JPS60247590A - Formation of picture pattern having fine embossed pattern - Google Patents

Abstract

PURPOSE:To inexpensively prepare a facing paper, by a method wherein the fine embossed pattern and smooth surface of a matrix are transferred on a cured resin and a character, a mark or a color is printed to a base film from the back surface thereof in matching relation to the transferred pattern by screen printing. CONSTITUTION:Releasing treatment is applied to the surface of a matrix 1 having fine embossed patterns 11A and partial smooth surfaces 12A on the surface thereof and a photosensitive resin 2A is applied to the treated surface of said matrix 1 while a base film 3 is laminated to the resin which is, in turn, exposed through said film 3 to be cured before the matrix 1 is released. After the fine embossed patterns 11A and the smooth surfaces 12A of the matrix 1 are transferred to the cured resin 2B as mentioned above, a character, a mark or a color is printed on said base film 3 from the back surface thereof in matching relation to the transferred patterns by screen printing. By this method, a facing paper provided with a picture pattern, which has the fine embossed patterns and the smooth surfaces corresponding to the matrix in combination, and having printing 4 on the back surface thereof can be formed.

Description

[Detailed description of the invention]

OBJECT OF THE INVENTION [Field of Application of the Invention 1] The present invention relates to a method of forming a pattern having fine irregularities and smooth parts. The method of the invention is particularly suitable for the production of face sheets for small electronic desktop calculators and key power devices and control devices for household appliances. [Prior Art] As devices such as those described above have become smaller, the designs on their face sheets have become more detailed.
Traditionally, when a smooth surface alone lacks a sense of design,
Face sheets that have been subjected to hairline processing or matte processing to form fine irregularities have been used, but with a single pattern, the design of the face sheet is monotonous and is still unsatisfactory. From a functional point of view, as the pattern becomes finer, there will be problems such as more touch errors if the pattern is the same on the entire surface, and it becomes difficult to distinguish the keys visually. Accordingly, it has been desired to provide a face sheet with a design having a combination of fine irregularities and smooth parts at a low cost.

[Problems to be solved by the invention] The present invention meets the above-mentioned demands and provides a method for inexpensively producing a face sheet having fine irregularities and smooth parts so as to have a rich design, reduce touch errors, and make it easy to distinguish keys. Composition of the invention [Means to solve the problem]

As shown in FIG. 1, the method for forming a pattern having a fine uneven pattern according to the present invention involves releasing the surface of a matrix 1 having a fine uneven pattern 11A and a partially smooth surface 12A on the surface. After coating the photosensitive resin 2A with a base film 3 and exposing it to light to cure the resin 2A, the mother mold 1 is peeled off, and the fine uneven pattern and smooth surface of the mother mold 1 are coated with the hardened resin 2B. It is characterized in that characters, symbols, colors, etc. are screen printed on the back surface of the base film 3 in accordance with the transferred pattern.

[Effect]

In this way, a face sheet 1 with a pattern as shown in FIG.
0 is possible.

【Example】

A typical method for manufacturing the master mold 1 includes laminating a photosensitive film on a base material having a fine uneven pattern such as hairline or matte finish, and exposing and developing a desired pattern on the base material to create a partial pattern. There is a method to form a smooth surface. As base materials, aluminum, iron, etc., which are already on the market and have surface treatments such as hairline or matte finishing, can be used.
A metal plate material such as stainless steel or copper or a glass plate material may be used. Instead of laminating photosensitive films, the mother mold 1 can also be produced by applying a photosensitive resin and curing it by exposing it to light. Alternatively, a method of forming a partially smooth surface by placing a resist on a base material having a uniform fine uneven pattern and honing it can also be adopted. If desired, it is also possible to use a combination of base materials having different types of fine uneven patterns, such as hairline and matte patterns, to form a pattern having these together with a smooth surface. In this case, it is recommended to use photosensitive resin to replicate the master mold. Effects of the Invention According to the method of the present invention, a face sheet having a pattern including one or more fine uneven patterns and a smooth surface in addition to printing can be mass-produced at a low cost. Therefore, it not only makes the faces of small key-powered devices and control devices rich in design, but also helps improve their functionality.
Product value can be increased.

[Brief explanation of drawings]

FIGS. 1 and 2 are cross-sectional views showing the process of forming a pattern having a fine uneven pattern according to the present invention. 1...Matrix 2...Photosensitive resin 3...Base film 4...Printed layer Patent applicant Dainippon Printing Co., Ltd. Agent Patent attorney Souo Suga Figure 1 and Figure 2 I l=j Illgo

Claims (1)

[Scope of Claims] (1) The surface of a matrix having a fine uneven pattern and a partially smooth surface is subjected to mold release treatment, a photosensitive resin is applied, a base film is laminated and exposed, After the resin is cured, the fine uneven pattern and smooth surface of the matrix are transferred to the cured resin by peeling off the matrix, and letters, symbols,
Method of forming a pattern with a fine uneven pattern characterized by screen printing of colors etc. (2) The ffl type is
Base material with minute irregularities such as hairline and matte finish
: Expose and develop a desired pattern on a photosensitive film, and then laminate or apply a photosensitive resin to form a partially smooth surface.
＋ ４＋ 士、n）η−k z Corporate bond 拮 d÷ n
\Method in the first range. (3) The method according to claim 1, wherein the matrix is produced by combining a base material with fine irregularities such as hairline or matte finish and a base material with a smooth surface.