Unitary stratified composite
First Claim
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1. An absorbent article, comprising:
- (a) a liquid pervious topsheet,(b) an 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 a superabsorbent polymer; and
(d) a liquid impervious backsheet.
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Abstract
An 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 severs as a temporary storage stratum. Methods for forming the unitary stratified composite are also disclosed.
78 Citations
13 Claims
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1. An absorbent article, comprising:
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(a) a liquid pervious topsheet, (b) an 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 a superabsorbent polymer; and (d) a liquid impervious backsheet. - View Dependent Claims (2, 3, 4, 5)
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6. An absorbent article, comprising:
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(a) a liquid pervious topsheet; (b) an 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 a superabsorbent polymer; and (d) a liquid impervious backsheet. - View Dependent Claims (7, 8, 9, 10)
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11. An absorbent article, comprising:
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(a) a liquid pervious topsheet, (b) an 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 a superabsorbent polymer; and (d) a liquid impervious backsheet. - View Dependent Claims (12, 13)
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Specification