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Moisture permeable porous film

A porous and moisture-permeable technology, applied in the field of thin films, can solve problems such as insufficiency and achieve good anti-adhesion effect

Inactive Publication Date: 2013-09-25
TORAY ADVANCED MATERIALS RES LAB CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using the technology described in the above-mentioned patent documents can improve a certain moisture permeability, but it is not sufficient.

Method used

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  • Moisture permeable porous film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Polylactic acid resin (A1) 15 weight parts, polylactic acid resin (A3) 43 weight parts, polyethylene terephthalate adipate (B1) 20 weight parts, block copolymer plasticizer (B4) 22 Parts by weight, a mixture of 26 parts by weight of filler (C2), added to a vacuum twin-screw extruder with a screw diameter of 44mm and a screw temperature of 180°C, melted and kneaded while vacuuming, and after uniform mixing, the composition was obtained of pellets. The obtained pellets were vacuum-dried at 60° C. for 12 hours in a rotary vacuum drying oven.

[0099] The dried pellets were added to a single-screw extruder with a coil temperature of 180°C, and a film was produced by blowing the film as follows. From the spiral annular die head with a diameter of 250mm, a gap of 1.3mm, and a temperature of 160°C, a film bubble with an inflation ratio of 2.4 is extruded upward. After being cut into two pieces, it is wound up with a winder to obtain a film made by the blown film method.

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Embodiment 2

[0102] As shown in Table 1, the composition and manufacturing conditions of the film were changed, and the method of Example 1 was used to obtain a film with a thickness of 10 μm. The physical properties of the obtained films are listed in Table 1.

Embodiment 3

[0104] As shown in Table 1, the composition and manufacturing conditions of the film were changed, and the method of Example 1 was used to obtain a film with a thickness of 33 μm. The physical properties of the obtained films are listed in Table 1.

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Abstract

The invention discloses a moisture permeable porous film. The film comprises following ingredients, by weight: 10 to 95 portions of polylactic resin (A), 5 to 90 portions of thermoplastic resin (B) which is not a polylactic resin, and zeolite which is used as a filling agent, wherein the total amount of polylactic resin (A) and thermoplastic resin (B) is 100 portions. The porous film possesses excellent moisture permeability, flexibility, heat resistance, and is biodegradable. The porous film can be applied in the production of the substrates of bedsheets, pillowcases, sanitary towels, disposable diapers and the like which possess hydroscopicity, and materials of raincoats, gloves, garbage bags, fertilizer bags, vegetable or fruit packing bags, and packing bags of industrial products.

Description

technical field [0001] The invention belongs to the field of films, and in particular relates to a moisture-permeable porous film with polylactic acid resin as a matrix, good moisture permeability, flexibility, heat resistance, biodegradability and high bio-based content. Background technique [0002] In recent years, with the improvement of environmental protection awareness, the problem of soil pollution caused by the waste of plastic products and the "greenhouse effect" caused by the increase of carbon dioxide emissions after incineration have attracted much attention. Polylactic acid is a polymer obtained by polymerizing lactic acid as the main raw material. The raw material source is sufficient and can be regenerated. The production process of polylactic acid is non-polluting, and the product can be biodegraded to realize the cycle in nature, so it has attracted attention. [0003] The application of polylactic acid is very extensive, and one important aspect is the ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L73/00C08K3/34C08K9/04C08K3/26
Inventor 朱思君阮晓白王春河野俊司
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
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