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Treatment method of impregnated rubber wood

A treatment method, rubber wood technology, applied in wood treatment, impregnated wood, wood treatment details, etc., can solve the problems of decay, long cycle, mildew, etc., and achieve the effect of reducing energy consumption

Inactive Publication Date: 2020-02-21
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high content of starch, sugar and protein in rubber wood, rubber wood is prone to blue stain, mold, moth and decay.
At present, the modification of rubber wood is mainly drug treatment. Water-soluble chemicals are immersed in rubber wood through hot and cold tank cooking and vacuum pressure impregnation. Impact
In addition, there are problems such as long modification treatment and drying cycle, high cost, and unstable modification effect.

Method used

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  • Treatment method of impregnated rubber wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Put the wood to be modified in a dipping tank, heat it to 60°C, vacuumize it to -0.1MPa, and keep it for 20-30min.

[0026] (2) When the temperature of the impregnation tank is lowered to about 25°C under vacuum, the impregnation liquid is injected, and the impregnation liquid completely submerges the wood.

[0027] (3) Pressurize to 1.2MPa, keep it for 5-6 hours, and discharge the impregnation solution.

[0028] (4) Open the impregnation tank, take out the wood and put it into the drying kiln, dry it in stages, dry at 60°C until the moisture content is <30%, dry at 70°C until the moisture content is <20%, dry at 80°C until the moisture content is <15%, 100 °C and dry until the moisture content is less than 10%.

Embodiment 2

[0030] (1) Place the wood to be modified in a dipping tank, heat to 80°C, vacuumize to -0.1MPa, and keep for 20-30min.

[0031] (2) When the temperature of the impregnation tank is lowered to about 20°C under vacuum, the impregnation liquid is injected, and the impregnation liquid completely submerges the wood.

[0032] (3) Pressurize to 1.2MPa, keep it for 5-6 hours, and discharge the impregnation solution.

[0033] (4) Open the impregnation tank, take out the wood and put it into the drying kiln, dry it in stages, dry at 60°C until the moisture content is <30%, dry at 70°C until the moisture content is <20%, dry at 80°C until the moisture content is <15%, 100 °C and dry until the moisture content is less than 10%.

Embodiment 3

[0035] (1) Place the wood to be modified in a dipping tank, heat to 120°C, vacuumize to -0.1MPa, and keep for 20-30min.

[0036] (2) When the temperature of the dipping tank is lowered to 25°C in a vacuum state, inject the dipping liquid, and the dipping liquid will completely submerge the wood.

[0037] (3) Pressurize to 1.2MPa, keep it for 5-6 hours, and discharge the impregnation solution.

[0038] (4) Open the impregnation tank, take out the wood and put it into the drying kiln, dry it in stages, dry at 60°C until the moisture content is <30%, dry at 70°C until the moisture content is <20%, dry at 80°C until the moisture content is <15%, 100 °C and dry until the moisture content is less than 10%.

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Abstract

The invention discloses a treatment method of impregnated rubber wood, which comprises the following steps: putting wood to be modified into an impregnation tank, and vacuumizing at a heating state; cooling to 25 DEG C, injecting an impregnation liquid, pressurizing and maintaining the pressure for 5-6 hours, and discharging the impregnation liquid; and opening the impregnation tank, taking out the wood, putting the wood into a drying kiln, carrying out staged drying treatment, drying at 60 DEG C until the moisture content is less than 30%, drying at 70 DEG C until the moisture content is lessthan 20%, drying at 80 DEG C until the moisture content is less than 15%, and drying at 100 DEG C until the moisture content is less than 10% to obtain the impregnated rubber wood. According to the invention, the rubber wood wet plates can be directly processed; the problems of high energy consumption and high cost due to the fact that dry plates are needed for processing and treatment in conventional rubber wood processing are solved; according to the method, vacuumizing is carried out at heating state, air in the wood can be partially or completely exhausted, then cooling is conducted, theremaining air in the wood is compressed to generate a vacuum state, chemicals enter the wood by means of the pressure difference during pressurization, the impregnation effect is improved, the formaldehyde content of the impregnation liquid is low, and the method is environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of wood processing and production, in particular to a treatment method for impregnated rubber wood and the impregnated rubber wood prepared by the treatment method. Background technique [0002] Rubber trees (Hevea brasiliensis) are widely planted in southern my country and Southeast Asia. The effective rubber production period of rubber trees is about 30 years. More than 10 million cubic meters of rubber wood. Rubberwood is a diffuse-porous wood, easy to process and beautiful in texture. It is currently widely used to make wood products such as furniture, glulam finger-joint boards, toys, etc. It is an important commercial forest plantation material. However, due to the high content of starch, sugar and protein in rubber wood, rubber wood is prone to blue stain, mold, moth and decay. At present, the modification of rubber wood is mainly drug treatment. Water-soluble chemicals are immersed in rubber wood th...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K3/10B27K3/52B27K5/04
CPCB27K3/0207B27K3/08B27K3/10B27K3/52B27K5/04
Inventor 柴宇博平立娟孙柏玲刘君良吕文华倪林胡极航王小青
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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