WO1998037275A1 - Procede de traitement de carton ou de papier, dispositif pour mettre en oeuvre ce procede et produit obtenu a l'aide de ces procede et dispositif - Google Patents

Procede de traitement de carton ou de papier, dispositif pour mettre en oeuvre ce procede et produit obtenu a l'aide de ces procede et dispositif Download PDF

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Publication number
WO1998037275A1
WO1998037275A1 PCT/FI1998/000157 FI9800157W WO9837275A1 WO 1998037275 A1 WO1998037275 A1 WO 1998037275A1 FI 9800157 W FI9800157 W FI 9800157W WO 9837275 A1 WO9837275 A1 WO 9837275A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
product
applicator
treating agent
rolls
Prior art date
Application number
PCT/FI1998/000157
Other languages
English (en)
Finnish (fi)
Inventor
Vesa Huovila
Original Assignee
Valmet Corporation
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 Corporation filed Critical Valmet Corporation
Priority to AU62173/98A priority Critical patent/AU6217398A/en
Publication of WO1998037275A1 publication Critical patent/WO1998037275A1/fr

Links

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
    • 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
    • B05C1/086—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 a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith
    • B05C1/0869—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 a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith the work contacting the pool
    • 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
    • B05C1/0813—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 characterised by means for supplying liquid or other fluent material to the roller
    • 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
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • D21H23/72—Plural serial stages only
    • 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
    • B05C1/083—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 being passed between the coating roller and one or more backing 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
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • 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

Definitions

  • the present invention relates to a method according to the preamble of claim 1 for coating, in particular, cardboard with a surface sizing agent and, if desired, also with a coating mix.
  • the method is also suited for treating paper.
  • the invention also relates to an arrangement for carrying out the method as well as a product produced by the method and means for carrying out the method.
  • Pond size presses and film transfer coaters are used for the surface sizing of board and paper.
  • the web being treated travels vertically through a nip formed by two opposed rolls. Size is applied to the nip between both rolls and the web such that it remains on the roll and forms a pool. Size is adhered to the web travelling through the pond and the metering is performed by controlling the nip between the rolls.
  • An advantage of the method lies in the large amount applied, this being beneficial particularly in the manufacture of board. The strength of the board to a great extent correlates with the amount of size used, and accordingly, pond size presses can be used to manufacture the strongest types of board of all.
  • CMT Aflat crush resistance
  • the applied amounts of size vary between 20 and 100 ml/in 2 , including the applied amounts on both sides of the web.
  • the typical amounts of size applied on the surface layer of cushion board, i.e. the so called liner, and on fluting, ' vary between 70 and 90 ml/m 2 .
  • a disadvantage related to pond size presses is the poor runnability which is due to the swirling of the ponds and vibrations on the incoming side of the web being treated, said poor runnability restricting the coating speed.
  • 900 m/min is considered the maximum speed applicable with pond size presses.
  • a lot of water is absorbed by the web partly due to the manner of application and partly because the dry matter content of size is small, merely about 10 % .
  • starch mixtures are usually used, and with the above-cited dry content of the coat and the applied amount, 8 to 10 g/m 2 of size will remain on the web once the size mixture is dry. The great amount of water will decrease the strength of the web and increase the drying capacity required.
  • the greatest possible applied amount on one size during surface sizing performed by means of a film transfer coater is approximately 20 to 25 g/m 2 . It is clear that when conventional film transfer coaters are used, the amounts of size required in the manufacture of strong paperboard grades cannot be attained during one sizing step. As it is not possible to have two or several surface sizing steps for cost reasons and also because of the great drying capacity required by two drying steps, paperboards requiring a large amount of surface sizing agent must be manufactured with slow pond size presses .
  • the present invention aims at providing a method which will allow the use of greater amounts . of treatment agents than are possible with film transfer coaters, as well as greater web speeds than can be applied in the case of pond size presses.
  • the treatment agent preferably comprises size.
  • the invention is based on applying treatment agent onto the one side of the web to be treated by pond application, and onto the other side by the film transfer coating method.
  • the invention offers considerable benefits.
  • Fig. 1 is a schematic view of an arrangement according to the invention.
  • Fig. 2 is a schematic representation of the arrangement of Fig. 1 in a different position of use.
  • Fig. 3 is a schematic representation of another embodiment of the invention.
  • the sizing agents used in surface sizing usually comprise starch mixtures, but in the following, the term size is employed to refer to all agents used to increase the strength of a web.
  • the arrangement shown in Fig. 1 comprises two applicator rolls 1, 2 arranged next to one another at the same height, namely a film transfer roll 2 and a pond applicator roll 1.
  • An applicator device 4 is provided for the film transfer roll 2, which can be used to apply the coat film 5 onto the surface of the roll.
  • the applicator device 4 may comprise any known applicator device which is used in film transfer coaters, such as a short-dwell coater equipped with a rod or blade doctor.
  • the web 3 is brought into the nip between the applicator rolls 1, 2 from the side of the film transfer roll 2 via a guide roll 9 such that the web 3 touches the film transfer roll 2 before the nip between the applicator rolls 1, 2.
  • a basin is formed between the web 3 and the pond applicator roll 1.
  • a size feeding device 6 is provided, by means of which it is possible to feed a size pond 7 into the basin.
  • a size pond 7 must be formed between the applicator rolls 1, 2, the web has to travel a relatively long distance along the surface of the film transfer roll 2, which will improve the transfer of size or coating mix from the film transfer roll 2 onto the web 3 surface.
  • the contact time between the film transfer roll 2 and the web 3 can be controlled, but at the same time the volume of the pond 7 is altered, and if the web 3 enters the nip between the applicator rolls 1, 2 in too straight a position, the film transfer roll 2 no longer supports the web 3 on the side opposite to the pond, whereby web vibrations may occur on the incoming side of the web 3.
  • the coated web 3 is taken to drying or other further treatment via the guide roll 8.
  • the apparatus of Fig. 2 is a mirror image of the apparatus shown in Fig. 1.
  • the film transfer roll 2 and the pond applicator roll 1 have changed places, wherefore the web must travel to the film transfer roll 2 folded via the guide roll 9 on the incoming side.
  • the apparatuses of Figs. 1 and 2 may be different apparatuses intended for the manufacture of a certain end product. However, it is more advantageous to be able to manufacture a large selection of products treated in different ways by means of one and the same machine.
  • an applicator device 4 is provided for both applicator rolls 1, 2 for applying film onto the roll surface, and one or two movable size feeding devices 6 are provided which can be used to feed size into the basin formed by the rolls and the web independent of on which side of the web said basin is located.
  • at least two guide rolls 9 must be provided on the incoming side, via which the web can be made to travel, or one movable guide roll 9 by means of which the travel of the web is altered to lead to the desired applicator roll.
  • the main incoming directions of the web are via one of the rolls or perpendicularly into the nip between the rolls 1, 2 from above the rolls. In addition to these main incoming directions it is possible to choose incoming angles between said main directions.
  • the above-described device can be used to treat the web in a very many-sided manner.
  • the amount applied per area is 0 to 25 ml/m 2 and for a pond size press it is 0 to 50 ml/m 2 , and accordingly, the total range of variation is 0 to 75 ml/m 2 .
  • the preferred field of application of the invention is the manufacture of grades where the total coat weight is greater than that achieved with two-sided film transfer coaters, i.e. 40 to 50 ml/m 2 .
  • film transfer coaters do not always achieve a coat weight of more than 20 ml/m 2 on one side of the web, wherefore the upper limit of the above-cited range is difficult to reach in two-sided film transfer coating.
  • products can be manufactured having a size weight in a dry product of 4 to 7.5 g/m 2 if the size has a dry matter content of 10 %. Such a product is of considerable strength but requires less energy and a shorter drying apparatus to dry.
  • both applicator rolls are provided with a possibility to use both the pond application and the film transfer method
  • the same coating apparatus can be used for one-sided or two-sided film transferring, one-sided or two-sided pond application and naturally application where one side of the web is treated with a film and the other side is treated by applying size or a similar treating agent thereon by pond application.
  • a film transfer coater can be used to apply coating mix onto the web instead of size, it is also possible to choose a combination where one of the sides of the web is treated with a size mixture in order to obtain increased strength and the other side is treated with a coating mix in order to achieve improved printability.
  • Fig. 3 illustrates an embodiment of the invention where one of the sides of the web is treated twice.
  • the apparatus corresponds to the apparatus of Fig. 1 in other respects except that here the web 3 is arranged to travel round the pond applicator roll 1 and does not depart via the guide roll.
  • a short-dwell applicator 10 is arranged to operate against the web which is supported by the pond applicator roll 1, the short-dwell applicator being used to apply a second layer of treating agent onto the once treated surface of the web 3.
  • This apparatus size is applied to one side of the web using the pond applicator roll 1 and to the other side using the film applicator roll 2.
  • the side of the web 3 which has been treated by means of the film transfer roll 2 is then treated with a short-dwell coater 10.
  • This arrangement is particularly well suited for the manufacture of strong printable boards because the base board web can be treated with a large amount of size and a coating layer is applied directly onto the undried size layer.
  • the adhesive layer applied by means of the film transfer coater has time to set and the water contained therein is sufficiently absorbed by the web when the web travels round the pond applicator roll for the short-dwell coater not to remove all of the size off the web surface by doctoring.
  • the side of the web which is treated by film transfer coating can also be coated twice by the wet-on-wet coating method, if a coating mix is used instead of size during the film transfer step.
  • the invention also covers means for manufacturing a paper or board product, said means being fitted in connection with a paper or board machine as a part of an integrated or a separate apparatus to cooperate with at least one apparatus which treats the web.
  • the means can be arranged as part of an on- or off-line treating unit after a dryer or between dryers, e.g., groups of drying cylinders.
  • the drying apparatus may also comprise a device which guides and simultaneously dries the web without contacting it.
  • the means is arranged in an apparatus which contains a device or devices from the following group: a drying cylinder or cylinder group arranged prior to the means, a drying cylinder or cylinder group arranged prior to the means and a drying cylinder or cylinder group arranged after the means, a non-contact dryer and guide device which at least partly dries the web and is arranged in connection with the means or another web-treating or - producing device arranged to cooperate with the means.
  • the means comprises guide means for bringing the web to a coating arrangement comprising two applicator rolls and for applying coating mix onto both sides of the web, means for guiding the web into the nip between the two applicator rolls, and a film transfer apparatus for applying a treating agent layer onto the web surface by the film transfer method in the nip, and means for simultaneous application of treating agent on the other side of -the web by the pond application method.
  • the above-described means is particularly well suited for an apparatus having a web speed of 300 to 2500 m/min, advantageously 400 to 1000 m/min for a board web and 900 to 2200 m/min for a paper web.
  • the invention also has other embodiments.
  • the method of the invention is best suited for the manufacture of boards, such as liner board, fluting, packing board and drawing board, but it can also be used for treating paper products requiring surface sizing in a corresponding manner.
  • the invention is particularly well suited for products where the properties desired on one side differ from those desirable on the other.
  • the treating method of the invention is extremely well suited for base material webs manufactured partly or totally from recycled fibres, advantageously for base webs containing more than 50 % of recycled fibres or being entirely made from recycled fibres.
  • a guide roll other known means for guiding and supporting the web can be used, such as belts or guides based on the use of air.
  • the size pond is most easily implemented in solutions where the rolls are arranged next to each other at the same height, but in some cases it is feasible to shift the rolls from this position, whereby, however, it is necessary to make sure that a coating pond of sufficient depth can be formed against the web by means of at least one of the rolls.

Landscapes

  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Ce procédé, destiné à traiter notamment du carton, au moyen d'une solution de collage et, le cas échéant, au moyen d'une sauce de couchage, est également conçu pour le traitement du papier et il consiste à diriger, au moyen de dispositifs de guidage (9), une bande continue (3) vers une coucheuse comprenant deux rouleaux applicateurs (1, 2), et à appliquer un agent de traitement sur les deux côtés de cette bande continue. La bande (3) est guidée dans l'écartement formé entre les deux rouleaux applicateurs (1, 2) et, dans cet écartement, une couche d'agent de traitement est appliquée sur l'un de ses côtés, à l'aide d'un processus de transfert pelliculaire, tandis qu'une couche est appliquée simultanément sur son autre côté, au moyen d'un processus de couchage par lame. Ainsi, il est possible d'appliquer une grande quantité d'agent de traitement sur la bande continue et la coucheuse permet un bon passage sur machine de la bande.
PCT/FI1998/000157 1997-02-24 1998-02-20 Procede de traitement de carton ou de papier, dispositif pour mettre en oeuvre ce procede et produit obtenu a l'aide de ces procede et dispositif WO1998037275A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62173/98A AU6217398A (en) 1997-02-24 1998-02-20 Method for treatment of cardboard or paper, an apparatus for carrying out the method and a product by the method and means for producing the product

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI970776A FI102200B1 (fi) 1997-02-24 1997-02-24 Menetelmä kartongin tai paperin käsittelemiseksi, menetelmän toteuttamiseen tarkoitettu sovitelma sekä menetelmällä valmistettu tuote
FI970776 1997-02-24

Publications (1)

Publication Number Publication Date
WO1998037275A1 true WO1998037275A1 (fr) 1998-08-27

Family

ID=8548269

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1998/000157 WO1998037275A1 (fr) 1997-02-24 1998-02-20 Procede de traitement de carton ou de papier, dispositif pour mettre en oeuvre ce procede et produit obtenu a l'aide de ces procede et dispositif

Country Status (6)

Country Link
AT (1) AT3875U1 (fr)
AU (1) AU6217398A (fr)
DE (1) DE29802811U1 (fr)
ES (1) ES1040317Y (fr)
FI (1) FI102200B1 (fr)
WO (1) WO1998037275A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007147949A2 (fr) * 2006-06-21 2007-12-27 Metso Paper, Inc. Procédé et dispositif pour traiter une feuille fibreuse

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009005390U1 (de) 2009-04-08 2009-06-10 Metso Paper, Inc. Vorrichtung zur Behandlung einer Papier- oder Kartonbahn
DE202009016157U1 (de) 2009-11-26 2010-03-04 Metso Paper, Inc. Sprüh- und Teichleimpressvorrichtung für eine Papier- oder Kartonbahn
DE102019103703B4 (de) * 2019-02-14 2021-10-07 Voith Patent Gmbh Vorrichtung und Verfahren zur Beschichtung sowie Computerprogrammprodukt

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085328A (en) * 1980-10-08 1982-04-28 Waertsilae Oy Ab Web coating
US5101760A (en) * 1988-07-27 1992-04-07 J. M. Voith Gmbh Applicator for coating traveling webs and coating process
EP0674047A2 (fr) * 1990-04-19 1995-09-27 Valmet Paper Machinery Inc. Dispositif d'enduction pour l'enduction d'un rouleau de presse d'encollage, papier ou carton

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085328A (en) * 1980-10-08 1982-04-28 Waertsilae Oy Ab Web coating
US5101760A (en) * 1988-07-27 1992-04-07 J. M. Voith Gmbh Applicator for coating traveling webs and coating process
EP0674047A2 (fr) * 1990-04-19 1995-09-27 Valmet Paper Machinery Inc. Dispositif d'enduction pour l'enduction d'un rouleau de presse d'encollage, papier ou carton

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 10, No. 4, (C-32); & JP,A,60 166 062 (OKAZAKI KIKAI KOGYO K.K.) 29 August 1985. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007147949A2 (fr) * 2006-06-21 2007-12-27 Metso Paper, Inc. Procédé et dispositif pour traiter une feuille fibreuse
WO2007147949A3 (fr) * 2006-06-21 2008-02-07 Metso Paper Inc Procédé et dispositif pour traiter une feuille fibreuse

Also Published As

Publication number Publication date
FI102200B (fi) 1998-10-30
AT3875U1 (de) 2000-09-25
FI102200B1 (fi) 1998-10-30
FI970776A0 (fi) 1997-02-24
ES1040317U (es) 1999-04-01
DE29802811U1 (de) 1998-05-20
AU6217398A (en) 1998-09-09
ES1040317Y (es) 1999-08-16

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