EP0030974A1 - Structure photographique composite - Google Patents

Structure photographique composite

Info

Publication number
EP0030974A1
EP0030974A1 EP80901439A EP80901439A EP0030974A1 EP 0030974 A1 EP0030974 A1 EP 0030974A1 EP 80901439 A EP80901439 A EP 80901439A EP 80901439 A EP80901439 A EP 80901439A EP 0030974 A1 EP0030974 A1 EP 0030974A1
Authority
EP
European Patent Office
Prior art keywords
photographic
light
adhesive
substrate
sensitive element
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.)
Withdrawn
Application number
EP80901439A
Other languages
German (de)
English (en)
Other versions
EP0030974A4 (fr
Inventor
Harry A. Loder
Charles A. Mathna
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP0030974A1 publication Critical patent/EP0030974A1/fr
Publication of EP0030974A4 publication Critical patent/EP0030974A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/08—Fastening or securing by means not forming part of the material of the label itself
    • G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
    • 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
    • G03C11/00—Auxiliary processes in photography
    • G03C11/12—Stripping or transferring intact photographic layers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0208—Indicia
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0208—Indicia
    • G09F2003/021—Indicia behind the front foil
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0225—Carrier web
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0225—Carrier web
    • G09F2003/0226—Carrier sheet
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0225—Carrier web
    • G09F2003/0229—Carrier roll
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/023—Adhesive
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/023—Adhesive
    • G09F2003/0241—Repositionable or pressure sensitive adhesive

Definitions

  • This invention relates to composite photographic structures, especially to structures having utility in the transfer of photographic images to substrates.
  • Photographic images may be applied to leather, fabric or other substrates in a variety of ways.
  • a photographic emulsion containing silver halide particles can be brushed or otherwise applied to a canvas backing under controlled light conditions, exposed to imaging radiation through a photographic negative, and the thusexposed emulsion layer subjected to developing solutions to yield a positive image. While this technique can be performed with a single coating to yield a black-and-white image, individual handling procedures greatly increase the cost; further, the preparation of colored images is not practical .
  • the production of colored photographs on a canvas backing offers an attractive way to simulate an expensive portrait done in oil, and various techniques have been employed to achieve this effect.
  • three photographic emulsion layers may be prepared on a conventional backing, each such layer thereafter exposed to imaging radiation through a mask of a different primary color (cyan, magenta or yellow), and the emulsion layers developed and transferred in turn to the desired substrate, making certain that the three imaged layers are in register.
  • a mask of a different primary color cyan, magenta or yellow
  • Great care is required in handling the individual emulsion layers, and it is extremely difficult to obtain high quality results, especially if the substrate is irregular or textured.
  • the most popular way of transferring a colored photographic image to a canvas or other substrate involved a process known as photo paper stripping.
  • This process utilizes a curl-resi stant commercially available photographic print paper which has a thin polyethylene foil laminated to each major face, the photographic emulsion layers being coated over one of the foil surfaces.
  • a colored photographic image is developed in the emulsion layers and the opposite surface temporarily adhered to a supporting substrate.
  • the paper backing is then split as close to the papercontacting face of the emulsion-coated polyethylene foil, the foil and developed image being carefully removed by rolling them around a small cylindrical dowel .
  • the removed polyethylene foil bearing the developed emulsion layers on one face, is then adhered to the desired substrate and subjected to pressure to conform it intimately thereto. Not only is the splitting process difficult, but the rolled emulsion-bearing polyethylene foil also often resists efforts to make it lie flat. Further, the exposed photographic emulsion layer is subject to injury, both during the process of applying it to a new substrate and when the laminate is handled after the emulsion layer has been transferred.
  • the present invention provides a simple, inexpensive means for applying high quality colored or black-and-white images to canvas or other desired substrates.
  • Use of the product of the invention is simple enough that amateurs should be able to obtain excellent results, even without previous experience.
  • a colored image transferred to a canvas substrate not only closely resembles a portrait, but is also protected from inadvertent abrasion of the photographic emulsion layers.
  • the article of the invention is a composite photographic structure comprising a selfsupporting flexible carrier sheet over which is positioned a light-sensitive element including at least one stratum of photographic emulsion containing dispersed silver halide particles. Interposed between the carrier sheet and the light-sensitive element, binding them together, is a lighttransmitting, flexible, stretchable thermoplastic polymeric self-supporting barrier foil. Peel adhesion between the barrier foil and the carrier sheet is substantially less than either the peel adhesion between the barrier foil and the light-sensitive element or the cohesive strength of either the carrier sheet or the barrier foil. At the same time, the peel adhesion between the barrier foil and carrier sheet is sufficiently high to prevent separation during manufacture of the composite and the subsequent handling during imaging, developing and drying of the lightsensitive element.
  • a photographic image which has been prepared in a composite photographic structure of the type just described is transferred to any desired substrate by applying a layer of adhesive to the surface of the image-bearing lightsensitive element, placing the surface of the adhesive in contact with a substrate and forming an adhesive bond thereto, and stripping away the carrier sheet to leave a photographic image adhered to the substrate and protectively covered by the light-transmitting polymeric barrier foil .
  • the product resulting from the steps described in the preceding paragraph is thus a photographic reproduction comprising in combination a substrate, an adhesive layer overlying at least a portion of the substrate, an imaged silver halide-containing element overlying the adhesive and bonded thereto, and a self-supporting flexible protective light-transmitting polymeric barrier foil overlying and bonded to the silver halide-containing element.
  • FIGURE 1 depicts the simplest form of composite photographic structure of the invention
  • FIGURE 2 is a cross-sectional view of a composite photographic structure of the invention, showing imaged plural layers of photographic emulsions containing dispersed silver halide particles, as is the case where a colored image is sought, with an adhesive layer applied to the exposed silver halide layer;
  • FIGURE 3 shows the imaged composite color photographic structure of FIGURE 2 in the process of being transferred to a substrate
  • FIGURE 4 shows, in perspective, a portrait-like image transferred to a substrate as shown in FIGURE 3.
  • composite photographic structure 10 comprises light-sensitive element 11, made up of silver halide particles 11a dispersed in photographic emulsion lib.
  • Element 11 is firmly bonded to transparent polymeric barrier foil 13, which in turn i s removably bonded to carrier sheet 15.
  • the adhesion of light-sensitive element 11 to transparent barrier foil 13 along interface 12. exceeds the adhesion of barrier foil 13 to carrier sheet.15 along interface 14.
  • FIGURE 2 a somewhat more sophisticated, and presently preferred, form of composite photographic structure 20 is shown in imaged condition, ready for transfer to a substrate.
  • Light-sensitive element 21 is made up of imagable strata 21a, 21b and 21c adhered to transparent barrier foil 23, primer (or subbing) layer 22 being interposed to enhance adhesion.
  • Barrier foil 23 is removably adhered to photographic carrier sheet 25, release layer 24 optionally being interposed to assure the proper degree of separability.
  • Photographic carrier sheet 25 comprises paper base layer 26, to which is laminated polymeric foil 27, serving to reduce any tendency of sheet 25 to curl, e.g., when paper 26 expands during the development process.
  • FIGURE 3 shows how the imaged and adhesive-coated composite photographic structure 20 of FIGURE 2 is transferred to one face of canvas substrate 40 and carrier sheet
  • the force required to separate release layer 24 from barrier foil 23 should be more than 1 gm/cm width but less than 25 gm/cm width; preferably, the peel adhesion value lies between 6 and 10 gm/cm width. In most cases, especially where base layer 26 is photographic paper, release layer 24 can be omitted. If, however, base layer 26 is a polymeric foil, release layer 24 will probably be required to reduce the adhesion between the base layer
  • Barrier foil 23 must be sufficiently flexible and extensible to permit the transferred photographic structure to conform to the irregular surface contours of canvas or other substrate to which structure is applied. It should also have sufficient strength that the separation of base layer 26 from its surface will not cause it to distort or rupture.
  • barrier foils are certain A-B-A rubbery block copolymers and substantially unoriented polyolefins, especially low density polyethylene.
  • barrier foil 23 is at least 10 micrometers thick but not more than 100 micrometers thick, preferably, the thickness is in the range of 15-30 micrometers, thereby enabling the foil to conform to the irregularities of the underlying substrate.
  • Layer 30, which may comprise a curable, dryable heatactivated, solvent-activated or normally tacky and pressuresensitive adhesive, may be applied from organic solvents, melts or aqueous solutions and dispersions; alternatively, it may be applied by well-known transfer coating processes.
  • Adhesive layer 30 desirably contains sufficient titanium dioxide or other pigment to render it opaque white, thereby providing the background necessary for true color balance in image-containing layer 21, i.e., as in a color photograph.
  • the flexibility and conformability of adhesive layer 30 should also be consistent with the properties of barrier layer 23 and substrate 40.
  • the presently preferred adhesive system is one which has pressure-sensitive adhesive characteristics at room temperature and comprises a heat-activatable hot melt adhesive containing inherently tacky elastomeric copolymer microspheres, all as described in detail in U.S. Patent No. 4,049,483.
  • An adhesive of this type has sufficient tack to permit structure 20 to remain temporarily in a fixed position, the amount of tack being low enough, however, that structure 20 can be readily removed and repositioned if necessary. After structure 20 has been finally positioned, sufficient heat is applied to surface 27 to activate the hot melt adhesive component of layer 30, causing it to flow sufficiently to conform intimately to the surface irregularities of substrate 40. While a press having a heated platen is preferred for activating the hot melt component of the adhesive layer 30, it has been found that an ordinary pressing iron can be used for this purpose.
  • Example 1 A sheet of biaxially oriented polyethylene terephthal ate foil, approximately 36 micrometers thick and having a silicone release coating on one face, was obtained. A high density polyethylene foil approximately 15 micrometers thick was positioned over the silicone-coated surface of the polyester foil and placed in a dry mounting press set at approximately 150°C for 3 minutes. The resulting laminate was removed from the press and allowed to cool for 5 minutes at room temperature, after which the exposed surface of the polyethylene foil was subjected to corona dis ⁇
  • an opaque white paper having a polyethylene foil laminated to each face and weighing approximately 125 g/m 2 .
  • a 25% solids solution of 95.5:4.5 iso-octyl-acrylate:acrylic acid copolymer adhesive the solvent thereafter being evaporated in a hot air oven maintained at approximately 80°C for 4 minutes to leave a dried adhesive coating weighing approximately 12.5 g/m 2 .
  • To the adhesive-coated surface was then laminated the untreated side of the polyester foil described in the preceding paragraph, after which three strata constituting a full color silver halide photographic emulsion element was coated on the previously subbed surface of the polyethylene foil.
  • Each of the three strata contained a different color-forming chemical, viz., a cyanforming dye, a yellow-forming dye, and a magenta-forming dye.
  • the composite photoemulsion element was then imaged, developed by conventional wet photographic methods, and dried, after which a pre-formed layer of hot melt adhesive containing inherently tacky elastomeric copolymer microspheres (cf. U.S. Patent 4,049,483), carried by a removable liner, was placed in contact with the surface of the developed photo emulsion and the back side of the liner rubbed briskly to ensure adequate bonding. When the liner was removed, the exposed surface of the adhesive was sufficiently tacky to permit the assembly to be mounted in a desired position but readily removed and repositioned.
  • the tacky adhesive-coated surface of the structure just described was placed in contact with a canvas cloth, having 8 threads/cm in both the warp and fill directions, and placed for one minute in a press having a 2.5-cm foam pad opposed by a platen heated to approximately 80°C, thereby flowing the hot melt adhesive component of the adhesive layer and firmly bonding it to the canvas substrate.
  • the laminate was then removed from the press and allowed to cool for one minute, after which the polyethylene-surfaced photographic paper was doubled back on itself at 180° and peeled away from the photographic layer; the force required for removal at 30.5 cm/minute was found to be 8.7 gm/cm width when measured in accordance with ASTM Test No. D903.
  • There remained on the canvas a photograph which was the mirror image of that which previously appeared on the original photographic composite.
  • the photograph was protected by the high density polyethylene foil, the surface of which displayed an irregular appearance corresponding, to that of the underlying canvas.
  • a white photographic grade base paper having a polyethylene anti-curl foil laminated to one surface was obtained.
  • a 5% solids heptane solution of a conventional silicone release agent ("Siloff" 23, commercially available from Dow Chemical Company), after which the solvent was evaporated in an oven and the silicone cured by heating 2 minutes at 93°C, leaving a dry release coating weighing approximately 230 mg/m 2 .
  • a 19-micrometer layer of high density polyethylene (DFD 3300, available from Union Carbide, Inc.) was extruded.
  • the equipment employed was a 4-zone 19-mm. laboratory extruder having a length : diameter ratio of 25:1 and a screw speed of 20 revolutions per minute.
  • the four zones were respectively heated to 244°C, 254°C, 266°C and 271°C, the die temperature being 258°C, and the die pressure 42.8 kg/cm 2 .
  • the extruded polyethylene ribbon in contact with the silicone-coated surface of the paper, was then passed between a rubber roll and chrome steel chill roll (82°C), the latter contacting the extruded polyethylene.
  • the exposed surface of the extruded polyethylene was then subjected to corona discharge treatment, subbed, and coated with full color photographic emulsion, all substantially as in Example 1.
  • the emulsion was imaged, developed, dried, provided with a layer of microsphere-containing hot melt adhesive, and transferred to a canvas substrate, again following the procedure of Example 1.
  • the force required to separate the paper carrier from the polyethylene-protected image was 5.4 g/cm width.
  • Example 2 was repeated except that the silicone release agent was omitted.
  • the force to separate the carrier from the polyethylene-protected image was 6.3 g/cm width.
  • Example 3 was repeated except that the high density polyethylene resin was replaced by a low density transparent polyethylene resin ("PolyEth" 4516, commercially available from Gulf Oil Chemical Co.) and a 51-mm extruder having alength:diameter ratio of 28:1 was employed. Satisfactory results were obtained when the extruder operating conditions were as follows: screw-speed -- 70 rpm; extruder zone temperatures -- respectively 246°C, 260°C, 274°C, and 274°C; die temperature -- 274°C; die pressure -- 35.1 kg/cm 2 ; chill roll temperature -- 8°C. The force required to remove the base web from. the polyethylene-protected imaged layer was 6.4 g/cm width.
  • PolyEth low density transparent polyethylene resin
  • the images can be transferred to card stock for the preparation of aesthetically appealing packaging material, to clear acrylic sheet material for use in back-illuminated photographic displays, to steel plates for use in the area of automotive graphics, to glass for an inexpensive simulation of stained glass, to enamelpainted panels for use a photographic decal comania, to wooden boards for rustic effects, etc.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Laminated Bodies (AREA)

Abstract

Structure photographique composite laminee separement. Un element sensible a la lumiere (21) est colle sur une feuille transparente faisant barriere (23), qui a son tour est collee de maniere amovible sur une feuille porteuse photographique (25). La couche adhesive (30) est fermement liee a la surface la plus a l'exterieur de l'element (21). Apres developpement d'une image dans l'element (21) la couche adhesive (30) est collee sur un substrat (40). La couche porteuse (25) est alors depouillee, laissant l'element image (21) lie sur le substrat (40) et recouvert de maniere protectrice par la feuille barriere (23).
EP19800901439 1979-06-21 1980-12-30 Structure photographique composite. Withdrawn EP0030974A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5068679A 1979-06-21 1979-06-21
US50686 1987-05-18

Publications (2)

Publication Number Publication Date
EP0030974A1 true EP0030974A1 (fr) 1981-07-01
EP0030974A4 EP0030974A4 (fr) 1982-05-10

Family

ID=21966768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800901439 Withdrawn EP0030974A4 (fr) 1979-06-21 1980-12-30 Structure photographique composite.

Country Status (6)

Country Link
EP (1) EP0030974A4 (fr)
BE (1) BE883941A (fr)
BR (1) BR8008724A (fr)
FR (1) FR2459498A1 (fr)
IT (1) IT1146088B (fr)
WO (1) WO1980002879A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459498A1 (fr) * 1979-06-21 1981-01-09 Minnesota Mining & Mfg Structures photographiques composites et leurs utilisations

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060070A3 (fr) * 1981-03-12 1982-11-10 Minnesota Mining And Manufacturing Company Matériau photographique résistant à la décoloration et à l'abrasion, méthode de fabrication et matériau photographique
JPS62238732A (ja) * 1986-04-10 1987-10-19 Gunze Ltd プリントラミネ−ト用フイルム及びその熱圧着方法
US4988559A (en) * 1988-11-15 1991-01-29 Oji Paper Co., Ltd. Support sheet for photographic printing sheet
DE69026510T2 (de) * 1989-10-31 1996-09-12 Du Pont Abziehschicht für wässrig oder halbwässrig entwickelbare flexodruckplatten

Citations (5)

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FR1513828A (fr) * 1966-03-09 1968-02-16 Procédé pour transférer une diapositive à partir d'une épreuve positive
DE1932056A1 (de) * 1968-06-28 1970-01-02 Hermann Schoenberg Verfahren zur UEberfuehrung eines Bildes durch ein Bindemittel auf eine Bildempfaenger-Flaeche
DE2447768A1 (de) * 1973-10-05 1975-04-17 Canon Kk Verfahren zur erzeugung eines bildes
DE2815072A1 (de) * 1977-04-11 1978-10-19 Fuji Photo Film Co Ltd Lichtempfindliches papier
FR2459498A1 (fr) * 1979-06-21 1981-01-09 Minnesota Mining & Mfg Structures photographiques composites et leurs utilisations

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FR1513828A (fr) * 1966-03-09 1968-02-16 Procédé pour transférer une diapositive à partir d'une épreuve positive
DE1522443A1 (de) * 1966-03-09 1970-06-25 Buck Norman Roger Verfahren zum Abloesen,UEbertragen und Haltbarmachen duenner Filme
DE1932056A1 (de) * 1968-06-28 1970-01-02 Hermann Schoenberg Verfahren zur UEberfuehrung eines Bildes durch ein Bindemittel auf eine Bildempfaenger-Flaeche
DE2447768A1 (de) * 1973-10-05 1975-04-17 Canon Kk Verfahren zur erzeugung eines bildes
US3982940A (en) * 1973-10-05 1976-09-28 Canon Kabushiki Kaisha Process for the formation of images
DE2815072A1 (de) * 1977-04-11 1978-10-19 Fuji Photo Film Co Ltd Lichtempfindliches papier
FR2459498A1 (fr) * 1979-06-21 1981-01-09 Minnesota Mining & Mfg Structures photographiques composites et leurs utilisations

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Title
See also references of WO8002879A1 *

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459498A1 (fr) * 1979-06-21 1981-01-09 Minnesota Mining & Mfg Structures photographiques composites et leurs utilisations

Also Published As

Publication number Publication date
BE883941A (fr) 1980-12-22
IT8049031A0 (it) 1980-06-20
EP0030974A4 (fr) 1982-05-10
FR2459498A1 (fr) 1981-01-09
WO1980002879A1 (fr) 1980-12-24
IT1146088B (it) 1986-11-12
BR8008724A (pt) 1981-04-28

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