[미국특허]
Methods of making a belt-creped absorbent cellulosic sheet prepared with a perforated polymeric belt
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B31F-001/16
B31F-001/12
B31F-001/07
D21H-027/02
D21H-027/00
D21F-011/00
D21F-001/00
출원번호
US-0933254
(2013-07-02)
등록번호
US-8968516
(2015-03-03)
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 :
23인용 특허 :
312
초록▼
A method of making a belt-creped absorbent cellulosic sheet that has an upper surface and a lower surface. A papermaking furnish is compactively dewatered to form a dewatered web having an apparently random distribution of papermaking fiber orientation. The dewatered web is applied to a translating
A method of making a belt-creped absorbent cellulosic sheet that has an upper surface and a lower surface. A papermaking furnish is compactively dewatered to form a dewatered web having an apparently random distribution of papermaking fiber orientation. The dewatered web is applied to a translating transfer surface. The web is belt creped from the transfer surface at a consistency of from about 30% to about 60% utilizing a generally planar polymeric creping belt having a plurality of perforations. The belt-creping step occurs under pressure in a belt creping nip defined between the transfer surface and the creping belt. The belt is traveling at a belt speed that is slower than the speed of the transfer surface, and the web is creped from the transfer surface and redistributed on the creping belt to form a web.
대표청구항▼
1. A method of making a belt-creped absorbent cellulosic sheet that has an upper surface and a lower surface, the method comprising: (a) compactively dewatering a papermaking furnish to form a dewatered web having an apparently random distribution of papermaking fiber orientation;(b) applying the de
1. A method of making a belt-creped absorbent cellulosic sheet that has an upper surface and a lower surface, the method comprising: (a) compactively dewatering a papermaking furnish to form a dewatered web having an apparently random distribution of papermaking fiber orientation;(b) applying the dewatered web having the apparently random distribution of papermaking fiber orientation to a translating transfer surface that is moving at a transfer surface speed;(c) belt-creping the web from the transfer surface at a consistency of from about 30% to about 60% utilizing a generally planar polymeric creping belt provided with a plurality of tapered perforations through the creping belt, the belt-creping step occurring under pressure in a belt creping nip defined between the transfer surface and the creping belt, wherein the creping belt is traveling at a belt speed that is slower than the transfer surface speed, and the web is creped from the transfer surface and redistributed on the creping belt to form a web 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; 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 formed along at least the leading edge thereof; and(d) drying the web to produce the belt-creped absorbent cellulosic sheet. 2. The method according to claim 1, further comprising applying a vacuum to the creping belt while the web is held on the belt, in order to expand the web prior to drying the web in the drying step. 3. The method according to claim 1, wherein the connecting regions have a local basis weight that is lower than the local basis weight of the sidewalls. 4. The method according to claim 1, wherein the creping belt has a non-random pattern of perforations. 5. The method according to claim 4, wherein the non-random pattern of perforations is staggered. 6. The method according to claim 1, wherein the tapered perforations have openings on a creping side of the creping belt that are larger than their openings on a machine side of the creping belt. 7. The method according to claim 6, wherein the creping belt defines raised lips around the openings of the perforations on the creping side of the belt. 8. The method according to claim 7, wherein the raised lips have a height from the surrounding areas of the belt of from about 10% to 30% of the belt thickness. 9. The method according to claim 1, wherein the tapered perforations of the creping belt have oval-shaped openings with major axes aligned in the cross-machine direction. 10. The method according to claim 1, wherein the creping belt has a thickness of from 0.2 mm to 1.5 mm. 11. The method according to claim 1, wherein the creping belt is of a generally unitary construction made from a polymer sheet selected from one of a solid polymer sheet, a reinforced polymer sheet, and a filled polymer sheet. 12. The method according to claim 1, wherein the creping belt is made from a monolithic polyester sheet by way of laser drilling. 13. A method of making a belt-creped absorbent cellulosic sheet that has an upper side and a lower side, the method comprising: (a) compactively dewatering a papermaking furnish to form a dewatered web having an apparently random distribution of papermaking fiber orientation;(b) applying the dewatered web having the apparently random distribution of papermaking fiber orientation to a translating transfer surface that is moving at a transfer surface speed;(c) belt-creping the web from the transfer surface at a consistency of from about 30% to about 60% utilizing a generally planar polymeric creping belt provided with a plurality of tapered perforations through the creping belt, the belt-creping step occurring under pressure in a belt creping nip defined between the transfer surface and the creping belt, wherein the creping belt is traveling at a belt speed that is slower than the transfer surface speed, and the web is creped from the transfer surface and redistributed on the creping belt to form a web having a plurality of interconnected regions of different local basis weights including at least: (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 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 hollow domed regions; and(iii) transition areas that transition from the connecting regions into the fiber-enriched hollow domed regions by extending upwardly and inwardly from the connecting regions into the sidewalls of the hollow domed regions; and(d) drying the web to produce the belt-creped absorbent cellulosic sheet. 14. The method according to claim 13, further comprising applying a vacuum to the creping belt while the web is held on the belt, in order to expand the web prior to drying the web in the drying step. 15. The method according to claim 13, wherein the creping belt has a non-random pattern of perforations. 16. The method according to claim 15, wherein the non-random pattern of perforations is staggered. 17. The method according to claim 13, wherein the tapered perforations have openings on a creping side of the creping belt that are larger than their openings on a machine side of the creping belt. 18. The method according to claim 17, wherein the creping belt defines raised lips around the openings of the perforations on the creping side of the belt. 19. The method according to claim 18, wherein the raised lips have a height from the surrounding areas of the belt of from about 10% to about 30% of the belt thickness. 20. The method according to claim 13, wherein the tapered perforations of the creping belt have oval-shaped openings with major axes aligned in the cross-machine direction. 21. The method according to claim 13, wherein the creping belt has a thickness of from 0.2 mm to 1.5 mm. 22. The method according to claim 13, wherein the creping belt is of a generally unitary construction made from a polymer sheet selected from one of a solid polymer sheet, a reinforced polymer sheet, and a filled polymer sheet. 23. The method according to claim 13, wherein the creping belt is made from a monolithic polyester sheet by way of laser drilling. 24. The method according to claim 13, wherein the densified caps of the fiber-enriched hollow domed regions have a general shape of a portion of a spheroidal shell. 25. The method according to claim 13, 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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Edwards, Steven L.; McCullough, Stephen J., Wet-pressed tissue and towel products with elevated CD stretch and low tensile ratios made with a high solids fabric crepe process.
Edwards, Steven L.; McCullough, Stephen J., Wet-pressed tissue and towel products with elevated CD stretch and low tensile ratios made with a high solids fabric crepe process.
Fung-jou Chen ; Mark Alan Burazin ; Michael Alan Hermans ; David Henry Hollenberg ; Richard Joseph Kamps ; Bernhardt Edward Kressner ; Jeffrey Dean Lindsay, Wet-resilient webs and disposable articles made therewith.
Bryan Philip S. (Webster NY) Lambert Patrick M. (Rochester NY) Towers Christine M. (Rochester NY) Jarrold Gregory S. (Henrietta NY), X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing neodymium to reduce aftergl.
Sze, Daniel H.; Chou, Hung Liang; Fan, Xiaolin, Absorbent sheet of cellulosic fibers having an upper side and a lower side with connecting regions forming a network interconnecting hollow domed regions.
Sze, Daniel H.; Chou, Hung Liang; Fan, Xiaolin, Method of creping a cellulosic sheet using a multilayer creping belt having openings to make paper products, and paper products made using a multilayer creping belt having openings.
Super, Guy H.; Ruthven, Paul J.; McCullough, Stephen J.; Sze, Daniel H.; Wendt, Greg A.; Miller, Joseph H., Method of making a belt-creped, absorbent cellulosic sheet with a perforated belt.
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