IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0469930
(1999-12-21)
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발명자
/ 주소 |
- Cook, Jeffery T.
- Bell, Robert Irvin
- Fields, Sonja McNeil
- Huff, Byron Jerry Lee
- Morton, Gerald Hunt
- Schoggen, Howard Leon
- Smith, David Jay
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
39 인용 특허 :
70 |
초록
▼
Disclosed are absorbent structures including fibers bound with a polyvalent cation-containing compound and superabsorbent polymer particles. The fibers exhibit an ion extraction factor of at least 5%. Also disclosed are multi-strata absorbent structures, such as disposable absorbent articles, includ
Disclosed are absorbent structures including fibers bound with a polyvalent cation-containing compound and superabsorbent polymer particles. The fibers exhibit an ion extraction factor of at least 5%. Also disclosed are multi-strata absorbent structures, such as disposable absorbent articles, including the treated fibers and SAP particles. Further disclosed are methods for preparing absorbent structures including the treated fibers; structures including fibers combined with a polyvalent cation-containing compound; and methods for treating or coating SAP particles with polyvalent cation-containing compounds.
대표청구항
▼
Disclosed are absorbent structures including fibers bound with a polyvalent cation-containing compound and superabsorbent polymer particles. The fibers exhibit an ion extraction factor of at least 5%. Also disclosed are multi-strata absorbent structures, such as disposable absorbent articles, includ
Disclosed are absorbent structures including fibers bound with a polyvalent cation-containing compound and superabsorbent polymer particles. The fibers exhibit an ion extraction factor of at least 5%. Also disclosed are multi-strata absorbent structures, such as disposable absorbent articles, including the treated fibers and SAP particles. Further disclosed are methods for preparing absorbent structures including the treated fibers; structures including fibers combined with a polyvalent cation-containing compound; and methods for treating or coating SAP particles with polyvalent cation-containing compounds. upper ply, the lower ply having an upper surface and a lower surface and including at least one stratum including natural fibers, superabsorbent polymer particles, and a binder, wherein the lower surface of the upper ply has a surface area less than about 80% of the upper surface area of the lower ply. 3. The absorbent structure of claim 1 wherein the length of the synthetic matrix fibers is from about 4 to about 12 mm. 4. The absorbent structure of claim 1 wherein the synthetic matrix fibers are from about 2 to about 30 denier per fiber. 5. The absorbent structure of claim 4 wherein the synthetic matrix fibers are from about 6 to about 15 denier per fiber. 6. The absorbent structure of claim 1 wherein the synthetic matrix fibers are selected from the group consisting of polyethylene, polypropylene, polyester, polyamide, cellulose acetate, rayon fibers, and mixtures thereof. 7. The absorbent structure of claim 1 wherein the binder is selected from the group consisting of latex binders, thermoplastic powders, thermoplastic fibers, bicomponent fibers and mixtures thereof. 8. The absorbent structure of claim 1 wherein the binder is selected from the group consisting of polyamide-polyamine epichlorohydrin adducts, cationic starch, dialdehyde starch, poly(vinyl alcohol), chitosan and mixtures thereof. 9. The absorbent structure of claim 1 wherein said natural fibers are selected from the group consisting of cotton, softwood pulps, hardwood pulps, straw, keaf fibers, cellulose fibers modified by chemical, mechanical and/or thermal treatments, keratin fibers, and mixtures thereof. 10. The absorbent structure of claim 1 wherein the basis weight of the top stratum of the upper ply is from about 30 gsm to about 60 gsm. 11. The absorbent structure of claim 1 wherein the content of synthetic matrix fibers in the top stratum of the upper ply is from about 50 to about 99% by weight. 12. The absorbent structure of claim 10 wherein the content of synthetic matrix fibers in the top stratum of the upper ply is from about 75 to about 90% by weight. 13. The absorbent structure of claim 1 wherein the basis weight of the middle stratum of the upper ply is from about 80 gsm to about 300 gsm. 14. The absorbent structure of claim 1 wherein the content of superabsorbent polymer particles in the middle stratum of the upper ply is from about 5 to about 60% by weight of the upper ply. 15. The absorbent structure of claim 14 wherein the content of superabsorbent polymer particles in the middle stratum of the upper ply is from about 20 to about 50% by weight. 16. The absorbent structure of claim 1 wherein the bottom stratum of the upper ply is an airlaid layer. 17. The absorbent structure of claim 1 wherein the bottom stratum of the upper ply is a wet-laid cellulose tissue. 18. The absorbent structure of claim 1 wherein the apparent density of the lower ply is from about 0.15 g/cc to about 0.25 g/cc. 19. The absorbent structure of claim 1 wherein the basis weight of the lower ply is from about 150 gsm to about 400 gsm. 20. The absorbent structure of claim 1 wherein the content of superabsorbent polymer particles in the lower ply is from about 30 to about 80% by weight. 21. The absorbent structure of claim 20 wherein the content of superabsorbent polymer particles in the lower ply is from about 40 to about 60% by weight. 22. The absorbent structure of claim 1 wherein all layers of each ply are fully integrated in the forming process. 23. The absorbent structure of claim 1 wherein each ply is airlaid. 24. The structure of claim 1 wherein superabsorbent polymer particles are placed in at least one of the strata of the upper ply in longitudinal discrete lanes along the length of the core, said lanes including from about 70% to 100% superabsorbent polymer particles, and said lanes being separated by adjacent lanes including fibers and a binder. 25. The structure of claim 1 wherein superabsorbent polymer particles are placed in the lower ply in longitudinal di screte lanes along the length of the core, said lanes including from about 70% to 100% superabsorbent polymer particles, and said lanes being separated by adjacent lanes including fibers and a binder. 26. An absorbent structure having wet integrity higher than about 4.0 mN/gsm, softness higher than 8.0/J, pliability higher than about 70/N, and providing a substantially dry liquid-accepting surface after receiving a quantity of liquid, the said structure comprising: a) an upper ply having an upper fluid receiving surface and a lower surface comprising: i) a top stratum including synthetic matrix fibers bonded with a binder, said matrix fibers having length of from about 2 to about 15 mm; ii) a middle stratum in fluid communication with the top stratum, the middle stratum including natural fibers and superabsorbent polymer particles; and iii) a bottom stratum in fluid communication with the middle stratum, including natural fibers and a binder; b) and a lower ply in fluid communication with the upper ply, the lower ply having an upper surface and a lower surface and including: i) a top stratum including natural fibers and a binder; and ii) a bottom stratum including natural fibers, superabsorbent polymer particles, and a binder, wherein: a) the lower surface of the upper ply has a surface area less than about 80% of the upper surface area of the lower ply; b) the top stratum of the upper ply exhibits essentially no fluid wicking capability; c) the basis weight of the top stratum of the upper ply is from about 20 gsm to about 120 gsm; d) the binder content (per cent by weight) of the top stratum of the upper ply is from about 5% to about 20%; e) the basis weight of the middle stratum of the upper ply is from about 50 gsm to about 1000 gsm; f) the binder content (per cent by weight) of the middle stratum of the upper ply is from about 1% to about 10%; g) the basis weight of the bottom stratum of the upper ply is from about 10 gsm to about 150 gsm; h) the binder content (per cent by weight) of the bottom stratum of the upper ply is from about 5% to about 15%; i) the content of superabsorbent particles in the upper ply is lower than the content of superabsorbent particles in the lower ply; j) the lower ply contains at least 30% superabsorbent particles based on the total basis weight of the lower ply; k) the top stratum of the lower ply contains from about 0% to about 20% superabsorbent particles based on the basis weight of the top stratum of the lower ply; l) the basis weight of the lower ply is from about 100 gsm to about 1000 gsm; m) the apparent density of the lower ply is about 0.15 g/cc to about 0.25 g/cc; n) the apparent density of the upper ply is lower than the apparent density of the lower ply; and o) the binder content (per cent by weight) of the lower ply is from about 1% to about 8%. 27. The absorbent structure of claim 26 wherein the length of the synthetic matrix fibers is from about 4 to about 12 mm. 28. The absorbent structure of claim 26 wherein the synthetic matrix fibers are from about 2 to about 30 denier. 29. The absorbent structure of claim 28 wherein the synthetic matrix fibers are from about 6 to about 15 denier. 30. The absorbent structure of claim 26 wherein the synthetic matrix fibers are selected from the group consisting of polyethylene, polypropylene, polyester, polyamide, cellulose acetate, rayon, and mixtures thereof. 31. The absorbent structure of claim 26 wherein the binder is selected from the group consisting of latex binders, thermoplastic powders, thermoplastic fibers, bicomponent fibers and mixtures thereof. 32. The absorbent structure of claim 26 wherein the binder is a water-soluble or water-dispersable bonding polymer agent. 33. The absorbent structure of claim 26 wherein the natural fibers are selected from the group consisting of cotton, softwood pulp, hardwood pulp, straw, keaf fibers, cellulose fibers modified by chemical, mechanical and/or thermal tr
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