06258308 is referenced by 72 patents and cites 354 patents.

A process for rendering films, film composites, and articles made therefrom less resistant to passage of water vapor by passing a filled precursor film or film composite through the nip of interdigitating grooved rollers. The films or film composites are generally formed using a precursor film of a film forming polyolefin or polyolefin blend, with a relatively high filler loading and optionally an elastomer. A process is disclosed for making diapers or other disposable items where a relatively high water vapor is coupled with a resistance to liquid strikethrough. In one embodiment of the invention, the interdigitating grooved rollers are maintained in a temperature range of from about 91° F. to about 159° F.

Title
Process for adjusting WVTR and other properties of a polyolefin film
Application Number
9/312103
Publication Number
6258308 (B1)
Application Date
May 14, 1999
Publication Date
July 10, 2001
Inventor
John H Mackay
Lake Zurich
IL, US
Kevin A Brady
Cary
IL, US
Agent
Thomason Moser & patterson L
US
Assignee
Exxon Chemical Patents
TX, US
IPC
B29C 47/88
View Original Source