US20010007279A1 - Method to reduce the adhesion of a damp fibrous material web to a rotating roll - Google Patents

Method to reduce the adhesion of a damp fibrous material web to a rotating roll Download PDF

Info

Publication number
US20010007279A1
US20010007279A1 US09/153,344 US15334498A US2001007279A1 US 20010007279 A1 US20010007279 A1 US 20010007279A1 US 15334498 A US15334498 A US 15334498A US 2001007279 A1 US2001007279 A1 US 2001007279A1
Authority
US
United States
Prior art keywords
fibrous material
material web
rotating roll
accordance
approximately
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
US09/153,344
Other versions
US6436239B2 (en
Inventor
Dr. Martin Kusterman
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.)
Voith Sulzer Papiermaschinen GmbH
Original Assignee
Voith Sulzer Papiermaschinen GmbH
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 Voith Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Assigned to VOITH SULZER PAPIERMASCHINEN GMBH reassignment VOITH SULZER PAPIERMASCHINEN GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUSTERMANN, DR. MARTIN
Publication of US20010007279A1 publication Critical patent/US20010007279A1/en
Application granted granted Critical
Publication of US6436239B2 publication Critical patent/US6436239B2/en
Adjusted expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0272—Wet presses in combination with suction or blowing devices

Definitions

  • the present invention provides a method for reducing adhesion of the fibrous material web to a rotating roll.
  • a steam cushion is produced between the roll and the fibrous material web.
  • the steam cushion can be produced, e.g., by heating the roll to a very high temperature that is higher than necessary for the processing of the web.
  • the temperature of the surface of the roll can be heated to a temperature at produces steam from the damp material web, e.g., temperature values greater than approximately 120° C.
  • the temperature of the fibrous material web being guided to the rotating roll is less than approximately 70°C. and/or the dry content of the fibrous material web being guided to the rotating roll is less than approximately 60%.
  • the rotating roll can be located within a press section for draining the fibrous material web.
  • the rotating roll can also be located within a dryer section for drying the fibrous material web.
  • roll 4 is heated to as high a temperature as possible, e.g., over approximately 120° C. In this manner, evaporation of a part of the water in fibrous material web 1 occurs to form a steam cushion between fibrous material web 1 and roll 4 .
  • Various different heating systems may be utilized, e.g., electric systems or heated oil based systems, for heating roll 4 .
  • hot steam may be blown into an inlet side of the nip between roll 4 and fibrous material web 1 via a steam blow box 3 . In this manner, the steam cushion may be enlarged.
  • the process can be advantageously practiced where the temperature of fibrous material web 1 is under approximately 70°C. and/or the dry content of fibrous material web 1 is under approximately 60%, the most advantageous areas within the dryer section of the web producing mache for practicing the method of the present invention is in an initial area of the dryer section or in all initial area of an end drying section, e.g., if a strong rewetting occurs in a size press or the like.

Landscapes

  • Paper (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

Method to reduce adhesion of a damp fibrous material web, e.g., a paper or material web, to a rotating roll. The method includes producing a steam cushion between the rotating roll and the fibrous material web.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • The present application claims priority under 35 U.S.C. §119 of German Patent Application No. 197 41 517.2, filed on Sep. 20, 1997, the disclosure of which is expressly incorporated by reference herein in its entirety. [0001]
    • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0002]
  • The present invention relates to a method to reduce adhesion of a damp web, e.g., paper, textile, or other fibrous material web, to a rotating roll. [0003]
  • 2. Discussion of Background Information [0004]
  • Due to the ever-increasing speeds of machines for manufacturing and/or processing fibrous material webs, reducing adhesion of the damp fibrous material web to a smooth surface of rotating rolls is taking an increasing significance. The forces necessary to remove the fibrous material web from the roll increasingly effect the fibrous material web and can even result in a web break. [0005]
    • SUMMARY OF THE INVENTION
  • The present invention provides a method for reducing adhesion of the fibrous material web to a rotating roll. [0006]
  • In accordance with the present invention, a steam cushion is produced between the roll and the fibrous material web. [0007]
  • Since the steam cushion reduces or substantially hinders direct contact of the fibrous material web with the surface of the roll, the forces necessary for removing the fibrous material web from the roll are reduced considerably. [0008]
  • The steam cushion can be produced, e.g., by heating the roll to a very high temperature that is higher than necessary for the processing of the web. For example, the temperature of the surface of the roll can be heated to a temperature at produces steam from the damp material web, e.g., temperature values greater than approximately 120° C. [0009]
  • It is also possible to produce the steam cushion via heating of the roll and/or via blowing hot steam into an inlet opening between the roll and the fibrous material web. [0010]
  • The process is particularly applicable for use in parts of the machine in which the temperature of the fibrous material web is less than approximately 70°C. and/or the dry content of the fibrous material web is less a approximately 60%. The method of the present invention is particularly advantageous in these areas of the machine, e.g., press sections for draining or dryer section for drying, because adhesion is particularly strong. [0011]
  • Accordingly, the present invention is directed to a method to reduce adhesion of a damp fibrous material web to a rotating roll. The method includes producing a steam cushion between the rotating roll and the fibrous material web. [0012]
  • In accordance with another feature of the present invention, the producing of the steam cushion includes heating the rotating roll to a temperature that is higher than a temperature necessary for one of drying or draining of the fibrous material web. The heating of the rotating roll may include heating the surface of the rotating roll to a temperature of greater than approximately 120°C. [0013]
  • In accordance with another feature of the present invention, the method includes blowing steam into an inlet opening between the rotating roll and the fibrous material web. [0014]
  • In accordance with still another feature of the present invention, the temperature of the fibrous material web being guided to the rotating roll is less than approximately 70°C. and/or the dry content of the fibrous material web being guided to the rotating roll is less than approximately 60%. Further, the rotating roll can be located within a press section for draining the fibrous material web. The rotating roll can also be located within a dryer section for drying the fibrous material web. [0015]
  • In accordance with yet another feature of the present invention, the fibrous material web is composed of one of a paper and textile web. [0016]
  • In accordance with a further feature of the present invention, the fibrous material web guided to the rotating roll has at least one of the temperature of less than approximately 70° C. and a dry content of less than approximately 60%. [0017]
  • In accordance with a still further feature of the present invention, the rotating roll may be positioned in a section of a web producing machine in which the fibrous material web has at least one of the temperature less than approximately 70°C. and a dry content less than approximately 60%. Further, the rotating roll may be positioned in at least one of a press section and a dryer section. Still further, the rotating roll may be positioned in an initial area of the dryer section. The method may further include rewetting the fibrous material web in the dryer section prior to guiding the fibrous material web to the rotating roll. [0018]
  • Other exemplary embodiments and advantages of the present invention may be ascertained by reviewing the present disclosure and the accompanying drawing. [0019]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present invention is further described in the detailed description which follows, in reference to the noted drawing by way of non-limiting examples of embodiments of the present invention, and wherein: [0020]
  • The FIGURE illustrates a web being guided through a press device. [0021]
    • DETAILED DESCRIPTION OF THE PRESENT INVENTION
  • The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard no attempt is made to show structural details of the present invention in more detail than necessary for the fundamental understanding of the present invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the present invention may be embodied in practice. [0022]
  • In the FIGURE, a portion of a press section is depicted in which a fibrous material web [0023] 1 is guided rough a press nip (opening) by a continuous draining felt 2. The press nip is formed by two rolls 4 and 5, in which roll 4 has a smooth surface.
  • To reduce adhesion of fibrous material web [0024] 1 to the smooth surface of roll 4, roll 4 is heated to as high a temperature as possible, e.g., over approximately 120° C. In this manner, evaporation of a part of the water in fibrous material web 1 occurs to form a steam cushion between fibrous material web 1 and roll 4. Various different heating systems may be utilized, e.g., electric systems or heated oil based systems, for heating roll 4. Moreover, hot steam may be blown into an inlet side of the nip between roll 4 and fibrous material web 1 via a steam blow box 3. In this manner, the steam cushion may be enlarged.
  • The present invention may also be utilized in dryer sections in which heated dryer cylinders are looped by fibrous material web [0025] 1. The dryer cylinders can be heated to a temperature substantially higher than a temperature necessary for drying the web so as to create the steam cushion. Further, steam blow boxes 3 may be arranged at an inlet opting between fibrous material web 1 and the dryer cylinder.
  • Because the process can be advantageously practiced where the temperature of fibrous material web [0026] 1 is under approximately 70°C. and/or the dry content of fibrous material web 1 is under approximately 60%, the most advantageous areas within the dryer section of the web producing mache for practicing the method of the present invention is in an initial area of the dryer section or in all initial area of an end drying section, e.g., if a strong rewetting occurs in a size press or the like.
  • It is noted that the foregoing examples have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the present invention. While the present invention has been described with reference to a preferred embodiment, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitation. Changes may be made, within the purview of the appended claims, as presently stated and as amended, without departing from the scope and spirit of the present invention in its aspects. Although the present invention has been described herein with reference to particular means, materials and embodiments, the present invention is not intended to be limited to the particulars disclosed herein; rather, the present invention extends to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims. [0027]

Claims (17)

What is claimed is:
1. A method to reduce adhesion of a damp fibrous material web to a rotating roll comprising:
producing a steam cushion between the rotating roll and the fibrous material web.
2. The method in accordance with
claim 1
, the producing of the steam cushion comprising:
heating the rotating roll to a temperature that is higher than a temperature necessary for one of drying or draining of the fibrous material web.
3. The method in accordance with
claim 2
, the heating of the rotating roll comprising heating the surface of the rotating roll to a temperature of greater than approximately 120°C.
4. The method in accordance with
claim 1
, further comprising:
blowing steam into an inlet opening between the rotating roll and the fibrous material web.
5. The method in accordance with
claim 1
, wherein a temperature of the fibrous material web being guided to the rotating roll is less than approximately 70°C.
6. The method in accordance with
claim 5
, wherein the rotating roll is located within a press section for draining file fibrous material web.
7. The method in accordance with
claim 5
, wherein the rotating roll is located within a dryer section for drying the fibrous material web.
8. The method in accordance with
claim 1
, wherein a dry content of the fibrous material web being guided to the rotating roll is less than approximately 60%.
9. The method in accordance with
claim 8
, wherein the rotating roll is located within a press section for draining the fibrous material web.
10. The method in accordance with
claim 8
, wherein the rotating roll is located within a dryer section for drying the fibrous material web.
11. The method in accordance with
claim 1
, wherein the fibrous material web is composed of one of a paper and textile web.
12. The method in accordance with
claim 1
, the producing of the steam cushion comprising:
blowing steam into an inlet opening between the rotating roll and the fibrous material web.
13. The method in accordance with
claim 1
, wherein the fibrous material web being guided to the rotating roll has at least one of the temperature of less an approximately 70°C. and a dry content of less than approximately 60%.
14. The method in accordance with
claim 1
, wherein the rotating roll is positioned in a section of a web producing machine in which the fibrous material web has at least one of the temperature less than approximately 70°C. and a dry content less than approximately 60%.
15. The method in accordance with
claim 14
, wherein the rotating roll is positioned in at least one of a press section and a dryer section.
16. The method in accordance with
claim 15
, wherein the rotating roll is positioned in an initial area of the dryer section.
17. The method in accordance with
claim 15
, further comprising:
rewetting the fibrous material web in the dryer section prior to guiding the fibrous material web to the rotating roll.
US09/153,344 1997-09-20 1998-09-15 Method to reduce the adhesion of a damp fibrous material web to a rotating roll Expired - Fee Related US6436239B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19741517 1997-09-20
DE19741517A DE19741517A1 (en) 1997-09-20 1997-09-20 Process for reducing the adhesion of a moist fibrous web to a rotating roller
DE19741517.2 1997-09-20

Publications (2)

Publication Number Publication Date
US20010007279A1 true US20010007279A1 (en) 2001-07-12
US6436239B2 US6436239B2 (en) 2002-08-20

Family

ID=7843040

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/153,344 Expired - Fee Related US6436239B2 (en) 1997-09-20 1998-09-15 Method to reduce the adhesion of a damp fibrous material web to a rotating roll

Country Status (3)

Country Link
US (1) US6436239B2 (en)
EP (1) EP0903437A3 (en)
DE (1) DE19741517A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008525759A (en) * 2004-12-31 2008-07-17 メッツォ ペーパー インコーポレイテッド Method for improving paper passing in a drying section of a paper machine, method of using a rotary drying cylinder, drying section of a paper machine, and method of selecting a drying method
EP2732335A4 (en) * 2011-07-14 2015-02-25 Reald Inc Optical systems with compact back focal lengths
US9743076B2 (en) 2008-05-09 2017-08-22 Reald Inc. Optical systems with compact back focal lengths
EP3339507B1 (en) 2016-12-21 2019-04-17 Voith Patent GmbH Method for operating a heating group subsystem and heating group subsystem

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19958867A1 (en) * 1999-12-07 2001-07-12 Voith Paper Patent Gmbh Fiber web drying station has controlled parameters for the drying blanket tension and the temp of the drying cylinders for a trouble-free web passage through the station at high speeds
DE10311993A1 (en) 2003-03-19 2004-10-14 Voith Paper Patent Gmbh Process for treating a fibrous web

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US96039A (en) * 1869-10-19 Improved attachment to rolls for calendering paper-boards
GB598111A (en) * 1945-04-12 1948-02-11 Carrier Ross Engineering Compa Withdrawing vapour from paper-making or other machines for drying webs of material
DE588546C (en) * 1930-12-16 1933-11-25 Rudolf Steinmetz Suction device for the steam and supply device for warm air to drying sections for paper machines
DE579525C (en) * 1932-02-25 1933-06-27 Netzschkauer Maschinenfabrik F Drying section on paper and dewatering machines
US3097933A (en) * 1958-07-07 1963-07-16 Kimberly Clark Co Papermaking drying machine
DE1635343A1 (en) * 1966-10-12 1971-04-01 Vepa Ag Method and device for the non-contact heat treatment of goods that can be stressed in longitudinal direction
US3560333A (en) * 1967-08-15 1971-02-02 Scott Paper Co Method and apparatus for drying paper on a yankee dryer
SE364328B (en) * 1969-01-27 1974-02-18 Tampella Oy Ab
FR2106708A5 (en) * 1970-09-22 1972-05-05 Chamouton Daniel
US4351700A (en) * 1980-06-23 1982-09-28 Dove Norman F Steam distribution apparatus for the nip of two rolls
US4596333A (en) * 1983-10-31 1986-06-24 Gilreath Charles T Sheet holder
FI89085C (en) * 1987-01-23 1993-08-10 Valmet Paperikoneet Oy Regulating procedure for a paper machine press section
FI75890C (en) * 1987-01-23 1988-08-08 Valmet Paperikoneet Oy FOERFARANDE OCH ANORDNING I PRESSPARTIET I EN PAPPERSMASKIN FOER LOESGOERING AV BANAN FRAON YTAN AV EN PRESSVALS.
US4876803A (en) 1987-02-13 1989-10-31 Beloit Corporation Dryer apparatus for drying a web
CA1328167C (en) 1987-02-13 1994-04-05 Borgeir Skaugen Apparatus for drying a web
US5507104A (en) 1987-02-13 1996-04-16 Beloit Technologies, Inc. Web drying apparatus
US4934067A (en) 1987-02-13 1990-06-19 Beloit Corporation Apparatus for drying a web
US5404653A (en) * 1987-02-13 1995-04-11 Beloit Technologies, Inc. Apparatus for drying a web
EP0289477A3 (en) * 1987-04-28 1989-03-08 Valmet Paper Machinery Inc. Method for hot-pressing of a paper web and a drying device for the implementation of the method
FI93663C (en) * 1990-06-06 1995-05-10 Valmet Paper Machinery Inc Method and apparatus in a press section of a paper machine provided with a separate press
FI92941C (en) * 1991-01-18 1995-01-25 Valmet Paper Machinery Inc Method and apparatus in the press portion of a paper machine for detaching the web from the surface of a press roll
DE4126233C1 (en) 1991-08-08 1992-09-17 Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De
FI95061C (en) * 1993-03-08 1995-12-11 Valmet Paper Machinery Inc Method of calendering paper web and calender for application of the method
FI100013B (en) * 1993-03-22 1997-08-15 Valmet Paper Machinery Inc Drying procedure and drying module and drying portions where applied, especially for a fast-moving paper machine
DE4415581C2 (en) * 1994-05-04 1995-12-07 Voith Gmbh J M Paper coating device
SE502817C2 (en) * 1994-07-04 1996-01-22 Flaekt Ab Device adapted to reduce the effects of a paper web's tendency to adhere to a drying cylinder in a paper machine
DE19731100A1 (en) * 1997-07-19 1999-01-21 Voith Sulzer Papiermasch Gmbh Web adhesion adjustment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008525759A (en) * 2004-12-31 2008-07-17 メッツォ ペーパー インコーポレイテッド Method for improving paper passing in a drying section of a paper machine, method of using a rotary drying cylinder, drying section of a paper machine, and method of selecting a drying method
US9743076B2 (en) 2008-05-09 2017-08-22 Reald Inc. Optical systems with compact back focal lengths
EP2732335A4 (en) * 2011-07-14 2015-02-25 Reald Inc Optical systems with compact back focal lengths
EP3339507B1 (en) 2016-12-21 2019-04-17 Voith Patent GmbH Method for operating a heating group subsystem and heating group subsystem

Also Published As

Publication number Publication date
EP0903437A3 (en) 2000-04-05
EP0903437A2 (en) 1999-03-24
DE19741517A1 (en) 1999-03-25
US6436239B2 (en) 2002-08-20

Similar Documents

Publication Publication Date Title
US8349138B2 (en) Device for treating a pulp web in an extended nip pressing unit
JPH0343397B2 (en)
CA2314347A1 (en) Paper machine and process
CA2097847A1 (en) Method and device for intensifying the operation of a yankee press in a soft-tissue paper machine
US4238284A (en) Method for dewatering a tissue web
US6436239B2 (en) Method to reduce the adhesion of a damp fibrous material web to a rotating roll
US6442865B1 (en) Drying section
EP1012383B1 (en) Method for control of the curl of paper in the dryer section of a paper machine and paper or board machine
EP0168464B1 (en) A method and apparatus for drying a moist fibre web
EP1392916B1 (en) Method for the manufacture of paper or board
US6658758B2 (en) Drying section with impingement drying unit
US6716308B2 (en) Method for calendering an uncreped throughdried tissue sheet
US6493962B2 (en) Drying section
AU2002236601A1 (en) Method for calendering an uncreped throughdried tissue sheet
EP1208266B1 (en) Method and arrangement for surface treatment of a paper and/or board web
US3526574A (en) Vacuum transfer device in papermaking machine
EP0483183B1 (en) Method and apparatus for manufacture of smooth and glossy papers
US7192507B2 (en) Machine for producing a fibrous material web
US6490811B1 (en) Apparatus for controlling shrinkage in a fiber web during a drying process and associated method
CA2373096C (en) Method and arrangement for blowing compensation of a tendency of curling of a paper board web to be treated as well as a paper or board machine
US6488814B2 (en) Pressing arrangement
KR19990072509A (en) A drying section apparatus
Poirier et al. Papermaking
US6131304A (en) Dryer section
US6159343A (en) Press-to-dryer apparatus

Legal Events

Date Code Title Description
AS Assignment

Owner name: VOITH SULZER PAPIERMASCHINEN GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KUSTERMANN, DR. MARTIN;REEL/FRAME:009465/0880

Effective date: 19980915

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
FPAY Fee payment

Year of fee payment: 8

SULP Surcharge for late payment

Year of fee payment: 7

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20140820