The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2005
Filed:
Jun. 01, 2001
Naoki Ikeda, Kyoto, JP;
Kiyoshi Sadamitsu, Kyoto, JP;
Manabu Hoki, Kyoto, JP;
Kenichiro Nagata, Kyoto, JP;
Toshiaki Kobayashi, Kyoto, JP;
Naoki Ikeda, Kyoto, JP;
Kiyoshi Sadamitsu, Kyoto, JP;
Manabu Hoki, Kyoto, JP;
Kenichiro Nagata, Kyoto, JP;
Toshiaki Kobayashi, Kyoto, JP;
New Japan Chemical Co., Ltd., Kyoto, JP;
Abstract
Disclosed is a porous film made of a resin composition containing (I) (i) a propylene-ethylene copolymer or (ii) a polypropylene-based resin mixture containing a propylene-ethylene copolymer, each having an ethylene content of 3.0 to 7.0 wt. % and an MFR measured at 230° C. of 2.0 to 4.0 g/10 min and (II) a β-crystal nucleating agent; the film having a porosity of 20 to 80%, a Gurley air permeability of 5,000 sec/100 cc or lower as measured according to JIS P-8117, a water vapor permeability of 2,000 g/m·24 h or higher as measured according to JIS Z-0208 and a water pressure resistance of 75 kPa or higher as measured according to JIS L-1092 using an aqueous surfactant solution; a process for producing the same; and an absorbent article employing the porous film as a backsheet.