EP0259548B1 - Photographic-paper support with a water-resistant polyolefinic coating - Google Patents

Photographic-paper support with a water-resistant polyolefinic coating Download PDF

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Publication number
EP0259548B1
EP0259548B1 EP87108526A EP87108526A EP0259548B1 EP 0259548 B1 EP0259548 B1 EP 0259548B1 EP 87108526 A EP87108526 A EP 87108526A EP 87108526 A EP87108526 A EP 87108526A EP 0259548 B1 EP0259548 B1 EP 0259548B1
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EP
European Patent Office
Prior art keywords
polyethylene
density
photographic
paper support
water
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Expired - Lifetime
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EP87108526A
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German (de)
French (fr)
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EP0259548A1 (en
Inventor
Ralf-Burkhard Dr.Dipl.-Chem. Dethlefs
Bernd Dipl.-Ing. Scholz
Wolfram Chem.-Ing. Wysk
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Felix Schoeller Jr Foto und Spezialpapiere GmbH
Felex Schoeller Jr and GmbH and Co KG
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Felix Schoeller Jr Foto und Spezialpapiere GmbH
Felex Schoeller Jr and GmbH and Co KG
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Priority to AT87108526T priority Critical patent/ATE56544T1/en
Publication of EP0259548A1 publication Critical patent/EP0259548A1/en
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Classifications

    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/22—Polyalkenes, e.g. polystyrene
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/151—Matting or other surface reflectivity altering material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer

Definitions

  • the invention relates to a photographic paper support with a waterproof coating made of a polyolefin.
  • Waterproof photographic papers consist of a base paper with synthetic resin coatings applied on both sides, which are either made of polyolefins, e.g. B. made of polyethylene, and are applied to the paper by means of extrusion coating or from organic lacquer mixture which are applied to the paper by means of dipping or spraying and dried and solidified by means of heat or high-energy radiation.
  • synthetic resin coatings applied on both sides, which are either made of polyolefins, e.g. B. made of polyethylene, and are applied to the paper by means of extrusion coating or from organic lacquer mixture which are applied to the paper by means of dipping or spraying and dried and solidified by means of heat or high-energy radiation.
  • One or more photosensitive coatings based on silver halide are then applied to one of the synthetic resin layers.
  • the light-sensitive layers can be black and white as well as color photographic layers.
  • the synthetic resin film (front coating) arranged under the light-sensitive layers usually contains light-reflecting white pigment and, if appropriate, color pigments, optical brighteners and / or other additives, such as antistatic agents, dispersants for the white pigment, antioxidants, release agents and the like.
  • the synthetic resin film (backside coating) arranged on the paper side opposite the photosensitive layers can be pigmented or unpigmented and / or contain other additives which result from the respective use of the laminate as a photographic support and which can in principle correspond to those of the front side coating.
  • the front coating can also contain additional functional layers which, for example, improve the adhesion of the light-sensitive layers.
  • the backside coating can also be provided with further functional layers which improve, for example, the writeability, antistatic properties, sliding properties, flatness.
  • HDPE higher density polyethylene
  • HDPE high-molecular-weight portions of polyethylene and the auxiliary agents added for stabilization.
  • HDPE can also not be pulled out at the required machine speeds on layer thicknesses of 10 - 50 11m without leaving defects and holes in the molten film.
  • Secondary disturbances due to increased extruder temperatures are dark colored particles, which result from degraded, decomposed or burned polyethylene, while agglomerates, also called gel bodies or specks, lead to disturbances when pouring light-sensitive silver halide emulsions, which in the developed image reduce, change or completely missing places Give black or color density.
  • Stabilizers in polyethylene can influence the sensitivity of photographic layers, which often only becomes visible after a long period of storage.
  • LDPE and HDPE types and their mixtures Another disadvantage of the LDPE and HDPE types and their mixtures is that the possible content of white pigment, usually titanium dioxide, is limited to around 12% by weight if one does not want to accept drastically difficult processing conditions.
  • the object of the invention is to circumvent the disadvantages mentioned essentially by using a special type of polyethylene.
  • the object is achieved in that the photographic paper support is coated with a polyethylene (PE) produced by the high-pressure process with a density between 0.930 and 0.936 g / cm 3, alone or in admixtures with LDPE's usual density.
  • PE polyethylene
  • the high-pressure polyethylene LDPE according to the invention with a density of 0.934 g / cm 3 was extruded with a layer thickness of 30 ⁇ m on both sides onto a photo base paper of 170 g / m 2 at a machine speed of 100 m / min. applied, whereby the base paper was subjected to a weak but constant corona pretreatment.
  • a polyethylene mixture of 60% by weight LDPE with a density of 0.917 g / cm3 and 40% by weight HDPE with a density of 0.960 g / cm3 was applied under the same conditions as a comparison.
  • the mixture had a density of 0.934 g / cm3.
  • a polyolefin mixture according to the invention consisting of pure LDPE composed of 65% by weight LDPE according to the invention of 0.934 g / m3 and 35% by weight LDPE of 0.917 g / m3 density was applied to the corresponding base paper.
  • Both polyethylene mixtures had a density of 0.928 g / cm 3 .
  • Examples 5 to 8 the polyethylenes of Examples 1 to 4 were mixed with 10% by weight of rutile-type titanium dioxide and applied to the base paper under the same conditions.
  • the stated adhesion of the polyethylene film to the base paper was assessed by peeling a 10 mm wide polyethylene strip in the running direction. Grades from 1 to 5 were awarded, whereby grade 1 means very good adhesion.
  • the specified stiffness of the polyethylene-coated paper was measured according to the Scan standard. P 29:69.

Abstract

1. Photographic paper support comprising a water-resistant coating of a polyolefin, characterized in that it is coated with a PE (polyethylene) produced by the high-pressure method and having a density of 0.930 to 0.936 g/cm**3 , alone or in a mixture with LDPEs of usual density.

Description

Die Erfindung betrifft einen fotografischen Papierträger mit einer wasserfesten Beschichtung aus einem Polyolefin.The invention relates to a photographic paper support with a waterproof coating made of a polyolefin.

Wasserfeste fotografische Papiere bestehen aus einem Basispapier mit auf beiden Seiten aufgebrachten Kunstharzbeschichtungen, die entweder aus Polyolefinen, z. B. aus Polyäthylen, bestehen und mittels Extrusionsbeschichtung auf das Papier aufgebracht werden oder aus organischer Lackmischung, die mittels Tauch- oder Sprühverfahren auf das Papier aufgebracht sind und mittels Wärme oder energiereicher Strahlung getrocknet und verfestigt werden.Waterproof photographic papers consist of a base paper with synthetic resin coatings applied on both sides, which are either made of polyolefins, e.g. B. made of polyethylene, and are applied to the paper by means of extrusion coating or from organic lacquer mixture which are applied to the paper by means of dipping or spraying and dried and solidified by means of heat or high-energy radiation.

Auf eine der Kunstharzschichten werden dann einer oder mehrere auf Silberhalogenid basierende lichtempfindliche Überzüge aufgebracht. Bei den lichtempfindlichen Schichten kann es sich sowohl um Schwarz-Weiß- als auch um farbfotografische Schichten handeln.One or more photosensitive coatings based on silver halide are then applied to one of the synthetic resin layers. The light-sensitive layers can be black and white as well as color photographic layers.

Der unter der bzw. den lichtempfindlichen Schichten angeordnete Kunstharzfilm (Vorderseitenbeschichtung) enthält üblicherweise lichtreflektierendes Weißpigment sowie gegebenenfalls Farbpigmente, optische Aufheller und/oder andere Zusätze, wie Antistatika, Dispergierhilfsmittel für das Weißpigment, Antioxidantien, Trennmittel und dgl.The synthetic resin film (front coating) arranged under the light-sensitive layers usually contains light-reflecting white pigment and, if appropriate, color pigments, optical brighteners and / or other additives, such as antistatic agents, dispersants for the white pigment, antioxidants, release agents and the like.

Der auf der den lichtempfindlichen Schichten entgegengesetzten Papierseite angeordnete Kunstharzfilm (Rückseitenbeschichtung) kann pigmentiert oder unpigmentiert sein und/oder andere Zusätze enthalten, die sich aus der jeweiligen Verwendung des Laminats als fotografischer Träger ergeben und die grundsätzlich denen der Vorderseitenbeschichtung entsprechen können.The synthetic resin film (backside coating) arranged on the paper side opposite the photosensitive layers can be pigmented or unpigmented and / or contain other additives which result from the respective use of the laminate as a photographic support and which can in principle correspond to those of the front side coating.

Die Vorderseitenbeschichtung kann noch zusätzliche Funktionsschichten enthalten, die beispielsweise die Haftung der lichtempfindlichen Schichten verbessert.The front coating can also contain additional functional layers which, for example, improve the adhesion of the light-sensitive layers.

Die Rückseitenbeschichtung kann auch noch mit weiteren Funktionsschichten versehen werden, die beispielsweise die Beschreibbarkeit, Antistatik, Gleiteigenschaften, Planlage verbessern.The backside coating can also be provided with further functional layers which improve, for example, the writeability, antistatic properties, sliding properties, flatness.

Die Beschichtung eines fotografischen Basispapiers mit einem Polyolefinüberzug mittels Extrusion durch eine Breitschlitzdüse ist ein an sich bekanntes Verfahren. Es ist ebenso bekannt, daß bei der Extrusion von Polyäthylen (PE) gewisse Schwierigkeiten auftreten, die bei der hohen Empfindlichkeit fotografischer Prozesse zu deutlichen Störungen oder sogar zur Unbrauchbarkeit des Trägermaterials führen können.The coating of a photographic base paper with a polyolefin coating by extrusion through a slot die is a known process. It is also known that certain difficulties arise during the extrusion of polyethylene (PE), which, due to the high sensitivity of photographic processes, can lead to significant disturbances or even to the uselessness of the support material.

Nachteile treten insbesondere bei Polyäthylen niedriger Dichte (LDPE) auf und von denen insbesondere die erhöhte Neigung zum Kleben in der gewickelten Rolle zu nennen ist. Besonders bei glänzenden Oberflächen entstehen durch das Trennen der Schichten beim Abwickeln punktförmige Aufrupfungen, sogenannte Wickelpits. Ein weiterer Nachteil ist die unzureichende Steifigkeit des Produktes.Disadvantages occur particularly in the case of low-density polyethylene (LDPE) and of which the increased tendency to stick in the wound roll should be mentioned in particular. In the case of shiny surfaces in particular, the layers are separated when they are unwound, resulting in point-like tufts, so-called winding pits. Another disadvantage is the insufficient rigidity of the product.

Aber auch bei Polyäthylenen mit höherer Dichte (HDPE) stellen sich Nachteile ein, genannt sei die stark verminderte Haftfestigkeit auf dem Basispapier, hervorgerufen durch die höhere Schmelzviskosität und Kristallinität des Produktes. Man kann diese Nachteile korrigieren durch erhöhte Extrudertemperaturen und/oder niedrigere Maschinengeschwindigkeiten, aber nur bedingt.However, there are also disadvantages with higher density polyethylene (HDPE), such as the greatly reduced adhesive strength on the base paper, caused by the higher melt viscosity and crystallinity of the product. These disadvantages can be corrected by increased extruder temperatures and / or lower machine speeds, but only to a limited extent.

Ein weiterer Nachteil des HDPE sind seine vermehrten Inhomogenitäten, die aus kleinen, aber deutlich sichtbaren Agglomeraten von vernetzten oder gelierten hochmolekularen Anteilen des Polyäthylens herrühren und der zur Stabilisierung zugesetzten Hilfsmittel.Another disadvantage of the HDPE is its increased inhomogeneities, which result from small but clearly visible agglomerates of cross-linked or gelled high-molecular-weight portions of polyethylene and the auxiliary agents added for stabilization.

HDPE läßt sich außerdem nicht bei den geforderten Maschinengeschwindigkeiten auf Schichtdicken von 10 - 50 11m ausziehen, ohne Fehlstellen und Löcher im geschmolzenen Film zu hinterlassen. Sekundäre Störungen durch erhöhte Extrudertemperaturen sind dunkel gefärbte Partikel, die von abgebautem, zersetztem oder verbranntem Polyäthylen herrühren, während Agglomerate, auch Gelkörper oder Stippen genannt, zu Störungen beim Beguß mit lichtempfindlichen Silberhalogenidemulsionen führen, die im entwickelten Bild Stellen vermin derter, veränderter oder gänzlich fehlender Schwarz- bzw. Farbdichte geben. Stabilisatoren im Polyäthylen können Einfluß nehmen auf die Sensibilität fotografischer Schichten, die oft erst nach langer Lagerzeit sichtbar wird.HDPE can also not be pulled out at the required machine speeds on layer thicknesses of 10 - 50 11m without leaving defects and holes in the molten film. Secondary disturbances due to increased extruder temperatures are dark colored particles, which result from degraded, decomposed or burned polyethylene, while agglomerates, also called gel bodies or specks, lead to disturbances when pouring light-sensitive silver halide emulsions, which in the developed image reduce, change or completely missing places Give black or color density. Stabilizers in polyethylene can influence the sensitivity of photographic layers, which often only becomes visible after a long period of storage.

Um die Nachteile zu begrenzen, die besonders durch HDPE hervorgerufen werden, werden üblicherweise Mischungen aus LDPE und HDPE eingesetzt (z.B. US-A 3 853 592 und GB-A 1 113 105). Der Dichtebereich der Polyäthylentypen liegt bei LDPE zwischen 0,914 und 0,926 g/cm3 und beim HDPE zwischen 0,950 und 0,965 g/cm3. Durch Mischen der Typen läßt sich nahezu jeder Dichtebereich einstellen. Trotz der Mischung beider Polyäthylentypen lassen sich die Probleme, die besonders HDPE betreffen, nicht völlig eliminieren. Hierzu gehören die sich bildenden Gelkörper und sonstigen Agglomerate sowie die im HDPE anwesenden Stabilisatoren.In order to limit the disadvantages, which are caused in particular by HDPE, mixtures of LDPE and HDPE are usually used (for example US Pat. No. 3,853,592 and GB-A 1 113 105). The density range of the polyethylene types is between 0.914 and 0.926 g / cm 3 for LDPE and between 0.950 and 0.965 g / cm 3 for HDPE. By mixing the types, almost every density range can be set. Despite the mixture of both types of polyethylene, the problems that particularly affect HDPE cannot be completely eliminated. These include the gel bodies and other agglomerates that form and the stabilizers present in the HDPE.

Ein weiterer Nachteil der LDPE- und HDPE-Typen sowie deren Mischugnen liegt darin, daß der mögliche Gehalt an Weißpigment, üblicherweise Titandioxid, bei etwa 12 Gew.-% begrenzt ist, will man nicht drastisch erschwerte Verarbeitungsbedingungen in Kauf nehmen.Another disadvantage of the LDPE and HDPE types and their mixtures is that the possible content of white pigment, usually titanium dioxide, is limited to around 12% by weight if one does not want to accept drastically difficult processing conditions.

Aufgabe der Erfindung ist es, die erwähnten Nachteile im wesentlichen dadurch zu umgehen, daß ein Polyäthylen besonderer Art verwendet ist.The object of the invention is to circumvent the disadvantages mentioned essentially by using a special type of polyethylene.

Gelöst wird die Aufgabe dadurch, daß der fotografische Papierträger mit einem nach dem Hochdruckverfahren hergestellten Polyäthylen (PE) mit einer Dichte zwischen 0,930 und 0,936 g/cm3 allein oder in Abmischungen mit LDPE's üblicher Dichte beschichtet ist.The object is achieved in that the photographic paper support is coated with a polyethylene (PE) produced by the high-pressure process with a density between 0.930 and 0.936 g / cm 3, alone or in admixtures with LDPE's usual density.

Es war überraschend und nicht vorauszusehen, daß sogar die für die Anwendung wichtigen Eigenschaften, die eigentlich nur durch HDPE erhalten werden, insbesondere die Steifigkeit des Trägers, allein mit diesem erfindungsgemäßen PE voll erhalten werden. Außerdem wurde ein deutlich verringerter Gehalt an Stippen und eine bessere Haftung auf dem Basispapier bei guten Steifigkeitswerten ermittelt und das Fehlen der Wickelpits. Verglichen mit herkömmlichem PE ist die Pigmentbenetzung besser, so daß der Gehalt an Weißpigment auf etwa 20 Gew.-% erhöht werden kann.It was surprising and not foreseeable that even the properties important for the application, which are actually only obtained by HDPE, in particular the stiffness of the support, al can be fully obtained with this PE according to the invention. In addition, a significantly reduced speck content and better adhesion to the base paper with good stiffness values were determined and the absence of the winding pits. Compared to conventional PE, the pigment wetting is better, so that the white pigment content can be increased to about 20% by weight.

Die folgenden Beispiele sollen die Erfindung näher erläutern.The following examples are intended to explain the invention in more detail.

Beispiel 1example 1

Das erfindungsgemäße Hochdruckpolyäthylen LDPE mit einer Dichte von 0,934 g/cm3 wurde mittels Extruder mit einer Schichtdicke von je 30 µm beidseitig auf ein Fotobasispapier von 170 g/m2 bei einer Maschinengeschwindigkeit von 100 m/min. aufgetragen, wobei das Basispapier einer schwachen, aber gleichbleibenden Coronavorbehandlung unterzogen wurde.The high-pressure polyethylene LDPE according to the invention with a density of 0.934 g / cm 3 was extruded with a layer thickness of 30 μm on both sides onto a photo base paper of 170 g / m 2 at a machine speed of 100 m / min. applied, whereby the base paper was subjected to a weak but constant corona pretreatment.

Beispiel 2Example 2

Unter gleichen Bedingungen wurde als Vergleich eine Polyäthylenmischung aus 60 Gew.-% LDPE mit der Dichte von 0,917 g/cm3 und 40 Gew.-% HDPE mit der Dichte 0,960 g/cm3 aufgetragen. Die Mischung hatte die Dichte von 0,934 g/cm3.A polyethylene mixture of 60% by weight LDPE with a density of 0.917 g / cm3 and 40% by weight HDPE with a density of 0.960 g / cm3 was applied under the same conditions as a comparison. The mixture had a density of 0.934 g / cm3.

Beispiel 3Example 3

Unter gleichen Bedingungen wurde eine erfindungsgemäße Polyolefinmischung aus reinem LDPE aus 65 Gew.-% erfindungsgemäßem LDPE von 0,934 g/m3 und 35 Gew.-% LDPE von 0,917 g/m3 Dichte auf das entsprechende Basispapier aufgetragen.Under the same conditions, a polyolefin mixture according to the invention consisting of pure LDPE composed of 65% by weight LDPE according to the invention of 0.934 g / m3 and 35% by weight LDPE of 0.917 g / m3 density was applied to the corresponding base paper.

Beispiel 4Example 4

Als Vergleich wurde eine Polyäthylenmischung von 75 Gew.-% LDPE mit der Dichte von 0,917 g/cm3 und 25 Gew.-% HDPE mit der Dichte 0,960 g/cm3 auf das Basispapier aufgetragen.As a comparison, a polyethylene mixture of 75% by weight LDPE with a density of 0.917 g / cm 3 and 25% by weight HDPE with a density of 0.960 g / cm 3 was applied to the base paper.

Beide Polyäthylenmischungen (Beispiel 3 und 4) hatten die Dichte von 0,928 g/cm3.Both polyethylene mixtures (Examples 3 and 4) had a density of 0.928 g / cm 3 .

Als Beispiele 5 bis 8 wurden die Polyäthylene der Beispiele 1 bis 4 mit 10 Gew.-% Titandioxid vom Rutiltyp vermischt und unter gleichen Bedingungen auf das Basispapier aufgetragen.As Examples 5 to 8, the polyethylenes of Examples 1 to 4 were mixed with 10% by weight of rutile-type titanium dioxide and applied to the base paper under the same conditions.

Die Ergebnisse der Beispiele 1 bis 8 zeigt die Tabelle.

Figure imgb0001
The results of Examples 1 to 8 are shown in the table.
Figure imgb0001

Die angegebene Haftung des Polyäthylenfilms auf dem Basispapier wurde beurteilt durch Abziehen eines 10 mm breiten Polyäthylenstreifens in Laufrichtung. Erteilt wurden Noten von 1 bis 5, wobei Note 1 eine sehr gute Haftung bedeutet. Die an gegebene Steifigkeit des mit Polyäthylen beschichteten Papiers wurde gemessen nach der Norm Scan. P 29:69.The stated adhesion of the polyethylene film to the base paper was assessed by peeling a 10 mm wide polyethylene strip in the running direction. Grades from 1 to 5 were awarded, whereby grade 1 means very good adhesion. The specified stiffness of the polyethylene-coated paper was measured according to the Scan standard. P 29:69.

Claims (4)

1. Photographic paper support comprising a water-resistant coating of a polyolefin, characterized in that it is coated with a PE (polyethylene) produced by the high-pressure method and having a density of 0.930 to 0.936 g/cm3, alone or in a mixture with LDPEs of usual density.
2. Paper support according to Claim 1, characterized in that the polyethylene used for the water-resistant coating is a polyethylene which is produced by the high-pressure method and has a density of 0.934 g/cm3.
3. Paper support according to Claims 1 and 2, characterized in that the polyethylene contains a white pigment up to a quantity of 20% by wt.
4. Paper support according to Claims 1 to 3, characterized in that admixtures are added to the polyethylene which positively influence the use as photographic support, such as for example pigments, optical brighteners, stabilizers and antioxygenes.
EP87108526A 1986-08-16 1987-06-12 Photographic-paper support with a water-resistant polyolefinic coating Expired - Lifetime EP0259548B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108526T ATE56544T1 (en) 1986-08-16 1987-06-12 PHOTOGRAPHIC PAPER SUPPORT WITH A WATER RESISTANT COATING OF A POLYOLEFIN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3627859 1986-08-16
DE19863627859 DE3627859A1 (en) 1986-08-16 1986-08-16 PHOTOGRAPHIC PAPER CARRIER WITH A WATERPROOF COATING FROM A POLYOLEFIN

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EP0259548A1 EP0259548A1 (en) 1988-03-16
EP0259548B1 true EP0259548B1 (en) 1990-09-12

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US (1) US4898773A (en)
EP (1) EP0259548B1 (en)
JP (1) JPS6349755A (en)
CN (1) CN1015074B (en)
AT (1) ATE56544T1 (en)
AU (1) AU599405B2 (en)
DE (2) DE3627859A1 (en)
ES (1) ES2017481B3 (en)
GR (1) GR900300097T1 (en)
HU (1) HU207111B (en)
PT (1) PT85089B (en)

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US5198328A (en) * 1989-04-04 1993-03-30 Fuji Photo Film Co., Ltd. Silver halide color photographic light-sensitive material
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HU207111B (en) 1993-03-01
US4898773A (en) 1990-02-06
HUT55426A (en) 1991-05-28
AU599405B2 (en) 1990-07-19
PT85089A (en) 1988-08-17
GR900300097T1 (en) 1991-09-27
DE3764912D1 (en) 1990-10-18
ES2017481B3 (en) 1991-02-16
CN1015074B (en) 1991-12-11
EP0259548A1 (en) 1988-03-16
JPS6349755A (en) 1988-03-02
PT85089B (en) 1993-07-30
CN87105667A (en) 1988-04-06
ATE56544T1 (en) 1990-09-15
DE3627859A1 (en) 1988-02-25
AU7671587A (en) 1988-02-18

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