Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
  • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
  • D21H23/22—Addition to the formed paper
  • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
  • D21H23/34—Knife or blade type coaters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
  • B41M3/14—Security printing
• • 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
  • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
• • 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
• • 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
  • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
  • B41M5/506—Intermediate layers
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H19/00—Coated paper; Coating material
  • D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Definitions

• the invention relates to a sheet-like recording material in a translucent embodiment, which comprises a substrate and a recording layer provided on at least one side of the substrate for receiving recordings, and a pigmented marking formed between the substrate and the recording layer.
• the invention also includes a method for producing the recording material according to the invention.
• a watermark is generally understood to mean a drawing on paper that is caused by different paper thicknesses.
• a synthetic print medium with pseudo watermark comprises a substrate made of plastic, at least one authentication or security sign, preferably applied by gravure, which changes the opacity of the print carrier, and at least one printable pigment coating covering the sign.
• the monochrome or polychrome design should hardly be visible in reflected light, but should be clearly visible in transmitted light.
• the pseudo watermark printed on it can be forged relatively easily, which cannot be prevented by simple pigment coatings to be applied thereon.
• EP 0 844 097 A1 discloses as a first security feature in the form of a false watermark a latent image printed on the back of the recording material, which is produced by means of a security ink containing a fluorescent reagent.
• the security ink contains a water-repellent.
• the security ink containing the fluorescent reagent used as pigment or dye and the water-repellent is contained or dispersed in an aqueous carrier which, in addition to these components, may also contain a binder.
• Preprints are e.g. B. applied by means of offset printing form fields, the labeling of which is carried out in the intended use, for example by means of a thermal printer.
• EP 0 611 664 B1 discloses a real watermark in the support for a web-shaped recording material provided with a heat-sensitive coating. It is not always possible to correctly recognize the watermark in daylight viewing, making it difficult to identify. In addition, the devices required for production, e.g. the marking-specific egouture burdened with high investment costs.
• the invention sees its task in the development of a web-shaped recording material which has an authenticity-proofing security feature
• the present invention further sees its object in providing a method for producing a web-shaped recording material with authenticity-proofing security feature in accordance with the above statements.
• a sheet-like recording material in a translucent design which comprises a substrate and a recording layer provided on at least one side of the substrate for receiving recordings, and a pigmented marking formed between the substrate and the recording layer, characterized in that the pigmented marking is formed by an application of locally different thicknesses in the form of the marking of at least one continuous intermediate layer arranged between the substrate and the at least one recording layer.
• the markings of the web-shaped recording material are formed by locally thicker application of the pigmented intermediate layer in the form of the markings.
• Good results with regard to the problem to be solved, on which the invention is based, can be achieved if the locally thicker mar- Kations have a difference in thickness compared to the unmarked points of the intermediate layer in a range between 0.1 and 10 microns, a thickness difference in a range between 0.1 and 5 microns is particularly preferred.
• the continuous pigmented intermediate layer of the recording material according to the invention contains at least one binder based on a synthetic polymer, styrene-butadiene latex, for example, providing particularly good results.
• a synthetic binder with the admixture of at least one natural polymer represents a particularly suitable embodiment.
• the present invention uses pigments known from the prior art because of their oil absorption of at least 50 ml per 100 g, which are to be used alone or in a mixture. These include: calcined or non-calcined diatomaceous earth, aluminum oxide hydroxide, magnesium carbonate, silicon dioxide, calcium carbonate and precipitated calcium carbonate, titanium dioxide as well as calcined or uncalcified kaolin.
• the three last-mentioned pigments in particular produce particularly clear markings, which is why they are preferred.
• a particularly suitable embodiment is present with a binder-pigment ratio within the pigmented intermediate layer between 1:10 and 1:20.
• the continuous pigmented intermediate layer is preferably used in such recording materials according to the invention which have at least on one of their sides a receiving layer for receiving the recording for the ink jet printing process.
• a further embodiment provides that the recording material has a heat-sensitive recording layer, at least on its side intended for receiving the recording.
• a recording layer contains further customary additives for heat-sensitive recording layers, such as, inter alia, resins, waxes and stabilizers.
• a preferred embodiment provides such a heat-sensitive recording material with a protective layer applied to the heat-sensitive recording layer.
• a web-shaped recording material which has a pressure-sensitive SC (self-coloring) recording layer on the side provided for recording.
• SC recording layers have, in addition to other additives, in particular acceptors and microcapsules with color formers encapsulated therein, the color formers having a color-forming reaction with the acceptors when printed.
• the substrate is in translucent form, there are practically no restrictions with regard to the substrate to be used, for which, for example, different films are available.
• a particularly preferred embodiment is when the substrate of the recording materials according to the invention consists of paper. Without being restricted to this, a preferred range of the mass per unit area of the substrate is between 50 and 180 g / m 2 .
• the invention also includes a method for producing a web-shaped recording material according to the invention with a pigmented intermediate layer, in which this continuous intermediate layer is applied with a coater having a counter roller and the counter roller has depressions in the form of the markings to be formed.
• a coater having a counter roller and the counter roller has depressions in the form of the markings to be formed.
• the substrate is pressed under the pressure of the doctor blade into the engraved recess in the counter roll, which leads to a thicker application of the pigmented coating slip.
• blade-type coaters are used.
• the recording materials which have a continuous pigmented intermediate layer and are of locally different thicknesses, are provided with other security features that are already known, such as, for example, fluorescent security fibers inserted into the substrate or dyes applied to or applied to the substrate as evidence of authenticity and, if appropriate, evidence of counterfeiting Indicator substances which react with color formation with reagents to be applied to the recording materials can be combined in a suitable manner.
• security features such as, for example, fluorescent security fibers inserted into the substrate or dyes applied to or applied to the substrate as evidence of authenticity and, if appropriate, evidence of counterfeiting Indicator substances which react with color formation with reagents to be applied to the recording materials can be combined in a suitable manner.
• a paper web made of bleached and ground hardwood and softwood cellulose pulps is produced as substrate on a Fourdrinier paper machine with the addition of conventional admixtures in conventional quantities with a mass per unit area of 160 g / m 2 .
• the substrate is treated with a starch preparation of 0.3 g / m 2 using the duo coater mentioned.
• a heat-sensitive recording layer of 5.4 g / m 2 is applied to the intermediate layer in a separate coating machine.
• the heat-sensitive recording material thus produced is provided on its side containing the recording layer with a protective layer of 3.5 g / m 2 .
• the heat-sensitive recording papers produced in this way have a marking which is outstandingly recognizable in transmitted light, corresponding to the depressions in the counter-roller.

Landscapes

• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Paper (AREA)
• Heat Sensitive Colour Forming Recording (AREA)
• Machines For Laying And Maintaining Railways (AREA)
• Manufacturing Optical Record Carriers (AREA)

Applications Claiming Priority (1)

Publications (2)

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Family Applications (1)

Country Status (7)

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Family Cites Families (9)

• 2001
  • 2001-10-16 EP EP01274551A patent/EP1438194B1/fr not_active Expired - Lifetime
  • 2001-10-16 WO PCT/EP2001/011934 patent/WO2003033272A1/fr active IP Right Grant
  • 2001-10-16 ES ES01274551T patent/ES2248234T3/es not_active Expired - Lifetime
  • 2001-10-16 JP JP2003536037A patent/JP4026715B2/ja not_active Expired - Fee Related
  • 2001-10-16 US US10/492,878 patent/US6995117B2/en not_active Expired - Lifetime
  • 2001-10-16 DE DE50107391T patent/DE50107391D1/de not_active Expired - Lifetime
  • 2001-10-16 AT AT01274551T patent/ATE303904T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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