Polyolefin stretched porous film
AssigneeYupo Corporation
InventorsShouichi ISHIMOTO, Yousuke HIROI, Kazuhisa KITAMURA
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Abstract
The present invention is to provide a resin film having both water impermeability and moisture permeability. The polyolefin stretched porous film according to an embodiment of the present invention contains a polyolefin-based resin and a fine filler having an average primary particle size of 0.05 to 0.8 μm, and has a communicating void. Furthermore, the polyolefin stretched porous film according to an embodiment of the present invention contains a hydrophobizing agent, a water permeability measured in accordance with JIS Z 0221 is from 10000 to 85000 seconds, and a moisture permeability measured in accordance with JIS Z 0208 is from 300 to 2500 g/m2·24 h.
Claims10
A polyolefin stretched porous film comprising:
- a polyolefin-based resin, a fine filler having an average primary particle size of 0.05 to 0.8 μm, and a communicating void;
- the polyolefin stretched porous film comprising a hydrophobizing agent;
- a water permeability measured in accordance with JIS Z 0221 being from 10000 to 85000 seconds;
- and
- a moisture permeability measured in accordance with JIS Z 0208 being from 700 to 2500 g/m2·24 h.
Dependencies are inferred from the claim text.