Decoloration treatment method for wooden veneer

Abstract

The invention relates to a wood decoloration treatment method belonging to the technical field of wood treatment. A decoloration treatment method for a wooden veneer, comprising the following steps of: (1) pretreatment: placing the wooden veneer into a sodium hydroxide solution; (2) basic decoloration: placing the veneer into a temporary liquid of a liquid A to be subjected to decoloration treatment: (3) acidic decoloration: placing the veneer into a temporary liquid of a liquid B to be subjected to decoloration treatment: and (4) cleaning and drying: taking the veneer out of the temporary liquid of the liquid B, and then placing the veneer into clear water to immerse for 1-2h, and drying. After the decoloration treatment method for the wooden veneer, black patina caused by bioerosion to the wooden veneer and blue patina caused by iron pollution to the wooden veneer can be thoroughly removed. The decoloration treatment method for the wooden veneer also has the characteristic of natural material color because of decoloration uniformity; meanwhile, the content of hydrogen peroxide is not high, and therefore, little damage is caused to the material, the whiteness can be up to 70% after spots caused by the blue patina and the black patina are treated, and no obvious color difference exists between the spots and an unpolluted part visually.

Description

technical field [0001] The invention relates to a wood decolorization treatment method and belongs to the technical field of wood treatment. Background technique [0002] The raw materials used for the existing recombined decorative materials are mainly artificial fast-growing materials, mainly Ayous, poplar, basswood, etc. Because the wood contains certain substances such as phenols, starch, sugar and protein, during the storage and mechanical processing of logs, a large number of black and blue spots or ribbons often appear, seriously affecting product quality. [0003] In the prior art, the wood decolorization treatment method is as described in the Chinese invention patent application number 200910153433.X, which mainly uses 35-50wt% hydrogen peroxide to decolorize wood under alkaline conditions. However, it has been proved by production practice that this method only has an effect on the blackening of the wood caused by the erosion of the color-changing bacteria, and h...

AI Technical Summary

Problems solved by technology

However, it has been proved by production practice that this method only has an effect on the blackening of the wood caused by the erosion of the color-changing bacteria, and has little effect on the bluening caused by iron pollution, and the higher concentration of hydrogen peroxide has a greater corrosion on the surface of the wood board.