CA2300187A1 - Method of making a paper web having a high internal void volume of secondary fibers and a product made by the process - Google Patents

Method of making a paper web having a high internal void volume of secondary fibers and a product made by the process Download PDF

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Publication number
CA2300187A1
CA2300187A1 CA002300187A CA2300187A CA2300187A1 CA 2300187 A1 CA2300187 A1 CA 2300187A1 CA 002300187 A CA002300187 A CA 002300187A CA 2300187 A CA2300187 A CA 2300187A CA 2300187 A1 CA2300187 A1 CA 2300187A1
Authority
CA
Canada
Prior art keywords
web
furnish
paper product
absorbent paper
creping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002300187A
Other languages
French (fr)
Other versions
CA2300187C (en
Inventor
Steven L. Edwards
David W. White
John H. Dwiggins
Frank Harper
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GPCP IP Holdings LLC
Original Assignee
Fort James Corporation
Steven L. Edwards
David W. White
John H. Dwiggins
Frank Harper
Georgia-Pacific Consumer Products Lp
Gpcp Ip Holdings Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fort James Corporation, Steven L. Edwards, David W. White, John H. Dwiggins, Frank Harper, Georgia-Pacific Consumer Products Lp, Gpcp Ip Holdings Llc filed Critical Fort James Corporation
Priority to CA2676732A priority Critical patent/CA2676732C/en
Publication of CA2300187A1 publication Critical patent/CA2300187A1/en
Application granted granted Critical
Publication of CA2300187C publication Critical patent/CA2300187C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D21F11/145—Making cellulose wadding, filter or blotting paper including a through-drying process
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/006—Making patterned paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24446—Wrinkled, creased, crinkled or creped
    • Y10T428/24455—Paper

Abstract

The present invention is a method of making a near-premium quality paper product having good strength and absorbency characteristics and a product made by that method. The invention is also a method for retaining a high ash content within a paper web formed by conventional wet pressing. The present invention is also a method for retaining a high percentage of softening agent within a paper web that includes such an agent. Further, the present invention is a soft absorbent paper product having a high void volume. Finally, the invention is also a method for producing a soft, absorbent, and near premium paper product having a high void volume using an undulatory crepe blade having a multiplicity of serrulations in its rake surface which presents differentiated creping angles and/or rake angles as to the paper-being creped.

Claims (70)

1. A method for forming a soft absorbent paper product comprising:
supplying a furnish comprising fibers in an aqueous stream;
adding a charge modifier to said furnish wherein said charge modifier contacts said furnish for a time sufficient to reduce the charge in the furnish;
adding a debonder or strength-adjusting agent to said furnish, after said charge has been reduced;
adding a retention aid to said furnish after said debonder or wet strength adjusting agent has been in contact with said furnish for a time sufficient to allow distribution of said debonder or wet strength adjusting agent on said fibers;
supplying said furnish to a headbox, and wherein said furnish has a consistency of not greater than 0.9% as supplied to the headbox;
applying said furnish to a forming wire and forming a nascent web;
and drying said web to form a paper product.
2. The method according to claim 1, wherein said drying step comprises compactively dewatering said nascent web;
applying said web to a Yankee dryer and drying said web;
creping said web from said Yankee at a moisture content of less than about 50%.
3. The method according to claim 2, wherein the moisture content during creping is less than about 15%.
4. The method according to claim 2, wherein the moisture content during creping is less than about 6%.
5. The method according to claim 1, wherein the consistency of the furnish as supplied to the headbox is less than about 0.7%.
6. The method according to claim 5, wherein the consistency of the furnish as supplied to the headbox is less than about 0.5%.
7. The method according to claim 1, wherein the furnish contains greater than about 1% ash.
8. The method according to claim 1, wherein the furnish contains greater than about 2% ash.
9. The method according to claim 1, wherein the furnish contains only recycled fibers.
10. The method according to claim 1, wherein the charge modifier is added in an amount of from about 1 lb/ton to about 10 lbs/ton.
11. The method according to claim 10, wherein the charge modifier is added in an amount of from about 2 lbs/ton to about 6 lbs/ton.
12. The method according to claim 1, further comprising adding a softener.
13. The method according to claim 12, wherein the softener is added to the furnish prior to the addition of said retention aid.
14. The method according to claim 12, wherein the softener is sprayed onto the web after formation.
15. The method according to claim 1, wherein a debonder is added.
16. The method according to claim 15, wherein the debonder is added in an amount of from about 1 lb/ton to about 20 lbs/ton.
17. The method according to claim 15, wherein the debonder contains an imidazolinium compound.
18. The method according to claim 1, wherein a strength-adjusting agent is added.
19. The method according to claim 18, wherein the strength-adjusting agent is added in an amount of from about 4 lbs/ton to about 30 lbs/ton.
20. The method according to claim 1, wherein said drying is through-air-drying.
21. The method according to claim 1, wherein the furnish contains greater than about 4% ash.
22. The method of claim 2 wherein said web is creped using an undulatory crepe blade which produces said absorbent paper product, said web having a machine direction and a cross machine direction and said web having a Yankee side and an air side, comprising a biaxially undulatory cellulosic fibrous web characterized by a reticulum of intersecting undulations and crepe bars, said crepe bars extending transversely in the cross machine direction, said undulations defining:
interspersed ridges and furrows extending longitudinally in the machine direction on the air side of the sheet; along with interspersed crests and sulcations disposed on the Yankee side of the web, wherein the spatial frequency of said transversely extending crepe bars is from about 10 to about 150 crepe bars per inch, and the spatial frequency of said longitudinally extending ridges is from about 10 to 50 ridges per inch such that the total variation in the topography of the web is about 20%.
23. The method of claim 22 wherein creping of said web produces said absorbent paper product wherein the thickness of the portion of said tissue adjoining said longitudinally extending crests is at least about 5% greater than the thickness of the portions of said tissue adjoining said sulcations.
24. The method of claim 22 wherein creping of said web produces said absorbent paper product wherein the thickness of the portion of said web adjoining said crests is substantially greater than the thickness of the portions of said tissue adjoining said sulcations.
25. The method of claim 22 wherein creping of said web produces said absorbent paper product wherein the average density of the portion the tissue in said crests is less than the density of said tissue in said sulcations.
26. The method of claim 22 wherein creping of said web produces said absorbent paper product wherein the nascent web is subjected to overall compaction while the percent solids is less than fifty percent by weight.
27. The method of claim 22 wherein creping of said web produces said absorbent paper product wherein fibers in the tissue crests project acutely therefrom and the average density of the portion of the tissue adjacent said crests is less than the density of said tissue adjacent said sulcations.
28. A method for improving the retention of a softener or debonder in a web produced from a furnish containing contaminants selected from ash, ones, filler and mixtures thereof comprising:
adding to said furnish a charge-modifying agent capable of neutralizing the charge on said contaminants;
allowing the charge-modifying agent to contact the furnish for a time sufficient to neutralize charge on said contaminants;
adding to said furnish a softener or debonder;
adding to said furnish a retention aid;
forming a nascent web from said furnish; and drying said web.
29. A method of incorporating ash or filler into a soft absorbent web comprising;
providing a furnish containing ash or filler;
adding to said furnish a charge modifier capable of neutralizing the charge on said ash or filler;
allowing the charge modifier to contact the furnish for a time sufficient to neutralize charge on said ash or filler;
adding to said furnish a debonder or strength-adjusting agent;
adding to said furnish a retention aid;
forming a nascent web from said furnish; and drying said web.
30. A method for improving the efficiency of a strength-adjusting agent in a web produced from a furnish containing contaminants selected from ash, fines, filler and mixtures thereof comprising:
adding to the furnish a charge-modifying agent capable of reducing the charge on said contaminants;

allowing the charge-modifying agent to contact the furnish for a time sufficient to reduce the charge on said contaminants;
adding a strength-adjusting agent to the furnish;
adding a retention aid to the furnish;
forming a nascent web from the furnish; and drying the web.
31. A soft absorbent paper product comprising a web formed by conventional wet pressing of a cellulosic web, adhering said web to a Yankee and creping said web from said Yankee comprising:
fibers including secondary fibers having at least 1 % ash;
and wherein said web has a void volume of:
void volume ~ 8.4 - (0.2 x Basis Weight).
32. A soft absorbent paper product according to claim 31, wherein the paper product has a geometric mean breaking length of less than or equal to 11,000 ft. and a volume void greater than 5Ø
33. A soft absorbent paper product according to claim 32, wherein a debonder is present in an amount of from about 0.03% to about 1%.
34. A soft absorbent paper product according to claim 31, wherein the paper product has a volume void greater than 6.5
35. A soft absorbent paper product according to claim 34, wherein a debonder is present in an amount of from about 0.03% to about 1%.
36. A soft absorbent paper product according to claim 31, wherein said product is a tissue.
37. A soft absorbent paper product according to claim 36, wherein said product has a basis weight of from about 9 to about 25 Ibs/ream, and an ash content between about 1% and about 15%.
38. A soft absorbent paper product according to claim 31, wherein said product is a towel.
39. A soft absorbent paper product according to claim 38, wherein said product has a basis weight of from about 11 to about 40 Ibs/ream and an ash content of from about 1% to about 30%.
40. A soft absorbent paper product according to claim 31, wherein said product is a napkin.
41. A soft absorbent paper product according to claim 40, wherein said product has a basis weight of from about 11 to about 30, and an ash content of from about 1% to about 20%.
42. A soft absorbent paper product according to claim 31 wherein said web is creped using an undulatory crepe blade which produces said absorbent paper product comprising a biaxially undulatory cellulosic fibrous web characterized by a reticulum of intersecting undulations and crepe bars, said crepe bars extending transversely in the cross machine direction, said undulations defining: interspersed ridges and furrows extending longitudinally in the machine direction on the air side of the sheet; along with interspersed crests and sulcations disposed on the Yankee side of the web, wherein the spatial frequency of said transversely extending crepe bars is from about 10 to about 150 crepe bars per inch, and the spatial frequency of said longitudinally extending ridges is from about 10 to 50 ridges per inch.
43. A soft absorbent paper product according to claim 42 wherein creping of said web produces said absorbent paper product wherein the thickness of the portion of said tissue adjoining said longitudinally extending crests is at least about 5% greater than the thickness of the portions of said tissue adjoining said sulcations.
44. A soft absorbent paper product according to claim 42 wherein creping of said web produces said absorbent paper product wherein the thickness of the portion of said web adjoining said crests is substantially greater than the thickness of the portions of said tissue adjoining said sulcations.
45. A soft absorbent paper product according to claim 42 wherein creping of said web produces said absorbent paper product wherein the average density of the portion the tissue in said crests is less than the density of said tissue in said sulcations.
46. A soft absorbent paper product according to claim 42 wherein creping of said web produces said absorbent paper product wherein the nascent web is subjected to overall compaction while the percent solids is less than fifty percent by weight.
47. A soft absorbent paper product according to claim 42 wherein creping of said web produces said absorbent paper product wherein fibers in the tissue crests project acutely therefrom and the average density of the portion of the tissue adjacent said crests is less than the density of said tissue adjacent said sulcations.
48. A soft absorbent paper product comprising a web formed by through air drying comprising:
fibers including secondary fibers having at least 1% ash;
and wherein said web has a void volume of:
void volume ~ 8.4 - (0.2 x Basis Weight).
49. The soft absorbent paper product according to claim 9, wherein the furnish used to make the product has a consistency as it is supplied to the headbox of less than 0.9%.
50. The method according to claim 28, wherein the charge on the contaminants has been reduced by at least 70% of the original value.
51. The method of claim 22, wherein the tensile strength in the resulting web produced by said undulatory creping has been reduced by at least 10% of the lowest strength web produced by the method of claim 2.
52. The method of claim 22, wherein the tensile strength in the resulting web produced by said undulatory creping has been reduced by at least 15% of the lowest strength web produced by the method of claim 2.
53. The product of claim 42, wherein the tensile strength in the resulting web produced by said undulatory creping has been reduced by at least 10% of the lowest strength web produced by the method of claim 2.
54. The product of claim 42, wherein the tensile strength in the resulting web produced by said undulatory creping has been reduced by at least 15% of the lowest strength web produced by the method of claim 2.
55. The method of claim 22, wherein the web is embossed between a hard embossing roll and a smooth, softer embossing roll, and wherein the total variation in topography due to the undulatory crepe blade is reduced by about 25%.
56. The method of claim 22, wherein the web is embossed between mated emboss rolls and wherein the total variation in topography due to the undulatory crepe blade is reduced by about 35%.
57. The method of claim 22, wherein the web is embossed between a hard embossing roll and a smooth, softer embossing roll, and wherein the total variation in topography due to the undulatory crepe blade is reduced by about 50%.
58. The method of claim 22, wherein the web is embossed between mated emboss rolls and wherein the total variation in topography due to the undulatory crepe blade is reduced by about 59%.
59. The product of claim 42, wherein the web is embossed between a hard embossing roll and a smooth, softer embossing roll, and wherein the total variation in topography due to the undulatory crepe blade is reduced by about 25%.
60. The product of claim 42, wherein the web is embossed between mated emboss rolls and wherein the total variation in topography due to the undulatory crepe blade is reduced by about 35%.
61. The product of claim 42, wherein the web is embossed between a hard embossing roll and a smooth, softer embossing roll, and wherein the total variation in topography due to the undulatory crepe blade is reduced by about 50%.
62. The product of claim 42, wherein the web is embossed between mated emboss rolls and wherein the total variation in topography due to the undulatory crepe blade is reduced by about 59%
63. The method of claim 22, wherein the after-calendering caliper in the resulting web produced by said undulatory creping has been increased by at least about 25% over the caliper of the web as produced by the method of claim 2.
64. The method of claim 22, wherein the after-calendering caliper in the resulting web produced by said undulatory creping has been increased by at least about 33% over the caliper of the web as produced by the method of claim 2.
65. The method of claim 42, wherein the after-calendering caliper in the resulting web produced by said undulatory creping has been increased by at least about 25% over the caliper of the web as produced by the method of claim 2.
66. The product of claim 42, wherein the after-calendering caliper in the resulting web produced by said undulatory creping has been increased by at least about 33% over the caliper of the web as produced by the method of claim 2.
67. The product of claim 22, wherein the cross-directional stretch in the resulting web produced by said undulatory creping has been increased by at least about 34% over the cross-directional stretch of the web as produced by the method of claim 2.
68. The method of claim 22, wherein the cross-directional stretch in the resulting web produced by said undulatory creping has been increased by at least about 38% over the cross-directional stretch of the web as produced by the method of claim 2.
69. The product of claim 42, wherein the cross-directional stretch in the resulting web produced by said undulatory creping has been increased by at least about 34% over the cross-directional stretch of the web as produced by the method of claim 2.
70. The product of claim 42, wherein the cross-directional stretch in the resulting web produced by said undulatory creping has been increased by at least about 38% over the cross-directional stretch of the web as produced by the method of claim 2.
CA002300187A 1998-06-12 1999-06-11 Method of making a paper web having a high internal void volume of secondary fibers and a product made by the process Expired - Lifetime CA2300187C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2676732A CA2676732C (en) 1998-06-12 1999-06-11 Method of making a paper web having a high internal void volume of secondary fibers and a product made by the process

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US9715998A 1998-06-12 1998-06-12
US09/097,159 1998-06-12
PCT/US1999/013285 WO1999064673A1 (en) 1998-06-12 1999-06-11 Method of making a paper web having a high internal void volume of secondary fibers and a product made by the process

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CA2300187A1 true CA2300187A1 (en) 1999-12-16
CA2300187C CA2300187C (en) 2009-11-17

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US (4) US6511579B1 (en)
EP (2) EP1398413A2 (en)
CA (2) CA2676732C (en)
TR (1) TR200000382T1 (en)
WO (1) WO1999064673A1 (en)

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US6824648B2 (en) 2004-11-30
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