US3631514A - Recording film having removable antistatic layer - Google Patents

Recording film having removable antistatic layer Download PDF

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Publication number
US3631514A
US3631514A US26807A US3631514DA US3631514A US 3631514 A US3631514 A US 3631514A US 26807 A US26807 A US 26807A US 3631514D A US3631514D A US 3631514DA US 3631514 A US3631514 A US 3631514A
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US
United States
Prior art keywords
layer
acid
film
polymer
image
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
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US26807A
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English (en)
Inventor
Edward William Lee
Frank Percy Lambert
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.)
Ilford Imaging UK Ltd
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Ilford 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.)
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Publication date
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Publication of US3631514A publication Critical patent/US3631514A/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
    • G03C1/85—Photosensitive materials characterised by the base or auxiliary layers characterised by antistatic additives or coatings
    • G03C1/89—Macromolecular substances therefor
    • 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
    • Y10S430/143—Electron beam

Definitions

  • a difficulty which arises is that the effect of electrons falling on the emulsion is usually not only to form the desired image but also to charge the emulsion negatively. An emulsion so charged will of course tend to repel electrons moving towards it and it is accordingly necessary to conduct the charge away. Hitherto it has been proposed to do this in the conventional way by providing a backing to the film of a so-called antistatic material. A very wide variety of such antistatic materials have been described for use in the production of photographic materials.
  • an image-recording film comprising a film support and a silver halide emulsion layer thereon, characterized in that there is provided in superposition on the emulsion side of the assembly a water-or alkali-soluble or-dispersible layer and, as the outer layer, a layer of acid-reacting polymer having dispersed therein an acid-reacting carbon black.
  • the carbon black layer acts as an antistatic layer and should preferably have a resistivity not greater than ohms/square.
  • a suitable first, or supercoat, layer is one applied from an aqueous solution of a water-soluble polymer.
  • Suitable materials for the purpose are the water-soluble cellulose ethers, e.g. cellulose hydroxyethyl ether (for instance as sold under the Registered Trademark NATROSOL) or cellulose hydroxypropyl ether (for instance as sold under the Registered Trademark KLUCEL) or other water-soluble cellulose derivatives such as the sodium salt of carboxymethyl cellulose, or water-soluble vinyl polymers such as polyvinyl alcohol and polyvinyl alcohol ethers such as the hydroxy ethyl ether of polyvinyl alcohol, or water-soluble carbohydrate materials such as the synthetic sucrose product sold under the Registered Trademark FICOLL.
  • water-soluble cellulose ethers e.g. cellulose hydroxyethyl ether (for instance as sold under the Registered Trademark NATROSOL) or cellulose hydroxypropyl ether (for instance as sold under the Registered Trademark KLUCEL
  • the supercoating composition may contain a wetting agent of conventional type.
  • the carbon black coating is preferably one made by the use of an acid-reacting channel black; a very suitable carbon black is that sold under the name DEGUSSA 1,000 V.
  • the medium in which the carbon black is dispersed may be any acidic polymer medium known per se from the literature for the dispersion of carbon black in the production of a carbon-black antistatic layer.
  • the polymer medium for the carbon black is preferably a polymer mixture of which the elements have been selected to afford a final polymer layer of good mechanical properties, in which the carbon black is well dispersed and which is inert to the photographic emulsion.
  • nitrated polymers may have some effect on the photographic emulsion it is preferred to dilute such a polymer with an inert polymer, so that, for example, the proportion of nitrated polymer in the total polymer is not more than 30 percent by weight, preferably 10 to 30 percent by weight.
  • the diluent polymer may be any inert polymer but it has been found desirably to include in it a copolymer of methyl methacrylate and methacrylic acid (or other acrylic polymer containing free acid groups) and a proportion of a relatively hard polymer to provide adequate abrasion resistance to the final coating.
  • a suitable relatively hard polymer is, for example, the condensation product of p-hydroxybenzoic acid and dimethylol cresol.
  • a suitable organic solvent medium may be employed including for example, methyl ethyl ketone, methanol, methyl cellosolve or toluene or mixtures of these,
  • the image-recording film of the present invention after imagewise exposure to radiation which can penetrate the carbon black layer and form a latent image in the silver halide, may be processed conventionally or by specific procedure designed to afford particular image characteristics of density and contrast.
  • the carbon black layer may be removed by an initial treatment with water or dilute alkali which will dissolve the interlayer and thus remove both the interlayer and the carbon black layer. Alternatively these layers will be removed automatically during the normal alkaline development procedure.
  • the film of this invention may be exposed by an actinic radiation which will penetrate the carbon black coating it is of the greatest importance in connection with electron beam recording. According, therefore, to another aspect of the present invention there is provided a process for the production of an image record which comprises exposing to electron beam radiation an image-recording film as hereinbefore defined, processing the silver halide emulsion of said film to form a visible image and removing the carbon black layer therefrom.
  • the nitrostyrene/acrylic acid resin has a acid value of about 300 mg.
  • KOH/gm. methylmethacrylate and methacrylic acid copolymer has an acid value of about 150 mg. KOH/gm.
  • the p-hydroxy benzoic acid condensate contains two mol of acid and 1 mol cresol and has an acid value of about 300 mg. KOH/gm.
  • a recording film is prepared comprising a film base bearing a gelatino silver halide emulsion designed for electron beam recording.
  • the emulsion layer is coated with two successive layers as follows:
  • the ethanol is included to increase the drying rate of the layer but where this is not important it can be replaced by an equivalent amount of distilled water).
  • Second layer Coating composition Carbon black (Degussa L000 v.) l.37% Copolymer of nitrostyrene and acrylic acid 0.84% Copolymer of methyl methacrylate and methacrylic acid l.88% Condensation product of p-hydroxybenzoic acid and dimethylol cresol 0.47% Methanol 44.2% Methyl ethyl ketone 43.0% Methyl cellosolvc 7.3% Toluene 0.4%
  • a recording film is prepared comprising a film base bearing a gelatino silver halide designed for electron beam recording.
  • the emulsion layer is coated with two successive layers as follows:
  • a recording film is prepared comprising a film base bearing a gelatino silver halide emulsion designed for electron beam recording.
  • the emulsion layer is coated with two successive layers as follows:
  • First layer Coating com position Sodium salt of carboxymcthyl cellulose 02 g.
  • Second layer Coating composition Carbon black (Degussa L000 v.) 0.7 g. Copolymer ol' nitrostyrene and acrylic acid 0.7l g. Copolymer of methacrylate and acrylic acid L6 g Condensation products of p-hydroxybenzoic acid and dimethylolcrcsol 0.4 3. Methyl ethyl kctone 45.2 ml. Methyl cellosolve 6.4 ml. Toluene 0.4 ml.
  • a film provided with coating as aforesaid is found to be of greatly improved value for electron beam recording since the difficulties arising from the charging of the emulsion layer are wholly or very largely eliminated.
  • the recording films of the present invention may if desired also have a second antistatic layer on the back (i.e. the film side) of the film.
  • a second antistatic layer on the back (i.e. the film side) of the film.
  • This can be of any conventional type but is conveniently of the same type as the carbon black layer used for the emulsion side of the film. In that event it is preferably itself supercoated with a polymer layer, e.g. any of the polymers referred to above.
  • supercoated polymer layer may carry a very thin wax coating to lubricate the film.
  • the present invention includes not only the new recording films herein set forth but also the methods for their production and the methods of electron beam recording using the same.
  • An image-recording film comprising a film support and a silver halide emulsion layer thereon, characterized in that there is provided in superposition on the emulsion side of the assembly a layer of an alkali metal salt of carboxy methyl cellulose and, as the outer layer, a layer of acid-reacting polymer having dispersed therein an acid-reacting carbon black, the acid reacting polymer being a polymer mixture containing 10 to 30 percent by weight of a copolymer of a monomer selected from the class consisting of nitrostyrene and nitro vinyl toluene, with an ethylenically unsaturated monomer copolymerizable therewith.
  • An image-recording film according to claim 1 wherein the acid reacting polymer comprises 10 to 30 percent by weight of a copolymer of nitrostyrene and acrylic acid.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US26807A 1969-04-14 1970-04-08 Recording film having removable antistatic layer Expired - Lifetime US3631514A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1893369 1969-04-14

Publications (1)

Publication Number Publication Date
US3631514A true US3631514A (en) 1971-12-28

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US26807A Expired - Lifetime US3631514A (en) 1969-04-14 1970-04-08 Recording film having removable antistatic layer

Country Status (7)

Country Link
US (1) US3631514A (enrdf_load_stackoverflow)
BE (1) BE748950A (enrdf_load_stackoverflow)
CH (1) CH527438A (enrdf_load_stackoverflow)
DE (1) DE2017653A1 (enrdf_load_stackoverflow)
FR (1) FR2043285A5 (enrdf_load_stackoverflow)
GB (1) GB1239350A (enrdf_load_stackoverflow)
NL (1) NL7005258A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3689768A (en) * 1970-06-18 1972-09-05 Masamichi Sato Electron beam recording materials
US4071648A (en) * 1974-07-19 1978-01-31 Xonics, Inc. Electron radiograph receptor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1942852A (en) * 1931-02-16 1934-01-09 Eastman Kodak Co Nonhalation backing for photographic film
US2976168A (en) * 1959-03-06 1961-03-21 Eastman Kodak Co Method of applying antihalation layers to polyester film
US3062649A (en) * 1958-08-26 1962-11-06 Eastman Kodak Co Photographic film with antistatic layer
US3331076A (en) * 1964-12-28 1967-07-11 Minnesota Mining & Mfg Method and medium for electron beam recording
US3336596A (en) * 1964-12-28 1967-08-15 Minnesota Mining & Mfg Medium for electron beam recording
US3510348A (en) * 1966-03-11 1970-05-05 Eastman Kodak Co Direct positive recording film
US3514291A (en) * 1966-10-04 1970-05-26 Agfa Gevaert Nv Process for reducing the tendency of electrostatic charging of photographic material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1942852A (en) * 1931-02-16 1934-01-09 Eastman Kodak Co Nonhalation backing for photographic film
US3062649A (en) * 1958-08-26 1962-11-06 Eastman Kodak Co Photographic film with antistatic layer
US2976168A (en) * 1959-03-06 1961-03-21 Eastman Kodak Co Method of applying antihalation layers to polyester film
US3331076A (en) * 1964-12-28 1967-07-11 Minnesota Mining & Mfg Method and medium for electron beam recording
US3336596A (en) * 1964-12-28 1967-08-15 Minnesota Mining & Mfg Medium for electron beam recording
US3510348A (en) * 1966-03-11 1970-05-05 Eastman Kodak Co Direct positive recording film
US3514291A (en) * 1966-10-04 1970-05-26 Agfa Gevaert Nv Process for reducing the tendency of electrostatic charging of photographic material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3689768A (en) * 1970-06-18 1972-09-05 Masamichi Sato Electron beam recording materials
US4071648A (en) * 1974-07-19 1978-01-31 Xonics, Inc. Electron radiograph receptor

Also Published As

Publication number Publication date
DE2017653A1 (de) 1970-10-15
FR2043285A5 (enrdf_load_stackoverflow) 1971-02-12
CH527438A (de) 1972-08-31
BE748950A (fr) 1970-09-16
NL7005258A (enrdf_load_stackoverflow) 1970-10-16
GB1239350A (enrdf_load_stackoverflow) 1971-07-14

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