[미국특허]
Belt-creped, variable local basis weight absorbent sheet prepared with perforated polymeric belt
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B31F-001/12
B31F-001/07
출원번호
US-0694650
(2010-01-27)
등록번호
US-8293072
(2012-10-23)
발명자
/ 주소
Super, Guy H.
Ruthven, Paul J.
McCullough, Stephen J.
Sze, Daniel H.
Wendt, Greg A.
Miller, Joseph H.
출원인 / 주소
Georgia-Pacific Consumer Products LP
대리인 / 주소
Bozek, Laura L.
인용정보
피인용 횟수 :
33인용 특허 :
275
초록▼
An absorbent sheet of cellulosic fibers with upper and lower sides includes (i) a plurality of fiber-enriched hollow domed regions on the upper side of the sheet having a relatively high local basis weight, (ii) connecting regions of relatively lower local basis weight forming a network interconnect
An absorbent sheet of cellulosic fibers with upper and lower sides includes (i) a plurality of fiber-enriched hollow domed regions on the upper side of the sheet having a relatively high local basis weight, (ii) connecting regions of relatively lower local basis weight forming a network interconnecting the relatively high local basis weight domed regions of the sheet, and (iii) transition areas with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the domed regions.
대표청구항▼
1. An absorbent sheet of cellulosic fibers that has an upper side and a lower side, the absorbent sheet comprising: (i) a plurality of fiber-enriched hollow domed regions projecting from the upper side of the sheet, the hollow domed regions having sidewalls and a local basis weight that is higher th
1. An absorbent sheet of cellulosic fibers that has an upper side and a lower side, the absorbent sheet comprising: (i) a plurality of fiber-enriched hollow domed regions projecting from the upper side of the sheet, the hollow domed regions having sidewalls and a local basis weight that is higher than a mean basis weight of the sheet;(ii) connecting regions forming a network interconnecting the hollow domed regions of the sheet, the connecting regions having a local basis weight that is lower than the local basis weight of the hollow domed regions; and(iii) transition areas with consolidated fibrous regions that transition from the connecting regions into the hollow domed regions, by extending upwardly and inwardly from the connecting regions into the sidewalls of the hollow domed regions. 2. The absorbent sheet according to claim 1, wherein the consolidated fibrous regions are saddle shaped. 3. The absorbent sheet according to claim 1, wherein the fiber-enriched hollow domed regions exhibit a local basis weight of at least 5% higher than the mean basis weight of the sheet. 4. The absorbent sheet according to claim 1, wherein the fiber-enriched hollow domed regions exhibit a local basis weight of at least 10% higher than the mean basis weight of the sheet. 5. The absorbent sheet according to claim 1, wherein at least a portion of one of the fiber-enriched hollow domed regions and the transition areas exhibits a cross machine direction (CD) fiber orientation bias. 6. The absorbent sheet according to claim 1, wherein at least a portion of the connecting regions exhibits a cross machine direction (CD) fiber orientation bias. 7. The absorbent sheet according to claim 1, wherein the connecting regions define substantially a single plane. 8. The absorbent sheet according to claim 1, wherein the hollow domed regions have caps and at least a portion of the fiber of the sidewalls of the hollow domed regions exhibits a fiber orientation bias in a direction toward the caps of the hollow domed regions. 9. The absorbent sheet according to claim 1, wherein at least a portion of the fibrous regions of the sidewalls of the hollow domed regions exhibits a matted structure on both their outer and inner surfaces. 10. The absorbent sheet according to claim 1, wherein the absorbent sheet exhibits a basis weight variation that oscillates about a substantially constant mean basis weight value. 11. The absorbent sheet according to claim 1, wherein the absorbent sheet has a basis weight that varies in a two-dimensional repeating pattern. 12. The absorbent sheet according to claim 11, wherein the two-dimensional repeating pattern comprises: a field having a substantially uniform basis weight; and(ii) a plurality of higher basis weight regions dispersed in a repeating pattern over the field. 13. The absorbent sheet according to claim 12, wherein the plurality of higher basis weight regions comprise a plurality of discrete domed regions. 14. The absorbent sheet according to claim 1, wherein the absorbent sheet is converted into a tissue having a specific bulk of greater than 6.25 (mils/8 sheet)/(lb/ream). 15. The absorbent sheet according to claim 1, wherein the absorbent sheet is converted into a towel having a specific bulk of more than 7.75 (mils/8 sheet)/(lb/ream). 16. An absorbent cellulosic sheet that has an upper surface and a lower surface, the absorbent sheet comprising: (i) a plurality of fiber-enriched hollow domed regions protruding from the upper surface of the sheet, the hollow domed regions having sidewalls of a local basis weight that is higher than a mean basis weight of the sheet and being formed along at least a leading edge thereof;(ii) connecting regions forming a network interconnecting the fiber-enriched hollow domed regions of the sheet, the connecting regions having a local basis weight that is lower than the local basis weight of the sidewalls; and(iii) transition areas comprising consolidated groupings of fibers that extend upwardly from the connecting regions into the sidewalls of the fiber-enriched hollow domed regions along at least the leading edge thereof. 17. The absorbent sheet according to claim 16, wherein the consolidated groupings of fibers extend inwardly and deflect upwardly from the connecting regions into the sidewalls of the fiber-enriched hollow domed regions along at least the leading edge thereof. 18. The absorbent sheet according to claim 16, wherein the fiber-enriched hollow domed regions include an inclined sidewall. 19. The absorbent sheet according to claim 16, wherein the fiber-enriched hollow domed regions exhibit a local basis weight of at least 5% higher than the mean basis weight of the sheet. 20. The absorbent sheet according to claim 16, wherein the fiber-enriched hollow domed regions exhibit a local basis weight of at least 10% higher than the mean basis weight of the sheet. 21. The absorbent sheet according to claim 16, wherein the sidewalls of the fiber-enriched hollow domed regions comprise regions of consolidated fiber that extend upwardly and inwardly. 22. The absorbent sheet according to claim 16, further comprising consolidated saddle shaped groupings of fibers extending upwardly from the connecting regions into the sidewalls of the fiber-enriched hollow domed regions along at least the leading edge thereof. 23. The absorbent sheet according to claim 16, wherein the sidewalls of the fiber-enriched hollow domed regions comprise consolidated groupings of fibers that form saddle shaped regions extending at least partially around the hollow domed regions. 24. The absorbent sheet according to claim 16, wherein the sidewalls extend upwardly and inwardly forming saddle shaped, highly densified consolidated fibrous regions about bases of the hollow domed regions. 25. The absorbent sheet according to claim 16, wherein the transition areas are saddle shaped with the consolidated groupings of fibers extending upwardly and inwardly from the connecting regions into the sidewalls of the hollow domed regions. 26. The absorbent sheet according to claim 25, wherein the saddle shaped transition areas regions that at least partially circumscribe bases of the hollow domed regions. 27. The absorbent sheet according to claim 26, wherein the saddle shaped transition areas form regions that are densified in a bowed shape around a portion of the bases of the hollow domed regions. 28. An absorbent sheet of cellulosic fibers, the absorbent sheet comprising: (i) a plurality of fiber-enriched regions of a local basis weight higher than a mean basis weight of the sheet and including (A) hollow domed portions and (B) pileated fiber-enriched portions with a cross machine direction (CD) fiber orientation bias adjacent to the hollow domed portions, the fiber-enriched portions being interconnected with(ii) connecting regions of a local basis weight that is lower than the local basis weight of the fiber-enriched regions,wherein the hollow domed portions have upwardly projecting densified sidewalls, at least a portion of each upwardly projecting densified sidewall comprising a densified region that extends inwardly. 29. The absorbent sheet according to claim 28, wherein the sheet includes transition areas with consolidated fibrous regions that transition from the connecting regions to the fiber-enriched regions. 30. An absorbent sheet of cellulosic fibers that has an upper side and a lower side, the absorbent sheet comprising: (i) a plurality of fiber-enriched hollow domed regions having densified caps, the fiber-enriched hollow domed regions projecting from the upper side of the sheet and having sidewalls with a local basis weight that is higher than a mean basis weight of the sheet;(ii) connecting regions forming a network interconnecting the hollow domed regions of the sheet, the connecting regions having a local basis weight that is lower than the local basis weight of the hollow domed regions; and(iii) transition areas that transition from the connecting regions into the hollow domed regions by extending upwardly and inwardly from the connecting regions into the sidewalls of the hollow domed regions. 31. The absorbent sheet according to claim 30, wherein the densified caps of the fiber-enriched hollow domed regions have a general shape of a portion of a spheroidal shell. 32. The absorbent sheet according to claim 30, wherein the densified caps of the fiber-enriched hollow domed regions have a general shape of an apical portion of a spheroidal shell.
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Super, Guy H.; Ruthven, Paul J.; McCullough, Stephen J.; Sze, Daniel H.; Wendt, Greg A.; Miller, Joseph H., Methods of making a belt-creped absorbent cellulosic sheet prepared with a perforated polymeric belt.
Super, Guy H.; Ruthven, Paul J.; McCullough, Stephen J.; Sze, Daniel H.; Wendt, Greg A.; Miller, Joseph H., Methods of making a belt-creped absorbent cellulosic sheet prepared with a perforated polymeric belt.
Edwards, Steven L.; Super, Guy H.; McCullough, Stephen J.; Reeb, Ronald R.; Chou, Hung Liang; Yeh, Kang Chang; Dwiggins, John H.; Harper, Frank D., Multi-ply absorbent sheet of cellulosic fibers.
Miller, Joseph H.; Sumnicht, Daniel W.; Oriaran, T. Philips; Schuh, Brian J.; Ramirez, Alberto J.; Lee, Jeffrey A., Multi-ply bath tissue with temporary wet strength resin and/or a particular lignin content.
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