JPS63302087A - Metallic-tone thin-film sheet for pressure-sensitive transfer - Google Patents

Abstract

PURPOSE:To prevent wrinkling, lifting or tearing from occurring at the time of transfer onto a non-plane surface, by sequentially providing a release layer, a protective layer, a vapor-deposited metallic layer, an adhesive layer, a specified stretchable resin layer, a pressure-sensitive adhesive layer and a release sheet on a base film in a laminate form. CONSTITUTION:A release layer 1a, a protective layer 2, a vapor-deposited metallic layer 3 and an adhesive layer 4 are provided on a base film 1 in a laminate form. Then, a stretchable resin layer 5 formed of a resin having an elongation at break of 2-300% as measured by a tensile strength and elongation test on a 25-mm sheet, a pressure-sensitive adhesive layer 6 and a release sheet 7 are sequentially provided in a laminate form on the laminate obtained above, thereby producing a metallic-tone thin-film sheet for pressure-sensitive transfer. The stretchable resin may be a nitrile rubber/vinyl chloride resin, a polyolefin thermoplastic elastomer or the like. The thin- film sheet thus obtained is used by releasing the release sheet 7, applying the thin-film sheet to an object with the side of the pressure-sensitive adhesive layer 6 in contact with the object, then pressing the thin-film sheet by a finger or the like, and releasing the base film 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a metallic thin film sheet that can be transferred to any flat or curved surface by pressure-sensitive operation.

Conventional technology A metallic transfer sheet that can be transferred by pressure-sensitive operation (adhesive operation), consisting of a release sheet/pressure-sensitive adhesive layer/synthetic resin film or paper/printing layer formed with ink mixed with gold powder or aluminum powder. A layered structure is known.

In addition, Japanese Patent Application Laid-open No. 57-61592 discloses a release sheet/
A transfer sheet having a layer structure consisting of a protective film/foil stamping layer/adhesive adhesive layer is disclosed.

JP-A-60-172583 discloses an organic resin film containing an antistatic agent/organic polymer film/metal thin film/
A metal thin film transfer sheet having a layer structure consisting of an adhesive layer is disclosed.

Problems to be Solved by the Invention Among the above methods, those in which a surface layer is a printed layer formed with ink mixed with gold powder or aluminum powder have problems in terms of thickness, gloss, color tone, etc. when transferred to an object. This inevitably gives rise to a sense of discomfort or low quality.

In this regard, JP-A-57-61592 and JP-A-60-
The transfer sheet disclosed in Japanese Patent No. 172583 provides a desirable metallic feel. However, these transfer sheets do not cause any problems when transferred to a flat surface or the side surface of a cylinder, but if you try to transfer them to a curved or uneven surface (hereinafter referred to as non-flat surface) that will not become flat even if developed, wrinkles or Lifting or tearing occurs, significantly reducing the appearance. Therefore, there is a disadvantage that the objects to which these transfer sheets are applied are limited.

An object of the present invention is to provide a metallic-like thin film sheet for pressure-sensitive transfer that does not wrinkle, lift, tear, etc. even if it is non-planar, and provides a desirable metallic feel.

Means for Solving the Problems The metallic thin film sheet for pressure-sensitive transfer of the present invention has a base film (1a) having a release property or having a release layer (1a).
)/Protective layer (2)/Metal deposited layer (3)/Adhesive layer (4)
/ stretchable resin layer (5) / pressure sensitive adhesive layer (6) / release sheet (7) in this order, and the stretchable resin layer (5) It is characterized by being made of a resin whose elongation at break in a tensile strength and elongation test is 2 to 300%.

The present invention will be explained in detail below.

FIG. 1 is a sectional view of the thin film sheet of the present invention.

(1) A base film, which either has release properties or is made of a film provided with a release layer.

Examples of the mold release agent when providing the mold release layer (1a) include paraffin wax, silicone, and fluororesin.

As the base film (1), synthetic resin films such as polyester films, polypropylene films, polycarbonate films, non-bonded vinyl films, and polystyrene films, cellulose films, and the like are used. In the case of a synthetic resin film, it is preferable to use a biaxially stretched film. Particularly preferred are
They are a biaxially oriented polyester film and a biaxially oriented polypropylene film.

When producing the base film (1), fillers, stabilizers, colorants, antioxidants, etc. can be added as necessary.

The thickness of the base film (1) is, for example, 4 to 60 lm.
selected from a range of degrees.

(2) is a protective layer. This layer is a metal vapor deposited layer (described later).
3) It is a layer to capture metal vapor during formation, and it is also a layer to protect the metal vapor deposited layer (3) after pressure-sensitive transfer.Furthermore, if overcoating is performed after pressure-sensitive transfer, during the overcoating. It is also a layer that protects the metal base layer (3) and the pressure-sensitive adhesive layer (6) described below.

The protective layer (2) may be either a transparent layer or a colored layer. In the former case, the luster of the vapor deposited metal itself in the metal vapor deposited layer (2) is imparted, and in the latter case, a metallic luster different from the luster of the vapor deposited metal itself is imparted.

This protective layer (2) can have a multilayer structure of two or more layers, such as a transparent layer and a colored layer, or can be a printed layer with an appropriate pattern.

As the protective layer (2), acrylic, urethane, melamine, phenol, urea, diallyl phthalate, polyester, epoxy, alkyd resin, maleated rosin, polyvinyl butyral, cellulose, polyamide, Examples include coating layers of various thermosetting resins or thermoplastic polymers, including vinyl chloride-vinyl acetate copolymers.

The thickness of the protective layer (2) is, for example, 0.5 to 1101L,
In particular, it is set to about 1 to 5 ILm.

(3) is a metal vapor deposition layer. This metal vapor deposited layer (3) is
Vacuum thin film formation method, i.e. vacuum evaporation.

Formed by ion blasting, sputtering, etc.

Examples of metals include aluminum, gold, silver, copper,
Examples include nickel, chromium, titanium, stainless steel, iron, cobalt, molybdenum, rhodium, palladium, gallium, indium, iridium, zinc, tin, tantalum, platinum, etc., and these are used singly, in the form of an alloy, or in a mixture. Aluminum is usually used, and gold is often used for high-end applications, but chromium, Nikel, iron, or alloys of these are often used for applications that are transferred to the exterior of automobiles, motorcycles, etc.

The metal vapor deposition layer (3) may have a two-layer structure in which a certain metal is vapor-deposited and then another metal is vapor-deposited, depending on the case.

The thickness of the metal vapor deposited layer (3) is not particularly limited, but is 100 to
5000 angstroms, especially 120-100
It is often set to 0 angstrom.

(4) is an adhesive layer, which is a layer for adhering the above-mentioned metal vapor deposition layer (3) and the below-mentioned stretchable resin layer (5). The adhesive layer (4) also acts to protect the metallized layer (3).

The adhesive layer (4) includes acrylic, urethane, melamine, phenol, urea, diallyl phthalate, polyester, epoxy, alkyd resin,
Maleated rosin, polyvinyl butyral, cellulose, polyamide, polyvinyl acetate, vinyl chloride
Examples include coating layers of various thermosetting resins or thermoplastic polymers, including vinyl acetate copolymer systems and ketone resin systems.

The thickness of the adhesive layer (4) is often 0.5 to 5 gm.

(5) is a stretchable resin layer. This stretchable resin layer (5)
is required to be made of a resin whose elongation at break in the tensile strength and elongation test of the 25a+m sheet is 2 to 300%, and thus shows some elongation but not excessive elongation. By using a resin layer, the object of the present invention can be achieved for the first time. A particularly preferable range is 5 to 120
%.

Examples of the resin in the stretchable resin layer (5) include:
Nitrile rubber/vinyl chloride resin, nitrile rubber/ethylene-propylene-diene rubber/chlorinated rubber, polyolefin-based thermoplastic elastomer, polyester-based thermoplastic elastomer, polyamide-based thermoplastic elastomer, ethylene-vinyl acetate-based thermoplastic elastomer, polyvinyl chloride-based Among resins such as thermoplastic elastomers and tetrafluoroethylene-propylene rubber, those exhibiting the above-mentioned specific elongation behavior are used.

The thickness of the stretchable resin layer (5) is about 2 to 20IL+1,
In particular, it is preferable to set it as 2-15 grn.

(6) is a pressure sensitive adhesive layer, which is a layer for adhering to an object.

The pressure sensitive adhesive in the pressure sensitive adhesive layer (6) includes natural rubber, butadiene-styrene copolymer rubber, polyisobutylene, polyacrylic acid ester, polyvinyl ether,
The main component is polyisobutyl ether, and if necessary, tackifiers such as rosin, rosin ester, coumaron resin, terpene resin, hydrocarbon resin, oil-soluble phenol resin, fatty acid ester, animal and vegetable oils, wax,
A compound containing softeners such as petroleum heavy distillates, fillers, pigments, anti-aging agents, stabilizers, etc. is used.

The thickness of the pressure sensitive adhesive layer (6) is often 1 to 20 JLrn, especially 1 to 5 gm.

(7) is a release sheet, which serves to protect the pressure sensitive adhesive layer (6) during the distribution process and up to use.

Examples of the release sheet (7) include ordinary release paper treated with release treatment, plastic film treated with release treatment, and the like.

In addition to the above-mentioned layers, other layers such as an anchor coating layer may be added as long as the spirit of the present invention is not impaired.

Among the above layer configurations, the total layer thickness of the protective layer (2)/metal vapor deposited O layer (3)/adhesive layer (4)/stretchable resin layer (5)/pressure sensitive adhesive layer (6) is 40 pm. Hereinafter, it is particularly desirable that the length be 20 m or less. This is because if the layer thickness exceeds 40 μm, a three-dimensional effect will occur when transferred to an object, giving the impression that it is a pasted product.

The metallic thin film sheet for pressure-sensitive transfer of the present invention can be cut (punched) or half-cut in any desired pattern by Thomson.

The object to be transferred is the human body (nails, teeth, ears, arms, etc.)
, textile products (clothing, cloth bags, stockings, etc.), natural or carpentry leather products (bags, handbags, shoes, etc.), plastic products, glass products, ceramic products, vehicles (cars, bites, bicycles, etc.), painted products ( (Buddhist altars, Buddhist altar fittings, musical instruments, etc.), home appliances and indoor equipment (folding doors, sliding doors, picture frames, etc.), small items (fans, stationery, etc.), interior or exterior building materials, packaging containers, display-related products, sports or leisure goods, Almost everything can be mentioned, including shirts, paper products, and food (fruit, etc.).

Function: When using the metallic thin film sheet for pressure-sensitive transfer of the present invention, it is cut into a desired shape using scissors or a cutter. This cutting is omitted when a Thomson cut or half cut is made.

Then, the release sheet (7) is peeled off, the pressure-sensitive adhesive layer (6) side is applied to the object, and the object is pasted and pressed with a finger, nail, or the like. If the object has a flat or cylindrical side surface, it can also be pressed with a roll.

After pressing and rubbing lightly, the base film (1) will come up and be gently peeled off.

After peeling off the base film (1), carefully rub it according to the shape of the object and stretch the transfer piece so that it fits well.

If a transfer piece with a larger area than the object is attached, the excess portion can be easily cut off by rubbing the edge of the object with a fingernail or the like.

The transfer operation is completed with the above operations. If necessary, the transfer piece can be overcoated with various paints such as acrylic, polyester, and urethane paints.

Example Next, the present invention will be further explained with reference to Examples.

Example 1 Silicone release layer (1a) provided on one side, thickness 12I
Methacrylic acid/2-
60 parts of hydroxyethyl methacrylate/butyl acrylate copolymer, 20 parts of tolylene diisocyanate-based polyisocyanate.

Methyl isobutyl ketone/butyl acetate mixed solvent 2
A urethane resin solution containing 0 parts and a small amount of colorant was coated and dried by heating at 120° C. to form a protective layer (2) having a thickness of about IIL11.

Aluminum was deposited on the surface of this protective layer (2) by vacuum deposition to form a metal deposited layer (3) having a thickness of 400 angstroms.

A toluene/methyl ethyl ketone/ethyl acetate mixed solvent solution of acrylic resin/vinyl chloride-vinyl acetate copolymer is coated on top of the metal vapor deposited layer (3).
It was dried at 0° C. to form an adhesive layer (4) with a thickness of about 2 μm.

Next, a tetrahydrofuran/methyl ethyl ketone mixed solvent solution of nitrile rubber/vinyl chloride copolymer was coated on the adhesive layer (4) and dried at 130°C to form a stretchable resin layer (5) with a thickness of 10 ILm. Ta.

Note that the elongation at break of a 25 mm thick sheet obtained by casting the copolymer solution onto a glass plate to form a film was 100% in a tensile strength elongation test.

A solvent solution of an acrylic pressure-sensitive adhesive was coated over the stretchable resin layer (5) and dried at 80°C to form a pressure-sensitive adhesive layer (6) with a thickness of about 3 JLffl.

The pressure-sensitive adhesive layer (6) was covered with a release sheet (7) made of commercially available release paper.

By carrying out the above operations, a metallic thin film sheet for pressure-sensitive transfer, the cross-sectional view of which is shown in FIG. 1, was obtained. The total layer thickness of the layers excluding the base film (1) and release sheet (7) was 17 parts m.

I cut this thin film sheet to a size slightly larger than the nail, peeled off the release sheet (7), stuck it to the nail, and rubbed it lightly.The base film (1) came up, so I gently rubbed it. I peeled it off.

The transfer piece was carefully rubbed and stretched to fit the shape of the nail. The transfer piece was then rubbed along the outer circumference of the nail, and the excess 9 parts were neatly cut off at the outer circumference of the nail. did it. Metal vapor deposited layer (
Even when 3) was visually inspected, no microcracks were observed.

Example 2 A thin film was prepared in the same manner as in Example 1, except that only the addition of a colorant was omitted as the protective layer (2), and the metal vapor deposited layer (3) was a gold vapor deposited layer with a thickness of 400 Å 1 · loam. I created a sheet and transferred it to my nails.

As a result, a more beautiful manicure than in Example 1 was achieved.

Example 3 As the stretchable resin layer (5), Kotril rubber/ethylene-
A thin film sheet was prepared in the same manner as in Example 1, except that a methyl ethyl ketone/tetrahydrofuran mixed solvent solution of propylene rubber was coated and dried at 130°C to form a layer with a thickness of 5 ILm.

- In addition, the elongation at break in a tensile strength elongation test of a 25 mm thick sheet obtained by casting the copolymer solution on a glass plate to form a film was 60%.

The obtained thin film sheet was half-cut into a letter shape using a Thomson, the release sheet (7) was peeled off, and when it was attached to the body of the egg and bites and rubbed lightly, the base film (1) was lifted. So I quietly peeled it off.

When the transfer piece was carefully rubbed against the curved part of the body of the egg and the bites, and the transfer piece was stretched while being stretched to prevent wrinkles from forming, the transfer was completely free of wrinkles, lifting, and tearing. Even when the metal vapor deposited layer (3) was observed with the naked eye, no microcracks were observed.

For the portion transferred to the body of Bites, a urethane paint having a composition of 60 parts of urethane resin, 20 parts of hexamethylene diisocyanate (polyisocyanate), and 40 parts of butyl acetate/methyl isobutyl ketone mixed solvent was added. and dried at 80°C to form an overcoating layer (9) with an average thickness of 20 l.
was formed. This material had excellent weather resistance.

Effects of the Invention The metallic thin film sheet for pressure-sensitive transfer of the present invention can be applied to a non-flat surface (a curved or uneven surface that does not become a flat surface even when developed). Since it deforms accordingly, it does not cause wrinkles, lifting, or tears, and provides a desirable metallic feel without microcracks.

Further, since the transfer piece does not stretch excessively, by pasting a transfer piece with a larger area than the object and then rubbing the edge of the object with a fingernail, the excess portion can be easily cut off and removed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the thin film sheet of the present invention. (1) Base film, (la) Release layer,
(2)...protective layer, (3)...metal vapor deposition layer, (4)
... Adhesive layer, (5) ... Stretchable resin layer, (6)
・・Pressure sensitive adhesive layer, (7) ・・Release sheet

Claims (1)

[Claims] 1. Base film (1) having mold releasability or provided with a mold release layer (1a)/protective layer (2)/metal deposited layer (3)/adhesive layer (4)/stretchable pressure sensitive resin layer (5)/pressure sensitive adhesive layer (6)
/ has a layer structure in which release sheets (7) are provided in this order, and the elastic resin layer (5) has an elongation at break of 2 to 300% in a tensile strength and elongation test of the 25 mm sheet. A metallic thin film sheet for pressure-sensitive transfer, characterized by being formed of a certain resin. 2. The thin film sheet according to claim 1, wherein the stretchable resin layer (5) is made of a resin having an elongation of 5 to 120%. 3. In the thin film sheet, protective layer (2) / metal vapor deposited layer (3) /
Adhesive layer (4) / Stretchable resin layer (5) / Pressure sensitive adhesive layer (
The thin film sheet according to claim 1, wherein the total layer thickness of 6) is 40 μm or less.