Fully-biodegradable PLA/PBAT composite film and making method thereof

A composite film and butylene terephthalate technology, which is applied in the field of PLA/PBAT composite film and its preparation, can solve problems such as the degradation of polyester components, achieve good flexibility, improve compatibility, and simple preparation process Effect

Active Publication Date: 2014-02-19
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bisoxazoline chain extenders mainly show higher activity to -COOH, while epoxy chain extenders need to have higher reactivity at higher temperatures, but too high a temperature will cause polymerization The ester component is seriously degraded

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 7

[0040] The weight-average molecular weight of PBAT used in Example 7 was 25,000.

[0041] Mechanical property test: The tensile property test standard is ASTM D638, and the tensile speed is 50mm / min.

Embodiment 1

[0043] (1) Dry PLA (4032D) and PBAT in a blast oven at 80°C for 12 hours, and dry calcium carbonate in a blast oven at 105°C for 6 hours;

[0044] (2) Then take 90 parts of PLA, 10 parts of PBAT, 0.04 parts of 2,2'-bis(2-oxazoline), 2.4 parts of hexamethylene diisocyanate, 0.6 parts of calcium stearate, 0.1 parts of antioxidant 1010, 10 parts of calcium carbonate were mixed in a high mixer at room temperature for 5 minutes;

[0045] (3) Put the obtained mixture into a twin-screw machine for extrusion and granulation. The temperature of each zone of the twin-screw machine is: 150°C in the first zone, 160°C in the second zone, 160°C in the third zone, 170°C in the fourth zone, 170°C in the fifth zone, The sixth zone is 175°C, the head is 180°C; the screw speed is 200rpm, and the length-to-diameter ratio L / D=40 / 1;

[0046] (4) Dry the pellets obtained in step (3) in an air blast oven at 80°C for 12 hours;

[0047](5) Add the dried pellets in step (4) to the single-screw machine...

Embodiment 2

[0049] (1) Dry PLA (4032D) and PBAT in an oven at 80°C for 12 hours, and dry talcum powder in an oven at 110°C for 6 hours;

[0050] (2) Then take 60 parts of PLA, 40 parts of PBAT, 0.9 parts of 1,3-phenylene-bis(2-oxazoline), 0.04 parts of diphenylmethane diisocyanate, 0.3 parts of oleic acid amide, 0.1 parts of antioxidant Agent 1076, 20 parts of talcum powder were mixed in a high mixer at room temperature for 5 minutes;

[0051] (3) Put the obtained mixture into a twin-screw machine for extrusion and granulation. The temperature of each zone of the twin-screw machine is: 150°C in the first zone, 160°C in the second zone, 160°C in the third zone, 170°C in the fourth zone, 170°C in the fifth zone, The sixth zone is 175°C, the head is 180°C; the screw speed is 200rpm, and the length-to-diameter ratio L / D=40 / 1;

[0052] (4) Dry the pellets obtained in step (3) in an air blast oven at 80°C for 12 hours;

[0053] (5) Add the dried pellets in step (4) to the single-screw machine...

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PUM

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Abstract

The invention belongs to the technical field of high-molecular materials, and relates to a PLA/PBAT composite film and a making method thereof. The composite film is made by using the following components, by weight, 10-90 parts of polylactic acid, 10-90 parts of PBAT, 0.04-2.5 parts of a compatibilizer A, 0.04-2.5 parts of a compatibilizer B, 0-3 parts of a lubricant, 0-3 parts of an antioxidant and 1-50 parts of a filler. A blend provided by the invention has a very good flexibility, and the made film can be fully biodegraded, and can be widely used in the field of films.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a PLA / PBAT composite film and a preparation method thereof. Background technique [0002] The use of plastic film has penetrated into all areas of people's lives, and is widely used as food packaging, electronic and electrical product packaging, shopping bags, garbage bags, etc. The raw materials of traditional plastic film materials such as polypropylene (PP) film and polyethylene (PE) film are petroleum, which are difficult to degrade when discarded in nature after use, causing great harm to the environment. With the depletion of petroleum resources and the continuous enhancement of people's awareness of environmental protection, the development of fully degradable environmentally friendly polymer materials used in the field of thin film materials will become the mainstream of future development. [0003] Polylactic acid (PLA) is an aliphatic polyester formed by conver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08K13/06C08K5/098C08K5/353C08K5/29C08K3/26C08K3/34C08K3/36C08K3/30B29C47/92B29C48/92
CPCB29C48/08B29C48/04B29C48/397
Inventor 袁角亮
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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