JPH022697B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for producing a textured veneer, in which a sheet-like core material impregnated with polyvinyl chloride paste is layered on a wooden veneer having a spring wood part and a summer wood part, and a cushion is placed on the core material side. The present invention relates to a method for manufacturing an uneven veneer, characterized in that the laminate is pressurized under heating conditions through a material to dent the spring material and gel the polyvinyl chloride paste. By pressing a wood veneer, which has a spring wood part and a summer wood part and has a difference in hardness, like a conifer, through a cushion material, the soft spring wood is concave, and the spring wood part is concave and the summer wood part is made. It is known to obtain an uneven veneer, that is, a raised veneer in which the veneer has a convex shape. However, this conventional method has the problem that when the press is released, the concave part of the spring material returns to its original shape, reducing the difference in concavity and convexity and reducing the effect of creating a ridge.In addition, a layer of polyvinyl chloride is formed on the surface of the wood veneer. It is necessary to strengthen the surface of the wood veneer and paint it, but if the wood veneer has unevenness, it is difficult to paint with a normal spretzer, and even with a flow coater, the unevenness of the coating may occur due to the uneven areas. There was a problem that this occurred. It is an object of the present invention to solve the above-mentioned problems and to provide a rational method for manufacturing an uneven veneer. The present invention will be explained in detail below with reference to Examples. The wood veneer used is sliced coniferous wood having spring wood and summer wood, such as Japanese toga. On the other hand, non-woven fabric,
A thin sheet-like core material, such as paper or glass paper, which is easily impregnated with polyvinyl chloride paste, is impregnated with polyvinyl chloride paste. This impregnated core material is stacked on one side of a wooden veneer and placed between the upper and lower presses, and on the core side, a cushion material such as a rubber sheet is placed between the core material and the press. The laminate with the core material is pressed under heat using a press. Then, due to the pressing through the cushion material, the spring wood part with a soft structure of the wood veneer is easily compressed and becomes concave, but the summer wood part with a hard structure is not easily compressed and becomes concave in the spring wood part. It becomes convex and is made up. At this time, the polyvinyl chloride paste impregnated into the core material is gelled and solidified by heating, and is adhered along the unevenness of the wooden veneer. Therefore, the recesses in the spring parts of the wood veneer formed by pressing are hardened by the solidification of the polyvinyl chloride paste, thereby preventing the recesses from returning. When the polyvinyl chloride paste gels, it becomes glossy and transparent, allowing the color pattern of the wood veneer to appear as is. Here, the curing conditions of the polyvinyl chloride paste can be controlled by the heat and pressure conditions of the press, but the conditions for imparting unevenness to the wood veneer are set first, and then the polyvinyl chloride paste is It is best to decide on the paste composition. For example, under heating at 140℃, 7Kg/cm ²
Under the condition of pressing for 3 minutes at a pressure of
The following formulations can be used: PVC (Zeon 121) 100 parts by weight DOP 20 DAP monomer (Osaka Soda) 50 Stabilizer 2 Benzoyl peroxide (BPO)
1. As described above, according to the present invention, a sheet-like core material impregnated with polyvinyl chloride paste is layered on a wooden veneer having a spring wood portion and a summer wood portion, and this sheet-like core material impregnated with polyvinyl chloride paste is placed on the core material side through a cushion material. By applying pressure to the laminate under heated conditions, we were able to dent the spring material and gel the polyvinyl chloride paste.
When applying unevenness to a wooden veneer by pressing through a cushion material, the polyvinyl chloride paste gels and hardens due to heating, and the solidified polyvinyl chloride paste will return to its original shape. It is possible to obtain an uneven veneer with a large difference in unevenness that can be prevented by vinyl chloride, and also to form a layer of polyvinyl chloride on the surface of the wood veneer at the same time in the process of imparting unevenness to the wood veneer. As a result, the process of imparting unevenness to the wood veneer and the surface finishing process of applying a layer of polyvinyl chloride to the wood veneer can be combined into one process, thereby streamlining the process.

[Claims]

1 Overlay impregnated paper 1 and pattern impregnated paper 2 are impregnated with a fast-curing melamine resin that hardens in 60 seconds or less at a temperature of 140°C, and core impregnated paper 3 is impregnated at a temperature of 140°C.
The backer-impregnated paper 4 is impregnated with a fast-curing phenolic resin that hardens in 60 seconds or less at ℃, and the backer-impregnated paper 4 is impregnated with the above-mentioned phenolic resin or melamine resin, and these impregnated papers are laminated and heat-cured together. An endless melamine resin decorative board that complies with JISK6903 and is molded by 2. The core impregnated paper 3, the pattern impregnated paper 2, and the overlay impregnated paper 1 are sequentially laminated on the backer impregnated paper 4, and one set of these is inserted between the steel belts of a continuous forming press machine having a steel belt to form it. A manufacturing method for endless melamine resin decorative boards that conforms to JISK6903.