JPS591253A - Manufacture of decorative board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to a method for manufacturing decorative laminates.

Conventionally, in order to improve the strength of the decorative veneer surface, the so-called W2C method has been adopted, in which the decorative veneer is immersed in a resin solution and processed with a resin. However, this method requires a large-sized dipping device, and in order to uniformly impregnate the inside of the decorative veneer with resin, a decompression device or a pressurization device is required.

Furthermore, there is a problem in that the decorative veneer impregnated with resin is difficult to handle.

On the other hand, a method has been proposed in which a sheet of glass nonwoven fabric impregnated with resin is placed on a decorative veneer and then pressed. The problem is that the number of steps increases. Therefore, if you try to press a resin-impregnated sheet onto the decorative veneer at the same time as adhering the base plate and the decorative veneer, if the adhesive and the resin impregnated into the sheet are different, the difference between the two resins during hot pressing may It was difficult to achieve a uniform finish due to differences in fluidity. Furthermore, in the method of placing a resin-impregnated sheet on a decorative veneer and pressing it, the resin is not sufficiently impregnated into the decorative veneer, resulting in inferior strength compared to the above-mentioned W2C method.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for manufacturing a decorative laminate that can easily produce a decorative laminate with a good finish, a beautiful wood grain pattern, and excellent strength.

One embodiment of this invention will be described based on the drawings. That is, the method for manufacturing this decorative board includes a resin-impregnated sheet using a fibrous sheet.1. 1' was superimposed on both sides of the decorative veneer 2, and heated and pressed onto the base plate 3 to bond the base plate 3 and the decorative veneer 2 with the resin impregnated into the resin-impregnated sheet 1', and placed on both sides. Resin-impregnated sheet) 1.1' The resin is permeated into the decorative veneer 2 to improve the physical properties.

Resin-impregnated sheets 1 are applied to both sides of the decorative veneer 2 by heating and pressing.
．． 1'Th each and heat and press at the same time. It is preferable to adopt a so-called one-stage press method, but if necessary, a resin-impregnated sheet 1 may be inserted between the decorative veneer 2 and the base plate 3.
After heat-pressing with the veneer 2 interposed, the same resin-impregnated sheet 1 is placed on the decorative veneer 2 and heat-pressing is performed. A so-called two-stage press method may also be adopted. In either the one-stage press method or the two-stage press method, the resin is infiltrated into the interior from both sides of the decorative veneer 20, so the voids inside the decorative veneer 2 are filled with the infiltrated resin, preventing uneven impregnation. This makes it possible to obtain a uniform decorative board.

The resin-impregnated sheet) 1.1' is obtained by impregnating a fibrous sheet with a polymerizable resin. As a fibrous sheet,
For example, woven or non-woven fabrics made of natural fibers or recycled fibers such as kraft paper and rayon, woven or non-woven fabrics made of synthetic fibers such as vinylon, polyester 6 acrylic, and nylon, and glass woven fabrics or glass non-woven fabrics using glass fibers. A mixed sheet using two or more of these fibers can also be used. Examples of the polymerizable resin include polyester, diallyl phthalate resin, and epoxy resin. The physical properties of the decorative board obtained vary greatly depending on the fibrous sheet and polymeric resin used, so it is preferable to select the fibrous sheet and polymeric resin so as to obtain the desired physical property values. When using synthetic fiber non-woven fabric or glass cloth as the material sheet, the decorative board has less moisture absorption and hardly deteriorates. Further, when a diallyl phthalate resin is used as the resin, it has particularly excellent impact resistance and can be imparted with resistance to alkalis and organic solvents.

Furthermore, the combination of polyester resin and glass cloth can impart self-extinguishing properties.

However, by placing the resin-impregnated sheet 1.1' in which a fibrous sheet is impregnated with the resin described above on both sides of the decorative veneer 20 and heat-pressing it on one board 3, the resulting decorative board is High surface hardness, easily scratched<<, crack resistance, light resistance.

It also has excellent weather resistance.

Further, by making the refractive index of the fibers of the fibrous sheet and the refractive index of the impregnated resin after hardening close to each other, the finish of the surface of the decorative board can be significantly improved.

As described above, the method for manufacturing a decorative board of the present invention is as follows.

By placing resin-impregnated sheets using fibrous sheets on both sides of a decorative veneer and heat-pressing them onto a single plywood sheet, it is possible to create a good finish with a beautiful wood grain pattern, and it also has excellent strength. This has the effect of making it possible to easily obtain a modified undergarment board.

Next, a method for manufacturing a decorative board of the present invention will be explained with reference to Examples.

Example 1 A glass nonwoven fabric having a thickness of 0.1 m and a specific gravity of 0.55 was impregnated with polyester resin to obtain a resin-impregnated sheet with a weight increase rate of 60 to 70 inches after impregnation of the glass nonwoven fabric.

This was placed on both sides of a 0.3 m thick decorative veneer (sliced pine veneer), placed on a base plate, and subjected to a pressure of 5 Kjp/cWi.
, and was heated and pressed at a temperature of 110 to 120°C for 3 minutes.

The obtained decorative board had very high surface strength and almost no cracks were observed.

Example 2 The fibrous sheet was replaced with a glass nonwoven fabric with a thickness of 0.12
A surface-reinforced decorative board was obtained in the same manner as in Example 1, except that a polyester nonwoven fabric having a specific gravity of 0.47 was used. This item had a clear wood grain pattern on the decorative veneer, and was in excellent finishing condition.

Furthermore, no cracks were observed in the anti-touch test.

Example 3 A polyester nonwoven fabric having a thickness of 0.08 tar and a specific gravity of 0.45 was impregnated with diallyl phthalate resin to obtain a resin-impregnated sheet with a weight increase rate of 60 to 65 inches after impregnation.

This was placed on both sides of a decorative veneer (sliced veneer with a zelkova grain pattern), and the pressure was 5Ky/1-I+ on a 15m thick plywood! , and heat-pressed at a temperature of 140° C. for 4 minutes. The obtained surface-reinforced decorative plywood had excellent impact resistance and chemical resistance.

Next, a surface-reinforced decorative board was obtained in the same manner using a two-stage press method instead of the one-stage press method used in Examples 1 to 3. This product was no different from the decorative boards obtained in Examples 1 to 3 in terms of physical properties and finish.

[Brief explanation of the drawing]

The drawing is a sectional view showing a decorative board obtained according to an embodiment of the present invention. 1.1...resin-impregnated sheet, 2...decorative veneer,
3... Base plate

Claims (3)

[Claims] (1) A method for manufacturing a decorative veneer, which comprises placing a resin-impregnated sheet using a fibrous sheet on both sides of the decorative veneer rh, and heat-pressing it onto a base plate. (2) The method for manufacturing a decorative veneer according to claim 1, wherein the resin-impregnated sheets are placed on both sides of a decorative veneer and are heat-pressed at the same time. (3) The resin-impregnated sheet is interposed between the decorative veneer and the plywood, and after heat-pressing, the resin-impregnated sheet is further placed on the decorative veneer and heat-pressed. A method for manufacturing decorative laminates.