JPS6343234B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transfer dyeing method, and in particular, forms unevenness on an anodized aluminum film and dyes the concave and convex portions in different colors to create a three-dimensional effect. This paper relates to a transfer dyeing method for forming a certain pattern.

(Prior Art) Conventionally, there has been known a method of forming irregularities on an anodized aluminum film and dyeing the concave and convex parts in different colors to create a pattern that matches the irregularities. For example, double alumite. This is called the dyeing method. This method involves the process of anodizing aluminum to form an oxide film, dyeing and sealing the entire surface, applying varnish that is resistant to alkali in the pattern and alkali treatment, and removing the oxide film from the areas where varnish is not applied. The process consists of a step of removing the film to expose the aluminum substrate, a step of anodizing again to form an oxide film, a step of dyeing and sealing the entire surface, a step of peeling off the varnish, and a step of polishing. However, this method has the drawback that the entire surface is dyed twice, which wastes a large amount of dye, and that precise and delicate patterns cannot be obtained.

(Problems to be Solved by the Invention) The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to provide an uneven transfer dyeing method for anodized aluminum films that wastes less dye and produces delicate patterns. With the goal.

(Means for Solving the Problems) That is, the present invention prints on an anodic oxide film of aluminum with an ink that contains a dye for dyeing alumite, does not transmit disperse dyes, and contains a varnish that is resistant to sandblasting. After sandblasting and peeling off the oxide film in areas without a printed pattern, and sealing, anodizing is performed again. Next, a transfer sheet carrying a disperse dye is placed on the anodized film, transfer dyeing is performed, and the pores are sealed. This is a transfer dyeing method characterized by peeling off the ink film and polishing it.

(Function) According to the present invention, the convex portions of anodized aluminum are dyed with the dye in the ink (an ink containing an alkoid dye, a varnish that does not pass through disperse dyes and is resistant to sandblasting), and the concave portions is dyed by the dye in the transfer sheet. Both dyes enter the pores of the anodic oxide film by heating, and are prevented from falling off by the pore sealing treatment.

(Specific Description of the Present Invention) The present invention will now be described in detail with reference to the drawings. Each of the drawings is an explanatory diagram showing each step of the present invention.

The printing medium 1 of the present invention may be anything as long as it has an aluminum surface, such as an aluminum plate,
Alternatively, cylindrical aluminum or the like can be used.

The surface of this printing material 1 is anodized and then printed with an ink 2 containing a dye for dyeing alumite, a varnish that is impermeable to disperse dyes and resistant to sandblasting (FIG. 1a). Any well-known dye may be used as the dye, and since the varnish must have hardness to withstand the required sandblasting, for example, a dye containing acrylic acid amide as a main component may be used.

Thereafter, sandblasting is performed to remove the anodic oxide film in the part A where the ink 2 is not present, and the dye is transferred and penetrated into the anodic oxide film in the part B where the ink 2 is present by the heat generated during sand blasting. Note that the anodic oxide film is generally porous, and it is thought that the dye migrates and permeates into these pores (1st b).

Then, the pores are sealed (FIG. 1c). The sealing treatment can be performed by a well-known method, for example, by boiling in a boiling liquid containing a sealing agent. The pore sealing treatment prevents the dye that has penetrated into the pores from falling out. Note that, prior to the sealing treatment, a heat treatment can be performed to further penetrate the dye into the anodic oxide film.

The entire surface is then anodized again (FIG. 1d). It is substantially the portion A where the ink 2 is not present that is oxidized.

Thereafter, transfer sheets 3 having a printed pattern on the entire surface or in part are overlapped and transfer dyed (FIG. 1e). Transfer dyeing can be performed in various ways, for example, ink 32 containing a sublimable disperse dye is applied to base sheet 31.
The transfer sheet supported on the anodized film is layered on top of the anodic oxide film.
This can be done by a method of transferring only the dye by heating. Alternatively, a transfer sheet having at least a release layer and an ink layer on the base sheet, and optionally an adhesive layer, etc., may be placed on the anodized film, and the ink layer may be transferred by heating and pressing. can.

After transfer staining, sealing treatment is performed (FIG. 1f).
The sealing treatment can be performed by a well-known method, for example, by boiling in a boiling solution containing a sealing agent.

Thereafter, the ink film 2 and the ink film adhered during transfer dyeing are peeled off (FIG. 1g). Peeling may be done by a physical method or by using a solution that dissolves the ink film. After this, it is further polished and finished to obtain the desired product.

(Effects) The resulting product has unevenness and a pattern that is in sync with the unevenness, and the same pattern as that of the transfer sheet used for transfer dyeing can be reproduced. When printed, it is possible to obtain the precise and delicate patterns characteristic of these printing methods.

Example 1 An aluminum cylindrical bottle cap was buffed and chemically polished, and then anodized to form an oxide film with a thickness of 10 μm. Thereafter, an ink containing 10% by weight of Sumikalon Yellow E-4GL (sublimable disperse dye manufactured by Sumitomo Chemical Co., Ltd.) and containing polyacrylamide as a main component was printed by silk screen printing. After this ink was air-dried, the oxide film was removed by sandblasting, leaving the printed pattern portion. This was heated at 200℃ for 10 minutes to transfer the dye to the oxide film, then treated in boiling liquid containing a sealant for 10 minutes to seal the pores, washed with water, and then anodized again to give a film thickness of 10μ. An oxide film was obtained. A transfer sheet printed with ink containing a black sublimable dye was wrapped around this cap, the ends were secured with heat-resistant cellophane tape, and the dye was transferred by heating at 200°C for 10 minutes. Thereafter, the pore sealing treatment was performed again, and the ink film was dissolved in a mixed solution of water and alcohol, and after drying, it was polished and finished. The obtained cap had irregularities, the convex portions were gold colored, and the concave portions were dyed black.

Example 2 Instead of the transfer dyeing in Example 1, a transfer sheet was used, in which a 25 μm polyester film was coated with an acrylic release agent, a cellulose ink containing a sublimable dye, and a polyamide adhesive in this order. The release agent, ink, and adhesive were transferred to the cap by heating and pressing. Thereafter, it was heated at 200° C. for 1 minute to perform a sealing treatment, and the release agent, ink, and adhesive were peeled off and polished using trichloride. Similarly, a well-dyed cap was obtained in which the convex portions were gold and the concave portions were black.

[Brief explanation of drawings]

The drawings are all explanatory diagrams showing the implementation steps of the present invention, and FIG. 1a shows the printing process, FIG. 1b shows the sandblasting process, FIG. 1c shows the pore sealing process, FIG. 1d shows the anodizing process, FIG. 1e shows a transfer process, FIG. 1f shows a sealing process, and FIG. 1g shows a peeling process. 1... Printing material, 2... Ink, 3... Transfer sheet, 31... Base sheet, 32... Ink containing disperse dye.

Claims (1)

[Scope of Claims] 1. After printing on an anodic oxide film of aluminum with an ink containing a dye for dyeing alumite, a varnish that is impermeable to disperse dyes and resistant to sandblasting, sandblasting is performed to remove the areas without printed patterns. After peeling off the oxide film and sealing, it is anodized again, then a transfer sheet carrying a disperse dye is placed on the anodized film, the disperse dye is transferred to the anodized area, the pores are sealed, and the ink is applied. A transfer dyeing method characterized by peeling off the film and polishing it. 2. The transfer dyeing method according to item 1, wherein the transfer dyeing is carried out by placing a transfer sheet carrying a sublimable disperse dye on the anodic oxide film and heating it to transfer only the dye. 3. The transfer dyeing is carried out by a method in which a transfer sheet having at least a release layer and an ink layer containing a disperse dye on a base sheet is superimposed on the anodized film, and the ink layer is transferred by applying heat and pressure. Transfer staining method according to item 1.