Physical dyeing method for lumber

A dyeing method and wood technology, applied in the fields of wood dyeing and wood physical dyeing, can solve the problems of increasing the difficulty of treating wood dyeing wastewater, uniform dyeing of hard-to-thick wood, and damage to the physical and mental health of the people. The effect of low cost and improved anti-corrosion performance

Inactive Publication Date: 2009-02-18
广西贺州恒达板业股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the extensive use of artificially synthesized aromatic compounds such as PVA (polyvinyl alcohol) slurry and new additives has greatly increased the difficulty of treating wood dyeing wastewater.
In the past, the treatment of dyeing wastewater paid too much attention to administrative means and neglected the technical and ideological guidance of enterprises, and as a result, there were phenomena such as entrusted with punishment and orders that could not be followed. Not only our environment was polluted, but the people's physical and mental Health is damaged. Therefore, although chemical staining of wood improves the use value of wood and the added value of wood, the pollution to the environment and the cost of wastewater treatment are far greater than the value contribution of wood staining.
In addition, the chemical dyeing of wood is limited by the size of dye particles, dyeing process and dyeing equipment, it is not easy to dye thick wood evenly, and the ideal dyeing effect cannot be achieved.

Method used

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  • Physical dyeing method for lumber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take oak wood as an example. When processing, the 25mm thick oak wood with a moisture content of about 12% is first planed and planed. At this time, the thickness of the wood is 22mm; Under the same conditions, keep warm for 15 minutes, 45 minutes, 60 minutes and 90 minutes respectively; then take the wood out of the hot press and cool it down to 60°C in the room; , under the condition that the relative humidity is 75%, the moisture content of the wood can be adjusted to 5-7%. The staining results are shown in Table 1.

Embodiment 2

[0019] Take birch wood, for example. When processing, first control the moisture content of planed birch wood with a thickness of 22mm to about 7-10%; then put the wood into a hot press with a temperature of 250°C, and keep it warm at 250°C for 15 minutes, 45 minutes, 60 minutes and 90 minutes; then the wood is taken out from the hot press and cooled to 60°C indoors; finally, the wood is placed in a temperature-adjusting and humidity-adjusting box at a temperature of 80°C and a relative humidity of 75%. Just adjust the moisture content of the wood to 5-7%. The staining results are shown in Table 1.

Embodiment 3

[0021] Take Ash wood as an example. When processing, first control the moisture content of 4mm-thick planed Ash wood to about 10-15%; Minutes, 12 minutes and 15 minutes; then the wood is taken out from the heat press and cooled to 60°C indoors; finally, the wood is placed in a temperature and humidity control box at a temperature of 80°C and a relative humidity of 75%. Next, adjust the moisture content of the wood to 5-7%. The staining results are shown in Table 1.

[0022] Table 1 Wood staining results

[0023]

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Abstract

The invention provides a method for physically dyeing wood, which belongs to the technical field of wood processing. The method for physically dyeing the wood is to heat the wood and control temperature and time for heating to dye the wood. The method for physically dyeing the wood has the characteristics of small equipment investment, small production field, simple process and short treatment period; moreover, no pollution is generated during dyeing treatment, with safe production and high production efficiency; besides, the dyeing process does not require water vapor, so that the method has the advantages of no water consumption, small heat energy consumption, energy conservation, low production cost and the like during the process of dyeing treatment. Furthermore, the thickness of dyed wood is not restricted, and the method overcomes the defects of deformation, cracking, color difference and the like for the wood during production process, and has high product quality; and dyed wood has dimension stability, improved noncorrosibility and wide application range.

Description

technical field [0001] The invention relates to a wood dyeing method, in particular to a wood physical dyeing method, which belongs to the technical field of wood processing. Background technique [0002] In order to meet people's needs and improve the decorative and aesthetic value of wood products, it is very necessary to dye wood. Wood staining can improve the quality of wood surface, improve the visual characteristics of wood and increase the added value of wood. At present, the wood dyeing method that usually adopts at home and abroad all adopts chemical dyestuff to dye wood. Composition, wood cellulose is rich in hydrophilic groups such as hydroxyl (-OH), carboxyl (-COOH) and other functional groups. The chemical dye passes through the wood capillary channel with the aqueous solution, diffuses through the wood cell wall, and settles on the cellulose surface to stain the wood. Wood chemical dyeing is a processing process in which dyes and wood are chemically or physi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/02
Inventor 涂登云关丽涛高振忠孙瑾郭琼云虹冼迪研徐淑仪
Owner 广西贺州恒达板业股份有限公司
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