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Poplar single ply intensifier and its usage in intensifying poplar single ply

A technology of poplar veneer and strengthening agent, which is applied in the direction of humidity control wood, impregnated wood, wood impregnation, etc., can solve the problems of loose structure, low strength, soft poplar material, etc., with simple method, simple proportion, The effect of low equipment requirements

Inactive Publication Date: 2007-08-22
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a poplar veneer strengthening agent and a method for strengthening poplar veneer in order to solve the shortcomings of poplar wood such as soft material, loose structure and low strength and to alleviate the current situation of wood supply shortage

Method used

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  • Poplar single ply intensifier and its usage in intensifying poplar single ply
  • Poplar single ply intensifier and its usage in intensifying poplar single ply
  • Poplar single ply intensifier and its usage in intensifying poplar single ply

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specific Embodiment approach 1

[0007] Specific implementation mode 1: The poplar veneer strengthening agent in this embodiment consists of 24-26 parts of styrene, 48-52 parts of methyl methacrylate, 24-26 parts of vinyl acetate, 2.8-3.2 parts of even It is made of nitrogen diisobutyronitrile, 1.8-2.2 parts of cobalt naphthenate and 5.8-6.2 parts of zinc chloride.

[0008] In this embodiment, azobisisobutyronitrile (AIBN) is used as an initiator. Azobisisobutyronitrile is easily decomposed into a free radical compound, which is violently decomposed in an environment of 80-90°C, and the reaction speed is accelerated. The decomposition reaction is as follows Show: . The decomposition of azobisisobutyronitrile is characterized by almost all first-order reactions, only one free radical is formed, and there is no induced decomposition. In the presence of unsaturated vinyl monomers (styrene, methyl methacrylate and vinyl acetate) Polymerization is initiated under existing conditions, so azobisisobutyronitrile ...

specific Embodiment approach 2

[0014] Specific embodiment two: The difference between this embodiment and specific embodiment one is: the poplar veneer strengthening agent is composed of 25 parts of styrene, 50 parts of methyl methacrylate, 25 parts of vinyl acetate, 3 Parts azobisisobutyronitrile, 2 parts cobalt naphthenate and 6 parts zinc chloride.

specific Embodiment approach 3

[0015] Specific embodiment three: the method for strengthening poplar veneer in this embodiment is carried out according to the following steps: (1) 24~26 parts of styrene, 48~52 parts of methyl methacrylate, 24~26 parts of vinyl acetate, 2.8 ~3.2 parts of azobisisobutyronitrile, 1.8~2.2 parts of cobalt naphthenate and 5.8~6.2 parts of zinc chloride are evenly stirred together to make a poplar veneer strengthening agent; (2) Immerse the poplar veneer in the reinforcement (3) Apply a pressure of 0.38-0.45MPa to the poplar veneer in the pressure tank immersed in the strengthening agent for 60±2min, and then seal it under normal pressure for 2±0.1h; ( 4) Take out the poplar veneer to absorb the strengthening agent on the surface, then wrap it with polyethylene film and let it stand for 36±1h; Heating in medium temperature for 6±0.1h, and then drying in a vacuum oven at 20±0.1°C for 2-3h to obtain strengthened poplar veneer.

[0016] This embodiment refers to the national standar...

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Abstract

The present invention is poplar single ply intensifier and the method of intensifying poplar single ply therewith. The poplar single ply intensifier is prepared with styrene 24-26 weight portions, methyl methacrylate 48-52 weight portions, vinyl acetate 24-26 weight portions, 2azo diisobutyronitrile 2.8-3 weight portions, cobalt naphthenate 1.8-2.2 weight portions and zinc chloride 5.8-6.2 weight portions. The method of intensifying poplar single ply with the intensifier includes the following steps: preparing the intensifier, soaking poplar single ply inside the intensifier, sealing and pressurizing, ageing, and heating before drying. The present invention can raise the surface hardness of poplar single ply by 1.34-2.55 times, wear resistance by 2.35 times and static bending strength by 1.87-2.96 times.

Description

technical field [0001] The invention relates to a wood strengthening agent and a method for strengthening wood. Background technique [0002] With the steady development of my country's economy, the demand for wood consumption in industrial production and people's life continues to increase, but my country's current wood production cannot meet the demand in terms of quality and quantity. Over the past ten years, my country has built a large number of planted forests every year, and the cumulative area of ​​planted forests is 34 million hectares, ranking first in the world. Poplar has become one of the most important fast-growing plantation tree species in my country due to its wide distribution, many varieties, fast growth and strong adaptability. According to statistics, the total area of ​​poplar plantations in my country has reached more than 7 million hectares, ranking first in the world. First, the area of ​​poplar plantations exceeds the sum of the area of ​​poplar pla...

Claims

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Application Information

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IPC IPC(8): B27K3/50B27K3/08B27K1/00
Inventor 王逢瑚陈广胜孙建平马立军
Owner NORTHEAST FORESTRY UNIVERSITY
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