| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polypropylene porous film having excellent mechanical characteristics such as piercing strength and weather resistance, and also excellent in moisture permeable property.SOLUTION: This invention provides a polypropylene porous film in which a moisture permeability is 150 g/mh or more, a piercing strength is 100 N/mm or more, and a tensile strength after application of ultraviolet rays of 44MJ/mis 50% or more of a tensile strength before the application of the ultraviolet rays.</p> |
