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microporous plastic film

A plastic film, microporous technology, applied in the field of microporous film, can solve the problems of difficult to make film, hard and uncomfortable, high glass transition temperature, etc., and achieve the effect of complete biodegradability

Active Publication Date: 2017-03-29
TORAY ADVANCED MATERIALS RES LAB CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the glass transition temperature of polylactic acid is higher than the body temperature of the human body, when polylactic acid is used as a moisture-permeable film for contact with the human body, it will feel hard and uncomfortable. Therefore, it is necessary to soften and modify polylactic acid
At the same time, the high glass transition temperature and unique crystallization properties also make it difficult to produce a film with polylactic acid as the main component that is waterproof, moisture-permeable and flexible through known technologies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9、 comparative example 1～3

[0076] 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, a raw film with a thickness of 100 μm was prepared by blow molding with a single-screw extruder. The blow molding temperature is 180-200°C. Furthermore, at 80° C., the original film was uniaxially stretched 5 times, and then various performance tests were performed on the obtained film, and the results are listed in Table 2.

Embodiment 10-12

[0078] According to the proportioning of Example 9, a twin-screw extruder is used to extrude and granulate, and the extrusion temperature is 180-200°C. Next, a raw film with a thickness of 100 μm was prepared by single-screw extrusion casting at a casting temperature of 180-220° C. Furthermore, under the conditions shown in Table 3, the original film was stretched, and then various performance tests were performed on the obtained film, and the results are listed in Table 3.

[0079] The microporous plastic film of the present invention has complete biodegradability, will not cause white pollution, is green and environmentally friendly, has good waterproof and moisture permeability, water resistance greater than 800mm, and moisture permeability greater than 1000g / m 2 ·day, soft in nature, comfortable to the touch, excellent in molding processability. Compared with the comparison example, it is a more advantageous technology.

[0080]

[0081]

[0082]

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Abstract

The invention relates to a microporous plastic film. According to the invention, an area of surface pores with diameters within a range of 0.2-7mum accounts for 0.5-15% of a total surface area. A water resistance of the film is higher than 800mm, and a moisture permeability of the film is higher than 1000g / m<2>.day. A stiffness of the film is lower than 40mm. The microporous plastic film provided by the invention has complete biodegradability, and does not cause white pollution. The film is green and environment-friendly, and has good waterproof performance and moisture permeability. The film is soft, and provides a comfortable touch. The film has good forming and processing performances, and can be applied in fields such as sanitary materials, clothing, and building. The microporous plastic film has waterproof, moisture-permeating, and air-permeating effects.

Description

technical field [0001] The invention belongs to the field of polymer materials and relates to a microporous film. Background technique [0002] The so-called waterproof and moisture-permeable microporous film means that after the polymer is mixed with the filler, the original film is made by casting or blow molding, and then stretched in one or two directions to separate the filler and the polymer. , causing cavitation in the film. Said polymer is generally polyolefin, especially polyethylene or polypropylene, such as the breathable film disclosed in Patent Document 1, comprising polypropylene copolymer and filler. [0003] Waterproof and moisture-permeable microporous films are mostly used in disposable products such as nursing products, sanitary products, and paper diapers. Polyolefin polymers are non-degradable and use petroleum as raw materials, so such films have a certain impact on the environment. With the strengthening of the public's concept of green environmenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L77/00C08L69/00C08L67/00C08K13/02
Inventor 桂宗彦阮晓白王春长田俊一
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
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