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Resin composition for preparing micro-porous thin film and micro-porous thin film

A resin composition, microporous technology, applied in the field of microporous film, can solve the problem of low moisture permeability

Active Publication Date: 2015-04-29
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the gap between its performance and traditional polyolefin materials, its moisture permeability is generally relatively low

Method used

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  • Resin composition for preparing micro-porous thin film and micro-porous thin film
  • Resin composition for preparing micro-porous thin film and micro-porous thin film
  • Resin composition for preparing micro-porous thin film and micro-porous thin film

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Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0079] According to the proportion listed in Table 1, pelletize with a twin-screw extruder at an extrusion temperature of 160-220°C. Next, an original film with a thickness of 80 μm was prepared by blow molding with a single-screw extruder. The blow molding temperature is 180-200°C. Furthermore, at 85° C., the original film was biaxially stretched 3.5×3.5 times, and then various performance tests were performed on the obtained film, and the results are listed in Table 1.

[0080] Table 1 (unit: parts by weight)

[0081]

[0082] Table 1 (continued) (unit: parts by weight)

[0083]

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PUM

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Abstract

The invention relates to a resin composition for preparing a micro-porous thin film and the prepared micro-porous thin film. The composition comprises the following components in parts by weight: 20-80 parts of polylactic resin A, 5-50 parts of a resin component B which is incompatible with polylactic acid and 5-50 parts of filler C, wherein the percentage by weight of the filler C which is fully in the phase B or partially in the phase B is as follows: C% is greater than (0.9*B%+10%) and B% is the volume percentage of B in the resin composition. The water vapor permeability of the micro-porous thin film prepared from the resin composition is higher than the water vapor permeability of a thin film where the filler is averagely distributed. The resin composition for preparing the micro-porous thin film provided by the invention can be used for preparing the micro-porous thin film and can be used in the field of hygienic products, building materials and the like.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and relates to a resin composition for preparing microporous films and a microporous film prepared by the resin composition. Background technique [0002] The so-called waterproof and moisture-permeable microporous film refers to that after the polymer is mixed with the filler, the original film is obtained by casting or blow molding, and then stretched in one or two directions to make the filler and the polymer or the polymer Interfacial separation occurs between the polymer and the film, resulting in cavitation. Waterproof and moisture-permeable microporous films are mostly used in disposable products such as nursing products, sanitary products, and paper diapers. Said polymers are generally polyolefins, especially polyethylene or polypropylene. Polyolefin polymers are non-degradable and use petroleum as raw materials, so such films have a certain impact on the environment. The breath...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L69/00C08K3/26C08K3/34C08K5/11
Inventor 阮晓白桂宗彦长田俊一
Owner TORAY IND INC
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