JPS5915309B2 - Decorative board manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for producing a polyester decorative board, which is characterized in that after a printed pattern is applied to paper weighing 1009/m2 or less, a urea-melamine resin is applied and impregnated from the printed surface. It is related to.

More specifically, it relates to a method for producing a polyester decorative board characterized by using a urea-melamine resin to maintain adhesion to the polyester and to improve the fluidity of the polyester resin.

The conventional manufacturing method of polyester decorative board weighs 23 to 100
Decorative paper is made by applying a printed pattern to 9/m" paper, and then the decorative paper is bonded to a wood base material such as veneer plywood using a urea-vinyl acetate emulsion type adhesive by applying heat and pressure. It was manufactured by coating the surface of a base material with a resin prepared by mixing an unsaturated polyester resin and a curing agent.

In the case of this conventional method, polyester resin mixed with a hardening agent is poured onto the surface of decorative paper that has been pressed onto a wooden base material such as veneer 5, plywood, etc., the surface is covered with vinylon film, etc., and a rubber roller is used to apply the polyester resin to the decorative paper. When coating the surface uniformly, small air bubbles called pinholes can easily get mixed in.
However, it had the disadvantage that pinholes were formed on the surface. At the same time, when paper with a small basis weight, that is, thin paper, was used, the grooves of the veneer plywood conduits tended to appear as discoloration on the surface of the decorative paper. '5 Also, even if paper with a large basis weight, i.e., thick paper, is used, if the product is subjected to a boiling test with boiling water or a cold heat cycle test, the eyes will fade and these tests cannot be carried out. I failed the exam.

In addition, in the conventional method, the paper is penetrated from the front side by printing ink and polyester resin, and from the back side, an emulsion type adhesive and partially unsaturated polyester resin are sometimes used; Although there was some penetration, the center of the paper remained almost entirely of the original paper quality. As a result, the strength of the film between the paper layers was weak, resulting in performance weaknesses. The present invention was devised in view of these conventional drawbacks, and is intended to eliminate the above-mentioned drawbacks and to enable stable supply in large quantities. The present invention will be explained in detail below.

■0 In the present invention, for example, after printing a desired pattern on paper with a weight of 1009/m or less, a urea-melamine resin paint is applied to an area not exceeding 109/m from the pattern printed surface to impregnate it. , and dried at 70°C to 90°C for 1 to 3 minutes to obtain resin-treated decorative paper.

(5) In order to obtain the resin-treated decorative paper, in addition to the method described above, the urea-melamine resin paint is applied and impregnated from the pattern-printed surface, and at the same time, the resin-treated decorative paper is coated with 5 to 809/M2 from the back surface of the paper.
, preferably by coating and impregnating 5 to 109/M2,
A method of drying at 70° C. to 90° C. for 1 minute to 3 minutes may also be used. At this time, the order in which the resin is applied may be on the printed side first, on the back side first, or at the same time. Note that if the resin is simply applied and impregnated from the back side, a layer of urea-melamine resin cannot be formed on the front side of the paper, so the effect of improving the fluidity of the unsaturated polyester resin cannot be obtained.

Next, the resin-treated decorative paper is attached to a wood base material such as plywood using a synthetic resin adhesive made of a mixture of vinyl acetate resin or vinyl acetate resin modified with acrylic acid ester and ethylene, and urea resin. Heat and pressure mold to integrate.

After that, unsaturated polyester resin mixed with a curing agent such as methyl ethyl ethyl ketone peroxide is applied to the surface of the laminate integrated with plywood etc.
In this method, a polyester decorative board is obtained by applying 2 coats and uniformly rolling the resin on the surface with a rubber roller through a vinylon film. In addition, in the present invention, the reason why paper with a weight of 1009/M2 or less is used is that when paper with a weight of 1009/M2 or more is used, how can the amount of the urea-melamine resin be changed? This is because it does not penetrate to the center of the paper, making it difficult to improve the interpaper strength. Also, when applying urea-melamine resin from the surface of paper, the reason why the amount of adhesion is set to 109/M2 or less is 10
f! This is because when the coating was applied in a ratio of /M2 or more, there was a slight tendency for the adhesion to the polyester resin surface to be inhibited.

As described above, when manufacturing a polyester decorative board, the present invention prints a pattern on paper weighing 1009/M2 or less, coats and impregnates it with urea-melamine resin, and dries it. Because this is a decorative board that is laminated to a wood base material and coated with unsaturated polyester resin, it has a markedly improved inter-paper strength, and at the same time is effective in preventing pinholes and reducing the appearance of grain due to base materials such as veneer and plywood. It has a remarkable effect on preventing.

Therefore, it has become possible to manufacture a high-quality polyester decorative board that eliminates the drawbacks of conventional polyester decorative boards in terms of appearance and performance as well as workability. The present invention will be explained below based on examples.

Example 1 After gravure printing a desired printing pattern using cellulose acetate ink on a titanium white white base paper weighing 809/M2, a solid content of urea-melamine resin of 40 to 40% was applied to the surface of the printed decorative paper. A 60% aqueous solution was coated with 10% by gravure coating method.
~159/M2 was coated and impregnated to obtain resin-coated paper.

The composition of the urea-melamine resin solution is urea, 100 parts of melamine resin, 0.3 parts of penetrant, 0.3 parts of ammonium chloride,
100 parts of water.

After laminating this resin-treated decorative paper on a 2.7♂-thick plywood board using an emulsion type adhesive with a composition of 3 parts vinyl acetate resin, 7 parts urea resin, and 0.7 parts ammonium chloride,
12 After bonding by heating and pressurizing at 130°C and 10KV for 1 to 2 minutes, 1 part of a curing agent (menal ethyl ketone peroxide) was added to the polyester resin containing 0.4% cobalt naphthenate. A polyester decorative board was manufactured by applying 150 to 2009/M2 of polyester resin containing ~2% and using a film method using a vinylon film.

Example 2 After gravure printing a desired printing pattern using cellulose acetate ink on titanium white white base paper with a weight of 1009/M2, a solid content of urea-melamine resin solution of 20% was applied to the surface of the printed decorative paper. % of 2-39/M2
After gravure coating, urea is applied to the back side of the printed decorative paper.
An aqueous solution of a melamine resin solution having a solid content of 40 to 60% was applied by gravure coating at 10-159/M2 to obtain resin-impregnated printed decorative paper.

Claims (1)

[Claims] 1. 10g/m^2 of urea-melamine resin from the pattern-printed surface of paper with a basis weight of 100g/m^2 or less.
1. A method for producing a decorative board, which comprises coating and impregnating the board to an extent not exceeding 100 ml, drying the board, bonding it to a wood base material via an adhesive, and then applying unsaturated polyester resin thereon.