High-polylactic acid-content film and preparation method thereof

A polylactic acid, high-content technology, applied in the field of polylactic acid film and its preparation, can solve the problems of low polylactic acid content, high cost, poor market competitiveness, etc., and achieve the goal of reducing oil dependence, easy operation, and high processing efficiency Effect

Active Publication Date: 2017-03-22
JILIN COFCO BIOCHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The invention provides a high-content polylactic acid film and its preparation method to solve the problems of low polylactic acid content, high cost and poor market competitiveness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh the following raw materials:

[0032] After drying, 50 parts of polylactic acid, NatureWorks 4032D, mixed polylactic acid, poly-L-lactic acid accounts for 98.6%, poly-D-lactic acid 1.4%, and the number-average molecular weight of polylactic acid is 100,000 to 200,000;

[0033] 50 parts of polybutylene adipate terephthalate (PBAT);

[0034] 1 part tributyl citrate;

[0035] 0.1 part of isocyanate;

[0036] 0.1 part tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester;

[0037] 0.5 parts of ethylene bis stearamide;

[0038] Mix polylactic acid and PBAT first, then add other raw materials and mix evenly to obtain a mixed material; put the mixed material into a twin-screw extruder for melt blending, and the temperature of each zone of the equipment is 170°C, 175°C, 180°C ℃, 185°C, 190°C, 195°C, 190°C, then stretch and pelletize to obtain granular mixed resin; dewater and dry the granular mixed resin to obtain high-content polylactic acid ...

Embodiment 2

[0040] Weigh the following raw materials:

[0041] After drying, 57.5 parts of polylactic acid, NatureWorks 4032D, mixed polylactic acid, poly-L-lactic acid accounts for 98.6%, poly-D-lactic acid is 1.4%, and the number-average molecular weight of polylactic acid is 100,000 to 200,000;

[0042] 42.5 parts carbon dioxide copolymer (PPC);

[0043] 5.5 parts glycerin;

[0044] 1.0 parts hydrogen peroxide;

[0045] 2.0 parts of 2,6-di-tert-butyl-4-methylphenol;

[0046] 2.8 parts of oleic acid amide;

[0047] Mix polylactic acid and PPC first, then add other raw materials and mix evenly to obtain a mixed material; add the mixed material to a twin-screw extruder for melt blending, and the temperature of each zone of the equipment is 170°C, 175°C, 180°C ℃, 185°C, 190°C, 195°C, 190°C, then stretch and pelletize to obtain granular mixed resin; dewater and dry the granular mixed resin to obtain high-content polylactic acid film, after drying, Film blowing machine blown film, the s...

Embodiment 3

[0049] Weigh the following raw materials:

[0050] After drying, 65 parts of polylactic acid, NatureWorks 2003D, mixed polylactic acid, poly-L-lactic acid 95.75%, poly-D-lactic acid 4.25%, polylactic acid number average molecular weight 100,000-200,000;

[0051] 25 parts of polybutylene adipate terephthalate PBAT, 10 parts of carbon dioxide copolymer PPC;

[0052] 10 parts epoxidized soybean oil;

[0053] 2.0 parts of styrene-glycidyl acrylate;

[0054] 4 parts of tris[2,4-di-tert-butylphenyl]phosphite;

[0055] 5 parts erucamide;

[0056] Mix polylactic acid, PBAT, and PPC first, then add other raw materials and mix evenly to obtain a mixed material; add the mixed material to a twin-screw extruder for melt blending, and the temperature of each zone of the equipment is 170°C and 175°C in sequence , 180°C, 185°C, 190°C, 195°C, 190°C, then stretch and pelletize to obtain granular mixed resin; dewater and dry the granular mixed resin to obtain high-content polylactic acid fil...

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Abstract

The invention relates to a high-polylactic acid-content film and a preparation method thereof, belonging to the technical field of high-polymer materials. The high-polylactic acid-content film is prepared from the following raw materials in parts by weight: 50-65 parts of polylactic acid, 35-50 parts of toughener, 1-10 parts of plasticizer, 0.1-2 parts of chain extender, 0.1-4 parts of antioxidant and 0.5-5 parts of anti-block agent. The polylactic acid content is dominant in the film content and is higher than that in the existing film; and meanwhile, the raw material formula cost is lowered, and the market competitiveness is enhanced. The prepared film is completely biodegradable, and thus, is beneficial to environment protection.

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 is a kind of biodegradable resin. It is made of lactic acid as a monomer by polycondensation of lactic acid or ring-opening polymerization of lactic acid dimer-lactide. Polylactic acid has good biodegradability and can be composted under composting conditions. More than 80% can be degraded within 100 days. [0003] Traditional polymer materials use a large amount of non-renewable petroleum resources, and the waste seriously pollutes the environment. Polylactic acid (abbreviated as PLA) is a polymer with excellent biocompatibility and biodegradability. It is derived from renewable resource crops, such as corn, sweet potato, corn, and sweet potato. The starch is fermented to obtain lactic acid, lactic acid di The dimer-lactide is obtained by polymerization, and the lactide is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L69/00C08L91/00C08L25/14C08K5/11C08K5/134C08K5/20C08K5/053C08K5/14C08K5/13C08K5/526B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08J5/18C08J2367/02C08J2367/04C08L67/02C08L67/04C08L2201/06C08L2201/10C08L2203/16C08L2205/025C08L2205/03C08L2205/035C08K5/11C08K5/1345C08L69/00C08K5/053C08K5/14C08K5/13C08L91/00C08L25/14C08K5/526
Inventor 佟毅李义张会良边俊甲刘志刚白岚王文玲吴延东王金枝武丽达闫寒贾力耕
Owner JILIN COFCO BIOCHEM
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