Prepn process of polylactic acid-base thermoplastic wood-plastic composite material

A wood-plastic composite material and polylactic acid-based thermal technology, applied in the field of polymer processing, can solve the problems of limiting the development of wood-plastic materials, not being widely used, and limited types, etc., achieving broad application and industrialization prospects, excellent comprehensive performance, and increased The effect of new species

Inactive Publication Date: 2007-08-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermoplastics commonly used in the preparation of wood-plastic materials mainly include polyvinyl chloride (PVC) (CN200610034685.7), polyethylene (PE) (Fang Zhengping, China Plastics, 1999, 13 (11), 44; Wu Yuannan, Wu Jun , Journal of Beijing Institute of Graphic Communication, 2006, 15(5), 9; CN99111051.X), polypropylene (PP) (CN02104432.5), etc., the compatibility of wood flour and plastics is only for these types of materials , usually used in guardrails, outdoor road boards, brackets, etc. Although there are certain applications, the types are limited and the varieties are few, which limits the development of wood-plastic materials and prevents them from being widely used
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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The raw material components are by weight: 90 parts of polylactic acid, 5 parts of fruit shell powder, 1 part of styrene-maleic anhydride copolymer, 0.3 part of acrylate copolymer, 1 part of barium stearate, 1 part of zinc oxide, silicone oil 1.5 parts, 0.1 part of dibasic lead stearate, and 0.1 part of antioxidant 168.

[0019] First mix polylactic acid, fruit shell powder, styrene-maleic anhydride copolymer, acrylate copolymer, barium stearate, zinc oxide, silicone oil, dibasic lead stearate, and antioxidant 168 on a high-speed mixer Evenly, the speed of the high-speed mixer is 3000 rpm, and then the mixture is put into a twin-screw extruder to extrude into pellets, the screw temperature is 70 / 90 / 120 / 150 / 160 / 165 ° C, and the speed is 600 rpm, the residence time of the material in the screw is 0.5 minutes, after the extruded material is cooled, it is cut into pellets by a pelletizer to obtain pellets, and dried in a vacuum oven at 60°C for 48 hours to obtain excellent ...

Embodiment 2

[0021] The raw material components are by weight: 30 parts of polylactic acid, 65 parts of bamboo powder, 2 parts of titanate coupling agent, 0.5 part of N, N-diethylene stearic acid amide, 0.5 part of stearic acid, 0.5 part of whisker Parts, 0.5 parts of silicone, 0.3 parts of antioxidant 1010, 0.7 parts of antioxidant 264.

[0022]First mix polylactic acid, bamboo powder, titanate coupling agent, N, N-diethylene stearic acid amide, stearic acid, whiskers, silicone, antioxidant 1010, and antioxidant 264 on a high-speed mixer Evenly, the speed of the high-speed mixer is 8000 rpm, and then the mixture is put into a twin-screw extruder to extrude into pellets. The screw temperature is 160 / 180 / 200 / 220 / 240 / 235°C and the speed is 90 rpm, the residence time of the material in the screw is 15 minutes, after the extruded material is cooled, it is pelletized by a pelletizer to obtain pellets, and dried in a vacuum oven at 80°C for 24 hours to obtain excellent comprehensive properties a...

Embodiment 3

[0024] Raw material components by weight: 50 parts of polylactic acid, 30 parts of wood powder, 10 parts of ethylene-butyl acrylate copolymer, 3 parts of polyether modified polysiloxane, 2 parts of chlorinated paraffin, 1 part of wollastonite , 2 parts of oleic acid amide, 1 part of antioxidant 1098, 1 part of antioxidant 626.

[0025] First put polylactic acid, wood powder, ethylene-butyl acrylate copolymer, polyether modified polysiloxane, chlorinated paraffin, wollastonite, oleic acid amide, antioxidant 1098, antioxidant 626 on a high-speed mixer Mix evenly, the speed of the high-speed mixer is 6000 rpm, and then the mixture is put into a twin-screw extruder to extrude into pellets, the screw temperature is 160 / 180 / 200 / 200 / 200 / 205 °C, 300 rpm, the residence time of the material in the screw is 2 minutes. After the extruded material is cooled, it is cut into pellets by a pelletizer to obtain pellets, which are dried in a vacuum oven at 120°C for 5 hours to obtain excellent c...

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PUM

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Abstract

The present invention relates to preparation process of polylactic acid-base thermoplastic wood-plastic composite material, which is prepared with polylactic acid and wood powder as main materials, and through reacting and mixing with compatibilizing agent, brightening agent, plasticizer, nucleater, dispersant, stabilizer and other assistant in a high speed stirrer; extrusion pelletizing the mixture in a double screw extruder; cooling and cutting; and drying in a vacuum drier to obtain the polylactic acid-base thermoplastic wood-plastic composite material. The composite material of the present invention has excellent comprehensive performance, is degradable, and may be used as packing material, environment protecting material and decoration material.

Description

technical field [0001] The invention relates to a preparation method of a polylactic acid-based thermoplastic wood-plastic composite material. The prepared composite material can be used as packaging materials, environmental protection materials, decoration materials and the like. The invention belongs to the technical field of polymer processing. Background technique [0002] While synthetic polymer materials bring convenience to people's lives, most of the materials are derived from petroleum and cause energy shortages. In addition, since most synthetic polymers do not have the characteristics of biodegradation, they cause serious environmental pollution problems after being discarded. . The application of degradable polymer materials can fundamentally solve the problem of environmental pollution, so research in the field of biodegradable polymer materials has also become active. Among them, polylactic acid (PLA) is an aliphatic polyester polymer material with excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08K5/54B29C47/40B29C47/92B29B9/12C08L33/00C08L83/04C08K3/00C08K5/00B29C48/40B29C48/92
CPCB29C47/92B29C48/04B29C48/40
Inventor 王艳玲戚嵘嵘毛亚鹏李君刘林波
Owner SHANGHAI JIAO TONG UNIV
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