KR860000317B1 - Printing process on polyester film - Google Patents

Abstract

Polyester film is printed by treating it with 0-phenyl phenol solution, by attaching to the film paper printed with subliming polyester dye having 120 - 150≰C sublimation temperature on the surface of the film, and by heating and pressing at 120 - 150≰C. Pretreatment with 2 - 5% 0-phenyl phenol solution dissolved in methanol, ethanol, or sodium hydroxide facilitates dye penetration by relaxation and swelling of dense structures in the film.

Description

Printing method of polyester film

The present invention relates to a method of printing a character, a figure, and the like on a polyester film, and more particularly, to a method of thermally dye-transferring a character, a figure, etc. printed on a transfer paper on a rigid polyester film.

Conventionally, a method of transferring a figure printed on a transfer sheet to a synthetic resin is known. For example, it has been known to print an arbitrary figure or character on a transfer paper, treat the printed surface on a synthetic resin, and then heat-press the transfer layer so that the print layer of the transfer paper is transferred to the synthetic resin surface. Since the printed layer is formed to protrude, the printed layer is easily worn out and shows a problem that the product value is lowered when used for a certain period of time. In order to improve the drawbacks of the conventional method, a method was developed in which a printing layer of a transfer paper was penetrated into a synthetic resin by printing on a transfer paper using a sublimable dye and then treating the transfer paper on a synthetic resin surface and heat-compressing at a high temperature of 200 ° C. or higher. .

However, this method was applied only to the plate-shaped acrylic resin. In this case, since the heating temperature should be 200 ° C. or higher, when the to-be-printed film is a film, the problem of distortion of the to-be-printed material due to heating appears and it is known as a method that can be used only for the acrylic plate. It has been thought that it cannot be used for other types of synthetic resins.

The present inventor attempts to transfer characters or figures required for a transparent polyester film to be used as a commemorative plaque or a plaque of a plaque, and as a result, a transfer method for a conventional synthetic resin has a severe deterioration of printed characters or figures, resulting in a decrease in product value. Since it was not possible to use it and tried to transfer it to the acrylic resin plate as it is, when the film is stretched and heated at a high temperature of 200 ° C. or higher, the film is crushed, and the required shape cannot be obtained. It has been found that one known transfer method is not available for polyester films.

In particular, the polyester film is difficult to dye due to the high crystallinity of the polyester resin and the compactness of the molecular arrangement, which makes printing by the transfer method difficult compared to other resins.

In the present invention, the polyester film is not thermally deformed at about 120-150 ° C., so it is transferred in such a temperature range, but before the transfer, the polyester film is pretreated to relax the dense tissue and facilitate the penetration of the dye, thereby facilitating the penetration of the dye. When the transfer paper printed using the transfer paper is transferred, the dye penetrates into the tissue of the polyester film, so that the dyeing effect is improved, and as a result, the transferred print layer is not worn or peeled off, thereby completing the present invention. It is.

According to the method of the present invention, a dye for printing on a transfer sheet uses a polyester-based sublimable disperse dye. Particularly suitable dyes suitable for the present invention are CIBACET (dyed by CIBACET, a Swiss brand of Sivari Limited) disperse dye at 120-150 ° C., and the transfer paper is printed on imitation paper and the like by a conventional method.

The polyester film is used by immersing in a solution in which o-phenol phenyl is dissolved in alcohol or sodium hydroxide solution such as methanol, ethanol or the like as described above on the transfer surface of the film before transferring to the transfer paper.

Treatment of the polyester film with o-phenylphenol solution relaxes and swells the structure of the film to facilitate penetration of the dye.

Hereinafter, the method of the present invention will be described.

Dissolve o-phenyl phenol in alcohols such as methanol and ethanol to make a 2-5% solution and apply the solution to the surface to be transferred to the polyester film or dip the film in the solution and take it out to dry. Immediately after drying, the printing surface of the transfer paper printed with Shivaset dispersion dye on the surface to be printed on the film is treated and heated and pressed at 120-150 ° C. for 20 seconds to 1 minute, and the transfer paper is removed.

According to the method of the present invention, the dye is sublimed into the tissue of the polyester film whose surface structure is relaxed by o-phenylphenol, and the dye used is integrated into the film structure after being penetrated because it is a polyester-based dispersion dye. Even if the surface of the film is worn out or washed with detergent, the printed layer is not peeled off.

The polyester film manufactured by this invention can be used for various uses, such as a memorial plaque, a pattern plate for plaques, a book cover, and a decorative transparent film.

EXAMPLE

5 g of o-phenylphenol is dissolved in 500 ml of ethanol and diluted with water to make a 0.5% o-phenylphenol solution. The polyester film is immersed in this solution, and then dried. The printing surface of the transfer paper printed with the printing ink of polyester-based shivaset disperse dye is welded on the surface of the film, and the film and the transfer paper are put between the two flat plates and pressed at a temperature of 150 ° C. for 1 minute, then the top plate and the transfer paper are pressed. It is removed and a transferred polyester film is obtained.

Claims (1)

Treating the polyester film with o-phenylphenol solution and treating the printed surface of the transfer paper printed with the polyester-based sublimation component acid dye having a sublimation temperature of 120-150 ° C. on the surface thereof, and then heat-compressing at 120-150 ° C. Printing method of polyester film.