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Completely-biodegradable blown film as well as preparation method and application of completely-biodegradable blown film

A biodegradable and blown film technology, applied in applications, other household appliances, chemical instruments and methods, etc., can solve problems such as increasing the nucleation speed of PLA and hindering the crystallization behavior of PLA

Active Publication Date: 2019-01-11
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Worasak Phetwarotai et al reported the blending of PLA, PBAT, nucleating agent talc (Talc) and compatibilizer diphenylmethane diisocyanate (MDI) in the journal Journal of Thermal Analysis and Calorimetry (2016,126:1797-1808.) And blown into film, the ratio of PLA / PBAT / Talc / MDI (phr / phr / phr / phr) is 100 / 0 / 0 / 0, 90 / 10 / 0 / 0, 90 / 10 / 1 / 0 respectively , 90 / 10 / 1 / 1, 90 / 10 / 1 / 3, 90 / 10 / 1 / 5, 90 / 10 / 1 / 7, the results show that talc is a good nucleating agent for PLA, Talc and PBAT Adding greatly increases the nucleation speed of PLA, but the addition of compatibilizer MDI and the formation of more long-chain compounds will hinder the crystallization behavior of PLA

Method used

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  • Completely-biodegradable blown film as well as preparation method and application of completely-biodegradable blown film
  • Completely-biodegradable blown film as well as preparation method and application of completely-biodegradable blown film

Examples

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preparation example Construction

[0054] The present invention provides a method for preparing a fully biodegradable blown film described in the above technical solution, comprising the following steps:

[0055] 10-25 parts of polylactic acid, 61.8-88.95 parts of polyterephthalic acid-adipate-butylene glycol ester, 0.1-2 parts of compatibilizer, 0.1-5 parts of plasticizer, and 0.1-3 parts of nucleating agent , 0.05-0.2 parts of chain extender, 0.1-1 part of anti-blocking agent and 0.2-2 parts of carbon black are mixed, melted, extruded and granulated to obtain the inner layer resin;

[0056] 10-25 parts of polylactic acid, 52.8-83.25 parts of polyterephthalic acid-adipate-butylene glycol ester, 0.1-2 parts of compatibilizer, 0.1-5 parts of plasticizer, 0.1-2 parts of lubricant, 0.05-0.2 parts of chain extender and 6-12 parts of titanium dioxide are mixed, melted, extruded and granulated to obtain middle layer resin;

[0057] 15-30 parts of polylactic acid, 53.8-82.65 parts of polyterephthalic acid-adipate-but...

Embodiment 1

[0075] The present invention provides a completely biodegradable film, the composition and mass parts ratio of the formula are as follows:

[0076] Inner layer resin: 20 parts of PLA; 71.25 parts of PBAT; 0.6 parts of carbon black; 2 parts of compatibilizer GMS; 2 parts of plasticizer ATBC; 1 part of lubricant EBS; 2 parts of nucleating agent talcum powder.

[0077] Weigh PLA, PBAT, carbon black, GMS, ATBC, EA, EBS, ADR and talcum powder according to the above formula, carry out mechanical blending of each component for 5 minutes, put the mixed raw materials into the twin-screw extruder, extrude The conditions for granulation are: the set temperature of the twin-screw extruder is: Zone 1: 120-140 °C, Zone 2: 150-170 °C, Zone 3: 160-180 °C, Zone 4: 170-190 °C, Zone 5: 170~190℃, Zone 6: 170~190℃, Zone 7: 170~190℃, Zone 8: 170~190℃, Head: 170~190℃, Screw speed: 100~300rpm.

[0078] Middle layer resin: 20 parts of PLA; 64.95 parts of PBAT; 10 parts of titanium dioxide; 1 part of...

Embodiment 2

[0094] The present invention provides a completely biodegradable film, the composition and mass parts ratio of the formula are as follows:

[0095] Inner layer resin: 10 parts of PLA; 81.9 parts of PBAT; 0.6 parts of carbon black; 1 part of compatibilizer GMS; 2 parts of plasticizer ATBC; 1 part of lubricant EBS; 2.4 parts of nucleating agent talcum powder.

[0096] Middle layer resin: 10 parts of PLA; 74.9 parts of PBAT; 10 parts of titanium dioxide; 1 part of compatibilizer GMS; 3 parts of plasticizer ATBC; 1 part of lubricant EBS; 0.1 part of chain extender 4368 type ADR.

[0097] Outer resin: 15 parts of PLA; 76.3 parts of PBAT; 4 parts of titanium dioxide; 0.5 parts of compatibilizer GMS; 3 parts of plasticizer ATBC; 1 part of lubricant EBS; 0.2 parts of chain extender 4368 type ADR.

[0098] The mixing and processing conditions of the inner, middle and outer layers of blown film resin are the same as in Example 1.

[0099] The set temperature of the film blowing machin...

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Abstract

The invention provides a completely-biodegradable blown film as well as a preparation method and application of the completely-biodegradable blown film. The film comprises an inner layer, a middle layer and an outer layer which are in contact in sequence; based on parts by weight, the inner layer comprises polylactic acid, poly(terephthalic acid)-adipic acid-butylene glycol ester, talcum powder, an antiblocking agent and carbon black; each of the middle layer and the outer layer comprises polylactic acid, poly(terephthalic acid)-adipic acid-butylene glycol ester and titanium dioxide; and eachof the three layers further comprises glycerol monooctadecanoate, acetyl tributyl citrate, ethylene bisstearamide and a chain extender; the antiblocking agent is erucylamide or oleamide; and the chainextender is a copolymer of styrene-acrylic acid-propylene oxide methacrylate and / or a copolymer of styrene-maleic anhydride-propylene oxide methacrylate. The film has relatively high tensile elongation at break, pendulum impact strength, tensile strength, Young modulus and heat sealing strength and keeps complete biodegradability.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a completely biodegradable blown film, its preparation method and its application. Background technique [0002] Unlike traditional petroleum-based plastics, polybutylene terephthalate-adipate (PBAT) is an aliphatic aromatic copolyester made from petroleum-based resources and consists of two comonomers, one One is a rigid BT segment (butylene terephthalate) composed of terephthalic acid and 1,4-butanediol monomers, and the other is a flexible BA segment (butylene adipate) composed of adipic Acid and 1,4-butanediol monomers. PBAT has both the degradability of aliphatic polyester and the good mechanical properties of aromatic polyester. [0003] Polylactic acid (PLA) is polymerized from lactic acid fermented from plant starch. It is a renewable resource and has biodegradable properties, which is of great significance to the protection of the environment. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/20B32B27/28B32B27/36B32B33/00C08L67/02C08L67/04C08J5/18B29B9/06B29C55/28
CPCB29B9/06B29C55/28B29L2007/008B29L2009/00B32B27/08B32B27/20B32B27/28B32B27/36B32B33/00B32B2250/24B32B2307/54C08J5/18C08J2367/02C08J2467/04
Inventor 张会良边俊甲杨佳金宝昌贾世玲杨慧丽韩立晶董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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