WO2003037644A2 - Coating and method for producing a product obtained by heat transfer and/or heat sublimation, and use of such a product - Google Patents
Coating and method for producing a product obtained by heat transfer and/or heat sublimation, and use of such a product Download PDFInfo
- Publication number
- WO2003037644A2 WO2003037644A2 PCT/EP2002/010450 EP0210450W WO03037644A2 WO 2003037644 A2 WO2003037644 A2 WO 2003037644A2 EP 0210450 W EP0210450 W EP 0210450W WO 03037644 A2 WO03037644 A2 WO 03037644A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lubricant
- coating according
- waxes
- wax
- back coating
- Prior art date
Links
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
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/423—Intermediate, backcoat, or covering layers characterised by non-macromolecular compounds, e.g. waxes
Definitions
- the invention relates to a coating, in particular a reverse side coating (back casting, back coat) for a thermal transfer and / or a thermal sublimation product.
- a coating in particular a reverse side coating (back casting, back coat) for a thermal transfer and / or a thermal sublimation product.
- the writing layer i.e. the inclayers
- the auxiliary layers e.g. the release layers and especially the back coating are optimally equipped.
- a material to be transferred such as ink (fusing ink, thermal ink)
- ink fused ink, thermal ink
- a substrate such as paper
- thermal printing process One such process is the thermal printing process.
- a thermal ribbon moves on one
- Printhead over which is assigned a symbol, for example a letter.
- the symbol (the letter) is made up of heatable points.
- the print head is attached to the thermal ink band pressed, the heated symbol comes into direct contact with the carrier.
- the heatable points on the print head can have temperatures of up to 400 ° C and can place high temperatures on the carrier during printing. If a conventional PET film is used as the carrier, softening occurs under such conditions (PET softening temperature: 255 ° C.) and / or the film partially melts and, as a result, the heatable points of the printhead are glued to the carrier material , This will increase the lifespan and / or the
- the high temperature and high contact pressure are necessary in order to transfer the material to be transferred, e.g. B. the melting ink, detach from the carrier and onto the substrate, e.g. a printing paper to transfer.
- a high temperature and a high pressure at certain points are particularly important for achieving sufficient sharpness of the printed image, since the actual transfer of the color takes place when the melting ink is detached from the support.
- the materials of the carrier should be cheap and environmentally friendly to manufacture / dispose of and should have good thermal conductivity so that the melting ink is detached at the desired location and transferred to the substrate.
- EP 0 133 638 A2 discloses a back coating for a carrier, which consists of a closed layer made of wax-like material. This coating protects the carrier and has good sliding properties. Shafts that are necessary for the smooth running of the printing process, however, the adhesion between the coating and the carrier needs to be optimized in order to suppress deposits of the coating on the print head.
- the invention therefore relates to a back coating for a thermal transfer and / or thermal sublimation product, which back coating comprises at least one lubricant and / or lubricant and at least one binder.
- the invention also relates to
- a method for producing a coating of a carrier of a thermal transfer and / or a thermal sub Limitation product comprising the steps of: preparing a dispersion of at least one lubricant and / or lubricant and at least one binder and applying the dispersion to the back of a carrier of a thermal transfer or thermal sublimation product, and the use of the back coating of a thermal transfer and / or thermal sublimation product in printing technology, and - a thermal transfer and / or thermal sublimation product which contains a back coating according to the invention.
- the binder according to the invention is preferably insensitive to higher temperatures and preferably has good adhesion to the carrier. With excellent adhesion to the carrier, the coating leaves no deposits and / or adhesions on the print head of the device.
- the lubricant and / or lubricant is a wax or a wax-like compound.
- “Waxes” have high friction and very low sliding friction and have an excellent lubricating effect. Therefore, a carrier coated in this way also has a low coefficient of friction.
- the properties mentioned are effective against abrasion, e.g. the printhead protective layer, and thus help the device to have a long service life or a long maintenance cycle.
- waxes such as e.g. Ester waxes, partially saponified ester waxes, montan waxes, silicone-modified waxes, polyethylene waxes, paraffins, microcrystalline waxes, higher fatty acids, acid esters and / or acid salts, higher alcohols are used.
- Preferred waxes are partially saponified ester waxes, since the wax soap they contain has very good gliding and anti-sticking properties.
- the binder contains thermoplastics and / or oligomeric polyester polyols.
- the oligomeric polyester polyols have e.g. a molecular weight of 500-7000 g / mol, preferably 1000-5000 g / mol, more preferably 2000-
- thermoplastics have so few reactive groups that they are barely able to react with isocyanates.
- the hydroxyl number of the thermoplastics used is 5-10 (mg KOH / g).
- reactive groups are e.g. -OH or -COOH groups.
- Water-curing isocyanate for example, a matrix of polyisocyanate can be built up, in which the thermoplastic is embedded and docked via the few reactive groups still present.
- aromatic polyisocyanates such as Desmodur L 75 from Bayer AG can be used as isocyanates.
- US 4,735,860, cf. in particular column 4, lines 9-28 The definitions contained therein are incorporated in their entirety in the present invention.
- a binder can be used in which polyester polyols or other functional groups are at least partially reacted with the isocyanate groups. Excellent bonding of the binder to the carrier is achieved.
- the binder can also achieve high temperature stability of the backing and the back coating, i.e. that the thermoplastic properties are shifted towards Duroplast.
- the binder can be thermoplastics such as e.g. Polyurethanes, acrylates, polyester resins, SAN products, vinylidene derivatives, acrylic-vinyl chloride copolymers, butadiene derivatives, polyvinyl acetates, vinyl chloride-vinyl acetate copolymers and / or polyamides.
- Polyurethanes and polyesters with a softening point greater than 200 ° C. are preferred. Further examples are mentioned in US 4,735,860, to which reference is hereby made in full, cf. especially column 4, lines 52-65.
- the combination of lubricant and / or lubricant with the binder causes the carrier coated in this way to shows perfect tape running properties during a printing process.
- the back coating according to the invention has very good adhesion to the carrier, in particular a PET film, so that there are no deposits of the back coating on the print head. Due to the low friction coefficient of the layer, there is almost no abrasion of the printhead, which extends the life of the printhead considerably.
- the back coating comprises other components besides the binding agent and the lubricant and / or lubricant, such as e.g. Slip additives, antistatic agents, and / or fillers.
- additives customary per se such as silicone-modified reactive and non-reactive thermoplastics, silicone oils, silicone waxes, fluorocarbons,
- Ether and / or ester modified silicones are used.
- Phosphoric esters such as e.g. Lecithin, Rhodafac, etc. This is particularly useful for extremely controlled printers with e.g. very short pulse duration prevents the so-called slip-stick effect, which among other things would result in a blurred image reproduction.
- Products which are conventional per se and have a Mohs hardness of ⁇ 3 can also be used as fillers; Products with low sliding values and / or coefficients of friction are particularly recommended.
- the particle shape is also important, and the spherical shape is optimal, because then the ball bearing effect, which the exercise further diminished.
- Preferred fillers are vinylidene fluoride tetrafluoroethylene, Teflon powder, benzoguanamine resin beads (Epostar), Tospearl (silicone beads), micronized waxes, such as, for example, PE and PTFE waxes.
- the best antistatic treatment for three- or multi-layer thermal transfer and / or thermal sublimation products is achieved if one layer, but not the back coating, contains at least 30% by weight carbon black.
- liquid to solid antistatic agents e.g. cationic surfactants, i.e. Compounds with groups such as quaternary ammonium salts, secondary or tertiary amino groups, with anionic antistatic agents
- amphoteric antistatic agents e.g. Amino acids, aminosulfates etc. and / or non-ionic antistatic agents such as e.g. Amino alcohols, glycerin derivatives and / or polyethylene glycol derivatives.
- the figure shows the schematic 4-layer structure of a
- Ribbon 1 You can see the ink layer or the inclayer 2 at the top, including the release layer 3, which on the carrier 4, for example a polyethylene terephthalate (PET) film, on the carrier 4 for better detachment of the ink. lies.
- the backside coating or backing layer 5 At the very bottom is the backside coating or backing layer 5.
- the ink of the inclayer is e.g. as a solvent dispersion and is in an amount of about 3g, for example
- the release layer layer is applied as a hot melt (hot melt) in an amount of preferably approximately 1 g per m 2 .
- the PET film has a thickness of 4.5 ⁇ m.
- the back coating is applied again in a solvent in a thickness of approximately 0.1 g per m 2 .
- Back coating according to Examples 1 to 5 binders, lubricants and / or lubricants, slip additive, filler and / or antistatic agents in a solvent dispersion (for example about 2-5% in THF / Anon 90:10) in a dry strength of about 0.05-1.0 ⁇ m applied.
- a solvent dispersion for example about 2-5% in THF / Anon 90:10
- Conventional coating technologies can be used as the application process.
- the solvents are evaporated by passing hot air at a temperature of about 100 ° C. in a nozzle dryer.
- the invention thus relates to a back coating (back casting, backcoat) of a thermal transfer and / or thermal sublimation product, in which a closed coating with lubricant and / or lubricant and a binder is presented for the first time, so that the coating not only optimizes the sliding properties of the belt be, but also the adhesion of the layer to the carrier is improved. This minimizes the sticking that usually occurs in the process.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002338725A AU2002338725A1 (en) | 2001-10-29 | 2002-09-18 | Coating and method for producing a product obtained by heat transfer and/or heat sublimation, and use of such a product |
DE10294967T DE10294967D2 (en) | 2001-10-29 | 2002-09-18 | Coating of a thermal transfer and / or Thermosublimationspoduktes, process for its preparation and its use |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001152849 DE10152849A1 (en) | 2001-10-29 | 2001-10-29 | Coating a thermal transfer and / or thermal sublimation product, process for its production and its use |
DE10152849.3 | 2001-10-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003037644A2 true WO2003037644A2 (en) | 2003-05-08 |
WO2003037644A3 WO2003037644A3 (en) | 2003-12-04 |
Family
ID=7703783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/010450 WO2003037644A2 (en) | 2001-10-29 | 2002-09-18 | Coating and method for producing a product obtained by heat transfer and/or heat sublimation, and use of such a product |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2002338725A1 (en) |
DE (2) | DE10152849A1 (en) |
WO (1) | WO2003037644A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005009749A1 (en) * | 2003-07-07 | 2005-02-03 | Eastman Kodak Company | Thermal dye transfer donor element having a slipping layer |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0133638A2 (en) | 1983-08-11 | 1985-03-06 | Pelikan Aktiengesellschaft | Thermal ink ribbon and method of making it |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4732815A (en) * | 1984-08-20 | 1988-03-22 | Dai Nippon Insatsu Kabushiki Kaisha | Heat transfer sheet |
US4735860A (en) * | 1985-12-06 | 1988-04-05 | Dai Nippon Insatsu Kabushiki Kaisha | Heat-resistant, thermal-sensitive transfer sheet |
US4916112A (en) * | 1989-06-30 | 1990-04-10 | Eastman Kodak Company | Slipping layer containing particulate ester wax for dye-donor element used in thermal dye transfer |
JPH07108775A (en) * | 1993-10-14 | 1995-04-25 | Mitsubishi Paper Mills Ltd | Thermal transfer image-receiving sheet |
JPH08108642A (en) * | 1994-10-07 | 1996-04-30 | Dainippon Printing Co Ltd | Thermal transfer sheet |
US5668081A (en) * | 1996-07-25 | 1997-09-16 | Eastman Kodak Company | Thermal dye transfer dye-donor element with transferable protection overcoat |
DE19820778C2 (en) * | 1998-05-08 | 2003-02-20 | Pelikan Produktions Ag Egg | Thermal transfer ribbon |
-
2001
- 2001-10-29 DE DE2001152849 patent/DE10152849A1/en not_active Withdrawn
-
2002
- 2002-09-18 AU AU2002338725A patent/AU2002338725A1/en not_active Abandoned
- 2002-09-18 DE DE10294967T patent/DE10294967D2/en not_active Expired - Lifetime
- 2002-09-18 WO PCT/EP2002/010450 patent/WO2003037644A2/en not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0133638A2 (en) | 1983-08-11 | 1985-03-06 | Pelikan Aktiengesellschaft | Thermal ink ribbon and method of making it |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005009749A1 (en) * | 2003-07-07 | 2005-02-03 | Eastman Kodak Company | Thermal dye transfer donor element having a slipping layer |
US7109147B2 (en) | 2003-07-07 | 2006-09-19 | Eastman Kodak Company | Slipping layer containing a branched olefin for a dye-donor element used in thermal dye transfer |
Also Published As
Publication number | Publication date |
---|---|
DE10152849A1 (en) | 2003-05-28 |
DE10294967D2 (en) | 2006-04-27 |
WO2003037644A3 (en) | 2003-12-04 |
AU2002338725A1 (en) | 2003-05-12 |
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