EP0238242B1 - Ink sheet for thermal transfer recording - Google Patents
Ink sheet for thermal transfer recording Download PDFInfo
- Publication number
- EP0238242B1 EP0238242B1 EP87301997A EP87301997A EP0238242B1 EP 0238242 B1 EP0238242 B1 EP 0238242B1 EP 87301997 A EP87301997 A EP 87301997A EP 87301997 A EP87301997 A EP 87301997A EP 0238242 B1 EP0238242 B1 EP 0238242B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ink sheet
- ink
- thermal transfer
- ester oligomer
- transfer recording
- 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
Links
- 239000000463 material Substances 0.000 claims description 26
- 150000002148 esters Chemical class 0.000 claims description 18
- 238000004040 coloring Methods 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 16
- 230000008018 melting Effects 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 238000012643 polycondensation polymerization Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- 150000008065 acid anhydrides Chemical class 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 13
- -1 polyethylene terephthalate Polymers 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 239000001993 wax Substances 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 4
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 235000013869 carnauba wax Nutrition 0.000 description 3
- 239000004203 carnauba wax Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- ALVZNPYWJMLXKV-UHFFFAOYSA-N 1,9-Nonanediol Chemical compound OCCCCCCCCCO ALVZNPYWJMLXKV-UHFFFAOYSA-N 0.000 description 1
- ALQSHHUCVQOPAS-UHFFFAOYSA-N Pentane-1,5-diol Chemical compound OCCCCCO ALQSHHUCVQOPAS-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- FOTKYAAJKYLFFN-UHFFFAOYSA-N decane-1,10-diol Chemical compound OCCCCCCCCCCO FOTKYAAJKYLFFN-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 235000010985 glycerol esters of wood rosin Nutrition 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 238000007757 hot melt coating Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 1
- OEIJHBUUFURJLI-UHFFFAOYSA-N octane-1,8-diol Chemical compound OCCCCCCCCO OEIJHBUUFURJLI-UHFFFAOYSA-N 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002589 poly(vinylethylene) polymer Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 150000007519 polyprotic acids Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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
-
- 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
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
- B41M5/395—Macromolecular additives, e.g. binders
Definitions
- the present invention relates to an ink sheet for thermal transfer recording. Particularly, it relates to an ink composition which forms a coloring material layer (ink layer) of such an ink sheet.
- An ink sheet for thermal transfer recording comprises a support such as paper or plastic film and a coloring material layer applied thereon and printing is carried out by fusing a solid ink and transferring the fused ink to a recording paper.
- the heating is carried out by the use of a heating element either from the coloring material-coated surface of the sheet via paper or from the other surface (i.e., coloring material-uncoated surface) thereof. Alternatively, it may be carried out by applying an electric current to a resistant layer formed in an ink sheet.
- the coloring material layer is composed of a composition comprising a heat-fusible material and a pigment or dyestuff as a coloring material.
- carnauba wax or paraffin wax is generally used as the heat-fusible material
- polyethylene terephthalate film or polycarbonate film excellent in surface smoothness and dimensional stability is generally sued as the support.
- Transfer of an image from an ink sheet for thermal transfer recording to paper or the like is generally carried out with a thermal transfer printer having a thermal head and it is preferred in this transfer that the heat energy required for printing be as low as possible, because a decrease in heat energy required for printing serves not only to shorten the heating-cooling cycle time of the head to thereby accelerate printing and protect the head from thermal deterioration, but also to miniaturize the electric source of a line printer. Further, the decrease can make up a deficiency in heat resistance of base film. However, when an ink sheet containing a low-melting ink composition.
- thermo-plastic polymers to ink compositions.
- processes characterized by the addition of polyethylene wax Japanese Patent Laid-Open No. 101094/1983
- ethylene-alkyl acrylate copolymer Japanese Patent Laid-Open No. 120092/1985
- 1,2-polybutadiene Japanese Patent Laid-Open No. 127193/1985
- the inventors of the present invention have studied to solve the above problems and have found that an ink composition which can form a fast coating film, exhibits a high transfer sensitivity enough to carry out low-energy printing and does not stain a non-image area can be obtained by using an ester oligomer having a specified melting point and a specified molecular weight as a main component of the heat-fusible material of the ink composition.
- the invention provides an ink sheet for the thermal transfer recording which comprises a base layer coated with an ink layer, said ink layer comprising a colouring material and/or an inorganic or organic fine powder and a heat-fusible material containing 40 or more percent by weight of an ester oligomer having a number-average molecular weight of 500 to 6,000 and a melting point of 60 to 110°c.
- the above object is attained by using an ester oligomer having a melting point of 60 to 110°C and a number-average molecular weight of 500 to 6000. Therefore, the present invention is different in this point from the process of the prior art characterized by using a composition comprising a heat-fusible material (for example, wax) having a low melting point which serves to allow low-energy printing as a main component and a small amount of a high-melting thermoplastic resin which serves to prevent a non-image area from being stained with the low-melting material.
- a heat-fusible material for example, wax
- the ink sheet according to the present invention comprises a support and a coloring material layer containing a heat-fusible material applied thereon, wherein said heat-fusible material contains at least 40% by weight of the above ester oligomer to thereby attain the above object. If the ester oligomer content is less than 40% by weight, the obtained ink sheet will not exhibit high transfer sensitivity inherent in the ester oligomer.
- the ink sheet for thermal transfer recording comprises a base film as a support and at least one coloring material layer applied thereon and the coloring material layer contains at least one ester oligomer.
- the coloring material layer further contains at least one coloring material or/and an inorganic or organic fine powder.
- the coloring material is not particularly limited and may be any ordinary dye or pigment of yellow, red, blue, black or the like. For example, carbon black or oil black can be used as a black pigment.
- the fine powder to be used in the present invention can be selected depending upon the object and may be magnetic powder, other metal powder or conductive fine powder.
- the ester oligomer to be used in the present invention is synthesized by the condensation polymerization between a polyhydric alcohol and a polybasic acid, preferably between a dihydroxy compound and a dibasic acid or anhydride thereof and has a lower degree of polymerization than that of the polyethylene terephthalate of the prior art. Therefore, the ester oligomer melts at a relatively low temperature and in a narrow temperature range, thus being suitable as a heat-fusible material for a thermal transfer ink.
- the number-average molecular weight and melting point of the ester oligomer is 300 to 10000 (calculated by the end-group analysis) and from 40 to 120°C, respectively, preferably 500 to 6000 and 60 to 110°C (determined by the ring-and-ball method), respectively.
- the above condensation polymerization may be carried out by an ordinary process.
- dibasic acid examples include adipic, azelaic, sebacic, succinic and dodecanedoic acids
- dihydroxy compound examples include ethylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol and neopentyl glycol.
- ester oligomers may be used or a mixture of two or more of them may be used.
- the ester oligomer may be used together with an ordinary wax (for example, paraffin or carnauba wax), a rosin derivative (for example, hydrogenated rosin or ester gum), polyethylene wax, ethylene-alkyl acrylate or the like.
- the ink sheet according to the present invention comprises a base film and at least one coloring material layer applied thereon and, if necessary, other layers such as a topcoat or a resistance layer for electric heating.
- the support to be used in the ink sheet according to the present invention is preferably one which is resistant to heat and excellent in dimensional stability and surface smoothness.
- polyethylene terephthalate films which have been used as the base film up to this time and resin films having a thickness of 2 to 20 ⁇ and made of polycarbonate, polyethylene, polystyrene, polypropylene, polyimide or the like can be preferably used.
- the ink sheet for thermal transfer recording according to the present invention contains an ester oligomer having a low melting point of 60 to 110°C as a heat-fusible material, so that the ink sheet exhibits high transfer sensitivity and allows low-energy printing, thus being suitable for high-speed printing. Further, the ink sheet gives a printing having no unevenness without lowering the fastness thereof and is not in danger of causing blocking, because the ink sheet contains only a very small amount of low-melting components having a melting point of lower than 55°C.
- polydecamethylene adipate (number-average molecular weight : 1600 80 parts melting point : 73°C) rosin ester HS (a product of Arakawa Chemical) 5 carbon black 15
- a mixture comprising the above components was kneaded with 200 parts of toluene in a ball mill for 12 hours to obtain a homogeneous coating fluid.
- This coating fluid was applied to a polyethylene terephthalate film having a thickness of 6 ⁇ (a product of Toray Industries, Inc.; Lumirror) with a wire bar to form a coloring material layer having a thickness after drying of 3.5 ⁇ on the film, thus producing an ink sheet for thermal transfer recording.
- Printing on paper was carried out by the use of the obtained ink sheet and a thermal transfer printer of line type (NIP 5234, 9.4 dots/mm, a product of Nippon Electric Co., Ltd.) to determine the density of the transferred image.
- line type Nippon Electric Co., Ltd.
- the pulse width of the voltage to be applied was changed between 0.65 and 0.85 second by operating a density-controlling lever to measure the density of transferred image at each pulse width with a Macbeth densitometer (RD 514 type).
- RD 514 type Macbeth densitometer
- the pulse width of the voltage applied for the formation of transferred image having a density of 1.2 was found to be 0.66 millisecond. No stain was observed in the non-image area.
- Five ink sheets for thermal transfer were piled up and preserved under a pressure of 500g/cm2 for one week. The sheets were taken out and examined for blocking. No blocking was observed at all.
- polyhexamethylene sebacate (number-average molecular weight : 3200 80 parts melting point : 75°C rosin ester HS (A product of Arakawa Chemical) 5 parts carbon black 15
- Example 2 The same procedure as the one described in Example 1 was repeated except that a mixture comprising the above components was used insted of the mixture used in Example 1 to carry out the production of an ink sheet and printing.
- the density of transferred image was measured with a Macbeth densitometer (RD 514 type).
- the pulse width of the voltage applied for the formation of transferred image having a density of 1.2 was 0.66 millisecond.
- a mixture comprising the above components was dispersed with an attritor of 100°C for 4 hours to obtain an ink.
- This ink was applied to a polyethylene terephthalate film having a thickness of 6 ⁇ by hot-melt coating to produce an ink sheet having an ink layer having a thickness of 3.5 ⁇ .
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61767/86 | 1986-03-19 | ||
| JP61061767A JPS62216790A (ja) | 1986-03-19 | 1986-03-19 | 熱転写記録用インクシ−ト |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0238242A2 EP0238242A2 (en) | 1987-09-23 |
| EP0238242A3 EP0238242A3 (en) | 1989-05-10 |
| EP0238242B1 true EP0238242B1 (en) | 1991-12-27 |
Family
ID=13180597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87301997A Expired - Lifetime EP0238242B1 (en) | 1986-03-19 | 1987-03-09 | Ink sheet for thermal transfer recording |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0238242B1 (ja) |
| JP (1) | JPS62216790A (ja) |
| KR (1) | KR910007068B1 (ja) |
| DE (1) | DE3775440D1 (ja) |
| ES (1) | ES2028068T3 (ja) |
| MY (1) | MY100923A (ja) |
| SG (1) | SG124792G (ja) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2538640B2 (ja) * | 1988-04-27 | 1996-09-25 | 花王株式会社 | 感熱転写用インク及びインクフィルム |
| FR2635109B1 (fr) * | 1988-08-04 | 1994-06-03 | Regma | Compositions d'encres pour materiaux d'enregistrement par transferts thermiques reutilisables et materiaux d'enregistrement reutilisables |
| US5269866A (en) * | 1988-09-02 | 1993-12-14 | Canon Kabushiki Kaisha | Thermal transfer material and thermal transfer recording method |
| FR2636007B1 (fr) * | 1988-09-02 | 1992-02-21 | Canon Kk | Matiere pour transfert thermique et procede d'enregistrement par transfert thermique |
| BR9006798A (pt) * | 1989-06-09 | 1991-08-13 | Avery International Corp | Revestimentos receptivos a impressao |
| JP3051131B2 (ja) * | 1989-07-13 | 2000-06-12 | 三井化学株式会社 | 熱転写記録媒体 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1405233A (fr) * | 1963-02-07 | 1965-07-09 | Gevaert Photo Prod Nv | Procédé d'enregistrement et de reproduction thermographique |
| DE1571819A1 (de) * | 1965-06-22 | 1970-04-02 | Agfa Gevaert Ag | Thermographisches Verfahren zur Herstellung waermebestaendiger Kopien |
| JPS57160691A (en) * | 1981-03-31 | 1982-10-04 | Fujitsu Ltd | Ink composition for heat transfer recording and heat transfer recording ink sheet employing said composition |
| JPS59201895A (ja) * | 1983-05-02 | 1984-11-15 | Konishiroku Photo Ind Co Ltd | 感熱転写記録媒体 |
| JPS59232892A (ja) * | 1983-06-15 | 1984-12-27 | Ricoh Co Ltd | 感熱転写媒体 |
| JPS60196395A (ja) * | 1984-03-20 | 1985-10-04 | Dainippon Printing Co Ltd | 塗工材料及びシ−ト |
| JPS6040295A (ja) * | 1984-03-30 | 1985-03-02 | Nippon Telegr & Teleph Corp <Ntt> | 感熱性多数回転写材 |
| JPS61217290A (ja) * | 1985-03-23 | 1986-09-26 | Mitsubishi Paper Mills Ltd | 階調記録用熱転写シ−ト |
| US4684271A (en) * | 1986-01-15 | 1987-08-04 | Pitney Bowes Inc. | Thermal transfer ribbon including an amorphous polymer |
| US4687360A (en) * | 1986-01-15 | 1987-08-18 | Pitney Bowes Inc. | Thermal imaging ribbon including a partially crystalline polymer |
-
1986
- 1986-03-19 JP JP61061767A patent/JPS62216790A/ja active Granted
-
1987
- 1987-03-09 ES ES198787301997T patent/ES2028068T3/es not_active Expired - Lifetime
- 1987-03-09 DE DE8787301997T patent/DE3775440D1/de not_active Expired - Fee Related
- 1987-03-09 EP EP87301997A patent/EP0238242B1/en not_active Expired - Lifetime
- 1987-03-10 MY MYPI87000268A patent/MY100923A/en unknown
- 1987-03-14 KR KR1019870002294A patent/KR910007068B1/ko not_active IP Right Cessation
-
1992
- 1992-12-09 SG SG1247/92A patent/SG124792G/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0238242A3 (en) | 1989-05-10 |
| KR870008707A (ko) | 1987-10-20 |
| JPH0434957B2 (ja) | 1992-06-09 |
| DE3775440D1 (de) | 1992-02-06 |
| MY100923A (en) | 1991-05-31 |
| KR910007068B1 (ko) | 1991-09-16 |
| SG124792G (en) | 1993-02-19 |
| EP0238242A2 (en) | 1987-09-23 |
| ES2028068T3 (es) | 1992-07-01 |
| JPS62216790A (ja) | 1987-09-24 |
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