Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Toru Terakawa0
Yasushi Usami0
Takeyoshi Yamada0
Date of Patent
March 25, 2014
0Patent Application Number
133781070
Date Filed
June 16, 2010
0Patent Primary Examiner
Patent abstract
Provided is a porous polypropylene film having both air permeability properties and puncture strength. A porous polypropylene film which has an air permeability of 700 seconds/100 ml or less and a puncture strength of 1.5 N or greater, and has β activity can be obtained when the porous polypropylene film is made to have a tensile strength in the machine direction of the film, EMD, of 100 MPa or greater, a tensile strength in the transverse direction to the machine direction, ETD, of less than 100 MPa, and a ratio of EMD and ETD, EMD/ETD, of 1.5 to 10.
Timeline
No Timeline data yet.
Further Resources
No Further Resources data yet.
