Apertured films having durable wettability and processes for mak

Details Apertured films having durable wettability and processes for mak Apertured films having durable wettability and processes for mak

1998-05-29

1998-11-10

Foelak, Morton

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428132, 428220, 4283044, 4283155, 428338, 521 64, 604358, 604369, B32B 310

Patent

active

058340920

ABSTRACT:
This invention relates to a process for forming a single-layer, durably wettable polymeric web having a plurality of apertures. This process comprises melting a mixture of at least one thermoplastic polymer and at least one migratable surfict and extruding the mixture to form a single-layer, substantially continuous polymeric film. The film is then apertured using high pressure fluid flows. Aperture formation is conducted when the single layer polymeric film has a contact angle of at least about 30.degree., to minimize wash-off of the surfactant impregnated in the polymer web. The invention also relates to durably-wettable apertured webs.

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