [Claims] 1. A substrate film (1), a first resin layer (2) which is easy to peel off from the substrate film and has metal vapor deposition suitability, a metal vapor deposition layer (3), and a second resin layer (4). Is a metal-deposited transfer film sequentially laminated, wherein the second resin layer (4) has a layer thickness of 8 μ or more, and the resin layer is formed of a resin having a solid content of 100%. The above metal-deposited transfer film, wherein the melting temperature of the resin of 100% of the mold is 250 ° C. or less. 2. The metallized transfer film according to claim 1, wherein the first resin layer (2) comprises a release varnish and a metallized anchor coating agent. 3. A metal-deposited resin which is easy to peel off from the film and is applied to one side of a base film, and then a metal-deposited layer is formed on the resin layer to produce a metal-deposited laminate. Melting temperature 250 on the metal deposition layer side of the laminate
A method for producing a metal-deposited transfer film, which comprises applying a resin having a solid content of 100 ° C. or less to a thickness of 8 μ or more.