Super-thick bamboo-wood composite board and producing method thereof

A bamboo-wood composite and board technology, which is applied in the manufacturing field of ultra-thick bamboo-wood composite boards and ultra-thick bamboo-wood composite boards, can solve the problems of increased cost, large amount of glue, and difficulty of thick boards, and achieves the realization of manufacturing, The effect of reducing the amount of glue and solving the warpage

Active Publication Date: 2009-09-09
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] If the wood is cut into veneers of (1-3) mm and then made into thick composite boards, the number of veneer layers used in the composite boards will be more, and the glue layers will be more, resulting in a larger amount of glue. In this way, on the one hand, the cost is increased, and on the other hand, due to the use of aldehyde adhesives such as phenolic resin or urea-formaldehyde resin, the degradation of harmful gases such as formaldehyde or free phenol is increased.
[0008] If the wood is sawed into (2-10) cm wide and (1-5) mm thick wood strips, the utilization rate of the wood is also reduced due to the loss of the saw road
[0009] In addition, bamboo / wood is a poor conductor of heat, and it is difficult to produce thick plates by hot pressing. Generally, the thickness of existing plates is less than 30mm

Method used

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  • Super-thick bamboo-wood composite board and producing method thereof
  • Super-thick bamboo-wood composite board and producing method thereof
  • Super-thick bamboo-wood composite board and producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] The manufacturing technology of laminated bamboo timber belongs to the well-known technology (Zhao Renjie, Yu Yunshui, Bamboo-based Panel Technology, China Forestry Publishing House, 2002). The bamboo is cut into 2500mm long bamboo sections by a cutting machine; Cut into bamboo slices with a width of 20mm; use a rough planer to remove part of the bamboo green and bamboo yellow on the surface; steam and cook the above rough planed bamboo strips, and carry out anti-mildew and anti-corrosion treatments; dry them to a moisture content of 7 %-9%; The dried bamboo strips are finely planed with a precision planer to keep the thickness accuracy at ±0.2mm, and the water-based polymer isocyanate adhesive is coated on the side and surface of the bamboo strips according to the predetermined width and After the thickness has passed through the horizontal stitching and the parallel grain assembly, using a press with a positive pressure of 2.0 MPa and a lateral pressure of 0.2 MPa, it is ...

Embodiment 2

[0108] The manufacturing technology of reorganized bamboo belongs to well-known technology (Zhao Renjie, Yu Yunshui, Bamboo-based wood-based panel technology, China Forestry Publishing House, 2002). It is divided into cold-pressing drying method and hot-pressing method. The cold-pressing drying method is to process bamboo into bamboo filaments or bamboo bundles, then dipping, drying, molding, cold pressing, high temperature drying and gluing to make the board; The pressing method is to process bamboo into bamboo filaments or bamboo bundles, and then dipping, drying, paving, and hot pressing. The above-mentioned reconstituted bamboo is sawed, cross-spliced, and finger-joined to form a thickness of 5, 6, Reconstituted bamboo veneers of 7.5, 10, 15 and 20mm, width 50mm and length 4000mm.

[0109] The peeling, degradation and gluing process of the Chinese fir veneer is the same as in Example 1.

[0110] Lay the glued recombined bamboo veneer and Chinese fir super-thick veneer on the u...

Embodiment 3

[0116]The manufacturing process of the laminated bamboo and the reconstituted bamboo is the same as in Example 1 and Example 2, and it is sawed into a board with a thickness of 8 mm.

[0117] The peeling and stress degradation of the eucalyptus veneer is the same as in Example 1, and the thickness of the veneer is 8 mm.

[0118] The resorcinol adhesive is composed of a main agent and a curing agent, and the amount of the curing agent is (8-15)% of the main agent. After stirring, the resorcinol adhesive is formed.

[0119] The main agent is a linear resorcinol resin liquid containing alcohol, the curing agent is polyoxymethylene, and the dosage of polyoxymethylene is (8-15)% of the main agent. After being evenly stirred, a resorcinol adhesive is formed.

[0120] Coat the resorcinol adhesive evenly on the surface of the stress-degraded wood veneer and the surface of the reconstituted bamboo or bamboo glulam. The amount of glue for each layer is 150g / m 2 ~300g / m 2 between.

[0121] P...

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Abstract

The invention provides a super-thick bamboo-wood composite board, which comprises a core board, a surface board and a back board, wherein the core board is a super-thick rotary-cut single board with the thickness of 6-12 mm, the surface board and the back board are made of bamboo, the core board comprises a plurality of super-thick single boards, the contiguous layers of the super-thick single boards are in the combination along the grain, a glue layer is arranged between contiguous single boards, the adhesive of the glue layer is an aqueous macromolecule isocyanate adhesive, the super-thick single boards of the core layer are single boards after the processing of stress degradation, and spot-shape or segment-shape crack grains are formed in the direction along the grain of the loosened surface of every single board. Compared with the prior composite board of the same thickness, the composite board has greatly-reduced glue amount and no deformation or distortion.

Description

Technical field [0001] The invention relates to a composite board and the manufacturing field thereof, provides an ultra-thick bamboo-wood composite board, and also provides a manufacturing method of the ultra-thick bamboo-wood composite board. Background technique [0002] With the rapid development of the application of wood structure in my country, it has driven the increase in the demand for structural materials in my country. According to the statistics of the Ministry of Housing and Urban-Rural Development, my country’s structural material gap in 2007 was 40 million m3. With the continuous development of wood structure houses and buildings in my country Development, plus about 20 million m3 of materials for Sichuan earthquake reconstruction, by 2010, my country’s structural material gap will reach 90 million m3. According to Canadian federal government officials, Canada currently has about 300 timber-framed houses built in mainland China, and plans to build another 9,000. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B32B21/13B27D1/10C09J175/04C09J161/12
Inventor 余养伦于文吉任丁华祝荣先周月
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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