JPS61102208A - Method of improving grain of wood - 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 [Technical Field] The present invention belongs to the field of wood veneer manufacturing technology, particularly to the field of wood dyeing technology.

[Background technology] Conventionally, the grain of wood veneer was used for decorative purposes;
Efforts were made to express the beautiful wood grain as much as possible. One way is to obtain natural wood with a unique wood grain 2 as shown in Figure 1, so-called precious wood, and process it into precious wood veneer 1 and use it as a decorative veneer, or use low-grade raw wood as a decorative veneer. After rotary lacing, after passing through appropriate intermediate processes, it is laminated and pressed to create a flitch, which is then sliced to artificially express the wood grain (
laminated veneer) etc. have been put into practical use. However, with the depletion of natural resources, precious wood veneers have become difficult to obtain, while laminated veneers have a complicated manufacturing process, making it difficult to obtain the desired wood grain. However, it was thought that it would be practically convenient if there was a way to easily obtain natural wood grain as a veneer.

[Objective of the Invention] This invention has been made in view of the above circumstances, and provides a method for manufacturing a decorative veneer that can be easily used for decorative wood grain from a material veneer with less noticeable wood grain. The purpose is to

[Disclosure of the Invention] The present invention provides a method for improving wood grain, which is characterized by adding polyethylene glycol to a dyeing bath when dyeing a material veneer made from raw wood by a method such as rotary lace. It provides:

Originally, the wood grain of rotary lace veneers obtained from South Sea wood (such as Tepa wood) was not clear due to the unique attributes of South Sea wood, and the wood grain could not be used as is for decorative purposes. However, by adding polyethylene glycol to the bath when dyeing even such veneers, the wood grain of the veneer becomes very noticeable after dyeing, making it possible to use it as a decorative veneer. .

The wood targeted by this invention refers to wood whose grain is not very noticeable, and in most cases, South Sea wood is targeted. However, this does not mean that there are any particular problems with the physical properties of the wood other than the grain. It is also possible to apply the method of the present invention as a remedy for defective raw material veneers.

The first method of dyeing is to immerse the veneer in a dye bath, and the second method is to apply a dye solution to the veneer or print it.
There is a third method that combines the second method with a steaming process, but the third method gives the most preferable results.

This will be explained below using examples.

Example 1 Tepa raw wood was rotary laced to a thickness of one crane to obtain a material veneer. From among these, veneers with relatively noticeable wood grain were selected by visual inspection and bleached. Next, a commercially available dye and polyethylene glycol (PEG) were mixed in the following formulation, immersed in a dye bath, and heated and dyed at 95±3° C. for 3 hours.

A289 (commercial dye) 0.05% PEG
The wood grain of the veneer obtained as a result of 1.0% or more was more conspicuous than in the case of an experiment without adding polyethylene glycol. And it could be used as is as a decorative veneer.

Example 2 In Example 1, the dyeing method was changed to a heating steaming method. The formulation of the staining solution was as follows.

Water 100 parts by weight A 289 2 parts by weight PEG 50 parts by weight However, in the heating steaming method, the water content is 60%
150 g of the above dyeing solution was applied to a decolorized veneer by double-sided printing.
Fifty veneers coated with /rd were stacked and heated and steamed at 85±3° C. for 2 hours.

As shown in the perspective view of FIG. 2, the resulting veneer 3 had a moderate grain size of 2.4, and could be used as a decorative veneer as it was.

[Effects of the invention] This invention is characterized by using a dyeing solution containing polyethylene glycol when dyeing the material veneer, so that the wood grain of the wood veneer, where the wood grain is not noticeable, becomes clearer. It has the effect that it can be done.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the state of a conventional wood veneer, and FIG. 2 is a perspective view showing the state of the wood grain of the veneer obtained as a result of implementing the present invention. ■ is veneer 2 is wood grain

Claims (2)

[Claims] (1) A wood grain improvement method characterized by using a dyeing solution containing polyethylene glycol when dyeing the material veneer. (2) A method for improving the grain of wood according to claim 1, characterized in that steaming is applied in addition to dyeing.