JPS5919834B2 - Transfer foil base material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer foil base material, and more specifically, it is capable of providing a metallic luster with a multicolor, three-dimensional effect, and a deep pattern, and also has impact resistance, abrasion resistance, and chemical resistance. , relates to a transfer foil base material having excellent ultraviolet aging resistance, etc.

Transfer foil substrates having patterns such as hair lines are already known and have been widely used to give beautiful metallic luster to the surfaces of light electrical products, automobile interior parts, various decorative items, etc. However, in conventional transfer foils of this type, hairline processing is applied to one side of a base film such as a polyester film, and a release agent layer, a colored layer, a metallized film layer and an adhesive are applied on this processed surface. The layers are laminated in this order, and when this transfer foil base material is transferred to the object to be transferred, the pattern pattern on the base film is reproduced on the colored layer, so there is a single layer on the transfer surface. Only a monotonous pattern consisting of colors was produced, and the pattern lacked three-dimensionality and depth. Furthermore, since the base film with the pattern engraved has an uneven pattern, it is difficult to apply the release agent smoothly and uniformly, and as a result, it is difficult to transfer the transfer foil to the object to be transferred. In some cases, the peelability of the base film was poor and delamination occurred within the transfer laminate. In addition, on the surface of the transferred object transferred using the conventional transfer foil as described above, the colored layer is directly exposed to the atmosphere, so damage and deterioration may occur due to impact, friction, chemicals, ultraviolet rays, etc.
The pattern on the surface was often damaged. The present invention has been made in view of the above, and provides a metallic luster with a multicolored, three-dimensional, and deep pattern pattern on the surface of a transferred object, as well as abrasion resistance, impact resistance, The purpose of the present invention is to provide a transfer foil base material that can form a surface with excellent chemical resistance, weather resistance, etc.

The transfer foil base material of the present invention consists of a release agent layer, a primary protective layer, at least two layers on one side of a flexible base film, and a multilayer colored layer and a secondary protective layer, each of which is colored in a different color. ,
A transfer foil base material in which a metal vapor-deposited film layer and a heat-sensitive adhesive layer are laminated in this order, and the multilayer colored layer has pattern patterns engraved at various depths by line processing etc.,
Thus, it is characterized in that the metal vapor deposited film can be seen through the multicolored colored layer from the primary protective layer side.

The present invention will be explained below based on the drawings.

FIG. 1 shows an embodiment of the transfer foil base material of the present invention.

The base film 1 to be used is not particularly limited, but normally, flexible synthetic resin films such as polyester, polyamide, polyimide, polycarbonate, polyvinyl chloride, polypropylene, polyethylene, etc., and appropriate laminates thereof are preferably used. . Cellophane and glassine paper are also suitably used. A release agent layer 2 is provided on one side of the base film. The mold release agent is not particularly limited, and may be one or more of various conventionally known resins, such as silicone resins, fluorine resins, acrylic resins, waxes, cellulose resins, rosins and their derivatives, and styrene resins. Mixtures of more than one species are used. Usually, these are applied to a base film in the form of a solution and dried to form a release agent layer. The coating thickness is, for example, 0.5 to 1 μm. This release agent layer is provided mainly for the purpose of easily peeling the base film from the transfer laminate consisting of a primary protective layer, a multilayer colored layer, a secondary protective layer, a metal vapor deposited film layer, and an adhesive layer, which will be described later. Furthermore, after the base film is peeled off, a portion remains on the primary protective layer, improving the slip resistance of the surface of the transferred transfer laminate. A primary protective layer 3 is formed on the mold release agent layer. The primary protective layer is preferably made of a resin that is transparent, highly flexible, and has impact resistance and abrasion resistance. Examples of such resin include, for example,
Cellulose acetate resin, cellulose propionate resin, cellulose acetate butyrate resin, etc. are suitable. Usually, it is formed by applying a resin solution onto the mold release agent layer and drying it. - The multilayer colored layer 4 on the next protective layer consists of at least two transparent resin layers, preferably thermosetting resin layers, which are colored in different colors.

The illustrated multilayer colored layer consists of two layers, a primary colored layer 4a and a secondary colored layer 4b, from the base film side. As the colorant, one or more of dyes, pigments, metal powders, etc. can be used. As the metal powder, for example, as disclosed in Japanese Patent No. 688991, metal powder obtained by coating both surfaces of a metal vapor deposited film with resin and then pulverizing the coated film can also be used. When the colored layer contains pigment or metal powder, the transparency of the colored layer varies depending on the content, but in the present invention, transparent means that all layers other than the metal vapor-deposited film are substantially transparent. Often includes translucence. The colored layer is made of resin materials such as melamine resin, urea resin, polyester resin,
Using one or a mixture of two or more of epoxy resins, phenolic resins, acrylic resins, urethane resins, etc., mix coloring agents and solvents to form a liquid, and sequentially apply the mixture onto the primary protective layer.
Dry to form a multilayer colored layer. The coating layer thickness of each colored layer is, for example, about 0.5 to 1 μm. In the present invention, patterns 5 such as hair lines, spin lines, checker lines, matte finishing, etc. are engraved at various depths on this multi-layered colored layer using sandpaper, a grindstone, high-pressure sand spraying, etc.

That is, as shown in the figure, in some places the pattern strength extends to the primary coloring layer, and in other places it remains only in the secondary coloring layer, thus when the multi-layered coloring layer is viewed from the primary protective layer, the engraved pattern is visible. Depending on the depth of the pattern, the multicolored layers are multicolored and have a rich three-dimensional effect, creating a deep pattern. The above-mentioned pattern processing is normally carried out continuously while transporting the base film.

For example, by rotating a sandpaper roll in the opposite direction to the traveling direction of the base film and bringing the roll into contact with the multilayer colored layer with various contact forces, hairline processing with different depths can be performed. I can do it. The multilayer colored layer has a secondary protective layer 6 on the surface on which the uneven pattern is applied.

The secondary protective layer 6 is also a transparent resin layer like the primary protective layer, preferably thermosetting or self-crosslinking, and
It is formed by coating a colored layer with a solution of a resin that has good adhesion to the metal vapor deposited film, and drying and curing it by heating. As the resin material, for example, one type or a mixture of two or more resins appropriately selected from resins for the colored layer can be used. A metal vapor deposition film 7 is formed on the secondary protective layer.

That is, after vacuum drying the laminate after forming the secondary protective layer to sufficiently remove the organic solvent etc. remaining in the secondary protective layer,
Several hundred A, for example 400 to 500 A, of metal on the secondary protective layer
Deposit to a thickness of . The vacuum deposition method is not particularly limited, and may include high frequency induction heating method, electric resistance heating method, sputtering method,
Any method such as ion plating method or electron beam heating method can be used, and the metals to be deposited can be aluminum, silver, gold,
In addition to single metals such as copper, zinc, nickel, and chromium, alloys and various compounds of these metals can be used as appropriate. A heat-sensitive adhesive layer 8 is provided on this metal vapor deposited film. As the adhesive, those conventionally used in the production of transfer foil base materials can be used as appropriate. For example, adhesives made of thermoplastic or thermosetting resins such as vinyl acetate, vinyl chloride monovinyl acetate copolymer, acrylic resin, ethylene monovinyl acetate copolymer, rubber derivatives, epoxy resin, rosin resin, petroleum resin, etc. It is. The adhesive contains titanium oxide, calcium carbonate, barium sulfate, lithopone, talc,
It may contain pigments such as clay and white carbon, extender pigments, and others. In the transfer foil base material of the present invention,
As described above, since a multi-layered colored layer is provided and patterns such as hair lines are engraved at various depths on this colored layer, the multi-layered colored layer can be multi-colored depending on the depth of the pattern. Moreover, it forms a three-dimensional pattern, and since the metallic luster of the metal vapor deposition film can be seen through this multicolored transparent pattern, the transfer surface has a multicolored and deep patterned metallic luster, which is different from conventional methods. The single color and flat patterned pattern contrasts sharply with the metallic luster.
Furthermore, according to the transfer foil base material of the present invention, the multilayer colored layer having the pattern is protected by being sandwiched between the primary and secondary protective layers, so the pattern is resistant to impacts, friction, chemicals, etc. Since the pattern is not directly damaged by the product and can be blocked by the primary protective layer from UV rays, the pattern has excellent impact resistance, abrasion resistance, chemical resistance, weather resistance, etc., and as a result, the pattern This significantly increases the durability of the metallic luster. The metal vapor deposited film is also protected by the secondary protective layer and does not cause any whitening phenomenon. In addition, unlike conventional transfer foil base materials, the release agent is applied to a smooth base film, ensuring good peelability between the base film and the transfer laminate, and preventing delamination of the transfer laminate. Furthermore, there is no risk.

According to the present invention, as shown in FIG. 2, the adhesive layer is also made transparent, and a second transparent colored layer 9 is further provided between the adhesive layer and the metal vapor deposited film. It may be. This is to enable the metal vapor deposited film to be seen through from the transfer back surface when the transfer target is transparent. Similar to the multilayer colored layer, this colored layer is also formed by applying a resin liquid containing a mixture of dyes, pigments, metal powders, etc. to the metal vapor deposited film, and hardening and drying the resin liquid. Examples of the present invention are listed below, but the present invention is not limited to these Examples at all.

In addition, parts mean parts by weight. Example 1 Methyl methacrylate resin 70 was coated on one side of a 19μ thick polyethylene terephthalate film (base film).
parts, 10 parts of montan wax and 20 parts of rosin, 50 parts of toluene, 50 parts of xylene and 10 parts of methyl ethyl ketone.
It was dissolved in a mixed solvent consisting of 0 parts, coated with a gravure coater to a thickness of 1 μm, and dried at a temperature of 90 to 120° C. to form a release agent layer.

A tree solution prepared by dissolving 50 parts of cellulose acetate and 50 parts of cellulose acetate butyrate in a mixed solvent consisting of 100 parts of ethylseron lube, 200 parts of acetone, 100 parts of methyl isobutyl ketone and 600 parts of methyl ethyl ketone was placed on the mold release agent layer. It was applied to a thickness of 0.5 μm using a gravure coater and dried at a temperature of 80 to 110° C. to form a transparent primary protective layer.

Next, 10 parts of blue dye, 10 parts of phthalocyanine blue,
3 parts of precipitated barium sulfate (extender pigment), 50 parts of 50(f) melamine resin solution and 50 parts of 50% urea resin solution were mixed with 80 parts of methanol, 40 parts of butanol, 5 parts of methyl cellosolve, 25 parts of butyl acetate and 50 parts of methyl ethyl ketone. The colored resin liquid thus obtained was applied to a thickness of 1 μm on the primary protective layer using a rotogravure printing machine, dried with hot air at 50 to 60°C, and dried with infrared rays at 120 to 170°C. A primary colored layer was formed.

Secondary colored layer & 5 parts of louse yellow dye, 10 parts of orange fluorescent pigment
2 parts of titanium oxide, 40 parts of 50% thermosetting acrylic resin solution, 20 parts of 40% unsaturated polyester resin solution and 40 parts of 50% thermosetting polyurethane resin solution, 20 parts of methyl isobutyl ketone, 140 parts of methyl ethyl ketone,
It was mixed and kneaded with a mixed solvent consisting of 20 parts of toluene and 20 parts of butyl acetate, and this resin liquid was applied to the primary colored layer, which was then dried in the same manner as above. Hairline processing was performed on the two colored layers thus formed to various depths by using a sandpaver roll and varying the contact pressure.

Next, 70 parts of a 50% thermosetting acrylic resin-epoxy resin solution and 30 parts of a 45% thermosetting polyurethane resin solution were mixed, followed by 30 parts of methyl isobutyl ketone, 30 parts of butyl acetate, 40 parts of diacetone alcohol, and 100 parts of methyl ethyl ketone. The mixture was diluted with a mixed solvent consisting of 50% and 50%, and applied to the colored layer after hairline processing to a thickness of 1 μm using a gravure coater, and was cured and dried to obtain a transparent secondary protective layer.

After forming the secondary protective layer, the secondary protective layer is pre-dried under reduced pressure of about 10-3 Torr to remove residual organic solvents, etc. Aluminum is coated on the protective layer with a film thickness of approximately 500A using high frequency induction heating method.
was vacuum evaporated.

Finally, 20 parts of pinyl acetate resin, 50 parts of acrylic resin,
20 parts of vinyl chloride monovinyl acetate copolymer and 10 parts of rosin ester resin were mixed with 300 parts of ethyl acetate and 20 parts of butyl acetate.
0 parts, methanol 200 parts, and toluene 300 parts mixed solvent, coated on the aluminum vapor deposited film to a thickness of 1.5μ using a roll coater, and dried at a temperature of 50 to 80°C to form an adhesive layer. form. Thus, a transfer foil base material according to the present invention was obtained.

Example 2 Using #350 cellophane with a thickness of 23.5μ as a base film, 25 parts of fluororesin, 50 parts of styrene resin, and 25 parts of fatty acid amide were kneaded, followed by 25 parts of ethyl cellosolve, 75 parts of toluene, and 100 parts of methyl ethyl ketone. This solution was applied to one side of cellophane to a thickness of 0.5 μm and dried to form a release agent layer.

In exactly the same manner as in Example 1, a primary protective layer and a two-layer colored layer were formed on the release agent layer, and the colored layer was subjected to spin line processing using a rotary grindstone device. After forming a secondary protective layer and an aluminum vapor deposition layer on this colored layer in exactly the same manner as in Example 1, a colored layer same as the primary colored layer of Example 1 was formed, and finally on this colored layer. The same adhesive layer as in Example 1 was formed, thus obtaining a transfer foil base material in which the colored metal foil could be seen through from the transfer back side.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the transfer foil base material of the present invention, and FIG. 2 is a longitudinal sectional view showing another embodiment. DESCRIPTION OF SYMBOLS 1... Base film, 2... Mold release agent layer, 3... Primary protective layer, 4... Multilayer colored layer, 4a... Primary colored layer, 4b... Secondary colored layer, 5... Pattern, 6... Secondary protective layer, 7... Metal vapor deposition film, 8... Adhesive layer, 9
...Second colored layer.

Claims (1)

[Scope of Claims] 1. On one side of a flexible base film, a release agent layer, a primary protective layer, a multilayer colored layer consisting of at least two layers colored in different colors, a secondary protective layer, and a metal. A transfer foil base material in which a vapor-deposited film layer and a heat-sensitive adhesive layer are laminated in this order, and the multilayer colored layer has pattern patterns engraved at various depths by line processing etc. A transfer foil base material characterized in that a metal vapor deposited film can be seen through a multicolored colored layer from the primary protective layer side. 2. The adhesive layer is transparent, and a second colored layer is provided between the adhesive layer and the metal vapor deposited film layer, so that the metal vapor deposited film is also transmitted from the adhesive layer through the colored layer. The transfer foil base material according to claim 1, wherein the transfer foil base material is made to be transparent.