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Preparation method of resin impregnated wood powder filled wood-plastic composite material

A wood-plastic composite material and resin impregnation technology, which is applied in the direction of impregnating wood, wood treatment, wood impregnation, etc., can solve the problems affecting the quality of wood-plastic boards, etc., and achieve the effect of improving impregnation effect, improving mechanical properties, and improving compatibility

Pending Publication Date: 2022-01-07
ANHUI SENTAI WPC TECH FLOOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this also affects the quality of wood-plastic panels to a certain extent.

Method used

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  • Preparation method of resin impregnated wood powder filled wood-plastic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method for resin-impregnated modified wood powder filled wood-plastic composite material, comprising the following steps:

[0041] a) Provide wood powder; it is produced from wood processing waste with a superfine pulverizer, passing through 80 meshes;

[0042] b) Immerse the wood powder in water-based phenolic resin emulsion, the degree of polymerization of the phenolic resin is 2-50, the average weight molecular weight is not more than 6000, and the solid content is about 30wt%; after soaking, take it out and dry to obtain impregnated wood powder ;

[0043] c), mixing and granulating the impregnated wood powder and HDPE at a mass ratio of 2:1 to obtain modified wood-plastic masterbatch;

[0044] d) Melt the modified wood-plastic masterbatch, processing aid calcium stearate (0.5% dosage) and superfine calcium carbonate filler (10.0% dosage) with an extruder equipped with a wood-plastic extrusion die Extrude to form a slab, and after the slab is cooled a...

Embodiment 2

[0046] A preparation method for resin-impregnated modified wood powder filled wood-plastic composite material, comprising the following steps:

[0047] a) Provide wood powder; it is produced from wood processing waste with a superfine pulverizer, passing through 80 meshes;

[0048] b) The wood powder is pretreated with lye. During the pretreatment process, the lye contains 20vol% ethanol in addition to caustic soda, an alkaline substance; and then the wood powder is impregnated in water-based phenolic resin In the emulsion, the degree of polymerization of the phenolic resin is 2 to 50, the average weight molecular weight is not more than 6000, and the solid content is about 30wt%. The impregnation described in this step adopts vacuum pressure impregnation, and the wood powder is first placed in a vacuum impregnation tank for extraction. Vacuum, then inject the water-based phenolic resin emulsion, take it out after soaking, and dry to obtain impregnated wood powder; when vacuum...

Embodiment 3

[0052] A preparation method for resin-impregnated modified wood powder filled wood-plastic composite material, comprising the following steps:

[0053] a) Provide wood powder; it is obtained from wood processing waste with a superfine pulverizer, passing through 80 meshes; then ball milling, passing through 200 meshes;

[0054] b) The wood powder is pretreated with lye. During the pretreatment process, the lye contains 20vol% ethanol in addition to caustic soda, an alkaline substance; and then the wood powder is impregnated in water-based phenolic resin In the emulsion, the degree of polymerization of the phenolic resin is 2 to 50, the average weight molecular weight is not more than 6000, and the solid content is about 30wt%. The impregnation described in this step adopts vacuum pressure impregnation, and the wood powder is first placed in a vacuum impregnation tank for extraction. vacuum, then inject the water-based phenolic resin emulsion, take it out after soaking, and dry...

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Abstract

The invention relates to a preparation method of a resin impregnated wood powder filled wood-plastic composite material, and belongs to the technical field of wood-plastic materials. The preparation method of the resin impregnated modified wood flour filled wood-plastic composite material. The method comprises the following steps: a) providing wood flour; b) impregnating wood powder in the dispersion liquid of the low molecular weight resin to obtain impregnated wood powder; c) mixing and granulating the impregnated wood powder and polymer resin to obtain modified wood-plastic master batch; and d) extruding the modified wood-plastic master batch by using a plastic extruding machine to prepare the resin impregnated modified wood powder filled wood-plastic composite material. According to the invention, the wood powder is firstly subjected to plasticizing modification by impregnating the wood powder with the low-molecular-weight resin, so that not only can the hydrophobicity of the wood powder be improved, but also the compatibility of the wood powder and the resin can be remarkably improved; and the effect of uniform mixing under a microscopic condition can be achieved by a high-speed mixer, and the mechanical property of the wood-plastic composite board in a humid environment is improved.

Description

technical field [0001] The invention relates to a method for preparing a resin-impregnated wood powder filled wood-plastic composite material, which belongs to the technical field of wood-plastic materials. Background technique [0002] The wood powder used for wood-plastic production is usually directly extruded as wood-plastic raw material after drying and dehydration. Because the compatibility of wood flour and plastics is not very good, the existing technology usually first mixes at high speed with a high-speed mixer, then turns to low-speed mixing, and then granulates; finally use the wood-plastic masterbatch made in Extrusion from an extruder loaded with a die. [0003] And in order to make wood-plastic products closer to wood, the filling ratio of wood powder is very high, up to 60%-70%. For example, the Chinese invention patent document whose authorized announcement number is CN 103265768B discloses a production method of wood-plastic flooring. This method selects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08H8/00B27K3/15B27K3/02B27K3/08
CPCC08L97/02C08H8/00B27K3/153B27K3/15B27K3/0207B27K3/08C08L2207/062B27K2200/15B27K2240/70C08L23/06
Inventor 唐道远邓梦德
Owner ANHUI SENTAI WPC TECH FLOOR CO LTD