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Method for improving dimensional stabilization of wood

A dimensionally stable and dimensionally stable technology, applied in the direction of wood impregnation, impregnated wood, wood processing equipment, etc., can solve problems that are difficult for consumers to accept, health hazards, unstable wood dimensions, etc., and achieve moisture content reduction and uniform heating , The effect of increasing the mechanical strength

Inactive Publication Date: 2015-11-25
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the above methods cannot fundamentally solve the problem of unstable wood dimensions, and some introduce chemical modifiers in the chemical modification process, which will bring certain harm to the environment and people's health, and are difficult to be accepted by consumers.

Method used

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  • Method for improving dimensional stabilization of wood
  • Method for improving dimensional stabilization of wood
  • Method for improving dimensional stabilization of wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Below take red birch as test material, microcrystalline wax (fusing point is 95 ℃) as wax injection reagent to illustrate (except microcrystalline wax, other paraffin wax, mixed crystal wax all can be used as wax injection reagent) working process of the present invention.

[0057] 1) Plate palletizing

[0058] Get sawing and grow 4000mm, wide 300mm, the red birch plank of thick 100mm is stacked according to any kind of timber stacking form disclosed in the field of timber drying. Use spacers with a thickness of 30mm and a width of 30mm to stack the wood. The distance between the spacers and the two end faces in the length direction of the board is 50mm; between the same spacer layer, the distance between two adjacent spacers is 450mm.

[0059] In the embodiment of the present invention, a spacer with a thickness of 30 mm and a width of 30 mm is used as an example for illustration. Spacers with other dimensions of 30 ± 5 mm in thickness and 30 ± 5 mm in width are also ...

Embodiment 2

[0066] Except that soaking treatment time is 8h in step 2-2), and dewaxing treatment time is 2h, all the other are identical with embodiment 1.

Embodiment 3

[0068] In addition to choosing basswood air-dried board as the wood, the melting point of microcrystalline wax is 100°C; the immersion temperature during wax injection soaking treatment is 125°C, and the soaking treatment time is 4 hours; the holding temperature during dewaxing treatment is 125°C, and the dewaxing time Be except 2h, all the other are identical with embodiment 1.

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Abstract

The invention discloses a method for improving the dimensional stabilization of wood. The method comprises the steps of soaking wood in petroleum wax, carrying out soaking process on the wood and making wood absorbing petroleum wax to obtain wood with good dimensional stabilization. According to the method, wax injection process is carried out on the wood in the normal pressure condition, and the petroleum wax is injected into the wood on the premise without damaging performance of the wood. Thus, redundant moisture in the wood can be drained out. Meanwhile, pipe holes of the wood and gaps between cells can be sealed, and the purpose of improving the dimensional stabilization of the wood is achieved. Furthermore, the method is simple in equipment, convenient to operate, controllable in processing condition and suitable for processing various kinds of wood.

Description

technical field [0001] The invention relates to a wood treatment method, in particular to a method for improving the dimensional stability of wood. Background technique [0002] Wood is mainly composed of cellulose, hemicellulose and lignin. There are a large number of hydroxyl groups on the cellulose and hemicellulose molecules, so that the moisture inside the wood will change with the change of ambient temperature and humidity, and the moisture inside the wood will change. In the process of desorption or moisture absorption, the wood will shrink and swell, making the wood swell and shrink unevenly with the change of wood moisture content in all directions, and it is easy to produce warping, deformation, cracking and other defects, which restricts the application range of wood. Therefore, improving the dimensional stability of wood is of great significance to the efficient utilization of wood. [0003] In order to improve the dimensional stability of wood, many scholars ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K3/34
Inventor 关健何正斌吕欢赵紫剑伊松林彭毅卿
Owner BEIJING FORESTRY UNIVERSITY
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