EP0523144B1 - Verfahren zur beidseitigen beschichtung einer beweglichen bahn - Google Patents
Verfahren zur beidseitigen beschichtung einer beweglichen bahn Download PDFInfo
- 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
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000000576 coating method Methods 0.000 title claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 20
- 238000000151 deposition Methods 0.000 claims abstract description 5
- 230000003031 feeding effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 1
Images
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)
- 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.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß beide Umfangsgeschwindigkeiten der Übertragungswalzen (3, 5) von der Geschwindigkeit der beweglichen Bahn (7) abweichen.
- 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).
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß beide Umfangsgeschwindigkeiten von der Geschwindigkeit der Bahn (7) in etwa gleichem Grad abweichen.
- 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.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß diese Abweichung in einem Bereich von 0,5 % bis 2,5 % liegt.
- 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.
- 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.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß es zur beidseitigen Beschichtung einer beweglichen Papierbahn (7) verwendet wird.
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)
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)
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 |
-
1990
- 1990-04-03 SE SE9001219A patent/SE465709B/sv not_active IP Right Cessation
-
1991
- 1991-03-18 AT AT91907563T patent/ATE122269T1/de not_active IP Right Cessation
- 1991-03-18 JP JP3507057A patent/JP3010068B2/ja not_active Expired - Fee Related
- 1991-03-18 DE DE69109670T patent/DE69109670T2/de not_active Expired - Fee Related
- 1991-03-18 EP EP91907563A patent/EP0523144B1/de not_active Expired - Lifetime
- 1991-03-18 WO PCT/SE1991/000206 patent/WO1991015306A1/en active IP Right Grant
-
1992
- 1992-09-29 FI FI924374A patent/FI106934B/fi not_active IP Right Cessation
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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