Method for adjusting color of light-colored pterocarpus macrocarpus by saturated steam heat treatment

A large-fruited red sandalwood and color technology is applied in the field of wood modification and wood heat treatment, which can solve the problems that the supply of mahogany cannot meet consumer demand, affect the utilization rate of wood, the color of wood products is uniform and beautiful, and the import channels of mahogany are blocked, so as to improve the utilization of mahogany. Value and economic value, avoidance of post-processing processes, effects of enhanced physical and mechanical properties

Inactive Publication Date: 2018-12-28
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, as exports have been increasingly restricted or prohibited, the import channels of mahogany have been blocked, and the supply of mahogany cannot meet the consumption demand of the domestic market
[0003] In the process of wood processing and production, there are often dark and light-colored red sandalwood with inconsistent colors, which affects the utilization rate of wood and the uniform color of wood products. Therefore, light-colored red sandalwood is usually discarded directly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Polish the light-colored red sandalwood board with a size of 30mm×50mm×12mm (length×width×thickness) with 400 mesh sandpaper to remove the stains on the surface of the board, and soak the treated board in distilled water. The time is 24h.

[0019] (2) Put the soaked plates vertically in a pressure steam sterilizer, and put a sufficient amount of water in the lower part of the high-pressure device.

[0020] (3) The heating temperature of the pressure steam sterilizer is set to 120° C., the pressure is 0.1 MPa, and the heat treatment time is 8 hours (excluding the heating time).

[0021] (4) After the heat treatment is completed, the plates are naturally cooled to room temperature in the device and then taken out for subsequent conventional drying treatment.

[0022] In step (1), the water temperature is 20° C., and the introduction of other chemical components should be avoided during the entire soaking process.

[0023] In step (3), the heating rate should be cont...

Embodiment 2

[0026] (1) Polish the light-colored red sandalwood board with a size of 80mm×120mm×12mm (length×width×thickness) with 400 mesh sandpaper to remove the stains on the surface of the board, soak the treated board in distilled water, soak The time is 24h.

[0027] (2) Put the soaked plates vertically in a pressure steam sterilizer, and put a sufficient amount of water in the lower part of the high-pressure device.

[0028] (3) The heating temperature of the pressure steam sterilizer is set to 130° C., the pressure is 0.18 MPa, and the heat treatment time is 8 hours (excluding the heating time).

[0029] (4) After the heat treatment is completed, the plates are naturally cooled to room temperature in the device and then taken out for subsequent conventional drying treatment.

[0030] In step (1), the water temperature is 25°C, and the introduction of other chemical components should be avoided during the entire soaking process.

[0031] In step (3), the heating rate should be con...

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PUM

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Abstract

The invention provides a method for adjusting the color of light-colored pterocarpus macrocarpus by saturated steam heat treatment. Saturated steam is used as a hot medium, the conjugated structure ofthe chromophoric system and structure of wood is increased, so that the color of the light-colored pterocarpus macrocarpus is deepened and tends to be the wood color of deep-colored pterocarpus macrocarpus. The light-colored pterocarpus macrocarpus treated by the method has a uniform color, and is changed in a redder and deeper direction in color and similar to the color of the deep-colored pterocarpus macrocarpus. The processed light-colored test material red-green chromaticity index change value [delta]a* is greater than or equal to 4, yellow-blue chromaticity index change value [delta]b* is greater than or equal to 4, and lightness value [delta]L* is decreased to less than or equal to -6. The method is superior in that the color of the light-colored pterocarpus macrocarpus is adjustedby the saturated steam heat treatment, no chemical reagent is introduced, environmental protection is achieved, the cost is lower, and the method is suitable for large-scale industrial processing andproduction.

Description

technical field [0001] The invention relates to a method for adjusting the color of light-colored red sandalwood with saturated steam heat treatment, and belongs to the technical field of wood modification and wood heat treatment. Background technique [0002] Big-fruit red sandalwood is commonly known as "Burma flower". It is mainly produced in Myanmar, Laos, Vietnam and other countries. Because of its beautiful color and high cost performance, it is widely loved by ordinary consumers and has become the most potential and advantageous medium-to-high-end mahogany. one of wood. my country is a big consumer of mahogany, but mahogany raw materials mainly rely on imports. In recent years, as exports have been increasingly restricted or banned, the import channels of mahogany have been blocked, and the supply of mahogany cannot meet the consumption demand of the domestic market. [0003] In the process of wood processing and production, there are often dark and light-colored re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/00B27K3/02
CPCB27K3/0207B27K5/0085
Inventor 刘炀陈瑶高建民张鹏卫燕霞
Owner BEIJING FORESTRY UNIVERSITY
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