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Grass tree structural board and production technology thereof

A production process and a technology for structural panels, applied in the field of Hemu structural panels and their production processes, can solve the problems of large fluctuations in product quality, difficult quality assurance, low production efficiency, etc., and achieve great economic benefits and social value, and fiber quality. Guaranteed, improved efficiency and quality results

Active Publication Date: 2015-10-07
湖北益嘉林业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the production efficiency of the straw particleboard produced by the traditional process is low, the board density is low, and the water expansion rate is high, and the density can only reach 0.70~0.76g / cm 3 , the water expansion rate is 4.5~6.0%, and the static bending strength is low, which can only reach 12~20MPa. At the same time, the production quality is unstable, the product quality fluctuates greatly, and the surface is often uneven, which seriously affects the application of the board.
The traditional method to solve the surface unevenness is to first sand the surface of the oriented strand board with a fixed thickness, and then carry out the second paste of density board or solid wood veneer. The disadvantages are: complex process, low production efficiency, low cost High, and the board is easy to crack, easy to absorb water and expand, and the static bending strength is low, so the quality is difficult to guarantee

Method used

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  • Grass tree structural board and production technology thereof
  • Grass tree structural board and production technology thereof
  • Grass tree structural board and production technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as Figure 1-3 Shown: a kind of Hemu structural board, comprises successively the lower layer fiber skin layer 3, the multi-layer wood oriented strand core board layer 2 in the middle and the upper layer fiber skin layer 1, described lower layer fiber skin layer 3, the middle multi-layer The first layer of wood oriented strand board layer 2 and the upper layer of fiber surface board layer 1 are integrally pressed and formed. Its production process comprises the following steps:

[0032] 1. Any one or more kinds of straw raw materials in wheat straw, rice straw, corn stalk, sorghum stalk, reed stalk, cotton stalk, hemp stalk, sunflower stalk, and bean stalk are cut into 8cm length by cutting machine, and then enter into re-shredding Operation, when adopting multiple crop stalks, its mixing ratio can be any ratio.

[0033] 2. The 8cm straw raw material section is crushed into 1cm strips by the re-crusher and then enters the drying process. By fully cutting and crus...

Embodiment 2

[0047] The difference between the present embodiment and embodiment one is: in the step 1 in its production process, the stalk raw material is truncated to be 12cm long;

[0048] In step 2, the crushed length is 1.5cm;

[0049] The fiber sizing ratio in the step 6 is 80kg / m3;

[0050] In step 7, the water content after drying is 4%, the wood chip sizing ratio is 55kg adhesive / 1m3 wood chips, and the water content after sizing is controlled at 10%;

[0051] In step 8, the thickness of the upper and lower surface layers is 30mm, and the thickness of the core layer is 200mm;

[0052] Step 9 adopts the pressure of 10Mpa to preload;

[0053] In step 10, the temperature of the platen of the press is controlled at 190°C.

[0054] Adopt the production process of the present embodiment to produce the same type of grass structural board and take samples for inspection, and the inspection results are as follows:

[0055] Fiber layer density (g / cm 3 ) Core layer density...

Embodiment 3

[0057] The difference between this embodiment and embodiment one or two is: in the step 1 in its production process, the stalk raw material is truncated to be 20cm long;

[0058] In step 2, the crushed length is 2cm;

[0059] The fiber sizing ratio in the step 6 is 90kg / m3;

[0060] In step 7, the water content after drying is 5%, the wood chip sizing ratio is 60kg adhesive / 1m3 wood chips, and the water content after sizing is controlled at 12%;

[0061] In step 8, the thickness of the upper and lower surface layers is 50mm, and the thickness of the core layer is 300mm;

[0062] Step 9 adopts the pressure of 12Mpa to preload;

[0063] In step 10, the temperature of the platen of the press is controlled at 200°C.

[0064] Adopt the production process of the present embodiment to produce the same type of grass structural board and take samples for inspection, and the inspection results are as follows:

[0065] Fiber layer density (g / cm 3 ) Core layer density (...

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Abstract

The invention discloses a grass tree structural board adopting straw and branch firewood as raw materials and a production technology thereof. Waste generated in the agricultural production process is fully utilized, crop straw of wheat straw, straw, cornstalks, sorghum stalks and the like and branch firewood waste abandoned in the production construction and updating modification process are used as raw materials, the novel artificial plate manufactured through the brand-new production technology is used for replacing traditional solid wood products to turn the straw into wealth, and the value of the crop straw is greatly improved. Meanwhile, the production cost of the plate is effectively lowered, and great economic benefits and social value are achieved. One-time hot press molding is achieved, and the problems that due to the fact that stacked gaps exist between wood sheets of an existing oriented strand board, the surface of a plate is uneven, and the plate cannot be directly used for producing surface decorative plates are solved. The density of a fiber surface plate layer can be 0.8 g / cm<3>, the density of a wood shaving core plate layer can be 0.78 g / cm<3>, the static bending intensity of the plate can reach 35.4 MPa effectively, and the thickness swelling rate of water absorption is smaller than 2% within 36 hours.

Description

technical field [0001] The invention relates to the technical field of artificial board production, in particular to a grass structural board made of straw and twig firewood and a production process thereof. Background technique [0002] Today, climate change has attracted global attention, and forest protection has become a consensus of mankind. However, the world's timber resources that can be cut down are decreasing day by day, and the demand for wood and its products is increasing due to social and economic development. Using crop straw to produce various decorative panels has become a a trend. Crop straw includes: grain crop straw (wheat straw, rice straw, corn stalk, sorghum stalk, etc.), economic crop straw (cotton stalk, hemp stalk, reed stalk, sunflower stalk, bean stalk, etc.). A considerable amount of crop straw is produced in our country every year. Using crop straw raw materials to manufacture decorative panels can not only save forest resources, but also find ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/00B27N3/08
CPCB27N3/12B27N3/14B27N3/18
Inventor 李昌华龙明金
Owner 湖北益嘉林业发展有限公司
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