Method for compressing and densifying fast-growing cunninghamia lanceolata

A technology of densification and fir wood, which is applied in the direction of wood compression, wood treatment, impregnation of wood, etc., can solve the problems of easy deformation recovery, low compression rate, and low dimensional stability, and achieve dimensional stability, high compression rate, and relief of wood The effect of undersupply

Inactive Publication Date: 2020-10-02
GUANGXI UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0005] In order to overcome the problems of low compression rate, low dimensional stability and easy deformation and recovery of fast-growing wood in the prior art, the

Method used

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  • Method for compressing and densifying fast-growing cunninghamia lanceolata

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Embodiment 1

[0024] Present embodiment is an example of the method for fast-growing Chinese fir compression compaction of the present invention, comprises the following steps:

[0025] (1) processing of Chinese fir wood, processing the sapwood of Chinese fir wood into a wood block sample with a size of 20*20*20mm;

[0026] (2) Preparation of fir compression and densification pretreatment solution, configure a pretreatment solution of 2.5mol / L sodium hydroxide and 0.4mol / L sodium sulfite, stir evenly, and boil;

[0027] (3) Pretreatment of fir compression and densification, placing the fir block sample in a boiling pretreatment solution at 100°C for 4 hours, and then in boiling deionized water several times to remove chemical substances;

[0028] (4) balance the moisture content of the wood before pressing, and control the moisture content of 60% of the fir block sample after the pretreatment;

[0029] (5) Compression and densification of Chinese fir wood, place the wood block sample with ...

Embodiment 2

[0032] The present embodiment is another example of the method for fast-growing fir compression and compaction of the present invention, comprising the following steps:

[0033] (2) processing of Chinese fir wood, processing the sapwood of Chinese fir wood into a wood block sample with a size of 20*20*20mm;

[0034] (2) Preparation of fir compression and densification pretreatment solution, configure a pretreatment solution of 2.5mol / L sodium hydroxide and 0.4mol / L sodium sulfite, stir evenly, and boil;

[0035] (3) Pretreatment of fir compression and densification, place the fir block sample in a boiling pretreatment solution at 100°C for 8 hours, and then in boiling deionized water several times to remove chemical substances;

[0036] (4) balance the moisture content of the wood before pressing, and control the moisture content of 60% of the fir block sample after the pretreatment;

[0037] (5) Compression and densification of Chinese fir wood, place the wood block sample w...

Embodiment 3

[0040] Present embodiment is another example of the method for fast-growing Chinese fir compression and densification described in the present invention, comprises the following steps:

[0041] (3) processing of Chinese fir wood, processing the sapwood of Chinese fir wood into a wood block sample with a size of 20*20*20mm;

[0042] (2) Preparation of fir compression and densification pretreatment solution, configure a pretreatment solution of 2.5mol / L sodium hydroxide and 0.4mol / L sodium sulfite, stir evenly, and boil;

[0043] (3) Pretreatment of fir compression and densification, placing the fir block sample in a boiling pretreatment solution at 100°C for 12 hours, and then soaking it in boiling deionized water several times to remove chemical substances;

[0044] (4) balance the moisture content of the wood before pressing, and control the moisture content of 60% of the fir block sample after the pretreatment;

[0045](5) Compression and densification of Chinese fir wood, ...

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Abstract

The invention discloses a method for compressing and densifying fast-growing cunninghamia lanceolata, which relates to the technical field of wood processing treatment and comprises the following steps of: (1) processing cunninghamia lanceolata wood; (2) preparing a cunninghamia lanceolata compression and densification pretreatment pre-solution; (3) carrying out compression and densification pretreatment on cunninghamia lanceolata; (4) balancing the moisture content of the wood before pressing; (5) compressing and densifying the cunninghamia lanceolata wood; and (6) carrying out later-stage thermal fixation. The cunninghamia lanceolata compression and densification method provided by the invention is simple in process and equipment, short in required time and relatively low in production cost. The density, the hardness and the elasticity modulus of the obtained compressed and densified cedarwood are increased compared with those of bare cunninghamia lanceolata and compressed and densified cunninghamia lanceolata which is not pretreated, and the moisture absorption recovery rate and the water absorption recovery rate are small.

Description

technical field [0001] The invention relates to the technical field of modification and processing of fast-growing Chinese fir, in particular to a method for compressing and densifying fast-growing Chinese fir. Background technique [0002] Wood is the only renewable structural material among the four major building materials (cement, steel, plastic, and wood) in the world today, and it is widely used in construction, furniture manufacturing, pulp and paper and other industries. Compared with steel and alloy materials, wood has the advantages of light weight, less damage to the environment, environmental protection and recyclability; compared with some polymers and biomimetic composite materials, it has the advantages of simple manufacturing process and low cost. In recent years, as some non-renewable natural resources (petroleum, metal, etc.) are decreasing, the advantages of wood materials as renewable resources are becoming more and more obvious. [0003] my country is a...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/16B27K3/20B27K5/00B27M1/02G01N1/28G01N1/44
CPCB27K3/025B27K3/16B27K3/20B27K5/0085B27M1/02G01N1/28G01N1/286G01N1/44
Inventor 孙建平宋丽琴程芳超秦志永
Owner GUANGXI UNIV
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