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A kind of composition, formaldehyde-free wood-based panel prepared by using the composition and preparation method thereof

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: 2022-07-12
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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  • A kind of composition, formaldehyde-free wood-based panel prepared by using the composition and preparation method thereof
  • A kind of composition, formaldehyde-free wood-based panel prepared by using the composition and preparation method thereof
  • A kind of composition, formaldehyde-free wood-based panel prepared by using the composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0088] The straw board was prepared by the above-mentioned "straw board preparation steps". The PMDI addition amount in the surface layer structural unit accounted for 3.5% of its weight, and the core layer was 3%. In the surface layer straw unit, components (b) and components (c) in Table 1 were used. ) select dibutyl maleate, and the consumption is 5 parts, and component (d) selects yttrium chloride for use, and the consumption is 1 part; Show.

Embodiment 6-8

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

[0100] Table 3 Specific parameters of embodiment 6-8 board making

[0101] Component (c) Kind *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 consumption of component (d) yttrium chloride is 3 parts, and the consumption of the remaining components and the plate-making steps are the same as those of Example 4, and the plate-making test results are shown in Table 6.

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Abstract

The invention discloses a composition, an aldehyde-free wood-based panel prepared by using the composition and a preparation method thereof. The composition comprises: (a) isocyanate binder, (b) powder auxiliary agent, (c) organic auxiliary agent, (d) yttrium compound and (e) aqueous emulsion. The method for preparing a wood-based panel comprises the following steps: mixing the components (a) and (c) and applying them to the surface and core layer units; mixing the components (b) and the component (d) and adding them to the surface layer units; adjusting the obtained surface layer units , the moisture content of the core unit, and then paving, pre-pressing, and hot-pressing to prepare a rough board; after sanding treatment, spray the component (e) on the upper and lower surfaces of the board to be veneered, and finally veneer to obtain an aldehyde-free wood-based panel. . The composition can obviously reduce the edge chipping of wood-based panels after veneering, and is suitable for improving the problem of chipping and edge chipping of particleboard (PB) and veneeable oriented strand board (OSB) under low isocyanate addition amount, and is suitable for cutting edge chipping of straw board. The edge collapse problem is more effective.

Description

technical field [0001] The invention relates to the field of aldehyde-free wood-based panels, in particular to a composition for improving the cutting edge of aldehyde-free wood-based panels and a method for preparing the aldehyde-free wood-based panels. Background technique [0002] Using wood or other non-wood plants as raw materials, after mechanical processing to separate into particles, needle or flake shavings, fibers and other units, applying adhesives or other additives and thermal compression to make wood-based panels, with its ultra-high cost performance Quickly gain market recognition. The production of traditional wood-based panels is mainly based on "trialdehyde glue", including urea-formaldehyde resin adhesives, phenolic resin adhesives and melamine urea-formaldehyde resin adhesives; these adhesives will release formaldehyde gas during manufacture, use and finished panels , pollute the environment and endanger human health. [0003] The new PMDI (polymethylen...

Claims

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Application Information

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Patent Type & Authority Patents(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