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A defatting method of neutral pine

A pine, neutral technology, applied in pressure impregnation and other directions, can solve the problems of great variation in the permeability of the degreasing solution, it is difficult to accurately reflect the permeability characteristics of the degreasing solution of large-sized specimens, and difficult, and achieves a small decrease in physical and mechanical properties. The effect of low production cost and convenient operation

Inactive Publication Date: 2009-06-17
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Secondly, because it is difficult to measure the degreasing fluid permeability coefficient of large-sized specimens in practice, and the current research on degreasing penetration is based on laboratory-scale small-sized specimens, and the variation of degreasing fluid permeability is extremely large. The degreasing fluid permeability of large-sized specimens has certain limitations in practical applications, and it is difficult to accurately reflect the actual degreasing fluid permeability characteristics of large-sized specimens

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of degreasing solution: mix ethanol and benzene according to the volume ratio of 1:1 to obtain a mixed solvent, and then dilute the mixed solvent with water according to the volume ratio of 1:99 to prepare a degreasing solution;

[0021] (2) Canning: According to the volume of pine wood / volume of degreasing liquid at 1:1, put the degreasing liquid and larch board into a high-pressure degreasing tank (required to withstand the pressure of 3MPa);

[0022] (3) Degreasing treatment: heat up to 110°C at the fastest speed, keep it warm for 8 hours, make the degreasing depth reach 5-6cm, and keep the color of fresh pine wood; then cool to 50°C, discharge the liquid, and recover the rosin; drain the liquid Finally, open the degreasing tank and unload the pine wood. After degreasing, the degreasing rate reaches more than 80%, the color presents the color of fresh material, and the change of physical and mechanical properties does not exceed 8%.

Embodiment 2

[0024] (1), preparation of degreasing liquid: mix ethanol and benzene according to the volume ratio of 9:1 to obtain a mixed solvent, then dilute the mixed solvent with water according to the volume ratio of 1:9 to prepare a degreasing liquid;

[0025] (2), canning: According to the volume of pine wood / volume of degreasing liquid is 1:10, put the degreasing liquid and masson pine plate into high-pressure degreasing tank (required to withstand the pressure of 3MPa);

[0026] (3) Degreasing treatment: heat up to 160°C at the fastest speed, keep warm for 4 hours, make the degreasing depth reach 5-6cm, and keep the color of fresh pine wood; then cool to 80°C, discharge the liquid, and recover the rosin; After the liquid, open the skim tank and unload the pine. After degreasing, the degreasing rate reaches more than 80%, the color presents the color of fresh material, and the change of physical and mechanical properties does not exceed 8%.

Embodiment 3

[0028] (1), preparation of degreasing liquid: mix ethanol and benzene according to the volume ratio of 3:1 to obtain a mixed solvent, and then dilute the mixed solvent with water according to the volume ratio of 1:66 to prepare a degreasing liquid;

[0029] (2), canning: according to the volume of pine wood / volume of degreasing liquid is 1:0.5, put the degreasing liquid and slash pine plate into high-pressure degreasing tank (required to withstand the pressure of 3MPa);

[0030] (3) Degreasing treatment: heat up to 140°C at the fastest speed, keep warm for 6 hours, make the degreasing depth reach 5-6cm, and keep the color of fresh pine wood; then cool to 60°C, discharge the liquid, and recover the rosin; After the liquid, open the skim tank and unload the pine. After degreasing, the degreasing rate reaches more than 80%, the color presents the color of fresh material, and the change of physical and mechanical properties does not exceed 8%.

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Abstract

The invention discloses a neutral pine degreasing method. The invention comprises the following steps that: (1) degreasing fluid is dispensed; (2) the degreasing fluid is canned; (3) the degreasing processing is performed. The invention enables the pine degreasing depth to reach 5 to 6 cm, the fresh wood color of the pine is kept, the decline of the physical mechanical properties is smaller, and the requirements of the furniture can be completely satisfied. The invention is easy to realize, the operation is convenient, the production cost is low, thereby being more important, the utilization of the technology does not produce waste water, the added value of the pipe is enhanced, and more employment posts are created, and the invention is advantageous in the promotion of the harmonious development of artificial forest resources and the ecology and the society.

Description

technical field [0001] The invention relates to a neutral degreasing method for pine wood, in particular to a method for removing rosin in pine wood with a neutral organic mixed solution. Background technique [0002] At present, the degreasing methods of various pine woods are slightly different due to their different material properties, rosin content and inclusions, but the current pine wood degreasing methods and technologies can be summarized into five types: (1) lye saponification method, (2) solvent Extraction method, (3) catalytic polymerization method, (4) high temperature drying method, (5) vacuum drying method. [0003] Generally, in order to improve the degreasing effect, two or more degreasing methods are often combined, but the manufacturers are not ideal in practical applications. For example, the pine wood processed by lye saponification has low degreasing rate, easy to change color, dull luster, and the problem of waste water has not been fundamentally solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/08
Inventor 刘元彭万喜吴义强李贤军
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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