EP0274886B2 - Druckempfindliches Aufzeichnungsmaterial - Google Patents

Druckempfindliches Aufzeichnungsmaterial Download PDF

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Publication number
EP0274886B2
EP0274886B2 EP87311138A EP87311138A EP0274886B2 EP 0274886 B2 EP0274886 B2 EP 0274886B2 EP 87311138 A EP87311138 A EP 87311138A EP 87311138 A EP87311138 A EP 87311138A EP 0274886 B2 EP0274886 B2 EP 0274886B2
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EP
European Patent Office
Prior art keywords
coating
pigment
record material
parts
binder
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
EP87311138A
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English (en)
French (fr)
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EP0274886B1 (de
EP0274886A1 (de
Inventor
John Brian Cooper
Kevin James Clay
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Wiggins Teape Group Ltd
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Wiggins Teape Group Ltd
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Priority claimed from GB868630231A external-priority patent/GB8630231D0/en
Priority claimed from GB878723732A external-priority patent/GB8723732D0/en
Application filed by Wiggins Teape Group Ltd filed Critical Wiggins Teape Group Ltd
Priority to AT87311138T priority Critical patent/ATE51586T1/de
Publication of EP0274886A1 publication Critical patent/EP0274886A1/de
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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
    • B41M5/124—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
    • B41M5/124—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
    • B41M5/132—Chemical colour-forming components; Additives or binders therefor
    • 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
    • B41M5/165—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 characterised by the use of microcapsules; Special solvents for incorporating the ingredients

Definitions

  • the invention relates to paper for carbonless copy paper sets and to copy paper sets made up using it.
  • Carbonless copy paper sets consist of a top sheet known as the CB (coated back) sheet, a back sheet known as the CF (coated front) sheet, and optionally one or more intermediate sheets known as CFB (coated front and back) sheets.
  • the coatings of the back of the CB sheet, of the front and back of the CFB sheets if any, and of the front of the CF sheet contain materials that when brought into association with each other develop a coloured image.
  • the present invention has arisen from a requirement, in the highest grade products, for a pigment-containing coating on the front face of CB sheets, improving them in appearance and in printability.
  • the invention lies in record material comprising a paper CB sheet having on its front a printable pigment coating and on its back isolated droplets of colour former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises a binder for the pigment together with a synthetic reactive sizing agent and optionally also a coating structure agent.
  • the sizing agent is for example an alkyl ketene dimer alkenyl succinic anhydride, or other neutral reactive size. Another example is a polyurethane size.
  • the coating structure agent is for example a carboxy methyl cellulose, a soya or other protein, an alginate, or other hydrophilic polymer. The relative amounts of components in the coating are desirably by weight 60 - 95 parts pigment, 10 - 30 parts binder, 0.5 - 10 parts size and 0.5 - 5 parts coating structure agent where present.
  • pigment, binder and size are respectively 60 - 95 parts, 16 - 22 parts and 0.5 - 10 parts, or pigment, binder and coating structure agent are respectively 75 - 85 parts, 12 - 22 parts and 0.5 to 5 parts, with in the latter case 1 - 5 parts size being present also.
  • the invention further provides
  • the binder is present to hold the pigment in a non-dusting, printable coating, and to enable enough binder to be used for that purpose it must be a material that when tested at 40 weight % in water gives a fluid preparation mixable with pigment to give a coatable dispersion. Normally it will be a latex binder but for example hydroxyalkyl ether derivatives of starches are suitable. Auxiliary binder materials may also be included.
  • the size is used to hold off latex-based or other edge-padding adhesives to allow form sets to be fanned.
  • the coating structure agent is a hydrophilic polymer that provides a Bendtsen porosity of the finished i.e. CB coated sheet of not less than 25 ml/min, preferably more. Such porosities reflect porosities before CB coating of around 30 ml/min or more allowing economic application of the CB coating. Suitable materials are believed to act by gelling the pigment coating in the course of drying, preventing it from compacting into an impermeable layer, and all are materials that when tested in water at 25 weight % or more give a gel-like preparation not mixable with pigment to give a coatable dispersion.
  • the pigment coating should not nave any significant colour developing properties. Such properties would give rise to edge staining after sifting or sheeting, and possibly other marking arising from capsule rupture and release of colour former solution.
  • a well known use of copy paper sets is in the production of multiple sets or "form sets" as disclosed, for example, in EP-A 8 161.
  • repeats of the sequence of sheets, CB, optionally one or more CFB and CF, that constitute an individual set are made up as a stack.
  • An adhesive known as an edge padding adhesive, is applied down one side of the stack, its characteristic being that it is attracted to the coating of the back of the CB (and any CFB) sheets, or to the coating of the front of the CF (and any CFB) sheets, or to both, to a greater extent than to what are, conventionally, uncoated faces of the sheets in the stack, which are the fronts of the CB sheets and the backs of the CF sheets.
  • edge padding adhesive is applied down one side of the stack, its characteristic being that it is attracted to the coating of the back of the CB (and any CFB) sheets, or to the coating of the front of the CF (and any CFB) sheets, or to both, to a greater extent than to what
  • CB front face pigment coating would be thought of as incompatible with edge padding, the coating attracting the edge padding adhesive in the same way as the coatings within the sets.
  • the invention overcomes such problems. While of course the use of sizes in paper generally is known, and so is pigment coating and the use of binders to retain the pigment on the paper, there has been no reason to size a pigment coating as such. Indeed a pigment would normally be thought of as incompatible with size, using a lot of it to no purpose, and the success of the combination is surprising.
  • CB coatings containing colour former in relatively fragile (usually encapsulated) form, must in practice be applied after the coating of the front of the sheet.
  • Application involves use of driving rolls run at high speed with the paper tensioned over them and if air is not to be entrained between paper and roll the paper must have enough permeability for the air to escape. Without it the paper is liable to "hover" on a layer of air over the roll with loss of control of the process and variation in the product.
  • Running the coater at a lower speed to avoid the problem is unacceptable for production efficiency.
  • Increasing the tension to exclude the air is possible in theory but risks damage to the product, e.g. by more frequent breaks and/or curing or inferior aspect.
  • the pigment coating is typically highly consolidated to give a smooth surface.
  • the use of these highly consolidated coatings means that the sheet porosity of the paper is very low.
  • the adverse effects of this high content of binder are overcome by the presence in the coating mix of the coating structure agent, sufficient permeability for successful subsequent application of CB coatings being obtained.
  • the coating structure agent in the coating mix promotes the generation of a relatively porous coating. We believe that this arises because as the coating mix dries, the coating structure agent helps the mix to set or gel before all the water is removed, and that the set or gelled structure is, at least in part, preserved through drying to give a relatively bulky and thus porous coating. That this effect generates a porous coating even at the high binder levels typically used in this invention is very surprising as such binder levels would ordinarily be expected to "blind" the coating.
  • the pigments are, generally, conventional paper coating pigments, in particular inorganic or mineral-derived particulate materials.
  • Calcium carbonate especially is economic and suitable, giving good whiteness and purity and having good printing characteristics. It may be supplemented with coating clays such as china clay (kaolin), although with large amounts of clay care will be necessary in formulation to achieve satisfactory rheology and stability for successful coating, as will be appreciated by those skilled in the art.
  • Suitable pigments besides china clay include calcined clays, titanium dioxide, finely divided silica and talc.
  • Calcium carbonate contributes good whiteness and brightness, and high print definition, but on its own tends to give dusting on the surface and may not good good ink receptivity.
  • Clay or talc contribute to a good surface finish and give good ink receptivity without dusting but give a less white appearance.
  • Ground calcite as the calcium carbonate has high purity (to give whiteness etc. as compared with ground limestone or chalk) without the very high surface of precipitated carbonates, which can be used but are not preferred because of high binder demand arising from small particle size.
  • the pigment in the coatings is not such as to have colour developing properties.
  • specific colour developer materials such as the clays that are used as the active constituents of many CF coatings.
  • Kaolin has been mentioned in the literature as a colour developer but in unmodified form is not so used or suitable, and papercoating grades are essentially non-colour developing. The use of high levels of binder reduces even further or eliminates any minor residual colour developing activity of the raw material.
  • the particle size of the pigment is important. The finer the particles are the more effective the pigment is in terms of brightness but, equally, the more the coating is consolidated (thus reducing porosity) and also the more difficult sizing is; a balance is desirable and the range of 1 to 10 microns, advantageously 2 to 5 ⁇ m is preferred.
  • Such particle sizes are as measured by a laser particle sizer such as the standard Malvern 3600 E Type. For particles of broadly the same dimensions in any direction, such as those of calcium carbonate, such sizes approximate actual sizes; for flat or elongated particles such as those of coating clays the particles sizes as measured are nominal.
  • the laser instrument assesses particle size by measuring the interference pattern arising from diffraction of the laser light illuminating a sample suspension e.g. in water, of the particles. The pattern is manipulated by a computer to give results as particle size by volume, e.g. the volume itself or the diameter of spheres of equal volume.
  • Amounts of pigment are given earlier. Small quantities say up to 10% of specialist pigments, for example TiO 2 whitener, can conveniently by included.
  • the binder may be selected from among those conventional in themselves in paper coating technology.
  • it may be a synthetic rubber latex such as styrene butadiene latex (normally a carboxylated grade to give good dispersibility and stability in water) or styrene acrylic latex.
  • styrene butadiene latex normally a carboxylated grade to give good dispersibility and stability in water
  • styrene acrylic latex styrene acrylic latex.
  • it is also however possible for it to be for example an ether derivative of starch, as already mentioned, and these are not conventional in the sense of being in wide use.
  • the size will typically be a neutral reactive size such as an alkyl ketene dimer or alkenyl succinic anhydride with the alkyl or alkenyl groups from C 8 upwards, generally from C 12 upwards, with C 15 - C 18 typical and the upper limit determined, for example C 24 , by mix workability and suitability of the final coating for printing.
  • a neutral reactive size such as an alkyl ketene dimer or alkenyl succinic anhydride with the alkyl or alkenyl groups from C 8 upwards, generally from C 12 upwards, with C 15 - C 18 typical and the upper limit determined, for example C 24 , by mix workability and suitability of the final coating for printing.
  • Such sizes in which "neutral” connotes effectiveness as sizes at neutral coating mix pH, are effective in small quantities and readily provide acceptable rheology in the coating process, for example blade, roll or slot (extrusion) coating as known per se .
  • Other synthetic sizes such as polyurethane sizes may however be used
  • the water repellency of the coating is defined in terms of the contact angle taken up by a water droplet on the surface of the coated paper, measured within the drop, which for a size to be suitable is above 70° and advantageously above 90° or 100°.
  • a convenient method of determining the contact angle depends on measurement of the observed height and contact width of a droplet of known volume applied to the paper, in particular in a Lorentzen & Wettre No. 28 surface wettability tester. The method is as follows:-
  • the coating structure agents that are suitable include in particular carboxy methyl cellulose such as is used in coating technology as a dewatering control.
  • Other suitable materials are proteins, such as soya protein, and alginates such as sodium alginate, their essential characteristic being to provide the desired porous mating structure at the low amounts specfied.
  • the amounts used, within the overall range, depend on the nature of the material, enough to be effective but not so much as to increase viscosity or modify the rheology to make the mix uncoatable.
  • Amounts are typically, weight % on coating: Amounts are typically, weight % on coating: Carboxy methyl cellulose high mol.wt. 0.5-1.5% medium mol.wt. 1-2% low mol.wt. 2-3% Sodium alginate 0.7-1.5% Soya protein 1.5-4%
  • agents for example sodium hydroxide or other alkalis such as potassium hydroxide or ammonia for pH adjustment, and further components of the final coating such as optical brightening agents, dispersants for the pigments, lubricants (e.g. calcium stearate) or antifoams.
  • Coat weights may conveniently be 2 to 20 g/m 2 , advantageously 3 to 15 g/m 2 . Papers of reduced substance compared to normal, in terms of fibre weight per square metre, may be used compensating in part for the extra cost of the coatings.
  • CB coating the Bendtsen porosity of the final product is not less than 25 ml/min and preferably not less than 30 ml/min with (for this product) a typical range of 35 - 50 ml/min.
  • "High speed" is ca.500 m/min or above and a preferred lower limit 400/450 m/min.
  • a typical range is ca. 600 - 900 m/min and higher speeds e.g. up to 1500 m/min are possible.
  • the invention is described broadly above, but most desirably provides a CB sheet with a printable front coat at 2 - 20g/m 2 comprising an inorganic or mineral derived pigment and a latex-derived binder together with a sizing agent, the sizing agent being an alkyl ketene dimer or alkenyl succinic anhydride or other reactive neutral size giving a contact angle of 90° or more.
  • a sizing agent being an alkyl ketene dimer or alkenyl succinic anhydride or other reactive neutral size giving a contact angle of 90° or more.
  • Preferred proportions of components by weight are pigment 60 - 95 parts, binder 5 - 30 advantageously 16 - 22 and size 0.5 - 10 parts.
  • a coating material was prepared from the following components 48.2% solids in water, final pH 9.5. Material Parts by wt. Coating structure agent 0.8 Sodium hydroxide (first batch) 0.2 Calcium carbonate pigment 60.1 China clay pigment 20.0 Latex binder 16.0 Optical brightener 0.8 Sodium hydroxide (remainder) 0.1
  • the coating mix so prepared was applied using trailing blade metering to standard base paper of 48 g/m 2 substance for 'Idem' (Trade Mark) CB sheet to give coat weights of 3 to 7 g/m 2 .
  • the coated paper was then calendered and its porosity checked and found to be at a suitable figure. It was CB coated at 800 m/min using a 3 roll coater head, solids of the coating mix ca. 24%, constitution of solids:
  • the resulting CB sheets had excellent printing characteristics and improved visual appeal and feel in terms of formation and roughness.
  • a coating material was prepared from the following components, made up to 3308 Kg with water Component Dry weight (kg) Approx. % of dry weight "Dispex” N40 (40% in water) dispersing agent 3.6 0.2 "Hydrocarb” 70 calcium carbonate pigment 1275 64.5 Sodium hydroxide (30% in water) 2.4 0.12 "Alphatex” calcined kaolin (china clay) pigment 300 15.2 Carboxymethyl cellulose coating structure agent 24 1.2 “Revinex” 98 F10 latex (50% solids in water) 360 18.2 "Nopcote” C104 (50% in water) calcium stearate 10 0.5
  • Revinex 98 F10 latex is a carboxylated SBR latex ex Doverstrand Limited. 'Dispex', 'Hydrocarb', 'Alphatex', 'Revinex' and 'Nopcote' are trade marks.
  • This coating was applied to a conventional CB base paper containing 'Leucophor' (Trade Mark) LN optical brightener which after checking porosity was given a CB coating as before.
  • Examples 1 and 2 were repeated with respectively 2 parts by weight and 24 Kg of 'Aquapel' (Trade Mark) 360 ⁇ 3 neutral C 16 alkyl ketene dimer size (the level used being such as to give a final coating contact angle of 110° Papers of excellent printability and, further, edge paddable with 100% fanning were obtained.
  • 'Aquapel' Trade Mark 360 ⁇ 3 neutral C 16 alkyl ketene dimer size
  • Example 2 The formulations were made and coated as in Example 1, the calcium carbonate being of 4 microns median particle size, at 3 and 6 g/m 2 ,on the rougher side of 'Idem' base paper as used in Example 1.
  • Material Dry parts Mix 1 Calcium carbonate 100 Total Binder 22 55% solids Coating structure agent 1 pH 9.5 Size 2.5 Optical brightener 1 Mix 2 Calcium carbonate 75 Total China clay 25 50% solids Binder 20 pH 9.5 Coating structure agent 1 Size 2.5 Optical brightener 1 Mix 3 Calcium carbonate 50 Total China clay 50 47% solids Binder 20 pH 9.5 Coating structure agent 1 Size 3.7 Optical brightener 1
  • form sets were made up using a latex-based adhesive with CB, 2 ⁇ CFB, and CF sheets, the CFB and CF sheets being standard 'Idem' production and the CB sheets being either standard 'Idem' production base, for comparison, or the Mix 1, 2 and 3 papers above. All sets fanned apart 100%. Bonding strengths within sets, on a subjective 1 to 5 scale (too weak, slightly weak, optimum, slightly strong, too strong) were acceptable throughout, the CB-CF bond in particular, though a little less strong with the Mix 1, 2 and 3 papers than with the base, giving no problem through the presence of the front coating.
  • the formulations were coated onto base paper as in Example 1, the machine speed being 400 m/min, and measurements made of important properties.
  • the following table shows the mix viscosity of the coating mix, together with porosity before and after application of the CB coat, contact angle, and Bendtsen roughness.
  • Test Results - Example 8 Example Coat Mix Viscosity (cPs) Porosity before CB (ml/min) Porosity after CB (ml/min) Contact Angle (Degrees after 2 seconds) Roughness (Bendtsen) 8-C 520 31.5 25.0 77.6 119.0 8-2 505 38.3 13.0 79.0 100.0 8-5 800 25.2 26.0 108.9 125.0 8-7 525 27.3 26.5 79.1 132.0 8-10 195 55.2 60.4 89.8 150.0 8-11 102 25.0 23.0 95.8 146.0
  • edge padding trials were carried out as before, with bond strengths found normal or slightly low (but still within-specification) CB-CFB and CFB-CF and 100% fan apart.
  • Printing trials again carried out as before, gave good results, the ink on this occasion being Bonsfield Constat Black 30862 (Trade Mark). Ink density was good (slightly light in the absence of the coating structure agent), piling was absent, dusting acceptable throughout and in the mix with starch ether binder exceptionally low.
  • a coat mix was made up as an Example 8-C but with the Aquapel 360X replaced by 3.6 parts by weight of 'Fibran 71' (Trade Mark) from National Starch & Chemical Co., which is an alkenyl succinic anhydride size, the other components being in relative parts by weight as shown there, and coated as before.
  • 'Fibran 71' Trade Mark
  • a satisfactory coating was given, the measured contact angle in particular being 104°, well suited to edge padding.

Claims (17)

  1. Aufzeichnungsmaterial umfassend ein Papier-CB-Blatt mit einer druckfähigen Pigmentbeschichtung auf seiner Vorderseite und isolierten Tröpfchen einer Farbbildnerlösung auf seiner Rückseite, jeweils angeordnet innerhalb einer durch Druck zerbrechlichen Barriere, worin die Pigmentbeschichtung ein Bindemittel für das Pigment zusammen mit einem synthetischen reaktiven Leimungsmittel und gegebenenfalls einem Beschichtungsstrukturmittel umfaßt.
  2. Aufzeichnungsmaterial nach Anspruch 1, worin das Leimungsmittel ein Alkylketendimer, Alkenylsuccinanhydrid oder ein anderer neutraler reaktiver Leim ist.
  3. Aufzeichnungsmaterial nach Anspruch 1, worin das Leimungsmittel ein Polyurethan-Leim ist.
  4. Aufzeichnungsmaterial nach einem der vorhergehenden Ansprüche, enthaltend ein Leimungsmittel, worin die Wasserabstoßung der Pigmentbeschichtung, ausgedrückt als Kontaktwinkel eingenommen von einem Wassertropfen auf der Oberfläche des beschichteten Papiers, mehr als 90° und vorteilhaft oberhalb 100° liegt.
  5. Aufzeichnungsmaterial nach einem der vorhergehenden Ansprüche, worin das Beschichtungsstrukturmittel eine Carboxymethylcellulose, ein Soja- oder anderes Protein, ein Alginat oder ein anderes hydrophiles Polymer ist.
  6. Aufzeichnungsmaterial nach einem der vorhergehenden Ansprüche, worin das Bindemittel ein synthetisches Gummilatexbindemittel, vorzugsweise ein Styrolbutadien- oder Styrolacryllatex ist.
  7. Aufzeichnungsmaterial nach einem der Ansprüche 1 bis 5, worin das Bindemittel ein Hydroxyalkylether-Stärke-Derivat ist.
  8. Aufzeichnungsmaterial nach einem der vorhergehenden Ansprüche, worin die relativen Mengen der Komponenten bezogen auf das Gewicht 60 bis 95 Teile Pigment, 10 bis 30 Teile Bindemittel, 0,5 bis 10 Teile Leim und 0,5 bis 5 Teile Beschichtungsstrukturmittel, wo vorhanden, sind.
  9. Aufzeichnungsmaterial nach Anspruch 8, worin die relativen Mengen von Pigment, Bindemittel und Leim respektive 60 bis 95 Teile, 16 bis 22 Teile und 0,5 bis 10 Teile sind.
  10. Aufzeichnungsmaterial nach Anspruch 8, worin das Beschichtungsstrukturmittel vorhanden ist und die relativen Mengen von Pigment, Bindemittel, Leim und Beschichtungsstrukturmittel respektive 75 bis 85 Teile, 12 bis 22 Teile, 1 bis 5 Teile und 0,5 bis 5 Teile sind.
  11. Aufzeichnungsmaterial nach einem der vorhergehenden Ansprüche, worin das Schichtgewicht der Vorderseitenbeschichtung 2 bis 20 g/m2, bevorzugt 3 bis 15 g/m2 ist.
  12. Aufzeichnungsmaterial nach einem der vorhergehenden Ansprüche, worin das Pigment ein anorganisches oder Mineral-abgeleitetes teilchenförmiges Material, bevorzugt Calciumcarbonat umfaßt.
  13. Aufzeichnungsmaterial nach einem der vorhergehenden Ansprüche, worin die Teilchengröße des Pigments im Bereich zwischen 1 und 10 µm, bevorzugt 2 und 5 µm liegt.
  14. Aufzeichnungsmaterial nach einem der vorhergehenden Ansprüche, worin der Leim ein Alkylketendimer oder Alkenylsuccinanhydrid mit Alkyl oder Alkenylgruppen von C8 aufwärts, bevorzugt von C12 aufwärts und mit einem Maximum von C24 ist.
  15. Sets mit verschiedener Form, die jeweils ein CB-Blatt, ein CF-Blatt und gegebenenfalls ein oder mehrere CFB-Blätter enthalten und ein Kantenpolsteradhäsiv (edge padding adhesive) tragen, um die Blätter in den Sets und die Sets miteinander zu verbinden, worin das CB-Blatt aus dem Aufzeichnungsmaterial nach einem der vorhergehenden Ansprüche ist, wobei das Leimungsmittel vorhanden ist, um zu ermöglichen, daß die Sets ohne Trennung der Blätter in den Sets aufgefächert werden können.
  16. Verfahren zur Herstellung eines Aufzeichnungsmaterials, umfassend ein Papierblatt mit einer druckfähigen Pigmentbeschichtung auf seiner Vorderseite und isolierten Tröpfchen einer Farbbildnerlösung auf seiner Rückseite, jeweils angeordnet innerhalb einer durch Druck zerbrechlichen Barriere, wobei zum Zweck einer Hochgeschwindigkeitsaufbringung der CB-Beschichtung anschließend an die Aufbringung der pigmentierten Beschichtung man das Papierblatt mit einer Mischung, enthaltend ein Bindemittel für das Pigment zusammen mit einem Beschichtungsstrukturmittel, wobei auch ein synthetisches reaktives Leimungsmittel anwesend ist, in einem wäßrigen Medium mit 25 bis 75 %, vorzugsweise 50 bis 65 % Feststoffen, bezogen auf das Gewicht der Mischung, beschichtet, trocknet, um ein beschichtetes Blatt mit einer Bendtsen-Porosität von 25 bis 30 ml/min oder mehr zu erhalten, und auf der Rückseite bei 400 bis 450 m/min oder mehr mit einer Farbbildner-Beschichtungsformulierung beschichtet, um das Aufzeichnungsmaterial zu erhalten.
  17. Verfahren nach Anspruch 16, worin die Komponenten der Pigmentbeschichtung derart sind, daß sie ein Aufzeichnungsmaterial nach einem der Ansprüche 2 bis 14 ergeben.
EP87311138A 1986-12-18 1987-12-17 Druckempfindliches Aufzeichnungsmaterial Expired - Lifetime EP0274886B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87311138T ATE51586T1 (de) 1986-12-18 1987-12-17 Druckempfindliches aufzeichnungsmaterial.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB868630231A GB8630231D0 (en) 1986-12-18 1986-12-18 Pressure sensitive record material
GB8630231 1986-12-18
GB8723732 1987-10-09
GB878723732A GB8723732D0 (en) 1987-10-09 1987-10-09 Pressure sensitive record material

Publications (3)

Publication Number Publication Date
EP0274886A1 EP0274886A1 (de) 1988-07-20
EP0274886B1 EP0274886B1 (de) 1990-04-04
EP0274886B2 true EP0274886B2 (de) 1997-07-02

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Application Number Title Priority Date Filing Date
EP87311138A Expired - Lifetime EP0274886B2 (de) 1986-12-18 1987-12-17 Druckempfindliches Aufzeichnungsmaterial

Country Status (10)

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EP (1) EP0274886B2 (de)
JP (1) JP2583118B2 (de)
AT (1) ATE51586T1 (de)
AU (1) AU613336B2 (de)
CA (1) CA1316957C (de)
DE (3) DE274886T1 (de)
ES (1) ES2015062T5 (de)
FI (1) FI885711A0 (de)
GB (1) GB2209355B (de)
WO (1) WO1988004614A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2049819T3 (es) * 1988-07-01 1994-05-01 Wiggins Teape Group Ltd Papel de copia sensible a la presion.
DE3919736C1 (de) * 1989-06-16 1991-01-17 Feldmuehle Ag, 4000 Duesseldorf, De
FR2648395B1 (fr) * 1989-06-19 1992-02-21 Arjomari Prioux Materiau d'enregistrement sensible a la pression ayant une bonne imprimabilite et pouvant former des liasses par encollage autoseparant, ainsi qu'une feuille autocopiante sensible a la pression et une liasse de feuillets autocopiants obtenue par encollage autoseparant
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ES2015062T5 (es) 1997-10-01
DE274886T1 (de) 1988-11-24
GB8825451D0 (en) 1989-01-05
GB2209355B (en) 1991-06-12
EP0274886B1 (de) 1990-04-04
CA1316957C (en) 1993-04-27
JPH01500895A (ja) 1989-03-30
ATE51586T1 (de) 1990-04-15
GB2209355A (en) 1989-05-10
JP2583118B2 (ja) 1997-02-19
FI885711A (fi) 1988-12-09
WO1988004614A1 (en) 1988-06-30
EP0274886A1 (de) 1988-07-20
DE3790830T1 (de) 1988-12-08
FI885711A0 (fi) 1988-12-09
AU613336B2 (en) 1991-08-01
AU1050788A (en) 1988-07-15
ES2015062B3 (es) 1990-08-01
DE3762106D1 (de) 1990-05-10

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