Porous polypropylene film, process for producing the same, and absorbent article employing the film
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 1, 2005
Grant Date -
Aug 7, 2003
app pub date -
Nov 20, 2002
filing date -
Jun 2, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
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.degree. C. of 2.0 to 4.0 g/10 min and (II) a .beta.-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.sup.2.multidot.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.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully