US3787214A - Process for undercoating a support of photographic material - Google Patents

Process for undercoating a support of photographic material Download PDF

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Publication number
US3787214A
US3787214A US00183656A US3787214DA US3787214A US 3787214 A US3787214 A US 3787214A US 00183656 A US00183656 A US 00183656A US 3787214D A US3787214D A US 3787214DA US 3787214 A US3787214 A US 3787214A
Authority
US
United States
Prior art keywords
support
polyolefin
undercoat layer
photographic material
photographic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00183656A
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English (en)
Inventor
N Minagawa
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of US3787214A publication Critical patent/US3787214A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03C1/91—Photosensitive materials characterised by the base or auxiliary layers characterised by subbing layers or subbing 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
    • Y10S430/136—Coating process making radiation sensitive element

Definitions

  • ABSTRACT A process for undercoating a support of a photographic material comprising providing an undercoat layer containing gelatin and a basic substance, such as sodium hydroxide, on an activated surface of a support comprising a polyolefin film or a polyolefin-coated film, said basic substance being included therein so as to maintain the hydrogen ion concentration (pl-l) of the surface of theundercoat layer at a level of from 6.6 to 9.5.
  • a photographic emulsion adheres firmly to the undercoated surface of the sup-' port with a markedly increased bond strength.
  • a polyolefin surface is chemically inert, and therefore, when a photographic emulsion is directly coated on such a surface, the support does not adhere at all to the photographic emulsion layer. Accordingly, it has previously been the practice to subject such a polyolefin surface to an activating treatment such as a coronadischarge treatment, or a flame treatment, before applying a photographic emulsion layer to the surface.
  • an activating treatment such as a coronadischarge treatment, or a flame treatment
  • the support used in this invention is a polyolefin film or a polyolefin-coated film obtained by coating at least one surface of a support made of a material such as paper, cellophane, cellulose acetate or polyester, with a polyolefin.
  • polyolefin as used in the present specification, is meant polyethylene, polypropylene or mixtures thereof.
  • the polyolefin film is obtained by an ordinary film-forming method such as the tubular film method, or flat die method.
  • the polyolefin-coated film is obtained by the extrusion coating method or the adhering method using an adhesive.
  • the undercoat layer in the present invention consists essentially of gelatin.
  • the undercoat layer is prepared by coating an aqueous solution of gelatin or a dispersion of an aqueous gelatin solution in an organic solvent compatible with water, onto the surface of a polyolefin support which has been subjected to the activating treatment.
  • the gelatin solution preferably has a concentration of from 0.1 to 15 percent by weight.
  • Suitable activating treatments can be employed depending on the characteristics desired.
  • An example of a suitable activating treatment is disclosed in Tappi, Volume 48, No. 9; September, 1965; pps. -84.
  • the pH adjustment of the surface of the undercoat layer is effected by adding any water-soluble hydrophilic basic substance to the under-coat solution.
  • typical basic substances include sodium hydroxide, potassium hydroxide, sodium carbonate, and sodium bicarbonate, although it is to be expressly understood that any hydrophilic basic substance which performs the function of adjusting the pH to from 6.6 to 9.5, is operable.
  • the polyolefin film or coating of the support preferably has a thickness of from about 10 to microns and the undercoat layer preferably has a thickness of from about 0.01 to 10 microns.
  • the undercoat layer can have incorporated therein up to about 30 percent by weight of a low molecular weight carboxylic acid, such as, for example, formic acid, propionic acid, acrylic acid or salicylic acid.
  • a low molecular weight carboxylic acid such as, for example, formic acid, propionic acid, acrylic acid or salicylic acid.
  • the acid is added to the layer in order to stabilize the colloidal gelatin in the non-soluble liquid medium.
  • the measurement of the pH of the undercoat surface was made by a color test using a litmus solution and a color test using a paper surface pH measuring solution (product of Kabushiki Kaisha Kyoritsu Rikagaku Ken kyusho).
  • the bond strength between the support and the photographic emulsion layer was measured as follows:
  • One scratch i.e., score
  • the bond strength was evaluated as good.
  • Table 1 onto which a photographic emulsion was to be coated were subjected to a corona discharge treatment using a corona discharge apparatus of the type shown in Example l, and then immediately coated with separate undercoating solutions of the formulations Nos. 5 and Formulation No. 5
  • Bond Strength Formulation pH values of Dry state (per- Wet state of the underthe undercentage of (maximum width coating coated unpeeled emulsion of the peeled solution surface layer) emulsion layer) No. 1 6.2 75-85% 2 3 mm No. 2 6.6 95-100% 0 mm
  • EXAMPLE 2 Water 300 cc Different portions of one surface of a crystalline Methanol 700 cc polypropylene film having a thickness of 150 microns F l ti n N0, 6; were flame treated with a gaseous mixture of propane G l 75 and oxygen, and then immediately coated with separate d g 7 5 undercoating solutions, each of the following formulag g g fiy g tions, Nos. 3 and followed by drying.
  • a photographic material comprising a support selected from the group consisting of a polyolefin support and a polyolefin-coated support, the surface of said support being activated, having coated thereon an undercoat layer consisting essentially of gelatin and a hydrophilic basic substance present in an amount sufficient to provide the surface of the undercoat layer with a pH of from 6.6 to.9.5 and a photographic emulsion coated onto said undercoat layer.
  • the photographic material of claim 1 wherein the polyolefin is polyethylene, polypropylene or a mixture Table 3 Bond strength Formulation pH values of Dry state Wet state of the underthe under- (percentage of (maximum width coating coated unpeeled emulof the peeled solution surface sion layer) emulsion layer) No.5 5.2 70 75% i5 20 mm No.6 9.5 95 100% 0 mm 5.
  • the photographic material of claim 1 wherein the thickness of said undercoat layer is from about 0.01 to 10 microns.
  • a process for producing a photographic material comprising providing an undercoat layer consisting essentially of gelatin and a hydrophilic basic substance on an activated surface of a support selected from the group consisting of a polyolefin support and a polyolefin-coated support, said hydrophilic basic substance being included to maintain the pH of the surface of the undercoat layer at a level of from 6.6 to 9.5, and coating a photographic light-sensitive emulsion onto said undercoat layer.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Laminated Bodies (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
US00183656A 1970-09-24 1971-09-24 Process for undercoating a support of photographic material Expired - Lifetime US3787214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45083649A JPS4917522B1 (enrdf_load_stackoverflow) 1970-09-24 1970-09-24

Publications (1)

Publication Number Publication Date
US3787214A true US3787214A (en) 1974-01-22

Family

ID=13808286

Family Applications (1)

Application Number Title Priority Date Filing Date
US00183656A Expired - Lifetime US3787214A (en) 1970-09-24 1971-09-24 Process for undercoating a support of photographic material

Country Status (6)

Country Link
US (1) US3787214A (enrdf_load_stackoverflow)
JP (1) JPS4917522B1 (enrdf_load_stackoverflow)
CA (1) CA980638A (enrdf_load_stackoverflow)
DE (1) DE2147583A1 (enrdf_load_stackoverflow)
FR (1) FR2107638A5 (enrdf_load_stackoverflow)
GB (1) GB1302139A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042398A (en) * 1975-10-20 1977-08-16 Schoeller Technical Papers, Inc. Polyolefin coated photographic base and method of producing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3400125C2 (de) * 1984-01-04 1986-01-23 Felix Schoeller jr. GmbH & Co KG, 4500 Osnabrück Verfahren zur Herstellung Photographischer Papierträger
JPS63168109A (ja) * 1987-01-06 1988-07-12 株式会社　サンキツト 押入収納の組立家具セツトおよびその施工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123492A (en) * 1962-02-28 1964-03-03 Maffet
US3161519A (en) * 1961-06-14 1964-12-15 Eastman Kodak Co Non-pigmented white coating
US3320191A (en) * 1961-01-05 1967-05-16 Eastman Kodak Co Sub coatings for bonding photographic emulsions to resinous supports
GB1134211A (en) * 1964-11-17 1968-11-20 Wiggins Teape Res Dev Improvements in or relating to photographic materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320191A (en) * 1961-01-05 1967-05-16 Eastman Kodak Co Sub coatings for bonding photographic emulsions to resinous supports
US3161519A (en) * 1961-06-14 1964-12-15 Eastman Kodak Co Non-pigmented white coating
US3123492A (en) * 1962-02-28 1964-03-03 Maffet
GB1134211A (en) * 1964-11-17 1968-11-20 Wiggins Teape Res Dev Improvements in or relating to photographic materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042398A (en) * 1975-10-20 1977-08-16 Schoeller Technical Papers, Inc. Polyolefin coated photographic base and method of producing

Also Published As

Publication number Publication date
FR2107638A5 (enrdf_load_stackoverflow) 1972-05-05
JPS4917522B1 (enrdf_load_stackoverflow) 1974-05-01
GB1302139A (enrdf_load_stackoverflow) 1973-01-04
CA980638A (en) 1975-12-30
DE2147583A1 (de) 1972-04-13

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