High-barrier-property biodegradable mulching film and preparation method thereof

A technology of degrading mulch film and high barrier property, applied in the field of polymer materials, can solve problems such as insufficient tensile strength and water retention performance, and achieve the effects of easy industrialization, high production efficiency, and good mechanical properties.

Inactive Publication Date: 2016-10-26
JILIN COFCO BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a high-barrier biodegradable mulch film and its preparation method to solve the problems of insufficient tensile strength and water retention performance of the degradable mulch film

Method used

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  • High-barrier-property biodegradable mulching film and preparation method thereof
  • High-barrier-property biodegradable mulching film and preparation method thereof
  • High-barrier-property biodegradable mulching film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] It is made from the following raw materials in parts by weight:

[0031]

[0032]

[0033] (1) earlier polylactic acid resin PLA, polybutylene adipate terephthalate PBAT, polypropylene carbonate resin PPC are mixed with a low-speed mixer, crystallized and dried to prepare mixture 1; Add ultraviolet absorber bis-sebacate, chain extender ADR-4368, antioxidant tetraerythritol ester, and erucamide into the feeder for stirring and mixing, and then mixture 2 can be obtained; finally, mixtures 1 and 2 are added to Melting and blending in the twin-screw extruder, the temperature in each zone of the twin-screw granulation system is 160°C, 200°C, 200°C, 200°C, 200°C, 195°C, 195°C, 195°C, 195°C, 180°C, 170°C, 170°C, after underwater pelletizing, dehydration, and screening to obtain granular resin composite materials, dry at 50°C to remove excess water, and the selected twin-screw extruder has a screw length-to-diameter ratio of 50:1. Keep airtight to prevent moisture;

[0...

Embodiment 2

[0037] Made from the following raw materials in parts by weight:

[0038]

[0039] (1) earlier polylactic acid resin PLA, polybutylene adipate terephthalate PBAT, polypropylene carbonate resin PPC are mixed with a low-speed mixer, crystallized and dried to prepare mixture 1; Add ultraviolet absorber bis-sebacate, chain extender ADR-4368, antioxidant tetraerythritol ester, and erucamide into the feeder for stirring and mixing, and then mixture 2 can be obtained; finally, mixtures 1 and 2 are added to Melting and blending in the twin-screw extruder, the temperature in each zone of the twin-screw granulation system is 160°C, 200°C, 200°C, 200°C, 200°C, 195°C, 195°C, 195°C, 195°C, 180°C, 170°C, 170°C, after underwater pelletizing, dehydration, and screening to obtain granular resin composite materials, dry at 55°C to remove excess water, and the selected twin-screw extruder has a screw length-to-diameter ratio of 50:1. Keep airtight to prevent moisture;

[0040] (2) Film blow...

Embodiment 3

[0043] Made from the following ingredients by weight:

[0044]

[0045](1) earlier polylactic acid resin PLA, polybutylene adipate terephthalate PBAT, polypropylene carbonate resin PPC are mixed with a low-speed mixer, crystallized and dried to prepare mixture 1; Add ultraviolet absorber bis-sebacate, chain extender ADR-4368, antioxidant tetraerythritol ester, and erucamide into the feeder for stirring and mixing, and then mixture 2 can be obtained; finally, mixtures 1 and 2 are added to Melting and blending in the twin-screw extruder, the temperature in each zone of the twin-screw granulation system is 160°C, 200°C, 200°C, 200°C, 200°C, 195°C, 195°C, 195°C, 195°C, 180°C, 170°C, 170°C, after underwater pelletizing, dehydration, and screening to obtain granular resin composite materials, dry at 60°C to remove excess water, and the selected twin-screw extruder has a screw length-to-diameter ratio of 50:1. Keep airtight to prevent moisture;

[0046] (2) Film blowing: film bl...

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Abstract

The invention relates to a high-barrier-property biodegradable mulching film and a preparation method thereof, belonging to the field of high-polymer materials. The high-barrier-property biodegradable mulching film is prepared from a polylactic acid resin, a toughener, a heat stabilizer, an ultraviolet absorbent, a chain extender, an antioxidant, an opening agent and the like by using a film blowing machine set. The high-barrier-property biodegradable mulching film can be automatically degraded under the actions of rich oxygen and microbes, does not pollute the environment, has higher barrier property than the LDPE (low-density polyethylene) film with the same thickness by 1.5-2.0 times, and satisfies the functions of moisture retention, water preservation and yield increase for crops. The method has the advantages of simple production technique and high production efficiency, and can easily implement industrial production.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a biodegradable plastic film and a preparation method thereof. Background technique [0002] The construction of industrialization of fully biodegradable polymer materials has been developed in recent years for resources and the environment. As far as the industry as a whole is concerned, it is still in its infancy. [0003] Due to the inherent characteristics of traditional petroleum-based materials that are difficult to degrade, when they are made into mulch, the soil remains for a long time, and soil compaction seriously affects the growth of crops, resulting in reduced production. [0004] Agricultural mulch film is an important means of production in modern agricultural production. It not only has the functions of moisturizing, water retention, fertilizer retention, pest control, and weed control, but also can maintain soil moisture, improve water use efficiency, improve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L69/00C08K5/00B29C55/28
CPCC08L67/02B29C55/28C08J5/18C08J2367/02C08J2367/04C08J2369/00C08J2467/02C08J2467/04C08J2469/00C08K2201/011C08L67/04C08L69/00C08L2201/06C08L2201/14C08L2203/16C08L2205/02C08L2205/03C08L2205/035
Inventor 佟毅李义吴延东白岚叶新建刘志刚关阳王金枝武丽达房亮武英娜
Owner JILIN COFCO BIOCHEM
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