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Polylactic acid ternary blended modified film and preparation method thereof

A polylactic acid ternary, blending modification technology, applied in the field of polymer materials, can solve the problems of falling dart impact strength, poor heat sealing stability, low elongation at break, etc., achieve great economic and social significance, improve melt Strength and impact strength, the effect of improving performance defects

Inactive Publication Date: 2019-04-02
JILIN COFCO BIOCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a polylactic acid ternary blending modified film and a preparation method thereof to solve the problems of low elongation at break, poor dart impact strength and heat sealing stability of film bags with a polylactic acid content of 50% to 65%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Get the raw material of following weight portion:

[0024] Polylactic acid PLA 50 parts,

[0025] Polybutylene adipate terephthalate PBAT 40 parts,

[0026] Maleic anhydride functionalized ethylene octene copolymer elastomer POE-g-MAH 8.9 parts,

[0027] 0.5 parts of tributyl citrate,

[0028] 0.1 part of isocyanate,

[0029] 0.5 parts of ethylene bis stearamide;

[0030] The preparation method comprises the steps of:

[0031] Mix polylactic acid PLA, polybutylene adipate terephthalate PBAT, maleic anhydride functionalized ethylene octene copolymer elastomer POE-g-MAH first, then add other raw materials and mix evenly to obtain mixed materials; the mixed materials are added to a twin-screw extrusion granulator for melt blending, and the temperature of each zone of the equipment is 185°C, 190°C, 195°C, 200°C, 205°C, 200°C, 200°C, and then pulled Strips and pellets to obtain granular mixed resin; the granular mixed resin is dewatered and dried to obtain a ternary bl...

Embodiment 2

[0034] Get the raw material of following weight portion:

[0035] Polylactic acid PLA 55 parts,

[0036] Polybutylene adipate terephthalate PBAT 37.3 parts,

[0037] Maleic anhydride functionalized ethylene octene copolymer elastomer POE-g-MAH 5 parts,

[0038] 0.7 parts of epoxidized soybean oil,

[0039] 0.5 parts of styrene-acrylic acid-glycidyl methacrylate,

[0040] 1.5 parts of erucamide.

[0041] The preparation method is the same as in Example 1.

Embodiment 3

[0043] Get the raw material of following weight portion:

[0044] Polylactic acid PLA 57.5 parts,

[0045] Polybutylene adipate terephthalate PBAT 32.5 parts,

[0046] Maleic anhydride functionalized ethylene octene copolymer elastomer POE-g-MAH 7.3 parts,

[0047] 0.8 parts of tributyl citrate,

[0048] 0.6 part of isocyanate,

[0049] 1.3 parts of ethylene bis stearamide.

[0050] The preparation method is the same as in Example 1.

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PUM

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Abstract

The invention relates to a polylactic acid ternary blended modified film and a preparation method thereof, belonging to the field of polymer materials. The polylactic acid ternary blended modified film is prepared from the following raw materials by weight: 50 to 65 parts of polylactic acid, 25 to 40 parts of a toughening agent namely polybutylene adipate-co-terephthalate, 5 to 8.9 parts of a maleic anhydride functionalized ethylene-octene copolymer elastomer, 0.5 to 1 part of a plasticizer, 0.1 to 1 part of a chain extender and 0.5 to 2 parts of an opening agent. The polylactic acid ternary blended modified film provided by the invention has the following advantages: the problem of poor stability of heat sealing performance of a product is solved; and the use requirements of the product in the field of packaging is guaranteed. Industrialization of polylactic acid facilitates the demands of long-term development of energy and material resources; deep processing of agricultural productsis promoted; dependence on petroleum is reduced; white pollution is solved; the development of the novel environmental protection material industry is promoted; and great economic and social significance are achieved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polylactic acid film and a preparation method thereof. Background technique [0002] Polylactic acid, also known as polylactide, belongs to the family of polyesters. It mainly uses corn and cassava as raw materials, which are abundant and renewable. The production process of polylactic acid is pollution-free, has good biocompatibility, and can be completely biodegraded to generate CO 2 and H 2 O, therefore, is an ideal green polymer material. [0003] Polylactic acid film products currently on the market are mainly PLA and PBAT binary blend systems. When the PLA content in the formula system is 50%, the film has low elongation at break, poor dart impact strength and weather resistance, and is only suitable for bread. , clothes and other packaging, the application field is limited. [0004] The film bag with 50% polylactic acid content has poor heat sealing stability on the...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L51/06C08L91/00C08L25/14C08K5/11C08K5/29C08K5/20C08J5/18
CPCC08J5/18C08J2367/04C08J2425/14C08J2451/06C08J2467/02C08J2491/00C08K5/11C08K5/20C08K5/29
Inventor 李义张会良边俊甲刘志刚郝艳平颜祥禹王文玲肖洋唐明勋
Owner JILIN COFCO BIOCHEM
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