Full-degradable injection product and preparation method therefor

An injection molding product, fully degradable technology, applied in the field of fully degradable composite materials, can solve the problems of polybutylene succinate compatibility price difference, poor heat resistance of polylactic acid, and restrictions on popularization and application, and achieve short heat treatment time, The effect of low production cost and simple process flow

Inactive Publication Date: 2016-06-01
东莞市恒丰高新技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid has poor heat resistance and low impact resistance, and polybutylene succinate has poor compatibility, so the promotion and application of both are limited.

Method used

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  • Full-degradable injection product and preparation method therefor
  • Full-degradable injection product and preparation method therefor
  • Full-degradable injection product and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] By weight, the above 32 parts of polylactic acid, 30 parts of polybutylene succinate, 15 parts of bamboo fiber, 15 parts of ramie fiber, 5 parts of sebacic acid dibenzohydrazide nucleating agent, 1 part of acetyl citrate three Butyl ester plasticizer, 1 part of sodium hydroxide alkali treatment agent, 0.5 part of triglycidyl isocyanurate crosslinking agent and 0.5 part of dibasic lead stearate heat stabilizer raw materials are put into the high mixer according to the above ratio 5min; put the mixed raw materials into a twin-screw extruder for granulation, the length-to-diameter ratio of the screw is 1:42, the screw speed is 400rpm, and the heating temperature of each section of the screw is 150°C, 165°C, 175°C, 185°C, 170°C , 160°C; Put the prepared pellets into the injection molding machine, according to the required product mold, injection molding, the heating temperature of the screw of the injection molding machine is 160°C, and the pressure is 45Mpa; the injection m...

Embodiment 2～4

[0031] Process is identical with embodiment 1, and difference is the performance of formula, preparation condition and gained product, as shown in table 1 respectively:

[0032] Table 1

[0033]

[0034] Generally, its tensile strength of existing polylactic acid product is all lower than 40MPa, and elongation at break is in the scope of 5~10%, and heat distortion temperature is lower than 80 ℃, and can find out from Table 1: the present invention prepares The tensile strength, elongation at break and heat distortion temperature of the fully degradable injection molding product polylactic acid are all greater than the existing polylactic acid, that is to say, the fully degradable polylactic acid prepared by the present invention ensures its degradability. , also has excellent toughness and heat resistance.

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Abstract

The invention relates to the technical field of full-degradable composite materials, in particular to a full-degradable injection product. The full-degradable injection product comprises the following raw materials in percentage by weight: 20-40% of polylactic acid, 20-40% of polybutylene succinate, 10-20% of bamboo fibers, 10-20% of ramine fibers, 4-8% of a nucleating agent, 0.5-2% of a plasticizer and 0.5-2% of an alkali treating agent. Various components are reasonably combined; and especially the alkali treating agent is added, so that the product is improved in elongation, flexibility and physical and mechanical properties while keeping good biodegradability and compatibility. In addition, the invention provides a preparation method for the full-degradable injection product. the preparation method comprises the steps of preparing the raw materials in proportion, weighing the raw materials and mixing the raw materials in a high mixing machine; granulating the mixed raw materials in a double-screw extruder; putting the formed granules into an injection machine and performing injection forming by a required product mould; and performing secondary heating on an injection product in a drying tunnel furnace. The technological process is simple, the heat treatment time is short, the machining performance is good, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of fully degradable composite materials, in particular to a fully degradable injection molding product and a preparation method thereof. Background technique [0002] With the increasing population and the shortage of resources and energy on the earth, environmental pollution has become an urgent concern for all human beings. While enjoying the convenience brought by modern technology, we should also be aware of the urgent environmental crisis that mankind is about to face. Green chemistry is the most basic scientific method to realize pollution prevention and has extremely important social and economic significance. Today's world is the era of pursuing energy saving and environmental protection, and degradable plastics have undoubtedly become green products that are concerned at home and abroad. [0003] Both polylactic acid and polybutylene succinate are aliphatic polyester polymer materials with good bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L97/02C08L1/02C08K13/02C08K3/22B29C47/92B29C48/92
CPCC08L67/04B29C48/92B29C2948/92704C08L67/02C08L2201/06C08L2201/08C08L2205/02C08L2205/035C08L2205/16C08L97/02C08L1/02C08K13/02C08K3/22
Inventor 姚振全
Owner 东莞市恒丰高新技术开发有限公司
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