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Method for improving bonding performance of reconstituted bamboo

A technology for bamboo recombination and performance, applied in the directions of wood treatment, impregnated wood, wood impregnation, etc., can solve problems such as unsatisfactory damage degree of bamboo green, and achieve the effects of improving physical and mechanical strength, improving bamboo bonding performance and simple operation.

Active Publication Date: 2018-06-15
GUANGDONG ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the unsatisfactory shortcomings and deficiencies of the prior art to the unsatisfactory destructiveness of bamboo green on the surface of bamboo, the purpose of the present invention is to provide a method for improving the gluing performance of bamboo heavy wood

Method used

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  • Method for improving bonding performance of reconstituted bamboo
  • Method for improving bonding performance of reconstituted bamboo
  • Method for improving bonding performance of reconstituted bamboo

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Choose the bamboo slices of hemp bamboo, and use a debulking machine to decompose into bamboo bundle units, and the diameter of the bamboo bundle is 6 to 10 cm; Put it into a carbonization tank for carbonization treatment, the carbonization treatment pressure is 0.35MPa, and the time is 120min. After the treatment, the bamboo bundles are dried to a moisture content of 5%. It is then immersed in the phenolic resin solution, and then the molar ratio of phenol in the phenolic resin: formaldehyde: NaOH is 1: 2.1: 0.1; the molecular weight distribution of the phenolic resin accounts for 96% between 200 and 400, The solid content is 20%, the dipping time is 15min, and the dipping amount is 15% of the mass fraction of bamboo bundles; the bamboo bundles after dipping are placed in a mesh belt dryer, and dried to a moisture content of 12%, and the drying temperature is 70 ℃; after the final bamboo bundles are assembled according to the grain, they are placed in a press and press...

Embodiment 2

[0034] Choose powder single bamboo bamboo slices, and use a debonding machine to decompose into loose bundle units that are long, interlinked and keep the original arrangement of fibers. The diameter of the bamboo bundles is 5-8cm; 5% NaOH was used to treat the bamboo bundles, and the consumption was 20%. The treated bamboo bundles were put into a carbonization tank for carbonization treatment. The carbonization treatment pressure was 0.35MPa, and the time was 120min. After the treatment, the bamboo bundles were dried to a moisture content of 8%. It is then immersed in the phenolic resin solution, and then the molar ratio of phenol in the phenolic resin: formaldehyde: NaOH is 1: 2.1: 0.1; the molecular weight distribution of the phenolic resin accounts for 96% between 200 and 400, The solid content is 20%, the dipping time is 15min, and the dipping amount is 15% of the mass fraction of bamboo bundles; the bamboo bundles after dipping are placed in a mesh belt dryer, and dried t...

Embodiment 3

[0039] Select moso bamboo slices, and use a debonding machine to decompose into loose bundle units that are long, interlinked and keep the original arrangement of fibers. The diameter of the bamboo bundles is 5-8cm; NaOH is used to treat bamboo bundles in an amount of 15%. The treated bamboo bundles are put into a carbonization tank for carbonization treatment. The carbonization treatment pressure is 0.35MPa and the time is 120min. After the treatment, the bamboo bundles are dried to a moisture content of 8%. It is then immersed in the phenolic resin solution, and then the molar ratio of phenol in the phenolic resin: formaldehyde: NaOH is 1: 2.1: 0.1; the molecular weight distribution of the phenolic resin accounts for 96% between 200 and 400, The solid content is 20%, the dipping time is 15min, and the dipping amount is 15% of the mass fraction of bamboo bundles; the bamboo bundles after dipping are placed in a mesh belt dryer, and dried to a moisture content of 12%, and the d...

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Abstract

The invention discloses a method for improving bonding performance of reconstituted bamboo. The method includes the steps of bamboo defibering, bonding improvement treatment, drying, gum dipping, secondary drying of bamboo, reconstituting forming and the like. According to the method, the bamboo is subjected to mechanical defibering, then the bamboo is subjected to spraying treatment and high-temperature carbonization treatment with NaOH, and thus a silicon layer and a wax layer on the surface of the bamboo are effectively removed and damaged; and on the basis, gum dipping and secondary dryingare carried out, and finally reconstituting forming is carried out. According to the reconstituted bamboo prepared by the method, the bonding performance of the bamboo is improved, and in the processing progress, operation is simple, poison, harm and waste are avoided, and the physical mechanical strength is remarkably improved, wherein the horizontal shearing strength is improved by 10% or above, the water-absorbing thickness swelling rate is lowered by 26% or above, the bending strength is improved by 16% or above, and the elastic modulus is improved by 20% or above.

Description

technical field [0001] The invention relates to the field of wood-based panels, in particular to recombined bamboo, and more specifically to a method for improving the gluing performance of bamboo recombined wood. Background technique [0002] In recent years, my country's bamboo industry has developed rapidly, especially the research and development of recombinant bamboo products, which has played a major role in promoting the development of bamboo industry. Recombined bamboo is processed by rolling and decompressing equipment into a network of bamboo bundles that are not broken in the horizontal direction, loose in the vertical direction and interlaced without disturbing the arrangement direction of the bamboo fibers and retaining the basic characteristics of the bamboo, and then dried, sizing and A new type of wood-based panel with high strength, large format size, and natural bamboo texture structure made by hot pressing (or cold pressing) and other recombination process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27J1/00B27K3/52B27K5/00B27K9/00B27N3/12
CPCB27J1/00B27K3/52B27K5/0085B27K9/002B27N3/12
Inventor 马红霞陈利芳李兴伟何雪香曹永建谢桂军王剑菁
Owner GUANGDONG ACAD OF FORESTRY
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