JPH10235608A - Decorative panel for sticking to veneer and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a construction and production for a decorative panel enhancing a crack resistant properties by a simple method. SOLUTION: In the decorative laminate, a treatment with a good permeability is coated on a surface of a plywood to perform an impregnation treatment of a surface veneer of the plywood, next, an adhesive is coated to adhere a veneer. By this manner, a movement of a fiber of the surface veneer of the plywood which is a factor of a crack can be restrained to restrain an effect to the veneer adhered on the surface to the minimum to reduce a development of the crack of the veneer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a veneer-attached decorative board used for furniture, flooring, wall material and the like, and a method for producing the same.

[0002]

2. Description of the Related Art There is a veneer-attached veneer in which a thinly-cut veneer is adhered to the surface of a plywood, which is widely used for furniture, floor materials, wall materials and the like. However, the veneer adhered to the surface of the veneer or veneer expands and contracts due to changes in ambient temperature and humidity, and thus has a problem in that cracks occur on the surface of the veneer. This is considered to be largely due to the movement of the fibers of the veneer on the plywood surface of the substrate.

Therefore, in order to improve crack resistance, a method of combining a medium density fiberboard (MDF) on the surface of the plywood so that the plywood does not directly contact the veneer, Japanese paper, cold gauze, etc. between the plywood and the veneer A method of buffering the movement of the fibers of the plywood with the backing material of the above, a method of improving the hardness by WPC (synthetic resin injection) treatment of the veneer itself so as to oppose the movement of the fibers of the plywood, and the like. It has been proposed and the effects have been confirmed in both cases.

[0004]

However, all of these methods have involved complicated manufacturing steps and increased costs. An object of the present invention is to provide a configuration and a manufacturing method capable of improving crack resistance by a simple method.

[0005]

According to a first aspect of the present invention, in a veneer-attached veneer in which a veneer is adhered to the surface of a plywood, a treatment agent having good permeability is previously applied to the front veneer of the plywood. The structure according to claim 2 is characterized by being impregnated, applying a treatment agent having good permeability to the surface of the plywood, impregnating the front veneer of the plywood, and then applying an adhesive. It is characterized by sticking a veneer.

A plywood having a thickness of about 5 to 12 mm is used as the base material. The veneer is made of oak or zelkova with a thickness of 0.3 to 1m
The decorative veneer has a beautiful grain pattern obtained by thinning it to about m. The adhesive used for attaching the veneer may be a commonly used adhesive such as aqueous vinyl urethane, urea-modified latex, or vinyl acetate resin emulsion.

As the treating agent, polyester acrylate, epoxy acrylate, polyurethane resin, polyethylene glycol and the like are used. A small amount of a conventional adhesive may be added to the treating agent to improve the peeling resistance between the plywood and the veneer.

[0008] The surface of the veneer after the veneer is adhered is applied using a commonly used paint such as a UV (ultraviolet) curable polyurethane resin or an aminoalkyd resin. The coating apparatus is based on a known means such as a roll coater or a curtain flow coater. Before painting, a colored wiping process may be performed with a stain.

[0009]

Example 1 Polyethylene glycol + modified melamine resin (weight ratio 8: 2) on the surface of a 12 mm thick Rawan plywood
80 g / cm 2 and impregnated into a veneer front veneer to cure, then apply an aqueous vinyl urethane adhesive to 65 g / cm 2
Apply a 0.3 mm thick veneer veneer by hot pressing.
Thermocompression bonding at 20 ° C, 8kg / cm2, 5 minutes, U
Finished with V-amino coating, the desired veneer-attached decorative board was obtained.

[0010]

Example 2 Polyester acrylate was applied on the surface of a 12 mm thick rawan plywood at 60 g / cm2, and the front veneer of the plywood was impregnated and cured, and then a urea-melamine co-condensation resin adhesive was applied at 80 g / cm2. Then, the blank veneer with a thickness of 0.3 mm is hot pressed at 120 ° C., 8 kg / cm 2,
Thermocompression bonding was performed in 5 minutes, and the veneer was finished with UV amino coating to obtain a veneer-attached decorative board.

[0011]

Example 3 Epoxy acrylate was coated on the surface of a 12 mm thick rawan plywood at 50 g / cm2 and impregnated with a veneer veneer to cure, followed by application of a urea-melamine co-condensation resin adhesive at 85 g / cm2. Then, a veneer veneer having a thickness of 0.3 mm was thermocompressed with a hot press at 120 ° C. and 8 kg / cm 2 for 5 minutes, and the veneer was finished with UV amino coating to obtain a veneer-attached decorative plate.

[0012]

Comparative Example 1 Comparative Example 1 in which the treatment agent was omitted from the above configuration, Comparative Example 2 a configuration in which 3 mm thick MDF was interposed between the plywood and the veneer in Comparative Example 1, and Comparative Example 3
The structure of Comparative Example 1 is such that a Japanese paper is interposed between the plywood and the veneer, and the structure of Comparative Example 1 is that the veneer is WP
Each of the veneer-attached decorative boards having the C-treated configuration was prepared.

[0013] Then, the cold repetition B test specified in JAS was performed for 2 cycles, and the results were as shown in Table 1.

[0014]

[Table 1]

[0015]

According to the present invention, since the front veneer of the plywood is pre-impregnated with the treatment agent having good permeability, it is possible to suppress the movement of the fibers of the veneer veneer, which caused the crack. The effect on the veneer that is made and adhered to the surface can be minimized, and the occurrence of cracks in the veneer can be reduced. Further, by adding an adhesive to the treating agent, the plywood and the veneer are more firmly bonded to each other, and the peeling resistance is improved.

Claims (3)

[Claims] 1. A veneer-attached decorative board comprising a veneer attached to a surface of a plywood, wherein a veneer-treated veneer is preliminarily impregnated with a treatment agent having good permeability. 2. A veneer bonding method comprising applying a treatment agent having good permeability to the surface of the plywood, impregnating the front veneer of the plywood, and then applying an adhesive to attach the veneer. Manufacturing method of decorative board. 3. The method according to claim 2, wherein an adhesive is added to the treating agent.