EP0604732A1 - Carrier for photo sensitive material with anti-coiling layer coated on the backside - Google Patents

Carrier for photo sensitive material with anti-coiling layer coated on the backside Download PDF

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Publication number
EP0604732A1
EP0604732A1 EP19930117767 EP93117767A EP0604732A1 EP 0604732 A1 EP0604732 A1 EP 0604732A1 EP 19930117767 EP19930117767 EP 19930117767 EP 93117767 A EP93117767 A EP 93117767A EP 0604732 A1 EP0604732 A1 EP 0604732A1
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EP
European Patent Office
Prior art keywords
gelatin
layer
amount
support
weight
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.)
Granted
Application number
EP19930117767
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German (de)
French (fr)
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EP0604732B1 (en
Inventor
Horst Dipl.-Ing. Westfal
Andreas Diekmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felix Schoeller Jr Foto und Spezialpapiere GmbH
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Felex Schoeller Jr and GmbH and Co KG
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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
    • G03C1/81—Photosensitive materials characterised by the base or auxiliary layers characterised by anticoiling means
    • 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
    • Y10S430/131—Anticurl layer
    • 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]
    • 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]
    • Y10T428/31801—Of wax or waxy material

Definitions

  • the invention describes a layer support for light-sensitive materials with an anti-roll layer on the back, which contains at least one hardening agent and a fermentatively degraded bone gelatin with> 40% low molecular weight parts of ⁇ 100,000 molecular weight and a gelatin strength of 200-250 g Bloom.
  • the invention relates to a support for light-sensitive materials with an anti-roll layer on the back.
  • gelatin layers swell with water and have little mechanical strength when swollen. For this reason, they are usually hardened using suitable hardening agents.
  • the hardening agents crosslink the gelatin molecules with one another and thereby reduce the water absorption or swellability of the layer, increase the melting point and improve the mechanical strength of the gelatin layer.
  • Hardened gelatin layers are above all resistant to the photographic treatment baths.
  • the light-sensitive gelatin-containing layers on the front of the carrier material are usually opposite gelatin-containing layers on the back of the carrier material.
  • the swelling behavior in the photographic treatment baths and the behavior of the layers during subsequent drying should be kept as identical as possible, so that the material maintains a good flatness during the entire working process and during later use.
  • the layers applied to the back are therefore called anti-roll, anti-curl or non-curling layers. Their layer thickness depends on the swelling behavior and the layer thickness of the front coating.
  • the anti-roll layers usually also contain various additives. These can be: wetting agents such as saponin, matting agents such as silica, plasticizers such as glycerin, organic acids such as citric acid, small amounts of other water-soluble high-polymer compounds such as polyvinyl alcohol or antistatic agents such as sodium nitrate.
  • wetting agents such as saponin
  • matting agents such as silica
  • plasticizers such as glycerin
  • organic acids such as citric acid
  • small amounts of other water-soluble high-polymer compounds such as polyvinyl alcohol or antistatic agents such as sodium nitrate.
  • the resistance of the anti-roll layers to the photographic treatment baths is achieved by hardening the gelatin with so-called hardening agents.
  • Known hardening agents for gelatin include chromium (III) salts, aldehydes, N-methylol compounds, dialdehyde polysaccharides, polyfunctional epoxides, aziridines, polyfunctional vinyl compounds, triacryl formal, substituted dichloro-s-triazines and others in Chap. 2 of the book "The Theory of the Photographic Process” by T.H. Substances described by James (London, 1977).
  • the hardening agents are either added to the gelatin-containing solutions before processing or they are applied as a separate solution to the gelatin layer already on a carrier. In the second case, the hardening agents diffuse into the gelatin layer, where they react with the peptide chains.
  • Both methods can also be combined with one another in such a way that part of the hardening agent is added to the gelatin solution and another part is subsequently applied to the layer.
  • All substances used as hardening agents have a preferred area of use and are not optimal for other applications, i.e. suffers from one or more disadvantages.
  • Aliphatic aldehydes and diketones are not suitable for color photographic layers because they can react with conventional color couplers or other emulsion additives.
  • Polyepoxides, triazines and polysaccharides are good for color photographic layers, but they react very slowly and are therefore not suitable for gelatin layers that are mechanically stressed shortly after the layer has dried.
  • Other curing agents e.g. Chromium salts are so reactive that a gelatin solution added to them shows an increase in viscosity during processing.
  • Still other hardening agents are not sufficiently resistant to diffusion and change the hardening state of adjacent layers during storage.
  • Every hardening agent known hitherto has one or the other disadvantage and does not have the wide range of possible uses, as is particularly desirable in the case of auxiliary gelatin layers which are applied to a support prior to emulsionation and are later in contact with the actual photographic layers.
  • DE 3 721 808 describes rapid gelatin hardening by applying two successive coatings, the second upper coating being formed from a hardening agent solution of chromium salts.
  • the desired water absorption of less than 2.5 g H2O per 1 g gelatin is achieved according to the published patent only by the separately applied chromium (III) salt-containing hardening agent layer.
  • the result of this is that the back of the light-sensitive substrate always has an undesirable pale green discoloration depending on the amount and layer thickness of the anti-roll layer.
  • EP 395 785 achieves the desired low water absorption with a coating which contains gelatin, an aliphatic polyhydric alcohol, an N-methylol compound and a reaction product of triazine and formaldehyde.
  • the lowest possible water absorption capacity is aimed for anti-roll layers.
  • a low water absorption capacity means intensive hardening of the gelatinous layer. At the same time, this results in improved resistance to mechanical stress, such as that provided by the transport rollers in the automatic developer.
  • the aim is to develop an anti-roll layer whose water absorption capacity is further reduced compared to the prior art described.
  • This task is solved by a layer support for light-sensitive materials with a rear anti-roll layer of at least hardening agent and a fermented bone gelatin.
  • the gelatin according to the invention has more than 40% low molecular weight components with less than 100,000 molecular weight and bloom values of 200-250 g.
  • triglycidyl isocyanurate is used as the curing agent.
  • Bloom is a measure of gelatin strength (gelatin elasticity) and is given as the force required to press a stamp with a diameter of 12.7 mm and a flat surface into a gel of 6.6% dry substance 4.00 mm deep.
  • This widely degraded gelatin has an increased number of reactive groups and thus enables a higher crosslinking density (hardening). It can be hardened with all hardening agents that are also used for standard types of gelatin. In all cases, the hardening is more intensive, and thus the properties of scratch and water resistance desired for an anti-roll layer improve.
  • Alifatic aldehydes, di- and triazines, polyepoxides, polyfunctional vinyl compounds and chromium salts have established themselves as preferred hardening agents for anti-roll layers from the abundance of the products available.
  • the amount of hardener is 0.5-12% by weight, preferably 1-6% by weight, based on the amount of gelatin.
  • the anti-roll layers can additionally contain wetting agents such as saponin, plasticizers such as aliphatic polyalcohols, matting agents such as silicas, organic acids such as citric acid, antistatic agents such as inorganic salts or rheological agents such as carboxymethyl cellulose.
  • wetting agents such as saponin, plasticizers such as aliphatic polyalcohols, matting agents such as silicas, organic acids such as citric acid, antistatic agents such as inorganic salts or rheological agents such as carboxymethyl cellulose.
  • Aliphatic polyalcohols in this sense are ethylene glycol, glycerin and polyglycols up to a molecular weight of 2000.
  • a mixture of gelatin according to the invention and the hardening agent triglycidyl isocyanurate is claimed.
  • the water absorption of the anti-roll layer is less than 1 g / g of gelatin, measured after 10 minutes of distilled water exposure at 22 ° C.
  • the hardenability is determined with the Tecam solidification timer. 135 g of water are added to 15 g of a 10% gelatin solution. This solution is swollen at room temperature for 30 min and then melted at 40 ° C. At 35 ° C the pH is adjusted to 6.0 in the Tecam device, 4.2 ml of 10% formalin solution is added and the mixture is stirred for 15 minutes. The time that is required for the formation of a solid gel is then measured with the Tecam device.
  • the anti-roll layer can be applied to the substrate in one or two work steps.
  • the solution to be applied must already include all components. If coating is carried out in two steps, the coating solution to be applied first usually contains a smaller amount of hardening agents. However, this amount must be such that after drying, this first layer survives the mechanical stress of the second coating without damage.
  • This second coating solution usually consists of a dilute hardening agent solution.
  • the desired properties of the anti-roll layer can be achieved, including those of the preferred form with triglycidyl isocyanurate.
  • the single-layer variant is preferred for economic and production reasons. For economic reasons, drying of the applied coating solution from the sol form is also preferred.
  • the coating solution can be applied using all customary application and metering methods, such as, for example, roller application, engraving or nip methods, with, if appropriate, subsequent air brush or roller doctor metering.
  • the anti-roll layer which is particularly preferred according to the invention and which contains at least the gelatin according to the invention and the hardening agent triglycidyl isocyanurate shows a further advantageous property as the coating solution to be applied.
  • the coating solution can be processed in a wide pH range from pH 5 to pH 9 without problems with regard to the rheology of the solution and with regard to the layer properties achieved. This means that the solution meets various requirements and that it can cope with fluctuations in the pH during processing.
  • a layer support consisting of 175 g / m2 of paper and a layer of 35 g / m2 of polyethylene on each side, the polyethylene layer on the front being 11.5% by weight of titanium dioxide pigment, was coated with the following anti-roll layer solutions:
  • the anti-roll layer solution was applied to the back of the layer support by means of a roller application device and knife metering and dried out of the sol mold in a hot air duct at an air temperature of 130 ° C.
  • the machine speed was 120 m / min.
  • Example B5 Example B6 Cf. V4 B4a B4b B4c Gelatin 1 25th - - - - - 55.0 Gelatin 2 30th 45.0 45.0 45.0 55.0 42.5 - Sodium nitrate 25th 1.2 1.2 1.2 1.4 1.2 1.2 Silicon dioxide - 4.4 4.4 4.4 - 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4
  • test strip is immersed in distilled water at 22 ° C for 10 minutes and then dried.
  • the test strip is weighed before and after drying. The weight difference is based on the amount of gelatin that this test strip has.
  • the amount of gelatin is calculated from the recipe, the application weight and the sample size. The water absorption is given in g water / 1g gelatin.
  • the sample to be tested is placed in warm water at 30 ° C for one minute. Then the still wet sample is pulled under a rake, the 6 individual prongs (tines) of which have weights of different weights, up to a maximum of 100 g. The pulling speed is 0.8 cm / s. The tested sample is dried. The scratch marks for visualization stained with paper light blue. The number of visible scratch marks (max. 6) is given.
  • the test results show that the values of water absorption and scratch resistance are improved by using the gelatin according to the invention.
  • anti-roll layers with water absorption of ⁇ 1 g water / g gelatin can be achieved with favorable rheological values of the coating solution and in a wide pH range.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Paints Or Removers (AREA)
  • Materials For Medical Uses (AREA)
  • Laminated Bodies (AREA)

Abstract

The test results show that the water absorption and scratch resistance values are improved by using the gelatin of the invention. In combination with triglycidyl isocyanurate as hardener, anti-coiling layers having a water absorption of < 1 g of water/g of gelatin can be obtained over a wide pH range and while the rheological values of the coating solution are favourable.

Description

Die Erfindung beschreibt einen Schichtträger für lichtempfindliche Materialien mit einer Antirollschicht auf der Rückseite, die mindestens ein Härtungsmittel und eine fermentativ abgebaute Knochengelatine mit > 40 % niedermolekularen Anteilen von < 100.000 Molgewicht und einer Gallertfestigkeit von 200 - 250 g Bloom enthält.The invention describes a layer support for light-sensitive materials with an anti-roll layer on the back, which contains at least one hardening agent and a fermentatively degraded bone gelatin with> 40% low molecular weight parts of <100,000 molecular weight and a gelatin strength of 200-250 g Bloom.

Die Erfindung betrifft einen Schichtträger für lichtempfindliche Materialien mit einer Antirollschicht auf der Rückseite.The invention relates to a support for light-sensitive materials with an anti-roll layer on the back.

Bei den meisten fotografischen Materialien wird Gelatine zum Aufbau der Silberhalogenidemulsionen, der Schutzschichten und der Rückseitenschichten verwendet. Gelatineschichten quellen jedoch mit Wasser und haben im gequollenen Zustand geringe mechanische Festigkeit. Deshalb werden sie üblicherweise durch geeignete Härtungsmittel gehärtet. Die Härtungsmittel vernetzen die Gelatinemoleküle miteinander und bewirken dadurch eine Verminderung der Wasseraufnahme bzw. Quellfähigkeit der Schicht, eine Erhöhung des Abschmelzpunktes und eine Verbesserung der mechanischen Festigkeit der Gelatineschicht. Gehärtete Gelatineschichten sind vor allem resistent gegenüber den fotografischen Behandlungsbädern.Most photographic materials use gelatin to build up the silver halide emulsions, protective layers and backing layers. However, gelatin layers swell with water and have little mechanical strength when swollen. For this reason, they are usually hardened using suitable hardening agents. The hardening agents crosslink the gelatin molecules with one another and thereby reduce the water absorption or swellability of the layer, increase the melting point and improve the mechanical strength of the gelatin layer. Hardened gelatin layers are above all resistant to the photographic treatment baths.

Den lichtempfindlichen gelatinehaltigen Schichten auf der Vorderseite des Trägermaterials liegen meistens gelatinehaltige Schichten auf der Rückseite des Trägermaterials gegenüber. Durch Einsatz des gleichen Bindemittels Gelatine auf beiden Seiten des Trägermaterials soll das Quellverhalten in den fotografischen Behandlungsbädern und das Verhalten der Schichten bei anschließender Trocknung möglichst identisch gehalten werden, so daß während des gesamten Arbeitsprozesses sowie bei der späteren Verwendung das Material eine gute Planlage beibehält.The light-sensitive gelatin-containing layers on the front of the carrier material are usually opposite gelatin-containing layers on the back of the carrier material. By using the same gelatin binder on both sides of the carrier material, the swelling behavior in the photographic treatment baths and the behavior of the layers during subsequent drying should be kept as identical as possible, so that the material maintains a good flatness during the entire working process and during later use.

Die auf die Rückseite aufgebrachten Schichten werden deshalb als Antiroll-, Anticurl- oder Noncurling-Schichten bezeichnet. Ihre Schichtdicke hängt vom Quellverhalten und von der Schichtdicke der Vorderseitenbeschichtung ab.The layers applied to the back are therefore called anti-roll, anti-curl or non-curling layers. Their layer thickness depends on the swelling behavior and the layer thickness of the front coating.

Üblicherweise enthalten die Antirollschichten noch verschiedene Zusatzstoffe. Diese können sein: Netzmittel wie Saponin, Mattierungsmittel wie Kieselsäure, Weichmacher wie Glycerin, organische Säuren wie Zitronensäure, kleine Mengen anderer wasserlöslicher hochpolymerer Verbindungen wie Polyvinylalkohol oder Antistatika wie Natriumnitrat.The anti-roll layers usually also contain various additives. These can be: wetting agents such as saponin, matting agents such as silica, plasticizers such as glycerin, organic acids such as citric acid, small amounts of other water-soluble high-polymer compounds such as polyvinyl alcohol or antistatic agents such as sodium nitrate.

Die Resistenz der Antirollschichten gegenüber den fotografischen Behandlungsbädern wird erreicht durch Härtung der Gelatine mit sogenannten Härtungsmitteln.The resistance of the anti-roll layers to the photographic treatment baths is achieved by hardening the gelatin with so-called hardening agents.

Zu den bekannten Härtungsmitteln für Gelatine gehören Chrom(III)-salze, Aldehyde, N-Methylolverbindungen, Dialdehydpolysaccharide, polyfunktionelle Epoxide, Aziridine, polyfunktionelle Vinylverbindungen, Triacrylformal, substituierte Dichlor-s-Triazine und andere in Kap. 2 des Buches "The Theory of the Photographic Process" von T.H. James (London, 1977) beschriebene Substanzen.Known hardening agents for gelatin include chromium (III) salts, aldehydes, N-methylol compounds, dialdehyde polysaccharides, polyfunctional epoxides, aziridines, polyfunctional vinyl compounds, triacryl formal, substituted dichloro-s-triazines and others in Chap. 2 of the book "The Theory of the Photographic Process" by T.H. Substances described by James (London, 1977).

Die Härtungsmittel werden entweder den gelatinehaltigen Lösungen vor der Verarbeitung zugesetzt oder sie werden als gesonderte Lösung auf die bereits auf einem Träger befindliche Gelatineschicht aufgetragen. Im zweiten Fall diffundieren die Härtungsmittel in die Gelatineschicht, wo sie mit den Peptidketten in Reaktion treten.The hardening agents are either added to the gelatin-containing solutions before processing or they are applied as a separate solution to the gelatin layer already on a carrier. In the second case, the hardening agents diffuse into the gelatin layer, where they react with the peptide chains.

Beide Verfahrem können auch in der Weise miteinander kombiniert werden, daß ein Teil des Härtungsmittels der Gelatinelösung zugesetzt und ein anderer Teil nachträglich auf die Schicht gebracht wird.Both methods can also be combined with one another in such a way that part of the hardening agent is added to the gelatin solution and another part is subsequently applied to the layer.

Alle als Härtungsmittel gebräuchlichen Substanzen haben ein bevorzugtes Verwendungsgebiet und sind für andere Anwendungen nicht optimal, d.h. mit einem oder mehreren Nachteilen behaftet. Aliphatische Aldehyde und Diketone eigenen sich nicht für farbfotografische Schichten, weil sie mit üblichen Farbkupplern oder anderen Emulsionszusätzen in Reaktion treten können. Polyepoxide, Triazine und Polysaccharide eigenen sich zwar gut für farbfotografische Schichten, reagieren aber sehr langsam und sind deshalb nicht für Gelatineschichten geeignet, die kurz nach Trocknung der Schicht mechanisch beansprucht werden. Andere Härtungsmittel, z.B. Chromsalze, sind so reaktionsfähig, daß eine damit versetzte Gelatinelösung bereits während der Verarbeitung einen Viskositätsanstieg zeigt. Wieder andere Härtungsmittel sind nicht ausreichend diffusionsfest und verändern den Härtungszustand benachbarter Schichten während der Lagerung.All substances used as hardening agents have a preferred area of use and are not optimal for other applications, i.e. suffers from one or more disadvantages. Aliphatic aldehydes and diketones are not suitable for color photographic layers because they can react with conventional color couplers or other emulsion additives. Polyepoxides, triazines and polysaccharides are good for color photographic layers, but they react very slowly and are therefore not suitable for gelatin layers that are mechanically stressed shortly after the layer has dried. Other curing agents, e.g. Chromium salts are so reactive that a gelatin solution added to them shows an increase in viscosity during processing. Still other hardening agents are not sufficiently resistant to diffusion and change the hardening state of adjacent layers during storage.

Jedes bisher bekannte Härtungsmittel hat also den einen oder anderen Nachteil und besitzt nicht die breite Anwendungsmöglichkeit, wie sie vor allem bei Gelatinehilfsschichten erwünscht ist, die vor der Emulsionierung auf einen Träger aufgebracht werden und später mit den eigentlichen fotografischen Schichten in Kontakt sind.Every hardening agent known hitherto has one or the other disadvantage and does not have the wide range of possible uses, as is particularly desirable in the case of auxiliary gelatin layers which are applied to a support prior to emulsionation and are later in contact with the actual photographic layers.

Die DE 3 721 808 beschreibt eine schnelle Gelatinehärtung durch das Auftragen zweier nacheinander erfolgender Beschichtungen, wobei die zweite obere Beschichtung aus einer Härtungsmittellösung von Chromsalzen gebildet wird.DE 3 721 808 describes rapid gelatin hardening by applying two successive coatings, the second upper coating being formed from a hardening agent solution of chromium salts.

Diese Offenlegungsschrift beschreibt auch, aus welchem Grund das Wasseraufnahmevermögen von Antirollschichten geringer sein sollte als das von lichtempfindlichen Emulsionsschichten. Das Wasseraufnahmevermögen der gehärteten Antirollschichten wird in der DE 3 721 808 durch gravimetrische Bestimmung eines Probestreifens nach 10 Minuten Behandlung in destilliertem Wasser von 22°C mit anschließender Trocknung ermittelt.This published specification also describes the reason why the water absorption capacity of anti-roll layers should be lower than that of light-sensitive emulsion layers. The water absorption capacity of the hardened anti-roll layers is determined in DE 3 721 808 by gravimetric determination of a test strip after 10 minutes of treatment in distilled water at 22 ° C. with subsequent drying.

Die angestrebte Wasseraufnahme von weniger als 2,5 g H₂O pro 1 g Gelatine wird gemäß der Offenlegungsschrift nur durch die separat aufgetragene chrom(III)-salzhaltige Härtungsmittelschicht erreicht. Das hat zur Folge, daß die Rückseite des lichtempfindlichen Schichtträgers je nach Menge und Schichtdicke der Antirollschicht stets eine unerwünschte schwach grüne Verfärbung aufweist.The desired water absorption of less than 2.5 g H₂O per 1 g gelatin is achieved according to the published patent only by the separately applied chromium (III) salt-containing hardening agent layer. The result of this is that the back of the light-sensitive substrate always has an undesirable pale green discoloration depending on the amount and layer thickness of the anti-roll layer.

Außerdem ist ein Auftrag von zwei Schichten aufwendiger und störanfälliger als das Auftragen von nur einer Schicht.Applying two coats is also more complex and prone to malfunction than applying just one coat.

Die EP 395 785 erreicht die gewünschte geringe Wasseraufnahme mit einer Beschichtung, die Gelatine, einen alifatischen mehrwertigen Alkohol, eine N-Methylolverbindung und ein Reaktionsprodukt aus Triazin und Formaldehyd enthält.EP 395 785 achieves the desired low water absorption with a coating which contains gelatin, an aliphatic polyhydric alcohol, an N-methylol compound and a reaction product of triazine and formaldehyde.

Für Antirollschichten wird ein möglichst geringes Wasseraufnahmevermögen angestrebt. Ein geringes Wasseraufnahmevermögen bedeutet intensive Härtung der gelatinehaltigen Schicht. Daraus ergibt sich gleichzeitig eine verbesserte Widerstandsfähigkeit gegen mechanische Beanspruchungen, wie sie beispielsweise durch die Transportwalzen in den Entwicklerautomaten gegeben ist.The lowest possible water absorption capacity is aimed for anti-roll layers. A low water absorption capacity means intensive hardening of the gelatinous layer. At the same time, this results in improved resistance to mechanical stress, such as that provided by the transport rollers in the automatic developer.

Es ist deshalb von besonderem Interesse, Produkte zu finden, die generell mit allen Härtungsmitteln eine bessere Gelatinehärtung ermöglichen.It is therefore of particular interest to find products that generally enable better gelatin hardening with all hardening agents.

Insbesondere wird angestrebt, eine Antirollschicht zu entwickeln, deren Wasseraufnahmevermögen gegenüber dem beschriebenen Stand der Technik weiter vermindert ist.In particular, the aim is to develop an anti-roll layer whose water absorption capacity is further reduced compared to the prior art described.

Es ist deshalb Aufgabe der Erfindung, einen Schichtträger für lichtempfindliche Materialien mit einer Antirollschicht auf der Rückseite zur Verfügung zu stellen, dessen Antirollschicht unempfindlicher gegenüber mechanischer Beanspruchung (Kratzfestigkeit) ist und eine verminderte Wasseraufnahme (Wasserfestigkeit) aufweist.It is therefore an object of the invention to provide a support for light-sensitive materials with an anti-roll layer on the back, the anti-roll layer is less sensitive to mechanical stress (scratch resistance) and has a reduced water absorption (water resistance).

Weiterhin ist es Aufgabe der Erfindung, die Antirollschicht so zu gestalten, daß ein schleierarmes Produkt entsteht.Furthermore, it is an object of the invention to design the anti-roll layer so that a low-fog product is produced.

Gelöst wird diese Aufgabe durch einen Schichtträger für lichtempfindliche Materialien mit einer rückseitigen Antirollschicht aus mindestens Härtungsmittel und einer fermentativ abgebauten Knochengelatine.This task is solved by a layer support for light-sensitive materials with a rear anti-roll layer of at least hardening agent and a fermented bone gelatin.

Insbesondere weist die erfindungsgemäße Gelatine mehr als 40 % niedermolekularer Anteile mit unter 100.000 Molekulargewicht und Bloomwerte von 200-250 g auf.In particular, the gelatin according to the invention has more than 40% low molecular weight components with less than 100,000 molecular weight and bloom values of 200-250 g.

Insbesondere wird als Härtungsmittel Triglycidylisocyanurat eingesetzt.In particular, triglycidyl isocyanurate is used as the curing agent.

Bloom ist ein Maß für die Gallertfestigkeit (Gallertelastizität) und wird als die Kraft angegeben, die erforderlich ist, um einen Stempel von 12,7 mm Durchmesser und ebener Unterfläche in ein Gel von 6,6 % Trockensubstanz 4,00 mm tief einzudrücken.Bloom is a measure of gelatin strength (gelatin elasticity) and is given as the force required to press a stamp with a diameter of 12.7 mm and a flat surface into a gel of 6.6% dry substance 4.00 mm deep.

Diese weit abgebaute Gelatine besitzt eine erhöhte Anzahl reaktionsfähiger Gruppen und ermöglicht dadurch eine höhere Vernetzungsdichte (Härtung). Sie läßt sich mit allen Härtungsmitteln härten, die auch für Standard-Gelatinesorten eingesetzt werden. In allen Fällen ist die Härtung intensiver, und damit verbessern sich die für eine Antirollschicht gewünschten Eigenschaften der Kratz- und Wasserfestigkeit.This widely degraded gelatin has an increased number of reactive groups and thus enables a higher crosslinking density (hardening). It can be hardened with all hardening agents that are also used for standard types of gelatin. In all cases, the hardening is more intensive, and thus the properties of scratch and water resistance desired for an anti-roll layer improve.

Als bevorzugte Härtungsmittel für Antirollschichten haben sich aus der Fülle der zur Verfügung stehenden Produkte alifatische Aldehyde, Di- und Triazine, Polyepoxide, polyfunktionelle Vinylverbindungen und Chromsalze durchgesetzt.Alifatic aldehydes, di- and triazines, polyepoxides, polyfunctional vinyl compounds and chromium salts have established themselves as preferred hardening agents for anti-roll layers from the abundance of the products available.

Die Härtungsmittelmenge beträgt 0,5 - 12 Gew.-%, bevorzugt 1 - 6 Gew.-%, bezogen auf die Gelatinemenge.The amount of hardener is 0.5-12% by weight, preferably 1-6% by weight, based on the amount of gelatin.

Die Antirollschichten können zusätzlich Netzmittel wie Saponin, Weichmacher wie alifatische Polyalkohole, Mattierungsmittel wie Kieselsäuren, organische Säuren wie Zitronensäure, Antistatika wie anorganische Salze oder rheologische Hilfsmittel wie Carboxymethylcellulose enthalten.The anti-roll layers can additionally contain wetting agents such as saponin, plasticizers such as aliphatic polyalcohols, matting agents such as silicas, organic acids such as citric acid, antistatic agents such as inorganic salts or rheological agents such as carboxymethyl cellulose.

Vorteilhaft hinsichtlich der Aushärtungsintensität, der Antistatik und der Elastizität der Antirollschicht hat sich der Zusatz eines alifatischen Polyalkohols erwiesen in Mengen von bis zu 50 Gew.-%, vorzugsweise 5 - 30 Gew.-%, bezogen auf Gelatinemenge. Alifatische Polyalkohole sind in diesem Sinne Ethylenglykol, Glycerin und Polyglykole bis zu einem Molekulargewicht von 2000.The addition of an aliphatic polyalcohol in amounts of up to 50% by weight, preferably 5-30% by weight, based on the amount of gelatin, has proven advantageous with regard to the curing intensity, the antistatic properties and the elasticity of the anti-roll layer. Aliphatic polyalcohols in this sense are ethylene glycol, glycerin and polyglycols up to a molecular weight of 2000.

In einer besonderen Ausgestaltung der Erfindung wird ein Gemisch aus erfindungsgemäßer Gelatine und dem Härtungsmittel Triglycidylisocyanurat beansprucht.In a particular embodiment of the invention, a mixture of gelatin according to the invention and the hardening agent triglycidyl isocyanurate is claimed.

In einer besonderen Ausgestaltung beträgt die Wasseraufnahme der Antirollschicht weniger als 1 g/g Gelatine, gemessen nach 10 Minuten Einwirkzeit von destilliertem Wasser von 22°C.In a special embodiment, the water absorption of the anti-roll layer is less than 1 g / g of gelatin, measured after 10 minutes of distilled water exposure at 22 ° C.

Um in einem Arbeitsgang genügend hohe Auftragsgewichte zu erreichen und gleichzeitig den zeitlichen Viskositätsanstieg der mit Härtungsmittel gemischten Gelatinelösung gering zu halten, soll die erfindungsgemäße Gelatine vorzugsweise noch folgende Kennzahlen aufweisen: Viskosität einer 10 Gew.-%ig.Lösung v. 40°C = 10-20 m Pas Härtbarkeit einer 10 Gew.-%ig.Lösung v. 35°C = 300-400 Min. In order to achieve sufficiently high application weights in one operation and at the same time to keep the viscosity increase of the gelatin solution mixed with hardening agent low, the gelatin according to the invention should preferably also have the following key figures: Viscosity of a 10% by weight solution of 40 ° C = 10-20 m Pas Curability of a 10% by weight solution of 35 ° C = 300-400 min.

Die Härtbarkeit wird bestimmt mit dem Tecam-Erstarrungszeitmesser. Zu 15 g einer 10%igen Gelatinelösung werden 135 g Wasser hinzugefügt. Diese Lösung wird bei Zimmertemperatur 30 min gequollen und dann bei 40°C aufgeschmolzen. Bei 35°C wird im Tecam-Gerät der pH-Wert auf 6,0 eingestellt, 4,2 ml 10%iger Formalinlösung hinzugefügt und 15 min gerührt. Mit dem Tecam-Gerät wird dann die Zeit gemessen, die zur Ausbildung eines festen Gels notwendig ist.The hardenability is determined with the Tecam solidification timer. 135 g of water are added to 15 g of a 10% gelatin solution. This solution is swollen at room temperature for 30 min and then melted at 40 ° C. At 35 ° C the pH is adjusted to 6.0 in the Tecam device, 4.2 ml of 10% formalin solution is added and the mixture is stirred for 15 minutes. The time that is required for the formation of a solid gel is then measured with the Tecam device.

Grundsätzlich kann die Antirollschicht auf den Schichtträger in einem oder in zwei Arbeitsgängen aufgetragen werden. Im ersten Fall muß die aufzutragende Lösung alle Komponenten schon beinhalten. Wird in zwei Arbeitsgängen beschichtet, so enthält die zuerst aufzutragende Beschichtungslösung üblicherweise eine geringere Menge an Härtungsmitteln. Diese Menge muß jedoch so bemessen sein, daß nach Trocknung diese erste Schicht die mechanische Beanspruchung der zweiten Beschichtung unbeschadet übersteht. Diese zweite Beschichtungslösung besteht üblicherweise aus einer verdünnten Härtungsmittellösung.In principle, the anti-roll layer can be applied to the substrate in one or two work steps. In the first case, the solution to be applied must already include all components. If coating is carried out in two steps, the coating solution to be applied first usually contains a smaller amount of hardening agents. However, this amount must be such that after drying, this first layer survives the mechanical stress of the second coating without damage. This second coating solution usually consists of a dilute hardening agent solution.

Mit beiden Verfahrensvarianten (Einschicht- und Zweischichtvariante) lassen sich die angestrebten Eigenschaften der Antirollschicht erreichen, auch die der bevorzugten Form mit Triglycidylisocyanurat. Bevorzugt wird aus wirtschaftlichen und produktionstechnischen Gründen die Einschichtvariante. Aus wirtschaftlichen Gründen wird auch eine Trocknung der aufgetragenen Beschichtungslösung aus der Solform heraus bevorzugt.With both process variants (one-layer and two-layer variants), the desired properties of the anti-roll layer can be achieved, including those of the preferred form with triglycidyl isocyanurate. The single-layer variant is preferred for economic and production reasons. For economic reasons, drying of the applied coating solution from the sol form is also preferred.

Die Beschichtungslösung kann mit allen gebräuchlichen Auftrags- und Dosierverfahren, wie beispielsweise Walzenantrag-, Gravur- oder Nip-Verfahren, mit gegebenenfalls anschließender Luftbürsten- oder Rollrakeldosierung aufgetragen werden.The coating solution can be applied using all customary application and metering methods, such as, for example, roller application, engraving or nip methods, with, if appropriate, subsequent air brush or roller doctor metering.

Die erfindungsgemäß besonders bevorzugte Antirollschicht, die mindestens die erfindungsgemäße Gelatine und das Härtungsmittel Triglycidylisocyanurat enthält, zeigt als aufzutragende Beschichtungslösung eine weitere vorteilhafte Eigenschaft. Ohne Probleme hinsichtlich der Rheologie der Lösung und hinsichtlich der erzielten Schichteigenschaften läßt sich die Beschichtungslösung in eimem weiten pH-Bereich von pH 5 bis pH 9 verarbeiten. Dieses bedeutet, daß die Lösung verschiedenen Anforderungen gerecht wird und daß sie Schwankungen im pH-Wert während der Verarbeitung verkraften kann.The anti-roll layer which is particularly preferred according to the invention and which contains at least the gelatin according to the invention and the hardening agent triglycidyl isocyanurate shows a further advantageous property as the coating solution to be applied. The coating solution can be processed in a wide pH range from pH 5 to pH 9 without problems with regard to the rheology of the solution and with regard to the layer properties achieved. This means that the solution meets various requirements and that it can cope with fluctuations in the pH during processing.

Die folgenden Beispiele sollen die Erfindung näher erläutern:The following examples are intended to illustrate the invention:

Beispiele und Vergleiche 1 - 3:Examples and comparisons 1 - 3:

Ein Schichtträger, bestehend aus 175 g/m² Papier und je einer Schicht von 35 g/m² Polyethylen pro Seite, wobei die Polyethylenschicht der Vorderseite mit 11,5 Gew.-% Titandioxid pigment war, wurde mit den folgenden Antirollschichtlösungen beschichtet:

Figure imgb0001
Figure imgb0002
 A layer support consisting of 175 g / m² of paper and a layer of 35 g / m² of polyethylene on each side, the polyethylene layer on the front being 11.5% by weight of titanium dioxide pigment, was coated with the following anti-roll layer solutions:
Figure imgb0001
Figure imgb0002

Die Antirollschichtlösung wurde mittels Walzenauftragsvorrichtung und Rakeldosierung auf die Rückseite des Schichtträgers aufgetragen und aus der Solform heraus im Heißluftkanal bei einer Lufttemperatur von 130°C getrocknet. Die Maschinengeschwindigkeit betrug 120 m/min.The anti-roll layer solution was applied to the back of the layer support by means of a roller application device and knife metering and dried out of the sol mold in a hot air duct at an air temperature of 130 ° C. The machine speed was 120 m / min.

Beispiele 4 - 6 und Vergleich 4:Examples 4-6 and Comparison 4:

Der Schichtträger aus Beispiel 1 wurde unter den gleichen Maschinenbedingungen mit den folgenden Antirollschichtlösungen beschichtet: Konzentr. d.wäßrig. Verdünng. Gew.-% Gewichtsanteile Beispiele Beisp. B5 Beisp. B6 Vergl. V4 B4a B4b B4c Gelatine 1 25 - - - - - 55,0 Gelatine 2 30 45,0 45,0 45,0 55,0 42,5 - Natriumnitrat 25 1,2 1,2 1,2 1,4 1,2 1,2 Siliciumdioxid - 4,4 4,4 4,4 - 4,4 4,4 Netzmittel Saponin Q 5 1,6 1,6 1,6 1,6 1,6 1,6 IPA/BU/H₂O - 8,0 8,0 8,0 8,0 10,0 8,0 Reisstärke - - - - 5,6 - - Tylose C300 2 - - - - 6,0 - Polyglykol MG=400 50 - -- - 7,0 - - TGIC* 2 24,2 24,2 24,2 13,4 32,0 24,2 Glycerin - 1,2 1,2 1,2 - 1,4 1,2 Entmineralis.Wasser 14,4 14,4 14,4 8,0 0,9 4,4 pH-Wert, eingest.auf 5,5 6,7 8,2 6,7 6,4 6,7 Viskosität mPas sof. 52 54 53 96 63 130 n.16 Std. 58 65 98 100 68 146 Auftragsgewicht g/m² (trocken) 3,7 3,6 3,7 4,3 2,9 3,6 * Triglycidylisocyanurat

Figure imgb0003
The layer support from Example 1 was coated with the following anti-roll layer solutions under the same machine conditions: Concentr. d.aqueous. Thinning. % By weight Parts by weight Examples Example B5 Example B6 Cf. V4 B4a B4b B4c Gelatin 1 25th - - - - - 55.0 Gelatin 2 30th 45.0 45.0 45.0 55.0 42.5 - Sodium nitrate 25th 1.2 1.2 1.2 1.4 1.2 1.2 Silicon dioxide - 4.4 4.4 4.4 - 4.4 4.4 Wetting agent Saponin Q 5 1.6 1.6 1.6 1.6 1.6 1.6 IPA / BU / H₂O - 8.0 8.0 8.0 8.0 10.0 8.0 Rice starch - - - - 5.6 - - Tylose C300 2nd - - - - 6.0 - Polyglycol MG = 400 50 - - - 7.0 - - TGIC * 2nd 24.2 24.2 24.2 13.4 32.0 24.2 Glycerin - 1.2 1.2 1.2 - 1.4 1.2 Demineralis.water 14.4 14.4 14.4 8.0 0.9 4.4 pH set to 5.5 6.7 8.2 6.7 6.4 6.7 viscosity mPas sof. 52 54 53 96 63 130 16 hours 58 65 98 100 68 146 Application weight g / m² (dry) 3.7 3.6 3.7 4.3 2.9 3.6 * Triglycidyl isocyanurate
Figure imgb0003

WasseraufnahmeWater absorption

Ein Probestreifen wird für 10 Minuten in destilliertes Wasser von 22°C getaucht und anschließend getrocknet. Vor und nach der Trocknung wird der Probestreifen gewogen. Die Gewichtsdifferenz wird bezogen auf die Gelatinemenge, die dieser Probestreifen aufweist. Die Gelatinemenge wird aus der Rezeptur, dem Auftragsgewicht und der Probegröße errechnet. Die Wasseraufnahme wird angegeben in g Wasser/1g Gelatine.A test strip is immersed in distilled water at 22 ° C for 10 minutes and then dried. The test strip is weighed before and after drying. The weight difference is based on the amount of gelatin that this test strip has. The amount of gelatin is calculated from the recipe, the application weight and the sample size. The water absorption is given in g water / 1g gelatin.

KratzfestigkeitScratch resistance

Das zu prüfende Muster wird eine Minute lang in 30°C warmes Wasser gelegt. Danach wird das noch feuchte Muster unter einer Harke hergezogen, deren 6 einzelne Zacken (Zinken) unterschiedlich schwere Gewichte tragen, bis maximmal 100 g. Die Ziehgeschwindigkeit beträgt 0,8 cm/s. Das geprüfte Muster wird getrocknet. Die Kratzspuren zur Sichtbarmachung mit Papierlichtblau angefärbt. Es wird die Anzahl der sichtbaren Kratzspuren (max. 6) angegeben.The sample to be tested is placed in warm water at 30 ° C for one minute. Then the still wet sample is pulled under a rake, the 6 individual prongs (tines) of which have weights of different weights, up to a maximum of 100 g. The pulling speed is 0.8 cm / s. The tested sample is dried. The scratch marks for visualization stained with paper light blue. The number of visible scratch marks (max. 6) is given.

Fotografischer SchleierPhotographic veil

Handelsübliches Colorpapier wird in Kontakt mit der Probe 5 Tage bei 50°C inkubiert, dann zusammen mit einer gleich behandelten Blindprobe fotografisch entwickelt und fixiert und der Schleier gegen den Schleier der Blindprobe ausgewertet, wobei Note 1 keinen Unterschied bedeutet und die Note 5 eine sehr starke Veränderung.Commercial color paper is incubated in contact with the sample for 5 days at 50 ° C, then photographically developed and fixed together with a blind sample treated in the same way and the veil is evaluated against the veil of the blind sample, with grade 1 meaning no difference and grade 5 a very strong one Change.

Prüfergebnisse:Test results:

Beispiele/VergleicheExamples / comparisons WasseraufnahmeWater absorption KratzfestigkeitScratch resistance Fotografischer Schleier NotePhotographic veil touch sofortright away nach 4 Wochenafter 4 weeks sofortright away nach 2 Wochenafter 2 weeks g Wasser/g Gelat.g water / g gelat. Anz.KratzspurenNumber of scratch marks B1B1 2,42.4 2,12.1 55 33rd 3 - 43-4 V1V1 2,72.7 2,42.4 66 44th 3 - 43-4 B2B2 2,42.4 2,02.0 44th 00 33rd V2V2 2,82.8 2,22.2 44th 11 33rd B3B3 2,22.2 1,21.2 11 00 1 - 21 - 2 V3V3 3,13.1 1,71.7 33rd 00 1 - 21 - 2 B4aB4a 2,42.4 0,90.9 66 00 1 - 21 - 2 B4bB4b 2,72.7 0,90.9 66 00 1 - 21 - 2 B4cB4c 2,82.8 0,90.9 66 00 1 - 21 - 2 B5B5 2,32.3 0,90.9 66 00 1 - 21 - 2 B6B6 2,22.2 0,80.8 66 11 2 - 32-3 V4V4 2,32.3 1,61.6 55 11 2 - 32-3

ZusammenfassungSummary

Die Prüfergebnisse zeigen, daß die Werte der Wasseraufnahme und Kratzfestigkeit durch Einsatz der erfindungsgemäßen Gelatine verbessert werden.The test results show that the values of water absorption and scratch resistance are improved by using the gelatin according to the invention.

In Kombination mit dem Härtungsmittel Triglycidylisocyanurat können bei günstigen rheologischen Werten der Beschichtungslösung und in einem weiten pH-Bereich Antirollschichten mit Wasseraufnahme von < 1 g Wasser/g Gelatine erzielt werden.In combination with the hardening agent triglycidyl isocyanurate, anti-roll layers with water absorption of <1 g water / g gelatin can be achieved with favorable rheological values of the coating solution and in a wide pH range.

Claims (9)

Schichtträger für lichtempfindliche Materialien mit einer Antirollschicht auf der Rückseite, mindestens bestehend aus Gelatine und Härtungsmittel, dadurch gekennzeichnet, daß die Antirollschicht als Gelatine eine fermentativ abgebaute reine Knochengelatine enthält.Layer support for light-sensitive materials with an anti-curl layer on the backside, at least consisting of gelatin and a curing agent, characterized in that the anticurl layer contains as gelatin a bone gelatin pure fermentation degraded. Schichtträger nach Anspruch 1, dadurch gekennzeichnet, daß die Gelatine eine Gallertfestigkeit von 200-250 g Bloom und > 40 % niedermolekulare Anteile von Molgewicht < 100.000 besitzt.Layer support according to claim 1, characterized in that the gelatin has a gel strength of 200-250 g Bloom and> 40% low molecular weight portions of molecular weight <100,000. Schichtträger nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Gelatine als 10 Gew.-%ige wäßrige Lösung bei 40°C eine Viskosität von 10 - 20 mPas besitzt und bei 35°C eine Härtbarkeit von 300 - 400 Minuten.Layer support according to Claims 1 and 2, characterized in that the gelatin as a 10% by weight aqueous solution has a viscosity of 10-20 mPas at 40 ° C and a hardenability of 300-400 minutes at 35 ° C. Schichtträger nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Antirollschicht als Härtungsmittel Triglycidylisocyanurat enthält.The support material of claims 1 to 3, characterized in that the anticurl layer contains triglycidyl isocyanurate as a curing agent. Schichtträger nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die Antirollschicht das Härtungsmittel in einer Menge von 0,5 - 12 Gew.-%, bevorzugt 1 - 6 Gew.-%, enthält, bezogen auf die Gelatinemenge.Containing 6 wt .-%, based on the amount of gelatin - support of claim 1 to 4, characterized in that the anti-curl coating the curing agent in an amount of 0.5 - 12 wt .-%, preferably. 1 Schichtträger nach Anspruch 4 und 5, dadurch gekennzeichnet, daß die Antirollschicht ein Wasseraufnahmevermögen von < 1 g Wasser/g Gelatine aufweist, gemessen nach 10 Minuten Einwirkzeit von destilliertem Wasser von 22°C.The support material of claims 4 and 5, characterized in that the anticurl layer has a water uptake capacity of <1 g water has / g gelatin, measured after 10 minutes exposure of distilled water at 22 ° C. Schichtträger nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß die Antirollschicht zusätzlich Netzmittel, Weichmacher, Mattierungsmittel, organische Säuren, Antistatika, Salze und/oder rheologische Hilfsmittel enthält.The support material of claims 1 to 6, characterized in that the anticurl layer also contains wetting agents, plasticizers, matting agents, organic acids, antistatics, salts and / or rheological aids. Schichtträger nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß die Antirollschicht als Weichmacher einen alifatischen Polyalkohol, bevorzugt Ethylenglykol, Glycerin und/oder ein Polyglykol bis Molgewicht 2000 enthält.The support material of claims 1 to 7, characterized in that the anticurl layer as plasticizers an aliphatic polyalcohol, preferably ethylene glycol, glycerin and / or a polyglycol containing up molecular weight 2000th Schichtträger nach Anspruch 1 bis 8, dadurch gekennzeichnet, daß der Weichmacher als alifatischer Polyalkohol in einer Menge von bis zu 50 Gew.-%, bevorzugt 5 - 35 Gew.-%, vorliegt, bezogen auf die Gelatinemenge.Layer support according to Claims 1 to 8, characterized in that the plasticizer is present as aliphatic polyalcohol in an amount of up to 50% by weight, preferably 5-35% by weight, based on the amount of gelatin.
EP19930117767 1992-12-30 1993-11-03 Carrier for photo sensitive material with anti-coiling layer coated on the backside Expired - Lifetime EP0604732B1 (en)

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EP0297240A2 (en) * 1987-07-02 1989-01-04 Felix Schoeller jr Foto- und Spezialpapiere GmbH & Co. KG Process for the fabrication of a support for light sensitive material with an anti-coiling layer
EP0395785A1 (en) * 1989-05-05 1990-11-07 FELIX SCHOELLER JR. GMBH &amp; CO. KG Support for light-sensitive materials with an anti-curling layer coated on the backside

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JPS6022342B2 (en) * 1980-06-02 1985-06-01 富士写真フイルム株式会社 Method for improving adhesion resistance of silver halide photographic materials for printing
JPS59191030A (en) * 1983-04-14 1984-10-30 Mitsubishi Paper Mills Ltd Photographic material for diffusion transfer
EP0514903B1 (en) * 1991-05-22 1998-12-30 Fuji Photo Film Co., Ltd. Silver halide photographic material
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EP0297240A2 (en) * 1987-07-02 1989-01-04 Felix Schoeller jr Foto- und Spezialpapiere GmbH & Co. KG Process for the fabrication of a support for light sensitive material with an anti-coiling layer
EP0395785A1 (en) * 1989-05-05 1990-11-07 FELIX SCHOELLER JR. GMBH &amp; CO. KG Support for light-sensitive materials with an anti-curling layer coated on the backside

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