EP0523144B1 - Verfahren zur beidseitigen beschichtung einer beweglichen bahn - Google Patents

Verfahren zur beidseitigen beschichtung einer beweglichen bahn Download PDF

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Publication number
EP0523144B1
EP0523144B1 EP91907563A EP91907563A EP0523144B1 EP 0523144 B1 EP0523144 B1 EP 0523144B1 EP 91907563 A EP91907563 A EP 91907563A EP 91907563 A EP91907563 A EP 91907563A EP 0523144 B1 EP0523144 B1 EP 0523144B1
Authority
EP
European Patent Office
Prior art keywords
web
transfer rollers
speed
process according
coating
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.)
Expired - Lifetime
Application number
EP91907563A
Other languages
English (en)
French (fr)
Other versions
EP0523144A1 (de
Inventor
Tore Eriksson
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.)
BTG Eclepens SA
BTG Kalle Inventing AB
Original Assignee
BTG Eclepens SA
BTG Kalle Inventing AB
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 BTG Eclepens SA, BTG Kalle Inventing AB filed Critical BTG Eclepens SA
Publication of EP0523144A1 publication Critical patent/EP0523144A1/de
Application granted granted Critical
Publication of EP0523144B1 publication Critical patent/EP0523144B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • D21H23/58—Details thereof, e.g. surface characteristics, peripheral speed

Definitions

  • the present invention relates to a process for two-faced coating of a travelling web, for example a paper web, while using two juxtaposed transfer roller between which the web travels with deposition of coating agent on both surfaces of the web.
  • roller coaters the coating agent is transferred indirectly to the paper by being first metered onto a press roller, so called transfer roller.
  • the pre-metered liquid film is then transferred to the paper web without the formation of excess of coating agent in the press nip.
  • An example of this technique is the so called gate roller coater which comprises two juxtaposed pressure rollers between which the web travels for levelling out the coating agent. These two press rollers are flanked on either side by roller pairs by means of which coating agent is transferred onto the mantel surfaces of press rollers and from said surfaces to the paper web.
  • metering coating liquid onto a roller examples include coaters using metering by means of blades or by means of rotary bars.
  • the present invention therefore has for an object to provide an improved process for two-faced coating of a travelling web while using two juxtaposed transfer rollers between which the web travels with deposition of coating agent on both sides of the web and where both transfer rollers in connection with the position of engagement with the web move in the same direction as the web.
  • the invention is based on the principle that the transfer rollers are imparted mutually different peripheral speeds, so that at least one of said peripheral speeds deviates from the the speed by which the web travels.
  • the process according to the invention is characterized by the fact that the transfer rollers are set at an engagement pressure in the nip of up to 10 N/mm and that the transfer rollers have a surface hardness of at most 60 Shore A.
  • both peripheral speeds of the transfer rollers deviate from the speed of the travelling web, and it is particularly preferred that the peripheral speed of one of the transfer rollers exceeds the speed of the web, whereas the peripheral speed of the other transfer roller is lower than the speed of the web. In this connection it is preferred that the peripheral speeds of the transfer rollers deviate from the speed of the web at about the same degree.
  • the transfer rollers are set at an engagement pressure in the nip of from about 1 to about 10 N/mm and that transfer rollers are used having a surface hardness of at most about 60 Shore A.
  • the technique according to the present invention is particularly suitable for the coating of travelling paper webs.
  • the coating device illustrated in the drawing and generally indicated 1 comprises two transfer rollers 3 and 5, both rotating in the direction indicated by arrows a). Between these two transfer rollers 3,5 a paper web 7 is fed in the direction indicated by arrow b). Transfer rollers 3,5 are supplied with coating composition by means of applicators 13 and 15, respectively, and excess of coating composition 21,23 is returned to containers 17,19. Metering rollers 9,11 are rotated in a direction indicated by arrows c) and they have a speed which is significantly lower than the rotational speed of transfer rollers 3,5.
  • the surprising improvement of the coating obtained by the process according to the present invention is above all related to the so called film-split effect which causes orange peel pattern in the layer applied.
  • the low engagement pressure enables differences in the peripheral speeds of transfer rollers 3,5, on the one hand in relation to each other, on the other hand in relation to the travelling speed of paper web 7.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Paper (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Control Of El Displays (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Powder Metallurgy (AREA)
  • Sliding-Contact Bearings (AREA)
  • Coating Apparatus (AREA)

Claims (9)

  1. Verfahren für die beidseitige Beschichtung einer beweglichen Bahn (7) mittels zweier nebeneinandergelegter Übertragungswalzen (3, 5), während ein Beschichtungsmittel auf beiden Seiten der Bahn aufgebracht wird, wobei sich die Übertragungswalzen (3, 5) und die Bahn (7) in derselben Richtung bewegen, dadurch gekennzeichnet, daß den Übertragungswalzen (3, 5) zueinander unterschiedliche Umfangsgeschwindigkeiten verliehen werden, so daß mindestens eine dieser Geschwindigkeiten von der Bahngeschwindigkeit abweicht, daß die Übertragungswalzen (3, 5) eine Oberflächenhärte von bis zu 60 Shore A haben und daß die Übertragungswalzen (3, 5) in dem Spalt einem Anpreßdruck von bis zu 10 N/mm ausgesetzt werden.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß beide Umfangsgeschwindigkeiten der Übertragungswalzen (3, 5) von der Geschwindigkeit der beweglichen Bahn (7) abweichen.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Umfangsgeschwindigkeit von einer der Übertragungswalzen (3, 5) die der Bahn (7) übersteigt, während die Umfangsgeschwindigkeit der anderen Übertragungswalze niedriger ist als die der Bahn (7).
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß beide Umfangsgeschwindigkeiten von der Geschwindigkeit der Bahn (7) in etwa gleichem Grad abweichen.
  5. Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Abweichung der Umfangsgeschwindigkeiten von der Geschwindigkeit der Bahn (7) bis etwa 5 % beträgt.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß diese Abweichung in einem Bereich von 0,5 % bis 2,5 % liegt.
  7. Verfahren nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die Bahn (7) in verlängerten Eingriff mit der Übertragungswalze (3, 5) gebracht wird, deren Umfangsgeschwindigkeit die der Bahn übersteigt, wodurch ein gewisser Einspeiseffekt erreicht wird.
  8. Verfahren nach Anspruch 3, 4 oder 5, dadurch gekennzeichnet, daß die Übertragungswalzen (3, 5) in dem Spalt auf einen Anpreßdruck von 1 N/mm bis 10 N/mm eingestellt werden, und daß die Übertraungswalzen eine Oberflächenhärte von bis zu 60 Shore A besitzen.
  9. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß es zur beidseitigen Beschichtung einer beweglichen Papierbahn (7) verwendet wird.
EP91907563A 1990-04-03 1991-03-18 Verfahren zur beidseitigen beschichtung einer beweglichen bahn Expired - Lifetime EP0523144B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9001219 1990-04-03
SE9001219A SE465709B (sv) 1990-04-03 1990-04-03 Foerfarande foer tvaasidig bestrykning av en loepande bana medelst tvaa motstaellda oeverfoeringsvalsar
PCT/SE1991/000206 WO1991015306A1 (en) 1990-04-03 1991-03-18 Process for two-faced coating of a travelling web

Publications (2)

Publication Number Publication Date
EP0523144A1 EP0523144A1 (de) 1993-01-20
EP0523144B1 true EP0523144B1 (de) 1995-05-10

Family

ID=20379084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91907563A Expired - Lifetime EP0523144B1 (de) 1990-04-03 1991-03-18 Verfahren zur beidseitigen beschichtung einer beweglichen bahn

Country Status (7)

Country Link
EP (1) EP0523144B1 (de)
JP (1) JP3010068B2 (de)
AT (1) ATE122269T1 (de)
DE (1) DE69109670T2 (de)
FI (1) FI106934B (de)
SE (1) SE465709B (de)
WO (1) WO1991015306A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243518C2 (de) * 1992-12-22 1996-03-28 Feldmuehle Ag Stora Vorrichtungen zum Auftrag von Flüssigkeit auf beide Seiten einer Materialbahn und Verfahren zum Auftrag einer Flüssigkeit auf eine Materialbahn mit diesen Vorrichtungen
DE19511050A1 (de) * 1995-03-25 1996-09-26 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zur Herstellung einer eine CF-Schicht aufweisenden Papierbahn
FR2746264B1 (fr) * 1996-03-25 1998-05-22 Picardie Lainiere Procede de fabrication d'un entoilage thermocollant et entoilage thermocollant ainsi obtenu
EP0799934A1 (de) * 1996-04-03 1997-10-08 Voith Sulzer Papiermaschinen GmbH Verfahren und Vorrichtung zur Herstellung einer CB-Schicht aufweisenden Papierbahn
CA2325906A1 (en) * 1997-10-31 1999-05-14 James L. Chance High speed coating apparatus and method
ATE275439T1 (de) * 2000-12-22 2004-09-15 Tarkett Sommer Sa Verfahren und vorrichtung zur indirekten auftragung einer dünnen schicht
ITMI20010265A1 (it) * 2001-02-09 2002-08-09 Ind Cartarie Tronchetti Spa Apparecchiatura e metodo per applicare un fluido ad un nastro di carta
FI110957B (fi) * 2001-12-10 2003-04-30 Metso Paper Inc Menetelmä ja sovitelma monikerrospäällystyksen tekemiseksi
SE529814C2 (sv) 2006-04-11 2007-11-27 Mattssonfoeretagen I Uddevalla Trådlindad gravyrvals och metod för dess framställning
DE102006044822A1 (de) * 2006-09-20 2008-04-03 Voith Patent Gmbh Verfahren zur Herstellung einer beschichteten Papier-, Karton- oder anderen Faserstoffbahn

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8001814A (nl) * 1980-03-27 1981-10-16 Stork Brabant Bv Werkwijze en inrichting voor het bekleden van een poreus substraat.
DE3417487A1 (de) * 1984-05-11 1985-11-21 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum auftragen einer fluessigkeit auf eine laufende bahn
GB2213406B (en) * 1987-12-08 1992-05-20 Molins Plc Coating apparatus and method
GB8904112D0 (en) * 1989-02-23 1989-04-05 Wiggins Teape Group Ltd Process for applying microcapsule-containing compositions to paper

Also Published As

Publication number Publication date
DE69109670T2 (de) 1995-09-07
WO1991015306A1 (en) 1991-10-17
SE9001219A (de) 1991-10-04
EP0523144A1 (de) 1993-01-20
SE9001219D0 (sv) 1990-04-03
DE69109670D1 (de) 1995-06-14
JPH05505971A (ja) 1993-09-02
FI924374A0 (fi) 1992-09-29
FI106934B (fi) 2001-05-15
JP3010068B2 (ja) 2000-02-14
FI924374A (fi) 1992-09-29
SE465709B (sv) 1991-10-21
ATE122269T1 (de) 1995-05-15

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