Method for processing blue-stain wood

A treatment method, the technology of blue change, applied in wood treatment, wood treatment details, wood processing equipment, etc., can solve the problems affecting the post-processing performance of wood paint, little prospect, long treatment time, etc., to improve the appearance quality, Improve the application prospect and market value, the effect of uniform color

Active Publication Date: 2011-04-27
JIUSHENG WOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are studies on bleaching with alkaline solution to change the color of blue-stained wood, but because the acidity and alkalinity of wood will change after dyeing, it will affect the post-pro...

Method used

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  • Method for processing blue-stain wood
  • Method for processing blue-stain wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment is used to illustrate the processing method of the blue stained wood provided by the present invention.

[0021] Choose Canada to produce, length is 4000mm, thickness is 40mm the blue-changed twisted leaf pine (pinuscontorla) sheet material, water content is 10% by weight, and blue-change rate (being the percentage of the area of ​​blue-change part accounted for the total surface area of ​​plate) is 30 area% , the color of the blue-change part is dark blue, CIE L * a * b * color value L * Value 78.107, a * value -1.215, b * Value 24.785, CIE L of the non-blue-colored part * a * b * color value L * value 81.025, a * Value 1.832, b * Experiment with a value of 30.481.

[0022] The above board was sawed into 6 test bodies with a length of 500mm, a width of 90mm, and a thickness of 40mm. Among them, 3 test bodies had no blue stain, and the remaining 3 test bodies were partially or completely blue stained. The above-mentioned experimental body was...

Embodiment 2

[0024] According to the method of embodiment 1, the heat treatment is carried out to the blue twisted pine plate (the source is the same as that of embodiment 1), the difference is that the heating temperature is 205 ℃, and the heating time is 4 hours, and the CIE L of the wood after heat treatment * a * b* The color value was tested with a Minolta CR-300 color measuring device, and the results are shown in Table 1. Density, volume expansion rate, volume dry shrinkage rate, flexural strength, and flexural modulus of elasticity are carried out using Chinese national standard GB / T1931-1936-2009. The results are shown in Table 2. The values ​​of each indicator in Table 1 and Table 2 are average values.

Embodiment 3

[0026] This embodiment is used to illustrate the processing method of the blue stained wood provided by the present invention.

[0027] Choose Canada to produce, length is 4000mm, thickness is 40mm the blue twisted lobe pine (pinuscontorla) sheet material, water content is 13% by weight, and blue change rate (being the percentage of the area of ​​blue change part accounted for the total surface area of ​​plate) is 50 area% . The color of the blue-changed part is dark blue, CIE L * a * b * color value L * Value 74.61, a * value -1.42, b * Value 21.02, CIE L of the non-blue part * a * b * color value L * Value 77.84, a * Value 0.83, b * Experiment with a value of 26.40.

[0028] The above board was sawed into 6 test bodies with a length of 500mm, a width of 90mm, and a thickness of 40mm. Among them, 3 test bodies had no blue stain, and the remaining 3 test bodies were partially or completely blue stained. The above-mentioned experimental body was placed in a closed ...

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Abstract

The invention provides a method for processing blue-stain wood. The method is characterized by comprising the following step of heating the blue-stain wood for 1-10 hours at the temperature of 190-230 DEG C under the atmosphere of protective gas with oxygen content being less than 3 percent by volume, wherein the water content of the blue-stain wood is 8-13 percent by weight. When the method is used for processing the blue-stain wood, the colour of the blue-stain wood and the color of non-blue-stain wood are uniform without differences by visual measurement, and therefore, the appearance quality of the blue-stain wood is greatly improved. In addition, the blue-stain wood is basically consistent with the non-blue-stain wood because of density and intensity changes after heat processing, therefore, the processed blue-stain wood can play the role of the non-blue-stain wood, the wood is transformed to a top grade from a low grade, and the application prospects and the market value of the blue-stain wood are greatly increased. The invention belongs to a wood processing technique with great prospects.

Description

technical field [0001] The invention relates to a method in the field of wood processing, in particular to a method for treating blue-stained wood. Background technique [0002] After felling, the wood is susceptible to the host of blue stain bacteria, which causes the wood to change color. Blue stain bacteria reproduce with low-molecular carbohydrates in wood as nutrients, and do not decompose the main components such as cellulose, hemicellulose, and lignin in wood, so they do not affect the strength of wood. However, due to the poor appearance quality of the discolored wood, the scope of use is greatly limited, for example, it can only be used in the case where the inner layer of the plywood and the building frame do not appear on the surface. Like this, just reduced its commercial value. [0003] There is currently no effective method to improve the appearance quality of blue-stained wood. There are studies on bleaching with alkaline solution to change the color of blu...

Claims

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Application Information

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IPC IPC(8): B27K5/00
Inventor 黄荣凤吕建雄周永东赵有科
Owner JIUSHENG WOOD
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