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Method for manufacturing polylactic acid film through one step

A polylactic acid and film technology, applied in the field of one-step preparation of polylactic acid films, can solve the problems of increasing the preparation cost of polylactic acid films, increasing the number of polylactic acid processing times of polylactic acid films, and degrading performance, thereby eliminating multiple processing procedures, The effect of reducing the processing cost and reducing the number of processing steps

Active Publication Date: 2015-09-23
WEIHAI LIANGAN ENVIRONMENTAL PROTECTION NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Decreased performance due to high susceptibility to degradation of polylactic acid during processing
The preparation of polylactic acid film by two-step method increases the number of processing times of polylactic acid, on the one hand, it is easy to degrade polylactic acid and reduce its performance; on the other hand, it increases the preparation cost of polylactic acid film

Method used

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  • Method for manufacturing polylactic acid film through one step

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The polylactic acid melt obtained after the polymerization in the polylactic acid polymerization reaction device 1 is continuously output through the high-pressure melt delivery metering pump 2, and the melt is continuously input through the delivery pipeline 5 and the delivery pipeline 7 with heating and heat preservation functions. In the mixing device 8, at the same time, the toughening agent melt polymerized in the toughening agent polymerization reaction device 3 is continuously output by the high-pressure melt delivery metering pump 4, and passed through the delivery pipeline 6 with heating and heat preservation functions. In the melt mixing device 8 that is continuously input into the delivery pipeline 7, the mass ratio of the polylactic acid melt and the toughening agent melt is controlled to be 97:3, and the polylactic acid and the toughening agent are mixed uniformly by the melt mixing device 8 to obtain a toughening agent. Toughened modified polylactic acid me...

Embodiment 2

[0029] The polylactic acid melt obtained after the polymerization in the polylactic acid polymerization reaction device 1 is continuously output through the high-pressure melt delivery metering pump 2, and the melt is continuously input through the delivery pipeline 5 and the delivery pipeline 7 with heating and heat preservation functions. In the mixing device 8, at the same time, the toughening agent melt polymerized in the toughening agent polymerization reaction device 3 is continuously output by the high-pressure melt delivery metering pump 4, and passed through the delivery pipeline 6 with heating and heat preservation functions. In the continuous input melt mixing device 8 with the delivery pipeline 7, the mass ratio of the polylactic acid melt and the toughening agent melt is controlled to be 85:15, and the polylactic acid and the toughening agent are mixed uniformly by the melt mixing device 8 to obtain a toughening agent. Toughened modified polylactic acid melt, and t...

Embodiment 3

[0032]The polylactic acid melt obtained after the polymerization in the polylactic acid polymerization reaction device 1 is continuously output through the high-pressure melt delivery metering pump 2, and the melt is continuously input through the delivery pipeline 5 and the delivery pipeline 7 with heating and heat preservation functions. In the mixing device 8, at the same time, the toughening agent melt polymerized in the toughening agent polymerization reaction device 3 is continuously output by the high-pressure melt delivery metering pump 4, and passed through the delivery pipeline 6 with heating and heat preservation functions. In the melt mixing device 8 that is continuously input into the delivery pipeline 7, the mass ratio of the polylactic acid melt and the toughening agent melt is controlled to be 90:10, and the polylactic acid and the toughening agent are mixed uniformly by the melt mixing device 8 to obtain a toughening agent. Toughened modified polylactic acid me...

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Abstract

The invention relates to a method for manufacturing a polylactic acid film through one step, and belongs to the field of high polymer materials. The method is characterized in that polylactic acid melt obtained after polymerization in a polylactic acid polymerization reaction device is finished is continuously output by a high-pressure melt conveying metering pump and continuously input into a melt mixing device through conveying pipelines with a heating function and a heat preservation function; meanwhile, flexibilizer melt obtained through polymerization in a flexibilizer polymerization reaction device is continuously output through a high-pressure melt conveying metering pump and continuously input into the melt mixing device through conveying pipelines with a heating function and a heat preservation function; polylactic acid and flexibilizer are evenly mixed through the melt mixing device, and toughened and modified polylactic acid melt is obtained; the toughened and modified polylactic acid melt is continuously input into a film blowing machine through a conveying pipeline with a heating function and a heat preservation function, film blowing is carried out on the toughened and modified polylactic acid melt through the film blowing machine, and a polylactic acid film product is obtained.

Description

technical field [0001] The invention relates to the field of preparation of polymer materials, in particular to a method for preparing a polylactic acid film in one step. Background technique [0002] With the rapid development of the national economy, the use of polymer materials has penetrated into all areas of people's lives, bringing great convenience to our lives, especially plastic film materials, which are widely used. However, traditional plastic film materials are mainly prepared from petroleum-based materials, such as polypropylene and polyethylene. Thin film materials made of such materials are difficult to degrade when discarded in nature after use, leading to serious environmental pollution problems. With the increasing shortage of petroleum resources, people's high attention to environmental issues and the improvement of life quality requirements, the development of fully biodegradable polymer materials has become a research hotspot at home and abroad. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/28B29B7/82B29B7/90
Inventor 袁角亮孙波
Owner WEIHAI LIANGAN ENVIRONMENTAL PROTECTION NEW MATERIAL TECH CO LTD
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