Breathable, hydrolyzable porous film

Details Breathable, hydrolyzable porous film Breathable, hydrolyzable porous film

1992-04-21

1994-08-23

Sluby, P. C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

428323, 428330, 428910, 528358, 528354, 562589, 549274, B32B 306, C08G 6308

Patent

active

053406460

ABSTRACT:
A breathable, hydrolyzable, porous film which is obtained by the process comprising adding from 40 to 250 parts by weight of a finely-powdered filler having an average particle size of from 0.3 to 4 .mu.m to 100 parts by weight of a polylactic acid-based resin composition comprising from 80 to 100% by weight of polylactic acid or a lactic acid-hydroxycarboxylic acid copolymer and from 0 to 20% by weight of a plasticizer, melting and film-forming the resultant mixture, and successively stretching the thus-obtained film 1.1 times or more at least in the direction of the axis; and which is consequently useful as a material for leakproof films of sanitary materials such as a paper diaper and packaging materials, and does not accumulate as wastes because of hydrolyzability in the natural environment in the case of being abandoned after use.

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