SE8504564L - PROCEDURE FOR REMOVING THE WATER FROM A FIBER COAT, SPECIFICALLY FROM A PAPER OR CARTON COAT AND A WATER PRESSURE IN A PAPER MACHINE FOR APPLICATION OF THE PROCEDURE - Google Patents

PROCEDURE FOR REMOVING THE WATER FROM A FIBER COAT, SPECIFICALLY FROM A PAPER OR CARTON COAT AND A WATER PRESSURE IN A PAPER MACHINE FOR APPLICATION OF THE PROCEDURE

Info

Publication number
SE8504564L
SE8504564L SE8504564A SE8504564A SE8504564L SE 8504564 L SE8504564 L SE 8504564L SE 8504564 A SE8504564 A SE 8504564A SE 8504564 A SE8504564 A SE 8504564A SE 8504564 L SE8504564 L SE 8504564L
Authority
SE
Sweden
Prior art keywords
press
water
procedure
coat
web
Prior art date
Application number
SE8504564A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE8504564D0 (en
Inventor
O Skytte
V Sailas
Original Assignee
Valmet Oy
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 Valmet Oy filed Critical Valmet Oy
Publication of SE8504564D0 publication Critical patent/SE8504564D0/en
Publication of SE8504564L publication Critical patent/SE8504564L/en

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

Landscapes

  • Paper (AREA)

Abstract

In the process for the press treatment of a fibre material web, in particular a paper web or cardboard web (W), a press nip (NL) is used which is formed between two press rollers (10, 11) and through which the web (W) to be dried by pressing is carried by a cloth or a water-absorbing belt or passed between cloths (17, 24) and/or a water-absorbing belt. In addition, one or more elastic press belts (30) are passed through the press nip. The maximum pressure force (pmax) to be exerted in the process is selected between an upper limit (p2) and a lower limit (p1), the upper limit (p2) being less than 130 bar and less than the function p2max (L) which, with increasing length (L) of the press nip, is a decreasing function whose curve is determined mainly by the maximum available pressure momentum (Imax), and the lower limit (p1) being greater than 50 bar. The diameters of the said press rollers (10, 20) are selected in such a way and, as the said press belt, an elastic belt (30) is used whose thickness, construction and viscoelastic material properties are selected in such a way that, in the abovedefined range (p2-p1) of the maximum pressure force, the following length range (L) for the extended press nip (NL) confined between the rollers (10, 20) is designed with the following upper limit L2 and lower limit L1: L2 < 200 mm, ... Original abstract incomplete. <IMAGE>
SE8504564A 1984-10-03 1985-10-02 PROCEDURE FOR REMOVING THE WATER FROM A FIBER COAT, SPECIFICALLY FROM A PAPER OR CARTON COAT AND A WATER PRESSURE IN A PAPER MACHINE FOR APPLICATION OF THE PROCEDURE SE8504564L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI843895A FI843895L (en) 1984-10-03 1984-10-03 FOERFARANDE FOER AVLAEGSNANDE AV VATTEN FRAON EN FIBERBANA, SPECIELLT FRAON EN PAPPERS- ELLER KARTONGBANA OCH EN VAOTPRESS I EN PAPPERSMASKIN FOER TILLAEMPNING AV FOERFARANDET.

Publications (2)

Publication Number Publication Date
SE8504564D0 SE8504564D0 (en) 1985-10-02
SE8504564L true SE8504564L (en) 1986-04-04

Family

ID=8519686

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8504564A SE8504564L (en) 1984-10-03 1985-10-02 PROCEDURE FOR REMOVING THE WATER FROM A FIBER COAT, SPECIFICALLY FROM A PAPER OR CARTON COAT AND A WATER PRESSURE IN A PAPER MACHINE FOR APPLICATION OF THE PROCEDURE

Country Status (3)

Country Link
DE (1) DE3534836A1 (en)
FI (1) FI843895L (en)
SE (1) SE8504564L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI86652C (en) * 1989-04-19 1992-09-25 Tampella Oy Ab Device in a paper machine for providing dewatering on the surface
CA2469666A1 (en) 2002-01-29 2003-08-07 Metso Paper, Inc. Processing device and method of operating the device for processing a coated or uncoated fibrous web

Also Published As

Publication number Publication date
SE8504564D0 (en) 1985-10-02
FI843895L (en) 1986-04-04
FI843895A0 (en) 1984-10-03
DE3534836A1 (en) 1986-04-17

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