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Polylactic acid resin composition

A technology of polylactic acid resin and composition, which is applied in the field of polylactic acid resin composition, can solve the problems of high price, brittle material performance, and inability to prepare film packaging materials, etc., and achieve the effect of low cost and good flexibility

Inactive Publication Date: 2005-09-28
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polylactic acid resin is a new type of fully biodegradable plastic. Its raw material comes from corn, which is polymerized by fermentation, so it is also called corn plastic. Biodegradable plastics, the biggest problem in the application of polylactic acid resin at present is that the price is high, and the material performance is relatively brittle, so it cannot be used to prepare film packaging materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] According to 85 grams of polylactic acid resin, 15 grams of glycerol triacetate, and 0.1 gram of EBS, carry out the formula, melt and mix for 5 minutes in a double-roller mill, and the plasticizing temperature is 160 ° C, and the material after plasticizing is pressed in a hydraulic press to form 1.5mm flakes, the pressing temperature is 180°C; the plasticized polylactic acid obtained by pressing is tested for mechanical properties and migration. The obtained results: the tensile strength was 36.2MPa, the elongation at break was 206%, and the migration amount after 50 hours at 80°C was 1.32%.

Embodiment 2

[0017] According to the formula of 80 grams of polylactic acid resin, 20 grams of glycerol triacetate, and 0.1 grams of oleic acid amide, melt and mix for 5 minutes in a double-roller mill, and the plasticizing temperature is 160 ° C. Put the plasticized material in a hydraulic press Press into a 1.5mm sheet at a pressing temperature of 180°C; the plasticized polylactic acid obtained by pressing is subjected to mechanical property tests and migration tests. The obtained results: the tensile strength was 27.6MPa, the elongation at break was 388%, and the migration amount after 50 hours at 80°C was 3.46%.

Embodiment 3

[0019] According to the formula of 75 grams of polylactic acid resin, 25 grams of glycerol triacetate, and 0.1 grams of oleic acid amide, melt and mix in a double-roller mill for 5 minutes, and the plasticizing temperature is 160 ° C. Put the plasticized material in a hydraulic press Press into a 1.5mm sheet at a pressing temperature of 180°C; the plasticized polylactic acid obtained by pressing is subjected to mechanical property tests and migration tests. The obtained results: the tensile strength was 22.3MPa, the elongation at break was 421%, and the migration amount after 50 hours at 80°C was 5.12%.

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Abstract

The present invention relates to one kind of polylactic acid resin composition. The polylactic acid resin composition consists of polylactic acid resin 50-85 wt%, glycecol triacetate 15-50 wt% and lubricant 0.01-1 wt%. The plasticized polylactic acid resin composition is especially suitable for making polylactic acid film, and has the features of low cost, high toughness, high tear resistance and high transparency.

Description

(1) Technical field [0001] The invention relates to a polylactic acid resin composition. (2) Background technology [0002] Polylactic acid resin is a new type of fully biodegradable plastic. Its raw material comes from corn, which is polymerized by fermentation, so it is also called corn plastic. Biodegradable plastics, the biggest problem in the application of polylactic acid resin at present is that the price is relatively high, and the second is that the material performance is relatively brittle, and film packaging materials cannot be prepared. For biodegradable plastics, disposable film packaging materials are the main fields of application. Chinese patent 03117482 increases the toughness of the polylactic acid film by adding 2-15% medical plasticizer, which is used for the growth and regeneration of soft and hard tissues in cleft palate repair. (3) Contents of the invention [0003] The purpose of the present invention is to provide a polylactic acid resin composi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/11C08L67/04
Inventor 钱欣
Owner ZHEJIANG UNIV OF TECH
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