Title:
POLYPROPYLENE-BASED POROUS FILM AND LAMINATED FILM CONTAINING SAME
Document Type and Number:
WIPO Patent Application WO/2023/026991
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a polypropylene-based porous film that achieves high air permeability and sufficient laminate strength while maintaining high strength, using polypropylene as a raw material. The present invention provides a porous film comprising a resin composition that contains 230-400 parts by mass of an inorganic filler with respect to 100 parts by mass of a mixed resin that contains, in polypropylene, linear low-density polyethylene at the ratio of at least 3% by mass but less than 10% by mass, said porous film exhibiting air permeability of not more than 80 seconds/100 ml, water pressure resistance of not less than 50 kPa, tensile strength of not less than 15 N/15 mm in the machine direction (MD), and tensile strength of not less than 5 N/15 mm in the transverse direction (TD).
Inventors:
HARADA YUTA (JP)
TANAKA NOBUYUKI (JP)
TANAKA NOBUYUKI (JP)
Application Number:
PCT/JP2022/031423
Publication Date:
March 02, 2023
Filing Date:
August 19, 2022
Export Citation:
Assignee:
TOKUYAMA CORP (JP)
International Classes:
C08J9/00; B32B5/24; B32B27/32; H01M50/417; H01M50/44; H01M50/449; H01M50/489; H01M50/494
Foreign References:
| JP2017105031A | 2017-06-15 | |||
| JP2002249622A | 2002-09-06 | |||
| JP2012136035A | 2012-07-19 | |||
| JP2004174768A | 2004-06-24 | |||
| JP2002307627A | 2002-10-23 |
Attorney, Agent or Firm:
MAEDA & SUZUKI (JP)
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