Fabric crepe/draw process for producing absorbent sheet
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B31F-001/12
B31F-001/16
출원번호
UP-0108375
(2005-04-18)
등록번호
US-7789995
(2010-09-27)
발명자
/ 주소
Super, Guy H.
Edwards, Steven L.
McCullough, Stephen J.
Murray, Frank C.
출원인 / 주소
Georgia-Pacific Consumer Products, LP
대리인 / 주소
Ferrell, Michael W.
인용정보
피인용 횟수 :
79인용 특허 :
100
초록▼
A method of making a fabric-creped absorbent cellulosic sheet comprising: a) compactively dewatering a papermaking furnish to form a nascent web having an apparently random distribution of papermaking fiber; b) applying the dewatered web having the apparently random fiber distribution to a translati
A method of making a fabric-creped absorbent cellulosic sheet comprising: a) compactively dewatering a papermaking furnish to form a nascent web having an apparently random distribution of papermaking fiber; b) applying the dewatered web having the apparently random fiber distribution to a translating transfer surface moving at a first speed; c) fabric-creping the web from the transfer surface at a consistency of from about 30 to about 60 percent utilizing a patterned creping fabric, the creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric wherein the fabric is traveling at a second speed slower than the speed of said transfer surface, the fabric pattern, nip parameters, velocity delta and web consistency being selected such that the web is creped from the transfer surface and redistributed on the creping fabric to form a web with a drawable reticulum.
대표청구항▼
What is claimed is: 1. A method of making a fabric-creped absorbent cellulosic sheet comprising: a) compactively dewatering a papermaking furnish to form a nascent web having an apparently random distribution of papermaking fiber; b) applying the dewatered web having the apparently random fiber dis
What is claimed is: 1. A method of making a fabric-creped absorbent cellulosic sheet comprising: a) compactively dewatering a papermaking furnish to form a nascent web having an apparently random distribution of papermaking fiber; b) applying the dewatered web having the apparently random fiber distribution to a translating transfer surface moving at a transfer surface speed; and c) fabric-creping the web from the transfer surface at a consistency of from about 30 to about 60 percent utilizing a patterned creping fabric, the creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric wherein the fabric is traveling at a fabric speed slower than the speed of said transfer surface, the fabric pattern, nip parameters, velocity delta and web consistency being selected such that the web is creped from the transfer surface and wherein the creping fabric is adapted to contact the transfer surface and applies pressure to the web against the transfer surface such that the fibers of the web are redistributed on the creping fabric to form a web with a drawable reticulum having a plurality of interconnected regions of different local basis weights including at least (i) a plurality of fiber enriched regions of high local basis weight, interconnected by way of (ii) a plurality of lower local basis weight linking regions; wherein the drawable reticulum of the web is characterized in that it comprises a cohesive fiber matrix capable of increases in void volume when dried and subsequently drawn, and wherein the web exhibits absorbency suitable for use in tissue and towel products. 2. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, including drawing the dried web and increasing the bulk of the web. 3. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, including drawing the dried web and decreasing the sidedness of the web. 4. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, including drawing the dried web and attenuating the fiber-enriched regions of the web. 5. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, wherein the fabric creping and processing parameters are controlled such that the orientation of fibers in the fiber-enriched regions are biased in the CD. 6. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, wherein the fiber-enriched regions have a plurality of microfolds with fold lines extending transverse to the machine-direction, and further including drawing the dried web in the machine direction to expand the microfolds. 7. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, operated at a fabric crepe of from about 10 to about 300%. 8. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, operated at a fabric crepe of at least about 40%. 9. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, operated at a fabric crepe of at least about 60%. 10. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, operated at a fabric crepe of at least about 80%. 11. The method of making a fabric-creped absorbent cellulosic sheet according to claim 1, operated at a fabric crepe of 100% or more. 12. The method of making a fabric-creped absorbent cellulosic sheet according to claim 11, operated at a fabric crepe of at least about 125%. 13. The method according to claim 1, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least about ⅛″. 14. The method according to claim 1, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least ½″. 15. The method according to claim 1, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ⅛″ to about 2″. 16. The method according to claim 1, wherein the creping fabric is adapted to contact a creping roll over a nip width of from ½″ to 2″. 17. The method according to claim 1, wherein the creping step takes place under pressure of 20 PLI or more. 18. The method according to claim 1, wherein the creping step takes place under a pressure of from 20-200 pounds per linear inch. 19. The method according to claim 1, wherein the creping step takes place under a pressure of from 40-70 pounds per linear inch. 20. A method of making a fabric-creped absorbent cellulosic sheet comprising: a) compactively dewatering a papermaking furnish to form a nascent web having an apparently random distribution of papermaking fiber; b) applying the dewatered web having the apparently random fiber distribution to a translating transfer surface moving at a transfer surface speed; c) fabric-creping the web from the transfer surface at a consistency of from about 30 to about 60 percent utilizing a patterned creping fabric, the creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric wherein the fabric is traveling at a fabric speed slower than the speed of said transfer surface, the fabric pattern, nip parameters, velocity delta and web consistency being selected such that the web is creped from the transfer surface and wherein the creping fabric is adapted to contact the transfer surface and applies pressure to the web against the transfer surface such that the fibers of the web are redistributed on the creping fabric to form a web with a drawable reticulum having a plurality of interconnected regions of different local basis weights including at least (i) a plurality of fiber enriched regions of high local basis weight, interconnected by way of (ii) a plurality of lower local basis weight linking regions; wherein the drawable reticulum of the web is characterized in that it comprises a cohesive fiber matrix capable of increases in void volume upon dry-drawing, d) applying the web to a drying cylinder; e) drying the web on the drying cylinder; f) removing the web from the drying cylinder; wherein steps (d), (e) and (f) are performed so as to substantially preserve the drawable fiber reticulum, and g) drawing the dried web, wherein the web exhibits absorbency suitable for use in tissue and towel products. 21. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the drying cylinder is a Yankee dryer. 22. The method of making a fabric-creped absorbent cellulosic sheet according to claim 21, wherein the web is removed from the Yankee dryer without substantial creping. 23. The method of making a fabric-creped absorbent cellulosic sheet according to claim 21, wherein subsequent to startup, the web is removed from the Yankee dryer without a creping blade. 24. The method according to claim 20, operated at a fabric crepe of from about 10% to about 100% and a crepe recovery of from about 10% to about 100%. 25. The method according to claim 20, operated at a crepe recovery of at least about 20%. 26. The method according to claim 20, operated at a crepe recovery of at least about 30%. 27. The method according to claim 20, operated at a crepe recovery of at least about 40%. 28. The method according to claim 20, operated at a crepe recovery of at least about 50%. 29. The method according to claim 20, operated at a crepe recovery of at least about 60%. 30. The method according to claim 20, operated at a crepe recovery of at least about 80%. 31. The method according to claim 20, operated at a crepe recovery of at least about 95%. 32. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the web comprises secondary fiber. 33. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the step of creping the web from the transfer surface is carried out with a creping fabric. 34. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the web is drawn on-line. 35. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the web is drawn between a first roll operated at a machine-direction velocity greater than the creping fabric velocity and a second roll operated at a machine-direction velocity greater than the first roll. 36. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the dried web is calendered on-line. 37. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the web is dried to a consistency of at least about 90% prior to drawing. 38. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the web is dried to a consistency of at least about 92% prior to drawing. 39. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the fabric creping and processing parameters are controlled such that the ratio of percent decrease in caliper/percent decrease in basis weight of the web is less than about 0.85 upon drawing the web. 40. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the fabric creping and processing parameters are controlled such that the ratio of percent decrease in caliper/percent decrease in basis weight of the web is less than about 0.7 upon drawing the web. 41. The method of making a fabric-creped absorbent cellulosic sheet according to claim 20, wherein the fabric creping and processing parameters are controlled such that the ratio of percent decrease in caliper/percent decrease in basis weight of the web is less than about 0.6 upon drawing the web. 42. The method according to claim 20, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least about ⅛″. 43. The method according to claim 20, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least ½″. 44. The method according to claim 20, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ⅛″ to about 2″. 45. The method according to claim 20, wherein the creping fabric is adapted to contact a creping roll over a nip width of from ½″ to 2″. 46. The method according to claim 20, wherein the creping step takes place under pressure of 20 PLI or more. 47. The method according to claim 20, wherein the creping step takes place under a pressure of from 20-200 pounds per linear inch. 48. The method according to claim 20, wherein the creping step takes place under a pressure of from 40-70 pounds per linear inch. 49. A method of making a fabric-creped absorbent cellulosic sheet comprising: a) compactively dewatering a papermaking furnish to form a nascent web having an apparently random distribution of papermaking fiber; b) applying the dewatered web having the apparently random fiber distribution to a translating transfer surface moving at a transfer surface speed; and c) fabric-creping the web from the transfer surface at a consistency of from about 30 to about 60 percent utilizing a creping fabric, the creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric wherein the fabric is traveling at a fabric speed slower than the speed of said transfer surface, the fabric pattern, nip parameters, velocity delta and web consistency being selected such that the web is creped from the transfer surface and wherein the creping fabric is adapted to contact the transfer surface and applies pressure to the web against the transfer surface such that the fibers of the web are redistributed on the creping fabric to form a web with a drawable reticulum having a plurality of interconnected regions of different local basis weights including at least (i) a plurality of fiber enriched regions of high local basis weight, interconnected by way of (ii) a plurality of lower local basis weight linking regions; and d) applying vacuum to the web to increase its CD stretch by at least about 5% with respect to a like web produced by like means, but without applied vacuum after fabric creping, wherein the web exhibits absorbency suitable for use in tissue and towel products. 50. The method according to claim 49, wherein vacuum is applied to the web while it is held in the creping fabric and the creping fabric is selected to increase CD stretch when vacuum is applied to the web. 51. The method according to claim 49, wherein at least 5 inches Hg of vacuum is applied. 52. The method according to claim 49, wherein at least 10 inches Hg of vacuum is applied. 53. The method according to claim 49, wherein at least 15 inches Hg of vacuum is applied. 54. The method according to claim 49, wherein at least 20 inches Hg of vacuum is applied. 55. The method according to claim 49, wherein at least 25 inches Hg of vacuum is applied. 56. The method according to claim 49, wherein applying vacuum to the web increases the CD stretch of the web by at least about 7.5 percent with respect to a like web produced by the same means, but without having vacuum applied thereto after fabric creping. 57. The method according to claim 49, wherein applying vacuum to the web increases the CD stretch of the web by at least about 10 percent with respect to a like web produced by the same means, but without having vacuum applied thereto after fabric creping. 58. The method according to claim 49, wherein applying vacuum to the web increases the CD stretch of the web by at least about 20 percent with respect to a like web produced by the same means, but without having vacuum applied thereto after fabric creping. 59. The method according to claim 49, wherein applying vacuum to the web increases the CD stretch of the web by at least about 35 percent with respect to a like web produced by the same means, but without having vacuum applied thereto after fabric creping. 60. The method according to claim 49, wherein applying vacuum to the web increases the CD stretch of the web by at least about 50 percent with respect to a like web produced by the same means, but without having vacuum applied thereto after fabric creping. 61. The method according to claim 49, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least about ⅛″. 62. The method according to claim 49, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least ½″. 63. The method according to claim 49, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ⅛″ to about 2″. 64. The method according to claim 49, wherein the creping fabric is adapted to contact a creping roll over a nip width of from ½″ to 2″. 65. The method according to claim 49, wherein the creping step takes place under pressure of 20 PLI or more. 66. The method according to claim 49, wherein the creping step takes place under a pressure of from 20-200 pounds per linear inch. 67. The method according to claim 49, wherein the creping step takes place under a pressure of from 40-70 pounds per linear inch.
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Dyer, Thomas Joseph; Lostocco, Michael R.; Nickel, Deborah Joy; Runge, Troy M.; Zwick, Kenneth John; Goulet, Mike T.; Timm, Jeffrey J.; Clough, Perry H.; Rekoske, Michael J., Wiping products having enhanced cleaning abilities.
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