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High-heat-resistance polylactic acid/wood powder composite material

A technology of composite materials and polylactic acid, which is applied in the field of polymers, can solve the problems of restricting large-scale use and high polymerization costs, and achieve good dimensional stability, enhanced heat resistance, and reduced production costs.

Inactive Publication Date: 2016-07-06
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional polyolefin materials, polylactic acid (PLA) is derived from renewable resources and is a non-toxic polyester polymer with good biodegradability and processability, but it is limited due to its high polymerization cost. its large-scale use

Method used

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Embodiment Construction

[0013] The main raw material is polylactic acid resin particles, the characteristic density is 1.20g / cm 3 The mesh number of the wood flour is 80 mesh poplar wood flour; the compatibilizer uses the purchased silane coupling agent; the auxiliary agent includes a high temperature resistant antioxidant; the heat resistant agent is triglycidyl isocyanurate. Twin-screw extruder barrel temperature Zone 1 temperature: 130~135 0 C, the temperature in the second zone is 140~145 0 C, the temperature in the third zone is 140~145 0 C, the temperature in the four zones is 140~145 0 C, the temperature in five zones is 150~155 0 C, the temperature in the six zones is 145~150 0 C. The pressure is 10-14MPa, the length-to-diameter ratio of the screw is 35-40, and the speed of the host is 90-100r / min. The components are uniformly mixed according to the ratio and placed in a twin-screw extruder, melted, mixed, extruded and granulated.

[0014] The modified heat-resistant polylactic acid / woo...

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Abstract

The invention relates to a high-heat-resistance polylactic acid / wood powder composite material and a preparation method thereof. The material is an environment-friendly recyclable polylactic acid / wood powder composite material. A technical process for preparing the composite material is innovative in that: a polylactic acid material is reinforced by filling with a complex of wood powder and a coupling agent; the heat resistance of the polylactic acid composite material is improved with triglycidyl isocyanurate; the wood powder / polylactic acid composite material is subjected to blending extrusion with a double-screw extruder; and traction, cooling and pelletizing are conducted, the modified high-heat-resistance polylactic acid / wood powder composite material is obtained. In the field of recyclable trays and packing boxes, compared with traditional materials, the high-heat-resistance polylactic acid / wood powder composite material has high rigidity and high toughness, and has relatively high dimensional stability and heat resistance.

Description

technical field [0001] The invention relates to the field of macromolecules, in particular to a high heat-resistant polylactic acid / wood powder composite material and a preparation method thereof, which are mainly applied to recyclable pallets and packing boxes. Background technique [0002] Wood-plastic composite material is a new type of material with great development potential, such as polyethylene, polyvinyl chloride, and polypropylene-based wood-plastic composite materials. The market share of wood-plastic composite materials is increasing year by year. Compared with traditional polyolefin materials, polylactic acid (PLA) is derived from renewable resources and is a non-toxic polyester polymer with good biodegradability and processability, but it is limited due to its high polymerization cost. its large-scale use. Therefore, reducing the use cost of PLA has become the focus of research. By adding hemp, kenaf, etc., it has become a major way to improve the performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08K5/3492B29C47/92B29C48/92
Inventor 刘申黄志鹏代汝军
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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