Claims
- 1. An absorbent article comprising:a liquid permeable topsheet; a backsheet; and an absorbent core positioned between the topsheet and the backsheet, said absorbent core comprising a longitudinally C-folded absorbent laminate, said absorbent laminate comprising: an upper layer; a lower layer; an absorbent layer positioned between the upper and lower layers; wherein said absorbent layer comprises from about 50 to about 95 percent by weight SAP; and wherein the upper layer has a porosity greater than about 40 ml/cm2/min, and the lower layer has a machine directional wet tensile strength greater than about 200 gm/inch.
- 2. An absorbent core comprising a longitudinally folded absorbent laminate, said absorbent laminate comprising:an upper layer; a lower layer; and an absorbent layer positioned between the upper and lower layers, wherein said absorbent layer comprises from about 50 to about 95 percent by weight SAP and has a SAP efficiency of greater than about 70 percent.
- 3. The absorbent core of claim 2, wherein said absorbent laminate has a thickness of about 0.5-1.1 mm and said absorbent layer has an average density of from about 0.2-0.3 gm/cm3.
- 4. The absorbent core of claim 2, wherein said absorbent laminate has a central channel area formed between two side folded areas, said folded areas increasing the effective surface area available for liquid absorption in the absorbent core.
- 5. The absorbent core of claim 2, wherein the upper layer has a porosity of about 40 ml/cm2/min and the lower layer has a machine direction (MD) wet tensile strength greater than about 200 gm/inch.
- 6. The absorbent core of claim 5, wherein said upper and lower layers are selected from the group consisting of tissue, airlaid fluff pulp and synthetic non-woven.
- 7. The absorbent core of claim 2, wherein said absorbent layer further comprises a layer of fibers, said layer of fibers being bound to the upper and lower layers, and wherein a portion of the SAP is bound to the lower layer while another portion of the SAP is loosely contained within said fibers of the absorbent layer.
- 8. The absorbent core of claim 7, wherein said SAP is attached to the lower layer by applying an adhesive at a basis weight of more than about 2-8 g/sm along a central portion of the lower layer to render a central portion of the lower layer substantially non-porous; and wherein said layer of fibers is attached to the upper layer by applying an adhesive at a basis weight of less than about 2 g/sm.
- 9. The absorbent core of claim 8, wherein said layer of fibers is a tow of cellulose acetate fibers, rayon fibers, raw cellulosic fibers, polyacrylonitrile fibers, cotton fibers or cotton linter fibers.
Parent Case Info
This is a continuation-in-part of International Application PCT/US99/06805, with an international filing date of Mar. 30, 1999, published in English under PCT Article 21(2) and now abandoned, which is a continuation of U.S. patent application Ser. No. 09/050,003, filed on Mar. 30, 1998, and issued as U.S. Pat. No. 6,068,620 on May 30, 2000.
US Referenced Citations (24)
Foreign Referenced Citations (1)
Number |
Date |
Country |
WO99?49826 |
Oct 1999 |
WO |
Non-Patent Literature Citations (2)
Entry |
International Search Report—Jan. 30, 2001 PCT/US00/30325. |
International Search Report-May 28, 1999. |
Continuations (1)
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Number |
Date |
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Parent |
09/050003 |
Mar 1998 |
US |
Child |
PCT/US99/06805 |
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US |
Continuation in Parts (1)
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Number |
Date |
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Parent |
PCT/US99/06805 |
Mar 1999 |
US |
Child |
09/676951 |
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US |