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
  • B41M5/50—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
• • 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
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/913—Material designed to be responsive to temperature, light, moisture
• • 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
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/914—Transfer or decalcomania
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/31909—Next to second addition polymer from unsaturated monomers
  • Y10T428/31928—Ester, halide or nitrile of addition polymer
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/31935—Ester, halide or nitrile of addition polymer

Definitions

• the invention relates to an image-receiving material for thermal dye transfer and a method for its production.
• D2T2 dye diffusion thermal transfer
• thermal dye transfer The principle of thermal dye transfer is that the digital image is processed with regard to the primary colors cyan, magenta, yellow and black and converted into corresponding electrical signals. These signals are forwarded to a thermal printer and converted into heat. Due to the action of heat, the dye sublimes from the donor layer of an ink ribbon (ink sheet) in contact with the receiving material and diffuses into the receiving layer.
• ink ribbon ink sheet
• a receiving material for thermal dye transfer generally consists of a carrier with a receiving layer applied to its front.
• other layers are often applied to the front of the carrier. These include barrier, separating, adhesive and protective layers.
• Plastic films such as. B. polyester film or a resin-coated paper advertise.
• the receiving layer generally contains a thermoplastic resin which has an affinity for the dye from the ink ribbon.
• a thermoplastic resin which has an affinity for the dye from the ink ribbon.
• these include linear polyesters, e.g. Polyethylene terephthalate, polybutylene terephthalate or acrylic resins, e.g. Polymethyl methacrylate, polybutyl methacrylate, polymethylacrylate, etc.
• polystyrene, polycarbonate, polyvinylpyrrolidone, ethyl cellulose, polysulfone and other plastics can be used as the dye-absorbing resin.
• JP 02 70 487 claims a receiving layer containing a vinyl chloride / vinyl acetate copolymer as a binder, which is to ensure high density of the transferred image, and the incorporation of silicone oil in this layer is said to provide good "anti-blocking" - Properties can also be achieved.
• a disadvantage of this receiving material is the lack of line sharpness of the transferred image and the application of the layer from a solvent environment.
• the present invention is therefore based on the object of developing an image-receiving material for thermal dye transfer processes which is free from the disadvantages described above.
• the receiving material to be developed should be heat and light stable and insensitive to pressure, have good flatness and good "anti-blocking" properties. In addition, a very good color density and line sharpness should be achieved with the receiving material.
• an ink-receiving layer on the front of a polyolefin-coated base paper, which is a combination of a plasticizer-containing one Contains vinyl chloride / vinyl acetate copolymer and a hard polymeric blending component based on vinyl chloride.
• Combination creates a receiving sheet that not only fulfills the requirements listed at the beginning, but also enables a high color density of the transmitted image while increasing the gradation (color gradation) and line sharpness.
• a vinyl chloride / vinyl acetate copolymer with a phthalic acid ester, in particular dibutyl phthalate is used as the plasticizer.
• a phthalic acid ester in particular dibutyl phthalate
• Other compatible plasticizers such as. B. trimellitic acid esters can be used.
• a vinyl chloride / (meth) acrylic ester copolymer in particular a vinyl chloride / methyl methyl ester copolymer, is preferably used as a hard polymeric blending component based on vinyl chloride.
• the ratio of vinyl chloride / vinyl acetate copolymer to the hard blending component is 90:10 to 30:70, in particular 70:30 to 40:60.
• the content of the plasticizer in the vinyl chloride / vinyl acetate copolymer is between 1 and 45% by weight (based on the dry weight of the layer), in particular 2 to 23% by weight.
• the color receiving layer for the receiving material according to the invention can additionally contain pigments, matting agents, wetting agents, release agents and other additives.
• a release layer can be applied to the receiving layer in an amount of 0.1 to 1 g / m2, in particular 0.4 to 0.8 g / m2.
• the separating layer can consist of a silicone oil, a cross-linked polysiloxane or a low molecular weight polyethylene.
• the ink receiving layer (as an aqueous dispersion) can be used with the help of all common application and dosing processes, e.g. B. roller application, engraving or nipping process on a substrate, for. B. coated or uncoated paper can be applied.
• the application amount of the ink receiving layer is 0.3 - 15 g / m2, preferably 1 to 10 g / m2.
• polyolefin e.g. Polyethylene coated paper
• the polyolefin layer having a basis weight of at least 5 g / m2.
• the polyolefin layer can contain pigments such as e.g. B. TiO2 in its rutile or anatase form and other additives.
• the front of a polyethylene-coated base paper *) was coated with an aqueous dispersion of the following composition: *)
• a base paper with a PE coating on both sides and a basis weight of 180 g / cm2 was used.
• the back of the base paper was coated with clear polyethylene, which is a mixture of LDPE and HDPE (55% HDPE, 45% LDPE).
• the amount of PE applied was 15 g / m2.
• product Composition % by weight 1a 1b 1c 1d 1e VCl / VAc copolymer (25% by weight plasticizer, based on resin) 50% in water (Vinnol 50 / 25C, from Wacker) 80 70 50 50 50 40 VCl / AME copolymer (hard blending component) 50% in water (Lutofan 100 D, BASF) 20th 30th 50 50 60 Order quantity, g / m2 5 0.5 5 10th 5 VCl / VAc copolymer: vinyl chloride / vinyl acetate cop. VCl / AME copolymer: vinyl chloride / acrylic acid methyl ester
• the receiving material obtained was printed using the thermal image transfer method and then analyzed.
• the results are summarized in Table 1.
• a PE-coated base paper as in Example 1 was coated with an aqueous dispersion of the following composition: product Composition,% by weight 2a 2 B 2c VCl / VAc copolymer (5% by weight plasticizer, based on resin) 50% in water 50 - - VCl / VAc copolymer (15% by weight plasticizer, based on resin) 50% in water - 50 - VCl / VAc copolymer (25% by weight plasticizer, based on resin) 50% in water - - 50 VCl / AME copolymer (hard blending component) 50% in water 50 50 50 Order quantity, g / m2 5 5 5 5
• the receiving material obtained was printed using the thermal image transfer method and then analyzed.
• the results are summarized in Table 2.
• a PE-coated base paper was coated according to Example 1 with an aqueous dispersion of the following composition: product Composition,% by weight 3a 3b 3c VCl / VAc copolymer (25% by weight plasticizer based on resin) 50% in water 49.5 49.5 70.0 VCl / AME copolymer 50% in water 49.5 49.5 29.0 Polytetrafluoroethylene (release agent) 30% in water 1.0 2.0 1.0 Order quantity, g / m2 5 10th 5
• the receiving material obtained was printed using the thermal image transfer method and then analyzed.
• the results are summarized in Table 3.
• the receiving material according to Example 1c was coated with an aqueous emulsion and then dried.
• the application weight of the separating layer obtained in this way was 0.5 g / m2.
• the receiving material obtained was printed using the thermal image transfer method and then analyzed.
• the results are summarized in Table 3.
• a PE-coated base paper was coated as in Example 1 with an aqueous dispersion of the following composition: product Composition,% by weight V1a V1b VCl / VAc copolymer (25% by weight plasticizer based on resin) 50% in water 100 - VCl / VAc copolymer (without plasticizer) 50% in water - 50 VCl / AME copolymer 50% in water - 50 Order quantity, g / m2 10th 10th
• the receiving material obtained after drying was printed using the thermal image transfer method and then analyzed.
• the results are summarized in Table 4.
• the image receiving material according to the invention was subjected to a thermal image transfer process.
• a color video printer VY-25 E from Hitachi was used using a Hitachi ink ribbon.
• the video printer has the following technical data: Image storage PAL 1 full screen memory Printed image 64 color image elements: 540: 620 points Printing time 2 minutes / picture
• the density measurements were carried out before and after a 24-hour exposure of the images using a xenon lamp.
• the device used for this was an original reflection densitometer SOS-45.
• the measurements were carried out for the basic colors cyan, magenta, yellow and black.
• the number of possible color gradations (gradation, from 0 - 7) is also included in the tables.
• the line sharpness was determined on the basis of test images printed in the basic colors.
• the test image shows straight lines that are printed both horizontally and vertically.
• the measurement is carried out with a thread counter at three measuring points.
• the arithmetic mean is calculated from this. The smaller the measured value of the stroke width, the higher the sharpness of the image.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Thermal Transfer Or Thermal Recording In General (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

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• 1991
  • 1991-08-14 DE DE4126864A patent/DE4126864C1/de not_active Expired - Fee Related
• 1992
  • 1992-06-04 EP EP19920109520 patent/EP0527304B1/de not_active Expired - Lifetime
  • 1992-08-13 JP JP21603592A patent/JP3187154B2/ja not_active Expired - Lifetime
• 1995
  • 1995-03-20 US US08/406,711 patent/US5518985A/en not_active Expired - Lifetime

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