JPH071485A - Manufacture of decorative plate of thermosetting resin and release agent used therefor - Google Patents

Abstract

PURPOSE:To provide a method for manufacturing a thermosetting resin decorative plate in which peeling of decorative plates is facilitated when a pattern sheet impregnated with thermosetting resin at least one core sheet layer are heated and pressurized to simultaneously manufacture a plurality of decoration plates. CONSTITUTION:A method for simultaneously manufacturing a plurality of decorative plates comprises the steps of coating, drying an outer surface of a core sheet 2' to become an outermost layer with release agent 3 containing metallic salt of polymer electrolyte containing lecithin of amphoteric surface active agent as a main ingredient before a core sheet 2 is laminated on a pattern sheet 1.

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 a decorative sheet by heating and pressurizing a pattern paper impregnated with a thermosetting resin and at least one core paper.
The present invention relates to a release agent, and more particularly to a method for producing a decorative plate that facilitates release between the decorative plates when a plurality of decorative plates are simultaneously manufactured, and a release agent used for the same.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a thermosetting resin decorative board, as shown in FIG.
Impregnated paper set (a) consisting of pattern paper 1 and core paper 2
And (b) are stacked in two sets via the release paper 5, and the mirror-finished stainless steel plates 4 and 4 are applied to the outside, and 50 to 100 Kg / cm.
^After applying a pressure of ² and heating to a temperature of 120 to 160 ° C for an appropriate time, cooling to near room temperature, removing the mirror-finished stainless steel plate after decompression, and removing the release paper, a plurality of thermosetting resin decorative plates are obtained. It was common practice to do so.

As the release paper used in this conventional manufacturing method, glassine paper, a thermoplastic resin film or the like is generally used. The method of using release paper such as glassine paper or thermoplastic resin film has a drawback that productivity is poor because a step of inserting and removing the release paper is required before and after heat-press molding. Therefore, as another releasing method, for example, as shown in JP-A-52-146474, a metal salt of a polymer electrolyte (sodium alginate, etc.) is formed on one side of the back surface of the core paper adjacent to the releasing paper of FIG. ) Is used as a main component, and a method of applying a release material and omitting the release paper is adopted. In this case, a method of adding an inorganic powder is used for the purpose of sealing.

However, in the method of applying a release agent containing a metal salt of a polymer electrolyte as a main component and an inorganic powder, the releasability is inferior to that when a release paper is used. This is because the surface of the kraft paper, which is the core paper, is rough, so even if the release agent containing the metal salt of the polymer electrolyte as the main component and the inorganic powder is applied is applied to the bottom layer of the adjacent decorative board. This is because the fibers of the core-paper kraft paper are entangled with each other, which makes it difficult to release the adjacent decorative board.

[0005]

DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted various studies in order to improve the above-mentioned drawbacks, and as a result, found that a releasing agent containing a metal salt of a polymer electrolyte containing lecithin, which is an amphoteric surfactant, as a main component was The present invention has been completed by the present invention, and found that the release property was far superior to that of a conventional release agent obtained by adding an inorganic powder to a metal salt of a polymer electrolyte (such as sodium alginate). The purpose of is to improve the mold releasability of the conventional mold release agent, thereby improving the productivity and reducing the manufacturing cost when obtaining a plurality of thermosetting resin decorative boards. Further, another object of the present invention is to provide a release agent having improved releasability as compared with conventional ones when obtaining a plurality of thermosetting resin decorative boards.

[0006]

DISCLOSURE OF THE INVENTION The gist of the present invention is to provide a pattern paper impregnated with a thermosetting resin to form a decorative surface layer, and a thermosetting resin laminated on the back side of the pattern paper. In a method for simultaneously producing a plurality of decorative boards by simultaneously heating and press-molding a plurality of impregnated paper sets that are impregnated with resin to form a core layer and at least one core-paper, The outermost layer of the paper set, which is the outermost layer of the paper set, is coated with a release agent containing a metal salt of a polyelectrolyte containing lecithin, which is an amphoteric surfactant, as a main component and dried on the outer surface of the paper. Of producing a flexible resin decorative board,
And a pattern paper impregnated with a thermosetting resin to form a decorative surface layer, and at least one core laminated on the back side of the pattern paper and impregnated with a thermosetting resin to form a core layer − Simultaneously heat multiple sets of impregnated paper set consisting of paper and
A mold release agent used in a method of simultaneously producing a plurality of decorative boards by pressure molding, in which lecithin, which is an amphoteric surfactant, was added to a release agent containing a metal salt of a polymer electrolyte as a main component. It is a release agent characterized by that.

That is, according to the present invention, in the production of a thermosetting resin decorative plate, when a plurality of decorative plates are simultaneously heat-pressed, the core, which is the outermost layer of each impregnated paper set, is used. By applying and drying a release agent whose main component is a metal salt of a polymer electrolyte containing lecithin, which is an amphoteric surfactant, on the outer surface side of the paper, the release paper of FIG. 2 showing the conventional technique is completely unnecessary. Therefore, since the steps of inserting and removing the release paper are eliminated, it is possible to improve the productivity of the thermosetting resin decorative plate and reduce the manufacturing cost of this type of decorative plate. Further, since the release paper according to the present invention contains lecithin, which is an amphoteric surfactant, in the release paper, the leveling property is improved, and the entanglement of the fibers of the core-paper which is the outermost layer to be released from each other can be prevented. As a result, even if the fibers are linearly exposed on the outer surface of the core-paper to be released from each other, the entanglement of the fibers is prevented by applying and releasing the release agent on the fibers. In addition, even if there is entanglement, the entanglement can be easily released by the releasing action of lecithin, which is an amphoteric surfactant, when the both decorative plates are peeled off.

The present invention will be described in detail. The thermosetting resin decorative board in the present invention is not different from the conventional one, and a decorative surface layer made of pattern paper impregnated with melamine resin, diallyl phthalate resin or polyester resin, and melamine and phenol resin. Or a core of a kraft paper impregnated with a polyester resin and a core material layer of the paper.
In the present invention, when a plurality of such decorative plates are simultaneously heated and pressed, the lowermost core of each adjacent decorative plate-a polyelectrolyte containing lecithin, which is an amphoteric surfactant, on one side of the back surface of the paper. Applying a release agent whose main ingredient is the metal salt of
By using the dried core-paper, the adjacent decorative plate after molding can be released from the back surface of the core-paper.

In the present invention, the conditions for manufacturing the above decorative plate are the same as the conventional conditions and are approximately 12
It is a heating condition of 0 to 160 ° C. and a pressurizing condition of ^{20 to} 100 Kg / cm ² , and usually a multistage press is used. Examples of the metal salt of the polyelectrolyte used in the present invention include sodium alginate, sodium cellulose glycolate-ether, fibrin sodium glycolate, sodium starch glycolate, and the like in an aqueous solution of an amphoteric surfactant. And
1 to 30 parts by weight of lecithin is added to 1 part of the metal salt of these polymer electrolytes. If necessary, about 5 to 50 parts of inorganic powder mica or the like may be added to the obtained release agent as a sealing material. In the present invention, the solution mixed with the above-mentioned release agent is applied to one surface of the core-paper and dried, and the core-paper coated with the release agent is laminated so that the applied surface is the outermost layer, After the heat and pressure molding, the adjacent decorative plates are separated from each other on their coated surfaces.

The present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of the present invention. In FIG. 1, a pattern paper 1 is placed on one surface of a core material layer made of core paper, and the other surface of the core material layer is impregnated with the release agent according to the present invention. And the impregnated paper is combined to form a set. A set of such impregnated papers is laminated so that the core paper impregnated with the release agent overlaps each other, and the pattern papers 1 on both sides are sandwiched by mirrored stainless steel plates and placed in a multi-stage press to heat and pressurize the decorative plate. To manufacture.

[0011]

EXAMPLES Next, the present invention will be specifically described with reference to examples. Example 1 30 g of sodium alginate and 30 g of mica having an average particle size of 100 μ are mixed. This powder is mixed with 30 g of isopropyl alcohol and further with 10 g of lecithin to obtain a clay-like release agent. This release agent is dissolved in 2 kg of water to prepare a release agent solution. As a core material layer, a core paper is prepared by impregnating 200 g / m ² of kraft paper with 50% of phenol resin, and 30 g of the release agent solution is applied to the back surface of the core paper.
/ M ^{2 at} a rate of 120 ° C.
Dry for 1 minute to form a release coating. As the decorative surface layer, a pattern paper having 120 g / m ² of pattern paper impregnated with melamine resin was prepared, and two sets of these were placed so that the release agent application surfaces of the core paper were in contact with each other as shown in FIG. combination,
Apply the stainless steel plates to the top and bottom, apply a pressure of 80 kg / cm ² and heat at 150 ° C for 60 minutes, then cool to room temperature, decompress and remove the mirror stainless plates to easily set the impregnated paper set in Fig. 1. Two melamine decorative boards consisting of (a) and (b) were completed, and these could be easily released from the mold. In this embodiment, as shown in FIG.
A total of four core papers and one pattern paper are adopted to complete one decorative plate.

[0012]

As described above, in the present invention, in the method for simultaneously producing a plurality of decorative boards, a polymer containing lecithin, which is an amphoteric surfactant, is provided on the outer surface side of the core-paper which is the outermost layer. By using a core paper that has been coated and dried with a release agent whose main ingredient is a metal salt of an electrolyte, it is possible to easily and reliably release the molded thermosetting resin decorative board, which improves productivity. Therefore, the manufacturing cost of the decorative board after molding can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing a manufacturing method of the present invention.

FIG. 2 is a cross-sectional view schematically showing a conventional manufacturing method.

[Explanation of symbols]

 1 Pattern Paper 2 Core-Paper 2'Outermost Layer Core-Paper 3 Release Agent 4 Mirror Surface Stainless Steel Plate 5 Release Paper

Claims (2)

[Claims] 1. A pattern paper which is impregnated with a thermosetting resin to form a decorative surface layer, and at least a layer laminated on the back side of the pattern paper and impregnated with a thermosetting resin to form a core material layer. In a method for simultaneously manufacturing a plurality of decorative sheets by simultaneously heat-press molding a plurality of sets of impregnated paper sets with a single layer of core-paper, laminating the core-paper on the pattern paper. Before the heat treatment, the outermost layer of the core-paper is coated with a release agent containing a metal salt of a polyelectrolyte containing lecithin, which is an amphoteric surfactant, as a main component, and dried. Curable resin decorative board manufacturing method. 2. A pattern paper which is impregnated with a thermosetting resin to form a decorative surface layer, and at least a laminate laminated on the back side of the pattern paper and impregnated with a thermosetting resin to form a core material layer. One layer of core-a release agent used when simultaneously manufacturing a plurality of decorative plates by simultaneously heating and pressing a plurality of sets of paper and a metal salt of a polymer electrolyte as a main agent. A release agent characterized by adding lecithin, which is an amphoteric surfactant, to the prepared product.