EP0318804B1 - Multilayer flexible transfer ribbon - Google Patents

Multilayer flexible transfer ribbon Download PDF

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Publication number
EP0318804B1
EP0318804B1 EP88119402A EP88119402A EP0318804B1 EP 0318804 B1 EP0318804 B1 EP 0318804B1 EP 88119402 A EP88119402 A EP 88119402A EP 88119402 A EP88119402 A EP 88119402A EP 0318804 B1 EP0318804 B1 EP 0318804B1
Authority
EP
European Patent Office
Prior art keywords
transfer
layer
transfer ribbon
ribbon according
transfer 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
EP88119402A
Other languages
German (de)
French (fr)
Other versions
EP0318804A3 (en
EP0318804A2 (en
Inventor
Ernst Kunkel
Petra Bubolz
Wolfhard Rutz
Sigo Muschter
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.)
Henkel Pritt Produktions GmbH
Original Assignee
Pelikan GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pelikan GmbH filed Critical Pelikan GmbH
Priority to AT8888119402T priority Critical patent/ATE104603T1/en
Publication of EP0318804A2 publication Critical patent/EP0318804A2/en
Publication of EP0318804A3 publication Critical patent/EP0318804A3/en
Application granted granted Critical
Publication of EP0318804B1 publication Critical patent/EP0318804B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/025Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/03Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H37/00Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
    • B65H37/002Web delivery apparatus, the web serving as support for articles, material or another web
    • B65H37/005Hand-held apparatus
    • B65H37/007Applicators for applying coatings, e.g. correction, colour or adhesive coatings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/26Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling
    • B41J29/36Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling for cancelling or correcting errors by overprinting
    • B41J29/367Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling for cancelling or correcting errors by overprinting sheet media carrying a pigmented transferable correction layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/10Duplicating or marking methods; Sheet materials for use therein by using carbon paper or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40Thermography ; 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/16Correction processes or materials

Definitions

  • the invention relates to a multilayer, flexible transfer tape with an auxiliary carrier and a pressure-sensitive adhesive layer, a binder-containing transfer layer being present between the auxiliary carrier and the pressure-sensitive adhesive layer, which has a stronger adhesion to the pressure-sensitive adhesive layer than to the auxiliary carrier.
  • various possibilities have been known according to which pigmented liquid systems can be used to cover incorrect written representations.
  • white pigmented dispersions containing a volatile organic solvent are applied with a brush to correct characters and the like. Evaporation of the volatile organic solvent leads to environmental pollution. You must wait a relatively long time before the evaporation is complete and a new overwrite is possible. Applying the correction dispersions with a brush usually does not provide an even top coat.
  • GB-A-1 036 743 describes a multilayer transfer sheet which has a color-releasing layer between a base layer with a plastic binder and a cover layer with a binder made of plastic and / or waxes. Ethyl cellulose can be incorporated into the color-releasing layer. Such a transfer sheet should be usable in writing programs.
  • the invention was based on the object of further developing the transfer belt mentioned at the outset so that the binder-containing transfer layer can be applied cleanly and with sharp edges to the area or area to be covered (also over a large area) and can be used in a rolled-up form in a hand-held device for simple, fast and uniform use Application to the respective substrate is possible, with stringing of the pressure-sensitive adhesive layer should be excluded when tearing.
  • the binder-containing transfer layer contains 0.5 to 5% by weight of a soluble cellulose derivative as a tear-off aid.
  • the auxiliary carrier of the flexible transfer belt according to the invention preferably consists of a plastic film, as is used for the carriers of typewriter ribbons, e.g. made of polyethylene terephthalate, polypropylene, polyethylene, polyvinyl chloride, polycarbonate. Silicone-coated paper has also proven to be suitable as an auxiliary carrier.
  • the silicone coating leads to a reduction in the adhesive tension between the binder-containing transfer layer and the auxiliary carrier.
  • the silicone coating can also be replaced by other non-stick agents, such as polytetrafluoroethylene.
  • the auxiliary carrier preferably has a thickness of 10 to 60 ⁇ m, in particular 15 to 55 ⁇ m, the cover layer a thickness of 5 to 40 ⁇ m, in particular 15 to 25 ⁇ m, and the pressure-sensitive adhesive layer a thickness of 1 to 8 ⁇ m, in particular 2 to 5 ⁇ m.
  • a thickness ratio of the pressure-sensitive adhesive layer to the transfer layer of 1: 4 to 1:12, in particular 1: 8 to 1:10, is expediently chosen.
  • the pressure sensitive adhesive layer can consist of commercially available pressure sensitive adhesives. These are materials that are elastic and permanently adhesive self-adhesive compositions with high adhesive forces and that adhere immediately to the various surfaces even under low pressure at room temperature. They are preferably in aqueous solution applied to the transfer layer already on the auxiliary carrier, since the already formed binder-containing transfer layer is not dissolved again. Among pressure-sensitive adhesives of this type, those based on acrylate are particularly advantageous.
  • the starting materials can be viscous solutions or dispersions based on rubber, polyacrylates, polyvinyl ethers or polyvinyl isobutylene. Materials based on polyacrylates are preferred.
  • the pressure-sensitive adhesive material to be applied which is regularly present in an aqueous medium, preferably contains wetting agents or surfactants (sold under the trade name Byk W).
  • the above-mentioned solutions or dispersions of the pressure sensitive adhesive for forming the pressure sensitive adhesive layer are preferably applied to the transfer layer in an amount of 1 to 5 g / m2, very particularly preferably in an amount of 2 to 4 g / m2.
  • the type of plasticizer used should also be considered when choosing the respective binder for forming the transfer layer.
  • a plasticizer should be used which, when the transfer layer is applied to the surface to be corrected or to be covered, does not penetrate through the normally thin pressure-sensitive adhesive layer and comes into contact with the area to be corrected or the colorants located there, and this is more troublesome Way, coloring the transfer layer.
  • common plasticizers such as silicone, castor and mineral oil are suitable for this.
  • plasticizers preferred in other areas of application such as phthalic acid esters and oleic alcohol, are not equally suitable.
  • a so-called ⁇ varnish agent '' can be incorporated into the binder-containing transfer layer, which may migrate or make insoluble colorants so that they do not migrate into the applied transfer layer and color it again.
  • Suitable varnishing agents include tannin and tannin derivatives.
  • lacquering agents as are known from the technical field of inks and inks, can be used. They should preferably be present in the binder-containing transfer layer in an amount of 0.5 to 5% by weight, in particular 1.5 to 3.5% by weight. The value of 2 to 2.5% by weight is very particularly preferred.
  • the binder chosen in each case for forming the transfer layer is preferably transferred into a solution or used as a dispersion in the presence of a polymer dispersion.
  • the choice of solvent depends on the type of binder used.
  • Low to medium-boiling organic solvents from the group of alcohols, such as ethanol, isopropanol and butanol, the ketones, such as acetone and methyl ethyl ketone, the esters, such as methyl and ethyl acetate, the aromatic hydrocarbons such as toluene and the aliphatic hydrocarbons, such as, are preferably used Petrol in the boiling range of 70 to 140 ° C, alone or in a mixture, as well as water, alone or in a mixture with low-boiling, water-soluble organic solvents.
  • the concentration of the binder in the solution or dispersion is not essential to the invention.
  • this solution or dispersion is preferably applied to the auxiliary carrier in an amount of 15 to 25 g / m2 and very particularly preferably between 18 and 22 g / m2.
  • the term “colorant” is to be understood as far as possible. It is supposed to be the collective name for all coloring substances, so that this includes dyes and pigments, the latter also having a filler character. Dyes are to be understood as meaning those colorants which are soluble in water, organic solvents or binders and which are opposed by the insoluble pigments. The coloring can be present immediately, but can only appear through fluorescence. The latter applies, for example, to fluorescent fluorescent colors. If the transfer belt according to the invention is used for the correction of characters and pictorial representations and the like, the binder-containing transfer layer contains in particular white pigments, such as titanium white, precipitated chalk, clay or colloidal silicas.
  • inorganic pigments such as chrome yellow, ocher, iron oxide red, cobalt blue, ultramarine, Berlin blue, or organic pigments such as alkali blue, phthalocyanines, azo dyes, anthraquinones, metal complex pigments as well as carbon blacks and iron oxide black are used as colorants , used.
  • organic pigments such as alkali blue, phthalocyanines, azo dyes, anthraquinones, metal complex pigments as well as carbon blacks and iron oxide black are used as colorants , used.
  • fluorescent dyes are: Blaze Orange T 15 from Dayglo, Maxilonbrillantflavin 10 GFF from Ciba Geigy, pyranine from Bayer AG and Basonyl-Red 540 from BASF.
  • the optimum covering function of the transfer belt according to the invention in particular that of the transfer layer containing the binder, can be controlled by the pigment content.
  • the optimal pigment content depends on various factors, such as the type of binder chosen, the pigment itself and the other additives incorporated. A particularly critical value or critical range cannot be specified.
  • the binder / pigment relationship could give a weight ratio of 1: 1 to 1:12, in particular 1: 3 to 1: 8 and very particularly between 1: 4 to 1: 7.
  • An essential component of the binder-containing transfer layer of the transfer belt according to the invention is a ⁇ tear-off aid ''. Only when such a tear-off aid is used is it ensured that when the transfer layer is applied to a substrate a clean tear-off takes place. Surprisingly, it has been shown that a relatively limited group of compounds has the desirable properties as a tear aid in the context of the invention, namely soluble cellulose derivatives.
  • Particularly preferred cellulose derivatives are the cellulose ethers soluble in organic solvents and / or water, such as methyl, ethyl, hydroxyethyl, ethylhydroxyethyl and carboxymethyl celluloses, cellulose esters such as cellulose acetate acetobutyrate and propionate.
  • a variety of other soluble cellulose derivatives are suitable which have the desired effects. It appears that the basic cellulose structure in the soluble cellulose derivative is important, while the groups introduced, such as the ethyl group, etc., result in the derivative formed being soluble in the solvent chosen in each case.
  • the amount of the tear-off aid incorporated in the transfer layer is 0.5 to 5% by weight, in particular 1.5 to 3.5% by weight.
  • the range of 2 to 2.5% by weight is particularly preferred.
  • the quantitative ratio of demolition aid to binder could also be used as the basis for forming the transfer layer.
  • the ratio of demolition aid to binder could be given as 1: 2 to 1:20, the range from 1: 4 to 1:10 being preferred.
  • these further additives can be incorporated.
  • These can be agents for improving the covering power, such as, in particular, aluminum silicate, tinting agents, such as, for example, carbon black, or the already mentioned lacquering agent, in particular for basic dyes in the form of, for example, gallic acid derivatives, e.g. Printan from Ciba Geigy.
  • the materials of the individual layers of the transfer belt according to the invention described above generally meet the basic requirement that the adhesive tension (defined by the work of adhesion according to Dupre's equation, Lit .: KL Wolf “Physics and Chemistry of Interfaces", Springer Verlag 1957, p 164) between the pressure-sensitive adhesive layer and the transfer layer is larger than that between the auxiliary carrier and the transfer layer. If this is not the case in individual cases, then a suitable non-stick layer would have to be applied to the auxiliary carrier in order to meet this basic requirement. In such cases, a further requirement is regularly met, according to which the transfer layer formed on the substrate is non-adhesive to other materials that come into contact with it, in particular paper.
  • the following adhesive tension ratios for the successful use of the transfer tape according to the invention can be specified, the symbol "S" representing the adhesive tension ratio between the different materials, so S1 paper / adhesive layer, S2 transfer layer / adhesive layer, S3 transfer layer / auxiliary carrier, S4 transfer layer / paper and S5 pressure-sensitive adhesive layer / auxiliary carrier and, if possible, to comply with the following requirements: S1 greater than S3, S2 greater than S3 ⁇ S5 very much smaller than S2 and S5 smaller than S3.
  • the free surface of the transfer layer applied to a substrate, in particular paper should shows no adherence to the outside, ie S dh is then zero or strives towards zero. In other words, this means that the applied transfer layer should be non-stick when touched by hand or paper.
  • the advantageous method for producing the transfer belt according to the invention is characterized in that a suitable plastic solution, which contains the tear-off aid mentioned, according to customary application technologies, e.g. a squeegee is applied to an auxiliary support in the form of a flexible film, the solvent is evaporated at elevated temperature, an aqueous dispersion containing a pressure sensitive adhesive is applied to the formed transfer layer containing binder and then the water using conventional squeegees, for example with a squeegee or a roller coater is evaporated.
  • a suitable plastic solution which contains the tear-off aid mentioned, according to customary application technologies, e.g. a squeegee is applied to an auxiliary support in the form of a flexible film, the solvent is evaporated at elevated temperature, an aqueous dispersion containing a pressure sensitive adhesive is applied to the formed transfer layer containing binder and then the water using conventional squeegees, for example with a squeegee or a roller
  • the user takes the housing in his hand and uses the application foot to press the outer (removable) tape layer running over its end edge against the substrate to which it is to be transferred (e.g. a printed sheet of paper to make corrections ).
  • the user moves the device relative to the substrate and transfers z.
  • the transmission tape according to the invention is particularly distinguished as a correction means in the office, school and household for covering faulty characters, markings and graphic representations and rewriting.
  • Another use of the transfer belt can be the strikingly colored marking of areas, fonts and / or characters.
  • the transfer belt then carries a transfer layer containing a colored pigment.
  • Another use is to highlight text passages, characters or pictorial representations.
  • the transfer layer is preferably transparent and colored with a colorant that fluoresces in daylight.
  • the transmission tape according to the invention can be easily, quickly and evenly z.
  • B. Apply top layers containing in particular colorants to substrates. If the transfer layer of the transfer tape according to the invention is transparent, for example does not contain any covering pigments, then it can be used for the mere covering without color effect and preservation of characters that are otherwise sensitive to the effects of air and the like.
  • the following dispersion is first produced to form the colorant-containing transfer layer: Solvent-soluble polyurethane (Permuthane U 4924) (25% in isopropyl alcohol / toluene, mixing ratio 1: 1) 19.0 parts by weight Isopropanol 10.0 " toluene 35.0 " Printan G 1.0 " Ethyl cellulose N7 (tear aid) 1.0 " Titanium dioxide (Kronos RN34) 29.0 " Aluminum silicate P820 5.0 " (Means to improve opacity) soot (Printex 140V) (tinting agent) 0.01 " 100.01 parts by weight
  • the PSA was applied with a doctor knife in a thickness of 2 g / m2. Then the water portion was evaporated at about 100 ° C by passing hot air over it.
  • the transfer tape obtained was particularly suitable for covering characters written on paper. It led to the quick and even application of an immediately rewritable cover strip. The application was carried out using a commercially available hand roller.
  • Example 1 was modified in such a way that the following recipe was used to form the colorant-containing transfer layer has been: Polyurethane (Desmolac 2100 from Bayer AG) 5.0 parts by weight Methyl ethyl ketone 30.0 " toluene 28.6 " Maxilon brilliant flavin 10 GFF (BASF) 1.0 " Basonyl Red 540 (BASF) 0.4 " Titanium dioxide (Kronos RN 34) 29.0 " Aluminum silicate P 820 (Degussa) 5.0 " Ethyl cellulose N 7 (Hercules) 1.0 "
  • the transfer layer of the transfer tape obtained was opaque, colored and without fluorescence (orange).
  • Example 1 was modified in such a way that the following recipe was used to form the colorant-containing transfer layer: Linear, saturated polyester (Vitel PE 700) (Goodyear) 4.0 parts by weight Methyl ethyl ketone 30.0 " toluene 31.0 " White pigment, zinc sulfide (Sachtolith L) (Sachtleben GmbH) 25.0 " Ethyl cellulose N 7 (Hercules) 1.0 " Blaze Orange T 15 (Dayglo) 9.0 "
  • the transfer layer of the transfer tape obtained was opaque, colored and with fluorescence (orange).
  • Example 1 was modified in such a way that the following recipe was used to form the colorant-containing transfer layer: Styrene-isoprene-styrene copolymer (Cariflex TR 1107) (Shell) 4.7 parts by weight Methyl ethyl ketone 42.0 " toluene 42.0 " Redglo Soluble Toner GF 13 (Redglo) 0.8 " Ethyl cellulose N 22 (Hercules) 1.0 " Aluminum stearate Alugel TH 34 (Bärlocher) 8.0 " Silica (Aerosil 200) (Degussa) 1.0 "
  • the transfer layer of the transfer tape obtained was transparent and colored (orange).
  • Example 1 was modified in such a way that the following recipe was used to form the colorant-containing transfer layer: Polymer dispersion based on vinyl propionate (Propionfan 6D) (BASE) 20.0 parts by weight Titanium dioxide (Kronos RNCX) 30.0 " Aluminum silicate P 820 5.0 " water 28.5 " Walocel MW 50 GB (Wolff & Co.) 1.0 " isopropanol 14.0 " aqueous solution of a silicone-free, halogenated organic compound (defoamer SF) (Hoechst AG) 1.0 " Sodium dioctyl sulfosuccinate (Lutensit ABO / wetting agent) (BASF) 0.5 "
  • the transfer layer of the transfer tape obtained was opaque and white.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Die Erfindung betrifft ein mehrschichtiges, flexibles Übertragungsband mit einem Hilfsträger und einer Haftkleberschicht, wobei zwischen dem Hilfsträger und der Haftkleberschicht eine bindemittelhaltige Übertragungsschicht, die zur Haftkleberschicht eine stärkere Haftung als zum Hilfsträger aufweist, vorliegt,
Es sind bisher vielfältige Möglichkeiten bekannt, nach denen pigmentierte flüssige Systeme zum Abdecken fehlerhafter schriftlicher Darstellungen herangezogen werden. So werden im Bürobereich weißpigmentierte Dispersionen, die ein leichtflüchtiges organisches Lösemittel enthalten, zur Korrektur von Schriftzeichen und dergleichen mit einem Pinsel aufgetragen. Das Verdampfen des leicht flüchtigen organischen Lösungsmittels führt zur Umweltbelastung. Es muß verhältnismäßig lange gewartet werden, ehe das Verdampfen abgeschlossen und ein erneutes Überschreiben möglich ist. Das Auftragen der Korrekturdispersionen mit einem Pinsel liefert in der Regel keine gleichmäßige Deckschicht.
The invention relates to a multilayer, flexible transfer tape with an auxiliary carrier and a pressure-sensitive adhesive layer, a binder-containing transfer layer being present between the auxiliary carrier and the pressure-sensitive adhesive layer, which has a stronger adhesion to the pressure-sensitive adhesive layer than to the auxiliary carrier.
So far, various possibilities have been known according to which pigmented liquid systems can be used to cover incorrect written representations. In the office area, white pigmented dispersions containing a volatile organic solvent are applied with a brush to correct characters and the like. Evaporation of the volatile organic solvent leads to environmental pollution. You must wait a relatively long time before the evaporation is complete and a new overwrite is possible. Applying the correction dispersions with a brush usually does not provide an even top coat.

Ein besseres Korrigieren ist nach den Angaben der DE-OS 26 26 891 möglich. Diese Druckschrift beschreibt ein mehrschichtiges, flexibles Übertragungsblatt, das aus einem mit einer adhäsiven Trennschicht beschichteten Hilfsträger, einer mit Polyvinylalkohol gebundenen Übertragungsschicht und einer dünnen Haftschicht aufgebaut ist. Die Übertragungsschicht enthält des weiteren Titanweiß als Pigment. Sie dient nach Entfernen des Hilfsträgers als Korrekturschicht für fehlerhafte Schriftzeichen. Der Einsatz in einem Handabroller, wie er nachfolgend im Zusammenhang mit der Erfindung beschrieben wird, ist nicht vorgesehen und würde, wie Überprüfungen zeigen, nicht zu dem gewünschten scharfen Abriß der Korrekturschicht führen.A better correction is possible according to the information in DE-OS 26 26 891. This publication describes a multilayer, flexible transfer sheet which is composed of an auxiliary carrier coated with an adhesive separating layer, a transfer layer bonded with polyvinyl alcohol and a thin adhesive layer. The transfer layer also contains titanium white as a pigment. After removing the subcarrier, it serves as a correction layer for incorrect characters. Use in a manual dispenser, as described below in connection with the invention, is not intended and, as tests show, would not lead to the desired sharp tearing of the correction layer.

Die GB-A-1 036 743 beschreibt ein mehrschichtiges Übertragungsblatt, das zwischen einer Grundschicht mit einem Kunststoffbindemittel und einer Deckschicht mit einem Bindemittel aus Kunststoff und/oder Wachsen eine farbabgebende Schicht aufweist. Der farbabgebenden Schicht kann Ethylzellulose einverleibt sein. Ein derartiges Übertragungsblatt soll in Schreibprogrammen einsetzbar sein.GB-A-1 036 743 describes a multilayer transfer sheet which has a color-releasing layer between a base layer with a plastic binder and a cover layer with a binder made of plastic and / or waxes. Ethyl cellulose can be incorporated into the color-releasing layer. Such a transfer sheet should be usable in writing programs.

Der Erfindung lag die Aufgabe zugrunde, das eingangs bezeichnete Übertragungsband so weiterzubilden, daß die bindemittelhaltige Übertragungsschicht sauber und randscharf auf die zu bedeckende Stelle oder Fläche (auch großflächig) aufgebracht werden kann und der Einsatz in aufgerollter Form in einem Handgerät zum einfachen, schnellen und gleichmäßigen Auftrag auf das jeweilige Substrat möglich wird, wobei ein Fadenziehen der Haftkleberschicht beim Abriß ausgeschlossen sein soll.The invention was based on the object of further developing the transfer belt mentioned at the outset so that the binder-containing transfer layer can be applied cleanly and with sharp edges to the area or area to be covered (also over a large area) and can be used in a rolled-up form in a hand-held device for simple, fast and uniform use Application to the respective substrate is possible, with stringing of the pressure-sensitive adhesive layer should be excluded when tearing.

Die obige Aufgabe wird erfindungsgemäß dadurch gelöst, daß die bindemittelhaltige Übertragungsschicht 0,5 bis 5 Gew.-% eines löslichen Zellulosederivats als Abrißhilfsmittel enthält.The above object is achieved in that the binder-containing transfer layer contains 0.5 to 5% by weight of a soluble cellulose derivative as a tear-off aid.

Der Hilfsträger des erfindungsgemäßen flexiblen Übertragungsbandes besteht vorzugsweise aus einer Kunststoffolie, wie sie bei den Trägern von Schreibmaschinenbändern herangezogen wird, so z.B. aus Polyethylenterephthalat, Polypropylen, Polyethylen, Polyvinylchlorid, Polycarbonat. Als geeignet hat sich als Hilfsträger auch silikonbeschichtetes Papier erwiesen. Dabei führt die Silikonbeschichtung zu einer Verringerung der Haftspannung zwischen der bindemittelhaltigen Übertragungsschicht und dem Hilfsträger. Die Silikonbeschichtung kann auch durch andere Antihaftmittel ersetzt werden, wie beispielsweise durch Polytetrafluorethylen.The auxiliary carrier of the flexible transfer belt according to the invention preferably consists of a plastic film, as is used for the carriers of typewriter ribbons, e.g. made of polyethylene terephthalate, polypropylene, polyethylene, polyvinyl chloride, polycarbonate. Silicone-coated paper has also proven to be suitable as an auxiliary carrier. The silicone coating leads to a reduction in the adhesive tension between the binder-containing transfer layer and the auxiliary carrier. The silicone coating can also be replaced by other non-stick agents, such as polytetrafluoroethylene.

Der Hilfsträger hat vorzugsweise eine Stärke von 10 bis 60 µm, insbesondere von 15 bis 55 µm, die Deckschicht eine Stärke von 5 bis 40 µm, insbesondere 15 bis 25 µ m, und die Haftkleberschicht eine Stärke von 1 bis 8 µm, insbesondere 2 bis 5 µ m. Zur Optimierung des erfindungsgemäßen Übertragungsbandes wählt man zweckmäßigerweise ein Dickenverhältnis der Haftkleberschicht zu der Übertragungsschicht von 1:4 bis 1:12, insbesondere 1:8 bis 1:10.The auxiliary carrier preferably has a thickness of 10 to 60 μm, in particular 15 to 55 μm, the cover layer a thickness of 5 to 40 μm, in particular 15 to 25 μm, and the pressure-sensitive adhesive layer a thickness of 1 to 8 μm, in particular 2 to 5 µ m. To optimize the transfer tape according to the invention, a thickness ratio of the pressure-sensitive adhesive layer to the transfer layer of 1: 4 to 1:12, in particular 1: 8 to 1:10, is expediently chosen.

Die Haftkleberschicht kann aus handelsüblichen Haftklebstoffen bestehen. Es handelt sich dabei um Materialien, die elastische und dauernd klebfähige Selbstklebemassen mit großen Adhäsionskräften darstellen und die bereits unter geringem Druck bei Raumtemperatur auf den verschiedenen Oberflächen sofort haften. Sie werden vorzugsweise in wässriger Lösung auf die sich bereits auf dem Hilfsträger befindende Übertragungsschicht aufgetragen, da so die bereits ausgebildete bindemittelhaltige Übertragungsschicht nicht wieder aufgelöst wird. Unter Haftklebern dieser Art sind insbesondere solche auf Acrylat-Basis vorteilhaft. Bei den Ausgangsmaterialien kann es sich um viskose Lösungen oder Dispersionen handeln, die auf Kautschuk, Polyacrylaten, Polyvinylethern bzw. Polyvinylisobutylen beruhen. Bevorzugt werden Materialien auf der Basis von Polyacrylaten. Geeignete Handelsprodukte sind Ucecryl 913R und Ucecryl PC 80 (vertrieben von der Firma ucb, Ammelicht, Belgien) sowie die Kunststoffdispersion VP 859/6 (vertrieben von der Firma Freihoff). Vorzugsweise enthält das aufzubringende Haftklebermaterial, das regelmäßig in einem wäßrigen Medium vorliegt, Netzmittel bzw. Tenside (vertrieben unter der Handelsbezeichnung Byk W). Die genannten Lösungen oder Dispersionen des Haftklebers zur Ausbildung der Haftkleberschicht werden vorzugsweise in einer Menge von 1 bis 5 g/m², ganz besonders bevorzugt in einer Menge von 2 bis 4 g/m² auf die Übertragungsschicht aufgetragen.The pressure sensitive adhesive layer can consist of commercially available pressure sensitive adhesives. These are materials that are elastic and permanently adhesive self-adhesive compositions with high adhesive forces and that adhere immediately to the various surfaces even under low pressure at room temperature. They are preferably in aqueous solution applied to the transfer layer already on the auxiliary carrier, since the already formed binder-containing transfer layer is not dissolved again. Among pressure-sensitive adhesives of this type, those based on acrylate are particularly advantageous. The starting materials can be viscous solutions or dispersions based on rubber, polyacrylates, polyvinyl ethers or polyvinyl isobutylene. Materials based on polyacrylates are preferred. Suitable commercial products are Ucecryl 913R and Ucecryl PC 80 (sold by ucb, Ammelicht, Belgium) and the plastic dispersion VP 859/6 (sold by Freihoff). The pressure-sensitive adhesive material to be applied, which is regularly present in an aqueous medium, preferably contains wetting agents or surfactants (sold under the trade name Byk W). The above-mentioned solutions or dispersions of the pressure sensitive adhesive for forming the pressure sensitive adhesive layer are preferably applied to the transfer layer in an amount of 1 to 5 g / m², very particularly preferably in an amount of 2 to 4 g / m².

Zur Ausbildung der bindemittelhaltigen Übertragungsschicht werden vorzugsweise thermoplastische oder thermoelastische Polymere in Lösung oder in Form einer Dispersion eingesetzt. Im Rahmen der Erfindung werden zur Lösung der gestellten Aufgabe mit Vorteil folgende Substanzen verwendet:

  • a) Polyurethane eines Molekulargewichtes von 15.000 bis 50.000, z.B. Permuthane U 4924 der Fa. Stahl-Chemie oder Desmolac 2100 der Firma Bayer AG),
  • b) lineare, gesättigte Polyester eines Molekulargewichtes von 20000 bis 30000, z.B. Vitel PE 307 der Goodyear Tire + Rubber,
  • c) Styrol-lsopren-Styrol-Copolymerisate, z.B. Cariflex TR 1107 der Fa. Shell-Chemie,
  • d) Acrylate und Methacrylate, z.B. Pexigum 7 H der Roehm GmbH,
  • e) Polyamide, diphenylsäure-modifiziert, z.B. Scope 30 der Fa. Rhone-Poulenc oder Emerez 1533 der Fa. Emery Chemicals,
  • f) Polymerdispersionen auf der Basis von Vinylpropionat, z.B. Propiofan 6D der Fa. BASF und
  • g) carboxymethylgruppenhaltiges, in Wasser lösliches Polymethacrylat, z.B. Rohagit SD15 der Fa. Roehm GmbH.
Thermoplastic or thermoelastic polymers in solution or in the form of a dispersion are preferably used to form the binder-containing transfer layer. In the context of the invention, the following substances are advantageously used to achieve the object:
  • a) polyurethanes with a molecular weight of 15,000 to 50,000, for example Permuthane U 4924 from Stahl-Chemie or Desmolac 2100 from Bayer AG),
  • b) linear, saturated polyesters with a molecular weight of 20,000 to 30,000, for example Vitel PE 307 from Goodyear Tire + Rubber,
  • c) styrene-isoprene-styrene copolymers, for example Cariflex TR 1107 from Shell-Chemie,
  • d) acrylates and methacrylates, for example Pexigum 7 H from Roehm GmbH,
  • e) polyamides modified with diphenyl acid, for example Scope 30 from Rhone-Poulenc or Emerez 1533 from Emery Chemicals,
  • f) polymer dispersions based on vinyl propionate, for example Propiofan 6D from BASF and
  • g) carboxymethyl group-containing, water-soluble polymethacrylate, for example Rohagit SD15 from Roehm GmbH.

Diese Aufzählung erhebt keinen Anspruch auf Vollständigkeit und bedeutet keine Einschränkung in der Auswahl. Vielmehr ist es für den Fachmann ohne weiteres ersichtlich, daß auch noch andere Bindemittel in Frage kommen können, zumal in der Art des Bindemittels nicht das Wesen der Erfindung zu sehen ist.This list does not claim to be complete and does not imply any restriction in the selection. Rather, it is readily apparent to the person skilled in the art that other binders can also be considered, especially since the nature of the binder is not the essence of the invention.

Um eine optimale Ausführungsform der Erfindung zu ermöglichen, sollte bei der Wahl des jeweiligen Bindemittels zur Ausbildung der Übertragungsschicht auch die Art des dabei herangezogenen Weichmachers bedacht werden. Es sollte ein solcher Weichmacher herangezogen werden, der beim Aufbringen der Übertragungsschicht auf die zu korregierende bzw. zu bedeckende Fläche nicht durch die normalerweise dünn ausgebildete Haftkleberschicht dringt und mit der zu korrigierenden Stelle bzw. den sich dort befindenden Farbmitteln in Kontakt tritt und diese in störender Weise unter Einfärbung der Übertragungsschicht löst. Es hat sich gezeigt, daß hierzu gängige Weichmacher, wie Silikon-, Rizinus-, und Mineralöl geeignet sind. In anderen Anwendungsbereichen bevorzugt eingesetzte Weichmacher, wie beispielsweise Phthalsäureester und Oleinalkohol, sind jedoch nicht gleichermaßen gut geeignet. Um dem angesprochenen nachteiligen Effekt von Weichmachern auch in Grenzfällen entgegenzuwirken, kann der bindemittelhaltigen Übertragungsschicht ein sogenanntes ''Verlackungsmittel'' einverleibt werden, das eventuell migrierende Farbmittel ausfällt bzw. unlöslich macht, so daß diese nicht in die aufgebrachte Übertragungsschicht migrieren und diese wieder einfärben. Zu den geeigneten Verlackungsmitteln zählen Tannin und Tanninderivate. Im allgemeinen lassen sich Verlackungsmittel einsetzen, wie sie aus dem technischen Bereich der Tinten und Tuschen bekannt sind. Sie sollten vorzugsweise in einer Menge von 0,5 bis 5 Gew.-%, insbesondere 1,5 bis 3,5 Gew.-% in der bindemittelhaltigen Übertragungsschicht vorliegen. Der Wert von 2 bis 2,5 Gew.-% ist ganz besonders bevorzugt.In order to enable an optimal embodiment of the invention, the type of plasticizer used should also be considered when choosing the respective binder for forming the transfer layer. Such a plasticizer should be used which, when the transfer layer is applied to the surface to be corrected or to be covered, does not penetrate through the normally thin pressure-sensitive adhesive layer and comes into contact with the area to be corrected or the colorants located there, and this is more troublesome Way, coloring the transfer layer. It has been shown that common plasticizers such as silicone, castor and mineral oil are suitable for this. However, plasticizers preferred in other areas of application, such as phthalic acid esters and oleic alcohol, are not equally suitable. In order to counteract the above-mentioned disadvantageous effect of plasticizers even in borderline cases, a so-called `` varnish agent '' can be incorporated into the binder-containing transfer layer, which may migrate or make insoluble colorants so that they do not migrate into the applied transfer layer and color it again. Suitable varnishing agents include tannin and tannin derivatives. In general, lacquering agents, as are known from the technical field of inks and inks, can be used. They should preferably be present in the binder-containing transfer layer in an amount of 0.5 to 5% by weight, in particular 1.5 to 3.5% by weight. The value of 2 to 2.5% by weight is very particularly preferred.

Bei der Herstellung des erfindungsgemäßen Übertragungsbandes wird das jeweils gewählte Bindemittel zur Ausbildung der Übertragungsschicht vorzugsweise in eine Lösung überführt oder bei Vorliegen einer Polymerdispersion als Dispersion eingesetzt. Die Wahl des Lösemittels hängt von der Art des herangezogenen Bindemittels ab. Verwendet werden vorzugsweise niedrig- bis mittelsiedende organische Lösemittel aus der Gruppe der Alkohole, wie Ethanol, Isopropanol und Butanol, der Ketone, wie Aceton und Methylethylketon, der Ester, wie Methyl- und Ethylacetat, der aromatischen Kohlenwasserstoffe wie Toluol, der aliphatischen Kohlenwasserstoffe, wie Benzine des Siedebereiches von 70 bis 140°C, allein oder im Gemisch sowie Wasser, allein oder im Gemisch mit niedrig-siedenden, wasserlöslichen organischen Lösemitteln. Die Konzentration des Bindemittels in der Lösung bzw. Dispersion ist nicht erfindungswesentlich. Als grobe Richtlinie kann gelten, daß sie zwischen 3 und 15 Gew.-% liegen kann, wobei der Bereich von 4 bis 10 Gew.-% bevorzugt ist. Diese Lösung bzw. Dispersion wird zur Ausbildung der Übertragungsschicht vorzugsweise in einer Menge von 15 bis 25 g/m² und ganz besonders bevorzugt zwischen 18 und 22 g/m² auf den Hilfsträger aufgetragen.In the production of the transfer belt according to the invention, the binder chosen in each case for forming the transfer layer is preferably transferred into a solution or used as a dispersion in the presence of a polymer dispersion. The choice of solvent depends depends on the type of binder used. Low to medium-boiling organic solvents from the group of alcohols, such as ethanol, isopropanol and butanol, the ketones, such as acetone and methyl ethyl ketone, the esters, such as methyl and ethyl acetate, the aromatic hydrocarbons such as toluene and the aliphatic hydrocarbons, such as, are preferably used Petrol in the boiling range of 70 to 140 ° C, alone or in a mixture, as well as water, alone or in a mixture with low-boiling, water-soluble organic solvents. The concentration of the binder in the solution or dispersion is not essential to the invention. As a rough guideline, it can be between 3 and 15% by weight, the range from 4 to 10% by weight being preferred. To form the transfer layer, this solution or dispersion is preferably applied to the auxiliary carrier in an amount of 15 to 25 g / m² and very particularly preferably between 18 and 22 g / m².

Im Rahmen der Erfindung soll der Begriff ''Farbmittel'' weitestgehend verstanden werden. Es soll sich um die Sammelbezeichnung für alle farbgebenden Stoffe handeln, so daß darunter Farbstoffe und Pigmente, letztere auch mit Füllstoffcharakter, fallen. Dabei sollen unter Farbstoffen diejenigen Farbmittel verstanden werden, die in Wasser, organischen Lösungsmitteln oder Bindemitteln löslich sind und denen die unlöslichen Pigmente gegenüberstehen. Die Farbgebung kann unmittelbar vorhanden sein, aber auch erst durch Fluoreszenz in Erscheinung treten. Letzteres gilt beispielsweise für fluoreszierende Tagesleuchtfarben. Wenn das erfindungsgemäße Übertragungsband zur Korrektur von Schriftzeichen und bildlichen Darstellungen und dergleichen herangezogen wird, enthält die bindemittelhaltige Übertragungsschicht insbesondere Weißpigmente, wie Titanweiß, gefällte Kreide, Tonerde oder kolloidale Kieselsäuren. Soll die Übertragungsschicht farbig sein, werden als Farbmittel anorganische Pigmente, wie Chromgelb, Ocker, Eisenoxid-Rot, Kobaltblau, Ultramarin, Berliner Blau, oder organische Pigmente, wie Alkaliblau, Phthalocyanine, Azo-Farbstoffe, Anthrachinoide, Metallkomplex-Pigmente sowie Ruße und Eisenoxidschwarz, verwendet. Von den fluoreszierenden Farbstoffen seien beispielhaft genannt: Blaze Orange T 15 der Fa. Dayglo, Maxilonbrillantflavin 10 GFF der Fa. Ciba Geigy, Pyranin der Fa. Bayer AG und Basonyl-Rot 540 der Fa. BASF.In the context of the invention, the term “colorant” is to be understood as far as possible. It is supposed to be the collective name for all coloring substances, so that this includes dyes and pigments, the latter also having a filler character. Dyes are to be understood as meaning those colorants which are soluble in water, organic solvents or binders and which are opposed by the insoluble pigments. The coloring can be present immediately, but can only appear through fluorescence. The latter applies, for example, to fluorescent fluorescent colors. If the transfer belt according to the invention is used for the correction of characters and pictorial representations and the like, the binder-containing transfer layer contains in particular white pigments, such as titanium white, precipitated chalk, clay or colloidal silicas. If the transfer layer is to be colored, inorganic pigments such as chrome yellow, ocher, iron oxide red, cobalt blue, ultramarine, Berlin blue, or organic pigments such as alkali blue, phthalocyanines, azo dyes, anthraquinones, metal complex pigments as well as carbon blacks and iron oxide black are used as colorants , used. Examples of the fluorescent dyes are: Blaze Orange T 15 from Dayglo, Maxilonbrillantflavin 10 GFF from Ciba Geigy, pyranine from Bayer AG and Basonyl-Red 540 from BASF.

Die Steuerung der optimalen Abdeckfunktion des erfindungsgemäßen Übertragungsbandes, insbesondere derjenigen der bindemittelhaltigen Übertragungsschicht, kann durch den Pigmentgehalt erfolgen. Der optimale Pigmentgehalt hängt von verschiedenen Faktoren ab, so von der Art des gewählten Bindemittels, des Pigmentes selbst und der weiteren einverleibten Additive. Ein besonders kritischer Wert bzw. kritischer Bereich kann nicht angegeben werden. Als grobe Richtlinie könnte durch die Beziehung Bindemittel/Pigment ein Gewichtsverhältnis von 1:1 bis 1:12, insbesondere von 1:3 bis 1:8 und ganz besonders zwischen 1:4 bis 1:7 angegeben werden.The optimum covering function of the transfer belt according to the invention, in particular that of the transfer layer containing the binder, can be controlled by the pigment content. The optimal pigment content depends on various factors, such as the type of binder chosen, the pigment itself and the other additives incorporated. A particularly critical value or critical range cannot be specified. As a rough guideline, the binder / pigment relationship could give a weight ratio of 1: 1 to 1:12, in particular 1: 3 to 1: 8 and very particularly between 1: 4 to 1: 7.

Wesentlicher Bestandteil der bindemittelhaltigen Übertragungsschicht des erfindungsgemäßen Übertragungsbandes ist ein ''Abrißhilfsmittel''. Nur unter Einsatz eines solchen Abrißhilfsmittels ist gewährleistet, daß beim Aufbringen der Übertragungsschicht auf ein Substrat unter Zugspannungsbedingungen ein sauberer Abriß erfolgt. Überraschenderweise hat es sich gezeigt, daß eine relativ begrenzte Verbindungsgruppe die wünschenswerten Eigenschaften als Abrißhilfsmittel im Rahmen der Erfindung aufweist, nämlich lösliche Zellulosederivate. Besonders bevorzugte Zellulosederivate sind die in organischen Lösemitteln und/oder Wasser löslichen Zelluloseether, wie Methyl-, Ethyl, Hydroxyethyl-, Ethylhydroxyethyl- und Carboxymethylzellulosen, Zelluloseester, wie Zelluloseacetatacetobutyrat und -propionat. Es sind jedoch vielfältige andere lösliche Zellulosederivate geeignet, die die gewünschten Effekte bewirken. Scheinbar ist das Zellulosegrundgerüst in dem löslichen Zellulosederivat wichtig, während die eingeführten Gruppen, wie die Ethylgruppe etc., dazu führen, daß das gebildete Derivat in dem jeweils gewählten Lösungsmittel löslich ist.An essential component of the binder-containing transfer layer of the transfer belt according to the invention is a `` tear-off aid ''. Only when such a tear-off aid is used is it ensured that when the transfer layer is applied to a substrate a clean tear-off takes place. Surprisingly, it has been shown that a relatively limited group of compounds has the desirable properties as a tear aid in the context of the invention, namely soluble cellulose derivatives. Particularly preferred cellulose derivatives are the cellulose ethers soluble in organic solvents and / or water, such as methyl, ethyl, hydroxyethyl, ethylhydroxyethyl and carboxymethyl celluloses, cellulose esters such as cellulose acetate acetobutyrate and propionate. However, a variety of other soluble cellulose derivatives are suitable which have the desired effects. It appears that the basic cellulose structure in the soluble cellulose derivative is important, while the groups introduced, such as the ethyl group, etc., result in the derivative formed being soluble in the solvent chosen in each case.

Die Menge des der Übertragungsschicht einverleibten Abrißhilfsmittels beträgt 0,5 bis 5 Gew.-%, insbesondere 1,5 bis 3,5 Gew.-%. Der Bereich von 2 bis 2,5 Gew.- % ist besonders bevorzugt.The amount of the tear-off aid incorporated in the transfer layer is 0.5 to 5% by weight, in particular 1.5 to 3.5% by weight. The range of 2 to 2.5% by weight is particularly preferred.

Diese Angaben beziehen sich auf die Trockensubstanz. Zur Ausbildung der Übertragungsschicht könnte auch das Mengenverhältnis von Abrißhilfsmittel zu Bindemittel zugrundegelegt werden. Als grobe Richtlinie könnte hier das Verhältnis von Abrißhilfsmittel zu Bindemittel mit 1:2 bis 1:20 angegeben werden, wobei der Bereich von 1:4 bis 1:10 bevorzugt wird.This information relates to the dry matter. The quantitative ratio of demolition aid to binder could also be used as the basis for forming the transfer layer. As a rough guideline, the ratio of demolition aid to binder could be given as 1: 2 to 1:20, the range from 1: 4 to 1:10 being preferred.

Zur Steuerung des Auftragsvorgang, aber auch der Eigenschaften der auf ein Substrat aufgebrachten Übertragungsschicht können dieser weitere Additive einverleibt werden. Hierbei kann es sich um Mittel zur Verbesserung der Deckkraft, wie insbesondere Aluminiumsilikat, Abtönmittel, wie beispielsweise Ruß, oder um das bereits erwähnte Verlackungsmittel, insbesondere für basische Farbstoffe in Form von beispielsweise Gallussäurederivate, z.B. Printan der Firma Ciba Geigy, handeln.To control the application process, but also the properties of the transfer layer applied to a substrate, these further additives can be incorporated. These can be agents for improving the covering power, such as, in particular, aluminum silicate, tinting agents, such as, for example, carbon black, or the already mentioned lacquering agent, in particular for basic dyes in the form of, for example, gallic acid derivatives, e.g. Printan from Ciba Geigy.

Die oben beschriebenen Materialien der einzelnen Schichten des erfindungsgemäßen Übertragungsbandes genügen in der Regel der Grundforderung, daß die Haftspannung (definiert über die Adhäsionsarbeit entsprechend der Dupre'schen Gleichung, Lit.: K.L. Wolf "Physik und Chemie der Grenzflächen", Springer Verlag 1957, S. 164) zwischen der Haftkleberschicht und der Übertragungsschicht größer als die zwischen dem Hilfsträger und der Übertragungsschicht ist. Sollte das im Einzelfall nicht zutreffen, dann müßte eine geeignete Antihaftschicht auf den Hilfsträger aufgebracht werden, um diese Grundforderung zu erfüllen. In solchen Fällen wird regelmäßig eine weitere Forderung eingehalten, wonach die auf dem Substrat ausgebildete Übertragungsschicht gegenüber anderen damit in Kontakt gelangenden Materialien, insbesondere Papier, nicht-haftend ist. Somit lassen sich im Ergebnis folgende Haftspannungsverhältnisse zur erfolgreichen Verwendung des erfindungsgemäßen Übertragungsbandes angeben, wobei das Symbol "S" das Haftspannungsverhältnis zwischen den unterschiedlichen Materialien wiedergibt, so S₁ Papier/Haftklebeschicht, S₂ Übertragungsschicht/Haftklebeschicht, S₃ Übertragungsschicht/Hilfsträger, S₄ Übertragungsschicht/Papier und S₅ Haftklebeschicht/Hilfsträger und möglichst folgende Forderungen einzuhalten: S₁ größer als S₃, S₂ größer als S₃` S₅ sehr viel kleiner als S₂ und S₅ kleiner als S₃. Ferner sollte die freie Oberfläche der auf ein Substrat, insbesondere auf Papier, aufgetragenen Übertragungsschicht nach außen möglichst keinerlei Haftvermögen zeigt, d.h. S₄ ist dann Null bzw. strebt gegen Null. Mit anderen Worten bedeutet das, daß die aufgetragene Übertragungsschicht bei Berühren mit Hand oder mit Papier nicht-haftend sein soll.The materials of the individual layers of the transfer belt according to the invention described above generally meet the basic requirement that the adhesive tension (defined by the work of adhesion according to Dupre's equation, Lit .: KL Wolf "Physics and Chemistry of Interfaces", Springer Verlag 1957, p 164) between the pressure-sensitive adhesive layer and the transfer layer is larger than that between the auxiliary carrier and the transfer layer. If this is not the case in individual cases, then a suitable non-stick layer would have to be applied to the auxiliary carrier in order to meet this basic requirement. In such cases, a further requirement is regularly met, according to which the transfer layer formed on the substrate is non-adhesive to other materials that come into contact with it, in particular paper. Thus, as a result, the following adhesive tension ratios for the successful use of the transfer tape according to the invention can be specified, the symbol "S" representing the adhesive tension ratio between the different materials, so S₁ paper / adhesive layer, S₂ transfer layer / adhesive layer, S₃ transfer layer / auxiliary carrier, S₄ transfer layer / paper and S₅ pressure-sensitive adhesive layer / auxiliary carrier and, if possible, to comply with the following requirements: S₁ greater than S₃, S₂ greater than S₃` S₅ very much smaller than S₂ and S₅ smaller than S₃. Furthermore, the free surface of the transfer layer applied to a substrate, in particular paper, should shows no adherence to the outside, ie S dh is then zero or strives towards zero. In other words, this means that the applied transfer layer should be non-stick when touched by hand or paper.

Das vorteilhafte Verfahren zur Herstellung des erfindungsgemäßen Übertragungsbandes ist dadurch gekennzeichnet, daß eine geeignete Kunststofflösung, die das erwähnte Abrißhilfsmittel enthält, nach üblichen Auftragstechnologien, z.B. einer Rakel, auf einen Hilfsträger in Form einer flexiblen Folie aufgetragen wird, das Lösemittel bei erhöhter Temperatur abgedampft, darauf eine einen Haftklebstoff enthaltende wäßrige Dispersion nach üblichen Auftragstechnologien, so mit einer Rakel oder einem Rollcoater, auf die ausgebildete bindemittelhaltige Übertragungsschicht aufgebracht und anschließend das Wasser abgedampft wird.The advantageous method for producing the transfer belt according to the invention is characterized in that a suitable plastic solution, which contains the tear-off aid mentioned, according to customary application technologies, e.g. a squeegee is applied to an auxiliary support in the form of a flexible film, the solvent is evaporated at elevated temperature, an aqueous dispersion containing a pressure sensitive adhesive is applied to the formed transfer layer containing binder and then the water using conventional squeegees, for example with a squeegee or a roller coater is evaporated.

Bei der Verwendung des erfindungsgemäßen Übertragungsbandes bedient man sich vorteilhafterweise handelsüblicher Auftragsgeräte, die ein Abrollen der mit dem Haftkleber versehenen Übertragungsschicht bei gleichzeitigem Einzug des Hilfsträgers ermöglichen. Dies führt zu einer besonders leichten Handhabung des erfindungsgemäßen Übertragungsbandes. Dies können handelsübliche Handgeräte sein. Als ein hierfür besonders geeignetes Handgerät kann ein sogenannter ''Handroller'' eingesetzt werden, bei dem innerhalb eines griffgünstig gestalteten Gehäuses eine Vorratsspule mit dem Übertragungsband vorgesehen ist, von der aus es über einen aus dem Gehäuse vorstehenden Auftragsfuß geführt und von diesem wieder auf eine Aufwickelspule in das Gehäuse zurückgeleitet wird. Durch ein geeignetes Getriebe zwischen beiden Spulen im Gehäuse wird sichergestellt, daß das Übertragungsband stets ausreichend gespannt geführt ist. Der Benutzer nimmt zum Einsatz des Übertragungsbandes das Gehäuse in seine Hand und drückt mittels des Auftragsfußes die über dessen Endkante laufende äußere (ablösbare) Bandschicht gegen das Substrat, auf das sie übertragen werden soll (z. B. ein bedrucktes Blatt Papier, um Korrekturen vorzunehmen). Während des Andrückens bewegt der Benutzer des Gerät relativ zum Substrat und überträgt dabei z. B. eine deckende Schicht oder eine fluoreszierende Schicht, auf das Substrat, wobei der flexible Hilfsträger von der Vorratsspule ab- und auf die Aufwickelspule aufgewickelt wird.When using the transfer tape according to the invention, use is advantageously made of commercially available application devices which enable the transfer layer provided with the pressure-sensitive adhesive to be rolled off while the auxiliary carrier is being drawn in at the same time. This leads to particularly easy handling of the transfer belt according to the invention. These can be standard handheld devices. A so-called `` hand roller '' can be used as a hand-held device that is particularly suitable for this purpose, in which a supply spool with the transfer belt is provided within a housing with easy access, from which it is guided over an application foot protruding from the housing and from there again onto one Winding reel is returned to the housing. A suitable gear between the two coils in the housing ensures that the transfer belt is always sufficiently tensioned. To use the transfer tape, the user takes the housing in his hand and uses the application foot to press the outer (removable) tape layer running over its end edge against the substrate to which it is to be transferred (e.g. a printed sheet of paper to make corrections ). During pressing, the user moves the device relative to the substrate and transfers z. B. a covering layer or a fluorescent layer, on the substrate, the flexible auxiliary carrier being unwound from the supply spool and wound onto the take-up spool.

Das erfindungsgemäße Übertragungsband zeichnet sich in besonderer Weise als Korrekturmittel in Büro, Schule und Haushalt zum Abdecken fehlerhafter Schriftzeichen, von Markierungen und zeichnerischen Darstellungen und Wiederbeschriften aus. Eine andere Verwendung des Übertragungsbandes kann die auffallend farbige Markierung von Flächen, Schriften und/oder Zeichen sein. Dazu trägt dann das Übertragungsband eine ein Buntpigment enthaltende Übertragungsschicht. Eine weitere Verwendung besteht in dem Hervorheben von Textstellen, Zeichen oder bildlichen Darstellungen. Dazu ist die Übertragungsschicht vorzugsweise transparent und mit einem in Tageslicht fluoreszierenden Farbmittel eingefärbt. In allen hier genannten Anwendungsbeispielen erweist es sich als besonders vorteilhaft, daß die Anwendung ''trocken'' erfolgt, d. h. kein Verwischen flüssiger Aufstriche und kein Verdunsten bedenklicher Lösemittel erfolgt und eine sofortige Wiederbeschriftung möglich ist. Mit dem erfindungsgemäßen Übertragungsband lassen sich also leicht, schnell und gleichmäßig z. B. Deckschichten, die insbesondere Farbmittel enthalten, auf Substrate auftragen. Wenn die Übertragungsschicht des erfindungsgemäßen Übertragungsbandes transparent ist, also beispielsweise keine deckenden Pigmente enthält, dann kann sie zur bloßen Abdeckung ohne Farbwirkung und Konservierung von sonst gegenüber Lufteinwirkungen und dergleichen empfindlichen Schriftzeichen herangezogen werden.The transmission tape according to the invention is particularly distinguished as a correction means in the office, school and household for covering faulty characters, markings and graphic representations and rewriting. Another use of the transfer belt can be the strikingly colored marking of areas, fonts and / or characters. For this purpose, the transfer belt then carries a transfer layer containing a colored pigment. Another use is to highlight text passages, characters or pictorial representations. For this purpose, the transfer layer is preferably transparent and colored with a colorant that fluoresces in daylight. In all of the application examples mentioned here, it proves to be particularly advantageous for the application to be “dry”, i. H. no smearing of liquid spreads and no evaporation of questionable solvents and an immediate rewriting is possible. With the transmission tape according to the invention can be easily, quickly and evenly z. B. Apply top layers containing in particular colorants to substrates. If the transfer layer of the transfer tape according to the invention is transparent, for example does not contain any covering pigments, then it can be used for the mere covering without color effect and preservation of characters that are otherwise sensitive to the effects of air and the like.

Die Erfindung wird nachfolgend anhand von Beispielen noch näher erläutert.The invention is explained in more detail below with the aid of examples.

Beispiel 1example 1

Es wird zunächst folgende Dispersion zur Ausbildung der farbmittelhaltigen Übertragungsschicht hergestellt: Lösungsmittellösliches Polyurethan (Permuthane U 4924) (25%ig in Isopropylalkohol/Toluol, Mischungsverhältnis 1:1) 19,0 Gew.-Teile Isopropanol 10,0 " Toluol 35,0 " Verlackungsmittel Printan G 1,0 " Ethylzellulose N7 (Abrißhilfsmittel) 1,0 " Titandioxid (Kronos RN34) 29,0 " Aluminiumsilikat P820 5,0 " (Mittel zur Verbesserung der Deckkraft) Ruß (Printex 140V) (Abtönmittel) 0,01 " 100,01 Gew.-Teile The following dispersion is first produced to form the colorant-containing transfer layer: Solvent-soluble polyurethane (Permuthane U 4924) (25% in isopropyl alcohol / toluene, mixing ratio 1: 1) 19.0 parts by weight Isopropanol 10.0 " toluene 35.0 " Printan G 1.0 " Ethyl cellulose N7 (tear aid) 1.0 " Titanium dioxide (Kronos RN34) 29.0 " Aluminum silicate P820 5.0 " (Means to improve opacity) soot (Printex 140V) (tinting agent) 0.01 " 100.01 parts by weight

Die vorstehende Abdeckmasse wurde mit einer Rakel in einer Menge von 18 g/m² auf einen silikonisierten Papierträger aufgetragen. Dann wurde das Lösemittel bei etwa 100°C durch Überleiten von Heißluft abgedampft. Anschließend wurde, gleichfalls mit einer Rakel, eine wäßrige Dispersion, die aus folgenden Bestandteilen bestand, auf die Oberfläche der farbmittelhaltigen Abdeckschicht aufgetragen: Haftkleber auf Acrylatbasis (Kunststoff-Dispersion VP 859/6 der Firma Freihoff) (Copolymer auf Basis von Acrylsäureester) 66,9 Gew.-Teile Wasser 33,0 " Netzmittel bzw. Tensid (Byk W) 0,1 " 100,0 Gew.-Teile The above masking compound was applied with a doctor knife in an amount of 18 g / m² to a siliconized paper backing. Then the solvent was evaporated at about 100 ° C by passing hot air over it. Then, likewise with a doctor blade, an aqueous dispersion consisting of the following constituents was applied to the surface of the colorant-containing cover layer: Acrylic-based pressure sensitive adhesive (plastic dispersion VP 859/6 from Freihoff) (copolymer based on acrylic acid ester) 66.9 parts by weight water 33.0 " Wetting agent or surfactant (Byk W) 0.1 " 100.0 parts by weight

Die Haftklebemasse wurde mit einer Rakel in einer Stärke von 2 g/m² aufgetragen. Dann wurde der Wasseranteil bei etwa 100°C durch Überleiten von Heißluft abgedampft.The PSA was applied with a doctor knife in a thickness of 2 g / m². Then the water portion was evaporated at about 100 ° C by passing hot air over it.

Das erhaltene Übertragungsband war besonders zum Abdecken von auf Papier geschriebenen Schriftzeichen geeignet. Es führte zum schnellen und gleichmäßigen Aufbringen eines unmittelbar wieder beschreibbaren Abdeckstreifens. Das Auftragen erfolgte durch einen im Handel erhältlichen Handroller.The transfer tape obtained was particularly suitable for covering characters written on paper. It led to the quick and even application of an immediately rewritable cover strip. The application was carried out using a commercially available hand roller.

Beispiel 2Example 2

Das Beispiel 1 wurde dahingehend abgewandelt, daß zur Ausbildung der farbmittelhaltigen Übertragungsschicht folgende Rezeptur herangezogen wurde: Polyurethan (Desmolac 2100 der Fa. Bayer AG) 5,0 Gew.-Teile Methylethylketon 30,0 " Toluol 28,6 " Maxilonbrillantflavin 10 GFF (BASF) 1,0 " Basonyl-Rot 540 (BASF) 0,4 " Titandioxid (Kronos RN 34) 29,0 " Aluminiumsilikat P 820 (Degussa) 5,0 " Ethylzellulose N 7 (Hercules) 1,0 " Example 1 was modified in such a way that the following recipe was used to form the colorant-containing transfer layer has been: Polyurethane (Desmolac 2100 from Bayer AG) 5.0 parts by weight Methyl ethyl ketone 30.0 " toluene 28.6 " Maxilon brilliant flavin 10 GFF (BASF) 1.0 " Basonyl Red 540 (BASF) 0.4 " Titanium dioxide (Kronos RN 34) 29.0 " Aluminum silicate P 820 (Degussa) 5.0 " Ethyl cellulose N 7 (Hercules) 1.0 "

Die Übertragungsschicht des erhaltenen Übertragungsbandes war deckend, farbig und ohne Fluoreszenz (orange).The transfer layer of the transfer tape obtained was opaque, colored and without fluorescence (orange).

Beispiel 3Example 3

Das Beispiel 1 wurde dahingehend abgewandelt, daß zur Ausbildung der farbmittelhaltigen Übertragungsschicht folgende Rezeptur herangezogen wurde: Linearer, gesättiger Polyester (Vitel PE 700) (Goodyear) 4,0 Gew.-Teile Methylethylketon 30,0 " Toluol 31,0 " Weißpigment, Zinksulfid (Sachtolith L) (Sachtleben GmbH) 25,0 " Ethylzellulose N 7 (Hercules) 1,0 " Blaze Orange T 15 (Dayglo) 9,0 " Example 1 was modified in such a way that the following recipe was used to form the colorant-containing transfer layer: Linear, saturated polyester (Vitel PE 700) (Goodyear) 4.0 parts by weight Methyl ethyl ketone 30.0 " toluene 31.0 " White pigment, zinc sulfide (Sachtolith L) (Sachtleben GmbH) 25.0 " Ethyl cellulose N 7 (Hercules) 1.0 " Blaze Orange T 15 (Dayglo) 9.0 "

Die Übertragungsschicht des erhaltenen Übertragungsbandes war deckend, farbig und mit Fluoreszenz (orange).The transfer layer of the transfer tape obtained was opaque, colored and with fluorescence (orange).

Beispiel 4Example 4

Das Beispiel 1 wurde dahingehend abgewandelt, daß zur Ausbildung der farbmittelhaltigen Übertragungsschicht folgende Rezeptur herangezogen wurde: Styrol-lsopren-Styrol-Copolymerisat (Cariflex TR 1107) (Shell) 4,7 Gew.-Teile Methylethylketon 42,0 " Toluol 42,0 " Redglo Soluble Toner GF 13 (Redglo) 0,8 " Ethylzellulose N 22 (Hercules) 1,0 " Aluminiumstearat Alugel TH 34 (Bärlocher) 8,0 " Kieselsäure (Aerosil 200) (Degussa) 1,0 " Example 1 was modified in such a way that the following recipe was used to form the colorant-containing transfer layer: Styrene-isoprene-styrene copolymer (Cariflex TR 1107) (Shell) 4.7 parts by weight Methyl ethyl ketone 42.0 " toluene 42.0 " Redglo Soluble Toner GF 13 (Redglo) 0.8 " Ethyl cellulose N 22 (Hercules) 1.0 " Aluminum stearate Alugel TH 34 (Bärlocher) 8.0 " Silica (Aerosil 200) (Degussa) 1.0 "

Die Übertragungsschicht des erhaltenen Übertragungsbandes war transparent und farbig (orange).The transfer layer of the transfer tape obtained was transparent and colored (orange).

Beispiel 5Example 5

Das Beispiel 1 wurde dahingehend abgewandelt, daß zur Ausbildung der farbmittelhaltigen Übertragungsschicht folgende Rezeptur herangezogen wurde: Polymerdispersion auf der Basis Vinylpropionat (Propionfan 6D) (BASE) 20,0 Gew.-Teile Titandioxid (Kronos RNCX) 30,0 " Aluminiumsilikat P 820 5,0 " Wasser 28,5 " Walocel MW 50 GB (Wolff & Co.) 1,0 " lsopropanol 14,0 " wässrige Lösung einer silikonfreien, halogenierten organischen Verbindung (Entschäumer SF) (Hoechst AG) 1,0 " Natrium-dioctylsulfosuccinat (Lutensit ABO / Netzmittel) (BASF) 0,5 " Example 1 was modified in such a way that the following recipe was used to form the colorant-containing transfer layer: Polymer dispersion based on vinyl propionate (Propionfan 6D) (BASE) 20.0 parts by weight Titanium dioxide (Kronos RNCX) 30.0 " Aluminum silicate P 820 5.0 " water 28.5 " Walocel MW 50 GB (Wolff & Co.) 1.0 " isopropanol 14.0 " aqueous solution of a silicone-free, halogenated organic compound (defoamer SF) (Hoechst AG) 1.0 " Sodium dioctyl sulfosuccinate (Lutensit ABO / wetting agent) (BASF) 0.5 "

Die Übertragungsschicht des erhaltenen Übertragungsbandes war deckend und weiß.The transfer layer of the transfer tape obtained was opaque and white.

Claims (15)

  1. A multilayer, flexible transfer ribbon with a carrier layer and a contact adhesive layer, wherein an adhesive-containing transfer layer is arranged between the carrier and contact adhesive layers and adheres more strongly to the said contact adhesive layer than to the carrier layer, characterised in that the adhesive-containing transfer layer contains 0.5 to 5 per cent by weight of a soluble cellulose derivative as an aid to detachment.
  2. A transfer ribbon according to claim 1, characterised in that the cellulose derivative is ethyl cellulose.
  3. A transfer ribbon according to either claim 1 or claim 2, characterised in that the carrier layer comprises a plastic and/or silicon-coated paper.
  4. A transfer ribbon according to at least one of claims 1 to 3, characterised in that the transfer layer contains polyurethane as a binding agent.
  5. A transfer ribbon according to claim 4, characterised in that the polyurethane is an aliphatic single-component polyurethane.
  6. A transfer ribbon according to at least one of claims 1 to 5, characterised in that colouring agent is contained in the transfer layer.
  7. A transfer ribbon according to claim 6, characterised in that the colouring agent is a pigment.
  8. A transfer ribbon according to claim 7, especially for correction purposes, characterised in that the pigment is a white opaque pigment.
  9. A transfer ribbon according to claim 7, especially for marking purposes, characterised in that the pigment is an inorganic or organic coloured pigment.
  10. A transfer ribbon according to claim 6, especially to highlight text symbols and graphical figures, characterised in that a fluorescent dye is used as the colouring agent.
  11. A transfer ribbon according to at least one of claims 1 to 10, characterised in that if a basic dyestuff is worked into the transfer layer then that layer contains a pigmenting agent to this end.
  12. A transfer ribbon according to at least one of claims 1 to 11, characterised in that the thickness ratio of the contact adhesive layer to the transfer layer lies between 1:4 and 1:12.
  13. A transfer ribbon according to claim 12, characterised in that the thickness ratio lies between 1:8 and 1:10.
  14. A method for the production of a multilayer, flexible transfer ribbon according to at least one of claims 1 to 13, characterised in that a plastics solution containing an aid to detachment in the form of a soluble cellulose derivative is applied to a flexible carrier layer using the usual application technology, the solvent is evaporated off at an elevated temperature, an aqueous dispersion containing a contact adhesive is then applied to the transfer layer so derived using the usual application technology and the water subsequently evaporated off.
  15. The use of the transfer ribbon according to at least one of claims 1 to 13, characterized in that it is used in a rolled-up form in a manual apparatus.
EP88119402A 1987-12-03 1988-11-22 Multilayer flexible transfer ribbon Expired - Lifetime EP0318804B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT8888119402T ATE104603T1 (en) 1987-12-03 1988-11-22 MULTI-LAYER FLEXIBLE TRANSMISSION BELT.

Applications Claiming Priority (4)

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DE3741022A DE3741022C3 (en) 1987-12-03 1987-12-03 Multilayer, flexible transfer belt
DE3741022 1987-12-03
DE3835783 1988-10-20
DE3835783A DE3835783C2 (en) 1987-12-03 1988-10-20 Multilayer flexible transfer belt, method of manufacture and uses thereof

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EP0318804A2 EP0318804A2 (en) 1989-06-07
EP0318804A3 EP0318804A3 (en) 1990-11-07
EP0318804B1 true EP0318804B1 (en) 1994-04-20

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EP (1) EP0318804B1 (en)
JP (1) JPH0214185A (en)
KR (1) KR920010112B1 (en)
AR (1) AR247849A1 (en)
AU (1) AU618768B2 (en)
BR (1) BR8806405A (en)
DE (3) DE3741022C3 (en)
DK (1) DK173619B1 (en)
ES (1) ES2051287T3 (en)
FI (1) FI97286C (en)
MX (1) MX169629B (en)
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PT (1) PT89133B (en)

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KR920010112B1 (en) 1992-11-16
DE3741022C2 (en) 1989-11-23
NO885336L (en) 1989-06-05
AU2580888A (en) 1989-06-15
AU618768B2 (en) 1992-01-09
PT89133A (en) 1989-12-29
NO176832B (en) 1995-02-27
FI97286B (en) 1996-08-15
MX169629B (en) 1993-07-15
FI885585A0 (en) 1988-12-01
DE3741022A1 (en) 1989-06-15
JPH0549476B2 (en) 1993-07-26
EP0318804A3 (en) 1990-11-07
NO176832C (en) 1995-06-14
DK667888D0 (en) 1988-11-30
AR247849A1 (en) 1995-04-28
EP0318804A2 (en) 1989-06-07
DE3741022C3 (en) 1994-12-22
KR890009649A (en) 1989-08-03
FI885585A (en) 1989-06-04
JPH0214185A (en) 1990-01-18
FI97286C (en) 1996-11-25
DE3835783A1 (en) 1990-04-26
DE3835783C2 (en) 1998-02-19
ES2051287T3 (en) 1994-06-16
PT89133B (en) 1993-05-31
DE3889201D1 (en) 1994-05-26
DK173619B1 (en) 2001-05-07
NO885336D0 (en) 1988-11-30
BR8806405A (en) 1989-08-22
DK667888A (en) 1989-06-04

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