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Composition, formaldehyde-free artificial board prepared with same and preparation method of formaldehyde-free artificial board

A composition and wood-based panel technology, applied in the direction of manufacturing tools, applications, flat products, etc., can solve the problems of cutting edge collapse, easy to produce edge collapse, etc.

Active Publication Date: 2021-03-26
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to aim at the problem that the formaldehyde-free wood-based panel prepared under the low addition amount of PMDI adhesive is easy to produce edge chipping after the melamine impregnated paper veneering process, provides a kind of composition and uses this composition Method for preparing formaldehyde-free wood-based panels, improving the problem of cutting and chipping of formaldehyde-free wood-based panels after veneering

Method used

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  • Composition, formaldehyde-free artificial board prepared with same and preparation method of formaldehyde-free artificial board
  • Composition, formaldehyde-free artificial board prepared with same and preparation method of formaldehyde-free artificial board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0088] Adopt the aforementioned "straw board preparation steps" to prepare straw boards, the PMDI addition accounts for 3.5% of its weight in the surface layer structural unit, and the core layer is 3%. In the surface layer straw unit, component (b) and component (c) are used in table 1. ) selects dibutyl maleate for use, and consumption is 5 parts, and component (d) selects yttrium chloride for use, and consumption is 1 part; Show.

Embodiment 6-8

[0099] Component (c) as shown in Table 3 was used in the surface straw and core shavings, and the dosage of the remaining components and the board making steps were the same as in Example 4. The test results are shown in Table 5.

[0100] Table 3 Embodiment 6-8 plate making specific parameters

[0101] Type of component (c) *Amount / serving Example 6 Dibutyl maleate 2 Example 7 Dioctyl maleate 2 Example 8 Dioctyl maleate 5

[0102] *Amount / part: Calculated based on the amount of component (a) being 100 parts by mass

Embodiment 9

[0114] In Example 9, the dosage of component (d) yttrium chloride was 3 parts, and the dosages of the remaining components and the board-making steps were the same as in Example 4. The board-making test results are shown in Table 6.

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Abstract

The invention discloses a composition, a formaldehyde-free artificial board prepared with the composition and a preparation method of the formaldehyde-free artificial board. The composition comprises(a) an isocyanate adhesive, (b) a powder auxiliary agent, (c) an organic auxiliary agent, (d) a yttrium compound and (e) water-based emulsion. The preparation method of the artificial board comprisesthe following steps of mixing the components (a) and (c) and applying the mixture to a surface layer unit and a core layer unit; mixing and adding the component (b) and the component (d) into the surface layer unit; adjusting the moisture contents of the obtained surface layer unit and the core layer unit, and then carrying out laying, pre-pressing and hot-pressing to prepare a rough board; and after sanding treatment, the component (e) is sprayed to the upper surface and the lower surface of a plate for veneering, and carrying out veneering in the end to obtain the formaldehyde-free artificial board. With the composition, the phenomenon that an artificial board cracks or is broken on the edges after being subjected to veneering remarkably happen less, and the composition is suitable for solving the problems of cracking and edge breakage of a particle board (PB) and an oriented strand board (OSB) with low content of added isocyanate, and is more effective for reducing cracking and edgebreakage of a straw board.

Description

technical field [0001] The invention relates to the field of formaldehyde-free wood-based panels, in particular to a composition for improving cutting and chipping of formaldehyde-free wood-based panels and a method for preparing formaldehyde-free wood-based panels. Background technique [0002] Wood or other non-woody plants are used as raw materials, separated into particles, needle-like or flake-like shavings, fibers and other units after mechanical processing, and then applied with adhesives or other additives and thermally compressed to make wood-based panels. Quickly gain market recognition. Traditional wood-based panel production is mainly based on "three-formaldehyde glue", including urea-formaldehyde resin adhesive, phenolic resin adhesive and melamine urea-formaldehyde resin adhesive; these adhesives will release formaldehyde gas during manufacture, use and finished boards , pollute the environment and endanger human health. [0003] The new PMDI (polymethylene p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/02B27N3/10B27N3/00B27N3/18B27N1/02B27N7/00C09J175/08
CPCB27N3/02B27N3/10B27N3/002B27N3/18B27N1/0209B27N7/005C09J175/08Y02W30/91
Inventor 李厚义涂松孙卫华张梓军王向硕范丽颖孙鹏胡兵波
Owner WANHUA CHEM GRP CO LTD