JPH04239700A - Method for producing inorganic hardened shaped article - Google Patents

Abstract

PURPOSE:To obtain a decorative plate provided with a desired pattern and embossed design in harmony with each other on a hydrothermally hardened body by a method wherein material slurry is poured into the expanded foaming ink for use on transfer sheet and, after curing, a base sheet and the foamed ink are removed therefrom. CONSTITUTION:A method for producing a decorative plate provided with a desired pattern and embossed design in harmony with each other comprising the steps of printing a base sheet 1 with a foaming ink containing a foaming agent expandable by heating by a desired printing method and pattern, forming thereon a transfer pattern layer consisting of a water-soluble separating layer, a colored pattern layer and a water-soluble adhesive layer, placing the transfer sheet thus obtained in a desired form 6, so that the adhesive layer faces upward, expanding a foaming ink layer by heating to a sufficient temperature to permit expansion of the foaming ink, pouring therein an aqueous slurry consisting mainly of an inorganic material for forming a hardened body by a hydrating and curing reaction or hydrothermal reaction, curing the same, and subsequently removing the base sheet therefrom.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to precast concrete, cast-in-place concrete, ceramic boards (wood chip cement board, calcium silicate board, magnesium carbonate board,
(cement boards reinforced with inorganic and/or organic fibers, etc.), sheets for decorating inorganic boards obtained by hydration curing reactions such as ALC, or hydrothermal reactions, and using this sheet. The present invention relates to a method for producing a decorated hydrothermally synthesized cured body.

0002

BACKGROUND OF THE INVENTION Hitherto, hydrothermal synthetic cured products have generally been molded by the following two methods. ■When forming hydrothermally synthesized hardened materials such as precast concrete, cast-in-place concrete, and ALC, inorganic raw materials are poured into the desired formwork in the form of an aqueous slurry, optionally autoclaved for curing, and then cured by reaction. Remove the mold. ■ Extrusion molding or paper-making method in the form of an aqueous slurry of inorganic raw materials to form a hydrothermal synthetic hardened body consisting of ceramic boards such as wood chip cement boards, calcium silicate boards, magnesium carbonate boards, fiber-reinforced cement boards, etc. After being molded into a certain shape, it is dehydrated and molded into a desired shape using a press such as a roll press or a flat press. After that, it is cured by reaction in an autoclave. etc. The decoration method was as follows. ■A three-dimensional uneven pattern is applied to the surface of the mold, press roll, or press plate, and the pattern is transferred to the surface of the molded product. ■Coloring pigments are mixed into the aqueous slurry raw material to color the resulting molded product. ■Apply coating to the surface of the obtained molded product.

0003

[Problems to be Solved by the Invention] However, the design effect obtained by the above method is very limited and poor, as it is a single color and only has irregularities. Although it is possible to create a beautiful design by combining these methods and spending a lot of time, the current shortage of skilled workers makes it extremely uneconomical and expensive. Put it away. In addition, the versatility of the design is low, and there is a problem that mass productivity and productivity of the same product are lacking. The present invention was made in view of such conventional problems, and when decorating various hydrothermally synthesized inorganic cured bodies,
It is an object of the present invention to provide a method that makes it possible to create decorations that are highly productive, inexpensive, stable, and have excellent design without requiring special equipment or techniques.

0004

[Means for Solving the Problems] In order to solve the above problems, in the present invention, foamed ink is applied on a base sheet in a desired pattern, and a water-soluble release layer is further applied on the base sheet.
A transfer sheet, in which a colored ink layer and a water-soluble adhesive layer are sequentially provided, is placed in advance in a molding frame with the adhesive layer facing upward, and the transfer sheet is heated to foam the foamed ink. The process is characterized by pouring in an aqueous slurry mainly composed of inorganic raw materials that form a cured product through a Japanese curing reaction or a hydrothermal reaction, and removing the base sheet and foamed ink after reaction curing and curing.

The present invention will be specifically explained below with reference to the drawings. FIG. 1 is a sectional view of a transfer sheet used in the present invention.

The base sheet 1 used in the present invention may be any flexible sheet, and may be made of polyolefin such as polyethylene, polypropylene or polystyrene, polycarbonate, polyvinyl chloride, polyamide, polyester, polyacrylonitrile, acrylonitrile-butadiene-styrene copolymer. These include composite plastic sheets, organic and inorganic, synthetic and natural fibrous sheets, etc. The appropriate thickness is 10 to 500μ.

[0007] Foaming ink containing a foaming agent that foams when heated is provided on the base sheet 1 in a desired pattern 2 using a desired printing method. Any known foaming agent, foaming ink, and printing method may be used. A transfer pattern layer is provided on top of this. The transfer pattern layer includes a water-soluble release layer 3, a colored pattern layer 4,
It consists of a water-soluble adhesive layer 5.

As the water-soluble release layer and the water-soluble adhesive layer, hydroxypropylcellulose polyvinyl alcohol, polyvinylpyrrolidone, water-soluble acrylic, hydroxymethylcellulose, etc. are used. The colored pattern layer is usually printed by a method such as gravure printing or screen printing. The binder for the ink is determined by taking into consideration factors such as high elongation when heated and durability of the final product.

The transfer sheet thus obtained is placed in a desired mold with the adhesive layer facing upward, and after installation, the foamed ink is heated at a temperature sufficient to foam the foamed ink. Foam the layers. (Figure 2) Heating methods include heating from above the transfer sheet using a dryer, heating each mold with the transfer sheet placed in an oven, etc. . The appropriate heating temperature is 100 to 140°C. At this time,
Although it is possible to complete the heating and foaming process at the time of manufacturing the sheet, it is most desirable to foam the aqueous slurry immediately before casting the aqueous slurry in consideration of logistics efficiency, transportation costs, stability of the physical properties of the sheet, etc.

[0010] By pouring the raw material aqueous slurry into the slurry, curing and curing, and then peeling off the base sheet, it is possible to obtain a decorative board on which a desired pattern and a desired uneven pattern are harmoniously applied. (Figure 3)

[0011]

[Operation] A transfer sheet consisting of a base sheet, which is coated with foamed ink in a desired pattern, and a water-soluble release layer, a colored ink layer, and a water-soluble adhesive layer are sequentially provided thereon, is placed in a molding mold in advance. The transfer sheet is heated to foam the foamed ink, and then an aqueous slurry mainly composed of inorganic raw materials is poured into the transfer sheet, and after reaction curing and curing, the base sheet and foamed ink are removed. By doing so, the pattern and the emboss are applied, so that an inorganic cured product molded product in which the pattern and the emboss are reliably integrated can be obtained.

0012

EXAMPLE A pattern of vinyl chloride resin to which 5 parts by weight of azo dicarbonamide was added as a foaming agent was coated on the surface of a polyester film having a thickness of 0.1 mm. After applying polyvinyl butyral resin as a release layer on top of it, a sandstone pattern was printed using the gravure printing method using ink with salt-vinyl acetate resin as a binder, and then polyvinyl butyral resin was applied as an adhesive layer and transferred. I created a sheet.

[0013] This transfer sheet was placed in a wooden mold with the adhesive layer facing upward, and heated at 130°C for 30 seconds to foam the foamed ink. In this form, pulp,
A slurry consisting of glass fibers, cement, and water was injected and allowed to harden. After curing is complete, the cement molded product integrated with the transfer sheet is removed from the mold, and finally the polyester film that is the base sheet is peeled off to create the desired sandstone pattern and the desired uneven pattern in harmony. We were able to obtain a decorative cement board.

[0014]

[Effects of the Invention] As described above in detail, by using the present invention, it is possible to obtain a decorative board in which a desired pattern and a desired embossed pattern are harmoniously applied on a hydrothermal synthetic cured product. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of a transfer sheet according to the present invention.

FIG. 2 is a sectional view showing a transfer sheet according to the present invention placed in a mold and heated and foamed.

FIG. 3 is a sectional view showing a state in which a base sheet is peeled off from a decorative board according to the present invention.

[Explanation of symbols]

1 Base sheet 2 Foamed ink layer 3 Water-soluble release layer 4 Colored pattern layer 5 Water-soluble adhesive layer 6 Formwork 7. Aqueous slurry

Claims (2)

[Claims] Claim 1: A transfer sheet is prepared by coating a base sheet with foamed ink in a desired pattern, and then sequentially providing a water-soluble release layer, a colored ink layer, and a water-soluble adhesive layer thereon. Place it in the formwork with the adhesive layer facing up,
The above-mentioned transfer sheet is heated to foam the foamed ink, and an aqueous slurry mainly composed of inorganic raw materials that forms a cured product through a hydration curing reaction is poured into the transfer sheet, and after reaction curing and curing, the base sheet and the foamed ink are removed. A method for producing a characterized inorganic cured product molded product. [Claim 2] A transfer sheet is prepared by coating a base sheet with foamed ink in a desired pattern, and then sequentially providing a water-soluble release layer, a colored ink layer, and a water-soluble adhesive layer thereon. Place it in the formwork with the adhesive layer facing up,
The above-mentioned transfer sheet is heated to foam the foamed ink, and an aqueous slurry mainly composed of an inorganic raw material that forms a cured body through a hydrothermal reaction is poured into the transfer sheet, and after the reaction cures and cures, the base sheet and the foamed ink are removed. A method for producing an inorganic cured product molded article.