Absorbent article containing a wetlaid unitary stratified composite
First Claim
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1. An absorbent article, comprising:
- (a) a liquid pervious topsheet;
(b) a wetlaid absorbent composite, comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first stratum and the second stratum;
the first stratum comprising hydrophobic fibers and a binder;
the second stratum comprising a binder and fibers selected from the group consisting of hydrophilic fibers, hydrophobic fibers, and mixtures thereof; and
the transition zone comprising fibers from the first stratum and the second stratum commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length;
(c) a storage stratum comprising an absorbent fibrous material;
(d) an intermediate stratum interposed between the absorbent composite and the storage stratum; and
(e) a liquid impervious backsheet.
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Abstract
A unitary stratified composite composed of a first stratum and a second stratum integrally connected by a transition zone is disclosed. The first stratum serves as a liquid acquisition stratum that rapidly acquires and then transfers liquid to the second stratum. The second stratum serves to withdraw liquid from the first stratum and further serves as a temporary storage stratum. Methods for forming the unitary stratified composite are also disclosed.
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Citations
28 Claims
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1. An absorbent article, comprising:
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(a) a liquid pervious topsheet;
(b) a wetlaid absorbent composite, comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first stratum and the second stratum;
the first stratum comprising hydrophobic fibers and a binder;
the second stratum comprising a binder and fibers selected from the group consisting of hydrophilic fibers, hydrophobic fibers, and mixtures thereof; and
the transition zone comprising fibers from the first stratum and the second stratum commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length;
(c) a storage stratum comprising an absorbent fibrous material;
(d) an intermediate stratum interposed between the absorbent composite and the storage stratum; and
(e) a liquid impervious backsheet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An absorbent article, comprising:
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(a) a liquid pervious topsheet;
(b) a wetlaid absorbent composite, comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first stratum and the second stratum;
the first stratum comprising first fibers and a binder;
the second stratum comprising second fibers and a binder; and
the transition zone comprising fibers from the first stratum and the second stratum commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length;
(c) a storage stratum comprising an absorbent fibrous material;
(d) an intermediate stratum interposed between the absorbent composite and the storage stratum; and
(e) a liquid impervious backsheet. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An absorbent article, comprising:
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(a) a liquid pervious topsheet;
(b) a wetlaid absorbent composite, comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first stratum and the second stratum;
the first stratum comprising synthetic fibers and a binder;
the second stratum comprising crosslinked cellulosic fibers and a binder; and
the transition zone comprising fibers from the first stratum and the second stratum commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length;
(c) a storage stratum comprising an absorbent fibrous material;
(d) an intermediate stratum interposed between the absorbent composite and the storage stratum; and
(e) a liquid impervious backsheet. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification