Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Nonwoven fabric – Including strand or fiber material which is of specific...
Patent
1997-11-07
2000-03-07
Bell, James J.
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Nonwoven fabric
Including strand or fiber material which is of specific...
264205, 4283044, D04H 100
Patent
active
060340088
ABSTRACT:
This invention relates to improved sheets of flash-spun plexifilamentary film-fibrils useful in fluid microfiltration and sterile packaging. The sheet material suitable for use in microfiltration of liquids has a permeability that causes a pressure drop of less than 21 kPa at a water flow rate per unit area of 12.55 ml/min/cm.sup.2, and that has a filtration efficiency of 99% of dust particulates in the size range of 1 to 2 microns suspended in a stream of distilled water pumped through the sheet material at a pressure differential of 207 kPa. The sheet material suitable for use in sterile packaging that has a Gurley Hill Porosity of less than 15 seconds and a bacteria spore log reduction value of at least 2.5.
REFERENCES:
patent: 3081519 (1963-03-01), Blades et al.
patent: 3227794 (1966-01-01), Anderson et al.
patent: 3427376 (1969-02-01), Dempsey
patent: 3478141 (1969-11-01), Dempsey et al.
patent: 3532589 (1970-10-01), David
patent: 3860369 (1975-01-01), Brethauer et al.
patent: 3946780 (1976-03-01), Sellers
patent: 4539256 (1985-09-01), Shipman
patent: 4617124 (1986-10-01), Pall et al.
patent: 4652322 (1987-03-01), Lim
patent: 4724078 (1988-02-01), Auriol et al.
patent: 5023130 (1991-06-01), Simpson et al.
patent: 5032326 (1991-07-01), Shin
patent: 5147586 (1992-09-01), Shin et al.
patent: 5250237 (1993-10-01), Shin
patent: 5308691 (1994-05-01), Lim et al.
patent: 5476589 (1995-12-01), Bacino
S. Nago and Y. Mizutani, Microporous Polypropylene Sheets Containing Polymethylsilsesquioxane Filler, Journal of Applied Polymer Science, 50, 1815-1822, 1993.
Y. Mizutani, S. Nakamura, S. Kaneko, K. Okamura, Microporous Polypropylene Sheets, Am. Che. Soc., Div. Fuel Chem., 20, 122, 1975.
Dr. Ernest Mayer, New Tyvek.RTM. Filtration Media to Replace Tyvek.RTM. T-980--Presented at the American Filtration and Separation Society's Advancing Filtration Solutions Conference held Apr. 28-May 2, 1997 in Minneapolis, Minnesota.
Dr. Ernest Mayer, Estimating Media Blinding Via Coulter Porometer.TM. Analyses--Presented at the American Filtration and Separation Society's Advancing Filtration Solutions Conference held Apr. 28-May 2, 1997 in Minneapolis, Minnesota.
Lim Hyun Sung
Marshall Larry R
Nobbee Wazir
Warren Jennifer Marie
Bell James J.
E. I. Du Pont de Nemours and Company
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