JPH04292982A - Method for printing ceramics molded body - Google Patents

Abstract

PURPOSE:To accurately apply printing of good quality to the surface of ceramics by a transfer method. CONSTITUTION:A protective film 5 is provided on the releasable surface 4 of a plastic film 3 and a color pattern 6 is printed on the protective film 5 using printing ink containing pigment for ceramics to form a transfer sheet 1. This transfer sheet 1 is used to print the color pattern 6 on the surface of a ceramics molded body 2 by a transfer method. A hot-melt resin layer 7 is provided on the surface of the ceramics molded body 2 and the transfer sheet 1 is placed on the hot-melt resin layer 7 so that the color pattern 6 comes into contact with said resin layer 7 and heated under pressure. The plastic film 3 is peeled off to transfer the color pattern 6 to the surface of the ceramics molded body 2 and, thereafter, the ceramics molded body 2 is baked.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for printing durable and high-quality colored patterns on the surface of ceramic molded objects such as ceramics, tiles, and glass.

0002

[Prior Art] In the past, transfer printing methods have been used to decorate ceramics, etc., but this method uses varnish printing on a mount and adheres powdered decorative pigments. It is placed on unglazed ceramics, wetted with water, the mount is peeled off, and the pigment is transferred to the ceramics, which is then fired.With this method, the mount is thick, so it is difficult to use it for painting on curved surfaces. In addition, because the mount is peeled off by wetting it with water, the design tends to be misaligned and transferred, which limits its use. Further, it was also impossible to transfer the image to a long object such as a wall material.

0003

[Problems to be Solved by the Invention] The present invention eliminates the drawbacks of such conventional methods and provides a method for printing colored patterns on ceramic molded bodies in general, regardless of size and shape, with high precision using a transfer method. The challenge is to provide the following.

0004

[Means for Solving the Problems] In the present invention, a plastic film having a releasable surface is used as a transfer sheet, a protective film is provided on the releasable surface, and on this protective film,
The above problems are effectively solved by manufacturing by printing colored patterns with printing ink using pigments for ceramics, and by providing a hot melt resin layer on the surface of the ceramic molded body that is the transfer target. did. Such a transfer sheet is placed so that the colored pattern is in contact with the hot melt resin layer provided on the Cetamix molded body, and after heating and pressure is applied, the plastic film is peeled off and the colored pattern is transferred to the ceramic surface. After the transfer, the ceramic molded body is fired according to a conventional method.

[0005] As the plastic film for manufacturing the transfer sheet, any of polyester film, polypropylene film, nylon film, etc. can be used, and cellophane, film laminates, etc. may also be used.
Generally, it is preferable to use a polyester film that has excellent dimensional stability. Although the thickness of the film is not particularly limited, it is preferable to use a relatively thin film with a thickness of 12 to 50 microns in order to accurately transfer onto curved surfaces of ceramics. Although a plastic film having an inert and highly releasable surface may be used as is, it is preferable to impart mold releasability to the surface by applying a mold release agent such as a silicone resin.

Next, the protective film formed on the releasable surface of the plastic film protects the surface of the colored pattern after transfer, but since it disappears by baking after transfer, it generally does not have film-forming ability. Any synthetic resin can be used. The printing ink for forming the colored pattern may be produced in the same manner as a normal printing ink, except that a pigment generally known as a pigment for ceramics is used.

The transfer sheet thus formed is
In order to ensure reliable transfer, as the hot melt resin layer formed on the surface of the ceramic substrate, any commercially available hot melt resin can be used. For example, polyamide resin with a melting point of 90 to 150 °C Use is preferred.

[0008] In the present invention, on the surface of the ceramic molded body,
By providing a hot melt resin layer, the colored pattern can be placed on the surface of the ceramic molded object with great precision by placing the transfer sheet so that the colored pattern side is in contact with the hot melt resin layer and applying heat and pressure. It can be transferred stably, and by using a flexible and relatively thin sheet as the plastic film that is the transfer sheet base material, even if the surface of the ceramic molded object has unevenness, it can be transferred along the unevenness. Stable transfer printing becomes possible.

[0009] Transfer conditions vary depending on the type of hot melt resin used, but it is usually sufficient to press with a hot roll at 130 to 150°C.

[0010] After the colored pattern is transferred to a ceramic molded body such as tile, ceramics, glass, etc. in this way, the colored pattern is transferred to the surface of the ceramic molded body by firing the ceramic molded body at a temperature of 800°C or higher. Prints stably and clearly with a very high gloss.

[0011]

[Embodiment] Next, an embodiment of the present invention will be described with reference to FIG. In this example, a polyester film with a thickness of 25 microns is used as the base film 3, a release layer is provided by applying silicone thereon, and an acrylic resin is thinly applied onto the release surface 4. A protective film 5 was provided, and a colored pattern 6 was printed on the protective film 5 using three types of printing ink using ceramic pigments of different colors to produce a transfer sheet 1. Separately, on the surface of the ceramic molded body (unglazed tile) 2, which is the object to be transferred, Laccamide 503 (powdered hot melt resin) manufactured by Dainippon Ink Co., Ltd. is dissolved in methanol, sprayed, dried, and hot A melt resin layer 7 was provided. The transfer sheet 1 was stacked on this hot melt resin layer 7 so that the colored pattern 6 of the transfer sheet 1 was in contact with the hot melt resin layer 7, and after heating and pressing with a hot roll at 130° C., the base film 3 was peeled off. Thereafter, in this way, the ceramic molded body 2 with the colored pattern 6 transferred thereto is coated with approximately 800 to 800 mm
It was fired at 50°C. By this firing, the resin contained in the protective film 5 and the colored pattern 6 was burnt out, and the colored pattern was baked and printed on the surface of the ceramic molded body 2 with high gloss and clarity.

0012

Effects of the Invention According to the present invention, colored patterns can be accurately printed on ceramic molded objects in general, such as ceramics, tiles, glass, roof tiles, etc., regardless of size and shape, by a transfer method. Therefore, the method of the present invention is also useful for printing wood grains on noncombustible ceiling panels (noncombustible ceiling panels) and for manufacturing stained glass. In addition, since it is easy to form a waterproof colored surface and it is easy to print on long objects, it is also possible to print on external wall materials and the like.

[Brief explanation of drawings]

FIG. 1 is a manufacturing process diagram showing one embodiment of the present invention.

[Explanation of symbols]

1 Transfer sheet 2 Ceramic molded body 3 Film 4 The releasable surface 5 Protective film 6 Colored pattern

Claims (1)

[Claims] 1. A protective film 5 is provided on the releasable surface 4 of a plastic film 3 having a releasable surface 4, and a colored pattern 6 is formed on the protective film 5 with printing ink using a pigment for ceramics. A printed transfer sheet 1 is used to transfer and print a colored pattern 6 on the surface of a ceramic molded body 2 by a transfer method, and a hot melt resin layer 7 is provided on the surface of the ceramic molded body 2. , place the colored pattern 6 of the transfer sheet 1 on the hot melt resin layer 7 so as to be in contact with it, and after heating and pressing, peel off the plastic film 3 and transfer the colored pattern 6 to the surface of the ceramic 2; after that,
A method for printing on a ceramic surface, which comprises firing the ceramic molded body 2.