Treatment of perforated film

Details Treatment of perforated film Treatment of perforated film

C - Chemistry, Metallurgy

08

J

204/96.15

C08J 7/18 (2006.01)

Patent

CA 1195652

ABSTRACT TREATMENT OF PERFORATED FILM A perforated thermoplastic film with less than ideally shaped tapered capillaries which has an increased liquid flow rate through the tapered capillaries and a method for making such a film, including forming a perforated thermoplastic film having tapered capillaries from a resin into which an effective amount of a polarizable, migrating surfactant has been blended and then treating the perforated thermoplastic film to a corona discharge treatment sufficient to increase the flow rate of liquid through said perforated film and provide a film having a percent run off of from about zero to ten percent.

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