Method for rapid pre-bleaching of wood

A pre-bleaching and wood technology, applied in wood treatment, wood treatment details, impregnation of wood, etc., can solve the problems of large dye consumption, poor wood dyeing effect, water pollution, etc., achieve fresh and beautiful colors, promote the dyeing process, and bleach The first effect

Pending Publication Date: 2018-09-25
南京新莱尔材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing wood dyeing processes are directly treated with dyes without pre-bleaching, which will lead to problems such as poor wood dyeing effect, large dye consumption, and serious water pollution. Simple and low cost, there is no example of using this method to pretreat wood at home and abroad

Method used

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  • Method for rapid pre-bleaching of wood

Examples

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Effect test

Embodiment 1

[0034] A method for rapid wood pre-bleaching treatment, comprising the following steps and process conditions:

[0035] (1) Adjustment of wood moisture: place fresh poplar in a ventilated place at room temperature for 24 hours, and dry naturally until the moisture content is lower than 5%;

[0036] (2) Preheating of the reactor: Pour tap water into the reactor, heat the tap water to 70°C and keep it warm for five minutes (the purpose of heat preservation is to make the temperature in the reactor uniform under the action of stirring, to avoid uneven temperature everywhere. The same will cause uneven dyeing in the later stage.), and make the temperature of the inner wall of the reactor reach 80°C;

[0037] (3) Addition of oxidant: Dissolve the oxidant completely, prepare an aqueous solution with a mass fraction of 10%, and the oxidant is percarbonamide and sodium hypochlorite, wherein the mass fraction of sodium percarbonate is 5%, and the mass fraction of sodium hypochlorite is...

Embodiment 2

[0043] A method for rapid wood pre-bleaching treatment, comprising the following steps and process conditions:

[0044] (1) Adjustment of wood moisture: place fresh poplar in a ventilated place at room temperature for 24 hours, and dry naturally until the moisture content is lower than 5%;

[0045] (2) Preheating of the reactor: pour tap water into the reactor, heat the tap water to 65°C and keep it warm for five minutes, so that the temperature of the inner wall of the reactor reaches 85°C;

[0046] (3) Addition of oxidant: Dissolve the oxidant completely, prepare an aqueous solution with a mass fraction of 9%, the oxidant is hydrogen peroxide, add 100L of the oxidant solution per 50L poplar, stir immediately and heat up to 95°C to make the wood and the solution fully contact reaction;

[0047] (4) Addition of buffering agent: Add 25L of sulfurous acid solution with a mass fraction of 5% per 50L of poplar, stir immediately after adding to mix the complexing agent solution an...

Embodiment 3

[0052] A method for rapid wood pre-bleaching treatment, comprising the following steps and process conditions:

[0053] (1) Adjustment of wood moisture: place fresh poplar in a ventilated place at room temperature for 24 hours, and dry naturally until the moisture content is lower than 5%;

[0054] (2) Preheating of the reactor: pour tap water into the reactor, heat the tap water to 65°C and keep it warm for five minutes, so that the temperature of the inner wall of the reactor reaches 80°C;

[0055] (3) Addition of oxidizing agent: Dissolve the oxidizing agent completely, prepare an aqueous solution with a mass fraction of 10%, the oxidizing agent is sodium hypochlorite and hydrogen peroxide, add 100L of the oxidizing agent solution for every 50L of poplar, immediately stir evenly and heat up to 90°C to make the wood Fully contact and react with the solution;

[0056] (4) Addition of buffering agent: Add 25L of sulfurous acid solution with a mass fraction of 6% per 50L of po...

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Abstract

The present invention discloses a novel method for pre-bleaching and brightening of wood. The method comprises the following steps: (1) adjustment of wood moisture: subjecting fresh wood to natural drying at first and then to drying by rapid hot air; (2) introducing tap water into a pressure reaction tank, heating the tap water to 50 to 120 DEG C; and 3) successively injecting an aqueous solutionof an oxidizing agent, a buffering agent and a reducing agent into the pressure reaction tank, and carrying out stirring for a rapid reaction so as to achieve high whiteness and surface brightening effect of the wood. According to the invention, a novel catalytic system is used for pre-bleaching of the wood, so the color of the wood is brightened and whitened in a short period of time and looks fresh and agreeable, processing cost is greatly reduced, and a foundation is laid for later flaking, peeling, deep dyeing and other functional processing of the wood.

Description

technical field [0001] The invention relates to a method for rapid wood pre-bleaching treatment, which is characterized by high efficiency and low cost. The wood pretreated by the method of the invention can be used in furniture manufacturing, interior decoration, vehicle manufacturing, packaging box manufacturing and other fields. Background technique [0002] Wood is one of the first materials widely used by humans. Wood has the following advantages: renewable, low strength-to-weight ratio, thermal and electrical insulation, easy to process, has natural beautiful patterns, luster and color, can reflect infrared rays, absorb ultraviolet rays, and has good Excellent acoustic effect, elastic and plastic, can adjust temperature and dehumidify. Therefore, wood is widely used in furniture manufacturing, interior decoration, vehicle manufacturing, packing box manufacturing and other fields. The original wood is rarely used directly. Generally, it will be treated with dyes to mak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/52B27K5/04
CPCB27K3/52B27K5/04
Inventor 刘德礼
Owner 南京新莱尔材料科技有限公司
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