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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0220244 (2014-03-20) |
등록번호 | US-8980052 (2015-03-17) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 1 인용 특허 : 255 |
A method of making a fabric-creped absorbent cellulosic sheet. A papermaking furnish is compactively dewatered to form a nascent web having an apparently random distribution of papermaking fiber. The dewatered web is applied to a translating transfer surface that is moving at a transfer surface spee
A method of making a fabric-creped absorbent cellulosic sheet. A papermaking furnish is compactively dewatered to form a nascent web having an apparently random distribution of papermaking fiber. The dewatered web is applied to a translating transfer surface that is moving at a transfer surface speed. The web is fabric creped from the transfer surface utilizing a patterned creping fabric. The fabric creping step occurs under pressure in a fabric creping nip defined between the transfer surface and the creping fabric. The creping fabric travels at a fabric speed that is slower than the transfer surface speed. The creping fabric contacts 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.
1. A method of making a fabric-creped absorbent cellulosic sheet, the method 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 distributio
1. A method of making a fabric-creped absorbent cellulosic sheet, the method 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 that is moving at a transfer surface speed; and(c) fabric creping the web from the transfer surface at a consistency of from about 30 percent to about 60 percent utilizing a patterned creping fabric, the fabric creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric, the creping fabric traveling at a fabric speed that is slower than the transfer surface speed, 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 comprising a cohesive fiber matrix capable of increasing in void volume, the drawable reticulum having a plurality of interconnected regions of different local basis weights including at least: (i) a plurality of fiber-enriched regions having fibers oriented in a cross machine direction (CD) of the sheet, and(ii) a plurality of linking regions that link corresponding ones of the fiber-enriched regions together in linking directions, the linking regions having fibers oriented in the linking directions. 2. The method according to claim 1, further comprising drying the web to form a dried web, and drawing the dried web in order to increase the bulk of the web. 3. The method according to claim 1, further comprising drying the web to form a dried web, and drawing the dried web in order to decrease the sidedness of the web. 4. The method according to claim 1, further comprising drying the web to form a dried web, and drawing the dried web in order to attenuate the fiber-enriched regions of the web. 5. The method according to claim 1, wherein the plurality of fiber-enriched regions have a high local basis weight, and the plurality of linking regions have a local basis weight that is lower than the local basis weight of the plurality of fiber-enriched regions. 6. The method according to claim 5, further comprising controlling the fabric creping and processing parameters such that the orientation of fibers in the fiber-enriched regions is biased in the cross machine direction. 7. The method according to claim 5, wherein the fiber-enriched regions have a plurality of microfolds with fold lines extending transverse to the machine direction, and further comprising drying the web to form a dried web, and drawing the dried web in the machine direction to expand the microfolds. 8. The method according to claim 1, the method being operated at a fabric crepe of from about 10% to about 300%. 9. The method according to claim 1, the method being operated at a fabric crepe of at least about 40%. 10. The method according to claim 1, the method being operated at a fabric crepe of at least about 60%. 11. The method according to claim 1, the method being operated at a fabric crepe of at least about 80%. 12. The method according to claim 1, the method being operated at a fabric crepe of 100% or more. 13. The method according to claim 1, the method being operated at a fabric crepe of at least about 125%. 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 about ⅛″. 15. 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 ½″. 16. 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″. 17. The method according to claim 1, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ½″ to about 2″. 18. The method according to claim 1, wherein the creping step takes place under a pressure of at least 20 pounds per linear inch. 19. The method according to claim 1, wherein the creping step takes place under a pressure from 20 pounds per linear inch to about 200 pounds per linear inch. 20. The method according to claim 1, wherein the creping step takes place under a pressure of from 40 pounds per linear inch to 70 pounds per linear inch. 21. The method according to claim 1, further comprising drying the web to form a dried web, and drawing the dried web in order to increase the void volume of the web. 22. A method of making a fabric-creped absorbent cellulosic sheet, the method 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 that is moving at a transfer surface speed;(c) fabric creping the web from the transfer surface at a consistency of from about 30 percent to about 60 percent utilizing a patterned creping fabric, the fabric creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric, the fabric traveling at a fabric speed that is slower than the transfer surface speed, 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 fiber reticulum comprising a cohesive fiber matrix capable of increasing in void volume, the drawable reticulum having a plurality of interconnected regions of different local basis weights including at least: (i) a plurality of fiber-enriched regions having fibers oriented in a cross machine direction (CD) of the sheet, and(ii) a plurality of linking regions that link corresponding ones of the fiber-enriched regions together in linking directions, the linking regions having fibers oriented in the linking directions;(d) applying the web to a drying cylinder;(e) drying the web on the drying cylinder to form a dried web; and(f) removing the dried web from the drying cylinder,wherein steps (d), (e), and (f) are performed so as to substantially preserve the drawable fiber reticulum. 23. The method according to claim 22, wherein the drying cylinder is a Yankee dryer. 24. The method according to claim 23, further comprising removing the web from the Yankee drying without substantially creping the web. 25. The method according to claim 23, wherein, subsequent to startup, further comprising removing the web from the Yankee dryer without a creping blade. 26. The method according to claim 22, the method being operated at a fabric crepe of from about 10% to about 100% and a crepe recovery of from about 10% to about 100%. 27. The method according to claim 22, the method being operated at a crepe recovery of at least about 20%. 28. The method according to claim 22, the method being operated at a crepe recovery of at least about 30%. 29. The method according to claim 22, the method being operated at a crepe recovery of at least about 40%. 30. The method according to claim 22, the method being operated at a crepe recovery of at least about 50%. 31. The method according to claim 22, the method being operated at a creped recovery of at least about 60%. 32. The method according to claim 22, the method being operated at a crepe recovery of at least about 80%. 33. The method according to claim 22, the method being operated at a crepe recovery of at least about 95%. 34. The method according to claim 22, wherein the web comprises secondary fibers. 35. The method according to claim 22, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least about ⅛″. 36. The method according to claim 22, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least about ½″. 37. The method according to claim 22, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ⅛″ to about 2″. 38. The method according to claim 22, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ½″ to about 2″. 39. The method according to claim 22, wherein the creping step takes place under a pressure of 20 pounds per linear inch. 40. The method according to claim 22, wherein the creping step takes place under a pressure of from 20 pounds per linear inch to 200 pounds per linear inch. 41. The method according to claim 22, wherein the creping step takes place under a pressure of from 40 pounds per linear inch to 70 pounds per linear inch. 42. The method according to claim 22, further comprising drawing the dried web in order to increase the void volume of the web. 43. A method of making a fabric-creped absorbent cellulosic sheet, the method 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 that is moving at a transfer surface speed; and(c) fabric creping the web from the transfer surface at a consistency of from about 30 percent to about 60 percent utilizing a patterned creping fabric, the fabric creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric, the fabric traveling at a fabric speed that is slower than the transfer surface speed, 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 comprising a cohesive fiber matrix capable of increasing in void volume, the drawable reticulum having a plurality of interconnected regions of different local basis weights including at least: (i) a plurality of fiber-enriched regions having fibers oriented in a cross machine direction (CD) of the sheet, and(ii) a plurality of linking regions that link corresponding ones of the fiber-enriched regions together in linking directions, the linking regions having fibers oriented in the linking directions; and(d) applying a vacuum to the web to increase the stretch of the web in the cross machine direction. 44. The method according to claim 43, wherein the vacuum is applied to the web while the web is held in the creping fabric, and the creping fabric is selected to increase the stretch of the web in the cross machine direction when a vacuum is applied to the web. 45. The method according to claim 43, wherein at least 5 inches Hg of vacuum is applied. 46. The method according to claim 43, wherein at least 10 inches Hg of vacuum is applied. 47. The method according to claim 43, wherein at least 15 inches of Hg of vacuum is applied. 48. The method according to claim 43, wherein at least 20 inches of Hg of vacuum is applied. 49. The method according to claim 43, wherein at least 25 inches Hg of vacuum is applied. 50. The method according to claim 43, wherein applying the vacuum to the web increases the stretch of the web in the cross machine direction by at least about 5 percent with respect to a like web produced by a similar method, but without having a vacuum applied thereto after fabric creping. 51. The method according to claim 43, wherein applying the vacuum to the web increases the stretch of the web in the cross machine direction by at least about 7.5 percent with respect to a like web produced by a similar method, but without having a vacuum applied thereto after fabric creping. 52. The method according to claim 43, wherein applying the vacuum to the web increases the stretch of the web in the cross machine direction by at least about 10 percent with respect to a like web produced by a similar method, but without having a vacuum applied thereto after fabric creping. 53. The method according to claim 43, wherein applying the vacuum to the web increases the stretch of the web in the cross machine direction by at least about 20 percent with respect to a like web produced by a similar method, but without having a vacuum applied thereto after fabric creping. 54. The method according to claim 43, wherein applying the vacuum to the web increases the stretch of the web in the cross machine direction by at least about 35 percent with respect to a like web produced by a similar method, but without having a vacuum applied thereto after fabric creping. 55. The method according to claim 43, wherein applying the vacuum to the web increases the stretch of the web in the cross machine direction by at least about 50 percent with respect to a like web produced by a similar method, but without having a vacuum applied thereto after fabric creping. 56. The method according to claim 43, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least about ⅛″. 57. The method according to claim 43, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least about ½″. 58. The method according to claim 43, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ⅛″ to about 2″. 59. The method according to claim 43, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ½″ to about 2″. 60. The method according to claim 43, wherein the creping step takes place under a pressure of 20 pounds per linear inch. 61. The method according to claim 43, wherein the creping step takes place under a pressure of from 20 pounds per linear inch to 200 pounds per linear inch. 62. The method according to claim 43, wherein the creping step takes place under a pressure from 40 pounds per linear inch to 70 pounds per linear inch. 63. The method according to claim 43, further comprising drying the web to form a dried web, and drawing the dried web in order to increase the void volume of the web. 64. A method of making a fabric-creped absorbent cellulosic sheet the method 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 that is moving at a transfer surface speed;(c) fabric creping the web from the transfer surface at a consistency of from about 30 percent to about 60 percent utilizing a patterned creping fabric, the fabric creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric, the creping fabric traveling at a fabric speed that is slower than the transfer surface speed, 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 comprising a cohesive fiber matrix capable of increasing in void volume when dried and subsequently drawn, the drawable reticulum having a plurality of interconnected regions of different local basis weights including at least: (i) a plurality of fiber-enriched regions having fibers oriented in a cross machine direction (CD) of the sheet, and(ii) a plurality of linking regions that link corresponding ones of the fiber-enriched regions together in linking directions, the linking regions having fibers oriented in the linking directions;(d) applying the web to a drying cylinder;(e) drying the web on the drying cylinder to form a dried web;(f) removing the dried 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 in order to increase the void volume of the web. 65. The method according to claim 64, wherein the drying cylinder is a Yankee dryer. 66. The method according to claim 65, further comprising removing the web from the Yankee drying without substantially creping the web. 67. The method according to claim 65, wherein, subsequent to startup, further comprising removing the web from the Yankee dryer without a creping blade. 68. The method according to claim 64, the method being operated at a fabric crepe of from about 10% to about 100% and a crepe recovery of from about 10% to about 100%. 69. The method according to claim 64, the method being operated at a crepe recovery of at least about 20%. 70. The method according to claim 64, the method being operated at a crepe recovery of at least about 30%. 71. The method according to claim 64, the method being operated at a crepe recovery of at least about 40%. 72. The method according to claim 64, the method being operated at a crepe recovery of at least about 50%. 73. The method according to claim 64, the method being operated at a creped recovery of at least about 60%. 74. The method according to claim 64, the method being operated at a crepe recovery of at least about 80%. 75. The method according to claim 64, the method being operated at a crepe recovery of at least about 95%. 76. The method according to claim 64, wherein the web comprises secondary fibers. 77. The method according to claim 64, wherein the web is drawn on-line. 78. The method according to claim 64, wherein the web is drawn between a first roll that is operated at a machine direction velocity that is greater than the fabric speed, and a second roll that is operated at a machine direction velocity that is greater than that of the first roll. 79. The method according to claim 64, further comprising calendering the dried web on-line. 80. The method according to claim 64, wherein the web is dried to a consistency of at least about 90% prior to drawing. 81. The method according to claim 64, wherein the web is dried to a consistency of at least about 92% prior to drawing. 82. The method according to claim 64, further comprising controlling the fabric creping and processing parameters 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. 83. The method according to claim 64, further comprising controlling the fabric creping and processing parameters 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. 84. The method according to claim 64, further comprising controlling the fabric creping and processing parameters such that the ratio of percent decrease in caliper/percent decrease in basis weigh of the web is less than about 0.6 upon drawing the web. 85. The method according to claim 64, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least about ⅛″. 86. The method according to claim 64, wherein the creping fabric is adapted to contact a creping roll over a nip width of at least about ½″. 87. The method according to claim 64, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ⅛″ to about 2″. 88. The method according to claim 64, wherein the creping fabric is adapted to contact a creping roll over a nip width of from about ½″ to about 2″. 89. The method according to claim 64, wherein the creping step takes place under a pressure of 20 pounds per linear inch. 90. The method according to claim 64, wherein the creping step takes place under a pressure of from 20 pounds per linear inch to 200 pounds per linear inch. 91. The method according to claim 64, wherein the creping step takes place under a pressure of from 40 pounds per linear inch to 70 pounds per linear inch.
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