EP0545893B1 - Feuille réceptrice d'image pour l'impression par transfert thermique - Google Patents

Feuille réceptrice d'image pour l'impression par transfert thermique Download PDF

Info

Publication number
EP0545893B1
EP0545893B1 EP93100728A EP93100728A EP0545893B1 EP 0545893 B1 EP0545893 B1 EP 0545893B1 EP 93100728 A EP93100728 A EP 93100728A EP 93100728 A EP93100728 A EP 93100728A EP 0545893 B1 EP0545893 B1 EP 0545893B1
Authority
EP
European Patent Office
Prior art keywords
image
layer
thermal transfer
sheet
intermediate layer
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
EP93100728A
Other languages
German (de)
English (en)
Other versions
EP0545893A1 (fr
Inventor
Hiromasa Kondo
Yoshitaka Okumura
Terunobu Fukui
Noritaka Egashira
Tamami Iwata
Naoto Satake
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.)
Dai Nippon Printing Co Ltd
New Oji Paper Co Ltd
Original Assignee
Dai Nippon Printing Co Ltd
New Oji Paper 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
Priority claimed from JP62186096A external-priority patent/JPH0832487B2/ja
Priority claimed from JP62186095A external-priority patent/JPH0825339B2/ja
Priority claimed from JP62259968A external-priority patent/JPH0635212B2/ja
Priority claimed from JP63115065A external-priority patent/JP2575177B2/ja
Application filed by Dai Nippon Printing Co Ltd, New Oji Paper Co Ltd filed Critical Dai Nippon Printing Co Ltd
Publication of EP0545893A1 publication Critical patent/EP0545893A1/fr
Application granted granted Critical
Publication of EP0545893B1 publication Critical patent/EP0545893B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/41—Base layers supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/02—Dye diffusion thermal transfer printing (D2T2)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/06—Printing methods or features related to printing methods; Location or type of the layers relating to melt (thermal) mass transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/32—Thermal receivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5263—Macromolecular coatings characterised by the use of polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • B41M5/5272—Polyesters; Polycarbonates

Definitions

  • the present invention relates to an improvement in image-receiving sheets for thermal transfer printing which are adapted for printing images thereon by transfer of a sublimable dye of a thermal transfer sheet by application of heat from a thermal head in accordance with image signals. More particularly, the present invention relates to an improved image-receiving sheet with a two-layered intermediate layer for thermal transfer printing.
  • Thermal printing systems in which printed images are obtained upon reception of input signals are made up of a relatively simple apparatus and are inexpensive and low in noises, so that they have increasing utility in various fields such as facsimiles, terminal printers for electronic computers, printers for measuring instruments, video printers, and the like.
  • a recording medium generally used in these thermal printing systems is a so-called color-developing, heat-sensitive recording paper having a recording layer which undergoes a physical or chemical change by application of heat to form a color.
  • the recording paper of the color developing type has disadvantages in that it is liable to undesirably develop the color during the process of fabrication or during storage.
  • the image printed on the paper is poor in storage stability and is apt to fade on contact with organic solvents or chemicals.
  • thermosensitive recording paper a thermal transfer printing system in which a recording medium utilizing a dye or colorant is used instead of the color-developing thermosensitive recording paper.
  • a colorant or colored dye is caused to melt, evaporate or sublimate by application of heat and transferred on a recording paper, thereby forming a record image by adhesion, adsorption or reception of the dye on the recording paper.
  • a mechanism as is shown in Fig. 2.
  • a thermal transfer sheet 201 having a dye layer on a substrate and a thermal transfer image-receiving sheet 203 set on a platen roller 202 are superposed and heated from the non-faced side of the thermal transfer sheet 201 by a heating means 204 such as a thermal head.
  • the thermal head 204 is controlled with electric signals corresponding to image information.
  • the dye of the thermal transfer sheet is transferred on an image-receiving layer.
  • a thermal transfer sheet used is a sheet which has been coated or printed, as shown in Fig. 3, a start mark 301 and dyes including yellow 302, magenta 303 and cyan 304, and also including a black dye, if necessary.
  • This sheet is superposed on a thermal transfer image-receiving sheet and the yellow, magenta and cyan dyes are successively heated according to the respective color-separated image signals to make an image in which the three colors are superposed.
  • a natural color, photographic image is formed.
  • a known thermal transfer image-receiving sheet used in this type of printing system is one which has an image-receiving layer obtained by coating onto a paper substrate such as high-quality paper a coating of a dispersion of finely powdered silica or calcium carbonate in a binder such as a thermoplastic polyester resin.
  • the image-receiving layer is formed on the substrate, such as wood free paper, whose smoothness is low, it is difficult to obtain a satisfactory printed image.
  • the substrate such as wood free paper
  • missing transfer portions are liable to occur at half-tone to low-tone portions.
  • images such as of symbols, letters and figures are substantially solid and thus the missing transfer portions are not conspicuous, missing transfer portions on photographs or colored solid images will undesirably tend to become marked and produce vital deficiencies. Accordingly, there is a strong demand for eliminating such deficiencies.
  • the method (1) has a problem that the productivity lowers because it comprises the step in which the intermediate layer which has been kept as softened or plastic is brought into close contact with mirror-like finished chromium plated metal drum for heating and drying.
  • the method (2) involves the problem that a soft resin such as MBR, polyurethane, polybutadiene, SBR or the like, which has been formulated so as to improve the adhesiveness, is liable to block when wound up after coating and drying. Additionally, the resin dissolves in an organic solvent of the coating solution forming an image-receiving layer, so that the image-receiving layer cannot be formed uniformly, thus causing a lowering of an optical density of the printed image.
  • a soft resin such as MBR, polyurethane, polybutadiene, SBR or the like
  • An object of the invention is to provide an improved image-receiving sheet with a two-layered intermediate layer for thermal transfer printing which is free from the foregoing problems which are found on the known image-receiving sheet and which enables one to form beautiful printing images of high optical density without involving the known problem relating to a transfer missing portion.
  • Another object of the invention is to provide an improved image-receiving sheet with a two-layered intermediate layer which is capable of forming images of high quality having good gradation and which is free from the known problem relating to a missing transfer portion even upon using as a base sheet various paper sheets made primarily of pulp fibers.
  • the present inventors have made intensive studies in order to achieve the above objects and, as a result, found that when a base sheet is first formed with an intermediate layer made primarily of a resin insoluble in organic solvents and then with an image-receiving layer made chiefly of a resin soluble in organic solvents, the smoothness and the anti-blocking properties are significantly improved. And this results in making printed images beautiful without causing any missing transfer portion and making the printed images to have an excellent optical density.
  • the present invention has been accomplished based on the above findings.
  • the present invention relates to an image-receiving sheet for thermal transfer printing which comprises (a) an intermediate layer and (b) an image-receiving layer formed on a substrate in this order, characterised in that said intermediate layer (a) comprises (a-i) a lower layer and (a-ii) an upper layer formed on said lower layer (a-i), said image-receiving layer (b) being comprised primarily of a resin soluble in an organic solvent, said lower layer (a-i) being comprised primarily of a resin insoluble in an organic solvent, said resin being formed from a polymer latex satisfying the following requirements (1) and (2): (1) compositional constituents: aliphatic conjugated diolefinic monomer 20-70 wt.-% unsaturated acid monomer 0.5-15 wt.-% other olefinic monomer 15-79.5 wt.-% (2) gel content: 85-100 wt.-% and containing hollow particles in an amount of not less than 50 wt.-% of the total solids
  • Fig. 1 is a schematic sectional view showing an image-receiving sheet for thermal transfer printing according to the invention.
  • 101 denotes a substrate
  • 102 denotes the above-mentioned intermediate layer
  • 103 denotes an image-receiving layer.
  • the main constituent layer of the intermediate layer of the image-receiving sheet according to the present invention contains as its primary component resins which are insoluble in organic solvents.
  • Monomer Composition (A) Aliphatic conjugated diolefinic monomer wt% 20 - 70 (B) Unsaturated acid monomer 0.5 - 15 wt% (C) Olefinic monomer other than said aliphatic conjugated diolefinic monomer 15 - 79.5 wt% Gel Content: 85 - 100 wt%
  • the aliphatic conjugated diolefinic monomer (A) is generally selected from those having from 4 to 10 carbon atoms. Specific examples include 1,3-butadiene, 2-methyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene, halogen-substituted butadienes, substituted linear conjugated pentadienes, linear or branched conjugated hexadienes, and the like.
  • the aliphatic conjugated diolefinic monomer should be contained in an amount of from 20 to 70 wt% of the copolymer latex. When the content is less than 20 wt%, the resultant resin becomes hard and brittle and exhibits poor film forming properties and adhesion strength. Over 70 wt%, the resultant resin becomes too soft even when the gel content is over 85 wt%, tending to cause sticking on rolls during the course of coating or blocking.
  • the unsaturated acid monomer (B) includes, for example, acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, dicarboxylic acid anhydrides, dicarboxylic acid monoalkyl esters, and the like.
  • the unsaturated acid monomer is contained in an amount of from 0.5 to 15 wt% of the copolymer latex. If the content is less than 0.5 wt%, the mechanical stability of the copolymer latex lowers, whereas over 15 wt%, the latex tends to undesirably become too viscous.
  • the olefinic monomer (C) other than the aliphatic conjugated diolefinic monomer (A) and the unsaturated acid monomer (B) includes, for example, aromatic vinyl monomers such as styrene, alpha-methylstyrene, dimethylstyrene vinyl toluene and the like, acrylates monomers such as methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate and the like, methacrylate monomers such as methyl methacrylate, ethyl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate and the like, unsaturated nitrile monomers such as acrylonitrile, methacrylonitrile and the like, and acrylamide, N-methylolacrylamide, glycidyl acryl
  • the gel content of the copolymer latex should be controlled in a range of from 85 to 100 wt%.
  • the gel content may be influenced depending upon the monomer composition, the yield of emulsion polymerization, the polymerization temperature and the like, it should be controlled over 85 wt% by controlling an amount of a chain transfer agent such as carbon tetrachloride, dodecyl mercaptan, octyl mercaptan or the like or by appropriately using a crosslinking agent such as methylenebisacrylamide, divinylbenzene, diallyl phthalate or the like.
  • a chain transfer agent such as carbon tetrachloride, dodecyl mercaptan, octyl mercaptan or the like
  • a crosslinking agent such as methylenebisacrylamide, divinylbenzene, diallyl phthalate or the like.
  • gel content used herein is a value determined according to the following procedure.
  • a latex is allowed to stand on a glass plate at room temperature (in a air-dried condition) over 24 hours, after which it is dried in vacuum for 2 to 3 hours to obtain an about 1 mm thick latex film.
  • About 0.5 g of the thus obtained film is accurately weighed and immersed in 50 ml of toluene at room temperature for 24 hours.
  • the toluene solution is passed through a 200 mesh stainless steel screen to collect an insoluble matter, followed by drying it at 135°C for 3 hours and measuring the weight. Then, the ratio (wt%) to the weight prior to the immersion in the toluene solution is calculated as the gel content.
  • the above specific type of copolymer latex should preferably be contained in the main constituent layer of the intermediate layer in an amount of not less than 60 wt%, more preferably not less than 70 wt%, of the total solid of the main constituent layer of the intermediate layer in order to obtain a desired high optical density for images as printed.
  • the main constituent layer of the intermediate layer may further contain various additives including pigments such as silica, alumina, clay, calcium carbonate and plastic pigments, lubricants, fluorescent dyes, and other adhesives in amounts not impeding the effects of a resin insoluble in organic solvents.
  • pigments such as silica, alumina, clay, calcium carbonate and plastic pigments, lubricants, fluorescent dyes, and other adhesives in amounts not impeding the effects of a resin insoluble in organic solvents.
  • the heat insulating properties and cushioning properties lower, causing the optical density to lower with an increasing number of missing transfer portions. It has been found that when hollow particles are contained in the resin, the heat-insulating properties of the main constituent layer of the intermediate layer can be remarkably improved together with an attendant remarkable improvement in the optical density for images as printed.
  • the hollow particles useful for this purpose are, for example, those described below.
  • thermoplastic materials such as vinylidene chloride-acrylonitrile copolymers
  • a volatile expanding agent such as propane, n-butane, iso-butane or the like
  • Matsumoto Microsphere F-30TM produced by Matsumoto Yushi-Seiyaku Co., Ltd.
  • Hard resins such as acryl-styrene copolymers are used as a shell in which water is contained and is flown away upon drying to form hollow polymer particles.
  • Ropaque OP-84JTM acryl-styrene copolymer
  • Rohm & Haas Japan Kabushiki Kaisha commercially available product: Ropaque OP-84JTM (acryl-styrene copolymer), produced by Rohm & Haas Japan Kabushiki Kaisha.
  • the above hollow particles have a size of 0.1 to 200 micrometers.
  • those hollow particles having a size of from 0.1 to 20 micrometers are used.
  • the size is less than 0.1 micrometer, satisfactory heat-insulating effects cannot be expected. Over 20 micrometers, the smoothness of the image-receiving layer lowers. In this connection, however, the hollow particles obtained by thermal expansion of thermally expandable plastic materials have the cushioninig action and are flexible, so that they are usable when the size is not larger than 100 micrometers.
  • the above-mentioned hollow particles are all soluble in organic solvents such as methyl ethyl ketone and should be used after dispersion in an organic solvent-resistant resin used as an binder.
  • the hollow particles are used in an amount of not less than 50 wt% of the total solids in the main constituent layer of the intermediate layer.
  • the intermediate layer of the image-receiving sheet according to the present invention has a two-layered structure comprising the main constituent layer and the protective layer.
  • the protective layer is disposed on the main constituent layer comprised of the hollow particles.
  • the protective layer serves not only to smooth the surface of the main constituent layer comprised of the hollow particles but also to provide the resulting image-receiving sheet with a desirable flexibility.
  • the protective layer is formed of an organic solvent-resistant resin.
  • the organic solvent-resistant resin by which the protective layer is constituted are copolymer latices having specific monomer composition and gel content.
  • resins having good film-forming properties and capable of inhibiting organic solvents from infiltrating may be used including, for example, hydrophilic polymers such as polyvinyl alcohol, casein, starch and the like, acrylic esters, ethylene-vinyl acetate copolymers, carboxyl group-containing polyethylene, and the like.
  • the copolymer latices and the hydrophilic polymers including polyvinyl alcohol, casein, starch and the like are preferred because of good synergistic effects with the hollow particles contained in the main constituent layer.
  • the thickness of the main constituent layer of the intermediate layer is generally in the range of from 10 to 50 micrometers, preferably from 15 to 30 micrometers.
  • dry coating of the main constituent layer of the intermediate layer is in the range of from 1 to 10 g/m 2 , and preferably, from 2 to 6 g/m 2 .
  • the thickness is in the range of from 5 to 50 micrometers, preferably from 10 to 30 micrometers.
  • the main constituent layer of the intermediate layer may further comprise microcapsules which contain a core substance having the plasticizing action on an image-receiving layer made primarily of a resin soluble in organic solvent, e.g. esters such as phosphoric esters, (tere)phthalic esters, adipic esters and the like, polyesters in the form of oligomers of dibasic acids and glycols or glycerine, epoxy fatty acid esters, and the like.
  • the thermal transfer image-receiving sheet obtained in this case is improved in the receptivity of sublimable dyes without involving any missing transfer portion and has a high optical density for images as printed.
  • the wall of the capsule used above should permit thermal transmission of the core substance through the capsule wall when heated at the time of printing.
  • the capsule wall is desired to be made of polyurethane or polyurea.
  • the substrate 101 there may be used, for example, a synthetic paper, a wood free paper, a No.1 grade coated paper, a coated paper, a cast coated paper, polymer films, and composite sheets of these papers and films.
  • the smoothness of paper sheet is measured by means of a measuring instrument such as a specular reflection smoothness tester, a Bekk smoothness tester, a Parker Print Surf or the like.
  • a measuring instrument such as a specular reflection smoothness tester, a Bekk smoothness tester, a Parker Print Surf or the like.
  • the measurement with an air leakage-type Bekk smoothness tester or Parker Print-Surf is greatly influenced by air permeability of the substrate sheet. It has been found difficult to establish a correct interrelation between a measurement and an actual smoothness for various substrate sheets whose properties greatly differ from one another.
  • the smoothness of a paper substrate sheet used in the practice of the present invention should be determined using a specular reflection smoothness tester.
  • a paper substrate sheet having not less than 6%, preferably not less than 7%, when measured at a pressure of 20 kg/cm 2 (a greater value leading to a better smoothness) is used, an intermediate layer having desired characteristics can be very efficiently formed.
  • the paper-base substrates are not critical with respect to the type provided that the above requirements for the surface are satisfied.
  • Examples of the paper-base substrate includes gloss, dull and mat-type coated papers such as No.1 grade coated papers, coated papers, lightweight coated papers, finely coated papers, cast coated papers and the like, and non-coated papers such as wood free papers, medium papers, super calendered papers and the like.
  • the image-receiving layer of the image-receiving sheet for thermal transfer printing according to the invention is formed primarily of resins soluble in organic solvents.
  • the organic solvent-soluble resins are those below mentioned.
  • polyester resins and vinylchloride-(meth)acrylic ester copolymers are preferred because of their good transferability in dye stuffs and of their light fastness of transferred dye stuffs.
  • additives may be added to the image-receiving layer, if necessary.
  • additives include mineral pigments such as, for example, titanium dioxide, zinc oxide, aluminium hydroxide, calcium carbonate, finely powdered silica and the like and organic white pigments such as plastic pigments in order to improve whiteness and thermal fusion properties, modified silicon resins, solid waxes, polyethylene waxes, amide waxes, calcium silicate, and the like.
  • UV absorbers and light stabilizers may be added in amounts not impeding the effects of the invention.
  • the image-receiving layer may be formed by applying a coating composition for the image-receiving layer onto the surface of the protective layer of the intermediate layer, which has been previously formed on a substrate, in a dry thickness of from 1 to 15 micrometers, preferably from 2 to 10 micrometers by any known coating apparatus such as, for example, a bar coater, a gravure coater or the like, and drying the coating composition applied.
  • a coating composition for the image-receiving layer onto the surface of the protective layer of the intermediate layer, which has been previously formed on a substrate, in a dry thickness of from 1 to 15 micrometers, preferably from 2 to 10 micrometers by any known coating apparatus such as, for example, a bar coater, a gravure coater or the like, and drying the coating composition applied.
  • An image-receiving sheet with a two-layered intermediate layer for thermal transfer printing was prepared in the following manner.
  • a paper stock comprised of 30 parts of bleached NKP and 70 parts of bleached LKP to which 0.4 parts of a rosin size, 10 parts of talc and 2.3 parts of aluminium sulfate were added was prepared and subjected to paper making by means of a Fourdrinier paper machine at a rate of 600 m/minute in such a way that a dry weight was 101 g/m 2 , followed by coating a oxidized starch solution having a concentration of 6% by the use of a size press in an amount of 50 ml/m 2 , drying and winding-up.
  • the resultant base paper sheet was subjected to supercalendering under the following conditions.
  • the base paper sheet was found to have a Cobb water absorption (5 second value) of 10.4 g/m 2 and a smoothness of 13% as determined by the specular reflection smoothness tester at a pressure of 20 kg/cm 2 .
  • the coating composition thus obtained was applied onto the surface of the base paper sheet obtained in the above in an amount to provide a thickness of 25 micrometers when dried, followed by drying, to thereby obtain a coated paper sheet.
  • the resultant coated paper sheet was subjected to supercalendering under the following conditions.
  • Supercalendering conditions linear pressure 60 kg/cm surface temperature of a chrominum-plated metal roll 25°C running paper speed 5 m/minute number of nips for running paper 2
  • the coated paper sheet obtained after the supercalendering treatment was found to have a Cobb water absorption (5 second value) of 12.3 g/m 2 and a smoothness (under a pressure of 20 kg/cm 2 ) of 16% when determined by a specular reflection smoothness tester.
  • a two-layered intermediate layer was formed in the following manner on the surface of the coated paper sheet obtained in the above.
  • thermally expandable hollow particles (trademark name: Matsumoto Microsphere F-30, produced by Matsumoto Yushi-Seiyaku Co., Ltd.) whose shell walls have a softening temperature of from 80 to 85°C and 30 parts of a modified styrene-butadiene latex (trademark name: JSR-0696, produced by Japan Synthetic Rubber Co., Ltd.) were agitated with a mixer, to which water was added so as to obtain a 45% coating composition.
  • a modified styrene-butadiene latex (trademark name: JSR-0696, produced by Japan Synthetic Rubber Co., Ltd.) were agitated with a mixer, to which water was added so as to obtain a 45% coating composition.
  • the resultant coating composition was applied onto the surface of the coated paper sheet obtained in the above, by means of a wire bar in an amount of 3.5 g/m 2 on a dry weight basis, followed by drying at 120°C for 1 minute. After the drying, the thermally expandable hollow particles were individually expanded to 30 to 70 times larger, whereby the lower layer was formed.
  • a coating composition comprising polyvinyl alcohol (trademark name: PVA-110, produced by Kuraray Co., Ltd.) was applied onto the surface of the lower layer formed in the above by means of a wire bar in an amount of 3.5 g/m 2 on a dry weight basis, followed by drying, whereby the upper layer was formed.
  • PVA-110 polyvinyl alcohol
  • an intermediate layer comprising the lower layer as the main constituent layer and the upper layer as the protective layer was formed on the surface of the coated paper sheet.
  • a polyester resin (trademark name: Vylon 200, produced by Toyobo Co., Ltd.), 0.5 parts of an amino-modified silicon (trademark name: KF-393, produced by The Shin-Etsu Chemical Co., Ltd.), and 0.5 parts of an epoxy-modified silicon (trademark name: X-22-343, produced by Shin-Etsu Chem. Co., Ltd.) were added to methyl ethyl ketone/toluene (ratio by weight of 1:1) while agitating with a mixer, to thereby obtain a coating composition for the image-receiving layer having a solid content of 15%.
  • the coating composition obtained in the above was applied onto the surface of the upper layer of the intermediate layer in an amount to provide a thickness of 7 micrometers when dried by means of a wire bar, followed by drying.
  • the resultant was subjected to supercalendering under the following conditions, to thereby form an image-receiving layer on the surface of the upper layer of the intermediate layer.
  • Supercalendering conditions linear pressure 90 kg/cm surface temperature of a chrominum-plated metal roll 70°C running paper speed 5 m/minute number of nips for running paper 2
  • a thermal transfer sheet was prepared in the following manner.
  • a sublimable disperse dye (trademark name: Kayaset Blue 714, produced by Nippon Kayaku Co., Ltd.) and 60 parts by weight of polyvinyl butyral were added to methyl ethyl ketone/toluene (ratio by weight of 1:1) while agitating with a mixer to obtain an ink composition having a solid content of 10%.
  • a sublimable disperse dye trademark name: Kayaset Blue 714, produced by Nippon Kayaku Co., Ltd.
  • the ink composition obtained in the above was applied onto a 4.5 micrometer thick PET film, whose back side had been subjected to heat-resisting treatment, in an amount of 1 g/m 2 on a dry weight basis by means of a wire bar, followed by drying.
  • the thermal transfer sheet obtained in the above was superposed on the image-receiving sheet for thermal transfer printing obtained in the above, followed by printing under conditions of an output power of 1 W/dot, a pulse width of 0.3 to 4.5 msec., and a dot density of 3 dots/mm for evaluation.
  • the evaluated results are shown in Table 1.
  • An image-receiving sheet with a two-layered intermediate layer for thermal transfer printing was prepared in the following manner.
  • a paper stock comprised of 30 parts of bleached NKP and 70 parts of bleached LKP to which 0.4 parts of a rosin size, 10 parts of talc and 2.3 parts of aluminium sulfate were added was prepared and subjected to paper making by means of a Fourdrinier paper machine at a rate of 600 m/minute in such a way that a dry weight was 101 g/m 2 , followed by coating a oxidized starch solution having a concentration of 6% by the use of a size press in an amount of 50 ml/m 2 , drying and winding-up.
  • the resultant base paper sheet was subjected to supercalendering under the following conditions.
  • the base paper sheet was found to have a Cobb water absorption (5 second value) of 10.4 g/m 2 and a smoothness of 13% as determined by the specular reflection smoothness tester at a pressure of 20 kg/cm 2 .
  • a two-layered intermediate layer was formed in the following manner on the surface of the base paper sheet obtained in the above.
  • the resultant coating composition was applied onto the surface of the base paper sheet obtained in the above by means of a wire bar in an amount to provide a thickness of 20 micrometers when dried, followed by drying, whereby the lower layer was formed on the surface of the base paper sheet.
  • a coating composition comprising polyvinyl alcohol (trademark name: PVA-110, produced by Kuraray Co., Ltd.) was applied onto the surface of the lower layer by means of a wire bar in an amount of 3.5 g/m 2 on a dry weight basis, followed by drying, whereby the upper layer was formed.
  • PVA-110 polyvinyl alcohol
  • an intermediate layer comprising the lower layer as the main constituent layer and the upper layer as the protective layer was formed on the surface of the base paper sheet.
  • a polyester resin (trademark name: Vylon 200, produced by Toyobo Co., Ltd.), 0.5 parts of an amino-modified silicon (trademark name: KF-393, produced by The Shin-Etsu Chemical Co., Ltd.), and 0.5 parts of an epoxy-modified silicon (trademark name: X-22-343, produced by Shinetsu Chem. Ind. Co., Ltd.) were added to methyl ethyl ketone/toluene (ratio by weight of 1:1) while agitating with a mixer, to thereby obtain a coating composition for the image-receiving layer having a solid content of 15%.
  • the coating composition obtained in the above was applied onto the surface of the upper layer of the intermediate layer in an amount to provide a thickness of 7 micrometers when dried by means of a wire bar, followed by drying.
  • the resultant was subjected to supercalendering under the following conditions, to thereby form an image-receiving layer on the surface of the upper layer of the intermediate layer.
  • Supercalendering conditions linear pressure 90 kg/cm surface temperature of a chrominum-plated metal roll 70°C running paper speed 5 m/minute number of nips for running paper 2
  • a thermal transfer sheet was prepared in the following manner.
  • a sublimable disperse dye (trademark name: Kayaset Blue 714, produced by Nippon Kayaku Co., Ltd.) and 60 parts by weight of polyvinyl butyral were added to methyl ethyl ketone/toluene (ratio by weight of 1:1) while agitating with a mixer to obtain an ink composition having a solid content of 10%.
  • a sublimable disperse dye trademark name: Kayaset Blue 714, produced by Nippon Kayaku Co., Ltd.
  • the ink composition obtained in the above was applied onto a 4.5 micrometer thick PET film, whose back side had been subjected to heat-resisting treatment, in an amount of 1 g/m 2 on a dry weight basis by means of a wire bar, followed by drying.
  • the thermal transfer sheet obtained in the above was superposed on the image-receiving sheet for thermal transfer printing obtained in the above, followed by printing under conditions of an output power of 1 W/dot, a pulse width of 0.3 to 4.5 msec., and a dot density of 3 dots/mm for evaluation.
  • the evaluated results are shown in Table 1.
  • Example 1 The procedures of Example 1 were repeated, except that the upper layer of the intermediate layer was not formed and after the formation of the lower layer, an image-receiving layer was formed directly on the lower layer, to thereby obtain an image-receiving sheet with a single-layered intermediate layer for thermal transfer printing.
  • Example 2 The procedures of Example 2 were repeated, except that the upper layer of the intermediate layer was not formed and after the formation of the lower layer, an image-receiving layer was formed directly on the lower layer, to thereby obtain an image-receiving sheet with a single-layered intermediate layer for thermal transfer printing.
  • the image-receiving sheet was evaluated in the same manner as in Example 1. The evaluated results are shown in Table 1.
  • the resistance was evaluated by visual observation and measurement of a sheet thickness.
  • the intermediate layer and a black drawing paper were superposed and passed twice through a supercalender at a linear pressure of 50 kg/cm, after which the layer and the paper were separated from each other to observe the respective surfaces.
  • the optical density of cyan color transferred onto the image-receiving layer was evaluated by the use of a reflection densitometer (Macbeth RD914).

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Claims (4)

  1. Feuille réceptrice d'image pour l'impression par transfert thermique, qui comprend (a) une couche intermédiaire et (b) une couche de réception d'image formées dans cet ordre sur un substrat, caractérisée en ce que cette couche intermédiaire (a) comprend (a-i) une couche inférieure et (a-ii) une couche supérieure formée sur cette couche inférieure (a-i), cette couche de réception d'image (b) étant principalement composée d'une résine soluble dans un solvant organique,
       cette couche inférieure (a-i) étant principalement composée d'une résine insoluble dans un solvant organique,
       cette résine étant formée à partir d'un latex de polymère satisfaisant aux conditions requises (1) et (2) suivantes : (1) constituants de la composition : monomère dioléfinique conjugué aliphatique 20 à 70% en poids monomère acide insaturé 0,5 à 15% en poids autre monomère oléfinique 15 à 79,5% en poids (2) teneur en gel : 85 à 100% en poids
    et contenant des particules creuses en une quantité d'au moins 50% en poids des solides totaux dans la couche inférieure solide (a-i), les particules creuses ayant une dimension de 0,1 à 200 µm et étant solubles dans des solvants organiques, cette couche supérieure (a-ii) étant composée d'une résine résistant aux solvants organiques.
  2. Feuille réceptrice d'image pour l'impression par transfert thermique selon la revendication 1, dans laquelle la couche inférieure de la couche intermédiaire contient de plus une résine de liaison.
  3. Feuille réceptrice d'image pour l'impression par transfert thermique selon la revendication 1, dans laquelle le substrat est une feuille de papier faite principalement de fibres de pulpe.
  4. Feuille réceptrice d'image pour l'impression par transfert thermique selon la revendication 3, dans laquelle la feuille de papier a une égalité de surface d'au moins 6% et une absorption d'eau de 1 à 30 g/m2 lorsqu'elles sont déterminées selon les procédures suivantes :
    égalité de surface : valeur mesurée par un appareil de test de l'égalité de surface par réflexion spéculaire sous une pression de 20 kg/cm2; et
    absorption d'eau : une valeur pour 5 secondes déterminée selon "une procédure d'essai pour l'absorption d'eau par le papier et le carton (procédé de Cobb)" prescrite dans JIS P-8140.
EP93100728A 1987-07-24 1988-07-25 Feuille réceptrice d'image pour l'impression par transfert thermique Expired - Lifetime EP0545893B1 (fr)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP62186096A JPH0832487B2 (ja) 1987-07-24 1987-07-24 熱転写記録用受像シ−ト
JP186096/87 1987-07-24
JP62186095A JPH0825339B2 (ja) 1987-07-24 1987-07-24 熱転写記録用受像シ−ト
JP186095/87 1987-07-24
JP259968/87 1987-10-15
JP62259968A JPH0635212B2 (ja) 1987-10-15 1987-10-15 熱転写記録用受像シート
JP63115065A JP2575177B2 (ja) 1988-05-11 1988-05-11 被熱転写シート
JP115065/88 1988-05-11
EP88111947A EP0300505B1 (fr) 1987-07-24 1988-07-25 Feuille réceptrice d'image pour l'impression par transfert thermique

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP88111947A Division EP0300505B1 (fr) 1987-07-24 1988-07-25 Feuille réceptrice d'image pour l'impression par transfert thermique
EP88111947.3 Division 1988-07-25

Publications (2)

Publication Number Publication Date
EP0545893A1 EP0545893A1 (fr) 1993-06-09
EP0545893B1 true EP0545893B1 (fr) 1998-12-30

Family

ID=27470224

Family Applications (2)

Application Number Title Priority Date Filing Date
EP93100728A Expired - Lifetime EP0545893B1 (fr) 1987-07-24 1988-07-25 Feuille réceptrice d'image pour l'impression par transfert thermique
EP88111947A Expired - Lifetime EP0300505B1 (fr) 1987-07-24 1988-07-25 Feuille réceptrice d'image pour l'impression par transfert thermique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88111947A Expired - Lifetime EP0300505B1 (fr) 1987-07-24 1988-07-25 Feuille réceptrice d'image pour l'impression par transfert thermique

Country Status (2)

Country Link
EP (2) EP0545893B1 (fr)
DE (3) DE3856292T2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318943A (en) * 1991-05-27 1994-06-07 Dai Nippon Printing Co., Ltd. Thermal transfer image receiving sheet
EP0537485B1 (fr) * 1991-10-04 1996-11-13 Minnesota Mining And Manufacturing Company Nouveaux supports pour l'impression par transfert thermique
EP0743195B1 (fr) * 1995-05-15 1999-08-11 Fuji Photo Film Co., Ltd. Assemblage pour former des images et feuille réceptrice d'images
JPH10193805A (ja) * 1996-12-27 1998-07-28 Dainippon Printing Co Ltd 熱転写受像シート及びその製造方法
DE10064171B4 (de) * 2000-12-22 2004-05-27 Felix Schoeller Jr. Foto- Und Spezialpapiere Gmbh & Co. Kg Schichtträger für Bildaufzeichnungsmaterialien
US7034856B2 (en) * 2001-12-07 2006-04-25 Ricoh Company, Ltd. Receiving cloth for thermal transfer recording, and method of thermal transfer recording using the cloth
DE602004013985D1 (de) 2003-08-05 2008-07-03 Oji Paper Co Wärmetransferaufnahmebogen, verfahren zur herstellung desselben und verfahren zur bilderzeugung damit
US7223513B2 (en) * 2004-08-25 2007-05-29 Konica Minolta Photo Imaging, Inc. Thermal transfer image receiving sheet and manufacturing method of thermal transfer image receiving sheet
GB0424878D0 (en) * 2004-11-10 2004-12-15 Innovia Films Ltd Innovia films case A100
JP4490382B2 (ja) * 2006-02-28 2010-06-23 富士フイルム株式会社 感熱転写受像シートおよびその製造方法

Also Published As

Publication number Publication date
EP0545893A1 (fr) 1993-06-09
DE300505T1 (de) 1989-07-13
EP0300505A3 (en) 1990-05-30
EP0300505A2 (fr) 1989-01-25
DE3884877D1 (de) 1993-11-18
DE3856292T2 (de) 1999-06-02
DE3884877T2 (de) 1994-03-17
DE3856292D1 (de) 1999-02-11
EP0300505B1 (fr) 1993-10-13

Similar Documents

Publication Publication Date Title
US4837200A (en) Image-receiving sheet for thermal transfer printing
US5071823A (en) Image-receiving sheet for transfer recording
US5593939A (en) Thermal transfer image receiving sheet, production process therefor and thermal transfer sheet
CA1289822C (fr) Feuille thermiquement transferable
US5318943A (en) Thermal transfer image receiving sheet
US5260256A (en) Receptor layer transfer sheet, thermal transfer sheet, thermal transfer method and apparatus therefor
JPS61270192A (ja) 被熱転写シ−ト
EP0545893B1 (fr) Feuille réceptrice d'image pour l'impression par transfert thermique
US4962080A (en) Image-receiving sheet for thermal dye-transfer recording
JPH0475150B2 (fr)
JP2011218645A (ja) 熱転写受容シート
JP3055109B2 (ja) 熱転写シート
JP2535371B2 (ja) 熱転写記録用受像シ―ト
JPH0825339B2 (ja) 熱転写記録用受像シ−ト
JP3182829B2 (ja) 熱転写記録用受像シート
JP3218660B2 (ja) 熱転写記録用受像シート
JP2770948B2 (ja) 染料昇華転写記録用シート
JP2823205B2 (ja) 昇華染料転写画像受容シート
JPH05169845A (ja) 熱転写記録用受像シート
JPH0583079B2 (fr)
JPH0585067A (ja) 熱転写記録用受像紙
JPH0558059A (ja) 熱転写記録用受像シート
JPH0412888A (ja) 熱転写記録用受像シート
JPH0260791A (ja) 熱転写記録用受像シート
JPH03189190A (ja) 熱転写記録用受像シート

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 300505

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT NL

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SATAKE, NAOTO

Inventor name: IWATA, TAMAMI

Inventor name: EGASHIRA, NORITAKA

Inventor name: FUKUI, TERUNOBU

Inventor name: OKUMURA, YOSHITAKA

Inventor name: KONDO, HIROMASA

17P Request for examination filed

Effective date: 19930727

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DAI NIPPON INSATSU KABUSHIKI KAISHA

Owner name: NEW OJI PAPER CO., LTD.

17Q First examination report despatched

Effective date: 19960722

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 300505

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981230

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19981230

REF Corresponds to:

Ref document number: 3856292

Country of ref document: DE

Date of ref document: 19990211

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20070719

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20070725

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20070710

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20080724

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20080724