EP0938419A1 - Wärmeempfindlicher aufzeichnungsbogen mit einer rückseitenbeschichtung die stärke, ein acrylatcopolymer und einen alkalischen katalysator enthält - Google Patents
Wärmeempfindlicher aufzeichnungsbogen mit einer rückseitenbeschichtung die stärke, ein acrylatcopolymer und einen alkalischen katalysator enthältInfo
- Publication number
- EP0938419A1 EP0938419A1 EP98946412A EP98946412A EP0938419A1 EP 0938419 A1 EP0938419 A1 EP 0938419A1 EP 98946412 A EP98946412 A EP 98946412A EP 98946412 A EP98946412 A EP 98946412A EP 0938419 A1 EP0938419 A1 EP 0938419A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- sensitive recording
- recording sheet
- sheet according
- alkaline catalyst
- 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.)
- Granted
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
-
- 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
- B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/08—Fastening or securing by means not forming part of the material of the label itself
- G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
-
- 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
- B41M2205/04—Direct thermal recording [DTR]
Definitions
- the invention relates to a heat-sensitive recording sheet having a substrate, a heat-sensitive recording layer arranged on its front side and containing color formers and color acceptors, and a rear-side coating formed on its rear side.
- a recording sheet of the type specified above is known from DE-C-38 36 660.
- the backside coating can be formed from water-soluble high polymers such as starch, gelatin, styrene maleic anhydride copolymer hydrolyzates or polyvinyl alcohol and from water-insoluble polymers such as latices.
- the polymers can be used alone or as a mixture.
- the known back coating is intended to prevent, when used as a label, undesirable influences from plasticizers which are present on a sheet to be provided with the label.
- a barrier layer consisting of water-soluble polymers and a water-repellent wax or a wax-like compound is provided on the back.
- the desired effect is to avoid harmful influences, especially by plastic sealers.
- the back coating and the associated adhesive layer must be transparent.
- the use of pigments such as. B. are often used to improve the thermal head suitability is excluded, so a complicated sequence of the individual process steps is disadvantageously necessary, since the printing process follows immediately after the production of the coating base paper, which is then followed by the further coating and lamination steps.
- US-A-4,593,298 discloses a backside coating comprising an alkali salt of a styrene maleic acid copolymer and a polymeric Latex.
- the water resistance and the block resistance are to be improved.
- the running properties are to be improved and the tendency of the paper to curl is restricted.
- EP-B-0 171 810 describes a back coating in which the durability of the recorded image is to be improved by using a polyurethane emulsion with an application weight of 1 to 5 g / m 2 by preventing liquids, such as plasticizers, Oil, water and solvent penetrate the color development layer from the back.
- EP-A-0 518 552 describes a heat-sensitive recording material in which the substrate consists either of a thermoplastic film or of a synthetic paper.
- a coating applied on the back consists of at least 20% of a water-soluble polymer, such as. B. polyvinyl alcohol, cellulose ether or starch.
- the back coating also contains water-insoluble polymers, such as. B. copolymers of vinyl acetate-acrylic acid esters, methacrylic acid esters and acrylic acid esters, polyurethane resins, polyvinyl chloride resins and polyvinylidene chloride resins.
- a crosslinking agent can be added to the back coating to improve the water resistance.
- a heat-sensitive recording material described in DE-A-37 20 171 which has a colored fluorescent dye composition in its recording layer, is provided on the back with a barrier layer which essentially consists of water-soluble polymer materials, such as polyvinyl alcohol, various cellulose ethers, starch, gelatin, casein and polyvinylpyrolidone as well as water-dispersed resins, such as. B.
- Polystyrene emulsions can be produced.
- the function of the barrier layer is to protect against harmful materials, such as oils and plasticizers, which can discolor the images developed in the recording layer.
- DE-A-38 06 201 discloses a heat-sensitive recording paper in which the paper support has a layer which contains a cationic styrene / acrylic copolymer in order to avoid the formation of dust and flakes when the paper is calendered or supercalendered.
- a further advantage is a wider contact area with the thermal head during recording, a high recording density excellent point rendering, low fog and low adhesion as well as the avoidance of contamination or discoloration on the heat head.
- the cationic styrene / acrylic copolymer can optionally be applied in conjunction with starch, polyvinyl alcohol, a latex, pigment or dye using a size press or a coating device.
- JP-A-60-2397 the surface sizing of a coating base paper is provided which is heat-sensitive for the production
- a primer - underneath the heat-sensitive recording layer it is proposed to provide a primer - underneath the heat-sensitive recording layer.
- a water-soluble copolymer can also be used in addition to a styrene / methacrylate.
- the object of the present invention is therefore to develop a heat-sensitive recording material with a back coating which has a good barrier action against the substances used in offset and flexographic printing, in particular organic solvents and against plasticizers, oils and greases. Furthermore, the blocking of the web wound on a roll in the roll should be prevented.
- the problem is solved in the case of a heat-sensitive recording sheet with a substrate, a heat-sensitive recording layer arranged on its front side and containing color formers and color acceptors, and a rear side coating formed on its rear side in that the rear side coating is formed from a mixture which
- an acrylate copolymer comprising no styrene or vinyl acetate components and having a film-forming temperature of ⁇ 5 ° C.
- acrylate copolymer used in the description and claims includes an acrylate and / or methacrylate To understand copolymer that does not include styrene or vinyl acetate components and preferably has reactive groups.
- the copolymer to be used according to the invention can be in the form of an aqueous dispersion or emulsion.
- the use of an alkaline catalyst ensures the crosslinking of the acrylate copolymer and counteracts the tendency of the paper web to block.
- starch also means starch derivatives, such as starch ethers and starch esters, in addition to starch itself.
- starch and the acrylate copolymer are cationic.
- a paper consisting mainly of cellulose fibers is preferably used as the substrate, in particular a paper is preferred whose fibrous material consists of wood-free cellulose fibers.
- the excellent barrier effect is probably explained by the film-forming properties of the acrylate copolymer, which forms a relatively soft and slightly sticky film without the addition of starch according to the invention.
- the backside coating be based on it Total weight, contains 40 to 50 parts by weight of starch.
- the back coating based on its total weight, contain 30 to 40 parts by weight of the acrylate copolymer.
- the backside coating contains 9 to 28 parts by weight, very particularly preferably 13 to 24 parts by weight, of the alkaline catalyst.
- Metal carbonates have proven to be suitable alkaline catalysts, in particular calcium carbonate and magnesium carbonate have proven suitable, a precipitated calcium carbonate being very particularly preferred.
- sodium carbonate is unsuitable because the sodium ions can cause corrosion of the thermal head. Potassium and chloride compounds are also unsuitable.
- the back coating can contain a crosslinking aid, in particular an epichlorohydrin resin.
- an application weight of 1 to 3 g / m 2 for the backside coating in particular in the range from 1.5 to 2.5 g / m 2 , has proven to be suitable.
- Back coating is not to be confused with the long-known use of cationic sizing agents, such as those added to the fibrous material for mass sizing or possibly also applied as surface sizing agents by means of a size press or similar devices. These known application methods do not lead to a closed film, as is produced on one side of a paper web with the back coating provided according to the invention.
- the heat-sensitive recording paper according to the invention is used as a label in food packaging and is particularly suitable for labeling labels for frozen foods to be applied with special glues.
- the backside coating according to the invention prevents the penetration of plasticizers into the label in this application, so that there is no discoloration or change in the typeface produced on the front side in the heat-sensitive recording layer.
- the heat-sensitive recording layer is covered with a protective layer
- Another area of application is the production of tickets printed on the back with additional information, but in particular of those tickets which are printed on the back with solvent-containing magnetic strips.
- aqueous preparation consisting of 47 parts by weight of cationic starch, 16 parts by weight of precipitated calcium carbonate and 37 parts by weight of a cationic acrylate copolymer free of styrene or vinyl acetate components was prepared.
- the preparation was adjusted to a solids content of 18% by weight - pH 7.5 - and applied in an amount of 2.2 g / m 2 to a base paper and dried.
- the other side of the coated fabric web was provided with an intermediate layer for receiving the heat-sensitive recording layer, the essential components of which consisted of an oil-absorbing pigment and binder.
- the intermediate layer formed was then provided with a conventional heat-sensitive recording layer.
- a further preparation with an 18% solids content was prepared from the same components, but using 44 parts by weight of cationic starch, 34 parts by weight of an aqueous cationic acrylate polymer and 22 parts by weight of precipitated calcium carbonate.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
- Paper (AREA)
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997140072 DE19740072A1 (de) | 1997-09-12 | 1997-09-12 | Wärmeempfindlicher Aufzeichnungsbogen |
DE19740072 | 1997-09-12 | ||
DE19748258 | 1997-10-31 | ||
DE1997148258 DE19748258A1 (de) | 1997-10-31 | 1997-10-31 | Wärmeempfindlicher Aufzeichnungsbogen |
PCT/EP1998/005347 WO1999014056A1 (de) | 1997-09-12 | 1998-08-22 | Wärmeempfindlicher aufzeichnungsbogen mit einer rückseitenbeschichtung, die stärke, ein acrylatcopolymer und einen alkalischen katalysator enthält |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0938419A1 true EP0938419A1 (de) | 1999-09-01 |
EP0938419B1 EP0938419B1 (de) | 2000-11-15 |
Family
ID=26039914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98946412A Expired - Lifetime EP0938419B1 (de) | 1997-09-12 | 1998-08-22 | Wärmeempfindlicher aufzeichnungsbogen mit einer rückseitenbeschichtung die stärke, ein acrylatcopolymer und einen alkalischen katalysator enthält |
Country Status (7)
Country | Link |
---|---|
US (1) | US6326330B1 (de) |
EP (1) | EP0938419B1 (de) |
JP (1) | JP2001505150A (de) |
AT (1) | ATE197574T1 (de) |
DE (1) | DE59800342D1 (de) |
ES (1) | ES2153707T3 (de) |
WO (1) | WO1999014056A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10108982A1 (de) * | 2001-02-23 | 2002-09-12 | Mitsubishi Hitec Paper Flensbu | Wärmeempfindliches Aufzeichnungsmaterial und seine Verwendung |
US6833913B1 (en) | 2002-02-26 | 2004-12-21 | Kla-Tencor Technologies Corporation | Apparatus and methods for optically inspecting a sample for anomalies |
DE502007002946D1 (de) * | 2007-09-10 | 2010-04-08 | Mitsubishi Hitec Paper Flensbu | Wärmeempfindliches Aufzeichnungsmaterial mit Rückseitenbeschichtung |
EP2480415B1 (de) * | 2009-09-21 | 2013-08-14 | Mitsubishi HiTec Paper Europe GmbH | Wärmeempfindliches aufzeichnungsmaterial mit rückseitenbeschichtung |
EP2329959B1 (de) | 2009-12-01 | 2012-08-29 | Mitsubishi HiTec Paper Europe GmbH | Wärmeempfindliches Aufzeichnungsmaterial mit Barrierebeschichtung |
EP2329958B1 (de) | 2009-12-01 | 2012-10-03 | Mitsubishi HiTec Paper Europe GmbH | Wärmeempfindliches Aufzeichnungsmaterial mit Rückseitenbeschichtung |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57146686A (en) * | 1981-03-05 | 1982-09-10 | Ricoh Co Ltd | Thermal recording type label sheet |
JPS58199189A (ja) | 1982-05-17 | 1983-11-19 | Toppan Printing Co Ltd | 感熱記録材料 |
JPS602397A (ja) | 1983-06-21 | 1985-01-08 | Ricoh Co Ltd | 感熱記録材料 |
JPS6147292A (ja) | 1984-08-15 | 1986-03-07 | Jujo Paper Co Ltd | 感熱記録紙 |
DE3529781A1 (de) | 1984-08-20 | 1986-02-20 | Ricoh Co., Ltd., Tokio/Tokyo | Waermeempfindliches klebe-aufzeichnungsmaterial |
GB2166558B (en) | 1984-08-30 | 1988-09-21 | Fuji Photo Film Co Ltd | Heat-sensitive recording paper |
SE500916C2 (sv) * | 1986-06-16 | 1994-10-03 | Ricoh Kk | Termokänsligt registreringsmaterial med registreringsskikt innehållande fluorescensfärgämneskomposition |
US4855277A (en) | 1986-06-16 | 1989-08-08 | Hobart Corporation | Thermosensitive recording material having recording layer containing fluorescent dye |
JPS63209990A (ja) * | 1987-02-27 | 1988-08-31 | Fuji Photo Film Co Ltd | 感熱記録紙 |
JP2528905B2 (ja) | 1987-10-27 | 1996-08-28 | 三菱製紙株式会社 | 感熱記録体の製造方法 |
JPH04364983A (ja) | 1991-06-12 | 1992-12-17 | Oji Paper Co Ltd | 感熱記録体 |
DE69305308T2 (de) | 1992-12-10 | 1997-03-20 | Mitsubishi Paper Mills Ltd | Aufzeichnungsblatt für Tintenstrahlschreiber |
-
1998
- 1998-08-22 AT AT98946412T patent/ATE197574T1/de active
- 1998-08-22 US US09/297,987 patent/US6326330B1/en not_active Expired - Fee Related
- 1998-08-22 DE DE59800342T patent/DE59800342D1/de not_active Expired - Lifetime
- 1998-08-22 WO PCT/EP1998/005347 patent/WO1999014056A1/de active IP Right Grant
- 1998-08-22 JP JP51734199A patent/JP2001505150A/ja active Pending
- 1998-08-22 EP EP98946412A patent/EP0938419B1/de not_active Expired - Lifetime
- 1998-08-22 ES ES98946412T patent/ES2153707T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9914056A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0938419B1 (de) | 2000-11-15 |
US6326330B1 (en) | 2001-12-04 |
JP2001505150A (ja) | 2001-04-17 |
WO1999014056A1 (de) | 1999-03-25 |
ES2153707T3 (es) | 2001-03-01 |
DE59800342D1 (de) | 2000-12-21 |
ATE197574T1 (de) | 2000-12-15 |
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