Wetlaid unitary stratified composite containing absorbent material
First Claim
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1. A wetlaid absorbent composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
- the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length.
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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
39 Claims
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1. A wetlaid absorbent composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
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the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wetlaid absorbent composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
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the first stratum comprising polyethylene terephthalate fibers and a bicomponent binding fiber;
the second stratum comprising crosslinked cellulosic fibers, a wet strength agent, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length. - View Dependent Claims (18)
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19. An absorbent article comprising a wetlaid composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
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the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length. - View Dependent Claims (25)
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20. An absorbent article comprising:
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(a) a liquid pervious topsheet;
(b) a wetlaid composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length; and
(c) a liquid impervious backsheet. - View Dependent Claims (26)
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21. An absorbent article comprising:
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(a) a liquid pervious topsheet;
(b) a wetlaid composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length;
(c) a storage stratum comprising an absorbent fibrous material; and
(d) a liquid impervious backsheet. - View Dependent Claims (27)
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22. An absorbent article comprising:
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(a) a liquid pervious topsheet;
(b) a wetlaid composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata 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 wetlaid composite and the storage stratum; and
(e) a liquid impervious backsheet. - View Dependent Claims (23, 24, 28)
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29. An absorbent composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
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the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length.
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30. An absorbent composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
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the first stratum comprising polyethylene terephthalate fibers and a bicomponent binding fiber;
the second stratum comprising crosslinked cellulosic fibers, a wet strength agent, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length.
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31. An absorbent article comprising a composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
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the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length.
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32. An absorbent article comprising:
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(a) a liquid pervious topsheet;
(b) a composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length; and
(c) a liquid impervious backsheet.
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33. An absorbent article comprising:
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(a) a liquid pervious topsheet;
(b) a composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length;
(c) a storage stratum comprising an absorbent fibrous material; and
(d) a liquid impervious backsheet.
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34. An absorbent article comprising:
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(a) a liquid pervious topsheet;
(b) a composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata 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 composite and the storage stratum; and
(e) a liquid impervious backsheet.
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35. A foam-formed absorbent composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
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the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length.
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36. An absorbent article comprising a foam-formed composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
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the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length.
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37. An absorbent article comprising:
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(a) a liquid pervious topsheet;
(b) a foam-formed composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length; and
(c) a liquid impervious backsheet.
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38. An absorbent article comprising:
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(a) a liquid pervious topsheet;
(b) a foam-formed composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata commingled substantially uniformly across the composite'"'"'s width and along the composite'"'"'s length;
(c) a storage stratum comprising an absorbent fibrous material; and
(d) a liquid impervious backsheet.
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39. An absorbent article comprising:
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(a) a liquid pervious topsheet;
(b) a foam-formed composite comprising a first stratum, a second stratum, and a transition zone intermediate and coextensive with the first and second strata;
the first stratum comprising synthetic fibers and a binder material;
the second stratum comprising crosslinked cellulosic fibers, a binder material, and an absorbent material; and
the transition zone comprising fibers from the first and second strata 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 composite and the storage stratum; and
(e) a liquid impervious backsheet.
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Specification