A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 13/15 (2006.01) B26F 1/26 (2006.01) B29C 51/22 (2006.01)
Patent
CA 2265713
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 surfactant 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~, to minimize wash-off of the surfactant impregnated in the polymer web. The invention also relates to durably-wettable apertured webs.
Procédé de production d'une bande polymère monocouche à mouillabilité durable comportant une pluralité d'ouvertures. Ce procédé consiste à combiner un mélange d'au moins un polymère thermoplastique et d'au moins un tensioactif pouvant migrer puis à extruder le mélange pour former un film polymère monocouche sensiblement continu. On forme ensuite des ouvertures dans le film à l'aide d'écoulements de fluide à haute pression. Pour former les ouvertures dans le film polymère monocouche, le film doit présenter un angle de contact au moins égal à environ 30· pour réduire au maximum la perte par lavage du tensioactif imprégné dans la bande polymère. Cette invention concerne également des bandes perforées de trous à mouillabilité durable.
Holzwarth Ronald Bernd
Lee Yann-Per
Wu Lanying
Sim & Mcburney
The Procter & Gamble Company
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