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Preparation method for regenerated wood plastic composite material

A composite material and regenerated wood technology, which is applied in the field of polymer material preparation, can solve the problems of great difference in toughness and wood, low rigidity, etc., and achieve the effects of alleviating the shortage of forest resources, improving compatibility and wide range of use.

Active Publication Date: 2014-11-19
YIWU SHENGHUA PRINTING
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] On the market, wood-plastic composite materials are mainly produced by mixing and modifying single polyolefin or PVC and wood powder. The disadvantage of wood-plastic composite materials is that PVC is used as a carrier. The toughness of the product is very different from that of wood. Although the wood-plastic composite material with polyolefin as the carrier solves the toughness problem of the product, the density of the product is much higher than that of wood, and the rigidity of the product is lower than that of wood.
Wood-plastic composite materials currently on the market are difficult to replace wood in the true sense

Method used

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  • Preparation method for regenerated wood plastic composite material
  • Preparation method for regenerated wood plastic composite material
  • Preparation method for regenerated wood plastic composite material

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preparation example Construction

[0049] A kind of preparation method of recycled wood-plastic composite material, described preparation method is carried out according to the following steps:

[0050] Preparation of base material for recycled wood-plastic composites

[0051] A Regenerated polyethylene is a mixture of recycled high-density polyethylene and recycled low-density polyethylene, the melt flow rate is 1.5-10g / 10min, the ash content is ≤5%, and the recycled polyethylene is dried in a dryer at a drying temperature of 110 °C to obtain regenerated polyethylene with a moisture content≤3%, and the dried regenerated polyethylene and maleic anhydride grafting agent are respectively by mass percentage:

[0052] Recycled polyethylene 95-98%

[0053] Maleic anhydride grafting agent 2~5%

[0054] Mix evenly at a high speed in a high-speed mixer, the mixing time is 5-10min, and the temperature is 90-100°C to obtain a recycled polyethylene mixture for use; the maleic anhydride grafting agent is PE-g-MAH, light ...

Embodiment 1

[0084] According to the above preparation method

[0085] Preparation of base material for recycled wood-plastic composites

[0086] A The melt flow rate of recycled polyethylene is 10g / 10min, and the ash content is ≤5%. Dry the recycled polyethylene in a dryer at a drying temperature of 110°C to obtain recycled polyethylene with a moisture content of ≤3%. Dry the recycled polyethylene Regenerated polyethylene and maleic anhydride grafting agent are respectively by mass percent:

[0087] Recycled Polyethylene 95%

[0088] Maleic anhydride grafting agent 5%

[0089] Mix evenly in a high-speed mixer at a high speed for 5 minutes at a temperature of 90°C to obtain a recycled polyethylene mixture for later use.

[0090] B The melt flow rate of recycled polypropylene is 1.5g / 10min, the ash content is ≤5%, the titanate coupling agent is NTC-131, and the recycled polypropylene is dried in a dryer at a drying temperature of 110°C to obtain moisture Content ≤ 3% recycled polypropyl...

Embodiment 2

[0119] According to the above preparation method

[0120] Preparation of base material for recycled wood-plastic composites

[0121]A The melt flow rate of recycled polyethylene is 1.5g / 10min, and the ash content is ≤5%. Dry the recycled polyethylene in a dryer at a drying temperature of 110°C to obtain recycled polyethylene with a moisture content of ≤3%. After drying, The regenerated polyethylene and maleic anhydride grafting agent are respectively by mass percent:

[0122] Recycled Polyethylene 98%

[0123] Maleic anhydride grafting agent 2%

[0124] Mix evenly at high speed in a high-speed mixer, the mixing time is 10min, and the temperature is 100°C to obtain a recycled polyethylene mixture, which is set aside.

[0125] B The melt flow rate of recycled polypropylene is 10g / 10min, the ash content is ≤5%, the titanate coupling agent is NTC-132, and the recycled polypropylene is dried in a dryer at a drying temperature of 110°C to obtain the moisture content ≤3% recycled...

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Abstract

The invention relates to a preparation method for a regenerated wood plastic composite material, and belongs to the technical field of macromolecular material preparation. The preparation method comprises the steps: pretreating regenerated polyethylene, regenerated polypropylene and PVC, carrying out co-mixing modification with styrene butadiene rubber, POE and a superfine talc powder to prepare a basic material of the wood plastic composite material, then compositing with modified wood flour, and preparing the regenerated wood plastic composite material. The selected regenerated polyethylene and regenerated polypropylene are both regenerated recycled materials, and the utilization value of the regenerated plastics is effectively improved; with deep processing utilization of the wood flour, recycling reutilization of the biomass material is realized, and the ecological environment is protected. The regenerated wood plastic composite material prepared by the composite modification technology has the characteristics of light weight, high rigidity, high toughness and recyclability; and the product after forming and processing is more lignified, and has more superior performance and wider use scope than wood plastic products modified by single polyolefin or PVC and wood flour.

Description

technical field [0001] The invention relates to a preparation method of a recycled wood-plastic composite material, which belongs to the technical field of polymer material preparation. Background technique [0002] my country is a large agricultural country, but also a country with poor forest resources. In real life, the demand for wood products is huge. At present, the actual use of wood in my country is more than 320 million cubic meters, of which the gap has reached more than 140 million cubic meters. In the process of wood processing, 20%-30% of wood powder and leftover materials are not effectively utilized and are discarded; in agricultural production, a large amount of biomass materials are incinerated, which not only wastes a lot of resources, but also brings harm to the ecological environment. Here comes serious pollution. Wood-plastic products can not only replace wood very well, alleviate the shortage of forest resources, increase forest carbon sinks, and redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L51/06C08L27/06C08L23/12C08L9/06C08L23/08C08K3/34C08F255/02
Inventor 徐小环陈建平刘欣
Owner YIWU SHENGHUA PRINTING
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