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Wood powder-polyvinyl chloride compound material and preparation method thereof

A composite material and polyvinyl chloride technology, which is applied in the field of wood-plastic composite materials, can solve the problems of low addition of plant fibers and high cost of wood-plastic materials, improve interface compatibility, overcome insufficiency and fear of insects, reduce The effect of production costs

Inactive Publication Date: 2011-01-12
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of the prior art that the plant fiber and the resin interface are difficult to be compatible with the two phases, and the plant fiber addition is not high, which causes the high cost of wood-plastic materials, and provides a low-cost, high-performance wood powder polychloride. Ethylene composite material and its preparation method

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The wood-plastic composite material of this embodiment, its formula is: the content of wood flour is 50wt%, the content of polyvinyl chloride resin is 50wt%, the content of calcium carbonate 6wt%, the content of stearic acid is 2.5wt%, silane coupling The content of the agent is 8 wt% of the wood flour content.

[0011] Preparation method: (1) Wood powder pretreatment: crush wood processing waste into 80-mesh wood powder on a grinder, and dry in an oven at 65°C for 48 hours until the water content is 4.8 wt%. Put the powder in a high-mixer, adjust the speed to 40r / min, pour in the silane coupling agent, and stir for 5 minutes; (2) Polyvinyl chloride resin treatment: put polyvinyl chloride resin, calcium carbonate, and stearic acid in a high-mixer In the machine, set the temperature at 70°C, the speed at 50r / min, and mix for 30min; (3) Extrusion molding: set the temperature of the screw extruder at 140-185°C; mix the polyvinyl chloride resin and calcium carbonate obtaine...

Embodiment 2

[0014] The wood-plastic composite material of this embodiment, its formula is: the content of wood flour is 65wt%, the content of polyvinyl chloride resin is 35wt%, calcium carbonate 8%, the content of stearic acid is 2.5%, the content of silane coupling agent 10 wt % of the wood flour content.

[0015] Preparation method: (1) Wood powder pretreatment: crush the wood waste into a particle size of 80 mesh on a grinder, and dry it in an oven at 65°C for 48 hours until the water content is 4.6%; put the dried wood powder in In the high mixer, adjust the rotation speed to 40r / min, pour the silane coupling agent and stir for 5 minutes; (2) Polyvinyl chloride resin treatment: put polyvinyl chloride resin, calcium carbonate, and stearic acid in the high mixer, Set the temperature to 70°C, the speed to 50r / min, and mix for 30 minutes; (3) Extrusion granulation: set the temperature of the screw extruder to 140-185°C; mix the polyvinyl chloride resin, calcium carbonate, hard The mixtur...

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Abstract

The invention provides a wood powder-polyvinyl chloride compound material and a preparation method thereof. The wood powder-polyvinyl chloride compound material comprises the following raw materials in percentage by weight: 50 to 70 percent of wood powder serving as a base material, 20 to 50 percent of polyvinyl chloride resin, 5 to 10 percent of calcium carbonate and 2 to 5 percent of stearic acid, and the silane coupling agent is 1 to 10 percent based on the content of the wood powder. The invention also provides a method for preparing the wood powder-polyvinyl chloride compound material. The wood powder content of the wood powder-polyvinyl chloride compound material is high, and the production cost is greatly lowered; not only the advantages of wood on processing property are kept, but also the defect that the wood is easily damaged by worms is overcome, so that the wood powder-polyvinyl chloride compound material can replace the wood packaging material and matting material, and also be applicable for decorative boards, floors and anti-corrosive work sheds, passages, racks, casting models, and the like in chemical engineering industry.

Description

technical field [0001] The invention relates to a wood-plastic composite material, in particular to a wood powder polyvinyl chloride composite material and a preparation method thereof. Background technique [0002] Existing composite wood, such as composite flooring, etc. are all made of multiple pieces of wood directly added to the binder, and its cost is relatively high; moreover, the binder used often contains formaldehyde; it causes environmental pollution; it also has serious consequences for human health. At present, some people are studying plant fiber wood-plastic composite materials; however, due to the different surface properties of plant fiber and resin matrix, the interface bonding effect is poor when the two are combined, which leads to the reduction of various properties of the composite material and affects the composite material. Widespread application of materials. On the other hand, due to the poor compatibility between the fiber and the plastic matrix, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L27/06C08K13/02C08K3/26C08K5/09B29C47/92B29B9/06B29C48/92
CPCB29C48/92B29C2948/92704B29C2948/92895
Inventor 曾广胜孟聪
Owner HUNAN UNIV OF TECH
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