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Physical method for regulating and controlling timber color

A wood and color technology, applied in the field of wood modification treatment, can solve the problems of chemical dyeing and processing technology that is difficult to be widely used, there is no discoloration treatment of wood, and durability and weather resistance are not easy to guarantee.

Inactive Publication Date: 2003-10-22
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chemical dyeing is easy to cause pollution, and the durability and weather resistance after dyeing are not easy to guarantee
Therefore, chemical dyeing processing technology is difficult to obtain large-scale promotion and use in the field of fast-growing poplar processing
At present, there is no technical report on the application of physical processing methods to discoloration of wood in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The fast-growing poplar is rotary-cut into 1.0mm-thick veneers, and dried to a moisture content of about 15%. Stack the fast-growing poplar veneers crosswise in a sealed tank made of stainless steel, and pass in saturated steam with a pressure of 2.5MPa and a temperature of about 130°C for 1 hour, and the fast-growing poplar veneers can change from their original light yellow-white color. Changes to a color similar to red beech wood. It has been determined that the mechanical property attenuation of the fast-growing poplar veneer is ≤3%. The moisture content after discoloration treatment is about 20%.

Embodiment 2

[0013] The fast-growing poplar is rotary-cut into 1.0mm-thick veneers, and dried to a moisture content of about 15%. Stack the fast-growing poplar veneers cross-stacked in a sealed tank made of stainless steel, and treat them with saturated steam at about 140°C for 2 hours. . It has been determined that the mechanical property decay of the fast-growing poplar veneer is ≤5%. The moisture content after discoloration treatment is about 25%.

Embodiment 3

[0015] The fast-growing poplar is rotary-cut into 1.0mm-thick veneers, and dried to a moisture content of about 25%. Stack the fast-growing poplar veneers cross-stacked in a sealed tank made of stainless steel, and treat them with saturated steam at about 130°C for 1 hour. . It has been determined that the mechanical property attenuation of the fast-growing poplar veneer is ≤8%. The moisture content after discoloration treatment is about 25%.

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Abstract

The present invention relates to a modification treatment technology of wood, belonging to the field of wood working technology, and is characterized by that the wood (mainly is quickly-grown wood with light colour) is placed into a closed container, then saturated steam whose temp. is less than 200 deg.C can be introduced to make treatment. By regulating the controlling initial water content of wood, temp. of saturated steam and time of treatment and on the premise of that the mechanical property of quickly-grown wood can not be affected the initial colour of the quickly-grown wood can be changed into dark colour, until the wood colour is changed into brown colour, so that the decorative property and decorative effect of the quickly-grown wood can be greatly raised.

Description

1. Technical field [0001] The invention belongs to the wood modification treatment technology in the technical field of wood processing. 2. Background technology [0002] Due to the increasing shortage of wood resources and the rapid development of wood processing technology, the processing and utilization technology of fast-growing wood is booming at home and abroad. Poplar is a very important fast-growing wood resource. Because American black poplar, European black poplar and their hybrid combination series (hereinafter referred to as fast-growing poplar) grow fast, have wide adaptability and high survival rate of afforestation, their processing and utilization technology The research has attracted much attention at home and abroad. The main defect in the use of fast-growing wood is the poor physical and mechanical properties of the material. With the continuous development and progress of technology, engineers and technicians in related fields have explored and studied ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K7/00
Inventor 张晓冬朱一辛关明杰
Owner NANJING FORESTRY UNIV
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