EP1095187B1 - Verfahren und vorrichtung zur verbesserung einer strichoberfläche von papierbahnen - Google Patents
Verfahren und vorrichtung zur verbesserung einer strichoberfläche von papierbahnen Download PDFInfo
- Publication number
- EP1095187B1 EP1095187B1 EP99932773A EP99932773A EP1095187B1 EP 1095187 B1 EP1095187 B1 EP 1095187B1 EP 99932773 A EP99932773 A EP 99932773A EP 99932773 A EP99932773 A EP 99932773A EP 1095187 B1 EP1095187 B1 EP 1095187B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- web
- coating
- film press
- coating material
- 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
- 238000000576 coating method Methods 0.000 title claims abstract description 83
- 239000011248 coating agent Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- 125000000129 anionic group Chemical group 0.000 abstract description 8
- 239000000123 paper Substances 0.000 description 61
- 230000000694 effects Effects 0.000 description 7
- 125000002091 cationic group Chemical group 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 208000028659 discharge Diseases 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- -1 brush Substances 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- 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
- D21H23/30—Pretreatment of the paper
Definitions
- the paper webs are marked with a watery coating slip, also called coating color, spread.
- the coating colors consist of one or a mixture of different ones inorganic pigments and are made with one or a mixture of organic binders. It is known, these coating colors with so-called film presses on the Transfer paper webs. The coating color is on or applied to a rubber roller on both sides and then transferred from this roller or these rollers to the paper web. At the end of the contact with the coating slip Paper web cleavage occurs in the coating slip film. With this separation of a more or less viscous coating slip in itself, known rheological problems occur on the so-called flow lines or the orange peel effect to lead.
- FR-A-1 447 984 describes a method for improving the Adhesion of a polyolefin film on a paper web known to to improve adhesion, the paper web with a high-frequency corona discharge is treated.
- Such Corona discharge device is not suitable for the orange peel effect and the spray when coating base paper to improve with an aqueous coating slip in film presses.
- From US-A-4,576,831 is also a method for treatment a paper web with a high-frequency corona discharge known with which the adhesion of the coating slip improved shall be.
- a film press there is no need to improve the adhesion, since this is already done by the pressure effect of the film press rollers.
- US Pat. No. 3,498,865 describes the application of a polyfin layer known on a raw paper web, in which in a contact zone the melted polyfin in a limited electrical field is applied. Such a device is not suitable an aqueous coating slip with high throughput speeds apply evenly to a raw paper web.
- the invention is therefore based on the object, the coating surface to improve the paper webs produced and to minimize the spray.
- the invention has the advantage that with this method aqueous coating slip a more closed surface of the Dashes and therefore improved printability of the paper is achievable. Furthermore, one achieves with the inventive Process a printability that was previously only possible with thicker ones Stroke orders were possible, so that printed products can be produced with a lower mass per unit area are. Because these watery applied to film presses Coating compounds allow thinner strokes to be made with them Printed matter advantageously also more environmentally friendly dispose.
- FIG. 1 of the drawing shows a schematic film press, through which the paper web 8 runs and on one side with an aqueous coating slip is provided, the counter roller 1 positive by an electric charging device ionized and therefore attractive for the anionic coating slip becomes.
- the film press consists of two film press rollers, the the lower one represents the application roller 3 and the upper one the counter roller 1, which are both provided with a rubber covering.
- the rollers 1, 3 are driven in opposite directions and transported between its contact surfaces, the paper web 8 in a predetermined Direction.
- the application roller 3 of the film press is with a Pre-coating device 4, through which the coating slip is applied to the application roller 3.
- the coating slip becomes even, for example, with a known squeegee applied to the surface of the application roller 3 and taken in the direction of rotation as film 6 on the roller 3 and on the lower side 2 of the paper web 8 passing through it. Since the two rollers 1, 3 against each other under a predetermined pressure run, the aqueous coating slip is partially dewatered, so that a certain layer of the coating slip on the lower paper web side 2 is applied.
- the pre-coating device 4 which optimally distributes the coating slip an electrode (cathode) 5 and is with the dispersed coating slip, which as electrokinetic System can be considered in electrical contact.
- the negative pole is a voltage source 9 with this Electrode 5 connected.
- On the counter roller 1 is a co-rotating Metal roller 7 arranged as a second electrode (anode) acts and connected to the positive pole of the DC voltage source 9 is.
- the rubber covering of the upper film press roller 1 is made made of an electrically conductive rubber mixture, so that the Paper 8 is charged with a positive electrical charge becomes.
- the electrodes 5, 7 and the voltage source 9, as well as an electrically conductive roller coverings Charging device electrical charging, a DC voltage source 9 is selected, which provides a voltage of approximately 150 to 2,000 V. With others Embodiments can also handle higher voltages 10,000 V can be used.
- Fig. 2 of the drawing shows schematically a film press for coating a paper web on both sides. This is what it is about essentially a film press as shown in FIG Drawing described with various additional devices is provided in order to enable a double-sided coating. The same parts are therefore also with the provided with the same reference numerals as in Fig. 1 of the drawing.
- two film press rolls 1, 3 are shown, which are both designed as application rollers and through their contact surfaces, the paper web 8 continuously passes.
- the Paper web 8 wetted on both sides with coating slip.
- This is on a pre-coating device 4, 4a is provided for each application roller 1, 3, by the help of a known, not shown Doctor device on the surface of the application rollers 3, 1 evenly spread the coating slip.
- This creates a film 6, 6a of coating slip on the roller surfaces, the partially on both sides 2, 2a of the passing Paper web 8 is applied.
- the two pre-coating devices 4, 4a connected to a DC voltage source 9.
- the pre-coating devices 4, 4a electrodes (cathodes) represents that with the disperse coating slip that acts as an electrokinetic System can be viewed in electrical Are in contact.
- two guide rollers 7a, 7b are provided whose contact surfaces the paper web 8 runs and the application rollers 1, 3 is supplied.
- These guide rollers exist made of electrically conductive material or are with an electrical conductive surface material coated. Stand there at least these conductive roller surfaces with the DC voltage source 9 and represent the opposite Electrode (anode). In this way, the continuous Paper web 8 with a positive electrical charge charged.
- a film press is shown schematically, through which a two-sided order on the paper web 23 is reached. They are used as an electrical charging device two spray electrodes (corona generators) 13, 17 are provided, the opposite charge of the paper web 23 opposite of the coating slip.
- the paper web 23 is one Deflection roller 16 transported to a first guide roller 15. This guide roller 15 is connected to a compression spring 14 which the paper web 23 close to the right-hand corona generator 17 passes. This will make the right paper web surface provided with an electrical charge. This will make the paper contrary to the coating mass ionized by the upper Atomic position of the paper web 23 is oxidized. This corona oxidation leads to hydrophilization and thus to faster water absorption. With sufficient voltage can also be reactive on the cellulose fiber wall Groups are formed that improve the line character.
- corona generator 17 Above the right-hand corona generator 17 is a left-hand one Corona generator 13 with compression spring provided 19 guide roller 18 provided the oxidation of the left paper web surface causes.
- the paper web 23 runs through two oppositely driven Film press rollers 20, 12. Horizontal next to these Film press rollers 20, 12 is still another metering roller 11, 21 arranged, which are also counter to the respective Film press roller 12, 20 is driven.
- the metering roller 11, 21 has a textured surface that uniform wetting of the film press roller 12, 20 with the Spreadable serves.
- the coating slip is entered and over the surface of the Film press roller 11, 21 on the two paper side surfaces of the continuous paper web 23 applied.
- the aqueous coating slips provide an electrokinetic System, with each pigment having a zeta potential in it owns aqueous system.
- the coating slips are dispersed, because these pigments have electrokinetic repulsive forces feature.
- the invention was therefore based on the knowledge of this electrokinetic Forces in splitting the coating slip film to use and thus improve the transfer to paper 8, 23. Since all common coating colors are anionic and should also be transferred to anionic paper, the electrokinetic repulsive forces had to be overcome for this to achieve a more homogeneous stroke application. Therefore, the method according to the invention is a transfer device, by which the ionogenicity is influenced in such a way that the electrokinetic repulsive forces between the paper 8, 23 and the pigments of the coating slip and thus the coating slip be picked up yourself.
- the coating slip can both cationic and the paper anionic or vice versa.
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Paper (AREA)
Description
- Fig. 1:
- eine schematische Darstellung einer einseitig auftragenden Filmpresse mit einer elektrischen Ladungsvorrichtung;
- Fig. 2:
- eine schematische Darstellung einer zweiseitig aufragenden Filmpresse mit einer elektrischen Ladungsvorrichtung, und
- Fig. 3:
- eine schematische Darstellung einer zweiseitig auftragenden Filmpresse mit einem Koronagenerator für jede Seite als Ladungsvorrichtung.
Claims (8)
- Verfahren zur Verbesserung der Strichoberfläche, der auf einer Rohpapierbahn (8, 23) mit Hilfe einer Papierstreichvorrichtung aufgetragenen wäßrigen Streichmasse, die zusätzlich eine Ladungsvorrichtung enthält, mit der die Rohpapierbahn beeinfluß wird, dadurch gekennzeichnet, daß die Rohpapierbahn (8, 23) durch zwei gegensinnig rotierende Filmpreßwalzen (1, 3; 12, 20) einer Papierstreichvorrichtung läuft, wobei die wäßrige Streichmasse mittels mindestens einer Filmpreßwalze (1, 3; 12, 20) auf die Rohpapierbahn (8, 23) übertragen wird, wobei die Ladungsvorrichtung die Streichmasse und das Papier gegensinnig ionisiert.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Papierbahn (8) mit Hilfe einer Elektrode (7, 7a, 7b) ionisiert wird, die mit einem Pol einer Gleichspannungsquelle (9) verbunden ist, wobei der andere Pol der Gleichspannungsquelle (9) mit der Streichmasse in Verbindung steht.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Papierbahn (23) mittels mindestens einer Streuelektrode (13, 17) (Koronagenerator) ionisiert wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rohpapierbahn (8, 23) mit einer Geschwindigkeit von 800 bis 2.000 m/min durch die Filmpresse (1, 3; 12, 20) gestrichen wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die wäßrige Streichmasse durch die beiden gegensinnig laufenden Filmpreßwalzen (1, 3; 12, 20) teilweise entwässert wird, wodurch eine dünne vorbestimmte gleichmäßige Schicht der Streichmasse auf die Rohpapierbahn (8, 23) aufgetragen wird.
- Vorrichtung zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zum Bestreichen der Rohpapierbahn (8, 23) mit der wäßrigen Streichmasse eine Filmpresse vorgesehen ist, die mindestens zwei Filmpreßwalzen (1, 3; 12, 20) enthält und daß zur Ionisierung des Rohpapiers (8, 23) eine elektrische Ladungsvorrichtung vorgesehen ist.
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Ladungsvorrichtung aus einer Anode (7, 7a, 7b) und einer Kathode (5, 5a) besteht, die mit einer Gleichspannungsquelle (9) verbunden sind, wobei jeweils eine Elektrode (5, 7, 7a, 7b) mit der Rohpapierbahn (8) und der Streichmasse elektrisch in Verbindung stehen.
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Ladungsvorrichtung mindestens eine Sprühelektrode (Koronagenerator) (13, 17) enthält, die in der Nähe der Papierbahn (23) angeordnet ist und zur Ionisation wenigstens einer Papieroberfläche dient.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19829490A DE19829490A1 (de) | 1998-07-01 | 1998-07-01 | Verfahren und Vorrichtung zur Verbesserung einer Strichoberfläche von Papierbahnen |
| DE19829490 | 1998-07-01 | ||
| PCT/EP1999/004544 WO2000001887A1 (de) | 1998-07-01 | 1999-07-01 | Verfahren und vorrichtung zur verbesserung einer strichoberfläche von papierbahnen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1095187A1 EP1095187A1 (de) | 2001-05-02 |
| EP1095187B1 true EP1095187B1 (de) | 2003-09-17 |
Family
ID=7872696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99932773A Expired - Lifetime EP1095187B1 (de) | 1998-07-01 | 1999-07-01 | Verfahren und vorrichtung zur verbesserung einer strichoberfläche von papierbahnen |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6521299B1 (de) |
| EP (1) | EP1095187B1 (de) |
| JP (1) | JP2002519540A (de) |
| AT (1) | ATE250164T1 (de) |
| DE (2) | DE19829490A1 (de) |
| ES (1) | ES2207250T3 (de) |
| WO (1) | WO2000001887A1 (de) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE40722E1 (en) * | 2002-09-27 | 2009-06-09 | Surmodics, Inc. | Method and apparatus for coating of substrates |
| US7125577B2 (en) * | 2002-09-27 | 2006-10-24 | Surmodics, Inc | Method and apparatus for coating of substrates |
| DE10342313A1 (de) * | 2003-09-12 | 2005-04-07 | Voith Paper Patent Gmbh | Auftragsvorrichtung |
| WO2008108391A1 (ja) * | 2007-03-05 | 2008-09-12 | Nippon Paper Industries Co., Ltd. | 印刷用塗工紙 |
| DE102007036420A1 (de) * | 2007-08-02 | 2009-02-05 | Voith Patent Gmbh | Vorrichtung zur Herstellung und/oder Behandlung einer Materialbahn |
| US9364349B2 (en) | 2008-04-24 | 2016-06-14 | Surmodics, Inc. | Coating application system with shaped mandrel |
| JP2010236164A (ja) * | 2009-03-31 | 2010-10-21 | Nippon Paper Industries Co Ltd | グラビア印刷用塗工紙 |
| US9827401B2 (en) | 2012-06-01 | 2017-11-28 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
| MX351261B (es) | 2012-06-01 | 2017-10-06 | Surmodics Inc | Aparato y método para recubrir catéteres con globo. |
| US11090468B2 (en) | 2012-10-25 | 2021-08-17 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
| US9283350B2 (en) | 2012-12-07 | 2016-03-15 | Surmodics, Inc. | Coating apparatus and methods |
| WO2020112816A1 (en) | 2018-11-29 | 2020-06-04 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
| US11819590B2 (en) | 2019-05-13 | 2023-11-21 | Surmodics, Inc. | Apparatus and methods for coating medical devices |
| US12496612B2 (en) | 2021-01-08 | 2025-12-16 | Surmodics, Inc. | Coating application system and methods for coating rotatable medical devices |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1447984A (fr) * | 1964-11-20 | 1966-08-05 | Nat Distillers Chem Corp | Procédé pour accroître l'adhérence de revêtements en polyoléfines sur les substrats |
| US3498865A (en) * | 1967-03-27 | 1970-03-03 | Int Paper Co | Method of coating paper |
| US3952700A (en) * | 1970-11-09 | 1976-04-27 | Xerox Corporation | Liquid applicator |
| US3783826A (en) * | 1971-08-20 | 1974-01-08 | Xerox Corp | Ion film regulating device |
| US4088093A (en) * | 1976-04-13 | 1978-05-09 | Continental Can Company, Inc. | Web coating and powder feed |
| DE2715766B2 (de) * | 1977-04-07 | 1980-01-03 | Eichler, Helmut, 7601 Durbach | Verfahren und Vorrichtung zur elektrostatischen Unterstützung des Druckvorgangs |
| US4457256A (en) * | 1981-01-05 | 1984-07-03 | Polaroid Corporation | Precharged web coating apparatus |
| JPS5935985A (ja) * | 1982-08-23 | 1984-02-27 | Fuji Photo Film Co Ltd | 感熱記録紙の製造方法 |
| DE3235368A1 (de) * | 1982-09-24 | 1984-03-29 | Basf Ag, 6700 Ludwigshafen | Verfahren zum streichen von papier und karton |
| AT383380B (de) * | 1985-10-31 | 1987-06-25 | Heinz Mag Bartelmuss | Einrichtung zum abfuehren von elektrischen ladungen aus einem vlies aus breiigem material |
| DE3623738A1 (de) * | 1986-07-14 | 1988-01-21 | Ralf Knobel | Verfahren und einrichtung zum stellenweisen, vorzugsweise punktuellen beschichten bzw. bedrucken von textilen warenbahnen |
| US5062764A (en) * | 1990-01-08 | 1991-11-05 | Robert A. Foisie | Method and apparatus using electrostatic charges to stabilize the upper sheets of a stack of paper |
| JPH0465088A (ja) * | 1990-07-03 | 1992-03-02 | Fuji Photo Film Co Ltd | ウエブ帯電用装置 |
| DE69224881T2 (de) * | 1991-11-06 | 1998-08-27 | Konishiroku Photo Ind | Extrusionsartige Beschichtungsvorrichtung und Beschichtungsmethode |
| DE4324337C2 (de) * | 1993-07-20 | 1998-08-13 | Thomas E Fausel | Wiederbefeuchtungseinrichtung für eine bedruckte Papierbahn |
| DE19632899A1 (de) * | 1996-08-16 | 1998-02-19 | Weitmann & Konrad Fa | Vorrichtung zum Bestäuben bewegter Gegenstände, insbesondere bedruckter Papierbögen |
-
1998
- 1998-07-01 DE DE19829490A patent/DE19829490A1/de not_active Withdrawn
-
1999
- 1999-07-01 DE DE59907029T patent/DE59907029D1/de not_active Expired - Fee Related
- 1999-07-01 JP JP2000558270A patent/JP2002519540A/ja not_active Withdrawn
- 1999-07-01 AT AT99932773T patent/ATE250164T1/de not_active IP Right Cessation
- 1999-07-01 WO PCT/EP1999/004544 patent/WO2000001887A1/de not_active Ceased
- 1999-07-01 US US09/743,006 patent/US6521299B1/en not_active Expired - Fee Related
- 1999-07-01 EP EP99932773A patent/EP1095187B1/de not_active Expired - Lifetime
- 1999-07-01 ES ES99932773T patent/ES2207250T3/es not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002519540A (ja) | 2002-07-02 |
| WO2000001887A1 (de) | 2000-01-13 |
| DE59907029D1 (de) | 2003-10-23 |
| EP1095187A1 (de) | 2001-05-02 |
| DE19829490A1 (de) | 2000-01-05 |
| ES2207250T3 (es) | 2004-05-16 |
| US6521299B1 (en) | 2003-02-18 |
| ATE250164T1 (de) | 2003-10-15 |
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