JPH0717197A - Antistatic transfer foil - Google Patents

Abstract

PURPOSE:To stabilize an antistatic effect with the passage of time and reduce the cost. CONSTITUTION:In a transfer foil provided with a peeling layer 2, pattern layer 3 and adhesive agent layer 4 in order on a base 1 having peeling properties, a primer layer 5 is provided between the peeling layer 2 and pattern layer 3 and conductive fine powder is added to the primer layer 5. Since the primer layer 5 is not exposed after transfer molding, an antistatic effect can be displayed extending over a long period. Furthermore, since the surface active agent is added to the peeling layer 2, an antistatic agent is contained into both of the peeling layer 2 and primer layer 5 and the high antistatic effect is obtained by sinergism of them. Since use quantity of the expensive conductive fine powder is small, the production cost is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved transfer foil,
More specifically, it relates to an antistatic transfer foil that eliminates the generation of static electricity during manufacturing and after transfer molding.

[0002]

2. Description of the Related Art A method of using a transfer foil has been generally widely used in the past when a pattern or the like is applied on a substrate such as plastic, metal or glass which is difficult to be directly printed. This method is a printing method in which a transfer layer consisting of a pattern layer or the like once formed on a peelable substrate is transferred to a printing medium, and the transfer foil to be used may be a release layer on the substrate if necessary. A typical example is one in which a release layer, a pattern layer and an adhesive layer are sequentially provided as a transfer layer thereon. Since such a transfer foil tends to generate static electricity at the time of manufacturing or after transfer molding, it is used as an antistatic transfer foil for preventing this, and the release layer is charged with a surfactant, conductive fine powder, or the like. It is known that an inhibitor is added.

[0003]

Among the antistatic transfer foils described in the prior art, those in which a surfactant is added to the release layer have an initial antistatic effect, but the release layer is exposed after transfer molding. It has the drawback that it has no stability over time and its performance is insufficient. In addition, when the conductive fine powder is added to the release layer, 30 to 50 parts by weight of the conductive fine powder is added to the release layer ink. Since it is added, there is a drawback that the manufacturing cost is high.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an antistatic transfer foil having an antistatic effect which is stable over time and which is low in manufacturing cost. To provide.

[0005]

In order to achieve the above object, the antistatic transfer foil of the present invention has a release layer 2 on a base material 1 having a releasability as shown in FIG. In the transfer foil in which the picture layer 3 and the adhesive layer 4 are sequentially provided, a primer layer 5 is provided between the peeling layer 2 and the picture layer 3, and conductive fine powder is added to the primer layer 5.
It is preferable to add a surfactant to the release layer 2. Alternatively, the peeling layer 2 may be made of an ionizing radiation curable resin.

The base material 1 is commonly used as a base material for transfer foils, including plastic films such as polyester, polyphenylene sulfide, and polypropylene, and papers such as high-quality paper on which a release layer such as polyolefin is formed. You can use the one you have. Among them, polyethylene terephthalate film is preferable because it has excellent heat resistance and solvent resistance. Moreover, you may form a mold release layer with silicone or a melamine resin in those films as needed.

The release layer 2 may be any release agent such as an acrylic resin-based, urethane resin-based or vinyl resin-based release layer ink, or may be a polyoxyethylene alkyl phosphate-based surfactant or special release agent. It is formed by a known coating means using a material to which a polycarboxylic acid type polymer surfactant, a quaternary ammonium salt surfactant or the like is added. The addition amount is preferably 5 to 10 parts by weight with respect to the ink. If the addition amount is less than 5 parts by weight, the effect is not exhibited, and if it exceeds 10 parts by weight, the physical properties of the release layer 2 are deteriorated.

As the ionizing radiation curable resin for forming the peeling layer 2, a composition in which a prepolymer, an oligomer or a monomer having a polymerizable unsaturated bond or an epoxy group in the molecule is appropriately mixed is used. As the surfactant added to this ionizing radiation curable resin, a reactive surfactant having an unsaturated double bond is preferable.

The pattern layer 3 may be formed by a known method such as a gravure printing method, a screen printing method, an offset printing method using a normal ink. The picture layer 3 here means
As shown in the drawings, not only the print layer 3a having a pattern or pattern, but also a solid print layer 3b covering the entire surface or a combination thereof is included.

The adhesive layer 4 is appropriately selected depending on the material of the transferred material. For example, acrylic resins, vinyl chloride-vinyl acetate copolymers, rubber resins, and urethane resins are used as vehicles. The adhesive may be applied by known means such as roll coating and bar coating.

The primer layer 5 is formed by a known coating means using an arbitrary primer to which conductive fine powder is added. The conductive fine powder includes Ni, Cu, A
Fine powders obtained by mixing, doping, etc., inorganic materials such as g, Au, Sn, In, Sb, P and Zn and oxides thereof or either one of them can be used. The addition amount is 10 to 80 parts by weight, preferably 20 to 40 parts by weight, based on the primer resin. If the addition amount is less than 10 parts by weight, the antistatic effect does not appear, and if it exceeds 80 parts by weight, delamination occurs and the cost increases. The thickness of the primer layer 5 is 0.5 to 10 μm. 0.5 μm
If it is less than 10 μm, the surface resistance becomes 10 ¹³ Ω or more and the antistatic effect does not appear. If it exceeds 10 μm, the antistatic effect appears but the cost increases. In addition, since the light transmittance of the primer layer 5 formed by using the above conductive fine powder under such a condition hardly decreases, the pattern layer 3 can be seen even if it is below. . The primer layer 5 may be composed of a plurality of layers in which conductive fine powder is added to at least one of the layers.

[0012]

In the antistatic transfer foil of the present invention having the above-mentioned constitution, the primer layer containing the conductive fine powder is not exposed on the surface after transfer molding, so that the antistatic effect is exerted for a long period of time. Furthermore, when the release layer contains a surfactant, a synergistic action with the primer layer containing the conductive fine powder exerts a remarkable antistatic effect for a long period of time.

[0013]

【Example】

(Example 1) A polyethylene terephthalate film (S-10, manufactured by Toray) having a thickness of 25 μm was used as a base material, and a release layer ink (46-7, Showa Ink Mfg. Co., Ltd.) was mixed with a surfactant (CC, Asahi Denka Kogyo, CC). After adding 5 parts by weight of -36), a wire bar (# 16) was applied to have a thickness of 6 μm and then dried at 100 ° C. for 1 minute to form a release layer. Then, a primer (produced by Showa Ink Mfg. Co., Ltd., acrylic type) to which 20 parts by weight of fine powder of tin oxide was added was gravure-coated to a thickness of 1 μm on the release layer, and the coating was applied at 60 ° C. for 1 hour.
It was dried for a minute to form a primer layer. Next, printing ink (Showa Ink Mfg. Co., G
Gravure printing of the pattern with G) at a coating amount of 2 μm and drying at 60 ° C. for 1 minute to form a pattern layer, and then an acrylic resin adhesive (HS-3 manufactured by Showa Ink Mfg. Co., Ltd.).
2 mat) was gravure-coated to a thickness of 2 μm and dried at 60 ° C. for 1 minute to produce a transfer foil.

Using this transfer foil, an acrylic plate was painted by a roll transfer machine. Transfer condition is 200 ℃ × 10k
g / cm ² × 2 m / min. After transfer molding, in order to confirm the antistatic effect, an ashing test (transfer surface with a cloth
After rubbing, it was judged whether or not the ash of the cigarette was dropped and adhered to the transfer surface.) As a result, ash did not adhere immediately after transfer and after a long time, and good results were obtained. It was

Example 2 A polyethylene terephthalate film (T-60, manufactured by Toray) having a thickness of 50 μm was used as a base material, and a melamine-acrylic varnish (Matt varnish, manufactured by The Inktech Co., Ltd.) was used as a wire bar (#). After applying in 16), it was dried at 170 ° C. for 30 seconds to form a mat release layer (application amount 1 μm / dry). Then, an ionizing radiation-curable resin (HC-C (CS-530) manufactured by The Inktech Co., Ltd.) was applied on the mat release layer with a wire bar (# 16) to a thickness of 6 μm, and at 100 ° C. It was dried for 1 minute to form a release layer (hard coat layer). Next, an acrylic primer (H, manufactured by The Inktech Co., Ltd.
Gravure coat C primer A) to a thickness of 1 μm, and
After drying at 00 ° C for 1 minute to form the first primer layer, an acrylic primer (H Showa Ink Mfg. Co., Ltd., H
A C primer) to which 20 parts by weight of fine powder of tin oxide was added was gravure-coated to a thickness of 1 μm and dried at 60 ° C. for 1 minute to form a second primer layer. Then, a pattern was printed on the second primer layer with a printing ink (Showa Ink Mfg. Co., Ltd., GG) at a coating amount of 2 μm by gravure printing, and 6
After drying at 0 ° C for 1 minute to form a pattern layer, an acrylic resin adhesive (Showa Ink Industry Co., Ltd., H
S-32 mat) was gravure coated to produce a transfer foil. Using this transfer foil, an acrylic plate was painted in the same manner as in Example 1 and an ashing test was conducted, and good results were obtained.

Example 3 Instead of forming two primer layers between the release layer (hard coat layer) and the picture layer in Example 2, one primer layer was formed to produce a transfer foil. . That is, an acrylic primer (the
HC Primer A) manufactured by Inktech Co., Ltd., to which 20 parts by weight of fine powder of tin oxide is added, is gravure-coated at a thickness of 1 μm on the release layer (hard coat layer), and at 1 ° C. at 60 ° C.
After drying for 1 minute to form one primer layer, a pattern layer was formed thereon. Using the transfer foil thus produced, an acrylic plate was painted and an ashing test was conducted in the same manner as in Examples 1 and 2, and similarly good results were obtained.

[0017]

As described above, the antistatic transfer foil of the present invention is a transfer foil in which a release layer, a pattern layer and an adhesive layer are sequentially provided on a base material having releasability, and the release layer and the pattern are provided. Since the primer layer is provided between the layers and the conductive fine powder is added to the primer layer, the primer layer containing the conductive powder is not exposed on the surface after transfer molding, so that it is stable with time. The antistatic effect can be exhibited. Furthermore, by containing a surfactant in the release layer, both the release layer and the primer layer contain the antistatic agent, and thus a synergistic effect of these can provide a large antistatic effect. . Also,
Since the amount of expensive conductive fine powder used is small, the manufacturing cost can be kept low.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view for explaining an example of a transfer foil of the present invention.

[Explanation of symbols]

 1 Base Material 2 Release Layer 3 Picture Layer 4 Adhesive Layer 5 Primer Layer

Claims (3)

[Claims] 1. A transfer foil comprising a release layer, a release layer, a pattern layer, and an adhesive layer, which are sequentially provided on a base material having a release property, and a primer layer is provided between the release layer and the pattern layer. An antistatic transfer foil comprising the addition of powder. 2. The antistatic transfer foil according to claim 1, wherein a surfactant is added to the release layer. 3. The antistatic transfer foil according to claim 1, wherein the release layer is made of an ionizing radiation curable resin.