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Wood veneer dyeing method

A technology for wood veneer and dyeing method, applied in the field of wood dyeing, can solve the problems of unstable color of final products, high dye loss, poor dye penetration, etc., and achieves low cost, good dye penetration, and simple process operation. Effect

Inactive Publication Date: 2019-11-12
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these dyes have high water solubility, low dye uptake, and high dye loss, which makes the color of the final product unstable and poor in penetration.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a. Preparation of pretreatment liquid: 0.2g naphthol AS (structural formula: ), a small amount of sodium hydroxide and ethanol to make a slurry, add a small amount of boiling water and stir to dissolve, then add the remaining sodium hydroxide and water to prepare a pretreatment solution containing 1% naphthol AS mass fraction, the concentration of sodium hydroxide is 5.0g / L, then add 1g sodium chloride and stir evenly;

[0026] b. Wood veneer pretreatment: immerse the poplar veneer to be dyed (thickness about 1.2mm) in the pretreatment solution, the bath ratio is 1:20, add 0.1g of wetting agent JFC, at 40 ℃ 40kHz ultrasonic treatment for 60 minutes, so that the naphthol AS can be adsorbed on the surface of the wood and penetrate into the interior of the wood, interact with a large number of hydroxyl and carboxyl groups in the wood structure and adsorb and deposit on the surface and interior of the wood, and take out the wood chips;

[0027] c. Preparation of developer...

Embodiment 2

[0030] a. Preparation of pretreatment liquid: 0.2g naphthol AS-D (structural formula: ), a small amount of sodium hydroxide and ethanol to make a slurry, add a small amount of boiling water and stir to dissolve, then add the remaining sodium hydroxide and water to prepare a pretreatment solution containing 1% naphthol AS-D, sodium hydroxide Concentration is 5.7g / L, then add 1.2g potassium chloride, stir evenly;

[0031] b. Wood veneer pretreatment: immerse the poplar veneer to be dyed (thickness about 1.2mm) in the pretreatment solution, the bath ratio is 1:20, add 0.1g of wetting agent JFC, at 50 ℃ 40kHz ultrasonic treatment for 50 minutes, so that the naphthol AS-D can be adsorbed on the surface of the wood and penetrate into the interior of the wood, interact with a large number of hydroxyl and carboxyl groups in the wood structure and adsorb and deposit on the surface and interior of the wood, and take out the wood chips;

[0032] c. Preparation of developer solution: We...

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PUM

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Abstract

The invention discloses a wood veneer dyeing method. The wood veneer dyeing method includes the following steps: a coupling agent A, a small amount of sodium hydroxide and ethanol are blended into paste, a small amount of boiling water is added, stirring is conducted to enable a mixture to be dissolved, then remaining sodium hydroxide and water are added to prepare pre-treatment liquid, then an appropriate amount of inorganic salt is added, and even stirring is conducted; to-be-dyed veneers are dipped in the pre-treatment liquid, the bath ratio is 1:(15 to 20), an appropriate quantity of wetting agent is added, ultrasonic treatment is conducted for 30-180 min at 30-60 DEG C, and wood plates are taken out; a color developing agent B is dissolved in an inorganic acid solution, cooling is conducted to 0-10 DEG C through ice, sodium nitrite is gradually added under stirring, and a stirring reaction is conducted for 1-30 min at 1-10 DEG C; and the pre-treated wood plates are dipped in a color developing agent solution, the bath ratio is 1:(15 to 20), the temperature is increased to 10-20 DEG C, the pH value is adjusted to 5 to 8, dyeing is conducted for 10-120 min, and the wood plates are taken out and aired. The dyeing method is easy to operate and industrialize, the wood veneers can be dyed into the color of valuable timber, and the additional value of the wood veneers is increased.

Description

technical field [0001] The invention belongs to the field of wood dyeing, in particular to a wood veneer dyeing method. Background technique [0002] Wood staining is the use of chemical or physical chemical methods to combine dyes with wood to change its original color, so as to meet consumers' needs for wood appearance color, improve the surface quality of fast-growing wood, improve its visual effect and decorative performance, and imitate precious wood. [0003] At present, wood dyeing usually adopts the traditional exhaust dyeing process, and most of the commonly used dyes are water-soluble organic dyes, including acid dyes, reactive dyes, direct dyes, cationic dyes, etc. Acid dyes are a type of anionic dyes, mainly composed of azo and anthraquinone dyes, and their molecular structure contains a large number of carboxyl, hydroxyl or sulfonic acid groups; reactive dye molecules contain reactive groups, which can be combined with hydroxyl groups in wood Form covalent bon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/02B27K3/04B27K5/00
CPCB27K3/04B27K5/0065B27K5/02
Inventor 张宾柳荣展潘颖张建波石宝龙马立标
Owner QINGDAO UNIV