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High-toughness transparent polylactic acid film and preparing method thereof

A technology of polylactic acid and high toughness, which is applied in the field of high toughness transparent polylactic acid film and its preparation, can solve the problems of high toughening agent cost, unfavorable material comprehensive cost, and destruction of the full degradation characteristics of polylactic acid, so as to achieve good processing performance, The effect of reducing production cost and improving flexibility

Active Publication Date: 2015-01-28
WEIHAI GONGDA PLASTIC CEMENT CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of the toughening agent synthesized by this method is relatively high, and its modified polylactic acid is not conducive to reducing the overall cost of materials, so its application is limited; patent CN101392092B provides a polyether-b-amide thermoplastic elastomer toughener Tough modified polylactic acid material, in this method, the full degradation characteristics of polylactic acid are destroyed because the thermoplastic elastomer is not degradable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh the first monomer gluconolactone and the second monomer citric acid in the polycondensation reactor, feed nitrogen into the reactor, replace the air in the reactor, and raise the temperature of the reactor to 170°C. React at this temperature for 2 hours; then add the third monomer lactic acid into the reactor, continue the reaction for 2 hours, and end the reaction to obtain the product polyester multi-polymer, which is the required toughening agent, for subsequent use; wherein the amount of raw material The ratio of the first monomer: the second monomer: the third monomer = 1:1:1.

[0032] Polylactic acid PLA (produced by NatureWorks, USA, 4032D) was dried in a blast oven at 60 °C for 24 h.

[0033] Take 97 parts of PLA, 3 parts of the toughening agent synthesized above, 0.1 part of antioxidant 1010, and 0.3 parts of antioxidant 168 and mix them in a high mixer at room temperature for 5 minutes.

[0034] The obtained mixture is added to a twin-screw machine for ...

Embodiment 2

[0036] Weigh the first monomer pentaerythritol and the second monomer citric acid in the polycondensation reactor, feed nitrogen into the reactor, replace the air in the reactor, and raise the temperature of the reactor to 180°C. Then react for 2.5 hours; then add the third monomer lactide into the reaction kettle, continue the reaction for 3 hours, and end the reaction to obtain the product polyester multi-polymer, which is the required toughening agent, for subsequent use; wherein the amount of raw material The ratio of the first monomer: the second monomer: the third monomer = 1:1.5:1.5.

[0037] Polylactic acid PLA (produced by NatureWorks, USA, 3051D) was dried in a forced air oven at 80 °C for 6 h.

[0038] Take 95 parts of PLA, 5 parts of the toughening agent synthesized above, 0.3 parts of antioxidant 1076, and 0.3 parts of antioxidant 168 and mix them in a high mixer at room temperature for 5 minutes.

[0039]The obtained mixture is added to a twin-screw machine for ...

Embodiment 3

[0041] Weigh the first monomer gluconolactone and the second monomer citric acid in the polycondensation reactor, feed nitrogen into the reactor, replace the air in the reactor, and raise the temperature of the reactor to 160°C. React at this temperature for 3 hours; then add the third monomer lactide into the reaction kettle, continue the reaction for 4 hours, and end the reaction to obtain the product polyester multi-polymer, which is the required toughening agent, for subsequent use; the raw material The ratio of the amount of the first monomer: the second monomer: the third monomer = 1:2:2.

[0042] Polylactic acid PLA (produced by NatureWorks, USA, 3051D) was dried in a forced air oven at 80 °C for 6 h.

[0043] Take 85 parts of PLA, 15 parts of the toughening agent synthesized above, and 0.1 part of antioxidant 1010 in a high mixer at room temperature and mix for 5 minutes.

[0044] The obtained mixture is added to a twin-screw machine for extrusion and granulation, and...

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Abstract

The invention relates to the field of high polymer materials, in particular to a high-toughness transparent polylactic acid film and a preparing method thereof. The high-toughness transparent polylactic acid film comprises, by weight, 97-85 parts of polylactic acid, 3-15 parts of flexibilizer and 0.1-0.6 part of heat stabilizer. The polylactic acid is dried, and the materials, by weight, of 97-85 parts of polylactic acid, 3-15 parts of flexibilizer and 0.1-0.6 part of heat stabilizer are weighed according to the ratio and are added to a highly-mixing machine to be mixed at the normal temperature and at a high speed for 5-10 min; the materials which are evenly mixed in the second step are added to a double-screw extruder to be melted and blended, and modified particles are extruded; the modified particles obtained in the third step are extruded out through a single screw and are blown to form a film through a film blowing machine, and the high-toughness transparent polylactic acid film is obtained.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-toughness transparent polylactic acid film and a preparation method thereof. [0002] Background technique [0003] As we all know, with the rapid development of the national economy, the use of polymer materials has penetrated into all areas of people's lives, bringing great convenience to our lives, especially plastic film materials, which are widely used. However, traditional plastic film materials are mainly prepared from petroleum-based materials, such as polypropylene and polyethylene. Thin film materials made of such materials are difficult to degrade when discarded in nature after use, leading to serious environmental pollution problems. With the increasing shortage of petroleum resources, people's high attention to environmental issues and the improvement of life quality requirements, the development of fully biodegradable polymer film materials has become a res...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/00C08K5/134C08K5/526C08G63/00B29C55/28
Inventor 袁角亮孙波
Owner WEIHAI GONGDA PLASTIC CEMENT CHEM CO LTD
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