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Method for producing wood fiber glued board and application

A technology of plywood and wood fiber, which is used in the joining of wooden veneers, impregnating wood, and impregnating wood, etc., can solve the problems of difficult to guarantee the stability of product quality, different water absorption expansion rates of wood, and difficult to evenly distribute glue, etc. The effect of low water expansion rate, stable product quality and not easy to crack

Inactive Publication Date: 2010-11-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above method makes full use of wood waste, bamboo waste, small firewood, and small branches, but the process is more complicated, and it is difficult to ensure that the irregular materials are broken evenly, so it is difficult for the glue to be evenly distributed in the module wood, resulting in the water expansion of the wood. Different, so the stability of product quality is difficult to guarantee

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Choose poplar branches with a diameter of 10-80mm, roll them with a machine, peel and remove the small branches, the length is controlled at 60-200cm, and tied according to the length, each 10-25kg;

[0034] (2) put it into 3% hydrogen peroxide and soak it for 2 hours, and carry out degreasing and desugaring and other treatments;

[0035] (3) It is dried, and the moisture content is controlled at 4% to 15%;

[0036] (4) Put the raw material into the spray chamber, and spray glue on it. The glue is selected from commonly used urea-formaldehyde glue, and the spray requires that all branches have glue attached to the surface;

[0037] (5) Put the glue-sprayed small-diameter wood into a cuboid mold of 200*45*80cm, cut off the rope for binding, match the long and short branches evenly, discharge the materials reasonably, and send them to the press for pressing with a pressure of 8Mpa, and then use Screws fix the cover plate and the mold, take out together with the mold,...

Embodiment 2

[0043] (1) select the fast-growing tree pole with a diameter of 10-80 mm, cut the length to 100-200 cm, peel and remove the twigs;

[0044] (2) Send it into the autoclave for cooking treatment, input steam at about 135°C into the autoclave, and control the treatment time within 3 hours;

[0045] (3) It is dried, and the moisture content is controlled at 4% to 15%;

[0046] (4) dipping treatment, using phenolic glue with a solid content of 18 to 25%, dipping for 5 to 15 minutes;

[0047] (5) Drying, the moisture content is controlled at 9% to 15%;

[0048] (6) Put it into a cuboid mold of 200*45*80cm, match the long and short branches evenly, discharge the material reasonably, send it to the press for pressing, the pressure is 7Mpa, and fix the cover plate and the mold with screws after pressing, together with the mold Take it out, and charge 60kg per mold;

[0049] (7) Send it to the curing room together with the mold, heat it to 150°C, and keep it warm for 5 hours to compl...

Embodiment 3

[0052] (1) Select eucalyptus branches with a diameter of 10-60 mm, cut the length to 100-200 cm, peel off the skin and remove the twigs, and roll them mechanically to separate the branches from the skin;

[0053] (2) Soak it in 3% hydrogen peroxide for 1 to 3 hours, and perform degreasing and sugar removal;

[0054] (3) It is dried, and the moisture content is controlled at 4% to 15%;

[0055] (4) put raw material into spray chamber, use urea-formaldehyde glue to carry out glue spraying process to it;

[0056] (5) Put the glue-sprayed small-diameter wood into a cuboid mold of 200*45*80cm, cut off the rope for binding, match the long and short branches evenly, discharge the materials reasonably, and send them to the press for pressing with a pressure of 8Mpa, and then use Screws fix the cover plate and the mold, take out together with the mold, and charge 50kg for each mold;

[0057] (6) Store for 72 hours, remove the mold after the glue is completely cured, and store for ano...

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Abstract

The invention provides a method for making a wood-fiber laminated wood. The method comprises: gluing raw materials like small-diameter materials, small wattles and so on into a primary square material; planing the square material into even splints by the modes of mechanical cutting, planing, sawing and so on; gluing the splints into various boards. The wood-fiber laminated wood keeps the originalfiber tissues and natural textures of the small-diameter materials. Compared with ordinary logs, the physicochemical performances of the laminated wood are improved greatly, and rigidity, density, static bending strength, anti-impact strength, elastic modulus and so on are 2 to 4.5 times higher than those of the ordinary logs. The laminated wood also has the performances which the ordinary logs do not have, such as corrosion resistance, borer proofing, no deformation, no crack, water resistance and so on, and can replace solid wood used for furniture, floors, building materials and occasions with special requirements.

Description

technical field [0001] The invention relates to a method for producing wood fiber plywood, in particular to a method for producing wood fiber plywood by using small-diameter timber instead of logs and its application in producing wood fiber plywood. Background technique [0002] At present, with the rapid development of construction, furniture, flooring, papermaking and other industries, a large number of log resources are consumed, and forest resources are decreasing day by day, which easily lead to problems such as soil erosion and environmental degradation. [0003] During the use of logs, it is necessary to carry out a long period of aging treatment, degreasing, anti-corrosion and other pretreatments on the logs. There are more wastes generated during the processing, and most of the logs are also easy to crack, easy to deform, not resistant to water, and not resistant to corrosion. Sunshine and other shortcomings. [0004] Chinese patent application (patent number: 2007...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/04B27K3/02B27K3/16B27G11/00B27D1/06B27D1/08
Inventor 李利敏吴良欢马国瑞
Owner ZHEJIANG UNIV
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