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Three-layer structure wooden composite board material and mfg method

A composite board and three-layer structure technology, applied in the field of architectural decoration, can solve the problems of low nail holding force of the board, unavoidable release of formaldehyde, low static bending strength and bearing capacity of the board, and achieve good board quality and product environmental protection performance. The effect of high, static bending strength and nail holding force

Inactive Publication Date: 2004-06-09
SOUTHWEST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing particleboard and medium density fiberboard are all single structural units, using formaldehyde series resin adhesives. Therefore, the main problems in the process of use are: formaldehyde release is inevitable, the nail holding force of the board is low, the static bending strength of the board and Disadvantages such as low carrying capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0009] Example 1: Firstly, pine shavings and fibers were prepared from 8-10-year-old Yunnan pine trees. The shavings of the core layer are obtained by the chipping method. The shavings are 45mm long, 10mm wide, and 0.1mm thick. The shavings are dried to a moisture content of 8% before sizing (MDI), and the sizing amount is 6%. Paraffin waterproofing was applied at 1%. The fiber preparation of the surface layer is prepared using conventional techniques. The fiber is applied with urea-formaldehyde resin glue, the application amount is 1%, and then dried to a moisture content of 10%. Then pave in the order of the bottom layer, core layer, and upper layer. Finally, it is hot-pressed and formed under normal operating conditions. The thickness of the core layer of the formed three-layer wood composite board accounts for 21% of the board.

example 2

[0010] Example 2: basically the same as Example 1. The differences are: the shavings of the core layer are 70mm long, 30mm wide and 0.5mm thick, and the thickness of the core layer of the formed three-layer wood composite board accounts for 61% of the board. The surface layer is made of polyester fiber, and the adhesive used is MDI.

example 3

[0011] Example 3: basically the same as Example 1. The differences are: the shavings of the core layer are 110mm long, 50mm wide and 1mm thick, and the thickness of the core layer of the formed three-layer wood composite board accounts for 91% of the board. The surface layer is made of a mixture containing plant fiber and glass fiber, the composition ratio of which is 6:3:1, and the adhesive used is MDI.

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Abstract

The present invention relates to a three-layer structure wooden composite plate material and its production method, belonging to the field of building decorative technology. Said composite plate material is formed from surface layer and core layer, in which the core layer material formed from flat structure unit adopts wood material, bamboo material and straw, and said flat structure unit size is: length 45-110 mm, width 10-50 mm and thickness is 0.1-1 mm, and the thickness of core layer is 21-91% of that of plate material. Said surface layer material is made up by selecting fibre or particle structure unit, and adopting the procedures of preparing material, laying-forming, pre-pressing and hot-pressing. The adhesive used by core layer is isocyanate adhesive. Said invention also provides the steps of laying, forming process.

Description

[0001] Technical field: [0002] The invention relates to a wood composite board with a three-layer structure and a manufacturing method thereof, belonging to the technical field of architectural decoration. Background technique: [0003] The existing particleboard and medium density fiberboard are all single structural units, using formaldehyde series resin adhesives. Therefore, the main problems in the process of use are: formaldehyde release is inevitable, the nail holding force of the board is low, the static bending strength of the board and The carrying capacity is low and other shortcomings. Invention content: [0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a three-layer structure wooden composite board composite and its manufacturing method. [0005] The present invention is achieved like this: [0006] The three-layer structure wood composite board consists of a surface layer and a core layer. Among them...

Claims

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Application Information

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IPC IPC(8): B32B21/00
Inventor 杜官本杜依泓
Owner SOUTHWEST FORESTRY UNIVERSITY
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