EP1072720A2 - Procédé et dispositif pour la fabrication d'une bande fibreuse - Google Patents

Procédé et dispositif pour la fabrication d'une bande fibreuse Download PDF

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Publication number
EP1072720A2
EP1072720A2 EP00109696A EP00109696A EP1072720A2 EP 1072720 A2 EP1072720 A2 EP 1072720A2 EP 00109696 A EP00109696 A EP 00109696A EP 00109696 A EP00109696 A EP 00109696A EP 1072720 A2 EP1072720 A2 EP 1072720A2
Authority
EP
European Patent Office
Prior art keywords
web
fibrous web
belt
elastic band
band
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
EP00109696A
Other languages
German (de)
English (en)
Other versions
EP1072720A3 (fr
EP1072720B1 (fr
Inventor
Günter Dr. Halmschlager
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 Patent GmbH
Original Assignee
Voith Paper Patent 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1072720A2 publication Critical patent/EP1072720A2/fr
Publication of EP1072720A3 publication Critical patent/EP1072720A3/fr
Application granted granted Critical
Publication of EP1072720B1 publication Critical patent/EP1072720B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections
    • 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

Definitions

  • the invention relates to a method for producing a fibrous web, in particular a paper or cardboard web in which the fibrous web to influence certain web properties such as in particular Path structure and / or the fiber orientation treated accordingly becomes. It also relates to a corresponding device according to the preamble of claim 17.
  • edges of a fibrous web at a conventional drying method shrink more than the middle of the web. there there are different sheet properties across the web width.
  • the aim of the invention is to provide a method and an apparatus at the beginning to create the type mentioned, in which the aforementioned disadvantages are eliminated. It should in particular be simple and reliable also the possibility to be created, on the one hand the degree of orientation to influence the fibers transversely to the machine direction, preferably to increase, and on the other hand specifically the structure of the fibrous web to influence.
  • this object is achieved according to the invention solved that the fibrous web to influence the relevant web properties stretched in the transverse direction while still wet becomes.
  • the degree of orientation of the fibers across the machine direction to influence, preferably to increase, and on the other hand specifically to influence the structure of the fibrous web, if necessary targeted influencing across the web width is also possible is.
  • a targeted transverse expansion of the fibrous web in particular also reduced the tear length ratio. It also behaves elastic band when tensioning similar to a web in a dryer section, i.e. the edges behave due to the different boundary conditions different compared to the center of the web. Accordingly, there is also contraction of the tape across the width, with the effect that the web edges are stretched more than the center of the web. This effect counteracts increased edge shrinkage of the web in the dryer section and partially or fully compensates for this.
  • the fibrous web can reflect different properties of the web, for example a paper web, are influenced, if necessary also targeted across the web width.
  • properties of the fibrous web which can be influenced accordingly include, for example the porosity that increases as a result of loosening of the poultry can, the smoothness or the smoothness profile, the strengths in the transverse direction and the elongation properties in the longitudinal direction.
  • the open porosity achieved For example, the press performance and / or the Improve drying performance.
  • a better one or more even glue absorption can be achieved.
  • the still wet fibrous web is advantageously with a solids content from about 5 to about 65%, especially from about 5 to about 55 % and preferably stretched from about 15 to about 25% in the transverse direction.
  • the process starts with the fibrous web still wet endless elastic band passed in front of the transfer point in the longitudinal direction was stretched and its stretching behavior in the different Directions are dimensioned such that with the previous Longitudinal stretching of the ligament is primarily a transverse ligament contraction and accordingly with the longitudinal contraction taking place behind the transfer point of the band primarily sets a band transverse elongation and thereby the fibrous web is stretched accordingly in the transverse direction.
  • the stretching behavior of the elastic band is dimensioned so differently in the thickness and width direction that at least with a longitudinal stretching or contraction of the band essentially only a band cross contraction or band stretch without significant change in thickness.
  • the usual thickness variation is the fibers in the fibrous web no longer compressed, but reoriented.
  • the preceding stretching of the elastic band takes place in the longitudinal direction expediently immediately in front of the transfer point.
  • the longitudinal expansion of the tape before the fibrous web is taken up can done differently.
  • a practical practical Embodiment is driven by at least one elastic band rotating roller and in particular by at least two in opposite directions driven rotating rollers tensioned and thereby in the longitudinal direction stretched.
  • the fibrous web is preferably in the area of one or the last of these rollers to the elastic band.
  • the still wet fibrous web is expediently transferred to the elastic band with a solids content of the web of about 5 to about 65%, especially from about 5 to about 55%, and preferably from about 15 to about 25%.
  • the elastic Band In addition to the function of transverse expansion of the fibrous web, the elastic Band also perform one or more other functions.
  • an elastic band can also be used as a press felt serving tape can be used.
  • an elastic band is used a different stretch behavior across the web width, which creates different effects such as the one before mentioned effect of reduced edge shrinkage of the web can be achieved can.
  • an elastic band with a closed surface or a porous elastic band can be used.
  • the fibrous web through a conveyor belt such as in particular a wet screen, a transfer belt or the like passed to the elastic band.
  • a conveyor belt such as in particular a wet screen, a transfer belt or the like passed to the elastic band.
  • the device according to the invention is accordingly characterized in that that it includes means to influence the fibrous web certain web properties such as in particular the web structure and / or the fiber orientation while still wet in the transverse direction to stretch accordingly.
  • Figures 1 to 3 show a section of a device 10 for manufacturing a fibrous web 12, which may in particular be a paper or cardboard web.
  • the device 10 comprises means 14, 16 for the fibrous web 12 for Influencing certain web properties such as the web structure in particular and / or the fiber orientation while still wet Stretch the cross direction accordingly.
  • the fibrous web is still wet 12 takeover, in front of the takeover point A in the longitudinal direction stretched elastic band 14 provided by at least one driven rotating roller 16 tensioned and thereby accordingly in Is stretched in the longitudinal direction.
  • the fibrous web 12 is transported by a conveyor belt 18 such as in particular a wet sieve, a transfer belt or the like passed to the elastic band 14.
  • the elastic Band 14 passed over a guide roller 20.
  • the conveyor belt 18 is in front of the handover or takeover point, for example guided over a suction roller 24.
  • Figure 1 are also Deflecting pulleys 26, 28, over which the conveyor belt 18 behind the takeover point A is led.
  • the takeover point A at which the the driven roller 16 tensioned elastic band 14 the fibrous web 12 takes over from the conveyor belt 18, lies between the suction roller 24 and the deflection roller 26.
  • the driven belt can also be used Roller 16 be vacuumed.
  • the driven roller 16 with a corresponding suction zone 30 provided.
  • the conveyor belt 18 is extended the fibrous web 12 has been taken over by the elastic band 14 separated from the fibrous web 12 in the region of the driven roller 16, which then of the elastic stretched around the roller 16 Volume 14 is taken.
  • the elongation behavior of the elastic band 14 in the different Directions are dimensioned so that with the previous longitudinal expansion of the band 14 primarily a band transverse contraction and accordingly with the longitudinal contraction behind the takeover point A. of the band 14 primarily sets a band transverse elongation and thereby stretching the fibrous web 12 accordingly in the transverse direction becomes.
  • the expansion behavior of the elastic band 14 is in thickness and Width direction dimensioned so differently that with a longitudinal expansion or contraction of the band 14 at least in essentially only a band transverse contraction or band stretch without sets a substantial change in thickness.
  • FIG. 3 shows the tension curve of the belt section 14 'stretched around the driven roller 16. Thereafter, the belt tension S 1 in the web running direction L in front of the takeover point A is greater than the web tension S 2 behind this takeover point, it becoming increasingly smaller along the circumference of the roll. After receiving the fibrous web 12, the elastic band 14 thus at least essentially returns to its original shape, whereby the fibrous web 12 is stretched transversely to the web running direction L.
  • the elastic band 14 can also serve as a press felt. Basically it is also conceivable, for example, to use an elastic band 14, which also serves as a transfer belt.
  • the elastic band 14 can be different across the web width Have stretching behavior.
  • a porous elastic band 14 is provided which is driven around a vacuumed Roll 16 is tensioned, is basically the use of a elastic band 14 with a closed surface possible. In this case, the driven roller 16 would not be vacuumed.

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  • Paper (AREA)
EP00109696A 1999-07-28 2000-05-08 Procédé et dispositif pour la fabrication d'une bande fibreuse Expired - Lifetime EP1072720B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19935481A DE19935481A1 (de) 1999-07-28 1999-07-28 Verfahren und Vorrichtung zur Herstellung einer Faserstoffbahn
DE19935481 1999-07-28

Publications (3)

Publication Number Publication Date
EP1072720A2 true EP1072720A2 (fr) 2001-01-31
EP1072720A3 EP1072720A3 (fr) 2001-08-16
EP1072720B1 EP1072720B1 (fr) 2005-03-16

Family

ID=7916379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00109696A Expired - Lifetime EP1072720B1 (fr) 1999-07-28 2000-05-08 Procédé et dispositif pour la fabrication d'une bande fibreuse

Country Status (3)

Country Link
US (1) US6488810B1 (fr)
EP (1) EP1072720B1 (fr)
DE (2) DE19935481A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVE20110063A1 (it) * 2011-09-19 2013-03-20 Giorgio Trani Metodo di compensazione dimensionale di nastri di materiale fibroso.
WO2023030955A1 (fr) * 2021-09-02 2023-03-09 Voith Patent Gmbh Procédé et machine de fabrication de bande fibreuse
CN117615903A (zh) * 2021-07-14 2024-02-27 福伊特专利有限公司 辊子装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE518668C2 (sv) * 2001-03-13 2002-11-05 Tetra Laval Holdings & Finance Förpackningsbehållare, förpackningslaminat samt sätt att framställa en förpackningsbehållare
DE10116733A1 (de) * 2001-04-04 2002-10-10 Voith Paper Patent Gmbh Übergabeanordnung
US6845283B2 (en) * 2002-07-26 2005-01-18 Kimberly-Clark Worldwide, Inc. Process and apparatus for making articles
US7229528B2 (en) * 2003-12-19 2007-06-12 The Procter & Gamble Company Processes for foreshortening fibrous structures
US7419569B2 (en) * 2004-11-02 2008-09-02 Kimberly-Clark Worldwide, Inc. Paper manufacturing process
IT1400457B1 (it) * 2010-06-01 2013-05-31 Trani Metodo di realizzazione di nastri di materiale fibroso estensibile trasversalmente, in particolare di nastri di carta, ed apparecchiatura per effettuare il metodo.
JP7533781B2 (ja) * 2021-05-25 2024-08-14 三菱ケミカル株式会社 配向繊維ウェブの製造方法、繊維ウェブ形成装置および配向繊維ウェブ製造装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE25335E (en) * 1963-02-19 Extensible paper product and process
US1196888A (en) * 1912-08-06 1916-09-05 Theodore Scherf Process of softening paper.
US1582838A (en) * 1920-10-19 1926-04-27 Otaka Fabric Company Paper making
US1582842A (en) * 1924-08-11 1926-04-27 Otaka Fabric Company Elastic paper
US1676759A (en) * 1925-12-11 1928-07-10 Arkell Safety Bag Co Process and mechanism for producing stretchable paper
US2008182A (en) * 1932-07-29 1935-07-16 Paper Service Co Art of producing multilateral stretchability in paper webs or the like
US2996425A (en) * 1959-06-29 1961-08-15 St Regis Paper Co Extensible paper product and process
US3104197A (en) * 1959-06-29 1963-09-17 Crown Zellerbach Corp Extensible paper and the process of producing the same
US3161563A (en) * 1962-09-04 1964-12-15 Method and apparatus for the lateral stretching of webs, and resultant product
US3148108A (en) * 1962-10-29 1964-09-08 Clupak Inc Extensible non-combustible paper
GB993603A (en) * 1962-11-15 1965-06-02 Billeruds Ab Method of producing extensible paper
US3207657A (en) * 1963-01-22 1965-09-21 Huyck Corp Method and apparatus for making paper by contracting the forming carrier to compact the web
US3301173A (en) * 1965-10-21 1967-01-31 Clupak Inc Texturizing of flexible materials
US6146499A (en) * 1997-12-22 2000-11-14 Kimberly-Clark Worldwide, Inc. Method for increasing cross machine direction stretchability

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVE20110063A1 (it) * 2011-09-19 2013-03-20 Giorgio Trani Metodo di compensazione dimensionale di nastri di materiale fibroso.
WO2013041957A1 (fr) 2011-09-19 2013-03-28 Giorgio Trani Procédé de compensation dimensionnelle de bandes de matière fibreuse
CN117615903A (zh) * 2021-07-14 2024-02-27 福伊特专利有限公司 辊子装置
WO2023030955A1 (fr) * 2021-09-02 2023-03-09 Voith Patent Gmbh Procédé et machine de fabrication de bande fibreuse

Also Published As

Publication number Publication date
US6488810B1 (en) 2002-12-03
DE50009762D1 (de) 2005-04-21
EP1072720A3 (fr) 2001-08-16
EP1072720B1 (fr) 2005-03-16
DE19935481A1 (de) 2001-02-08

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