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Appearance wood-like wood-plastic composite material and its preparing method

A wood-plastic composite material and appearance technology, which is applied to the wood-plastic composite material with a wood-like appearance and its preparation field, can solve the problems of poor woody appearance, poor imitation wood effect, high cost, etc., and achieve the effect of simple and easy method

Inactive Publication Date: 2007-03-28
HANGZHOU NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in the existing wood-plastic composite material preparation technology, such as: poor woody appearance and poor wood imitation effect; high cost, which affects the popularization and use of this new material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) Preparation of premix: Dry 100-mesh Chinese fir powder in a high-efficiency fluidized dryer. The inlet temperature of the hot air in the dryer is 130° C., and the drying time is 15 minutes. The wood powder is dried until the water content is lower than 0.5%. Add 200 parts of dried wood powder, 75 parts of calcium carbonate, 25 parts of talcum powder, 7 parts of iron-based pigment iron brown, 5 parts of phthalate coupling agent or silane coupling agent into the high-speed mixer, and mix at high speed to 150 ℃, after cooling to 100℃, add 100 parts of recovered PP, then add 15 parts of MAH-g-PP, 0.5 parts of light stabilizer, 0.5 parts of antioxidant, 0.5 parts of secondary antioxidant, and appropriate amount of lubricant, at 100 ~110°C and mix evenly to obtain a premix.

[0015] 2) Preparation of pulverized material: Add the premixed material into the domestic co-rotating parallel twin-screw extruder for mastication and extrusion, and set the temperature of each sectio...

Embodiment 2

[0019] Dry the 60-mesh poplar wood powder in the airflow dryer, the inlet temperature of the hot air in the dryer is about 210°C, and the outlet temperature is about 100°C, and the wood powder is dried until the water content is lower than 0.6%.

[0020] Add 150 parts of dried wood powder, 35 parts of calcium carbonate, 15 parts of talc powder, 5 parts of iron pigment iron yellow, 4 parts of phthalate coupling agent or silane coupling agent into a high-speed mixer, and mix at a high speed to 150 ℃, after cooling to 100℃, add 90 parts of recycled PP, 10 parts of recycled PE, then add 10 parts of MAH-g-PP, appropriate amount of stabilizer, flame retardant, lubricant, etc., mix well at 100-110℃, get the premix;

[0021] Put the premixed material into the co-rotating parallel twin-screw extruder for masticating and extruding, and the temperature of the barrel is set at 160-190 °C; the extruded product is cooled by air, pulverized by a pulverizer, and pulverized material is obtaine...

Embodiment 3

[0025] Add 130 parts of 100-mesh poplar wood powder, 20 parts of calcium carbonate, 10 parts of talcum powder, and 5 parts of iron-based pigment iron orange into a high-speed mixer, mix at a high speed to 150°C, open the cover at this temperature to exhaust steam several times, and cool After reaching 100°C, add 80 parts of recycled PP, 20 parts of recycled PE, and then add 15 parts of MAH-g-PP, appropriate amount of stabilizer, flame retardant, lubricant, etc., and mix evenly at 100-110°C to obtain a premixed material;

[0026] Put the premixed material into the co-rotating parallel twin-screw extruder for plasticizing and extruding, and set the temperature of the barrel at 160-190 °C; the extruded product is cooled by air, pulverized by a pulverizer, and pulverized material is obtained;

[0027] Put the pulverized material into a conical twin-screw extruder for extrusion, and set the barrel temperature at 160-180°C. The extrudate is molded, cooled by air or water, and cut t...

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Abstract

The present invention relates to a wood-plastics composite material whose appearance is similar to that of wood and its preparation method. It is made up by using plant fibre powder and thermoplastic plastics as raw material, adding proper quantity of additive through the processes of uniformly mixing, extruding, plasticizing and moulding. It is characterized by that its surface possess the grain similar to wood grain.

Description

technical field [0001] The invention relates to a wood-plastic composite material and a preparation method thereof, in particular to a wood-plastic composite material with a wood-like appearance and a preparation method thereof. Background technique [0002] Wood-plastic composite materials can be sawed, planed, and nailed like wood, and can be painted (or directly extruded into a beautiful surface); on the other hand, various properties of wood-plastic composite materials are superior to wood, such as: no Moth-eaten, mold-free, corrosion-resistant, non-absorbent, non-toxic, formaldehyde-free, etc.; and wood-plastic composite products can be 100% recycled and reused like thermoplastics, and the production process is pollution-free. It is a green and environmentally friendly material. Therefore, it has received extensive attention and developed rapidly in recent years. However, there are still many deficiencies in the existing wood-plastic composite material preparation tech...

Claims

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Application Information

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IPC IPC(8): B29C47/00B24B21/00B29C47/40
Inventor 吕群王华彤
Owner HANGZHOU NORMAL UNIVERSITY
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