Film having high breathability induced by low cross-directional stretch
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United States of America Patent
Stats
-
Nov 2, 2004
Grant Date -
May 13, 2004
app pub date -
Oct 15, 2003
filing date -
May 3, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A breathable, substantially liquid impermeable film and laminate are provided for use in a wide variety of personal care garments and protective garments. The film, and laminate containing the film, are extendible in a cross-direction to a stretched width which is at least 25% greater than an original, unstretched width. The film and laminate have a first water vapor transmission rate of at least about 500 grams/m.sup.2 -24 hours coinciding with the unstretched width. The film and laminate have a much higher second water vapor transmission rate which is at least about 225% of the first water vapor transmission rate, and not less than about 4000 grams/m.sup.2 -24 hours, coinciding with a stretched width that is only 25% greater than the stretched width.
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