Impregnation densified veneer enhanced laminated veneer lumber and a manufacturing method thereof

A technology of laminated veneer lumber and manufacturing methods, applied in the direction of impregnated wood, manufacturing tools, wood impregnation, etc., to achieve the effects of protecting the ecological environment, saving resources and harvesting, and good dimensional stability

Active Publication Date: 2011-09-14
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes an impregnated compressed veneer reinforced laminated veneer lumber and its manufacturing method. According to the requirements of laminate

Method used

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  • Impregnation densified veneer enhanced laminated veneer lumber and a manufacturing method thereof
  • Impregnation densified veneer enhanced laminated veneer lumber and a manufacturing method thereof
  • Impregnation densified veneer enhanced laminated veneer lumber and a manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The fast-growing poplar section is rotary-cut by a rotary cutter to obtain a veneer with a thickness of 2.0-4.0mm, and dried to a moisture content of 6%-10%;

[0029] Take a part of the poplar veneer with a thickness of 4.0mm and put it into the impregnating phenolic resin glue with a weight concentration of 15% for 30 minutes, take it out and dry it to a moisture content of 10%;

[0030] Then put the impregnated veneer into a hot plate hot press for high temperature compression, the temperature of the hot plate is 150°C, the compression time is 5.0min, the compression rate of the veneer is 50%, take it out and cool it to room temperature;

[0031] The veneer is coated with phenolic resin glue, and the amount of glue on one side is 150g / m2 2 ;

[0032] Glue-coated veneers are artificially assembled. The number of slab layers is 10. The method of assembly is that the upper and lower surfaces of the slab are each a layer of impregnated and compressed veneer, and the midd...

Embodiment 2

[0036] The fast-growing poplar section is rotary-cut by a rotary cutter to obtain a veneer with a thickness of 2.0-4.0mm, and dried to a moisture content of 6%-10%;

[0037] Take a part of the 2.0mm poplar veneer and put it into the impregnation phenolic resin glue with a weight concentration of 25% for 60 minutes, take it out and dry it to a moisture content of 10%;

[0038] The unimpregnated veneer is coated with phenolic resin glue, and the amount of glue on one side is 150g / m2 2 ;

[0039] Glue-coated veneers are artificially assembled. The number of slab layers is 15. The method of assembly is that the upper and lower sides of the slab are 2 layers of phenolic glue impregnated veneers, and the middle 11 layers are poplar veneers with a thickness of 4.0mm; all veneers The slabs are assembled along the grain, and the formed slabs are aged at room temperature for 45mim;

[0040] Then send it into a hot press for hot pressing, the hot pressing temperature is 180°C, the hot ...

Embodiment 3

[0042] The fast-growing poplar section is rotary-cut by a rotary cutter to obtain a veneer with a thickness of 2.0-4.0mm, and dried to a moisture content of 6%-10%;

[0043] Take a part of 4.0mm poplar veneer and put it into urea-formaldehyde resin glue with a weight concentration of 30% for 90 minutes, take it out and dry it until the water content is 10%;

[0044] Then put the impregnated veneer into a flat plate hot press for high temperature compression, the temperature of the hot plate is 130°C, the compression time is 1.0min, the compression rate of the veneer is 30%, take it out and cool it to room temperature;

[0045] Take a part of the 2.0mm poplar veneer and put it into the impregnation phenolic resin glue with a weight concentration of 25% for 60 minutes, take it out and dry it to a moisture content of 10%;

[0046] Apply phenolic resin glue to the undipped veneer, and the amount of glue on one side is 220g / m 2 ;

[0047] Glue-coated veneer is artificially assemb...

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Abstract

The invention relates to an impregnation densified veneer enhanced laminated veneer lumber and a manufacturing method of the impregnation densified veneer enhanced laminated veneer lumber, the impregnation densified veneer enhanced laminated veneer lumber structurally consists of an impregnation veneer or/and an impregnation densified veneer and a wood veneer, wherein the impregnation veneer or the impregnation densified veneer is used as the surface layer and the subsurface layer of a laminated veneer lumber plate blank or all layers of the plate blank and is used for increasing the modulus of elasticity and the static bending strength of the laminated veneer lumber. The impregnation densified veneer enhanced laminated veneer lumber has the advantages that: a thick veneer made of fast-growing wood is adopted as raw material to manufacture the impregnation densified veneer enhanced laminated veneer lumber, the intension is high, the dimensional stability is good, the physical mechanical property can meet the requirement of structural laminated veneer lumber standard in China, the impregnation densified veneer enhanced laminated veneer lumber can totally replace high-quality solid wood converted timber and can be used in a constructional engineering structure and used as a high class cement concrete framework, heavy electro machinery packing material and the like. The fast-growing wood is utilized effectively and comprehensively, nature timber resources are saved, the ecological environment is protected, the additional value of a product is increased, and the supply and demand contradiction to major diameter class nature timber in domestic market is remitted.

Description

technical field [0001] The invention relates to an impregnated compressed veneer reinforced veneer laminated lumber and a manufacturing method, which uses fast-growing species of wood as a raw material, and belongs to the technical field of artificial board and composite material manufacturing technology. Background technique [0002] Currently, in the field of construction, wood materials are widely used, especially engineered wood composite materials, such as in building joists, roof trusses, I-beam members, structural framing and flooring systems. With the rapid development of the national economy, especially with the promotion and development of wooden structure buildings, the contradiction between supply and demand of wooden structural materials has become increasingly prominent. There is a serious shortage of large-diameter natural forest timber resources in China, but my country's fast-growing forest timber resources are abundant. Using fast-growing wood to manufactu...

Claims

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Application Information

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IPC IPC(8): B27D1/04B27N3/12B27K3/00B32B21/13B32B21/14
Inventor 梅长彤周定国周晓燕张洋徐信武潘明珠崔举庆
Owner NANJING FORESTRY UNIV
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