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Microporous polylactic acid oriented film

A technology of oriented film and polylactic acid, which is applied in the field of polymer materials and can solve problems such as the difficulty in making microporous films

Inactive Publication Date: 2015-04-29
TORAY ADVANCED MATERIALS RES LAB CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The pore diameters of the microporous films prepared by the above technologies are different, but it is difficult to produce microporous films with nanometer and submicron levels and uniform pore diameters.

Method used

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  • Microporous polylactic acid oriented film
  • Microporous polylactic acid oriented film
  • Microporous polylactic acid oriented film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10、 comparative example 1～2

[0093] According to the proportion listed in Table 1, use a twin-screw extruder to extrude and granulate, and the extrusion temperature is 180-200°C. Next, an unoriented film with a thickness of 100 μm was prepared by blow molding through a single-screw extruder. The blow molding temperature is 180-200°C. Furthermore, in hot air at 80°C, the unoriented film was simultaneously biaxially stretched 3×3 times, and then various performance tests were performed on the obtained film, and the results are listed in Table 1.

Embodiment 11～20、 comparative example 3～4

[0095] According to the proportion listed in Table 2, use a twin-screw extruder to extrude and granulate, and the extrusion temperature is 180-200°C. Next, an unoriented film with a thickness of 100 μm was prepared by blow molding through a single-screw extruder. The blow molding temperature is 180-200°C. Furthermore, in water at 80°C, the unoriented film was simultaneously biaxially stretched 3×3 times, and then various performance tests were performed on the obtained film, and the results are listed in Table 2.

Embodiment 21-27

[0097] According to the proportioning of Example 8, a twin-screw extruder is used to extrude and granulate, and the extrusion temperature is 180-200°C. Next, a non-oriented film with a thickness of 100 μm was prepared by single-screw extrusion casting at a casting temperature of 180-220° C. Furthermore, according to the conditions shown in Table 3, the unoriented film was uniaxially or biaxially stretched in hot water. Then, various performance tests were carried out on the obtained film, and the results are listed in Table 3.

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Abstract

The invention provides a microporous polylactic acid oriented film, which is provided with surface holes with diameters of 10-1000nm, wherein the sum of the areas of the holes accounts for more than 20% of the total superficial area of the film. The microporous polylactic acid oriented film provided by the invention is a nanoscale micropore microporous oriented film, which is dense and uniform, the processing method is simple and high-speed, and no toxic or harmful solvent is used, so that the microporous polylactic acid oriented film is green and environment-friendly. The microporous polylactic acid oriented film can be applied to such fields as hygiene care, medical treatment, construction, water treatment, electronic products, etc.

Description

technical field [0001] The invention belongs to the field of polymer materials and relates to a microporous film. Background technique [0002] As moisture-permeable and waterproof films, battery separators, separation membranes, tissue engineering materials, energy storage materials, etc., microporous films are widely used in various fields such as health care, medical treatment, construction, water treatment, and electronic products. The preparation methods of microporous films mainly include foaming, particle filling-stretching, solvent etching, phase separation, self-assembly, etc. The microporous films prepared by various methods have their own characteristics in structure. [0003] Polylactic acid is a kind of biodegradable polyester. Microporous films containing this polymer have been mentioned and can be applied in the fields of health care and medical treatment. [0004] CN201310185870.6 adopts the method of particle filling-stretching to provide a microporous orie...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L71/08C08L53/00C08L67/02C08K5/11C08K3/26C08K3/34B29C55/00
Inventor 桂宗彦阮晓白长田俊一
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
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