Absorbent core having two or more types of superabsorbent
First Claim
1. An absorbent core for a disposable absorbent article comprising:
- a central fibrous layer having synthetic fibers;
an upper layer disposed on top of the central fibrous layer comprising a first superabsorbent polymer in free form; and
a lower layer disposed beneath the central fibrous layer comprising a substantially continuous layer of a second superabsorbent polymer;
wherein the first superabsorbent polymer has different superabsorbent properties than the second superabsorbent polymer.
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Abstract
An absorbent core for use in an absorbent article, including a central fibrous layer having synthetic fibers, and two or more types of superabsorbent material (SAP). The SAP is contained primarily in upper and/or lower layers of the absorbent core. The upper and/or lower layer may be a substantially continuous layer of SAP, or may include a free-form of SAP. The upper and/or lower layers may have a blend of two or more types of SAP, or may have only a virgin, unblended SAP. Each of the types of SAP preferably has a different absorbent property (such as high AUL, or fast absorption rate), so that the resultant absorbent core benefits from having multiple absorbent properties provided by the SAP'"'"'s. An absorbent article including the absorbent core, and a method of providing an absorbent article including the absorbent core are also described.
221 Citations
126 Claims
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1. An absorbent core for a disposable absorbent article comprising:
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a central fibrous layer having synthetic fibers;
an upper layer disposed on top of the central fibrous layer comprising a first superabsorbent polymer in free form; and
a lower layer disposed beneath the central fibrous layer comprising a substantially continuous layer of a second superabsorbent polymer;
wherein the first superabsorbent polymer has different superabsorbent properties than the second superabsorbent polymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An absorbent core for a disposable absorbent article comprising:
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a central fibrous layer having synthetic fibers; and
a lower layer disposed beneath the central fibrous layer comprising a substantially continuous layer of a superabsorbent polymer;
wherein the lower layer comprises a blend of a first superabsorbent polymer and a second superabsorbent polymer;
wherein the first superabsorbent polymer has different absorbent properties than the second superabsorbent polymer. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. An absorbent core for a disposable absorbent article comprising:
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a central fibrous layer having synthetic fibers; and
an upper layer disposed on top of the central fibrous layer comprising a substantially continuous layer of superabsorbent polymer;
wherein the upper layer comprises a blend of a first superabsorbent polymer and a second superabsorbent polymer;
wherein the first superabsorbent polymer has different absorbent properties than the second superabsorbent polymer. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73)
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74. An absorbent article comprising:
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a liquid permeable topsheet;
a liquid impermeable backsheet;
an absorbent core disposed between the topsheet and backsheet;
wherein the absorbent core comprises a central fibrous layer having synthetic fibers;
an upper layer disposed on top of the central fibrous layer comprising a first superabsorbent polymer in free form; and
a lower layer disposed beneath the central fibrous layer comprising a substantially continuous layer of a second superabsorbent polymer;
wherein the first superabsorbent polymer has different absorbent properties than the second superabsorbent polymer. - View Dependent Claims (75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113)
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114. A method of manufacturing a disposable absorbent article comprising the steps of:
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a) providing a liquid impermeable back sheet and a liquid permeable top sheet;
b) preparing an absorbent core by;
b1) providing a central fibrous layer having synthetic fibers;
b2) providing an upper layer comprised primarily of a first superabsorbent polymer;
b3) providing a lower layer comprised of a substantially continuous layer of a second superabsorbent polymer having different absorbent properties than the first superabsorbent polymer; and
b4) disposing the central fibrous layer at least partially between the upper layer and the lower layer; and
c) disposing the absorbent core at least partially between the top sheet and the back sheet. - View Dependent Claims (115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126)
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Specification