Patents Represented by Attorney, Agent or Law Firm Rich E. James
  • Bioriented polyethylene film with a high water vapor transmission rate
    Patent number: 6540949
    Abstract: Methods of producing polyethylene films having a desired water vapor transmission rate (WVTR) are provided. The methods include casting a polyethylene sheet which has a base layer of a polyethylene and a cavitating agent, and at least one layer of a WVTR-controlling material, and subsequently biaxially orienting the sheet to yield a film having the desired WVTR. The base layer has a porous microstructure and a WVTR substantially higher than the desired WVTR.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: April 1, 2003
    Assignee: ExxonMobil Oil Corporation
    Inventors: Hans Joachim Pip, Rhonda Rogers Agent