Preparation method for two-way stretched polylactic acid fiber porous membrane

A polylactic acid fiber, biaxial stretching technology, applied in the direction of fabric elongation, heating/cooling fabric, non-woven fabric, etc., to achieve the effect of smooth surface, good biodegradability, porosity and thickness controllable

Active Publication Date: 2016-08-10
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are few reports on the technology of making polylactic acid film with porous structure without adding porogen. The existing biaxially stretched polylactic acid film has the problem of controlling the pore size and thickness of the film. Therefore, it is necessary to develop low-cost, environmentally friendly polylactic acid porous membrane preparation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A method for preparing a biaxially stretched polylactic acid fiber porous membrane comprises preparing a polylactic acid nonwoven fabric fiber membrane from the prepared polylactic acid nonwoven fabric fiber web, biaxially stretching once, hot rolling twice, Secondary biaxial stretching, three times of hot rolling, and heat setting, wherein the polylactic acid non-woven fiber web used is prepared by the preparation process in the literature of the Chinese Patent Publication No. CN103726220A or CN101851830A.

[0026] The preparation method proceeds as follows:

[0027] a Polylactic acid non-woven fiber membrane preparation

[0028] The prepared polylactic acid fiber web is hot-rolled once using a flat hot rolling mill or a bachelor hot rolling mill to obtain a uniform and dense polylactic acid non-woven fiber membrane, wherein the thickness of the polylactic acid non-woven fiber membrane is 20-1000 μm; the primary hot-rolling temperature is 80-105° C., the hot-rolling p...

Embodiment 1

[0040] a Polylactic acid non-woven fiber membrane preparation

[0041] The prepared polylactic acid fiber web is hot-rolled once with a flat hot rolling mill or a single stick hot rolling mill to obtain a uniform and dense polylactic acid non-woven fiber membrane. The polylactic acid non-woven fiber web used is made in China. The patent publication number is CN103726220A and the preparation process is obtained in the literature. The thickness of the polylactic acid non-woven fiber membrane is 20 μm; the temperature of the first hot rolling is 80 ° C, the hot rolling pressure is 5 MPa, and the hot rolling time is 1 s.

[0042] b once two-way stretch

[0043]Preheat the primary hot-rolled polyester non-woven fiber membrane prepared in step a with hot air at a temperature of 60°C, and then stretch the preheated polyphenylene sulfide fiber membrane at a temperature of 60°C One-time biaxial stretching, the stretching method is carried out in steps of longitudinal stretching and tr...

Embodiment 2

[0052] a Polylactic acid non-woven fiber membrane preparation

[0053] The prepared polylactic acid fiber web is hot-rolled once with a flat hot rolling mill or a single stick hot rolling mill to obtain a uniform and dense polylactic acid non-woven fiber membrane. The polylactic acid non-woven fiber web used is made in China. The patent publication number is CN101851830A and the preparation process is prepared in the literature. The thickness of the polylactic acid non-woven fiber membrane is 20 μm; the temperature of the first hot rolling is 80 ° C, the hot rolling pressure is 5 MPa, and the hot rolling time is 1 s.

[0054] b once two-way stretch

[0055] Preheat the primary hot-rolled polyester non-woven fiber membrane prepared in step a with hot air at a temperature of 60°C, and then stretch the preheated polyphenylene sulfide fiber membrane at a temperature of 60°C One-time biaxial stretching, the stretching method is simultaneous longitudinal stretching and transverse s...

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Abstract

The invention relates to a preparation method for a two-way stretched polylactic acid fiber porous membrane and belongs to the technical field of thin film materials. Polylactic acid melt-blown or spun-bonded fiber nets are subjected to multi-time hot rolling and two-way stretch, finally heat setting is conducted, and the two-way stretched polylactic acid fiber porous membrane is prepared. The method is suitable for preparing the fiber porous membrane from different polylactic acid melt-blown or spun-bonded fiber nets, and the prepared polylactic acid fiber porous membrane has the advantages that the pore diameter, porosity and thickness are controllable, the surface is smooth, and bio-degradation can be achieved, and can be widely used for packaging materials, filtering materials, medical materials, agricultural protective materials, degradable environment-friendly materials and the like.

Description

technical field [0001] The invention relates to a preparation method of a biaxially stretched polylactic acid fiber porous film, which belongs to the technical field of film materials. Background technique [0002] Polylactic acid is a bio-based polymer, which is derived from renewable natural resources, has complete biodegradability and good biocompatibility, good physical and mechanical properties and processing properties, and is suitable for processing injection molding products. Foaming materials, films, fibers, etc., are mainly used in the fields of biomedicine and food packaging. Under the current concept of advocating energy saving, environmental protection, green and low carbon. Polylactic acid, which can be completely degraded and returned to nature, has attracted more and more attention. [0003] Although polylactic acid has obvious advantages, its use and development are limited due to its low heat resistance temperature. In order to improve the temperature re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/55D04H3/011D04H3/14D06C3/00D06C7/00D06C7/02
CPCD04H1/55D04H3/011D04H3/14D06C3/00D06C7/00D06C7/02
Inventor 王罗新熊思维罗丹王桦陈少华许静吴静殷先泽
Owner WUHAN TEXTILE UNIV
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