WO2002048452A2 - Method for calendering an uncreped throughdried tissue sheet - Google Patents
Method for calendering an uncreped throughdried tissue sheet Download PDFInfo
- Publication number
- WO2002048452A2 WO2002048452A2 PCT/US2001/047599 US0147599W WO0248452A2 WO 2002048452 A2 WO2002048452 A2 WO 2002048452A2 US 0147599 W US0147599 W US 0147599W WO 0248452 A2 WO0248452 A2 WO 0248452A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- roll
- fabric
- papermaking fabric
- calendering
- Prior art date
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
- D21F11/14—Making cellulose wadding, filter or blotting paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
Definitions
- Calendering is a standard process for converting or processing paper that is typically done between the Yankee dryer and the reel section of a conventional tissue machine.
- the area between the Yankee dryer and the reel section of the tissue machine has an open draw where the dried tissue sheet is unsupported.
- a calender section can be inserted into this open area to calender the sheet prior to winding the sheet onto the reel.
- an uncreped tissue sheet produced on a tissue machine having a belted reel section, can be modified (calendered, embossed, pressed, crimped, printed, chemically treated or otherwise acted upon in a nip between two rolls) while remaining completely supported by either fabrics or rolls.
- the supporting fabric or fabrics which move the sheet from the throughdryer to the reel section can be the throughdrying fabric or one or more dry end transfer fabrics.
- the invention resides in a method for modifying an uncreped throughdried tissue sheet supported by a papermaking fabric, said method comprising removing the dried tissue sheet from the papermaking fabric, modifying the tissue sheet, particularly compressively modifying the tissue sheet in a nip between two rolls, and transferring the modified or compressively modified sheet to a papermaking fabric which carries the sheet to a reel section for winding the sheet into a parent roll, wherein the sheet is supported at all times by a roll surface or a supporting fabric.
- any compressive modification step can be carried out between any combination of steel and rubber rolls, such as steel/steel, steel/rubber or rubber/rubber. The rolls can be smooth or engraved, matched or unmatched.
- the invention resides in a method for compressively modifying an uncreped throughdried tissue sheet supported by a papermaking fabric, said method comprising removing the dried tissue sheet from the papermaking fabric via a vacuum transfer roll, contacting the sheet with the surface of a rubber-covered backing roll, passing the sheet through a nip between the rubber-covered backing roll and a steel roll, and transferring the compressively modified sheet to a papermaking fabric which carries the sheet to the reel section for winding the sheet into a parent roll.
- the invention resides in a method for compressively modifying an uncreped throughdried tissue sheet supported by a papermaking fabric, said method comprising removing the dried tissue sheet from the papermaking fabric, compressively modifying the tissue sheet, and transferring the compressively modified sheet to a papermaking fabric which carries the sheet to the reel section for winding the sheet into a parent roll, wherein, prior to removal of the dried tissue sheet from the papermaking fabric, the dried tissue sheet is sandwiched between the papermaking fabric and a second papermaking fabric, said method further comprising separating the tissue sheet and the second papermaking fabric from the papermaking fabric via a vacuum transfer roll such that the second papermaking fabric is in direct contact with the surface of the vacuum transfer roll, transferring the second papermaking fabric and the tissue sheet to a steel roll such that the tissue sheet is in direct contact with the surface of the steel roll, separating the second papermaking fabric from the tissue sheet, passing the tissue sheet through a nip between the steel roll and a rubber-covered backing roll to compressively modify the sheet, and transferring
- the invention resides in a method for compressively modifying an uncreped throughdried tissue sheet supported by a papermaking fabric, said method comprising transferring the dried sheet from the papermaking fabric to a steel roll via a vacuum transfer roll, passing the sheet through a nip between the steel roll and a rubber- covered backing roll, and transferring the compressively modified sheet, via a second vacuum transfer roll, to a papermaking fabric that carries the sheet to the reel.
- the invention resides in a method for compressively modifying an uncreped throughdried tissue sheet supported by a papermaking fabric comprising removing the dried tissue sheet from the papermaking fabric, passing the tissue sheet over a support surface, passing the tissue sheet through a nip between a steel roll and a rubber-coated backing roll, passing the resulting compressively modified sheet over a second support surface, and joining the sheet with a papermaking fabric which carries the sheet to the reel section.
- the invention resides in a method for compressively modifying an uncreped throughdried tissue sheet supported by a papermaking fabric comprising contacting the throughdried tissue sheet, while still in contact with the papermaking fabric, with a first roll, separating the tissue sheet from the papermaking fabric, passing the sheet through a nip formed between the first roll and a second roll while travelling in a direction opposite the machine direction of travel, transferring the resulting compressively modified sheet to the surface of the second roll and reversing the direction of travel of the sheet while in contact with the second roll, separating the sheet from the second roll and joining the compressively modified sheet with a papermaking fabric that carries the compressively modified sheet to the reel section.
- the various sheet modification rolls can be calendering rolls, embossing rolls or printing rolls and the like in order to modify the tissue sheet in any desired manner.
- Calendering rolls can be used to control the caliper of the sheet and improve softness.
- Embossing rolls can be used to impart patterns to the sheet.
- Printing rolls, such as gravure rolls, can be used to print inks or other chemicals, such as softening chemicals, onto the surface of the sheet. Calendering rolls are particularly suitable for compressively modifying the sheet in accordance with this invention.
- tissue sheet includes paper webs having a basis weight and bulk appropriate for use as facial tissue, bath tissue, paper towels, dinner napkins and the like.
- Figure 1 is a schematic diagram of an uncreped throughdried tissue machine as disclosed in Figure 2 of U.S. Patent No. 5,593,545 issued January 14, 1997 to Rugowski et al., previously incorporated herein by reference, to which this invention is applicable.
- Figure 2 is a schematic diagram of one embodiment of this invention, in which the dried tissue sheet is temporarily separated from the supporting fabric using a vacuum transfer roll and is thereafter calendered by passing the sheet through a nip between a rubber-covered backing roll and a steel calendering roll before being returned to the supporting fabric.
- Figure 3 is a schematic diagram of another embodiment of this invention, in which the calendering step is carried out while the sheet is positioned against a supporting fabric.
- Figure 4 is similar to Figure 3, but where the sheet is calendered after being removed from the one supporting fabric and thereafter transferred to another supporting fabric.
- Figure 5 is a schematic diagram of another embodiment of this invention, in which the rubber-covered backing roll is mounted above the steel calendering roll and a second vacuum transfer roll is used to transfer the calendered sheet back to the same supporting fabric.
- Figure 6 is a schematic diagram of another embodiment of this invention, in which the supporting fabric is diverted around the calendering rolls while the sheet is directed through the calendering nip using one or more air foils to maintain substantially continuous support of the sheet.
- Figure 7 is a schematic diagram of another embodiment of this invention, in which the supporting fabric remains in contact with the sheet while the sheet contacts the first calendering roll prior to the calendering nip and is rejoined with the sheet after the sheet passes through the calendering nip and is carried around the second calendering roll.
- FIG. 1 illustrates a schematic flow diagram of a representative throughdrying process for making uncreped throughdried tissues to which this invention can be applied.
- the headbox 1 which deposits an aqueous suspension of papermaking fibers onto inner forming fabric 3 as it traverses the forming roll 4.
- Outer forming fabric 5 serves to contain the web while it passes over the forming roll and sheds some of the water.
- the wet web 6 is then transferred from the inner forming fabric to a wet end transfer fabric 8 with the aid of a vacuum transfer shoe 9. This transfer is preferably carried out with the transfer fabric travelling at a slower speed than the forming fabric (rush transfer) to impart stretch into the final tissue sheet.
- the wet web is then transferred to the throughdrying fabric 11 with the assistance of a vacuum transfer roll 12.
- the throughdrying fabric carries the web over the throughdryer 13, blows hot air through the web to dry it while preserving bulk.
- As the dried tissue sheet 15 leaves the throughdryer fabric it is transferred to a first dry end transfer fabric 16 with the aid of a vacuum transfer roll 17.
- Suitable fabrics for use as the first dry end transfer fabric 16 include, without limitation, a wide variety of fabrics such as Asten 934, Asten 939, Albany 59M, Albany Duotex DD207, Lindsay 543 and the like.
- tissue sheet is then compressed between the first dry end transfer fabric and a second dry end transfer fabric 18, which has a greater air permeability than that of the first dry end transfer fabric and which wraps around the reel drum 22.
- Suitable second dry end transfer fabrics include, without limitation, Asten 960 (air permeability of about 300-400), Appleton Mills style Q53F (air permeability of about 400), Appleton Mills style Q53KY (air permeability of about 200), Albany Duotex A81 and Appleton Mills style HC200 (air permeability of about 200). Because of the air flow through the lower fabric caused by roll 31 , the sheet transfers to the second dry end transfer fabric 18.
- tissue sheet is then carried to the winding nip formed between the reel drum and the reel 23 and wound into a roll 25.
- FIG. 2 illustrates one embodiment of this invention.
- the front end of the overall papermaking process can be as illustrated in Figure 1.
- the use of the same reference numbers in the various figures is intended to represent the same features.
- Shown in Figure 2 is the dried tissue sheet 15, supported by the second dry end transfer fabric 18, being transferred to a rubber-coated embossing roll 31 via a vacuum transfer roll 32.
- the tissue sheet then passes through the calendering nip formed between the rubber-coated calendering roll and a steel calendering roll 33, before being placed in contact again with the second dry end transfer fabric with the aid of a vacuum box 39.
- the steel calender roll 33 and the rubber-covered calender roll 31 can be interchanged to impart different surface properties to the sheet.
- the second dry end transfer fabric carries the calendered tissue sheet 35 to the reel, where it is wound into a parent roll for subsequent converting operations.
- Optional air showers 36a, 36b and 36c are also shown, which aid in threading the tissue sheet into the calender nip during startup.
- the steel calendering roll 33 can be loaded to apply the desired pressure to the calendering nip, or the steel roll can be positioned to provide a fixed-gap nip.
- the papermaking fabric carrying the sheet to the calendering station and the papermaking fabric carrying the calendered sheet to the reel station is the same fabric, preferably the second dry end transfer fabric or the throughdrying fabric, in order to minimize the number of fabric runs on the machine.
- the entire time the sheet is in the calendering station from the time the sheet is removed from the papermaking fabric until the time the sheet is brought into contact with the papermaking fabric that carries the sheet to the reel section, the sheet is substantially in contact with a roll surface, fully supporting the sheet and thereby minimizing the chances for a sheet break or deleterious effects on important sheet properties such as machine-direction tensile strength.
- Figure 3 illustrates an alternative embodiment, where the dried tissue sheet 15 enters the calendering station while sandwiched between two papermaking fabrics, namely the first dry end transfer fabric 16 and the second dry end transfer fabric 18.
- the sheet and the first dry end transfer fabric 16 are separated from the second dry end transfer fabric 18 utilizing a vacuum transfer roll 32.
- the sheet and the first dry end transfer fabric transfer to the steel calender roll 33 with the sheet having direct contact with the steel roll.
- the first dry end transfer fabric then separates from the sheet and returns toward the dryer section as it passes around the return roll 36. In the meantime, the sheet passes through the calendering nip formed between the steel roll and the rubber-covered calender roll 31.
- FIG. 4 illustrates an alternative embodiment in which the dried tissue sheet 15 enters the calendering station while sandwiched between two papermaking fabrics, namely the first dry end transfer fabric 16 and the throughdrying fabric 11. As shown, the sheet and the first dry end transfer fabric 16 are separated from the throughdrying fabric 11 utilizing a vacuum transfer roll 32. The sheet and the first dry end transfer fabric transfer to the steel calender roll 33 with the sheet having direct contact with the steel roll. The first dry end transfer fabric then separates from the sheet and returns toward the dryer section as it passes around the return roll 36.
- the sheet passes through the calendering nip formed between the steel roll and the rubber-covered calender roll 31. Thereafter, the calendered sheet 35 is brought into contact with the second dry end transfer fabric 18 with the aid of a vacuum box 39 and carried to the reel section as illustrated above.
- Figure 5 illustrates another embodiment in which the dried sheet is transferred from a papermaking fabric, such as the second dry end transfer fabric or the throughdrying fabric, to a steel calendering roll 33 via a vacuum transfer roll 32.
- the dried sheet passes through the calendering nip between the steel calendering roll and a vertically-oriented rubber-covered calendering roll 31.
- the calendered sheet 35 is transferred to a papermaking fabric, such as the second wet end transfer fabric, using a second vacuum transfer roll 38 and/or vacuum box 39 and carried to the reel section as illustrated above.
- Air showers 36a, 36b and 36c assist in the various transfers.
- Figure 6 illustrates another embodiment in which the dried sheet is separated from the second dry end transfer fabric and passed over a first support surface 41.
- the support surface can be any surface that minimizes or reduces sheet flutter, including such structures as support boxes or air foils.
- the sheet is passed through a calendering nip between first and second calendering rolls, one of which is steel and the other being rubber-covered.
- the calendered sheet thereafter passes over a second support surface 42 and is transferred to a papermaking fabric, such as the second dry end transfer fabric as shown, and thereafter carried to the reel section.
- the second dry end transfer fabric by-passes the calendering section using multiple fabric carrying rolls 44a, 44b, 44c and 44d.
- Figure 7 illustrates another embodiment of this invention wherein the dried tissue web, while supported by the second dry end transfer fabric 18 or throughdrying fabric and traveling in the machine direction (indicated by the arrow labeled "MD"), passes over roll 46 and is carried around a first calendering roll 47, which can either be steel or rubber- covered. While in contact with the calendering roll 47, the sheet separates from the papermaking fabric and enters the calendering nip between the first calendering roll and the second calendering roll 48 while the sheet is traveling in a direction which is opposite the machine direction.
- the second calendering roll can be either steel or rubber-covered.
- the calendered sheet 35 then reverses directions around the second calendering roll 48 and is placed in contact again with the second dry end transfer fabric again as the fabric passes over a second tension roll 49.
- the fabric then carries the calendered sheet to the reel section as described above. Web management is enhanced with optional air showers 36a, 36b, 36c and 36d as well as vacuum roll 50 and vacuum box 39.
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Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU3660102A AU3660102A (en) | 2000-12-14 | 2001-12-03 | Method for calendering an uncreped throughdried tissue sheet |
MXPA03004568A MXPA03004568A (en) | 2000-12-14 | 2001-12-03 | Method for calendering an uncreped throughdried tissue sheet. |
BR0115723-0A BR0115723A (en) | 2000-12-14 | 2001-12-03 | Method for modifying a directly dry, unruffled sheet of toilet paper supported by a paper-making tissue |
EP01986135A EP1341963B1 (en) | 2000-12-14 | 2001-12-03 | Method for modifying an uncreped throughdried tissue sheet |
DE60109197T DE60109197T2 (en) | 2000-12-14 | 2001-12-03 | METHOD FOR MODIFYING AN UNCRAFTED, BLOW-DRIED TISSUE RAIL |
AU2002236601A AU2002236601B2 (en) | 2000-12-14 | 2001-12-03 | Method for calendering an uncreped throughdried tissue sheet |
KR10-2003-7007914A KR20030064823A (en) | 2000-12-14 | 2001-12-03 | Method for Calendering an Uncreped Throughdried Tissue Sheet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/736,925 | 2000-12-14 | ||
US09/736,925 US6716308B2 (en) | 2000-12-14 | 2000-12-14 | Method for calendering an uncreped throughdried tissue sheet |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002048452A2 true WO2002048452A2 (en) | 2002-06-20 |
WO2002048452A3 WO2002048452A3 (en) | 2002-08-29 |
Family
ID=24961897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/047599 WO2002048452A2 (en) | 2000-12-14 | 2001-12-03 | Method for calendering an uncreped throughdried tissue sheet |
Country Status (8)
Country | Link |
---|---|
US (1) | US6716308B2 (en) |
EP (1) | EP1341963B1 (en) |
KR (1) | KR20030064823A (en) |
AU (2) | AU2002236601B2 (en) |
BR (1) | BR0115723A (en) |
DE (1) | DE60109197T2 (en) |
MX (1) | MXPA03004568A (en) |
WO (1) | WO2002048452A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2022892A2 (en) * | 2007-07-21 | 2009-02-11 | Voith Patent GmbH | Construction group with calender and drying device |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7597922B2 (en) * | 1999-05-18 | 2009-10-06 | Nestec S.A. | System for dispensing a liquid beverage concentrate |
US6669818B2 (en) * | 2000-06-28 | 2003-12-30 | Metso Paper Karlstad Ab | Shortened layout from dryer to reel in tissue machine |
FI119822B (en) * | 2000-11-21 | 2009-03-31 | Metso Paper Inc | Method and apparatus for introducing a web into a paper or board machine finishing device |
US6797115B2 (en) * | 2002-03-29 | 2004-09-28 | Metso Paper Karlstad Ab | Method and apparatus for making a creped tissue with improved tactile qualities while improving handling of the web |
US6743334B2 (en) * | 2002-06-11 | 2004-06-01 | Metso Paper Karlstad Aktiebolag (Ab) | Method and apparatus for making a tissue paper with improved tactile qualities while improving the reel-up process for a high bulk web |
TWI268972B (en) * | 2002-11-27 | 2006-12-21 | Kimberly Clark Co | Rolled tissue products having high bulk, softness, and firmness |
US6887348B2 (en) * | 2002-11-27 | 2005-05-03 | Kimberly-Clark Worldwide, Inc. | Rolled single ply tissue product having high bulk, softness, and firmness |
US7524399B2 (en) * | 2004-12-22 | 2009-04-28 | Kimberly-Clark Worldwide, Inc. | Multiple ply tissue products having enhanced interply liquid capacity |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5048589A (en) * | 1988-05-18 | 1991-09-17 | Kimberly-Clark Corporation | Non-creped hand or wiper towel |
US5593545A (en) * | 1995-02-06 | 1997-01-14 | Kimberly-Clark Corporation | Method for making uncreped throughdried tissue products without an open draw |
US5759346A (en) * | 1996-09-27 | 1998-06-02 | The Procter & Gamble Company | Process for making smooth uncreped tissue paper containing fine particulate fillers |
US5888347A (en) * | 1993-03-24 | 1999-03-30 | Kimberly-Clark World Wide, Inc. | Method for making smooth uncreped throughdried sheets |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4087319A (en) * | 1976-12-27 | 1978-05-02 | Beloit Corporation | Method of and means for sheet transfer to and embossing at a reeling station |
CA2134594A1 (en) * | 1994-04-12 | 1995-10-13 | Kimberly-Clark Worldwide, Inc. | Method for making soft tissue products |
US5601871A (en) * | 1995-02-06 | 1997-02-11 | Krzysik; Duane G. | Soft treated uncreped throughdried tissue |
US5591309A (en) * | 1995-02-06 | 1997-01-07 | Kimberly-Clark Corporation | Papermaking machine for making uncreped throughdried tissue sheets |
-
2000
- 2000-12-14 US US09/736,925 patent/US6716308B2/en not_active Expired - Fee Related
-
2001
- 2001-12-03 MX MXPA03004568A patent/MXPA03004568A/en active IP Right Grant
- 2001-12-03 AU AU2002236601A patent/AU2002236601B2/en not_active Ceased
- 2001-12-03 AU AU3660102A patent/AU3660102A/en active Pending
- 2001-12-03 EP EP01986135A patent/EP1341963B1/en not_active Expired - Lifetime
- 2001-12-03 KR KR10-2003-7007914A patent/KR20030064823A/en not_active Application Discontinuation
- 2001-12-03 BR BR0115723-0A patent/BR0115723A/en not_active IP Right Cessation
- 2001-12-03 WO PCT/US2001/047599 patent/WO2002048452A2/en active IP Right Grant
- 2001-12-03 DE DE60109197T patent/DE60109197T2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5048589A (en) * | 1988-05-18 | 1991-09-17 | Kimberly-Clark Corporation | Non-creped hand or wiper towel |
US5888347A (en) * | 1993-03-24 | 1999-03-30 | Kimberly-Clark World Wide, Inc. | Method for making smooth uncreped throughdried sheets |
US5593545A (en) * | 1995-02-06 | 1997-01-14 | Kimberly-Clark Corporation | Method for making uncreped throughdried tissue products without an open draw |
US5759346A (en) * | 1996-09-27 | 1998-06-02 | The Procter & Gamble Company | Process for making smooth uncreped tissue paper containing fine particulate fillers |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2022892A2 (en) * | 2007-07-21 | 2009-02-11 | Voith Patent GmbH | Construction group with calender and drying device |
EP2022892A3 (en) * | 2007-07-21 | 2013-10-23 | Voith Patent GmbH | Construction group with calender and drying device |
Also Published As
Publication number | Publication date |
---|---|
WO2002048452A3 (en) | 2002-08-29 |
EP1341963A2 (en) | 2003-09-10 |
AU3660102A (en) | 2002-06-24 |
DE60109197T2 (en) | 2005-12-29 |
AU2002236601B2 (en) | 2006-02-02 |
US20020074684A1 (en) | 2002-06-20 |
BR0115723A (en) | 2004-07-06 |
MXPA03004568A (en) | 2003-09-10 |
US6716308B2 (en) | 2004-04-06 |
KR20030064823A (en) | 2003-08-02 |
DE60109197D1 (en) | 2005-04-07 |
EP1341963B1 (en) | 2005-03-02 |
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