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
  • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
  • B41M5/03—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
  • B65H37/002—Web delivery apparatus, the web serving as support for articles, material or another web
  • B65H37/005—Hand-held apparatus
  • B65H37/007—Applicators for applying coatings, e.g. correction, colour or adhesive coatings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
  • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
  • B41J29/26—Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling
  • B41J29/36—Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling for cancelling or correcting errors by overprinting
  • B41J29/367—Devices, 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
• • 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
  • B41M5/10—Duplicating or marking methods; Sheet materials for use therein by using carbon paper or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
  • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
  • B41M2205/16—Correction 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.
• the invention was based on the object of developing the transfer belt mentioned at the outset in such a way that the binder-containing transfer layer can be applied cleanly and sharply to the areas to be covered and, moreover, use in a hand-held device for simple, quick and uniform application to the respective substrate is possible.
• the binder-containing transfer layer contains a tear-off aid in the form of a soluble cellulose derivative.
• 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 approximately 10 to 60 ⁇ m, in particular 15 to 55 ⁇ m, the cover layer a thickness of approximately 5 to 40 ⁇ m, in particular approximately 15 to 25 ⁇ m, and the pressure-sensitive adhesive layer a thickness of approximately 1 to 8 ⁇ m, especially about 2 to 5 ⁇ m.
• a thickness ratio of the pressure-sensitive adhesive layer to the transfer layer of about 1: 4 to 1:12, in particular about 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 represent elastic and permanently adhesive self-adhesive compositions with high adhesive forces and that adhere to the various surfaces immediately 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 about 1 to 5 g / m 2, very particularly preferably in an amount of about 2 to 4 g / m 2.
• the type of plasticizer used should also be taken into account 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 with coloring of 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.
• lacquering agent In order to counteract the above-mentioned disadvantageous effect of plasticizers even in borderline cases, a so-called “lacquering 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 about 0.5 to 5% by weight, in particular 1.5 to 3.5% by weight. The value of about 2 to 2.5% by weight is very particularly preferred.
• the binder selected in each case is preferably converted into a solution to form the transfer layer 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 the 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, and 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 to correct 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.
• fluorescent dyes are: Blaze Orange T 15 from Dayglo, Maxilonbrillant flavin 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 approximately 1: 1 to 1:12, in particular 1: 3 to 1: 8 and very particularly between approximately 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 found that a relatively limited connecting group has the desirable properties as a tear-off aid in the context of the invention, namely soluble cellulose derivatives.
• Particularly preferred cellulose derivatives are the cellulose ethers which are soluble in organic solvents and / or water, such as methyl, ethyl, hydroxyethyl, ethylhydroxyethyl and carboxymethyl celluloses, and cellulose esters such as cellulose acetate acetobutyrate and propionate.
• cellulose esters such as cellulose acetate acetobutyrate and propionate.
• a variety of other soluble cellulose derivatives are suitable which have the desired effects.
• the cellulose backbone in the soluble cellulose derivative appears to be 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 demolition aid incorporated into the transfer layer is not critical. It depends in particular on the type of binder, the pigment and the other additives incorporated. An amount of about 0.5 to 5% by weight, in particular about 1.5 to 3.5% by weight, is preferred. The range of about 2 to 2.5% by weight is particularly preferred.
• the quantitative ratio of demolition aid to binder could also be used as a basis for forming the transfer layer.
• the ratio of demolition aid to binder could be given as about 1: 2 to 1:20, the range from about 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 .: K L. 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 less than S3.
• the free surface of the transfer layer applied to a substrate, in particular paper should shows no adherence to the outside as far as possible, ie S4 is then zero or tends towards zero. In other words, the transfer layer applied 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 carrier 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 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
• auxiliary carrier 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 a squeegee or a roller coater is evaporated.
• 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 which 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 varnish 1.0 " Ethyl cellulose N7 (tear aid) 1.0 " Titanium dioxide (Kronos RN34) 29.0 " Aluminum silicate P820 (agent to improve opacity) 5.0 " Carbon black (Printex 140V) (tinting agent) 0.01 " 100.01 parts by weight
• the PSA was applied with a doctor blade 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) (BASF) 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.

Landscapes

• 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)

Priority Applications (1)

Applications Claiming Priority (4)

Publications (3)

Family

ID=25862407

Family Applications (1)

Country Status (13)

Cited By (7)

Families Citing this family (4)

Family Cites Families (20)

• 1987
  • 1987-12-03 DE DE3741022A patent/DE3741022C3/de not_active Expired - Lifetime
• 1988
  • 1988-10-20 DE DE3835783A patent/DE3835783C2/de not_active Expired - Lifetime
  • 1988-11-22 DE DE3889201T patent/DE3889201D1/de not_active Expired - Lifetime
  • 1988-11-22 EP EP88119402A patent/EP0318804B1/fr not_active Expired - Lifetime
  • 1988-11-22 AU AU25808/88A patent/AU618768B2/en not_active Ceased
  • 1988-11-22 ES ES88119402T patent/ES2051287T3/es not_active Expired - Lifetime
  • 1988-11-30 MX MX1400488A patent/MX169629B/es unknown
  • 1988-11-30 NO NO885336A patent/NO176832C/no unknown
  • 1988-11-30 PT PT89133A patent/PT89133B/pt not_active IP Right Cessation
  • 1988-11-30 DK DK198806678A patent/DK173619B1/da not_active IP Right Cessation
  • 1988-12-01 FI FI885585A patent/FI97286C/fi active IP Right Grant
  • 1988-12-01 BR BR888806405A patent/BR8806405A/pt not_active IP Right Cessation
  • 1988-12-01 AR AR88312601A patent/AR247849A1/es active
  • 1988-12-02 JP JP63304284A patent/JPH0214185A/ja active Granted
  • 1988-12-03 KR KR1019880016154A patent/KR920010112B1/ko not_active Expired

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