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US 8,541,642 B2Granted
Breathable and liquid impermeable web and method of making the web
AssigneeThe Procter & Gamble Company
InventorsBarry Jay Anderson, Todd Leon Mansfield, George Christopher Dobrin, Suna Polat
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Abstract
A method is disclosed for modifying the physical characteristics of a web which involves passing the web between at least one pair of interengaged rolls to incrementally stretch the web, and then withdrawing the incrementally stretched web from between the rolls under tension. A web modified according to the disclosed method has desirable breathability and liquid impermeability, as well as extensibility and a soft, cloth-like textured surface.
Claims20
A disposable absorbent article comprising:
- a) a vapor permeable, liquid impervious, backsheet laminate;
- b) a liquid pervious topsheet which is positioned in facing relation with said backsheet;
- c) an absorbent core located between the backsheet laminate and the topsheet;
- wherein a backsheet film is joined to a nonwoven to form the vapor permeable, liquid impermeable, microporous backsheet laminate;
- wherein the vapor permeable, liquid impermeable, microporous backsheet laminate has a dynamic fluid impact value of less than about 10 g/m2;
- wherein the vapor permeable, liquid impervious, backsheet laminate is modified such that it comprises a pattern of deformed areas, wherein the pattern of deformed areas comprise alternating rows of peaks and valleys;
- wherein the peaks and the valleys of the deformed areas are thicker than intermediate portions disposed between the peaks and the valleys;
- wherein the intermediate portions are more breathable versus other portions of the backsheet film;
- and
- wherein the modified backsheet film is from about 0.25 mils to about 2.5 mils.
7 more elements
Dependencies are inferred from the claim text.