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A method of precisely controlling the color of bamboo

A bamboo material and color technology, applied in wood treatment, wood processing equipment, wood treatment details, etc., can solve the problems of difficult precise control of steam pressure, bamboo color difference, high cost, etc., to achieve easy product quality assurance, easy temperature control, and easy color difference Effect

Inactive Publication Date: 2017-05-10
国家林业局竹子研究开发中心
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  • Application Information

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Problems solved by technology

The bamboo heat treatment (carbonization) method disclosed in Chinese patent CN1887551A is carried out in a carbonization tank with 2-3Mpa steam as the medium. However, high-pressure steam requires high equipment and high cost on the one hand, and on the other hand, it is difficult to accurately control the steam pressure. , resulting in higher costs, and different batches of heat-treated bamboo tend to have large color differences, which affects product quality
Chinese patent CN101024292A discloses a method of using molten zinc or tin-zinc alloy to heat-treat bamboo wood for different times to change the color, but it does not explain the color control method and uses less media

Method used

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  • A method of precisely controlling the color of bamboo
  • A method of precisely controlling the color of bamboo
  • A method of precisely controlling the color of bamboo

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Experimental program
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Effect test

Embodiment 1

[0022] 1) Establish a three-dimensional sample library for bamboo heat treatment

[0023] The colors of moso bamboo slices after being treated for 0.5, 2, 4, and 8 hours in 200°C air, soybean oil, solid paraffin, heat transfer oil, and simethicone oil are shown in figure 1 . This table can be regarded as one layer of the sample library, and then more layers are built under the same conditions as the table at other temperatures, finally forming a three-dimensional library.

[0024] 2) Convert sample library to color library

[0025] Use a colorimeter to measure the CIEL*a*b* chromaticity of the sample, the test conditions are: D65 light source 10°observation angle, the test index is lightness index L*, red-green axis chromaticity index a*, yellow-blue axis chromaticity index b *, saturation C*, hue h°, transform the three-dimensional sample library obtained in step 1) into a color library.

[0026]

[0027] 3) Primary selection of heat treatment scheme

[0028] Take the ...

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Abstract

The invention relates to a method for accurately regulating and controlling the bamboo wood color, and belongs to the technical field of bamboo wood machining. The method includes the following process steps: (1) building a bamboo wood heat treatment three-dimensional sample bank; (2) converting the sample bank into a color bank; (3) conducting primary election on the heat treatment scheme; (4) conducting multi-dimensional optimization on the heat treatment scheme; and (5) refining a database. The sample color three-dimensional database obtained after bamboo wood heat treatment is built through three factors including temperature, media and time, and a standard taking piece is provided for the heat treatment scheme of the target bamboo wood color; and due to the fact that the characteristics of the different heat treatment media are different, the reasonable heat treatment scheme from multiple technical dimensions can be selected. In addition, heat treatment on the bamboo wood is carried out through ordinary pressure air and other liquid media, a pressure container is not needed, and cost is lower; and the temperature is easy to control, the color difference is relatively easily controlled, and the product quality is easily guaranteed.

Description

technical field [0001] The invention belongs to the technical field of bamboo and wood processing, and in particular relates to a method for precisely regulating the color of bamboo. Background technique [0002] Bamboo has a wide range of applications, but the color of natural bamboo is relatively single. Heat treatment is an environmentally friendly treatment method that does not require chemicals. It can enrich the color difference of bamboo, improve the corrosion resistance of bamboo and the dimensional stability of the material. The bamboo heat treatment (carbonization) method disclosed in Chinese patent CN1887551A is carried out in a carbonization tank using 2-3Mpa steam as the medium. However, high-pressure steam requires high equipment and high cost, and on the other hand, it is difficult to accurately control the steam pressure. , resulting in higher costs, and different batches of heat-treated bamboo tend to have large color differences, which affects product quali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K9/00B27K5/02
CPCB27K5/02B27K9/002
Inventor 于辉吴再兴陈玉和黄成建陈章敏刘胜辉
Owner 国家林业局竹子研究开发中心
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