Fully biodegradable plastic film and preparation method thereof

A plastic film and all-biological technology, which is applied in the field of fully biodegradable plastic film and its preparation, can solve the problems of difficult to obtain mechanical property mixtures, poor compatibility of PLA starch, etc., to reduce material costs, improve comprehensive performance, and high mechanical properties Effect

Inactive Publication Date: 2020-10-30
JIANGXI GREEN ECO MFG RESOURCE CYCLE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, to propose a fully biodegradable plastic film and its preparation method, to solve the problem of poor compatibility of PLA, PBAT and starch in the prior art, and the difficulty of obtaining a mixture with better mechanical properties by simple blending question

Method used

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  • Fully biodegradable plastic film and preparation method thereof
  • Fully biodegradable plastic film and preparation method thereof
  • Fully biodegradable plastic film and preparation method thereof

Examples

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preparation example Construction

[0028] see figure 1 , the second aspect of the present invention provides a kind of preparation method of fully biodegradable plastic film, comprises the steps:

[0029] S1: Mix PBAT, PLA, thermoplastic starch, chain extender, antioxidant, hydroxyapatite and diisocyanate uniformly with a high-speed mixer to obtain a mixture. Wherein, the stirring speed of the high-speed mixer is 500-1000 r / min, and the stirring time is 5-20 minutes.

[0030] S2: adding the mixture to a twin-screw extruder for kneading and granulation to obtain blow molding material particles. Among them, the twin-screw extruder is preferably parallel to the twin-screw extruder, the temperature of the 1-10 zones of the twin-screw extruder is 145-155°C, the main engine speed is 100-150r / min, and the feeding speed is 1-150°C. 4r / min.

[0031] S3: Add the blow molding material particles to the blow molding machine to blow the film to obtain a fully biodegradable plastic film. Among them, the temperature of the...

Embodiment 1

[0038] Embodiment 1 provides a kind of fully biodegradable plastic film, and the weight percent of its component is as follows:

[0039]

[0040]

[0041] The preparation method of this fully biodegradable plastic film comprises the following steps:

[0042] (1) Weigh PBAT, PLA, thermoplastic starch, chain extender ADR4468, antioxidant 1010, hydroxyapatite and IPDI according to the above formula, and mix them uniformly with a high-speed mixer to obtain a mixture. Wherein, the stirring speed of the high-speed mixer is 1000r / min, and the stirring time is 10min.

[0043] (2) Add the above mixture into a parallel twin-screw extruder for kneading and granulation to obtain blow molding material particles. Among them, the temperature of zones 1 to 10 of the twin-screw extruder is 150°C, the speed of the main machine is 120r / min, and the speed of feeding is 2r / min.

[0044] (3) Add the above-mentioned blow molding material particles into the hopper of the blow molding machine to...

Embodiment 2

[0046] Embodiment 2 provides a kind of fully biodegradable plastic film, and the weight percent of its component is as follows:

[0047]

[0048] The preparation method of this fully biodegradable plastic film comprises the following steps:

[0049] (1) Weigh PBAT, PLA, thermoplastic starch, chain extender ADR4468, antioxidant 1010, hydroxyapatite and IPDI according to the above formula, and mix them uniformly with a high-speed mixer to obtain a mixture. Wherein, the stirring speed of the high-speed mixer is 1000r / min, and the stirring time is 10min.

[0050] (2) Add the above mixture into a parallel twin-screw extruder for kneading and granulation to obtain blow molding material particles. Among them, the temperature of zones 1 to 10 of the twin-screw extruder is 150°C, the speed of the main machine is 120r / min, and the speed of feeding is 2r / min.

[0051] (3) Add the above-mentioned blow molding material particles into the hopper of the blow molding machine to blow the ...

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Abstract

The invention discloses a fully biodegradable plastic film and a preparation method thereof. The fully biodegradable plastic film comprises the following components in percentage by weight: 45-75% ofPBAT, 5-15% of PLA, 10-40% of thermoplastic starch, 0.1-1% of a chain extender, 0.1-2% of an antioxidant, 1-15% of hydroxyapatite and 0.1-2% of diisocyanate. According to the invention, the thermoplastic starch is adopted to replace native starch, so that the dispersity of the starch can be remarkably improved, and a film with higher mechanical properties is obtained while the material cost is greatly reduced; and by selecting diisocyanate as a compatibilizer and hydroxyapatite as a reinforcing agent, the effects of organic reactive compatibilization and toughening, inorganic particle reinforcement and crystallization promotion can be combined, and the comprehensive performance of the film is further improved due to the synergistic effect of diisocyanate and hydroxyapatite.

Description

technical field [0001] The invention relates to the technical field of fully biodegradable plastics, in particular to a fully biodegradable plastic film and a preparation method thereof. Background technique [0002] Plastic film has been widely used in various fields of production and life because of its light weight, low price, strong mechanical properties, good water resistance, and convenient use. However, its environmental problems cannot be ignored. With the increase of people's awareness of environmental protection, it is the general trend to develop fully biodegradable plastic film products to improve the living environment of human beings. [0003] Polylactic acid (PLA) is an aliphatic polyester obtained by converting starch extracted from renewable plant resources such as corn and potatoes into glucose, which is then fermented into lactic acid, and then further polymerized. PLA has good biocompatibility and high strength, and can be completely biodegradable. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L3/02C08K13/02C08K3/32C08K5/29C08J5/18
CPCC08J5/18C08J2367/02C08J2467/04C08J2403/02C08K13/02C08K5/29C08K2201/005C08K2003/325B29B7/7461B29B9/06B29B9/12B29B7/92B29B7/007B29B7/826B29B7/48
Inventor 许开华吕怀兴秦玉飞李坤王圣权张云河鲁习金牛远航刘玉清刘锐何超超
Owner JIANGXI GREEN ECO MFG RESOURCE CYCLE
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