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A kind of preparation method of high weather resistance recombinant bamboo

A technology of high weather resistance and recombined bamboo, which is applied in the direction of pretreatment of flat products, manufacturing tools and molding materials, etc. It can solve the problems of poor dimensional stability, high water absorption thickness expansion rate, poor weather resistance, etc. Effect of improving dimensional stability and ensuring airtightness

Active Publication Date: 2018-06-01
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Recombined bamboo, also known as heavy bamboo, is a new bamboo material that reorganizes and strengthens bamboo bundles. It has become one of the mainstream products in the bamboo industry. The original recombined bamboo products have poor weather resistance. Some products are difficult to meet the conditions of outdoor use, mainly reflected in poor dimensional stability, high water absorption thickness expansion rate, product mildew resistance, anti-corrosion performance and other indicators do not meet the relevant national standards, the main reason is that the nutrients in bamboo such as sugar, Starch and sugar substances and hemicellulose in bamboo are relatively high, and these substances have strong water absorption properties

Method used

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  • A kind of preparation method of high weather resistance recombinant bamboo
  • A kind of preparation method of high weather resistance recombinant bamboo

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Preparation of high weather resistance recombinant bamboo by cold pressing and heat curing

[0018] High weather resistance recombinant bamboo craft, such as figure 1 As shown, including sawing, splitting, defrosting, heat treatment, dipping, drying, paving and molding processes:

[0019] (1) Sawing

[0020] Saw fresh bamboo into 2000mm bamboo tubes,

[0021] (2) Split

[0022] Divide the bamboo material into 20-30mm bamboo strips, remove the bamboo green and bamboo yellow, and then divide it into bamboo strips with a thickness of 3 mm;

[0023] (3) Release

[0024] Using a debonding machine, several cracks are formed in the longitudinal direction of the bamboo strips, and the bamboo strips are decomposed into bamboo bundles composed of 2mm bamboo fiber bundles; the moisture content of the decomposed bamboo bundles is detected by a moisture content detector, and the moisture content is selected to be greater than 30%. bamboo bundles;

[0025] (4) Heat tr...

Embodiment 2

[0035] Example 2 Preparation of high weather resistance recombinant bamboo by hot pressing

[0036] High weather resistance recombinant bamboo craft, such as figure 1 As shown, including sawing, splitting, defrosting, heat treatment, dipping, drying, paving and molding processes:

[0037] (1) Sawing

[0038] Saw fresh bamboo into 2600mm bamboo tubes,

[0039] (2) Split

[0040] The bamboo is divided into 20-30mm bamboo strips, and after removing the green and yellow bamboo, it is divided into bamboo strips with a thickness of 2 mm;

[0041] (3) Release

[0042] Using a debonding machine, several cracks are formed in the longitudinal direction of the bamboo strips, and the bamboo strips are decomposed into bamboo bundles composed of 3mm bamboo fiber bundles; the moisture content of the decomposed bamboo bundles is detected by a moisture content detector, and the moisture content is selected to be greater than 30%. bamboo bundles;

[0043] (4) Heat treatment

[0044] The ...

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Abstract

Disclosed is a preparing method of high-weather-resistance reconsolidated bamboo. A pressure tank is adopted to treat bamboo ties, and is placed in hot oil, so that sealing performance in the heat treatment process is ensured; the temperature of heat treatment can be up to 250 DEG C, and nutrient substances such as protein, starch and low carbon sugar in the bamboo can be fully degraded; through improvement of a subdivision and defibering process, the thickness of bamboo strips is controlled, the width of bamboo fiber bundles is controlled, and a seepage path of water steam and adhesive of the bamboo in a heat treatment process and a gum dipping process is improved; through the control over the gum dipping process and the molecular weight of adhesive, the gum dipping amount and gum dipping uniformity are ensured; and through the control over a paving technology and a forming technology, density of a product and uniformity of the density are ensured, and the reconsolidated bamboo is prepared. The properties of size stability, corrosion prevention, mould prevention and the like of the product are improved, and the use requirement of the outdoor reconsolidated bamboo for weather resistance is met.

Description

technical field [0001] The invention relates to the field of wood-based panels, in particular to a highly weather-resistant recombined bamboo. Background technique [0002] Recombined bamboo, also known as heavy bamboo, is a new bamboo material that reorganizes and strengthens bamboo bundles. It has become one of the mainstream products in the bamboo industry. The original recombined bamboo products have poor weather resistance. Some products are difficult to meet the conditions of outdoor use, mainly reflected in poor dimensional stability, high water absorption thickness expansion rate, product mildew resistance, anti-corrosion performance and other indicators do not meet the relevant national standards, the main reason is that the nutrients in bamboo such as sugar, Starch and sugar substances and hemicellulose in bamboo are relatively high, and these substances have strong water absorption properties. Contents of the invention [0003] The purpose of the present invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/08B27N1/02B27N1/00B27K9/00B27K3/08
CPCB27K3/08B27K9/002B27K2240/20B27N1/00B27N1/02B27N3/08
Inventor 李延军许斌何文程大莉梁星宇
Owner NANJING FORESTRY UNIV