JPS62249706A - Manufacture of reinforced decorative veneer - 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] 3. Scope of Claims [Technical Field] The present invention relates to a method for manufacturing reinforced decorative veneer used for edge decks and the like.

[Background technology]

In the so-called WPC (wood plastic combination) method, which improves the surface strength of decorative wood veneers by impregnating them with resin, there is a proportional relationship between the thickness of the veneer and the grain of the wood. The larger the size, the better the grain quality and the more beautiful the wood grain will be. However, if the thickness of the veneer is made too large, the rigidity of the veneer will increase, so decorative boards made by gluing this to plywood are installed on floors, etc.
When removing the adhesive tape after installation, if there are hangnails or the like, the decorative veneer and plywood may continuously peel off.

Furthermore, depending on the tree species used (for example, Japanese pine, Japanese toga, etc.), the wood may have many defects, resulting in an extremely low yield. Many of these defects include mold, stains, mold, and contamination.

Furthermore, for the grain of decorative veneer that increases the color tone difference between wood grain and non-wood grain, as shown in the drawing, the decorative veneer consists of a single wood part l and a sawn wood part 2 (wood grain) on the structure of the wood. When 3 is subjected to WPC treatment to impregnate resin, the transparency of the veneer 3 increases, the color of the colored adhesive 5 interposed between the decorative veneer 3 and the plywood 4 is reflected on the surface, and the single material part 1 is The color becomes darker than the sawn wood part 2, and the single wood part 1 becomes visible as wood grain. However, in the heartwood part of the tree species used, the permeability of the single wood part 1 was reduced due to resin impregnation, the color transfer was reduced, and the wood grain was reduced. This is because the tracheid or conduit 6 shown in the drawings accumulates dull materials due to the core material, which impairs the impregnability of the resin.

[Purpose of the invention]

The objects of this invention are (A) to prevent resin-impregnated decorative veneer and plywood from peeling off, (B) to remove material defects contained in decorative veneer and improve material yield, and (C) ) To provide a method for manufacturing a reinforced decorative veneer with improved graininess of the decorative veneer.

[Disclosure of the invention]

The method for producing a reinforced decorative veneer of the present invention is characterized by subjecting the decorative wood veneer to at least one chemical treatment among bleaching, acid, alkali, and coloring, and then impregnating it with a resin. .

As described above, according to the present invention, prior to impregnating the veneer with resin, a specific chemical treatment is performed, so that the rigidity of the veneer is reduced and separation of the decorative veneer and the plywood is prevented. Material defects such as resin and stains are removed, impurities in the core material are removed, resin impregnation is improved, and the permeability and wood grain of the decorative veneer are improved.

The chemical treatment described above is not limited to just one type (it is also possible to combine two or more types depending on the 4M type used and the color tone of the target product. In particular, bleaching treatment can cause extreme changes in the color of the material. However, since the original color tone of the wood is lost, it is preferable to perform alkali treatment or acid treatment after bleaching, or to perform coloring treatment with dyes or chain additives.

Chemical treatment is carried out by immersing the decorative veneer in a solution containing bleach, acid, alkali, or coloring agent at room temperature or under heating. At this time, the decorative veneer is subjected to vacuum to improve impregnation. The drug may be impregnated under pressure or under pressure.

In addition, WP has traditionally been used as the resin to be impregnated into decorative veneers.
Any of the resins used for C-reinforced plates can be used.

In this way, the decorative veneer that has been chemically treated and resin-impregnated is adhered to the plywood metal plate 4 via the colored adhesive 5, and reinforced decorative plywood (WPC edge deck) is attached as shown in the drawing. obtain. This one is for floors and walls.

Used as a building material for ceilings, etc.

Next, the method of the present invention will be explained in detail with reference to Examples.

Example 1; Rice tongs containing crab and stains were sliced into 0.6 m thick slices, and sliced into 2% hydrogen peroxide solution (pH 1o).

The veneer was soaked at a temperature of 50° C. for several hours to remove stains, stains, etc. inside the veneer. Then, it was washed with clean warm water to remove excess processing solution. Furthermore, the bleached Yoneko veneer was immersed in an acid aqueous solution (pH 1 to 2) at a temperature of 50° C. for several hours to restore the color to a color close to the color before bleaching.

This was washed again with hot water and the processing of the veneer was completed.

Then, after drying the veneer, it was impregnated with resin and dried. This was pressure-bonded onto plywood using a colored adhesive to create a WPC edge deck with a reinforced surface.

Compared to conventional products that were not chemically treated, this edge deck had improved wood grain, removed defects such as tar and stains, and improved yield and quality. In addition, when a knife blade was inserted between the glued plywood and the veneer, unlike conventional edge decking, the veneer was less rigid, so no cuts were made and the veneer did not separate. Ta.

Example 2: Instead of acid treatment after bleaching, dye solution (
A WPC edge deck was produced in the same manner as in Example 1, except that it was immersed in a solution (pH 9 to 10) at 95° C. for several hours and dyed.

Similar to Example 1, this product had improved wood grain, removed material defects, improved yield from 44% to 60%, and did not separate from the veneer and plywood.

〔Effect of the invention〕

According to this invention, since the chemical treatment described above is performed before the veneer is impregnated with resin, the rigidity of the veneer is reduced and peeling of the decorative veneer and the plywood is prevented, and In addition, it removes material defects such as stains, removes impurities in the core material, improves resin impregnation, and improves the permeability and grain of the decorative veneer.

[Brief explanation of drawings]

The drawing is an explanatory diagram showing the structure of the edge deck (decorative board).

Claims (1)

[Claims] A method for producing a reinforced decorative veneer, which comprises subjecting a decorative wooden veneer to at least one chemical treatment among bleaching, acid, alkali and coloring, and then impregnating it with a resin.