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Wood dyeing method of pretreatment using microwave

A dyeing method and pretreatment technology, which is applied in the field of wood dyeing, can solve the problems of shallow treatment depth, high treatment cost, and large equipment investment, and achieve the effects of fast heating speed, good treatment effect, and reduced equipment investment

Inactive Publication Date: 2008-07-30
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first two treatment methods require large investment in equipment, complex processes, and high treatment costs, while the third method has a shallow treatment depth.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take a masson pine log with a diameter of 90 mm and a length of 500 mm, and slowly dry it to a moisture content of 30%; then place the pre-dried log in a microwave dryer, turn on the microwave generator to heat and pretreat it, and microwave The radiation power is 3kw (that is, the radiation power density is 0.94w / cm 3 ), the radiation temperature is controlled at 100°C, and the radiation time is 150 seconds; then the wood heated by the microwave is quickly immersed in the pre-configured room temperature dyeing solution for 180 minutes; finally, the dyed wood is washed with water and washed with water The final dyed wood is piled into the drying kiln for post-drying treatment to obtain dyed wood. Compared to wood that had not been pretreated with microwaves, it showed a 31% increase in dye liquor absorption.

Embodiment 2

[0015] Take a catalpa plank with a thickness of 20mm, a width of 100mm, and a length of 100mm, and dry it to a moisture content of 25% in a conventional steam drying kiln; then place the pre-dried catalpa plank in a microwave dryer, and turn on The microwave generator heats the wood, and the microwave radiation power is 0.8kW (that is, the radiation power density is 4w / cm 3 ), the radiation temperature is controlled at 105°C, and the radiation time is 100 seconds; then the wood heated by microwave is quickly immersed in the pre-configured room temperature dyeing solution for 120 minutes; finally, the dyed wood is washed with water and washed with water The final dyed wood is piled into the drying kiln for post-drying treatment to obtain dyed wood. Uptake of dye liquor was increased by 43% compared to wood without microwave pretreatment.

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Abstract

The invention discloses a timber dyeing method with microwave pretreatment. The method comprises the following steps: the timber is dried with a conventional drying method to the extent that the moisture content is 20 percent to 40 percent; the microwave is used for heating pretreatment of timber, with the power density of microwave radiation controlled at 0.1-5 w / cm<3>, the radiation temperature at 80-120 DEG C, and the radiation time lasting for 30 to 480 seconds; the timber after heating pretreatment by the microwave is quickly immersed in properly prepared dye liquor in the normal temperature with the immersion time controlled at 30 to 240 minutes; finally, the dyed timber is washed with water and then piled in a drying kiln for post treatment of drying. The method of the invention has the advantages of low investment in equipment, simple technique, good effect of treatment, etc.

Description

technical field [0001] The invention relates to a wood dyeing method, in particular to a wood dyeing method using microwaves for pretreatment. Background technique [0002] Wood dyeing is a treatment process in which various pigments and dyes are coated on the surface of wood or penetrated into the interior of wood by a certain process to make the wood appear in various colors. Wood dyeing is an effective technical way to meet individual needs, expand the scope of wood use, realize the optimal use of inferior wood, and increase the added value of wood products. In production, in order to increase the dyeing depth of wood, commonly used dyeing methods include pressure method, vacuum pressure method, and hot and cold bath method. The pressure method is to place the wood and the dyeing solution in a pressure treatment tank, and use the external pressure to inject the dyeing liquid into the wood; the vacuum pressure method is to first place the wood in the treatment tank, and t...

Claims

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Application Information

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IPC IPC(8): B27K5/02
Inventor 李贤军傅峰周永东陈志林陈苇蒋全兴卢克阳林兰英
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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