WO2000034576A1 - Method and apparatus for making a throughdried tissue product without a throughdrying fabric - Google Patents
Method and apparatus for making a throughdried tissue product without a throughdrying fabric Download PDFInfo
- Publication number
- WO2000034576A1 WO2000034576A1 PCT/US1999/029131 US9929131W WO0034576A1 WO 2000034576 A1 WO2000034576 A1 WO 2000034576A1 US 9929131 W US9929131 W US 9929131W WO 0034576 A1 WO0034576 A1 WO 0034576A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- web
- throughdrying
- drum
- throughdrying drum
- tissue
- 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
- D21F11/006—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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/021—Construction of the cylinders
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/18—Drying webs by hot air
- D21F5/182—Drying webs by hot air through perforated cylinders
- D21F5/184—Surfaces thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/001—Wire-changing arrangements
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
- D21G3/04—Doctors for drying cylinders
Definitions
- the throughdrying process involves passing hot air through a dewatered tissue web while the web is supported by a throughdrying fabric. More specifically, the fabric-supported web is dried while it is maintained in contact with a rotating throughdrying drum, which supplies the hot drying air. Depending upon the particular process, the dried web can be subsequently creped or left uncreped.
- the throughdrying fabric can be eliminated from the tissue machine by properly designing the throughdryer. This not only eliminates the costs of purchasing throughdrying fabrics and the down time costs associated with fabric changes, but the thermal efficiency of the drying process can also be improved.
- the invention resides in a method of making a throughdried tissue sheet comprising:(a) forming a tissue web; (b) dewatering the tissue web; (c) transferring the dewatered web from a supporting fabric to the surface of a throughdrying drum having a plurality of holes through which hot air passes to dry the web; (d) drying the web while on the surface of the throughdrying drum; and (e) removing the dried web from the surface of the throughdrying drum. Transfer of the web onto the surface of the throughdrying drum can be assisted by a blow box which blows compressed air through the supporting fabric towards the surface of the throughdrying drum.
- the transfer can be further assisted by the presence of a vacuum box within the throughdrying drum at the point of transfer. Removal of the dried web from the surface of the throughdrying drum can be assisted by the presence of a blow box within the throughdrying drum which blows air outwardly toward the dried web at the point of removal.
- a doctor blade can be used to skim the dried web from the surface of the throughdrying drum. In some cases, if the strength of the web is adequate, the dried web can be simply peeled off.
- the invention resides in a method of making a throughdried tissue sheet comprising:(a) forming a tissue web; (b) dewatering the tissue web; (c) transferring the dewatered web to the surface of a throughdrying drum without being supported by a throughdrying fabric, said surface of the throughdrying drum having a plurality of circumferential ridges; (d) drying the web while on the surface of the throughdrying drum; and (e) removing the dried web from the surface of the throughdrying drum.
- the presence of the circumferential ridges impart significant bulk, cross-machine directional stretch and flexibility to the resulting dried web.
- the invention resides in a throughdrying apparatus for drying a web, said apparatus comprising a perforated throughdrying drum having a plurality of circumferential ridges, a hot air hood for supplying hot air to the surface of the throughdrying drum, a vacuum zone within the throughdrying drum for drawing hot air from the hot air hood inwardly through the surface of the throughdrying drum to dry the web, and means for removing the dried web from the surface of the throughdrying drum.
- the means for removing the dried web from the surface of the throughdrying drum can include a ribbed doctor blade which is positioned against the surface of the throughdrying drum which skims the web from the surface and/or a blow box within the throughdrying drum which utilizes pressurized air to blow the web off of the surface of the throughdrying drum.
- a dried "tissue” web is a low density sheet of papermaking fibers suitable for use as facial tissue, bath tissue or paper towels, as distinguished from other more dense grades of paper such as writing papers.
- Figure 1 is a schematic view of a method of this invention, illustrating the operation of the fabricless throughdrying drum.
- Figure 2 is a perspective view of a representative portion of the surface of a throughdrying drum in accordance with this invention, illustrating the circumferential ridges on the surface of the throughdryer and an intermeshing ribbed doctor blade.
- Figure 3 is a plan view of a representative portion of the throughdryer surface, illustrating the arrangement of the vacuum holes and the circumferential ridges.
- Figure 4 is a cross-sectional view of the surface of the throughdryer drum, further illustrating the spacial relationship of the circumferential ridges and the holes.
- a papermaking headbox 10 which deposits an aqueous suspension of papermaking fibers between an inner forming fabric 11 and an outer forming fabric 12 as the fabrics traverse an arcuate path defined by the surface of the forming roll 13.
- the newly-formed web 14 is retained by the inner forming fabric and passed over an optional capillary dewatering roll for the purpose of non-compressively removing free water from the web.
- a suitable capillary dewatering roll is described in U.S. Patent No. 5,701 ,682 entitled "Capillary Dewatering Method and Apparatus" issued December 30, 1997 to Chuang et al., which is hereby incorporated by reference.
- the web is transferred to the surface of the throughdrying drum 15 with the aid of an optional blow box 16 in combination with an internal vacuum box 17.
- Optional press rolls 18 and 19 selectively densify and strengthen portions of the web in order to decouple the resulting tissue's strength from the overall high bulk and low density.
- the inside of the throughdrying drum contains a vacuum zone 20 in order to draw hot air from the hot air hood 21 through the web and into the inside of the throughdrying drum.
- the web is removed from the surface of the drying drum, preferably either by skimming the web off of the surface using a ribbed doctor blade 22 and/or by blowing it off the surface using an optional blow box 23 and then wound into a parent roll 25 for further processing
- the throughdryer drum needs to be made of a metal that can withstand the high temperatures resulting from direct fire. Those skilled in the art of throughdryers will be able to select appropriate metal compositions for such service.
- the residual heat on the surface of the throughdrying drum resulting from the burner is not wasted and can be utilized for the subsequent conductive drying of the wet paper.
- the newly-formed web can be transferred to an intermediate transfer fabric, with or without a rush transfer, prior to being transferred to the throughdryer.
- it can be particularly advantageous to rush transfer the web from the forming fabric to the transfer fabric, wherein the transfer fabric is traveling at a speed of from about 5 to about 75 percent slower than the forming fabric.
- An example of such a rush transfer step is described in U.S. Patent No. 5,667,636 issued September 16, 1997 to Engel et al. entitled "Method For Making Smooth Uncreped Throughdried Sheets", which is hereby incorporated by reference.
- Figure 2 is a perspective view of a representative portion of the surface of the throughdrying drum, shown interacting with an optional mating ribbed doctor blade designed to skim off the throughdried web from the surface of the throughdryer.
- the surface of the throughdrying drum 15 is provided with a series of circumferential ridges 31 which provide a 3-dimensional contour and high bulk to the dried web.
- the ridges can be continuous or discontinuous in the circumferential direction (machine direction).
- In between the circumferential ridges are a plurality of holes 32 through which the hot drier air flows to dry the web.
- the ribbed doctor blade 22 also has its own series of ridges 33 which mesh with the ridges of the throughdryer surface to enable the ribbed doctor blade to scrape or skim the web off of the surface of the throughdryer.
- the leading edge of the doctor blade is tapered sufficiently to minimize any "creping" action in which the web would be buckled and the interfiber bonding substantially reduced.
- Figure 3 is a plan view of a representative portion of the surface of the throughdryer surface, more clearly illustrating the plurality of holes 32 in between the ridges 31.
- the open area of the holes can vary depending upon the specific process conditions, but in general can be from about 15 to about 40 percent, more specifically from about 20 to about 35 percent.
- Figure 4 is a cross-sectional view of the surface of the throughdryer drum taken along line 4-4 of Figure 3, more specifically showing the relative sizes of the holes and circumferential ridges.
- the height of the circumferential ridges is designated as "h”, which can be from about 0.7 to about 2 millimeters.
- the width or thickness of the circumferential ridges is designated as “t” , which can be from about 0.7 to about 1.5 millimeters.
- the spacing between the bases of the circumferential ridges is designated as "d”, which can be from about 1.5 to about 3 millimeters.
- the depth of the holes through the surface wall of the throughdryer is designated as "b”, which can be from about 2 to about 10 millimeters.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020017007086A KR20010080705A (en) | 1998-12-08 | 1999-12-08 | Method and Apparatus for Making a Throughdried Tissue Product Without a Throughdrying Fabric |
DE19983776T DE19983776T1 (en) | 1998-12-08 | 1999-12-08 | Method and device for producing a through-dried paper towel product without a through-drying textile product |
AU20468/00A AU2046800A (en) | 1998-12-08 | 1999-12-08 | Method and apparatus for making a throughdried tissue product without a throughdrying fabric |
BR9915748-9A BR9915748A (en) | 1998-12-08 | 1999-12-08 | Method and apparatus for manufacturing a dry fine fabric product directly without a direct drying screen |
SE0101998A SE524495C2 (en) | 1998-12-08 | 2001-06-07 | Method and apparatus for producing a blow-dried tissue product without a blow-drying fabric |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/207,457 US6209224B1 (en) | 1998-12-08 | 1998-12-08 | Method and apparatus for making a throughdried tissue product without a throughdrying fabric |
US09/207,457 | 1998-12-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000034576A1 true WO2000034576A1 (en) | 2000-06-15 |
Family
ID=22770624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/029131 WO2000034576A1 (en) | 1998-12-08 | 1999-12-08 | Method and apparatus for making a throughdried tissue product without a throughdrying fabric |
Country Status (14)
Country | Link |
---|---|
US (1) | US6209224B1 (en) |
JP (1) | JP2000170085A (en) |
KR (1) | KR20010080705A (en) |
AR (1) | AR021584A1 (en) |
AU (1) | AU2046800A (en) |
BR (1) | BR9915748A (en) |
CO (1) | CO5121089A1 (en) |
DE (1) | DE19983776T1 (en) |
FR (1) | FR2786795B1 (en) |
GB (1) | GB2344601B (en) |
PA (1) | PA8487001A1 (en) |
SE (1) | SE524495C2 (en) |
TW (1) | TW554119B (en) |
WO (1) | WO2000034576A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019224425A1 (en) * | 2018-05-24 | 2019-11-28 | Valmet Technologies Oy | Grooved and perforated turn roll of a fiber web machine |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10130038A1 (en) * | 2001-06-21 | 2003-01-02 | Voith Paper Patent Gmbh | Method and machine for producing a fibrous web |
KR100650980B1 (en) * | 2004-12-13 | 2006-11-30 | 주식회사 평강산업 | A hinge's torsion spring manufacturing method by introduction to metal injection molding technology and hinge device with thereof torsion spring |
CA3012766C (en) | 2016-02-08 | 2023-11-14 | Gpcp Ip Holdings Llc | Methods of making paper products using a molding roll |
ES2954273T3 (en) | 2016-02-08 | 2023-11-21 | Gpcp Ip Holdings Llc | Methods of manufacturing paper products using a molding roller |
EP3414394B1 (en) | 2016-02-08 | 2023-09-13 | GPCP IP Holdings LLC | Molding roll for making paper products |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2721146A1 (en) * | 1977-05-11 | 1978-11-16 | Schmidt Erwepa Maschf | Tissue paper making machine - has web forming and dried web winding stations arranged on same diametral side of drying cylinder |
DE19654198A1 (en) * | 1996-12-23 | 1998-06-25 | Voith Sulzer Papiermasch Gmbh | Machine for the production of a fibrous web |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR36294E (en) | 1928-10-29 | 1930-04-30 | Lignes Telegraph Telephon | Improvements to cable protection processes against corrosion |
NL41800C (en) | 1934-07-23 | |||
US3806406A (en) | 1971-12-20 | 1974-04-23 | Beloit Corp | Tissue former including a yankee drier having raised surface portions |
DE2212209C3 (en) | 1972-03-14 | 1980-05-29 | Escher Wyss Gmbh, 7980 Ravensburg | Dryer section |
US3821068A (en) | 1972-10-17 | 1974-06-28 | Scott Paper Co | Soft,absorbent,fibrous,sheet material formed by avoiding mechanical compression of the fiber furnish until the sheet is at least 80% dry |
DE2323574C3 (en) | 1973-05-10 | 1976-01-08 | J.M. Voith Gmbh, 7920 Heidenheim | Drying section for paper machines |
GB1519265A (en) | 1975-04-09 | 1978-07-26 | Valmet Oy | Method and apparatus for treatment of a web in order to adjust the moisture content thereof |
US4036684A (en) | 1975-08-04 | 1977-07-19 | Beloit Corporation | High bulk tissue forming and drying apparatus |
US4087319A (en) * | 1976-12-27 | 1978-05-02 | Beloit Corporation | Method of and means for sheet transfer to and embossing at a reeling station |
FI54627C (en) | 1977-04-04 | 1979-01-10 | Valmet Oy | FOERFARANDE OCH ANORDNING I TORKPARTIET I EN PAPPERSMASKIN |
US4102737A (en) | 1977-05-16 | 1978-07-25 | The Procter & Gamble Company | Process and apparatus for forming a paper web having improved bulk and absorptive capacity |
FI54629C (en) * | 1977-07-08 | 1979-01-10 | Nokia Oy Ab | FOERFARANDE I EN MED EN GENOMSTROEMNINGSTORK FOERSEDD TISSUEPAPPERSMASKIN |
FI54164C (en) * | 1977-07-08 | 1978-10-10 | Nokia Oy Ab | FOER REQUIREMENTS FOR ANIMAL READING AV EN TISSUEPAPPERSBANA FRAON PICK-UP-VAEVNADEN OCH FOER DESS OEVERFOERING TILL EN GENOMSTROEMNINGSTORK |
SE444589B (en) | 1980-10-23 | 1986-04-21 | Flaekt Ab | PROCEDURE FOR VENTILATION OF CYLINDER POCKETS IN A CYLINDER DRYER AND DEVICE FOR EXECUTION OF THE PROCEDURE |
DE3544541C1 (en) | 1985-12-17 | 1987-08-06 | Voith Gmbh J M | Device for transferring a paper or cardboard web from the press section to the dryer section of a paper machine or the like |
FI83680C (en) * | 1988-03-09 | 1991-08-12 | Valmet Paper Machinery Inc | FOERFARANDE OCH ANORDNING VID DRAGNINGEN AV BANAN I EN PAPPERSMASKIN SAMT CYLINDER FOER ANVAENDNING VID DRAGNINGEN AV BANAN. |
SE470134B (en) | 1992-04-23 | 1993-11-15 | Valmet Karlstad Ab | Ways of converting a conventional tissue machine to a TAD machine, as well as a suitable "C-wrap" type double wire former |
US5667636A (en) | 1993-03-24 | 1997-09-16 | Kimberly-Clark Worldwide, Inc. | Method for making smooth uncreped throughdried sheets |
US5515619A (en) * | 1993-08-06 | 1996-05-14 | J.M. Voith Gmbh | Flexibly mounted sealing strips of a vacuum roll for a web dryer |
US5861082A (en) * | 1993-12-20 | 1999-01-19 | The Procter & Gamble Company | Wet pressed paper web and method of making the same |
US5425852A (en) | 1993-12-27 | 1995-06-20 | James River Paper Company, Inc. | System for reducing blistering of a wet paper web on a yankee dryer |
CA2142805C (en) * | 1994-04-12 | 1999-06-01 | Greg Arthur Wendt | Method of making soft tissue products |
US5897745A (en) * | 1994-06-29 | 1999-04-27 | The Procter & Gamble Company | Method of wet pressing tissue paper |
US5598643A (en) | 1994-11-23 | 1997-02-04 | Kimberly-Clark Tissue Company | Capillary dewatering method and apparatus |
US5557863A (en) * | 1995-04-12 | 1996-09-24 | Valmet Corporation | Blow device for a dryer section of a paper machine |
US6033523A (en) * | 1997-03-31 | 2000-03-07 | Fort James Corporation | Method of making soft bulky single ply tissue |
CA2234305A1 (en) * | 1997-04-03 | 1998-10-03 | Fort James Corporation | High-intensity through-air-drying for conversion of conventional wet-press paper machines |
-
1998
- 1998-12-08 US US09/207,457 patent/US6209224B1/en not_active Expired - Fee Related
-
1999
- 1999-12-01 PA PA19998487001A patent/PA8487001A1/en unknown
- 1999-12-06 TW TW088121299A patent/TW554119B/en not_active IP Right Cessation
- 1999-12-07 AR ARP990106249A patent/AR021584A1/en unknown
- 1999-12-07 CO CO99076649A patent/CO5121089A1/en unknown
- 1999-12-07 FR FR9915381A patent/FR2786795B1/en not_active Expired - Fee Related
- 1999-12-08 AU AU20468/00A patent/AU2046800A/en not_active Abandoned
- 1999-12-08 JP JP11348592A patent/JP2000170085A/en active Pending
- 1999-12-08 WO PCT/US1999/029131 patent/WO2000034576A1/en not_active Application Discontinuation
- 1999-12-08 KR KR1020017007086A patent/KR20010080705A/en not_active Application Discontinuation
- 1999-12-08 BR BR9915748-9A patent/BR9915748A/en not_active Application Discontinuation
- 1999-12-08 DE DE19983776T patent/DE19983776T1/en not_active Withdrawn
- 1999-12-08 GB GB9929049A patent/GB2344601B/en not_active Expired - Fee Related
-
2001
- 2001-06-07 SE SE0101998A patent/SE524495C2/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2721146A1 (en) * | 1977-05-11 | 1978-11-16 | Schmidt Erwepa Maschf | Tissue paper making machine - has web forming and dried web winding stations arranged on same diametral side of drying cylinder |
DE19654198A1 (en) * | 1996-12-23 | 1998-06-25 | Voith Sulzer Papiermasch Gmbh | Machine for the production of a fibrous web |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019224425A1 (en) * | 2018-05-24 | 2019-11-28 | Valmet Technologies Oy | Grooved and perforated turn roll of a fiber web machine |
Also Published As
Publication number | Publication date |
---|---|
FR2786795B1 (en) | 2001-03-30 |
US6209224B1 (en) | 2001-04-03 |
SE0101998L (en) | 2001-07-27 |
JP2000170085A (en) | 2000-06-20 |
AR021584A1 (en) | 2002-07-24 |
PA8487001A1 (en) | 2000-09-29 |
BR9915748A (en) | 2001-10-23 |
KR20010080705A (en) | 2001-08-22 |
SE524495C2 (en) | 2004-08-17 |
GB9929049D0 (en) | 2000-02-02 |
SE0101998D0 (en) | 2001-06-07 |
AU2046800A (en) | 2000-06-26 |
FR2786795A1 (en) | 2000-06-09 |
DE19983776T1 (en) | 2001-11-22 |
TW554119B (en) | 2003-09-21 |
CO5121089A1 (en) | 2002-01-30 |
GB2344601A (en) | 2000-06-14 |
GB2344601B (en) | 2000-12-13 |
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