JPH0218148B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a heat-resistant base material having a partially matte surface,
The purpose is to obtain various types of heat-resistant substrates that can be decorated with different degrees of matte surfaces in a simpler process.

Conventionally, methods for forming a matte state on the surface of base materials such as glass and metal include sandplast method,
There are chemical corrosion methods, etc. However, all of these methods are time-consuming, and they also involve creating patterns by partially forming a matte state, varying the degree of matteness in some parts, or adding color to the matte parts. However, in the case of applying a masking process, a masking process is required, which has the disadvantage that the process as a whole becomes very complicated. In order to improve the drawbacks of the conventional method, the present applicant previously filed an application for a method for producing a heat-resistant base material that can easily form a matte surface (Patent Application No. 186257, filed in 1982). The main point of this method is
The point is that a resin layer containing an extender pigment is formed on the surface of the base material and then fired. This method simplifies the process,
It was easy to form a partially matte surface and a colored matte surface. However, in this method, it is only possible to form a matte surface with a certain degree of matteness, and it is therefore impossible to partially change the degree of matteness. Therefore, the resulting product was inferior in design.

In view of the drawbacks of the conventional methods, the present invention was completed as a result of various research and considerations. That is, in the present invention, a plurality of resin layers made of a thermosetting resin and an extender pigment that does not thermally decompose at the temperature at which the thermosetting resin is cured is formed on the entire surface or a part of the surface of a heat-resistant base material, and then thermosetting is performed. In a method of heating at a temperature at which a plastic resin is cured, at least one resin layer has a partially matte surface with different degrees of matte, characterized by a different type or content of extender pigment from other resin layers. This is a method for producing a heat-resistant base material.

The present invention will be explained in more detail below.

In the present invention, a heat-resistant base material refers to glass, ceramics, metal, heat-resistant plastic molded products, etc., but broadly refers to a base material that does not deform when heated to approximately 100°C or higher. .

First, a plurality of resin layers having different matte degrees are formed on the surface of a heat-resistant base material. The resin layer is a layer formed from a mixture of a thermosetting resin and an extender pigment. By making at least one of the plurality of resin layers have a different type or content of extender pigment from the other resin layers, each resin layer has a different degree of matteness, which improves heat resistance. It is possible to decorate the surface of the base material so that the degree of matteness differs locally. In this way, it is possible to express two or more types of matteness. For example, when forming five resin layers, two or more types of matteness may be used, or all five layers may be The degree of matteness may be different.

For example, the following methods can be used to form a plurality of resin layers.

After forming a resin layer on almost the entire surface of the heat-resistant base material using a dipping method or the like to form a certain matte surface, a resin layer with a different degree of matteness than this resin layer is optionally applied on top of the resin layer using a screen printing method or the like. Method of forming by overlapping the parts.

A method in which a plurality of resin inks with different types of extender pigments or extender pigment contents are prepared, and each is printed on arbitrary parts of the surface of a heat-resistant base material using a screen printing method or the like to form a plurality of resin layers.

Prepare multiple resin inks with different extender pigment types or extender pigment contents, and print them on arbitrary parts of the base sheet to create a transfer sheet with multiple resin layers, and use this transfer sheet to print heat-resistant A method of transfer printing multiple resin layers on the surface of a plastic substrate.

Since the degree of matteness of the final matte surface differs depending on the type or content of the extender pigment, the design effect can be enhanced by making these different matte surface parts match the patterns, letters, etc. Can be done. In addition, when forming the resin layer, if a mixture containing a colored pigment is used, a heat-resistant base material having a colored matte surface can be obtained.
In addition to regular pigments, pearl pigments,
Using metallic powder pigments, it is possible to obtain a matte surface with a metallic feel.

Examples of thermosetting resins that can be used include melamine resins, epoxy resins, urethane resins, diallyl phthalate resins, and alkyd resins. As the extender pigment, one that does not thermally decompose at the temperature at which the thermosetting resin is cured can be used, such as calcium carbonate, silica, zinc oxide, magnesium carbonate, and the like.

After forming the resin layer, the heat-resistant base material is heated. Heating is carried out at a temperature at which the thermosetting resin is cured. When a thermosetting resin such as the one described above is used, it can be cured by heating in a temperature range of about 100° C. to 300° C. for about 5 minutes to 60 minutes. By heating, the thermosetting resin component of the resin layer exhibits a volume shrinkage phenomenon as it hardens, and at the same time, the resin component is evened out and hardens with components such as extender pigments appearing on the surface, resulting in a glossy finish. A matte surface is formed, and the degree of matteness differs partially depending on the type or content of the extender pigment.

The heat-resistant base material obtained as described above exhibits a partially matte state with different degrees of matte on its surface. The process is simple, and no masking is required to form designs, letters, etc. on matte surfaces with different degrees of matteness. Furthermore, since it is easy to create a colored matte surface, a base material with a high degree of design can be obtained by making the pattern and the colored part match each other depending on the degree of matteness.
Therefore, various base materials such as glass and alumite obtained by the present invention are expected to be used in a wide range of fields such as interior goods, cosmetic containers, furniture, and automobile parts.

Examples of the present invention will be described below.

Example A resin layer having a patterned portion was formed on a glass plate using the following transfer sheet.

That is, a PET film on which melamine resin has been baked is used as a base, and a floral pattern is printed on it by gravure printing using a mixture (1) consisting of the following composition.
(2) was used to print letters, and an adhesive layer was further provided on top of the letter using an adhesive made of acrylic resin to produce a transfer sheet.

(1) Melamine resin Cymel 303 (manufactured by Mitsui Toatsu)
12 parts Acrylic Almatex 894 (manufactured by Mitsui Toatsu) 30 parts Cellulose acetate butyrate EAB (manufactured by Eastman Kodatsu) 12 parts Extender pigment Silica TK-100 (manufactured by Degusser)
5 parts Solvent methyl ethyl ketone 31 parts (2) Melamine resin Cymel 303 (manufactured by Mitsui Toatsu)
12 parts Acrylic Almatex 894 (manufactured by Mitsui Toatsu) 30 parts Cellulose acetate butyrate EAB (manufactured by Eastman Kodatsu) 12 parts Extender pigment Silica TK-100 (manufactured by Degusser)
15 parts Solvent Methyl ethyl ketone 21 parts After performing transfer printing on a glass plate using the transfer sheet, the glass substrate was heated at 180°C for 20 minutes.

As a result, it was possible to obtain a glass plate in which the floral pattern portion and the character portion had a matte surface, and the character portion exhibited a matte state that was rougher than the floral pattern portion.

Claims (1)

[Scope of Claims] 1. Forming a plurality of resin layers consisting of a thermosetting resin and an extender pigment that does not thermally decompose at the temperature at which the thermosetting resin is cured on the entire surface or part of the surface of a heat-resistant base material, and then In the method of heating at a temperature at which the thermosetting resin is cured, at least one resin layer has a different type or content of an extender pigment from other resin layers, and the matte layer has partially different degrees of matteness. A method for producing a heat-resistant base material having a surface. 2. The method for producing a heat-resistant base material having a partially matte surface with different degrees of matte according to claim 1, wherein the resin layer contains a colored pigment.