EP1130460B1 - Verfahren zur Herstellung polymerlaminierter Papierträger und durch dieses Verfahren hergestellte polymerlaminierte photographische Papierträger - Google Patents

Verfahren zur Herstellung polymerlaminierter Papierträger und durch dieses Verfahren hergestellte polymerlaminierte photographische Papierträger Download PDF

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Publication number
EP1130460B1
EP1130460B1 EP20010200764 EP01200764A EP1130460B1 EP 1130460 B1 EP1130460 B1 EP 1130460B1 EP 20010200764 EP20010200764 EP 20010200764 EP 01200764 A EP01200764 A EP 01200764A EP 1130460 B1 EP1130460 B1 EP 1130460B1
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EP
European Patent Office
Prior art keywords
base paper
polymer
process according
coating
extrusion
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Expired - Lifetime
Application number
EP20010200764
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English (en)
French (fr)
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EP1130460A1 (de
Inventor
Jan Bastiaan Bouwstra
Ieke De Vries
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Fujifilm Manufacturing Europe BV
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Fujifilm Manufacturing Europe BV
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Priority to EP20010200764 priority Critical patent/EP1130460B1/de
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/775—Photosensitive materials characterised by the base or auxiliary layers the base being of paper
    • G03C1/79—Macromolecular coatings or impregnations therefor, e.g. varnishes
    • 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
    • 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
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper

Definitions

  • the invention is directed to the preparation of polymer laminated base paper and more in particular to the preparation of polymer laminated photographic base paper.
  • Polymer laminated base paper for photographic printing paper is conventionally prepared from a base paper that is laminated with at least one polymer resin layer, usually a titanium dioxide filled polyethylene, polypropylene or a polymethylene-methacrylate resin, by extrusion-coating (or co-extrusion-coating) of a polymer melt onto the surface of the base paper.
  • a polymer resin layer usually a titanium dioxide filled polyethylene, polypropylene or a polymethylene-methacrylate resin
  • EP-A-0 704 753 describes pretreatment of a paper base with corona discharge treatment and flame treatment.
  • JP-A 57-102622 a process is described for the extrusion-coating of a base paper with polyethylene, in which process the base paper is subjected to a corona treatment, followed by heating to a temperature of at least 80°C. This process aims at improving the adhesion between base paper and polymer coating.
  • photographic base paper Further important aspects of photographic base paper are the speed of production and the thickness of the polymer layers. Both aspects are important in view of the economy of the process of producing photographic print paper. The formation of pits has turned out to be strongly dependent on those aspects.
  • the present invention is based thereon, that the coated paper shows less pits in case the base paper web is heated, preferably by infrared radiation, prior to the extrusion-coating with the polymer resin.
  • the present invention is directed to a process for the preparation of polymer laminated base paper, said process comprising laminating a base paper web on at least one side thereof with at least one polymer layer, by extrusion-coating at a coating speed of 300 m/min or more, wherein the said base paper web is heated prior to laminating.
  • the present invention resides therein that the paper web is heated just prior to the (co-)extrusion-coating.
  • This heating can be done by the application of heated air, heated rollers and/or by radiation. More in particular, preference is given to the use of radiation in the Near Infra Red (NIR) region.
  • NIR radiation can be emitted at radiation temperatures of over 2500 K, preferably over 2900 K, most preferred over 3000 K. Generally, the upper limit for the emission temperature is 3500 K.
  • the temperature of the paper is preferably raised to a value of at least 30°C, preferably to a value between 30 and 125°C. More in particular the upper limit of the temperature of the web is 90°C. In case energy consumption is a consideration, the temperature may be kept at a value of less than 80°C without negative effects.
  • the extrusion-coating can be done with one layer of polymer or with a combination of polymer layers by co-extrusion.
  • the paper web can be coated on one side or on both sides, the latter embodiment having preference.
  • the polymers to be used for the extrusion-coating are the conventional polymers used in paper coating, more in particular in the preparation of photographic base paper. Examples are polyolefins, polyacrylates or polyesters. More in particular, the coating is done using low-density polyethylene, high density polyethylene and blends thereof.
  • the amount of polymer coating depends on the required properties of the laminated base paper, such as stiffness, gloss, number of pits and the like. More in particular the amount is preferably not more than 50 g/m 2 , more preferably between 25 and 50 g/m 2 .
  • the heating step can be incorporated in an extrusion-coating line for paper. It is to be noted that in case of the use of more than one layer of polymer resin it is possible to use co-extrusion.
  • co-extrusion is therefor intended to include also co-extrusion.
  • the invention is now elucidated on the basis of the attached figure.
  • an extrusion-coating line has been shown.
  • the base-paper web is fed, via a number of rollers, past a corona treatment, via the nip-roll to the nip-zone.
  • the polymer melt and the base paper web come together in the nip.
  • the polymer melt is then cooled on the chill-roll and is released from the chill-roll at the release-roll, from where it is transported further.
  • NIR radiation equipment is installed between the corona treatment and the nip-roll.
  • the infra-red radiation is provided from one side and a radiation mirror is provided on the other side. It is also possible to install the NIR-radiation equipment before the corona treatment.
  • the present figure shows lamination on only one side of the paper web.
  • the partly laminated paper web can be laminated on the other side in a comparable co-extrusion line. It is also possible to include a second extruder and, if necessary, suitable radiation equipment in this line.
  • Paper substrates were used for testing. These substrates, or base papers, represent a range of base paper qualities as can be found in the market. Paper substrate '1' represents a good quality in relation to the number of pits. Paper substrate '2' represents a lower quality.
  • the web width of the substrates was 47 cm.
  • the substrates were first extrusion coated with 21.0 g/m2 transparent polyolefin resin film on the backside at a line speed of 200 m/min.
  • the substrate Before extrusion-coating of the topside, the substrate was pretreated with corona and subsequently preheated with NIR radiation up to a temperature of 39°C or 83°C.
  • the treating width of the NIR-equipment covered 24 cm in the centre of the total web width of 47 cm.
  • two NIR-units were used.
  • the substrate After the online pretreatments (Corona and preheating) the substrate was extrusion coated at the topside with a polyolefin resin LDPE of 28 g/m2 (containing metaloxide, dyes, coloured pigments, optical brighteners and the like) at a speed of 400 m/min.
  • the hotmelt (temperature 326°C) was nipped (pressure 6 bar) between the substrate and a cooling chill-roll. Because of the NIR-pretreatment the crater like defects or so-called pits defects decreased in comparison to the samples which received no heat pretreatment (remaining at room temperature). The NIR-pretreatment shows no disadvantage in the number of releasing defects, when the extrusion coated web releases from the cooling chill-roll.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)

Claims (13)

  1. Verfahren zur Herstellung von polymerlaminierten Rohpapier (base paper), wobei das Verfahren das Laminieren einer Rohpapierbahn auf wenigstens einer Seite dieser mit wenigstens einer Polymerschicht durch Extrusionsbeschichtung mit einer Beschichtungsgeschwindigkeit von 300 m/Min. oder mehr umfasst, wobei die Rohpapierbahn vor dem Laminieren erwärmt wird, wobei die Erwärmung unter Verwendung einer nahen Infrarotstrahlung durchgeführt wird.
  2. Verfahren nach Anspruch 1, wobei die Beschichtungsgeschwindigkeit wenigstens 350, vorzugsweise wenigstens 400 m/Min, und insbesondere nicht mehr als 700 m/Min. beträgt.
  3. Verfahren nach Anspruch 1 oder 2, wobei die Infrarotstrahlung bei Temperaturen von über 2.500 K emittiert wird.
  4. Verfahren nach den Ansprüchen 1 - 3, wobei die Rohpapierbahn auf beiden Seiten extrusionsbeschichtet wird.
  5. Verfahren nach den Ansprüchen 1 - 4, wobei das Polymer ein Polyolefin, ein Polyacrylat oder ein Polyester ist.
  6. Verfahren nach den Ansprüchen 1 - 5, wobei die Rohpapierbahn auf eine Temperatur von zwischen 30 bis 125 °C vorgewärmt wird.
  7. Verfahren nach Anspruch 6, wobei die Temperatur nicht mehr als 90 °C beträgt.
  8. Verfahren nach den Ansprüchen 1 - 7, wobei die Rohpapierbahn vor der Extrusionsbeschichtung einer oder mehreren zusätzlichen anderen Behandlungen unterworfen wird.
  9. Verfahren nach Anspruch 8, wobei diese andere Behandlung wenigstens eine aus einer Koronabehandlung, einer Ozonbehandlung, einer Flammenbehandlung und einer Plasmabehandlung umfasst.
  10. Verfahren nach den Ansprüchen 1 - 9, wobei das laminierte Rohpapier ein polymerlaminiertes fotografisches Rohpapier ist.
  11. Verfahren nach Anspruch 10, wobei das polymerlaminierte fotografische Rohpapier mit wenigstens einer Schicht einer fotografischen Emulsion versehen wird.
  12. Verfahren nach Anspruch 11, wobei das polymerlaminierte fotografische Rohpapier mit wenigstens einer Schicht aus einer Gelatineunterschicht zwischen der Polymerschicht und der fotografischen Emulsion versehen wird.
  13. Polymerlaminiertes fotografisches Rohpapier oder Druckpapier umfassend eine Rohpapierbahn, auf wenigstens einer Seite dieser eine Polymerbeschichtung in einer Menge von zwischen 25 und 50 g/m2, wobei das laminierte Papier durch das Verfahren der Ansprüche 10 -12 erhaltbar ist.
EP20010200764 2000-03-03 2001-03-01 Verfahren zur Herstellung polymerlaminierter Papierträger und durch dieses Verfahren hergestellte polymerlaminierte photographische Papierträger Expired - Lifetime EP1130460B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20010200764 EP1130460B1 (de) 2000-03-03 2001-03-01 Verfahren zur Herstellung polymerlaminierter Papierträger und durch dieses Verfahren hergestellte polymerlaminierte photographische Papierträger

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP00200764 2000-03-03
EP00200764 2000-03-03
EP20010200764 EP1130460B1 (de) 2000-03-03 2001-03-01 Verfahren zur Herstellung polymerlaminierter Papierträger und durch dieses Verfahren hergestellte polymerlaminierte photographische Papierträger

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EP1130460A1 EP1130460A1 (de) 2001-09-05
EP1130460B1 true EP1130460B1 (de) 2007-06-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105856823A (zh) * 2016-04-01 2016-08-17 新维畅想数字科技（北京）有限公司 一种凹凸打印装置及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115652B (fi) * 2000-06-29 2005-06-15 Metso Paper Inc Menetelmä ja sovitelma liikkuvan rainan päällystämiseksi edullisesti kuivalla käsittelyaineella
EP1186952A1 (de) * 2000-09-06 2002-03-13 Fuji Photo Film B.V. Verfahren zur Beschichtung einer laufenden Bahn

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57102622A (en) * 1980-12-18 1982-06-25 Mitsubishi Paper Mills Ltd Manufacture of photographic suporting material
US5182161A (en) * 1990-07-10 1993-01-26 Mitsubishi Paper Mills Limited Support for photosensitive materials
DE4219194C1 (de) * 1992-06-12 1993-12-16 Schoeller Felix Jun Papier Verfahren zur Herstellung eines Schichtträgermaterials für fotografische Aufzeichnungsmaterialien
US5503968A (en) * 1994-09-27 1996-04-02 Eastman Kodak Company Flame treatment and corona discharge treatment of photographic paper for improved bond with ozone treated polyolefin resin coating
EP0952483B1 (de) * 1998-04-23 2002-07-24 Fuji Photo Film B.V. Beschichtetes Trägerpapier für photographische Abzüge
DE19821446A1 (de) * 1998-05-13 1999-11-18 Voith Sulzer Papiertech Patent Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton, und Maschine zur Papier- oder Kartonherstellung
US6030742A (en) * 1998-11-23 2000-02-29 Eastman Kodak Company Superior photographic elements including biaxially oriented polyolefin sheets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105856823A (zh) * 2016-04-01 2016-08-17 新维畅想数字科技（北京）有限公司 一种凹凸打印装置及方法
CN105856823B (zh) * 2016-04-01 2018-07-03 新维畅想数字科技（北京）有限公司 一种凹凸打印装置及方法

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