Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1985-09-05
1987-05-19
Kittle, John E.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428211, 427 531, 427149, 522121, B32B 300, C08F 800, B41M 312
Patent
active
046667563
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a printed transfer paper for decorating pottery which is used in decorating of pottery, more particularly, to a printed transfer paper for decorating pottery which employs a novel binder for a decorating ink layer (hereinafter, referred to squeegee oil) and/or a novel cover coat agent.
BACKGROUND OF THE INVENTION
As one method for decorating pottery, it is known to use a transfer paper which is printed with a decorating ink layer containing a color pigment for pottery on a base paper, which is coated by a size such as dextrin solution and dried, and on which a cover coat layer is printed. This method is the so called "slide" transfer method by water, and comprises separating an integrated cover coat layer and decorating ink layer from a base paper in water, bringing the decorating ink layer into contact with pottery to mount it on the surface thereof and drying, and then, baking the cover coat layer, ink and binder at a high temperature to effect decorating.
A squeegee oil or a cover coat agent of a printed transfer paper for decorating pottery now employed is mainly a solvent type polymethacrylate ester type resin, which has many problems that to be solved and provides a severe problem in ceramic industry.
That is, such printed transfer paper has following many defects: generally contains a solvent having a high boiling point such as toluene, xylene, dimethybenzene, ethylbenzene, triethylbenzene, trimethylbenzene ethylene glycol monobutyl ether, ethylene glycol monoethyl acetate, to prevent clogging in a screen printing plate, and hence, it produces a low drying velocity and a less improved productivity rate. as air pollution as a result of the solvent used in the solvent type resin. This defect should be solved quickly because of safety and sanitary conditions and working and environmental disruption. type squeegee oil, particularly, in multicolor printing because of the low drying velocity of the oil. type resin and, therefore, it is difficult to obtain a fine design. blocking of printed transfer paper by residual solvent because of its low drying velocity. pottery has to be sandwiched by paraffin papers or the like to prevent blocking. employs a solvent type resin for a cover coat is liable to change with time and it loses flexibility resulting in loss of mounting ability during storage.
It is well known that, as resins for eliminating these defects of a solvent type resin, so called non-solvent type resins, ultraviolet curable resins have been considered, and various proposals have been made. Therefore, an attempt to apply an ultraviolet curable resin to decorating pottery has been considered and is known.
For example, Japanese Patent Laid Open Publication No. 115390/1982 proposes application of an ultraviolet curable resin to a squeegee oil and a cover coat agent of printed transfer paper for decorating pottery, but such an attempt has not yet been put into in practice. The main reason for this is that the resin has defects in its properties such as (1) no flexibility and less ability to be mounted, (2) high decomposition temperature and unfavorable color developing after baking.
The present inventors have proposed application of an ultraviolet curable resin to a squeegee oil (Japanese Patent Laid Open Publication No. 152993/1982) and also have proposed an application of ultraviolet curable resin to a cover coat layer (Japanese Patent Laid Open Publication No. 142385/1982), and thereafter have intensively studied these possibilities. As a result, it has been found that, although these resins have no defect, particularly, in mounting ability for a slide transfer onto a flat surface such as flat ware and tile, they have insufficient ability for slide transfer onto pottery having a considerably curved surface such as a green tea cup, a coffee cup, a bowl of pottery, a deep dish, a flower vase and a rice bowl, and readily produce a cleavage of a decorating ink layer.
DISCLOSURE OF THE INVENTION
Then, the present inventors further intensively
REFERENCES:
patent: 4113487 (1978-09-01), Matsunaga et al.
patent: 4379039 (1983-04-01), Fujimoto et al.
Miyake Hideo
Sakata Kazuhiko
Kittle John E.
Ryan Patrick J.
Toyo Boseki Kabushiki Kaisha T/U Toyobo Co., Ltd.
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