JPH0789005A - Production of inorganic decorative panel - Google Patents

Abstract

PURPOSE:To efficiently provide patterns well-matched with embossed patterns and having high design effect to the base material of an inorg. decorative panel having embossed patterns applied to the surface thereof. CONSTITUTION:A trasfer sheet 7 is placed on the surface of the base material 6 of an inorg. decorative panel having an embossed shape provided to the surface thereof and an elastic or plastic member 8 of which the surface coming into contact with the transfer sheet 7 is heated is placed on the transfer sheet 7 and the transfer sheet 7 is bonded to the base material 6 under heating and pressure by a roll 5 through the elastic or plastic member 8 to apply patterning to the base material 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an inorganic decorative board by efficiently providing a highly decorative design on an inorganic decorative board substrate having an embossed shape which is used as an exterior material or the like.

[0002]

2. Description of the Related Art Conventionally, various types of inorganic decorative boards have been used for the exterior of houses, but in recent years, products having embossed surfaces have been favored along with the tendency toward higher quality and higher design. In the case of a conventional product with a flat surface, as a method of providing a pattern on the surface, for example, a method of laminating a sheet on which a pattern is printed can be used. I had no choice but to resort to simple decoration methods such as painting or sprinkling sand-shaped objects.

When transferring using a rubber roll or the like,
A rubber roll having a soft surface is used to follow the embossing, but the surface is scratched during repeated transfer, and there is a problem in durability.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention, in particular, to provide an inorganic decorative board substrate whose surface is embossed. On the other hand, it is an object of the present invention to provide a method for manufacturing an inorganic decorative board, in which a highly-designed design in harmony with embossing is efficiently provided.

[0005]

In order to solve this problem, the present invention places a transfer sheet on the surface of an inorganic decorative board base material having an embossed surface, and heats the surface in contact with the transfer sheet. There is provided a method for producing an inorganic decorative board, which comprises placing the elastic body or the plastic body on which the material is applied, and thermocompression-bonding a transfer sheet with a roll through the elastic body or the plastic body for painting.

In the manufacturing method of the present invention, since the transfer sheet is thermocompression bonded to the emboss of the substrate by utilizing the deformation of the elastic body or the plastic body, the roll used in the thermocompression bonding according to the present invention is There is no need to wrap elastic material such as rubber on the surface,
It is possible to select a durable material such as metal.

FIG. 1 shows an example of a cross-sectional structure of a transfer sheet used in the present invention. The transfer base film has a structure in which a release varnish layer, a pattern layer, and an adhesive layer are sequentially provided on the surface.

As the transfer base film, a thermoplastic resin film capable of following the surface embossed shape of the inorganic base material by the heat of thermocompression bonding at the time of transfer by an elastic body or a plastic body is used. Specific examples include vinyl chloride, polyethylene, polypropylene, nylon, polyester and the like.

The type and thickness of the resin of the transfer substrate film may be selected depending on the degree of embossing of the surface of the inorganic decorative board substrate and the transfer temperature, but according to the experiments conducted by the present inventors, 150 At a transfer temperature of ℃ to 180 ℃, thickness 1
The best results have been obtained with a vinyl chloride resin film having a thickness of 00 μm or less.

The release layer may be properly selected depending on the type of the base film, but when vinyl chloride is used for the base sheet, polyvinyl butyral gives good results.

The pattern layer is usually printed by a method such as gravure printing or screen printing. The binder of the ink is determined in consideration of the large elongation when heated and the durability of the final product.

As the adhesive layer, polyvinyl alcohol,
Acrylic, hydroxymethyl cellulose, polyester, polyamide and the like are used. Further, when assuming the step of applying the adhesive agent on the base material in advance, the adhesive agent is not always necessary.

FIG. 2 schematically shows the steps of the manufacturing method of the present invention. Place the transfer sheet 7 on the inorganic decorative board substrate 6,
Elastic or plastic body 8 whose surface in contact with the transfer sheet is heated
A roll 5 is used for thermocompression bonding to transfer the pattern. After the thermocompression bonding, the transfer sheet is peeled off to obtain a decorative plate with an extremely high design in which the embossing and the pattern are harmonized.

Asbestos cement as the inorganic decorative board substrate,
A calcium silicate board, a magnesium silicate board, a wood chip cement board, etc. can be used.

Silicon is mainly used as the elastic body, but neoprene, SBR, and the like can also be used, and a plastic body can also be used.

Further, clear coating can be applied from the above for surface protection.

[0017]

As described above, in the present invention, by using an elastic body or a plastic body whose surface in contact with the transfer sheet is heated in thermocompression bonding, the transfer following the embossed shape of the inorganic decorative board base material is performed. It is possible to add a beautiful design that matches the embossed pattern. Since the elastic body or the plastic body follows the embossing and the heating, the roll does not need to be wound with an elastic body, and a durable roll such as an iron roll can be used.

[0018]

Example A polyvinyl butyral resin was applied as a release layer on the surface of a semi-rigid vinyl chloride sheet having a thickness of 75 μm, and then an inorganic base material embossed by an gravure printing method using an ink having a vinyl chloride vinyl acetate resin as a binder. A pattern conforming to the shape was printed, and a polyester resin was applied as an adhesive layer to prepare a transfer sheet.

As a base material for the inorganic decorative board, a calcium silicate board having a brick-like embossed surface is prepared.
Dust was removed and treated with a sealer. The transfer sheet was placed on this sheet so as to be in synchronization with the embossed shape, and a calcium silicate plate on which the surface in contact with the transfer sheet was heated to 120 ° C. was placed with silicon of about the same size and a thickness of 10 mm, and the metal roll was rolled. Was used for thermocompression bonding. After peeling off the transfer substrate sheet,
An acrylic urethane top coat was applied to the surface as a surface protective layer.

The decorative decorative plate thus obtained had a very high designability, following a fine embossed shape and having a synchronized pattern.

[0021]

As described above, according to the present invention, it is possible to impart a beautiful pattern in synchronization with the embossed pattern to the surface of the inorganic decorative board having the embossed shape.
Also, a durable roll can be used as the pressure roll, and scratches on the roll are not affected in the manufacturing process, and good transfer can be performed. Further, when the elastic body or the plastic body is damaged in continuous use, it is not necessary to rewind the elastic body like a rubber roll, and can be replaced relatively quickly during the work.
Time can be shortened.

[0022]

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of the configuration of a transfer sheet used in the present invention.

FIG. 2 is a schematic view showing an example of a manufacturing process of the present invention.

[Explanation of symbols]

1 ... Transfer base film 2 ... Release layer 3 ... Design layer 4 ...
Adhesive layer 5 ... Roll 6 ... Inorganic decorative board substrate 7 ... Transfer sheet
8 ... Elastic body or plastic body

Claims (1)

[Claims] 1. A transfer sheet is placed on the surface of an inorganic decorative board substrate having an embossed shape on the surface, and an elastic body or a plastic body whose surface in contact with the transfer sheet is heated is placed thereon.
A method for producing an inorganic decorative board, characterized in that a transfer sheet is thermocompression-bonded by means of a roll through this and is painted.