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Enhanced high-temperature heat treated wood and manufacturing method thereof

A technology of high temperature heat treatment and manufacturing method, applied in the direction of wood heat treatment, wood treatment, humidity control wood, etc., can solve the problems of increased difficulty, increased material brittleness, loss of wood volume, etc., and achieves excellent dimensional stability, improved performance, and increased size The effect of stability

Inactive Publication Date: 2015-10-21
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the former, the strength of the wood is significantly enhanced after resin impregnation, but the subsequent heat treatment will cause the resin to fail to a certain extent, the brittleness of the material will increase, and part of the strengthening effect has been destroyed; for the latter, the plasticity of the wood will be significantly reduced after heat treatment. , the difficulty of subsequent enhancement through compression increases significantly, and the compression treatment will not only cause the loss of wood volume to a certain extent, but also have the problem of springback after compression treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] A kind of manufacturing method of enhanced high-temperature heat-treated wood of the present invention, with plantation fast-growing poplar as raw material, comprises the following steps:

[0042] 1) High temperature heat treatment:

[0043]1.1) Primary drying: put poplar wood with an initial moisture content of 12% into a high-temperature heat treatment tank, first rapidly raise the temperature to 100°C, and the heating rate is 15°C / h, so that the surface temperature of the wood is consistent with the internal temperature; then The temperature rises steadily to 130°C, the heating rate is 10°C / h, and the temperature is kept for 5 hours, so that the moisture content of the wood is reduced to about 0;

[0044] 1.2) Insulation heat treatment: the once-dried poplar wood is rapidly heated from 130°C to 180°C, the heating rate is 15°C / h, the holding time is 4h, and the oxygen content is controlled within the range of less than or equal to 2%;

[0045] 1.3) Cooling and humidi...

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PUM

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Abstract

The invention discloses enhanced high-temperature heat treated wood and a manufacturing method thereof. The manufacturing method comprises the following steps that 1, high-temperature heat treatment is performed, wherein man-made forest wood serves as raw materials, and high-temperature heat treatment is performed on the man-made forest wood to obtain heat treated wood; 2, impregnation enhancing treatment is performed, wherein the heat treated wood obtained by the step 1 is impregnated in resin adhesives to obtain impregnated wood; 3, solidification forming treatment is performed, wherein solidification forming treatment is performed on the impregnated wood obtained by the step 2 to obtain the enhanced high-temperature heat treated wood. According to the manufacturing method, not only can the mechanical properties of the wood be improved, but also the size stability of the wood can be improved, green and environmental protection are achieved, and the prepared enhanced high-temperature heat treated wood takes the man-made forest wood as the raw materials and is high in mechanical strength and good in size stability.

Description

technical field [0001] The invention belongs to the category of wood function improvement in the field of wood processing, and in particular relates to an enhanced high-temperature heat-treated wood and a manufacturing method thereof. Background technique [0002] The basic principle of wood heat treatment is to use the temperature condition of 160-260 ℃ to treat wood for a certain period of time, the wood cell wall material will undergo pyrolysis and molecular structure recombination, and the wood components will undergo permanent chemical changes, so that the hygroscopicity of the treated wood will be reduced and the size will be stable. It is suitable for outdoor floors, outdoor decorative wall panels, garden furniture, wooden fences, etc. On the other hand, wood heat treatment will lead to a decrease in the mechanical strength and weight of the wood, which has become its main disadvantage. [0003] The commercial application of wood heat treatment technology mainly start...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/00B27K5/04B27K1/00B27K3/08B27K3/34B27K3/38
CPCB27K1/00B27K3/08B27K3/34B27K3/38B27K5/0085B27K5/04
Inventor 徐康刘元吕建雄李贤军黄荣凤周永东
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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