JPH01299676A - Production of decorative sheet - Google Patents

Abstract

PURPOSE:To easily form a decorative sheet by using foaming ink to obtain printing paper, applying a synthetic resin sol, and providing a thermosetting resin layer. CONSTITUTION:Foaming ink is applied on printing paper 1 by gravure printing, etc. The drying temp. is controlled to a temp. (<=120 deg.C) at which the foaming ink 3 is dried, to prevent a foaming. The foaming ink 3 is obtained by using PVC, acrylic resin, an ethylene-vinyl acetate copolymer, etc., as the vehicle of the foaming ink 3, incorporating about 2-10% foaming agent, and further mixing a pigment and a dye as the colorant and an org. solvent into the ink. A transparent synthetic resin sol is then applied over the whole surface of the printing paper, dried, and gelled. The foaming ink is simultaneously formed, and the surface corresponding to the patterned part printed by the foaming ink is matted as compared with the other surface.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a surface decorative sheet for building materials such as furniture, wall materials, ceiling materials, etc.

[Conventional technology] Conventionally, surface decorative sheets for building materials such as furniture, wall materials, ceiling materials, etc. have been produced by ■ printing on paper base paper and then coating it with amino alkyd resin or polyurethane resin paint; ■ calendaring. Printing is performed on a sheet of polyvinyl chloride, etc. obtained by a polyvinyl chloride method or melt extrusion method, or a transparent sheet is heat-sealed on top of the printing, or ■ Printing is performed on paper base paper. After that, transparent sheets such as polyvinyl chloride are laminated using adhesive.

[Problem to be solved by the invention]

However, the conventional decorative sheet manufacturing method described above produces a decorative sheet that has excellent abrasion resistance and ease of post-processing such as wrapping, and has a high design value, as well as solvent resistance and
It is difficult to obtain a decorative sheet with excellent tape resistance, and a method for easily obtaining the above decorative sheet has been desired.

[Means to solve the problem]

The present invention has been made to solve the above problems, and the present invention comprises: (1) a step of obtaining a printing paper using foamed ink on any part of the pattern of a base sheet; The process of coating the entire surface of printing paper with a transparent synthetic resin sol,
■ At the same time as the synthetic resin sol is gelatinized, the foamed ink is foamed to obtain a decorative sheet whose surface corresponding to the pattern printed with the foamed ink is more matte than the rest of the surface. This is a method for producing a decorative sheet having a difference in gloss on the surface, comprising the step of further providing a transparent thermosetting resin layer on the surface.

The present invention will be specifically explained below.

In step (1) of the present invention, the base paper for the base sheet is thin paper with a basis weight of 23 to 65 g/rrt, or paper mixed with water-soluble acrylic, polyamide, etc. and having a basis weight of 23 to 65 g/rd.
O paper reinforced paper, 30-40% impregnated or coated with water-soluble acrylic acid ester, melamine resin, etc. Tsubo N50-1
In addition to paper base papers such as resin-impregnated paper or resin-coated paper with a weight of about 50 g/rrf, titanium paper with a basis weight of about 35 to 150 g/nf, heat-resistant plastic films such as polyester films and polyamide films can also be used as base paper. However, in consideration of adhesion with the transparent resin layer, paper base paper is preferable.

On the above-mentioned base paper, printing such as a title pattern, an inkstone pattern, an abstract pattern, a monochrome full-surface coat, etc. is applied using a conventional printing method such as gravure printing or offset printing. Gravure printing is preferred from the viewpoint of printing durability, and the ink is a vehicle of ordinary resins such as nitrified cotton, cellulose acetate, vinyl chloride, acrylic resin, butyral, etc. alone or in the form of a mixture or copolymer.
As a coloring agent, a mixture of pigments, dyes, general organic solvents, etc. is used.

Foam ink is applied onto the printing paper using a normal printing method such as gravure printing. At this time, the drying temperature is kept to a level that dries the foamed ink (usually 120°C or less) to prevent foaming. The foamed ink uses a resin such as vinyl chloride, acrylic resin, or ethylene-vinyl acetate copolymer as a vehicle, contains about 2 to 10% of a foaming agent, and contains pigments, dyes, organic solvents, etc. as a coloring agent. Use the kneaded one. As the foaming agent, it is preferable to use a relatively low foaming type foaming agent with a foaming ratio of about 2 to 5 times.

Next, in step (2), a transparent synthetic resin sol is applied to the entire surface of the printing paper coated with the foamed ink as described above, and the synthetic resin may include polyvinyl chloride resin, acrylic resin, , polyurethane resins, etc. Among them, polyvinyl chloride is preferably used in terms of suitability for lamination and suitability for bending. If necessary, the polyvinyl chloride sol is mixed with a plasticizer and the like, and this is coated by an appropriate means to form a resin layer. The polyvinyl chloride sol used for this purpose can be made into a fluid with a relatively low viscosity at room temperature when the degree of polymerization is within the range of about 500 to 1000, and can be easily coated onto printing paper.

Next, in step (2), after coating a synthetic resin sol such as polyvinyl chloride sol as described above, the sol is dried and gelled by heat, and at the same time, foamed ink is foamed, and the pattern area printed with the foamed ink is The surface corresponding to the area is made more matte than the rest of the surface. At this time, a sufficient temperature (usually 150°C or higher) is required, so a general coater can be used as the coating machine, but the machine must have a drying zone with a sufficient drying temperature. be.

In this way, a decorative sheet with a difference in gloss is obtained.

In addition, in the present invention, in order to protect the transparent resin layer of the decorative sheet obtained as described above and to adjust gloss, a transparent thermosetting resin layer, such as polyurethane resin, amino A decorative sheet can be obtained by providing a layer of resin such as resin. In this case as well, coating can be carried out in the same manner as for coating the transparent resin layer described above.

Next, the present invention will be explained with reference to the drawings. Fig. 1 is a cross-sectional view showing the process of obtaining printing paper in the present invention.
is printing base paper, and 2 is printing ink. FIG. 2 is a cross-sectional view showing the process of applying foamed ink to a portion of printing paper in the present invention, in which 1 is printing base paper, 2 is printing ink, and 3 is foamed ink. FIG. 3 is a sectional view showing the process of coating polyvinyl chloride sol on printing paper coated with foamed ink in the present invention, in which 1 is printing base paper, 2 is printing ink, 3 is foamed ink, and 4 is polyvinyl chloride sol. It is vinyl chloride sol.

FIG. 4 is a cross-sectional view showing the process of gelling the polyvinyl chloride sol, foaming the foamed ink at the same time, and coating the thermosetting resin in the present invention, where l is the base paper for printing, 2
5 is a printing ink, 5 is a foamed ink, 6 is a polyvinyl chloride layer, and 7 is a thermosetting resin layer.

〔Effect of the invention〕

According to the present invention, since it has a synthetic resin layer such as polyvinyl chloride on the surface layer, it has excellent abrasion resistance and suitability for post-processing such as wrapping, and the foamed ink area becomes matte due to the foaming of the foamed ink. A so-called gloss matte effect can be obtained, and a decorative sheet can be easily obtained which can be synchronized with the pattern and has a high design quality. Furthermore, when a thermosetting resin layer is provided on the surface of this decorative sheet, a decorative sheet with excellent solvent resistance and tape resistance can be easily and efficiently manufactured.

〔Example〕

Normal wood grain printing was applied to 30 g of paper spacing reinforced paper (manufactured by Sanko Seigi) using a nitrified cotton yarn ink MA (manufactured by Moroboshi Ink) using a rotogravure rotary printing machine to obtain printed paper. Foaming ink for the conduit part (manufactured by Dainichiseika, Hisol GLM)
was used.

Next, using a gravure coater with a plate depth of 135 μm, a polyvinyl chloride resin [manufactured by Dainichiseika, Hisol J-270, 2] was applied.
71] was applied. Then, this sol was gelatinized in a drying oven at 200° C., and at the same time the foamed ink was foamed to obtain a decorative sheet in which the foamed ink area became matte and had a matching effect with the pattern. Next, a urethane resin (manufactured by Dainichiseika) was applied to the surface of the decorative sheet as a surface protective layer.
PTCZ-1) was applied using a gravure coater with a plate depth of 20 μm to obtain coated paper.

The decorative sheet obtained in this way is highly flexible and has excellent suitability for post-processing such as wrapping, and also has a matte design in the conduit section, which is far superior to so-called natural wood. It was a sheet.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the process of obtaining printing paper in the present invention, Fig. 2 is a cross-sectional view showing the process of applying foamed ink to a part of the printing paper in the present invention, and Fig. 3 is a cross-sectional view showing the process of applying foamed ink to a part of the printing paper in the present invention. Fig. 4 is a cross-sectional view showing the process of coating polyvinyl chloride sol on printed paper, in which polychlorination and nil sol are gelled, foamed ink is foamed at the same time, and a thermosetting resin is further coated. A sectional view showing the process, FIG. 5 is an enlarged view of the part circled in FIG. 4. l... Printing base paper, 2... Printing ink, 3... Foamed ink, 4... Polyvinyl chloride sol, 5... Foamed foamed ink, 6... Polyvinyl chloride layer, 7.・・・
Thermosetting resin layer.

Claims (1)

[Claims] 1. (1) Applying foamed ink to any part of the pattern on printing paper; (2) Coating a transparent synthetic resin sol over the entire surface of the printing paper coated with foamed ink. (3) gelling the synthetic resin sol and foaming the foamed ink at the same time to obtain a decorative sheet in which the surface corresponding to the pattern portion printed with the foamed ink is more matte than the other surface portions; 1. A method for producing a decorative sheet having a surface with a difference in gloss. 2. The method for producing a decorative sheet according to claim 1, wherein the synthetic resin is polyvinyl chloride. 3. The method for producing a decorative sheet according to claim 1 or 2, further comprising providing a transparent thermosetting resin layer on the surface of the decorative sheet.