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Oriented strand board and preparation method thereof

A technology of oriented particle board and shavings, which is applied to flat products, other household appliances, household components, etc., and can solve problems such as static bending strength and elastic modulus that cannot be satisfied

Inactive Publication Date: 2013-02-13
快乐木业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when such oriented strand board is used for container boards, its static bending strength and elastic modulus cannot meet the requirements for container boards

Method used

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  • Oriented strand board and preparation method thereof
  • Oriented strand board and preparation method thereof
  • Oriented strand board and preparation method thereof

Examples

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preparation example Construction

[0031] The present invention has no special limitation on the preparation method of the shavings, and the technical solutions for the preparation of the shavings well-known to those skilled in the art can be adopted. The present invention preferably adopts a chipping machine whose model is CARMANAH 34 / 114BLOCK DISC FLAKER (FORMERLY CAE) SOB / SERIAL NO.150-83 to produce shavings of the above size. During the process of producing the above shavings, the length of the feed wood segment is preferably is 800mm, and the diameter is preferably 100mm~600mm.

[0032] The oriented strand board provided by the present invention includes a bottom board 3 . The present invention has no special limitation on the type and preparation method of the bottom board, and the bottom board in the oriented strand board well-known to those skilled in the art can be used. In the present invention, the bottom plate preferably includes 1-7 layers of veneer, more preferably 3-5 layers; the top layer of th...

Embodiment 1

[0047] Provide the shavings that are 120mm in length, 20mm in width and 0.5mm in thickness, spray and atomize the adhesive on the surface of the shavings according to the mass ratio of the shavings and the adhesive of 100:18, and complete the sizing process for the shavings; The shavings evenly mixed with the adhesive are arranged in layers along the wood grain direction of the shavings by a paving machine, and the shavings are paved to obtain a slab; the obtained slab is pre-pressed and then hot-pressed, and the pressure of the hot-pressing is 2.9MPa ~3.3MPa, the temperature is 135°C~145°C, the time is 1650s~1700s, and the oriented strand board is obtained.

[0048] The present invention carries out the performance test of the obtained oriented strand board, the density is measured according to the method recorded in 4.2 in the national standard GB / T17657-1999, and the moisture content is measured according to the national standard GB / T 17657-1999 "Man-made board and facing wo...

Embodiment 2

[0051] Provide shavings with a length of 110mm, a width of 15mm, and a thickness of 0.45mm, and spray the adhesive on the surface of the shavings according to the mass ratio of the shavings to the adhesive of 100:15 to complete the sizing process for the shavings; mix the obtained shavings with the adhesive evenly The wood shavings are stacked and arranged mutually oriented along the wood grain direction of the shavings by a paving machine, and the shavings are paved to obtain a slab; the obtained slab is pre-pressed and then hot-pressed, and the pressure of the hot-pressing is 2.7MPa~3.1MPa , the temperature is 130° C. to 140° C., and the time is 1600s to 1650s to obtain an oriented strand board.

[0052]The present invention carries out the performance test of the obtained oriented strand board, the density is measured according to the method recorded in 4.2 in the national standard GB / T17657-1999, and the moisture content is measured according to the national standard GB / T 1...

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Abstract

The invention provides an oriented strand board which comprises a face board, cross-band veneer and a bottom board. The oriented strand board is characterized in that the mass ratio of wood shavings and tackiness agent in the cross-band veneer is 100: (10-25). The mass ratio of wood shavings and tackiness agent in the oriented strand is 100: (10-25), and therefore bonding strength can be guaranteed, mechanical property of a product can be improved, and a phenomenon of bubbling in a producing process is avoided. An experimental result shows that the rift grain static bending intensity of the oriented strand is greater than or equal to 50 MPa, and the cross grain static bending intensity of the oriented strand is greater than or equal to 30 MPa. The rift grain elasticity modulus of the oriented strand is greater than or equal to 5000 MPa, and the cross grain elasticity modulus of the oriented strand is greater than or equal to 3000 MPa. The internal bonding strength of the oriented strand is greater than or equal to 0.45 MPa, and the oriented strand can bear the dynamic load greater than or equal to 2.0 T.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an oriented strand board and a preparation method thereof. Background technique [0002] Oriented strand board (OSB) is a product that is mainly used to replace plywood in the construction industry. It is made of narrow, long and flat large shavings. become. When the shavings are paved and formed, the glue-mixed particle boards are arranged longitudinally according to the fiber direction, and then the particle boards are pressed. The shape of this particleboard requires a larger aspect ratio, and the thickness is slightly thicker than ordinary particleboard. Its performance is similar to that of plywood, and it is often used as a structural material instead of plywood. [0003] The prior art discloses a variety of oriented strand boards, such as the Chinese patent with the publication number CN101332614A disclosing a flat wood oriented strand board and its manufactu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/02B27N3/08
Inventor 王道江刘小兵邵学粉张禄森刘年祥
Owner 快乐木业集团有限公司
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