JPH1158584A - Transfer foil inhibited to be chipped - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer foil inhibited to be chipped in the case of slitting the foil to become a suitable width for transferring. SOLUTION: In the transfer foil 7, one side surface of a base film 1 is treated to be easily adhered, and a release layer 2 is provided on the easily adhered surface 1a except a slit part 6. A surface of the film 1 at the side provided with the layer 2 is entirely provided with a release layer 3 which is released from the layer 2 but not released from the film 1. And, a pattern layer 4 and an adhesive layer 5 are sequentially laminated on the layer 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer foil which does not spill when it is slit into a width suitable for transfer.

[0002]

2. Description of the Related Art Conventionally, a release layer 2 and a release layer 3 are sequentially laminated on one surface of a base film 1 on the entire surface.
Using a transfer foil 7 (see FIG. 4) on which a pattern layer 4, an adhesive layer 5, and the like are sequentially laminated, a transfer layer including the release layer 3, the pattern layer 4, the adhesive layer 5, and the like is heated and pressed. There is a transfer method in which the base film 1 is peeled off together with the release layer 2 after being brought into close contact with the transfer object, and only the transfer layer is transferred to the surface of the transfer object to decorate the transfer object. When the object to be transferred is a resin molded product, as a method of performing the transfer method more rationally, the transfer foil 7 is sandwiched in a molding die, the resin is injected and filled in the cavity, cooled, and cooled. After the transfer foil 7 is adhered to the surface at the same time as the step (a), the base film 1 is peeled off together with the release layer 2 and the transfer layer is transferred to the surface of the resin molded product to decorate the resin. .

Normally, the transfer foil 7 used in the transfer method or the simultaneous molding transfer method is not economically manufactured if it is manufactured in a width corresponding to the size of the material 8 to be transferred. This is slit into an appropriate width in accordance with the size of the transfer object 8 (see FIG. 5), and then transferred.

[0004]

However, in this case, the slit portion of the transfer foil 7 is spilled by a shock applied to the blade at the time of the slit, that is, the transfer layer 3, the pattern layer 4, the adhesive layer 5, etc. Layer is base film 1
There was a drawback of causing a phenomenon of peeling off (see FIG. 6). This is because, between the base film of the transfer foil and the transfer layer, not only the portion provided for transfer printing but also the portion not provided for transfer printing is excellent in releasability. This disadvantage is, when there are many pattern layers as the transfer layer, or when it is necessary to provide a vapor deposition layer as the pattern layer, when the release layer must be thick like a hard coat foil, when there are many functional layers, etc. The total was more remarkable when the transfer layer was thicker.

[0005] As a result, the foil spilled pieces 9 adhered to the transfer foil and entered between the transfer object and the transfer layer during transfer.
In the case of in-mold transfer in which the transfer foil is placed in a mold and transferred at the same time as molding, in addition to the above-described phenomenon, the spilled piece 9 attached to the back surface of the transfer foil is transferred to the mold, thereby causing a dent. A so-called foil spill was attached to the molded product.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a transfer foil which does not spill when a slit is formed so as to have an appropriate width for transfer.

[0007]

In order to achieve the above object, the transfer foil which does not spill out according to the present invention is provided with an easy adhesion treatment on one side of a base film, and a release layer is provided on the easy adhesion treatment surface. The release layer is provided except for the slit portion, and a release layer that peels off from the release layer but does not release from the base film is provided on the entire surface of the base film on the side where the release layer is provided. , A pattern layer and an adhesive layer were sequentially laminated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a schematic partial enlarged sectional view showing an embodiment of a transfer foil according to the present invention which does not spill, and FIG.
FIG. 3 is a schematic partial enlarged cross-sectional view showing a state immediately after slitting a non-spillable transfer foil, and FIG. 3 is a schematic partial enlarged cross-sectional view showing a peeling step when the non-spillable transfer foil of FIG. 1 is transferred after slitting. is there. In the figure, 1 is a base film,
Reference numeral 1a denotes an easily adhesion-treated surface, 2 denotes a release layer, 3 denotes a release layer, 4 denotes a pattern layer, 5 denotes an adhesive layer, and 6 denotes a slit portion.

The base film 1 is made of a resin sheet such as a polypropylene resin, a polyethylene resin, a polyamide resin, a polyester resin, a polyacrylic resin, a polyvinyl chloride resin, or a metal such as an aluminum foil or a copper foil. What is used as the base film 1 of an ordinary transfer material, such as a foil, glassine paper, coated paper, a cellulosic sheet such as cellophane, or a composite of the above sheets can be used. One surface of such a base film 1 is subjected to an easy adhesion treatment. The easy-adhesion treatment is a treatment for adhering the release layer 3 so that the release layer 3 does not peel off from the base film 1 when the transfer foil 7 is slit to have an appropriate width for the transfer. Examples of the easy adhesion treatment method include a corona treatment method for roughening the surface of the base film 1 to facilitate adhesion, and a method of applying an anchor coat to the surface when the base film 1 is manufactured.

When the base film 1 is peeled off after transfer or simultaneous transfer with molding, the release layer 2
It is a layer that is released from the release layer 3 together with the release layer 3, and is provided on the easy-adhesion treated surface 1a of the base film 1 except for the slit portion 6 of the transfer foil 7. Examples of the material of the release layer 2 include an epoxy resin-based release agent, an epoxy melamine resin-based release agent, a melamine resin-based release agent, a silicone resin-based release agent, a fluororesin-based release agent, and a cellulose derivative-based release agent. Agents, urea resin-based release agents, polyolefin resin-based release agents, paraffin-based release agents, and composite release agents thereof. Examples of a method for forming the release layer 2 include printing methods such as a gravure printing method and a screen printing method. The slit portion 6 has a width of 5 to 5 along a line where the slit of the transfer foil 7 is to be slit.
It is a portion of about 10 mm. Note that making the width of the slit portion 6 wider is somewhat uneconomical. However, reducing the width of the slit portion 6 is more problematic than the relationship of slit accuracy. That is, there is a risk that the slit blade may be displaced from the slit portion 6.

The release layer 3 is formed entirely on the base film 1 on which the release layer 2 is provided. When the base film 1 is peeled after the transfer or the simultaneous transfer with the molding, the part formed on the release layer 2 is peeled from the release layer 2 and becomes the outermost surface of the transfer object. The portion directly formed on the easy-adhesion-treated surface 1a, that is, the slit portion 6, is a layer which does not peel off from the base film 1 but remains in close contact with the base film 1 side. Therefore, since the release layer 3 is in close contact with the base film 1 at the slit portion 6, foil spilling does not occur when slitting to have an appropriate width for transfer.

The material of the release layer 3 includes 1) a thermoplastic acrylic resin, 2) a polymerizable functional group such as polyester acrylate, polyether acrylate, urethane acrylate, epoxy acrylate, spiro acetal acrylate, polybutadiene acrylate, and styrene prepolymer. And a styrene-based diluent,
An ultraviolet or electron beam curable resin comprising a reactive diluent such as an acrylic monomer diluent and an epoxy diluent and a photopolymerization initiator such as benzoin alkyl ethers, benzophenones and acetophenones which are added as necessary.
An ultraviolet or electron beam curable resin obtained by adding a polyfunctional isocyanate to the component 2), 4) a polyaddition product of the prepolymer having a polymerizable functional group and the polyfunctional isocyanate, the reactive diluent, It is preferable to select and use an ultraviolet or electron beam curable resin composed of the above photopolymerization initiator to be added as necessary. In 2) to 4), the resin to which a photopolymerization initiator is added is an ultraviolet curable resin, and the resin without the photopolymerization initiator is an electron beam curable resin. In addition, a reactive diluent is not always necessary when a solvent is used. The release layer 3 may be colored or uncolored.

As a method for forming the release layer 3, there are a coating method such as a gravure coating method, a roll coating method, a comma coating method and a lip coating method, and a printing method such as a gravure printing method and a screen printing method. The release layer 3 composed of the component 2) is of a pre-cure type, and after the solvent is dried, it is irradiated with ultraviolet rays or electron beams. The release layer 3 composed of the components 3) and 4) is of an after-cure type,
Irradiation is not performed during the preparation of the transfer foil, but is performed after transfer or simultaneous transfer with molding.

The pattern layer 4 is formed on the release layer 3, usually as a printing layer. As the material of the printing layer, a resin such as a polyvinyl resin, a polyamide resin, a polyester resin, a polyacryl resin, a polyurethane resin, a polyvinyl acetal resin, a polyester urethane resin, a cellulose ester resin, and an alkyd resin is used as a binder. It is preferable to use a coloring ink containing a pigment or dye of an appropriate color as a coloring agent. As a method for forming the printing layer, a normal printing method such as an offset printing method, a gravure printing method, or a screen printing method may be used. In particular, an offset printing method or a gravure printing method is suitable for performing multicolor printing and gradation expression. In the case of a single color, a coating method such as a gravure coating method, a roll coating method, a comma coating method, and a lip coating method can be employed. The printing layer is generally provided entirely or partially according to the design to be expressed.

The pattern layer 4 may be composed of a metal thin film layer or a combination of a printing layer and a metal thin film layer. The metal thin film layer is for expressing metallic luster as the pattern layer 4, and is formed by a vacuum deposition method such as a resistance heating method, a sputtering method, or an ion plating method.
It is formed by plating or the like. In this case, depending on the metallic luster color to be expressed, aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead,
Metals such as zinc, their alloys or compounds are used.
As an example of a method for forming a partial metal thin film layer, after forming a solvent-soluble resin layer on a portion that does not require a metal thin film layer, a metal thin film is entirely formed thereon, and solvent cleaning is performed. There is a method of removing an unnecessary metal thin film together with the solvent-soluble resin layer. The solvent often used in this case is water or an aqueous solution. Further, as another example, a metal thin film is formed on the entire surface, then a resist layer is formed on a portion where the metal thin film is to be left, and the portion covered with the resist layer is etched with acid or alkali. There is a method of removing a metal thin film other than the above. When providing a metal thin film layer,
In order to improve the adhesion between the adjacent layer and the metal thin film layer, a front anchor layer or a rear anchor layer may be provided. As the material of the front anchor layer and the rear anchor layer, two-component cured urethane resin, thermosetting urethane resin, melamine resin, cellulose ester resin, chlorine-containing rubber resin,
It is preferable to use a chlorine-containing vinyl resin, a polyacrylic resin, an epoxy resin, a vinyl copolymer resin, or the like.
As a method of forming the front anchor layer and the rear anchor layer,
Gravure coating, roll coating, comma coating,
There are a coating method such as a lip coating method and a printing method such as a gravure printing method and a screen printing method.

The adhesive layer 5 adheres each of the above layers to the surface of the transfer object 8. The adhesive layer 5 is formed on a portion to be bonded. That is, if the portion to be bonded is the entire surface, the adhesive layer 5 is formed over the entire surface. If the portion to be bonded is partial, the adhesive layer 5 is partially formed. As the adhesive layer 5, a heat-sensitive and pressure-sensitive resin suitable for the material of the transferred material 8 is appropriately used. For example, when the material of the transfer object 8 is a polyacrylic resin, a polyacrylic resin may be used. Further, when the material of the transfer object is a polyphenylene oxide / polystyrene resin, a polycarbonate resin, a styrene copolymer resin, or a polystyrene blend resin, a polyacryl resin, a polystyrene resin having an affinity for these resins, A polyamide resin or the like may be used. Further, when the material of the transfer object is a polypropylene resin, chlorinated polyolefin resin, chlorinated ethylene-vinyl acetate copolymer resin, cyclized rubber, and coumarone indene resin can be used. Examples of the method for forming the adhesive layer 5 include a coating method such as a gravure coating method, a roll coating method, a comma coating method, and a lip coating method, and a printing method such as a gravure printing method and a screen printing method.

The structure of the transfer foil that does not spill is not limited to the above-described embodiment. For example, when the material of the pattern layer 4 is excellent in adhesiveness to an object to be transferred, The adhesive layer 5 can be omitted.

[0019]

【Example】

Example 1 A 2 μm-thick 2 μm-thickness of 38 μm, which was previously subjected to an easy-adhesion treatment on one side
An axially stretched polyethylene terephthalate film (F-39 manufactured by Toray Industries, Inc.) was used as a base film. After applying a gravure printing to the easy-adhesion treated surface of the base film except for a slit portion having a width of 10 mm using an ink containing an epoxy melamine resin as a main component, a release layer having a thickness of about 1 μm is provided by heating at 170 ° C. for 20 seconds. Was. The base film on which the release layer is provided is peeled off from the release layer by performing gravure printing over the entire surface using an ink containing a thermoplastic acrylic resin (BR-83 (MMA) manufactured by Mitsubishi Rayon Co., Ltd.) as a main component. Provided a release layer having a thickness of 1 μm which was not peeled off from the base film. Each pattern layer was provided on the release layer by gravure printing a pattern pattern using an ink containing a vinyl-acrylic copolymer resin and a colorant as main components, and the total thickness of all the pattern layers was 5 μm. An adhesive layer having a thickness of 2 μm was provided on the release layer and the pattern layer by gravure printing using an ink containing an acrylic resin as a main component, to obtain a transfer foil without foil spillage.

Example 2 A 38 μm-thick 2 piece which had been subjected to an easy-adhesion treatment on one side in advance.
An axially stretched polyethylene terephthalate film (E-4100 manufactured by Toyobo) was used as a base film. Gravure printing is performed on the easily adhesive treated surface of the base film using an ink containing an aminoalkyd resin as a main component, except for a slit portion having a width of 10 mm, and then heated at 150 ° C. for 30 seconds to provide a release layer having a thickness of about 1 μm. Was. The entire surface of the base film provided with the release layer is gravure coated with an ink mainly composed of an ultraviolet curable resin composed of the following three types of compositions and heated at 80 ° C. for 10 seconds.
0 mj / cm ^{2 A} thickness of 5 μm which is released from the release layer but not released from the base film when irradiated with ultraviolet rays.
Was provided. Prepolymer having polymerizable functional group 80 parts Urethane acrylate Reactive diluent Trimethylpropane acrylate 20 parts Photopolymerization initiator Benzophenone 3 parts

Each pattern layer is provided on the release layer by gravure printing a pattern pattern using an ink containing an acrylic resin and a colorant as main components, and the total thickness of all the pattern layers is 3 μm.
m. An adhesive layer having a thickness of 2 μm was provided on the release layer and the pattern layer by gravure printing over the entire surface using an ink containing an acrylic resin as a main component, to obtain a transfer foil without foil spillage.

Example 3 A 2 μm-thick 2 μm-thick precoated on one side in an easy adhesion treatment
An axially stretched polyethylene terephthalate film (G-120E manufactured by Diafoil Hoechst) was used as a base film. After applying a gravure printing to the easy-adhesion treated surface of the base film except for a slit portion having a width of 10 mm using an ink containing an epoxy melamine resin as a main component, a release layer having a thickness of about 1 μm is provided by heating at 170 ° C. for 20 seconds. Was. The entire surface of the base film provided with the release layer is gravure coated with an ink mainly composed of an ultraviolet curable resin composed of the following four kinds of compositions, and is cured at 150 ° C. for 30 minutes.
By heating for 2 seconds, a release layer having a thickness of 5 μm, which was released from the release layer but was not released from the base film, was provided. Prepolymer having polymerizable functional group Epoxy acrylate 100 parts Polyfunctional isocyanate 1,6 Hexane diisocyanate 10 parts Solvent Anone 140 parts Photopolymerization initiator 1-hydroxycyclohexyl phenyl ketone 3 parts

Each pattern layer was provided on the release layer by gravure printing of a pattern pattern using an ink containing a PVC / acrylic copolymer resin and a coloring agent as main components, and the total thickness of all the pattern layers was 3 μm. An adhesive layer having a thickness of 2 μm was provided on the release layer and the pattern layer by gravure printing over the entire surface using an ink containing an acrylic resin as a main component, to obtain a transfer foil without foil spillage.

Example 4 A 38 μm-thick 2 piece which had been subjected to an easy-adhesion treatment on one side in advance.
An axially stretched polyethylene terephthalate film (E-4100 manufactured by Toyobo) was used as a base film. Gravure printing is performed on the easily adhesive treated surface of the base film using an ink containing an aminoalkyd resin as a main component, except for a slit portion having a width of 10 mm, and then heated at 150 ° C. for 30 seconds to provide a release layer having a thickness of about 1 μm. Was. The following two types of compositions are subjected to a polyaddition reaction to prepare a reaction product, and a prepolymer having a polymerizable functional group is epoxy acrylate 100 parts polyfunctional isocyanate hydrogenated xylene diisocyanate 10 parts

The entire surface is gravure-printed with an ink mainly composed of an ultraviolet-curable resin composed of this reaction product and the following two kinds of compositions, and is heated at 90 ° C. for 5 seconds to be peeled from the release layer. However, a release layer having a thickness of 2 μm which was not peeled off from the base film was provided. Solvent MEK 160 parts Photopolymerization initiator 2-hydroxy-2-methyl-1-phenylpropane-1-one 5 parts

Each pattern layer is provided on the release layer by gravure printing a pattern pattern using an ink containing an acrylic resin and a colorant as main components, and the total thickness of all the pattern layers is 3 μm.
m. An adhesive layer having a thickness of 2 μm was provided on the release layer and the pattern layer by gravure printing over the entire surface using an ink containing an acrylic resin as a main component, to obtain a transfer foil without foil spillage.

Next, when each of the transfer foils obtained in Examples 1 to 4 was slit at a portion where the release layer was not provided, no foil spilling occurred.

[0028]

The transfer foil of the present invention, which does not spill, has the following structure, and therefore has the following excellent effects.

That is, an easy-adhesion treatment is performed on one surface of the base film, a release layer is provided on the easy-adhesion treatment surface except for a slit portion, and the surface of the base film on which the release layer is provided is provided. Since the release layer that peels off from the release layer but does not peel off from the base film is provided on the entire surface, foil spilling does not occur when slitting to have an appropriate width for transfer.

[Brief description of the drawings]

FIG. 1 is a schematic partial enlarged cross-sectional view showing one embodiment of a transfer foil that does not spill over according to the present invention.

FIG. 2 is a schematic partial enlarged sectional view showing a state immediately after slitting the transfer foil without spilling of FIG. 1;

FIG. 3 is a schematic partial enlarged cross-sectional view showing a peeling step when the transfer foil without spilling of FIG. 1 is transferred after slitting.

FIG. 4 is a schematic partial enlarged sectional view showing one embodiment of a conventional transfer foil.

FIG. 5 is a diagram illustrating a slit of a transfer foil.

FIG. 6 is a schematic partial enlarged sectional view showing a state immediately after slitting the transfer foil of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base film 1a Easy adhesion processing surface 2 Release layer 3 Release layer 4 Pattern layer 5 Adhesive layer 6 Slit part 7 Transfer foil 8 Transfer object 9 Foil spilled piece

Claims (1)

[Claims] An easy-adhesion treatment is performed on one surface of a base film, a release layer is provided on the easy-adhesion treatment surface except for a slit portion, and a surface of the base film on which the release layer is provided. A release layer that is peeled off from the release layer but is not peeled off from the base film is provided on the entire surface, and a pattern layer and an adhesive layer are sequentially laminated on the release layer. .