CA2317438A1 - Method for maximizing water removal in a press nip - Google Patents

Method for maximizing water removal in a press nip Download PDF

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Publication number
CA2317438A1
CA2317438A1 CA002317438A CA2317438A CA2317438A1 CA 2317438 A1 CA2317438 A1 CA 2317438A1 CA 002317438 A CA002317438 A CA 002317438A CA 2317438 A CA2317438 A CA 2317438A CA 2317438 A1 CA2317438 A1 CA 2317438A1
Authority
CA
Canada
Prior art keywords
water removal
present
pressing unit
pressure profile
efficiency
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
CA002317438A
Other languages
French (fr)
Other versions
CA2317438C (en
Inventor
Robert J. Marinack
Jeffrey Charles Mcdowell
Gary L. Worry
Steven L. Edwards
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
Robert J. Marinack
Jeffrey Charles Mcdowell
Gary L. Worry
Steven L. Edwards
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, Robert J. Marinack, Jeffrey Charles Mcdowell, Gary L. Worry, Steven L. Edwards, Georgia-Pacific Consumer Products Lp, Gpcp Ip Holdings Llc filed Critical Fort James Corporation
Publication of CA2317438A1 publication Critical patent/CA2317438A1/en
Application granted granted Critical
Publication of CA2317438C publication Critical patent/CA2317438C/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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • 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
    • 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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • 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
    • D21F3/0281—Wet presses in combination with a dryer roll
    • 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
    • D21F3/029—Wet presses using special water-receiving belts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • D21H25/14—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod the body being a casting drum, a heated roll or a calender

Abstract

The present invention is a method for maximizing water removal from an absorbent web in a press nip, thus improving the efficiency of a papermaking machine. The present invention uses a pressing unit having a blanket with a void volume and with a pressure profile that maximizes water removal in the press section or on the Yankee dryer of a paper machine. The pressure profile of the pressing unit according to the present invention has a very steep pressure drop at and/or following the exit of a pressure distribution curve in order to maximize water removal by minimizing rewet of the web.
The improved pressure profile according to the present invention results in increased water removal and/or improved line speed, thus improving efficiency. The configuration and low void volume of the pressing unit blank may further increase water removal and/or improve line speed, which also improves efficiency.
CA002317438A 1998-11-13 1999-11-12 Method for maximizing water removal in a press nip Expired - Lifetime CA2317438C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/191,376 1998-11-13
US09/191,376 US6248210B1 (en) 1998-11-13 1998-11-13 Method for maximizing water removal in a press nip
PCT/US1999/027097 WO2000029667A1 (en) 1998-11-13 1999-11-12 Method for maximizing water removal in a press nip

Publications (2)

Publication Number Publication Date
CA2317438A1 true CA2317438A1 (en) 2000-05-25
CA2317438C CA2317438C (en) 2008-10-28

Family

ID=22705241

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002317438A Expired - Lifetime CA2317438C (en) 1998-11-13 1999-11-12 Method for maximizing water removal in a press nip

Country Status (5)

Country Link
US (7) US6248210B1 (en)
EP (1) EP1047830A1 (en)
CA (1) CA2317438C (en)
TR (1) TR200002032T1 (en)
WO (1) WO2000029667A1 (en)

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US6387217B1 (en) 2002-05-14
US7300552B2 (en) 2007-11-27
US6517672B2 (en) 2003-02-11
US20030226650A1 (en) 2003-12-11
US20080035289A1 (en) 2008-02-14
US20020088595A1 (en) 2002-07-11
US7754049B2 (en) 2010-07-13
WO2000029667A1 (en) 2000-05-25
US6458248B1 (en) 2002-10-01
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US6669821B2 (en) 2003-12-30
CA2317438C (en) 2008-10-28

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