JPS61114892A - Base material for transfer - Google Patents

Abstract

PURPOSE:To form clear patterns even where a color copy in a sublimable dye is used as an original for transfer, by providing an acryl-melamine thermosetting resin film layer on the surface of an aluminum material provided with an oxide film layer. CONSTITUTION:The surface of an aluminum material used as a base material is preliminarily subjected to oxidation to provide an oxide film, and an acryl- melamine thermosetting resin layer provided thereon is thermally treated to obtain a base material for transfer which comprises a resin film layer with high hardness at the surface. When a pattern is transferred under heat and pressure from an original consisting of a color copy with a pattern formed in a sublimable dye, carbon particles to not enter into the surface resin layer. Accordingly, the particles can be easily removed by simply wiping the surface with a solvent such as an alcohol after transfer, and clear patterns can be transferred.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a transfer base material, and more specifically, the present invention relates to a transfer base material, and more specifically, a color copy on which a picture pattern is formed using sublimation dye is used as a transfer base paper, and a base material to which the pattern is transferred by heating and pressure is used. Regarding materials.

(Prior art) Conventionally, a color copy with a pattern formed using sublimation dye is used as a transfer original, and the base material to which this is transferred is a molded product made of polyester, acrylic, nylon 66, epoxy resin, etc. Metal plates and the like coated with these resins are known.

However, when the pattern is transferred onto these substrates, black spots appear on the surface, and this phenomenon is particularly noticeable when the base of the substrate is colored in a light color, significantly reducing the product value. There were drawbacks.

According to the inventor's research, this phenomenon is caused by creating a transfer original by color copying, and that the black spots are carbon particles in the toner used for color copying using sublimation dye. It has been found that this occurs because the carbon particles penetrate into the resin layer on the surface of the base material and cannot be easily removed.

(Object of the Invention) The present invention aims to eliminate the drawbacks of the conventional transfer base materials, and provides a transfer base material that can form a clear pattern even when a color copy using sublimation dye is used as a transfer original. It is something.

(Structure of the Invention) As a result of examining the material of the transfer base material based on the above knowledge, the present inventor found that if the base material has a specific resin film formed on the surface, carbon particles will not easily enter the resin layer. The present invention was completed by discovering that it can be removed. To summarize the present invention, it is a sublimation dye color copy transfer substrate formed by forming an acrylic-melamine thermosetting resin film layer on the surface of an aluminum material having an oxide film layer formed thereon.

To explain the present invention in more detail, the aluminum material used as the substrate is one whose surface has been previously oxidized to form an oxide film. The oxidation treatment may be either anodic oxidation treatment or chemical conversion treatment, and an oxide film is formed by a commonly used method. The acrylic-melamine thermosetting resin film is formed by coating with a thermosetting water-based paint consisting of a composition of acrylic resin and melamine, containing 50 to 5 parts by weight of melamine to 50 to 95 parts by weight of acrylic resin, and then heating. It is done.

Acrylic resin should be made dispersible in water by neutralizing at least a portion of the carboxyl groups in its molecules with a base, and melamine can be used in any form: water-soluble, sparingly water-soluble, or water-insoluble. .

For forming the acrylic-melamine thermosetting resin layer, methods such as electrophoretic coating, dip coating, electrostatic coating, spray coating, and brush coating can be applied. The resin layer formed on the aluminum oxide film is heat treated at 100 to 250°C for 1 to 60 minutes.

As a result, a transfer base material with a highly hard resin film layer formed on the surface is obtained, and even if a color copy with a pattern formed with sublimation dye is used as a transfer document and the pattern is transferred by heating and pressure, the surface Carbon particles do not enter the resin layer, and after transfer, they can be easily removed by simply wiping the surface with a solvent such as alcohol, and a clear pattern can be transferred.

The transfer substrate of the present invention is made of aluminum on which an oxide film has been formed, which has superior adhesion to the thermosetting resin film layer compared to those made of aluminum without oxidation treatment. This is because it has the advantage of not causing cracks in the cut portion even when the material is cut.

If it is necessary to color the transfer substrate of the present invention in advance, a method of oxidizing aluminum or immersion or electrolytic treatment in a coloring bath after forming an oxide film, or an acrylic-melamine thermosetting method can be used. It is sufficient to use a resin water-based paint in which a coloring agent such as a dye, pigment, or polymer pigment is added and mixed. As an example of using the transfer base material of the present invention, a transfer document on which a picture pattern has been formed by color copying using sublimation dye is placed on the surface of the base material,
Transfer is performed by applying pressure with a heat plate or the like at 0 to 250°C for 30 seconds to 3 minutes.

(Examples of the Invention) In order to explain the present invention more specifically, Examples are shown below. Example 1 A 11-tall beaker was filled with an acrylic melamine thermosetting water-based resin paint (trade name: Vanillaite A180ON, manufactured by Honey Kasei Co., Ltd.) with a resin solid content of 8% by weight, and an aluminum plate was subjected to normal anodizing treatment. is the anode,
A voltage of 180 volts was applied between the counter electrode and the stainless steel plate, and direct current was applied for 2 minutes to perform electrodeposition coating.

Next, the aluminum plate was pulled out of the paint, washed with water, and then heated and dried at 180°C for 30 minutes to obtain a transfer substrate.

A color copy transfer original with a pattern formed using sublimation dye using a 1m copy (product name:
After performing the transfer treatment at 80° C. for 40 seconds, the surface of the substrate was lightly wiped with a cloth impregnated with methyl alcohol, and a clear pattern was transferred into the resin film.

Comparative Example 1 In the method of Example 1, an acrylic thermosetting resin paint was used instead of an acrylic-melamine thermosetting resin paint, and roll coating was applied to an anodized aluminum plate to form a coating film. The resulting layer was dried at room temperature to obtain a transfer substrate.

When this base material was used for transfer in the same manner as in Example 1, small black spots remained on the resin film surface of the base material and did not come off even when wiped with a cloth impregnated with methyl alcohol, leaving a clear pattern. The appearance was inferior because it could not be changed.

Claims (1)

[Claims] A sublimation dye color copy transfer substrate comprising an acrylic-melamine thermosetting resin film layer formed on the surface of an aluminum material having an oxide film layer formed thereon.