Microwave treatment reconstructed material and preparing methods thereof

A technology of microwave treatment and recombined wood, which is applied in the direction of radiation/wave wood treatment, wood treatment, wood treatment details, etc., can solve the problems of poor resin distribution, high pressurization pressure, and long impregnation time, etc., to achieve uniform density and reduce Low processing cost and good dimensional stability

Inactive Publication Date: 2016-09-28
RES INST OF FORESTRY NEW TECH CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above resin-impregnated wood is impregnated by high pressure, which has problems such as high pressure, long impregnation time, poor resin distribution, high production cost and low efficiency.

Method used

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  • Microwave treatment reconstructed material and preparing methods thereof
  • Microwave treatment reconstructed material and preparing methods thereof
  • Microwave treatment reconstructed material and preparing methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, the microwave-treated recombined material is prepared by using 500 mm (length) × 100 mm (width) × 30 mm (thick) sylvestris sylvestris string cutting board, and the specific steps are as follows:

[0038] (1) by natural drying (air-drying shed of Chinese Academy of Forestry Sciences) or kiln drying (drying temperature 60-80 ℃), the moisture content of Pinus sylvestris lumber is controlled at 30-40%;

[0039] (2) Use continuous tunnel microwave processing equipment (Nanjing Sanle Microwave Technology Development Co., Ltd., model WX100L, the same below) to treat wood with microwaves. The length of the tunnel resonant cavity is 1m, and the cross-sectional size of the tunnel resonant cavity is 0.3m. ×0.25m, the processing parameters are: microwave frequency 915MHz, microwave source power 100kW, microwave volume power 1333kW / m 3 , the processing time is 120s;

[0040] (3) Place the wood (10-25% water content after treatment) and low-molecular-weight urea-...

Embodiment 2

[0045] In this embodiment, the microwave-processed recombined material is prepared by using a 480 mm (length) × 90 mm (width) × 30 mm (thick) sylvestris sylvestris sylvestris string cutting board with a size of 480 mm (length) × 90 mm (width) × 30 mm (thickness).

[0046] (1) by natural drying (air-drying shed of Chinese Academy of Forestry Sciences) or kiln drying (drying temperature 60-80 ℃), the moisture content of Pinus sylvestris lumber is controlled at 30-40%;

[0047] (2) Continuous tunnel microwave treatment equipment is used to treat wood with microwaves. The length of the tunnel resonant cavity is 1m, the cross-sectional size of the tunnel resonant cavity is 0.3m×0.25m, and the processing parameters are: microwave frequency 915MHz, microwave source power 300kW, Microwave volumetric power is 4000kW / m 3 , the processing time is 120s;

[0048] (3) Place the wood treated by microwave in step (2) (the moisture content after treatment is 10-25%) and the soybean adhesive i...

Embodiment 3

[0054] In this embodiment, the microwave-treated recombined wood is prepared by using fir string-cut plates with a size of 500mm (length) × 80mm (width) × 25mm (thickness), and the specific steps are as follows:

[0055] (1) by natural drying (air-drying shed of Chinese Academy of Forestry Sciences), the moisture content of Chinese fir and pine wood is controlled at 30%;

[0056] (2) Continuous tunnel microwave treatment equipment is used to treat wood with microwaves. The length of the tunnel resonant cavity is 1m, the cross-sectional size of the tunnel resonant cavity is 0.3m×0.25m, and the processing parameters are: microwave frequency 915MHz, power 100kW, microwave volume The power is 1333kW / m 3 , the processing time is 120s;

[0057] (3) heat-press the wood processed by microwave in step (2) on a hot-pressing machine, the hot-pressing pressure is 25-50MPa, the hot-pressing temperature is 160-300°C, the hot-pressing time is 15min, and the compression ratio is 50%. Natura...

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Abstract

The invention discloses a microwave treatment reconstructed material and preparing methods thereof. A raw material of the microwave treatment reconstructed material comprises sawn timber. The microwave treatment reconstructed material is obtained through the sawn timber via the preparing method 1 or the preparing method 2. According to the preparing method 1, the sawn timber is subjected to high-strength microwave treatment firstly, and then direct hot press is conducted. According to the preparing method 2, the sawn timber is subjected to high-strength microwave treatment firstly, then the sawn timber is immersed in a resin-based bonding agent or a biology-based bonding agent, and then the microwave treatment reconstructed material is formed through hot press or cold press. According to the microwave treatment reconstructed material and the preparing methods thereof, the problems that the density of the timber is not even, the mechanical performance is not high, the size stability of the immersed reconstructed material is poor, the immersing depth is not enough, and uniformity is poor are solved. The microwave treatment reconstructed material prepared through the methods can be used in the furniture field, the indoor decoration field and the wood structure building field.

Description

technical field [0001] The invention relates to the field of wood processing, in particular to a microwave-treated heavy wood and a preparation method thereof. The microwave-treated heavy wood prepared by the method can be used in the fields of furniture, interior decoration and wood structure construction. Background technique [0002] Wood permeability is one of the important physical properties of wood, and improving the permeability is beneficial to the efficient processing and utilization of wood. A lot of research has been done on improving the permeability of wood at home and abroad. The traditional methods for improving the permeability of wood include three types: chemical method, biological method and physical method: 1) chemical method uses chemical agents to replace the extracted substances in the pit membrane Or degrade the pit membrane, expand the opening between the plug edges of the pit membrane, expand the cell flow channel, thereby improving the permeabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/00B27K3/08B27D1/08
CPCB27K5/0065B27D1/08B27K3/08
Inventor 林兰英傅峰周永东徐恩光
Owner RES INST OF FORESTRY NEW TECH CHINESE ACAD OF FORESTRY
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