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Preparation method of efficient special-shaped bamboo scrimber

A technology for reconstituting bamboo materials and bamboo materials, which is applied in the directions of impregnating wood, manufacturing tools, and wood impregnation, etc., can solve the problem of uneven softening effect of steam heating bamboo materials, and single structure and form and insufficient depth of flat plate group blank hot-pressed glued products. And other issues

Inactive Publication Date: 2020-10-23
LONGYAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following defects: one is that the pyrolysis softening effect of steam heating bamboo is uneven, the depth is not enough, and the change is not significant; The product structure and form of billet hot-press glued are single

Method used

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  • Preparation method of efficient special-shaped bamboo scrimber
  • Preparation method of efficient special-shaped bamboo scrimber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The specific operation steps of the preparation method of a kind of high-efficiency special-shaped bamboo recombined wood of the present invention are as follows:

[0021] (1) Bamboo lye dipping and cooking treatment

[0022] The fresh raw bamboo is prepared by special equipment, and then the bamboo is soaked in NaOH dilute alkali solution with a mass ratio concentration of 2%. After impregnating phenolic resin or other amino resin glue and drying treatment, the trace amount of lye remaining in the bamboo is conducive to the curing of thermosetting phenolic resin in the next step; the washing liquid is recycled as low-concentration lye to ensure environmental protection during the production process.

[0023] (2) Bamboo impregnated with glue and dried

[0024] Use impregnated phenolic resin or other amino resin glue as the thermosetting resin, and the solid content of the impregnated resin is 15%. The bamboo impregnation process usually adopts the direct impregnation m...

Embodiment 2

[0028] A kind of preparation method of high-efficiency special-shaped bamboo recombined timber of the present invention concrete operation steps are as follows:

[0029] (1) Bamboo lye dipping and cooking treatment

[0030] The fresh raw bamboo is prepared by special equipment, and then the bamboo is soaked and cooked in NaOH dilute lye with a mass ratio concentration of 3%. The technical parameters of cooking and softening are pressure 0.35Mpa, temperature 120°C, time 135min, and then soaking and cleaning for about 7min After impregnation with phenolic resin or other amino resin glue and drying treatment, the trace amount of lye in the bamboo is conducive to the curing of the thermosetting phenolic resin; the lotion is used as a low-concentration lye for recycling to ensure environmental protection during the production process.

[0031] (2) Bamboo impregnated with glue and dried

[0032] Use impregnated phenolic resin or other amino resin glue as the thermosetting resin, an...

Embodiment 3

[0036] The specific operation steps of the preparation method of a kind of high-efficiency special-shaped bamboo recombined wood of the present invention are as follows:

[0037] (1) Bamboo lye dipping and cooking treatment

[0038] The fresh raw bamboo is prepared by special equipment, and then the bamboo is soaked and cooked in NaOH dilute lye with a mass ratio concentration of 4%. Impregnating phenolic resin or other amino resin glue and drying treatment, the small amount of lye in bamboo is conducive to the curing of thermosetting phenolic resin; the lotion is used as a low-concentration lye for recycling to ensure environmental protection during the production process.

[0039] (2) Bamboo impregnated with glue and dried

[0040] Use impregnated phenolic resin or other amino resin glue as the thermosetting resin, and the solid content of the impregnated resin is 35%. The bamboo impregnation process usually adopts the direct impregnation method at room temperature, and the a...

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Abstract

The invention discloses a preparation method of an efficient special-shaped bamboo scrimber. Alkali liquor dipping, cooking, softening and high-frequency heating processes are adopted; the method comprises the following steps: soaking and cooking bamboo wood by using an alkali liquor, rinsing, soaking in a thermosetting resin and drying, carrying out recombining high-frequency heating treatment onbamboos; wherein the structure and characteristics of the high-efficiency special-shaped bamboo scrimber product are obviously optimized and improved, the average density of the high-efficiency special-shaped bamboo scrimber product can be controlled to be 0.90-1.20 g / cm < 3 >, the bending strength of the high-efficiency special-shaped bamboo scrimber product is 90-150 MPa, the elastic modulus ofthe high-efficiency special-shaped bamboo scrimber product is 9000-15000 MPa, and the water-absorbing thickness change rate is less than 5%. The prepared efficient special-shaped bamboo scrimber is good in mechanical property and machining property, and has high weather resistance, moisture resistance and dimensional stability.

Description

technical field [0001] The invention relates to the preparation technology of bamboo wood in the field of forestry engineering, in particular to a preparation method of high-efficiency special-shaped bamboo recombined wood, and specifically relates to the application technology of preparing bamboo recombined wood by soaking in lye, cooking and softening and high-frequency heating. Background technique [0002] Existing bamboo recombined wood preparation technology generally adopts methods such as pyrolysis of bamboo by steam heating method, impregnated adhesive, bamboo drying, cold pressure gluing of square material assembly or hot pressure gluing of planar plate assembly. This method has the following defects: one is that the pyrolysis softening effect of steam heating bamboo is uneven, the depth is not enough, and the change is not significant; The structure and form of the billet hot-press glued product are single. Contents of the invention [0003] The purpose of the ...

Claims

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Application Information

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IPC IPC(8): B27K3/52B27K9/00
CPCB27K3/52B27K9/002
Inventor 苏团周志旺谢桂香董雁侯伦灯
Owner LONGYAN UNIV
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