| 摘要 |
A breathable, substantially liquid impermeable microporous film and laminate are provided for use in a wide variety of personal care garments and protective garments. The film, or laminate containing the film, is 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<2>-24 hours and a first average pore aspect ratio of at least about 4.0 coinciding with the unstretched width. The film and laminate have a second average pore aspect ratio of about 3.5 or less, and a higher second water vapor transmission rate, When stretched in the cross-direction by at least about 25%. The pore aspect ratio upon cross-direction stretching provides less backsheet dampness despite the increase in film breathability.
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