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Novel wood flour and rice hull powder mixed type thermoplastic wood-plastic composite material and preparation method thereof

A wood-plastic composite material and thermoplastic technology are applied in the field of wood-plastic composite material and its preparation, new wood powder, rice husk powder mixed thermoplastic wood-plastic composite material and its preparation field, which can solve the problem of high consumption of wood and composite material processing performance. and poor mechanical properties, etc., to achieve the effect of increasing farmers' income, improving processing performance and mechanical properties, and high hardness

Inactive Publication Date: 2012-08-22
ANHUI RED FOREST NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These wood-plastic composite materials mainly rely on wood powder as the main raw material, which does not solve the problem of consuming a large amount of wood when using wood powder, and the addition of plastic components such as plastics leads to poor processability and mechanical properties of the composite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method comprises the following steps: 1) mixing: put 25-35% wood powder and 25-35% rice husk powder into a high-speed mixer, and add 2-5 % graft compatibilizer, 2-3% compound lubricant for high-speed mixing, when the temperature rises to 105-115 °C, add 20-35% high-density polyethylene, 0.2-0.5% antioxidant, 0.2-0.5 % UV absorber and 3-7% talcum powder, continue to mix at a high speed to 120-130 ° C and cool down in a cold mixer; 2) Granulation: pass the mixed and cooled material through a special granulator at 160-190 Pre-plasticized at ℃, through a special mold, rotating and cutting into particles of a certain diameter and length.

[0032] In the above composition, the graft compatibilizer is selected from polyolefin (PE, PP) grafted maleic anhydride, ethylene-vinyl acetate copolymer resin grafted maleic anhydride and polyolefin elastomer POE grafted maleic anhydride One or two or more compatibilizers are mixed in the obtained graft copolymer.

[003...

Embodiment 1

[0036]Put 30 parts of wood flour (80 mesh) and 30 parts of rice husk powder (80 mesh) into a high-speed mixer, and add polyolefin (PE, PP) grafted with maleic anhydride when the temperature is raised to 80-90°C under high-speed stirring. Mix 2 parts of graft compatibilizer for graft copolymer and 3 parts of wood-plastic composite lubricant at high speed, add 30 parts of high-density polyethylene, 0.5 part of 1010 antioxidant, BP12 ultraviolet absorber when the temperature rises to 105-115 °C Add 0.5 parts of agent and 6 parts of talcum powder, continue to mix at high speed to 120-130 ° C, and then cool down in a cold mixer. The mixed and cooled material is pre-plasticized at 160-190°C by a special granulator, and then cut into particles of a certain diameter and length by a special mold and rotating. The processed profiles have been inspected, and the bending failure load has reached 5078N.

Embodiment 2

[0038] Operation is with embodiment 1, gets 35 parts of wood flour (80 orders), 35 parts of rice husk powder (80 orders), the graft compatibilizer of the graft copolymer that ethylene-vinyl acetate copolymer resin grafts maleic anhydride to obtain 4 parts, 7 parts of wood-plastic composite lubricant, 35 parts of high-density polyethylene, 0.3 part of 1076 antioxidant, 0.3 part of 326 ultraviolet absorber and 5.4 parts of talcum powder. The processed profiles have been inspected, and the bending failure load has reached 5149N.

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Abstract

The invention discloses a novel wood flour and rice hull powder mixed type thermoplastic wood-plastic composite material and a preparation method of the composite material. The composite material is prepared by adopting wood flour, rice hull powder and HDPE (high-density polyethylene) resin in combination with certain surface conditioning agent and a processing auxiliary agent and utilizing the polymer interface chemistry principle and plastic filling modification characteristic through mixing in a high-speed mixer and granulating with a extruder. The processed sectional material takes inexpensive and rich rice hull powder as a main raw material, has appearance like wood, better dimensional stability than wood, no crack, warping or knot, higher hardness than plastic and good physical mechanical performance, can be re-processed by an universal wood processing method, and is waterproof, anti-corrosive, vermin-proof, aging-resistant, repeatedly recyclable and environment-friendly.

Description

technical field [0001] The invention relates to a wood-plastic composite material in the field of polymer materials and a preparation method thereof, and more specifically relates to a novel wood powder and rice husk powder mixed thermoplastic wood-plastic composite material and a preparation method thereof. Background technique [0002] Wood-plastic composite material (commonly known as WPC in the industry), also known as "plastic wood", "ecological wood" or "environmental wood", is based on primary biomass materials such as wood chips, and uses the principle of polymer interface chemistry and plastic filling to modify It is a reversible and recyclable basic material that is compounded with a certain proportion of plastic base materials and processed by a special process. Wooden materials include sawdust, wood shavings, bamboo chips, wheat straw, chaff, coconut shells, bagasse, peanut shells, hemp, etc. Plastics usually use PE, PP, PVC, PS and ABS, etc. Recycled plastics a...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/06C08K13/02C08K3/34
Inventor 林建国
Owner ANHUI RED FOREST NEW MATERIAL TECH
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