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Processing method for improving performances of cryptomeria fortune wood

A processing method and technology of wood, applied in wood processing equipment, impregnated wood, wood impregnation, etc., can solve the problems of affecting the wood yield rate of wood products, unfavorable cedar wood processing, and affecting the scope of utilization, etc., to expand the scope of use , Improve the effect of dimensional stability and structural stability

Inactive Publication Date: 2017-12-01
FUNAN XINGGUANG ARTS & CRAFTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As a low-carbon material, wood is widely used in construction, furniture and other industries. However, my country's forest resources are not very rich. In order to alleviate the contradiction between wood supply and demand, it is urgent to develop the utilization of non-traditional timber species resources. Among them, cedar is widely distributed. Fast growth, long life, wide application, straight trunk, light and soft material, low density, obvious difference between heart and sapwood, white sapwood, red core, and obvious difference in moisture content of heart and sapwood. Poor permeability. At the same time, the comprehensive strength of cedar wood is low. The compressive strength along the grain, flexural strength, flexural modulus of elasticity, and impact toughness are classified according to the 5-grade grading standard of each performance, which are all low-level. These shortcomings are not conducive to cedar. The processing of wood affects its utilization range. The mechanical processing method of wood directly affects the yield rate of wood and the quality of wood products. Therefore, how to process wood has become a subject that needs continuous research.

Method used

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  • Processing method for improving performances of cryptomeria fortune wood

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Comparison scheme
Effect test

Embodiment 1

[0014] A processing method for improving properties of cedar wood, comprising the following contents:

[0015] (1) Cutting and sawing to get the board, coating the end with asphalt paint for sealing treatment, and controlling the moisture content to 35%;

[0016] (2) Mix the modified chitosan aqueous solution with a mass concentration of 3% and the silver nitrate solution with a mass concentration of 40% at a volume ratio of 80:1, and magnetically stir for 2 hours at a temperature of 70°C to obtain a mixed sol , and then dialysis and freeze-drying to obtain dry powder of sol;

[0017] (3) Put the board after the above treatment into an airtight container, use sol dry powder as the treatment agent, and pass through a carbon dioxide fluid medium at a temperature of 200°C. The flow rate of the carbon dioxide fluid medium is 2.6L / min, and the amount of sol dry powder added is 10g / min, so that the pressure in the airtight container is 30MPa, and the processing time is 250min;

[...

Embodiment 2

[0022] A processing method for improving properties of cedar wood, comprising the following contents:

[0023] (1) Cutting and sawing to get the board, coating the end with asphalt paint for sealing treatment, and controlling the moisture content to 30%;

[0024] (2) Mix the modified chitosan aqueous solution with a mass concentration of 2% and the silver nitrate solution with a mass concentration of 45% at a volume ratio of 85:1, and magnetically stir for 2.5 hours at a temperature of 80°C to obtain a mixed sol , and then dialysis and freeze-drying to obtain dry powder of sol;

[0025] (3) Put the board after the above treatment into an airtight container, use dry sol powder as the treatment agent, and pass through a carbon dioxide fluid medium at a temperature of 220°C. The flow rate of the carbon dioxide fluid medium is 2.4L / min, and the amount of dry sol powder added is 12g / min, so that the pressure in the airtight container is 35MPa, and the processing time is 280min;

...

Embodiment 3

[0030] A processing method for improving properties of cedar wood, comprising the following contents:

[0031] (1) Cutting and sawing to get the board, coating the end with asphalt paint for sealing treatment, and controlling the moisture content to 40%;

[0032] (2) Mix the modified chitosan aqueous solution with a mass concentration of 4% and the silver nitrate solution with a mass concentration of 35% in a volume ratio of 75:1, and magnetically stir for 1.5 hours at a temperature of 60°C to obtain a mixed sol , and then dialysis and freeze-drying to obtain dry powder of sol;

[0033] (3) Put the board after the above treatment into an airtight container, use sol dry powder as the treatment agent, pass through the carbon dioxide fluid medium with a temperature of 180 °C, the flow rate of the carbon dioxide fluid medium is 2.8L / min, and the addition amount of the sol dry powder is 8g / min, so that the pressure in the airtight container is 25MPa, and the processing time is 220...

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Abstract

The invention belongs to the technical field of cedar wood processing, and in particular relates to a processing method for improving the properties of cedar wood, which comprises several steps of plate pretreatment, sol dry powder preparation, plate treatment and hot-press forming. Compared with the prior art, the present invention has the following advantages: in the present invention, the board is first controlled to a certain water content, and then the dry powder of the sol is brought into the capillary system and the pit system of the board by using high-temperature carbon dioxide, so as to improve the hardness of the board and at the same time improve the hardness of the board. Antibacterial and anti-corrosion properties, the sol dry powder forms regular nanoparticles in the board, which is uniformly dispersed, not easy to agglomerate, and has a stable structure, which effectively improves the dimensional stability of the board. At the same time, the nail-holding force of the board will not decrease, and the processing process is simple. The dry quality of fir improves the compactness of the board and effectively expands the scope of use of the product.

Description

technical field [0001] The invention belongs to the technical field of cedar wood processing, and in particular relates to a processing method for improving the properties of cedar wood. Background technique [0002] As a low-carbon material, wood is widely used in construction, furniture and other industries. However, my country's forest resources are not very rich. In order to alleviate the contradiction between wood supply and demand, it is urgent to develop the utilization of non-traditional timber species resources. Among them, cedar is widely distributed. Fast growth, long life, wide application, straight trunk, light and soft material, low density, obvious difference between heart and sapwood, white sapwood, red core, and obvious difference in moisture content of heart and sapwood. Poor permeability. At the same time, the comprehensive strength of cedar wood is low. The compressive strength along the grain, flexural strength, flexural modulus of elasticity, and impact t...

Claims

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Application Information

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IPC IPC(8): B27K3/10B27K3/52
CPCB27K3/10B27K3/52
Inventor 陈献军陈子玉
Owner FUNAN XINGGUANG ARTS & CRAFTS CO LTD
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