Patents

Films, Compositions and Processes

November 29, 2005

An oriented polymeric film has been patented. It comprises at least one layer with a first material that is very highly crystalline polypropylene homopolymer (VHCPP), which has a very high intermolecular stereoregularity consisting of at least about 98% of isotactic polymer. The remainder of the material (if any) is atactic polymer. A second material comprises at least one polymer having a ring and ball softening point from 110° C. to 170° C. and/or a nucleating agent. The second material may also include at least two second materials comprising hydrogenated hydrocarbon resin(s) of different types and/or nucleating agent(s). The second material is added in an amount sufficient for the film to exhibit two or more of the following properties measured in any direction parallel to the film surface and, where necessary, normalized for a 20 micron thick film: WVTR less than about 6 g/24 hours/m2; OTR less than about 1,500 cm3/24 hours/m2; Young’s modulus from 4000 MPa to 5000 MPa, Flexural modulus from 0.4 N (mm2) to 0.7 N (mm2); haze less than about 1.1%; and/or a clarity greater than 97%.

  • Raw Materials Round Up

    Raw Materials Round Up

    Karen McIntyre, editor||June 8, 2015
    Suppliers create additives, preservatives and other specialties to help nonwovens makers meet their goals.

  • Keeping It Clean

    Keeping It Clean

    Tara Olivo, associate editor||June 8, 2015
    Convenience and continued innovation keeps the household wipes market thriving.

  • Fibers Market Outlook

    Fibers Market Outlook

    Tara Olivo, associate editor||June 8, 2015
    Natural and synthetic fiber producers create unique solutions for all nonwovens applications.