EP2000588B1 - Procédé d'application d'une couche double - Google Patents
Procédé d'application d'une couche double Download PDFInfo
- Publication number
- EP2000588B1 EP2000588B1 EP08156066A EP08156066A EP2000588B1 EP 2000588 B1 EP2000588 B1 EP 2000588B1 EP 08156066 A EP08156066 A EP 08156066A EP 08156066 A EP08156066 A EP 08156066A EP 2000588 B1 EP2000588 B1 EP 2000588B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- web
- fibrous web
- top coat
- application
- coat
- 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.)
- Not-in-force
Links
Images
Classifications
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
-
- 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 invention relates to a method for applying a double layer, consisting of primer and top coat, with a liquid to pasty application medium, in particular aqueous pigment suspension on at least one side of a running paper, cardboard or other fibrous web during their production and / or finishing.
- blade coaters In the production or refinement of paper, which had to be treated with a double line, ie primer and top coat, at least the top coat was previously applied with blade coaters (blade coaters). These coaters work with a squeegee element (blade) with which the application medium applied in excess is brought to the desired coating weight and thereby evened out or leveled. These coaters have poor runnability, especially at higher machine and web speeds. In addition, a separate application unit must be provided for each paper page.
- misting also depends heavily on the absorption capacity of the fibrous web. In the case of the top coat this absorption capacity is significantly reduced by the precoat, so that it can come here to a particular extent to Misting. From the EP 1 762 656 A2 It can be seen that pigments with an aspect ratio of 725-120 are used for the base layer. Reference is also made to US 2005/0089660, in which kaolin is provided for a first layer.
- the invention is therefore based on the object of specifying a method which avoids the disadvantages of the prior art.
- the object is achieved according to the characterizing part of claim 1, characterized in that for the applied to the fibrous web double layer, ie precoating and top coat, each one known per se film applicator for applying the coating medium is used in an indirect manner, wherein for the precoat such a coating medium is to be used which contains platelet-shaped pigments. This is the case, for example, with kaolin. It is expedient if the application medium for the precoat has an aspect ratio (i.e., length-to-thickness ratio of a platelet) of> 5, preferably> 15.
- the structure of the precoat can be broken up in such a way that the precoat becomes more open and its absorption capacity increases. As a result, the subsequent top coat applied to the precoat can be better drained. For the first time, it is possible to use high coating weights or application quantities without having to do so unwanted misting comes.
- the pre-painted web has low absorbency.
- the cause is the relatively dense, compact and impermeable precoat, which is used in the form of mostly ground, not too fine calcium carbonate with natural, broad particle size distribution as a pigment, in particular for the achievement of opacity and whiteness is considered. Therefore, especially when applying the top coat, even at low order quantity the dreaded misting occurs.
- the inventive method can be carried out at a high web speed during the production and / or finishing of the fibrous web.
- This web or machine speed can now be more than 1000 m / min, in particular more than 1200 m / min and preferably more than 1300 m / min, whereby the economy of the Process or the web production is particularly high.
- FIG. 1 shows the FIG. 1 in a rough schematic representation of the principle of the method according to the invention.
- FIG. 1 It is shown that a fibrous web 1, which is already predried, is provided with a double layer D.
- a first film applicator 2 to achieve a first coating layer or a precoat 3 and a second Filmhilstswerk 4, which is downstream of the commissioned work 2 in the path L of the fibrous web 1 and the achievement of a second coating layer or a top coat 5 is present.
- the first film applicator 2 consists of two with each other a Nip N1 forming applicator rollers 2.1 and 2.2, each of which a job unit 2.3 and 2.4 is assigned. With the application units 2.3 and 2.4, the application medium M1 is first applied to the surface of the two application rollers and then transferred in the nip N1 at the same time to both web sides 1a and 1b (with simultaneous double-sided coating). That on the web page 1a and web page 1b Applied application medium M1 is shown in dashed lines.
- the second film applicator 4 is identical to the first film applicator 2, which is very advantageous in terms of web guide, spare parts inventory, space requirements, maintenance, installation, etc.
- the application rollers are denoted by 4.1 and 4.2 and the associated application units by 4.3 and 4.4, the nip by N2 and the application medium by M2.
- the top coat 5 is shown by dotted line. This is applied by way of example only on one side of the web page 1a, which is why the application unit was 4.4 swung from the applicator roll 4.1.
- the following pigment composition is chosen in the example: 90 parts of Hydrocarb 60 (calcium carbonate) and 10 parts of Capim NP (kaolin), the kaolin having an aspect ratio (width / thickness ratio) of 20.
- the rest of the coating M1 form latex and thickener.
Claims (6)
- Procédé d'application d'une couche double, composée d'une couche de fond et d'une couche de finition, avec un fluide de dépôt liquide ou pâteux, en particulier une suspension aqueuse de pigments sur au moins une face d'une bande de papier, de carton ou d'une autre matière fibreuse en mouvement lors de sa fabrication et/ou de son traitement, dans lequel on utilise pour la couche de fond (3) un fluide de dépôt (M1), qui contient des pigments en forme de plaquettes, caractérisé en ce que- l'on utilise comme fluide de dépôt (M1) un fluide qui présente un rapport d'élancement (rapport entre longueur et épaisseur des plaquettes) supérieur à 5,- on applique la couche double, donc la couche de fond (3) et la couche de finition (5) respectivement avec un dispositif d'application de film (2, 4), dans lequel on dépose la couche de fond (3) simultanément sur les deux faces (1a, 1b) de la bande et on déplace la bande de matière fibreuse (1), lors du dépôt de la couche double, avec une vitesse de plus de 1000 m/min à travers une machine utilisée pour la fabrication et/ou le traitement de la bande de matière fibreuse.
- Procédé selon la revendication 1, caractérisé en ce que l'on utilise comme fluide de dépôt (M1) un fluide qui présente un rapport d'élancement supérieur à 15.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on dépose pour la couche de finition (5) un fluide de dépôt (M2) à raison de 6 g/m2 ou plus, en particulier > 8 g/m2, de préférence > 10 g/m2.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on déplace la bande de matière fibreuse (1), lors du dépôt de la couche double (D), avec une vitesse de plus de 1200 m/min, de préférence de plus de 1300 m/min, à travers une machine utilisée pour la fabrication et/ou le traitement de la bande de matière fibreuse.
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'on applique la couche de finition (5) simultanément sur les deux faces (1a, 1b) de la bande.
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'on n'applique la couche de finition (5) que sur une des deux faces de la bande.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007026617A DE102007026617A1 (de) | 2007-06-08 | 2007-06-08 | Verfahren zum Aufbringen einer Doppelschicht |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2000588A1 EP2000588A1 (fr) | 2008-12-10 |
EP2000588B1 true EP2000588B1 (fr) | 2012-01-11 |
Family
ID=39832441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08156066A Not-in-force EP2000588B1 (fr) | 2007-06-08 | 2008-05-13 | Procédé d'application d'une couche double |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2000588B1 (fr) |
AT (1) | ATE541090T1 (fr) |
DE (1) | DE102007026617A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202008016817U1 (de) | 2008-12-19 | 2009-02-26 | Voith Patent Gmbh | Beschichtungsvorrichtung |
CN105121743B (zh) * | 2013-04-05 | 2017-09-26 | 福伊特专利有限公司 | 薄膜压榨 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5981011A (en) * | 1992-01-22 | 1999-11-09 | A*Ware Technologies, L.C. | Coated sheet material |
FI980086A (fi) * | 1997-05-28 | 1998-11-29 | Enso Oyj | Päällystetty kartonki, sen valmistusmenetelmä sekä siitä muodostetut astiat ja pakkaukset |
DE10007484C2 (de) * | 2000-02-18 | 2001-12-13 | Schoeller Felix Jun Foto | Schichtträger für Aufzeichnungsmaterialien |
KR101057341B1 (ko) * | 2003-04-24 | 2011-08-17 | 오지 세이시 가부시키가이샤 | 인쇄용 도피지 |
JP4268486B2 (ja) * | 2003-09-19 | 2009-05-27 | 大日本印刷株式会社 | コート紙 |
EP1522629A1 (fr) * | 2003-10-08 | 2005-04-13 | M-real Oyj | Papier couche d'imprimierie |
US7261928B2 (en) * | 2003-10-28 | 2007-08-28 | Potlatch Corporation | Package coating, processes of making, and packaging systems |
GB0421685D0 (en) * | 2004-09-30 | 2004-11-03 | Arjo Wiggins Fine Papers Ltd | Multi-layer coating products and curtain coating process for same |
KR20070028249A (ko) * | 2005-09-07 | 2007-03-12 | 오지 세이시 가부시키가이샤 | 도공지 |
-
2007
- 2007-06-08 DE DE102007026617A patent/DE102007026617A1/de not_active Withdrawn
-
2008
- 2008-05-13 EP EP08156066A patent/EP2000588B1/fr not_active Not-in-force
- 2008-05-13 AT AT08156066T patent/ATE541090T1/de active
Also Published As
Publication number | Publication date |
---|---|
DE102007026617A1 (de) | 2008-12-11 |
EP2000588A1 (fr) | 2008-12-10 |
ATE541090T1 (de) | 2012-01-15 |
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