JPH0455872B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for producing a transfer material with excellent hiding power, and more specifically, a method for producing a transfer material with excellent hiding power, and more specifically, a method for producing a transfer material in which the color to be produced by a transfer printing method is not affected by the color of the object to be transferred. The present invention relates to a method of manufacturing a transfer material through a simple process.

[Conventional technology]

Conventionally, the method for decorating plastic containers, metal containers, etc. is to use a transfer material with transfer layers such as a release layer, colored ink layer, and adhesive ink layer provided on a base sheet, and then apply heat and pressure to the transfer layer. The so-called transfer printing method, which is a method of transferring images onto containers and the like, is often used. However, when using conventional transfer materials such as those mentioned above, unless the transfer layer of the transfer material has a dark color with low brightness that is close to black or black, the hiding power of the transfer layer is poor, and therefore the transfer layer may appear. There was a problem in that the color to be transferred was significantly affected by the color of the object to be transferred. One way to solve the above problem is to increase the hiding power by increasing the thickness of the colored ink layer in the transfer layer, but transfer materials configured in this way dry slowly and the transfer layer is separated from the base sheet. It has drawbacks such as being easy to lift up and the transfer layer not being sharp enough at the edges when a transfer process is performed. These drawbacks are due to the fact that the transfer layer is a thick film, and therefore it is necessary to make the transfer layer as thin as possible. In view of this need, a transfer material was invented in which a metal vapor-deposited layer was provided between the colored ink layer and adhesive ink layer of the transfer layer (Utility Model Application No. 52-136706).
(Refer to Publication No. 53-14242).

[Problem to be solved by the invention]

However, the above-mentioned transfer material had problems in its manufacturing method. In other words, to obtain this transfer material,
It requires three steps: printing, vapor deposition, and printing. Since the vapor deposition process is carried out in a vacuum, it is not possible to install the printing device and the vapor deposition device in-line, and the base sheet on which the release layer and colored ink layer are printed is once rolled up and transferred to the vapor deposition device, and the vapor deposition is performed. It is necessary to form a metal vapor deposition layer thereon, then wind up the base sheet again and transfer it to a printing device to print an adhesive ink layer. Therefore, (1) it is necessary to transfer the base sheet from the printing device to the vapor deposition device to the printing device, which not only reduces work efficiency, but also (2) when setting the substrate sheet in the printing device or vapor deposition device. Furthermore, because a certain length of the base sheet is lost due to passing the base sheet through each device, so-called printing loss occurs in each process, so the printing loss becomes large. Furthermore, (3) since the above-mentioned steps are carried out before the transfer material is completed, it takes time to evaluate the concealability of the final product, which poses a problem in quality control. Also,
(4) Since high-temperature heating is performed during the vapor deposition process and the base sheet is transferred during each process, the base sheet expands and contracts, making registration difficult in the subsequent printing process. It is an object of the present invention to solve the above-mentioned problems and provide a method for manufacturing a transfer material with excellent shielding power through simple steps.

[Means to solve the problem]

That is, the present invention provides a concealing method characterized in that a release layer, a colored ink layer, a shielding layer made of ink containing scale-shaped aluminum powder, and an adhesive ink layer are sequentially formed on a base sheet by a printing method. This is a method for manufacturing a transfer material with excellent strength. This invention will be explained in more detail with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a transfer material having excellent hiding power obtained by the present invention. Second
Figures 1 to 4 are cross-sectional views showing other embodiments of transfer materials with excellent hiding power obtained by the present invention. 1 is a base sheet, 2 is a release layer, 3 is a colored ink layer, 4
denotes a shielding layer made of ink containing scale-shaped aluminum powder, 5 denotes an adhesive ink layer, 6 denotes a transfer layer, 7 denotes a matting agent layer, and 8 denotes a shielding layer made of ink containing scale-shaped aluminum powder having adhesive properties. . The base sheet 1, release layer 2, colored ink layer 3, and adhesive ink layer 5 used in this invention are not particularly different from conventional transfer materials, and commonly used materials can be selected and used according to the purpose. good. As the base sheet 1, materials used as base sheets for ordinary transfer materials are used, such as plastic films such as polyester, polyethylene, and polypropylene, paper, or composite films thereof. In order to improve the releasability of the base sheet 1, it is preferable to apply a silicone coat or a wax coat to the base sheet 1. First, the release layer 2 is formed on the base sheet 1 by a printing method. For the release layer 2, thermoplastic resin, natural rubber, synthetic rubber, or the like is used. Subsequently, a colored ink layer 3 is formed on the release layer 2 by a printing method. As the colored ink layer 3, a colored ink made of ordinary pigments or dyes, binders, additives, etc. is used. Furthermore, a shielding layer 4 made of ink containing scale-shaped aluminum powder is formed on the colored ink layer 3 by a printing method. A feature of the present invention is that a shielding layer 4 made of ink containing scale-shaped aluminum powder is interposed between a colored ink layer 3 and an adhesive ink layer 5 to be described later. The shielding layer 4 made of ink containing scale-shaped aluminum powder completely blocks the color of the transferred object after the transfer printing process, and prevents the color that is about to appear on the transferred object when decorating a plastic container or the like. This is provided in order to avoid being affected by the color of the object to be transferred. The shielding layer 4 made of ink containing scale-shaped aluminum powder having such a function is formed using an ink in which aluminum powder or aluminum paste is dispersed and mixed in an appropriate resin and solvent. Aluminum paste is commercially available,
Generally, the raw materials are aluminum foil, stearic acid or oleic acid, and mineral spirits. The shape of the aluminum particles is scale-like, and the particle size varies from a fine particle size of about 5 μm to a particle size of about 50 μm. In order to achieve the purpose of this invention, aluminum particles with a relatively small particle size are suitable, with an average particle size of about 10 μm.
m aluminum powder or aluminum paste is preferred. If such aluminum powder or aluminum paste is used, sufficient effects can be obtained in the structure of the transfer material with a shielding layer made of ink containing scale-shaped aluminum powder having a layer thickness of 2 to 3 μm. The ratio of aluminum powder or aluminum paste mixed into the resin and solvent mixture depends on the printing speed, printing method,
It is best to choose the most stable and economical ratio by considering the drying method, amount of ink transfer, etc. Finally, the adhesive ink layer 5 is formed by a printing method on the shielding layer 4 made of ink containing scale-shaped aluminum powder. As the adhesive ink layer 5, a heat-sensitive or pressure-sensitive resin suitable for the surface material of the object to be transferred, such as a plastic container, is appropriately used.
For example, if the material to be transferred is AS resin, use an acrylic type or vinyl chloride vinyl acetate copolymer type.
In the case of polypropylene, chlorinated polypropylene, ethylene vinyl acetate, etc. are used. As described above, the transfer body obtained by this invention has a release layer 2, a colored ink layer 3, an aluminum ink layer 4, an adhesive ink layer 5 on a base sheet 1.
are sequentially formed by a printing method, but other configurations may be used depending on the type of object to be transferred, the type of decorative pattern to be formed, etc. For example, in order to make a partially matte part appear, a matting agent layer 7 is provided on the base sheet 1 (see Fig. 2), a shielding layer 4 made of ink containing scale-shaped aluminum powder, and an adhesive ink. In place of the layer 5, there may be provided a shielding layer 8 made of ink containing scale-shaped aluminum powder and having adhesive properties and having the functions of both layers (see FIG. 3). Furthermore, for application to instrument panels of automobiles, etc., a shielding layer 4 made of ink containing scale-shaped aluminum powder is used.
It is also possible to obtain partially transmitted light by providing a transparent plate partially and performing a transfer printing process on a transparent plate (see FIG. 4). In addition, when applying in this way, it is necessary to use transparent colored ink for the colored ink layer 3.

【Effect of the invention】

The method for producing a transfer material with excellent hiding power according to the present invention includes sequentially printing a release layer, a colored ink layer, a shielding layer made of ink containing scale-shaped aluminum powder, and an adhesive ink layer on a base sheet using a printing method. Since the structure is configured so as to be formed, it has the following effects. That is, each layer is formed on the base sheet continuously by a printing method, resulting in high work efficiency. In addition, since it does not include a vapor deposition process and only involves a printing process, there is less occurrence of printing loss. Further, since the transfer material is obtained by continuous printing only in the printing process, the final product can be completed in a short time, evaluation can be performed immediately, and quality control is easy. Furthermore, since there is no vapor deposition process or transfer of the base sheet, the base sheet is less likely to expand or contract, and each layer can be easily aligned. Therefore, according to the method of the present invention, it is possible to easily produce a transfer material in which the color to be produced by the transfer printing method is not affected by the color of the object to be transferred. .

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a transfer material having excellent hiding power obtained by the present invention. Second
Figures 1 to 4 are cross-sectional views showing other embodiments of transfer materials with excellent hiding power obtained by the present invention. DESCRIPTION OF SYMBOLS 1... Base sheet, 2... Peeling layer, 3... Colored ink layer, 4... Shielding layer made of ink containing scale-shaped aluminum powder, 5... Adhesive ink layer, 6
... Transfer layer, 7 ... Matting agent layer, 8 ... Shielding layer made of ink containing scale-shaped aluminum powder having adhesive properties.

Claims (1)

[Scope of Claims] 1. On a base sheet 1, a release layer 2, a colored ink layer 3, a shielding layer 4 made of ink containing scale-shaped aluminum powder, and an adhesive ink layer 5 are successively formed by a printing method. A method for producing a transfer material having excellent hiding power. 2. A method for producing a transfer material with excellent hiding power according to claim 1, wherein the ink containing scale-shaped aluminum powder contains scale-shaped aluminum powder or paste with an average particle size of about 10 μm. .