EP0052735B1 - Weisser fotografischer Papierträger und Verfahren zu seiner Herstellung - Google Patents

Weisser fotografischer Papierträger und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0052735B1
EP0052735B1 EP81108099A EP81108099A EP0052735B1 EP 0052735 B1 EP0052735 B1 EP 0052735B1 EP 81108099 A EP81108099 A EP 81108099A EP 81108099 A EP81108099 A EP 81108099A EP 0052735 B1 EP0052735 B1 EP 0052735B1
Authority
EP
European Patent Office
Prior art keywords
alkaline earth
earth metal
base material
film base
photographic film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81108099A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0052735A1 (de
Inventor
Rudolf Dr.-Ing. Wanka
Heinz Dipl.-Ing. Wilke
Wolfram Wysk
Uwe Jensen
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
Felex Schoeller Jr and GmbH and Co KG
Original Assignee
Felix Schoeller Jr Foto und Spezialpapiere GmbH
Felex Schoeller Jr and GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Felix Schoeller Jr Foto und Spezialpapiere GmbH, Felex Schoeller Jr and GmbH and Co KG filed Critical Felix Schoeller Jr Foto und Spezialpapiere GmbH
Priority to AT81108099T priority Critical patent/ATE11835T1/de
Publication of EP0052735A1 publication Critical patent/EP0052735A1/de
Application granted granted Critical
Publication of EP0052735B1 publication Critical patent/EP0052735B1/de
Expired legal-status Critical Current

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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
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/258—Alkali metal or alkaline earth metal or compound thereof
    • 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
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • Y10T428/31899—Addition polymer of hydrocarbon[s] only
    • Y10T428/31902—Monoethylenically unsaturated

Definitions

  • the invention relates to a photographic support material consisting of paper and at least one titanium dioxide arranged on the paper in an amount between 10 and 20% by weight and optionally containing polyolefin layer containing color pigments and / or optionally optical brighteners, and to a method for producing a photographic support material.
  • Waterproof photographic papers consist of a paper carrier with synthetic resin films applied on both sides and a light-sensitive coating consisting of one or more layers based on silver salts on one of the synthetic resin surfaces.
  • the synthetic resin films lying on the base paper can, according to DE-B-1 447 815, be made of polyolefin, e.g. As polyethylene, exist and are layered on the paper by means of extrusion coating.
  • polyolefin e.g. As polyethylene
  • the synthetic resin film (front coating) arranged under the light-sensitive layers usually contains light-reflecting white pigment and optionally shading dyes, optical brighteners and / or other additives, such as lubricants and antistatic compounds.
  • the synthetic resin film (back coating) arranged on the back can be pigmented or pigment-free and / or contain other additives which result from the respective use of the laminate as a photographic support.
  • the most important component in the front coating between the base paper and light-sensitive layers is the light-reflecting white pigment in addition to the hydrophobic synthetic resin binder.
  • This white pigment is not only decisive for the visual impression of a photographic image, but also for the imaging quality and the durability of the photographic image produced in the adjacent photographic layers.
  • US-A-3 833 380 describes a rutile titanium dioxide as white pigment in a polyethylene layer because the UV light absorption of the rutile, which is known per se, has proven to be advantageous for the durability of color photographic images.
  • DE-A-2 529 989 proposes the use of a special anatase titanium dioxide surface-treated with alumina hydrate because the whiteness is higher than that of the common rutile titanium dioxide according to US Pat. No. 3,833,380. And in US Pat. No. 4,185,480 the combined use of rutile titanium dioxide with anatase titanium dioxide is proposed because such a mixture advantageously combines the opacity, lightfastness and image sharpness inherent in the rutile with the higher whiteness inherent in the anatase and better compatibility with optical brighteners.
  • DE-A-2 654 220 proposes e.g. B. the use of 5-40% calcium carbonate as white pigment, which leads to a reduction in production, due to its small particle diameter of less than 0.4 f.lm improve the surface properties and should make a special, the adhesion of photographic layers surface treatment superfluous.
  • red or violet pigments are optionally mixed together with blue pigment into the polyolefin containing titanium dioxide.
  • the titanium dioxide can also be replaced by other white pigments or combined with other white pigments. Precise information on how this is to be done cannot be found in this published specification.
  • optical brighteners such as 2,5-di- (5-tert.butyl-benzoxazolyl-2 ') thiophene for pigmented image carrier layer has long been known.
  • the pigmented and optionally nuanced and / or lightened white front layer applied by means of extrusion coating is usually surface-treated after it has solidified in order to ensure that photographic layers arranged thereon adhere well despite the hydrophobic nature of the synthetic resin.
  • the corona treatment of the hydrophobic surface described in DE-A-1 447 611 is preferably used.
  • a disadvantage of the pigmented front layers composed according to the prior art described is first of all that all the white pigments described, with the exception of the calcium carbonate used in DE-A-2 654 220, promote the degradation of the polyolefinic synthetic resin binder.
  • degradation products cause severe corrosion on the die lips after just a few days to a maximum of 2 weeks. It is therefore necessary to regrind them at short intervals, otherwise the profile of the coating applied from the melt will become uneven and, in extreme cases, the surface will become contaminated.
  • the object of the invention is therefore to provide a waterproof white photographic paper support which has the opacity and whiteness of a material coated with titanium dioxide in polyolefin, but avoids the disadvantages of this mixing system.
  • the polyolefin layer additionally contains 0.1-5% by weight of an alkaline earth metal carbonate and / or 0.2-10% by weight of an alkaline earth metal oxide.
  • Oxides and carbonates of calcium or magnesium are preferred, but the corresponding compounds of strontium and barium are also suitable as additives according to the invention for polyolefin coating compositions containing titanium dioxide for the extrusion coating of photographic papers.
  • the paper base to be coated with a pigmented and stabilized polyolefin mixture according to the invention can be any photographic base paper which is either neutral sized using alkyl ketene dimer or has a known acidic size based on precipitated resin soaps, fatty acid soaps or fatty acid anhydrides.
  • the base papers preferably also carry a sealing and / or adhesion-imparting surface sizing made from water-soluble or water-dispersible substances.
  • the surface coating can contain antistatically active substances and, if appropriate, pigments and / or hydrophobizing additives and / or coloring additives.
  • the base paper can be made exclusively from cellulose fibers or from mixtures of cellulose fibers with synthetic fibers. It can have a basis weight of 60-300 g / m z (preferably 70-200 g / m 2).
  • the pigment-containing polyolefin coating composition can be applied to one or both sides of the paper. It consists essentially of a polyolefin, a titanium dioxide and the addition of an alkaline earth metal carbonate or oxide according to the invention. It can optionally contain optical brighteners and / or shading dyes and / or antioxidants and / or lubricants and is applied by means of extrusion coating at conventional temperatures of 280 to 330 ° C.
  • the polyolefin is preferably polyethylene. Both high density and low density polyethylene can be used.
  • the polyolefin resin can also be an ethylene copolymer or polypropylene.
  • a photographic base paper weighing approx. 130 g / m 2 was coated with approx. 30 g / m 2 of a pigmented synthetic resin mixture on the front by means of extrusion coating.
  • the composition of the mixture was
  • the back was made with a mixture of about 30 g / m 2 overdrawn.
  • a photographic base paper weighing approximately 130 g / m 2 was coated on both sides as in Example 2, with the difference that the front coating contained 0.5% by weight of strontium carbonate instead of magnesium carbonate.
  • a photographic base paper weighing approximately 130 g / m 2 was coated on both sides as in Example 2, with the difference that the front coating contained 0.5% by weight of calcium oxide instead of magnesium carbonate.
  • the back was coated with about 20 g / m 2 of the same polyethylene mixture as in Example 1.
  • the back was coated with about 15 g / m 2 of the same polyethylene mixture as in Example 1.
  • Examples 7 to 18 As comparisons to the resin-coated photographic paper supports described in Examples 1 to 6, corresponding coated paper supports were produced as Examples 7 to 18, which differed from the examples according to the invention only in that the pigmented coating mixture on the front was free from that contained in Examples 1 to 6 Alkaline earth metal oxide or alkaline earth metal carbonate.
  • coated carrier materials were compared both with regard to their different running behavior in the extrusion coating and with regard to the homogeneity of the coloring of the front layer, and after a conventional corona treatment of the surface they were coated with a light-sensitive silver halide layer and processed into photographic images. The photographic images were compared for sharpness.
  • Table 2 summarizes the main results of the tests. This clearly results in the superior quality of the coated photographic base papers produced according to the invention using mixtures of titanium dioxide with alkaline earth oxides or alkaline earth carbonates.
  • FIGS. 1 to 3 shows white photographic support materials of the invention in various configurations.
  • the reference numeral 1 designates the paper
  • the reference numeral 2 the coating consisting of a polyolefin according to the invention, which is designed according to Examples 1 to 6.
  • the reference number 3 is an adhesion-promoting layer, optionally with additives such as a brightener
  • the reference number 4 denotes the light-sensitive layer or layers
  • the reference number 5 also the back coating made of a polyolefin, which can be transparent or pigmented, for example with carbon black.
  • the reference numeral 6 is a back stroke to make the photographic paper writable and / or to provide it with an antistatic finish.
  • a primer 7 is provided between the polyolefin layer and the paper, which is applied directly to the paper to give it additional smoothing or to serve as an adhesion promoter.
  • the reference numeral 8 is a backside coating, which serves here as an anti-curl layer, that is to prevent curling of the paper.

Landscapes

  • 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)
EP81108099A 1980-11-21 1981-10-09 Weisser fotografischer Papierträger und Verfahren zu seiner Herstellung Expired EP0052735B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108099T ATE11835T1 (de) 1980-11-21 1981-10-09 Weisser fotografischer papiertraeger und verfahren zu seiner herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803043864 DE3043864A1 (de) 1980-11-21 1980-11-21 Weisser fotografischer papiertraeger und verfahren zu seiner herstellung
DE3043864 1980-11-21

Publications (2)

Publication Number Publication Date
EP0052735A1 EP0052735A1 (de) 1982-06-02
EP0052735B1 true EP0052735B1 (de) 1985-02-13

Family

ID=6117244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108099A Expired EP0052735B1 (de) 1980-11-21 1981-10-09 Weisser fotografischer Papierträger und Verfahren zu seiner Herstellung

Country Status (5)

Country Link
US (1) US4396671A (enrdf_load_stackoverflow)
EP (1) EP0052735B1 (enrdf_load_stackoverflow)
JP (1) JPS57116339A (enrdf_load_stackoverflow)
AT (1) ATE11835T1 (enrdf_load_stackoverflow)
DE (1) DE3043864A1 (enrdf_load_stackoverflow)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328463A1 (de) * 1983-08-06 1985-02-21 Felix Schoeller jr. GmbH & Co KG, 4500 Osnabrück Fotografischer papiertraeger
US4710186A (en) * 1984-07-20 1987-12-01 Personal Products Company Clean and dry appearance facing
DE3435639A1 (de) * 1984-09-28 1986-04-10 Felix Schoeller jr. GmbH & Co KG, 4500 Osnabrück Fotografisches traegermaterial fuer schwarz/weiss- und farbfotografie
US4859539A (en) * 1987-03-23 1989-08-22 Eastman Kodak Company Optically brightened polyolefin coated paper support
US4794071A (en) * 1987-03-23 1988-12-27 Eastman Kodak Company Optically brightened photographic silver halide element with a polyolefin paper coated support
GB2217866B (en) * 1988-04-15 1992-02-12 Oji Paper Co Thermal transfer image-receiving sheet
US5178936A (en) * 1989-05-23 1993-01-12 Oji Paper Co., Ltd. Support sheet for photographic printing sheet
US5058531A (en) * 1989-06-03 1991-10-22 Akins Edward A Feeder for animals
EP0492887B1 (en) * 1990-12-21 1997-08-27 Oji Paper Co., Ltd. Support sheet for photographic printing sheet
US5374508A (en) * 1990-12-21 1994-12-20 New Oji Paper Co., Ltd. Support sheet for photographic printing sheet
US5470652A (en) * 1991-10-03 1995-11-28 Oji Paper Co., Ltd Support sheet for photographic printing paper and process for producing the sheet
JPH05269941A (ja) * 1992-01-27 1993-10-19 Mitsubishi Paper Mills Ltd 樹脂被覆紙
US5262286A (en) * 1992-07-31 1993-11-16 Eastman Kodak Company Reduction of yellow stain in photographic prints
GB2279961A (en) * 1993-06-22 1995-01-18 Ici Plc Paint containing white opacifier
GB2280191A (en) * 1993-06-22 1995-01-25 Ici Plc Paint containing white opacifier
WO2012105944A1 (en) 2011-01-31 2012-08-09 Hewlett-Packard Development Company, L.P. Electrophotographic recording media

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE622442A (enrdf_load_stackoverflow) 1961-09-18
NL290497A (enrdf_load_stackoverflow) 1962-03-21
GB971058A (enrdf_load_stackoverflow) 1962-05-02 1900-01-01
JPS4927046B1 (enrdf_load_stackoverflow) * 1965-04-12 1974-07-15
JPS594447B2 (ja) * 1972-12-28 1984-01-30 日石三菱株式会社 合成紙
DE2326759C2 (de) 1973-05-25 1984-03-08 Felix Schoeller jr. GmbH & Co KG, 4500 Osnabrück Mit thermoplastischen Kunstharzen beschichtetes, wasserfestes, fotografisches Papier
GB1463340A (en) * 1973-11-15 1977-02-02 Rhone Progil Coating of paper cardboard and the like
JPS516531A (ja) 1974-07-04 1976-01-20 Fuji Photo Film Co Ltd Ingashoshijitai
JPS53117A (en) * 1976-06-24 1978-01-05 Mitsubishi Paper Mills Ltd Photographic paper support
JPS5319021A (en) * 1976-08-04 1978-02-21 Fuji Photo Film Co Ltd Substrate for photography
DE2654220A1 (de) * 1976-11-30 1978-06-01 Solvay Werke Gmbh Verfahren zur herstellung eines mit polyolefin beschichteten fotografischen papiers
JPS555830A (en) * 1978-06-28 1980-01-17 Fuji Photo Film Co Ltd Ink jet type recording sheet
US4265960A (en) * 1978-12-26 1981-05-05 Mobil Oil Corporation Films produced from LDPE encapsulated CaCO3
JPS5942296B2 (ja) * 1980-08-01 1984-10-13 三菱製紙株式会社 写真用支持体の製法

Also Published As

Publication number Publication date
DE3043864A1 (de) 1982-07-08
JPS57116339A (en) 1982-07-20
DE3043864C2 (enrdf_load_stackoverflow) 1987-09-10
EP0052735A1 (de) 1982-06-02
US4396671A (en) 1983-08-02
ATE11835T1 (de) 1985-02-15

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