Method for preparing plastic wood

A technology of plastic wood and thermoplastics, applied in the field of plastic wood, can solve the problems of slow progress in high-value utilization of recycled materials, difficult to popularize and apply, etc.

Inactive Publication Date: 2007-01-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-value utilization of a large amount of recycled materials is progressing slowly, such as compounding with new resins to form a 3-layer structure, monomerization of recycled materials, etc., are difficult to popularize and apply due to cost or technical reasons, and it is imperative to develop new related technologies

Method used

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  • Method for preparing plastic wood
  • Method for preparing plastic wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 4Kg of rice husk is heated and baked for one hour at a high temperature of about 150°C. Soak in 10% NaOH solution at 23°C for 48h to remove low-molecular impurities such as pectin, lignin, hemicellulose, and thermal decomposition products during heat treatment; then dry at 110°C for 5 hours to dry. Add 80 grams of benzoic acid, 50 grams of stearic acid, and 40 grams of silane coupling agent (A151) into the rice husks dried above. Add 6Kg recycled PET bottle flakes (polyethylene terephthalate) (from Zijiang Industry Group Bottle Company) and mix in a high-speed mixer at room temperature for 10 minutes, then add all the materials into a dehumidifier and dry at 110°C for 4 Extruded with a twin-screw extruder after 1 hour.

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[0036] Speed: 160rpm; Feeding speed: 30...

Embodiment 2

[0039] 4Kg of rice husk is heated and baked for one hour at a high temperature of about 150°C. Soak in 10% NaOH solution at 23°C for 48h to remove low-molecular impurities such as pectin, lignin, hemicellulose, and thermal decomposition products during heat treatment; then dry at 110°C for 5 hours to dry. Add 80 grams of glacial acetic acid, 50 grams of stearic acid, and 40 grams of silane coupling agent (A171) to the rice husks that have been dried above. Add 6Kg of polyethylene resin, mix in a high-speed mixer at room temperature for 10 minutes, put all the materials into a dehumidifying dryer, dehumidify and dry at 110°C for 4 hours, and then extrude with a twin-screw extruder.

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[0041] Rotational speed: 100rpm; feeding speed: 9rpm.

[0042] The extruded material is mol...

Embodiment 3

[0044] 4Kg of rice husk is heated and baked for one hour at a high temperature of about 150°C. Soak in 10% NaOH solution at 23°C for 48h to remove low-molecular impurities such as pectin, lignin, hemicellulose, and thermal decomposition products during heat treatment; then dry at 110°C for 5 hours dry. Add 80 grams of glacial acetic acid, 50 grams of stearic acid, and 40 grams of silane coupling agent (A171) to the rice husks that have been dried above. This batch of material is material 1.

[0045] 6Kg of polyethylene resin was dried in a vacuum drying oven at 110°C for 4 hours, and this material was material 2. Material 2 is fed in the feeding area of ​​the extruder far away from the die, and material 1 is fed in the feeding port (equivalent to the second heating section of the screw) that is closer to the die of the extruder. Extrude out of the machine.

[0046] number of segments

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One group...

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Abstract

The invention relates to a kind of method to produce plastic timber with paddy husk or rice bran. It makes recycling PET, Polyethylene, Polypropylene or PVC as main, and adds other auxiliary agents, after producing grains with double screw rod extruding machine, cast or press them to produce various profiled material. By using the technology, we can produce construction material like timber, which is called plastic timber here. It can be processed into various needed timber shapes, and has good process ability. Its performance is better than natural timber. Its most outstanding advantage is its biodegradation ability and reproducibility that are incomparable by other strengthening materials.

Description

technical field [0001] The invention relates to a method for preparing composite materials from plant fibers and thermoplastics, in particular to rice husk or rice bran, and recycled polyethylene terephthalate (PET) or polyethylene, polypropylene, polyvinyl chloride and other methods of producing a wood-like building material - "plastic lumber". [0002] This new technology can recycle all kinds of plastic products, such as milk bottles, mineral water bottles and other waste items, after sorting and sorting, they are cleaned and broken into crumbs, and then prepared into "plastic wood". It can be processed into various desired wood shapes, has good machinability like natural wood, does not absorb water, does not expand, resists corrosion, does not crack, impacts, and wears, and its performance is better than natural wood. Wood, suitable for places in direct contact with soil or water, non-rotten, insect-proof, no chemical substances penetrate into the surrounding soil, no pol...

Claims

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Application Information

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IPC IPC(8): C08L67/03C08L23/02C08L27/06C08K5/54B29C47/40
Inventor 郭卫红汤先文吴驰飞彭勇张喜亮李慧韩炜殷国蓉张洪生
Owner EAST CHINA UNIV OF SCI & TECH
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