JPS5943596B2 - Sublimation transfer printing method for synthetic resin moldings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sublimation transfer printing method for applying a desired pattern to a relatively small synthetic resin molded article, such as a decorative item such as a button.

2. Description of the Related Art A known method for applying colored patterns to decorative items such as buttons made of synthetic resin is to knead coloring agents such as pigments into synthetic resin.

In that case, it is known that by appropriately controlling the mixing and dispersion of the colorant, it is possible to obtain flowing patterns, shading patterns, or pearl-like patterns.

However, with such a method, it is difficult to obtain a desired uniform flow pattern in large quantities.

For this reason, there is a method of printing after forming the button, but pigment printing has problems in terms of friction fastness, and other conventional printing methods have problems in terms of fastness, etc.
Other conventional general printing methods require complicated steps such as color development and washing steps, and are not necessarily preferable.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method that can easily apply a desired uniform pattern to a large amount of synthetic resin products at the same time.

That is, in this invention, a plurality of synthetic resin molded articles are arranged and placed on a support stand in a two-dimensional manner, the surroundings are surrounded by a heat insulating material, and a sublimable dye is further applied onto these synthetic resin molded articles. The present invention provides a sublimation transfer printing method for synthetic resin molded articles, which comprises polymerizing a transfer paper and heating it under reduced pressure, thereby applying a desired pattern to the synthetic resin molded article.

The synthetic resin products to which this invention can be applied are thermoplastic resin or thermosetting resin molded products, and are particularly effective for relatively small products such as decorative items such as buttons.

The method according to the present invention will be specifically explained using buttons as an example with reference to the drawings. As shown in FIGS. 1 and 2, a large number of buttons 2 are placed on a metal frame 1 with the surface to be dyed facing upward. They are arranged in parallel in a plane and surrounded by a heat insulating material 3 made of foam or the like.

If this heat insulating material 3 is not applied, during sublimation transfer processing later, the color tone of the buttons 20 arranged around the frame 10 will be darker than that of the buttons 2 arranged in the center, and the entire button 2 will be uniform. is not colored.

This is considered to be an effect of heat conduction from the periphery of the frame 1.

Therefore, in this invention, by arranging the heat insulating material 3 around the frame 10, the heat conduction to the button 2 around the frame 1 is reduced, and the entire button 2 is successfully dyed uniformly. be.

Therefore, the width etc. of this heat insulating material 3 are appropriately selected in consideration of the size, thickness, etc. of the button 2.

Next, a transfer paper 4 with a desired pattern is placed on the top surface of the button 2.

This transfer paper is made of a synthetic resin film, a synthetic resin coating layer, or a synthetic resin fiber coated with heat-melting and sublimable dyes, mainly disperse dyes, as in the past.

Incidentally, as shown in FIG. 1, a spacer 4 made of, for example, a cushioning material may be laid in advance on the bottom of the frame 1, and the button 2 may be placed thereon.

The spacer 5 has various thicknesses depending on the thickness of the button 2.

In other words, the thickness of the spacer 5 affects the transfer pressure, so if you want to faithfully reproduce the pattern on the transfer paper 4, the thickness of the spacer 5 should be increased, and conversely, if you want to dye it in a shading tone, use a thinner spacer 5. The transfer paper 4 is set so as to form a space between the transfer paper 4 and the top surface of the button 2.

Next, the frame 1 is housed in a vacuum transfer device as shown in FIG. 3, for example, and transfer is performed.

This vacuum transfer device consists of a stand 6, a lid 8 that is in close contact with the stand 6 and can form a vacuum chamber 7, a movable stand 9 that is also placed on the stand 6 and supports the frame 1, and a transfer sheet. A heating plate 10 for heating 4 etc., and the lid body 8 and the heating plate 10
It mainly consists of a cylinder 11 that is moved up and down, and means (not shown) for evacuating the inside of the chamber γ.

When subjecting a synthetic resin molded article to sublimation transfer printing, if the heating temperature is too high, the molded article may become soft and deformed by pressure.

Therefore, it is necessary to appropriately select the transfer temperature and pressure depending on the type of synthetic resin.

In this way, the button 2 subjected to sublimation transfer printing is attached to the frame 1.
Both the buttons placed in the center of the frame 1 and the buttons placed around the periphery of the frame 1 are printed in the same color tone. Therefore, according to the present invention, buttons 2 having a pattern with an overall uniform color tone can be printed at the same time in an extremely simple process. Can be manufactured in large quantities.

That is, this invention utilizes the sublimation transfer printing method to discover a method for simultaneously manufacturing a large number of relatively small synthetic resin molded products, and also to surround the synthetic resin molded products to be dyed during the transfer process. By arranging the heat insulating material in this manner, uniform dyeing of the entire molded article is possible, and this provides remarkable effects such as simplifying the dyeing process and improving product yield.

As example transfer paper, disperse dye CI ARed 60 and C
An offset ink was created using a conventional method using I A B 1ue56 dye, and this was applied using the offset method.
01/rt1 Single-sided starch-coated paper with a blurred pattern printed on the starch side was prepared.

Furthermore, commercially available cushion paper was used as a heat insulator, and commercially available cushion paper was used as a spacer for adjusting the thickness of the buttons, and a large number of polyester resin buttons were arranged in the frame.

The above-mentioned transfer paper was placed on this button so that the ink side was in contact with the button surface, and the transfer paper was placed at 190° C. and under a reduced pressure of 10 torr at 35° C. using a batch-type vacuum transfer machine similar to that shown in FIG.
Transfer was performed under conditions of seconds.

As a result, all the buttons were dyed in a uniform, pearl-like pattern.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the state of the frame used for carrying out the transfer printing method according to the present invention and the button housed inside the frame, and FIG. 2 is a plan view of the frame shown in the sister figure 1.
and FIG. 3 is a sectional view showing an example of a sublimation transfer device. In the figure, 1 is the frame, 2 is the button, 3 is the insulation material, 4 is the transfer paper,
5 is a spacer, 6 is a stand, 7 is a chamber, 8 is a lid, 9 is a stand, 10 is a heating plate, and 11 is a cylinder.

Claims (1)

[Scope of Claims] 1. A plurality of synthetic resin molded articles are placed on a support stand in a two-dimensional arrangement, and are surrounded by a heat insulating material, and furthermore, a sublimable dye is applied on these synthetic resin molded articles. A method for sublimation transfer printing of synthetic resin molded articles, characterized in that the applied transfer paper is polymerized, heated under reduced pressure, and thereby a desired pattern is applied to the synthetic resin molded article. 2. Sublimation transfer printing of a synthetic resin composition according to claim 1, characterized in that a spacer is placed in advance at the bottom of the support base to adjust the space between the printing surface of the synthetic resin molding and the transfer paper. Law.