JPS61123578A - Production of decorative board - Google Patents

Abstract

PURPOSE:To obtain a decorative board having favorable adhesion to a pattern layer and excellent durability, by a method wherein a releasing sheet is coated with a thermosetting resin, a glass sheet treated with a silane coupling agent and provided with a pattern layer is laminated thereon to produce a transfer sheet, and the transfer sheet is heated under pressure. CONSTITUTION:A thermosetting resin 4 containing a glass powder 7 is applied to the surface of the releasing sheet 1, then the glass sheet 2 treated with a silane coupling agent and provided with the pattern layer 3 on one side thereof is laid thereon with the pattern layer 3 directed upward, and the same resin 4 as the former resin 4 is applied to the surface of the layer 3 to produce the transfer sheet 5. The transfer sheet 5 is place on a substrate 6 with the releasing sheet 1 on the upper side, and is heated under pressure to harden the resin 4, followed by removing the sheet 1 to obtain the objective decorative board.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing decorative laminates, and in particular,
The present invention relates to a method for simultaneously transferring a surface protective layer having good adhesion to a pattern layer and having high durability and a pattern layer.

(Prior Art) Many methods have been proposed for manufacturing decorative boards by simultaneously transferring a pattern layer and a surface protection III, but most of them use thermoplastic resin as a surface protection layer. The disadvantage is that the surface properties after transfer are weak.

In addition, some products use thermosetting resin, but in many cases the thermosetting resin is already completely cured in the transfer sheet state, and the pattern layer and surface retaining layer are in close contact with each other. It had the disadvantage of poor performance.

(Problems to be Solved by the Invention) The present invention improves the drawbacks of the prior art as described above, and provides a decorative board characterized in that a pattern layer and a highly durable surface protective layer are formed by a transfer method. The present invention provides a method for manufacturing.

(Means for Solving the Problems) The method of the present invention is characterized by using a glass sheet that becomes transparent when impregnated with resin, and improves the adhesion between the glass sheet and the impregnated resin. In order to achieve this, the glass sheet is treated with a silane coupling agent, and the inside of the glass sheet is filled with glass powder to increase its strength.

That is, in the method of the present invention, as shown in FIG. 2, a thermosetting resin (4) mixed with glass powder (7) is coated on the surface of a release sheet (1), and a pattern layer (3) A transfer sheet (5) obtained by stacking the glass sheets (2) with the pattern layer facing up, and then applying the same thermosetting resin (4) as the thermosetting resin on top of the glass sheets (2), As shown in the figure, the mold release sheet is stacked on the substrate (6) with the mold release sheet)-<1) facing up, heated and pressed to harden the thermosetting resin, and then the mold release sheet is removed. is the obtained decorative board.

Conventional release sheets include those that have template properties themselves, such as a polyester resin film, those coated with a release resin such as polypropylene resin on the surface of paper, or those that are laminated with resin films. It is selected from among the more well-known ones depending on the application and taking into consideration heat resistance and the like.

As the glass sheet, one mainly composed of glass fibers, such as glass cloth or glass nonwoven fabric, is used, and in particular, one that does not contain impurities is used so that opaque areas are not formed after resin impregnation.

As the silane coupling agent, aminosilane, epoxysilane, vinylsilane, and others can be used, and they are used in the form of an aqueous or alcoholic solution.

Any pattern layer may be formed by printing directly on the glass sheet or by a transfer method. In particular, in order to fix the glass sheet on the surface of the release sheet, a thermosetting resin of 90% is applied. If you stack the glass sheets and let them dry, the structure will be like a glass sheet lined with a release sheet, so even if you print directly, there will be no misregistration due to deformation of the glass sheets, and you can form fine patterns. It is possible.

As the thermosetting resin to be impregnated, one with excellent transparency is selected from among known resins such as epoxy resins, unsaturated polyester resins, diallyl phthalate resins, and unsaturated vinyl ester resins. do.

The amount of glass powder to be added needs to be changed slightly depending on the density of the glass sheet used, but it is usually within the range of 5 to 20 parts by weight based on the weight of the resin. Note that the glass powder only needs to be mixed in the thermosetting resin that is impregnated into the glass sheet, and does not need to be mixed in the thermosetting resin that is impregnated into the pattern layer. Of course it doesn't matter.

Note that if the glass powder is treated with a silane coupling agent, the adhesion of the impregnating resin, etc. will be further improved.

(Function) Since the pattern layer is directly formed on the glass sheet, it is not concerned with the drying state of the thermosetting resin. Therefore, the impregnated thermosetting resin only needs to be dried to the extent that the transfer sheet does not block. , After transfer, it is firmly attached to the glass sheet and the transferred object! can be worn.

Moreover, the glass powder is also filled into the weave of the glass cloth and the voids of the glass nonwoven fabric, thereby increasing the strength of the surface protective layer.

(Effects of the invention) - A pattern layer and a surface protective layer can be formed at the same time by one transfer, and the surface protective layer becomes a strong layer, making it possible to manufacture a highly durable decorative board.

■The surface protective layer is mainly made of glass sheet, and has excellent physical performance as well as chemical performance.

■Since the glass sheet is treated with a silane coupling agent, it has good adhesion to the impregnated thermosetting resin.

(Example) 59/1I18 of transparent unsaturated polyester resin mixed with glass powder was applied on top of a 20μ thick polypropylene film pasted on the surface of high quality paper of 150a/a+ tsubo ff. After layering a glass nonwoven fabric with a basis weight of 40 a/m' on top, 1 layer of unsaturated polyester resin was added.
Dry at 00℃ for 5 minutes, then print a wood grain pattern on it, dry it, and then apply the same unsaturated polyester resin as before at 30g/rn! It was applied and allowed to penetrate into the inside of the glass sheet, and dried at 100° C. for 10 minutes to obtain a transfer sheet.

Next, the transfer sheet was placed on a 7 mm thick particle board with the pattern side facing the particle board, and the unsaturated polyester resin was cured by heating and pressure.The paper and polypropylene film were then removed. A decorative board was obtained.

It is a diagram.

(1)...Release sheet (2)...Glass sheet (3)..., pattern layer (4)...Thermosetting resin (5 )...Transfer sheet (6)...
...Substrate (7) ...Glass powder patent application Representative Kazuo Suzuki, Toppan Printing Co., Ltd.

Claims (1)

[Claims] A thermosetting resin mixed with glass powder is applied to the surface of the female sheet, and then treated with a silane coupling agent.
Then, a transfer sheet made by stacking glass sheets with a pattern layer on one side with the pattern layer side facing up, and coating the same thermosetting resin as the thermosetting resin on top of the glass sheet is placed on any substrate. A method for manufacturing a decorative board, which comprises stacking the mold release sheet side up, applying heat and pressure to harden the thermosetting resin, and then removing the mold release sheet.