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Biological whole degrading film and mfg. process of its material

A manufacturing method and fully degradable technology, applied in the manufacture of biodegradable materials or molded products, and the manufacture of biodegradable films and their materials. Effect

Inactive Publication Date: 2007-07-18
刘津平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this polymer and the membranes and agricultural membranes produced therefrom have the disadvantage of not being too flexible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] According to weight percentages, 45-85% of polylactic acid with a weight average molecular weight greater than 9000, 10-50% of aliphatic polyester with a weight average molecular weight greater than 9000, 0-30% plasticizer and 0-10% auxiliary After the mixing device is uniformly mixed, after the twin-screw extruder reaches the set temperature and screw speed, it is continuously added to the feed port of the machine, or they are directly metered and continuously added to the machine without mixing through the mixing device. The feed port of the twin-screw extruder is driven by the twin-screw rotation of the twin-screw extruder. After the entire raw material system is mixed, plasticized, melted and homogenized under the action of the screw rotation, it has at least one round, oval, square or rectangular shape. The head of the cross-section channel is extruded and pelletized, cut into strips or sliced ​​into materials suitable for manufacturing biodegradable films, or is direc...

Embodiment approach 2( Embodiment 1

[0032] Put 15 kilograms of polylactic acid with a weight average molecular weight of 157,200, 9 kilograms of polyester amide with a weight average molecular weight of 137,200, and 3.5 kilograms of sorbitol into the high-speed mixer at a speed of 2000 revolutions per minute. After mixing for 7 minutes, the output is continuously fed to In the feeding port of the twin-screw extruder (Germany JP Industrial Technology Equipment Co., Ltd., model JSK26, screw length-to-diameter ratio: 35), the entire system is mixed, plasticized, melted and homogenized under the action of the screw rotation. The die head of the circular channel leaves the extruder and is cut into cylindrical pellets in air cooling. The temperature of the feeding port (zone 1) is 30℃, the working temperature of other zones is 150-220℃, and the temperature of the machine head is 190℃.

[0033] Embodiment 3 (Example 2):

[0034] Put 10 kilograms of polylactic acid with a weight average molecular weight of 157,200, 8 kilogram...

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PUM

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Abstract

The present invention discloses continuous production process of flexible biodegradable material and film with excellent heat resistance, low stickness and isotropic tear resistance. The production process is completed in a screw extruder mainly with the materials including polylactic acid, aliphatic polyester, plasticizer and assistant.

Description

Technical field [0001] The invention belongs to the field of biodegradable material manufacturing and molding, and relates to a manufacturing method of biodegradable materials or molded products, and in particular to a manufacturing method of a fully biodegradable film and its materials. Background technique [0002] my country produces tens of millions of tons of traditional chemical plastic products every year, a considerable part of which are agricultural mulch films, vest bags, lunch boxes, disposable tableware, etc. These products cannot be degraded after hundreds of years and are called "white pollution" that harms the environment. Therefore, in recent years, people have paid attention to the development of fully biodegradable thermoplastics, such as various polyesters produced from microorganisms or chemical synthesis. In daily life, these degradable plastics can be used to make food packaging bags, packaging boxes, beverage bottles, daily chemical packaging bottles, ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L67/04C08K5/29B32B27/36B29C47/92C08L67/02C08K3/00B29C48/92
CPCB29C47/92
Inventor 刘津平
Owner 刘津平
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