This invention relates to improved sheets of flash-spun plexifilamentary film-fibrils useful in fluid microfiltration and sterile packaging. The above and other properties of the present invention are achieved by a sheet material suitable for use in microfiltration of liquids having a permeability that causes a pressure drop of less than 4 psid at a flow rate of 10 gal/hr, and that has a filtration efficiency of 99 % of dust particulates in the size range of 1 to 2 microns at a pressure differential of 30 psid. The invention also relates to a sheet material suitable for use in sterile packaging that has a Gurley Hill Porosity of less than 15 seconds and a spore log reduction value of at least 2.5.
申请公布号
WO9807905(A2)
申请公布日期
1998.02.26
申请号
WO1997US14508
申请日期
1997.08.19
申请人
E.I. DU PONT DE NEMOURS AND COMPANY
发明人
MARSHALL, LARRY, R.;LIM, HYUN, S.;NOBBEE, WAZIR;WARREN, JENNIFER, M.