EP0092988A2 - Offsetdruck - Google Patents
Offsetdruck Download PDFInfo
- Publication number
- EP0092988A2 EP0092988A2 EP83302297A EP83302297A EP0092988A2 EP 0092988 A2 EP0092988 A2 EP 0092988A2 EP 83302297 A EP83302297 A EP 83302297A EP 83302297 A EP83302297 A EP 83302297A EP 0092988 A2 EP0092988 A2 EP 0092988A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- ink
- intermediate surface
- pad
- silicone rubber
- rubber
- 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
- 238000007645 offset printing Methods 0.000 title claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 38
- 229920001971 elastomer Polymers 0.000 claims abstract description 31
- 239000005060 rubber Substances 0.000 claims abstract description 31
- 239000003054 catalyst Substances 0.000 claims abstract description 18
- 238000012546 transfer Methods 0.000 claims abstract description 15
- 238000009833 condensation Methods 0.000 claims abstract description 10
- 230000005494 condensation Effects 0.000 claims abstract description 10
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims abstract description 7
- 239000012975 dibutyltin dilaurate Substances 0.000 claims abstract description 7
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 29
- 239000004945 silicone rubber Substances 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- 238000007639 printing Methods 0.000 claims description 5
- 125000005474 octanoate group Chemical group 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 150000001734 carboxylic acid salts Chemical group 0.000 claims description 3
- 230000003252 repetitive effect Effects 0.000 claims description 3
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 claims description 2
- 229940070765 laurate Drugs 0.000 claims description 2
- 239000000976 ink Substances 0.000 description 58
- 238000001723 curing Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 238000007650 screen-printing Methods 0.000 description 7
- 238000009472 formulation Methods 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- OVSKIKFHRZPJSS-UHFFFAOYSA-N 2,4-D Chemical compound OC(=O)COC1=CC=C(Cl)C=C1Cl OVSKIKFHRZPJSS-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 150000001242 acetic acid derivatives Chemical class 0.000 description 2
- 238000013006 addition curing Methods 0.000 description 2
- 238000013005 condensation curing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 125000005609 naphthenate group Chemical group 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 239000001828 Gelatine Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012940 design transfer Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical class CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/40—Printing on bodies of particular shapes, e.g. golf balls, candles, wine corks
Definitions
- This invention relates to repetitive off-set printing processes of the kind in which a deformable pad is employed to transfer an ink design to an article.
- Off-set transfer pad processes for printing onto complex shapes are well established in the ceramic, plastics, toy and packaging industries. The majority of these processes use a deformable gelatine or silicone rubber pad to transfer an ink design from an intaglio metal plate to the items to be decorated or marked.
- the metal plate can be engraved or etched.
- U.K. Patent Specification 737 461 has proposed replacing the intaglio metal plate by a silk screen and an intermediate flat surface.
- the ink design is applied to the intermediate flat surface by screen printing and then transferred to the item to be marked or decorated by means of the deformable pad.
- the intermediate surface can be any non-absorbent material, and examples of metal or glass were given.
- the ink film on the intermediate surface split on removal of the deformable pad from the intermediate surface. The result was that the design ink spread with successive prints and there was a loss of definition.
- the present invention stems from attempts to provide . an improved off-set printing process, where the ink design on the intermediate surface is transferred substantially completely to the item to be marked or decorated by the deformable pad.
- the basis for the present invention lies in our discovery that the relative affinity of an ink for the intermediate surface, deformable pad and work piece can be controlled by the use of two dissimilar silicone rubbers for pad and intermediate surface, the silicone rubbers differing in the catalysts that are employed in curing of the rubbers.
- U.S. Specification No. 4,261,749 is concerned with a thermoplastic ink formulation for use in an off-set process in which an ink design is applied to a silicone elastomer intermediate surface and is then transferred to the ware by a further silicone elastomer. It is stated at lines 47 to 51 of column 4 that 'it is highly desirable to have as great a difference in surface energy as possible between the two silicone surfaces in order to facilitate ink release from one to the other', but no details are given of what rubbers are to be employed. It would appear that it was contemplated to provide different surface energies by employing different compositions of rubber, such as by varying the phenyl/methyl ratio as was previously known.
- U.S. Specification No. 4 261 749 is concerned with devising an ink formulation to accommodate changes in ink affinity of the silicone rubber surfaces which occur in use, whereas the present invention is concerned with providing substantially stable ink affinities of the two surfaces, so that the silicone rubber surfaces rarely, if ever, require replacement to alter ink affinity.
- a repetitive off-set printing process in which an ink design is first applied to an intermediate surface from which it is then transferred to an article by a deformable pad, the intermediate surface and the pad being formed of first and second silicone rubbers respectively, the first and second rubbers employing different catalysts in the curing thereof, and the catalysts being chosen such that the affinity of the first silicone rubber for the ink is substantially less than the affinity of the second silicone rubber for the ink.
- the intermediate surface is preferably flat.
- the ink design may be applied to the intermediate surface by any suitable method. Preferably silk screening will be employed, but other stencilling operations may be used.
- condensation type silicone rubbers having a wide range of ink affinities can be produced by employing as catalysts the carboxylic acid salts of various metals such as Pb, Zn, Zr, Sb, Fe, Cd, Sn, Ba, Ca, and Mn.
- ink affinities is provided by the following list of salts: metal naphthenates, octoates, hexoates, laurates and acetates, the ink affinity generally reducing through the list.
- silicone rubbers of the condensation type and using dibutyltindilaurate as the catalyst in the curing process, have much less affinity for ink than condensation cure rubbers using most other catalysts in the curing process or addition cure rubbers.
- a stabilised dibutyltindilaurate catalysed silicone rubber provides an . ideal material for the intermediate surface. It is able to accept ink from the silk screen to form a design of high definition but then, on subsequent pressure contact from a deformable pad of a suitably dissimilar silicone rubber, due to differences in ink affinity, it gives up the ink design 100% to the pad.
- An electrically heated metal screen is conveniently used, but an externally heated screen may be employed.
- the ink should be compatible with the silicone rubber of both transfer pad and intermediate surface and not induce significant deterioration in either during the period of printing. It has been found that inks meeting all the above criteria are preferably composed of a solid resin, a liquid resin, a wax and a ceramic pigment.
- the wax should have a melting point below the desired silk-screen temperature and the solid resin a melting point above this temperature. Viscosity control at the silk screen is effected by adjustment to the solid/liquid resin ratio and tack at the transfer stage by the wax to total resin ratio.
- an off-set printing machine suitable for use in printing onto the curved surface of an article comprises an intermediate surface, means for applying an ink design to the intermediate surface, a deformable pad, means for bringing the deformable pad into register with the intermediate surface to pick up the ink design, and means for bringing the pad carrying the ink design into register with the article to transfer the ink design to the article;
- the intermediate surface and the pad being formed of first and second silicone rubbers respectively, the first and second rubbers employing different catalysts in the curing thereof, and the catalysts being chosen such that the affinity of the first silicone rubber for ink is substantially less than the affinity of the second silicone rubber for the ink.
- an electrically heated metal screen and an ink formulation are employed such that, at the temperature of the screen, the ink viscosity is correct for screen printing.
- the ink in the form of the required design is screened onto the intermediate surface of stabilised dibutyltindilaurate catalysed silicone rubber which is heated to a lower temperature than the screen, such that after screening the tack properties of the ink dominate.
- a deformable pad of dissimilar silicone rubber for example addition cured or octoate-catalysed condensation cured, is used to pick up the ink design 100% from the intermediate surface. In the final stage of the operation the pad transfers the ink design 100% to the work piece.
- the process is illustrated diagrammatically in the accompanying single Figure in which the reference numeral 1 designates the heated silk screen, 2 designates the ink design, 3 designates the heated intermediate surface, 4 designates the deformable pad, and 5 designates the work piece.
- Rhodia Ltd. Hulton House 161-166 Fleet Street LONDON EC4 2DP
- Rhodia Ltd. Hulton House 161-166 Fleet Street LONDON EC4 2DP
- Example (B1) or (B2) is produced as a thin uniform layer, 0.5 to 5 mms in thickness, on a metal backing. Following fabrication and cure the rubber is stabilised by heat treating for 4 h. at 110°C.
- the ink is produced by intimate mixing either by bead or triple roll mill.
Landscapes
- Printing Methods (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8211917 | 1982-04-24 | ||
| GB8211917 | 1982-04-24 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0092988A2 true EP0092988A2 (de) | 1983-11-02 |
| EP0092988A3 EP0092988A3 (en) | 1985-05-22 |
| EP0092988B1 EP0092988B1 (de) | 1990-06-20 |
Family
ID=10529934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19830302297 Expired EP0092988B1 (de) | 1982-04-24 | 1983-04-22 | Offsetdruck |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0092988B1 (de) |
| JP (1) | JPS5926264A (de) |
| DE (1) | DE3381677D1 (de) |
| GB (1) | GB2118900B (de) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0106543A2 (de) * | 1982-09-17 | 1984-04-25 | Corning Glass Works | Sammelmembran |
| EP0365135A1 (de) * | 1988-09-23 | 1990-04-25 | Service (Engineers) Plc | Mehrfarbiger Offset-Druck |
| FR2705277A1 (fr) * | 1993-05-14 | 1994-11-25 | Elmetherm | Installation de décoration de pièces, notamment en céramique ou verre, à l'aide de chromos ou de motifs à l'encre et procédé de fonctionnement. |
| EP0662683A1 (de) * | 1994-01-07 | 1995-07-12 | Pilkington Plc | Substrat für eine Magnetplatte und Herstellungsverfahren dafür |
| CN102378692A (zh) * | 2009-04-01 | 2012-03-14 | 株式会社秀峰 | 印刷方法及被印刷体 |
| DE102021000892A1 (de) | 2021-02-19 | 2022-08-25 | Giesecke+Devrient Currency Technology Gmbh | Sicherheitselement mit bei IR-Beleuchtung transparenten Druckfarben und einem maschinenlesbaren Merkmal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3554836A (en) * | 1968-07-19 | 1971-01-12 | Minnesota Mining & Mfg | Transfer process |
| GB1317060A (en) * | 1969-08-02 | 1973-05-16 | Philipp W | Printing method and apparatus for performing the printing method |
-
1983
- 1983-04-22 EP EP19830302297 patent/EP0092988B1/de not_active Expired
- 1983-04-22 GB GB08311031A patent/GB2118900B/en not_active Expired
- 1983-04-22 DE DE8383302297T patent/DE3381677D1/de not_active Expired - Fee Related
- 1983-04-25 JP JP7277883A patent/JPS5926264A/ja active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3554836A (en) * | 1968-07-19 | 1971-01-12 | Minnesota Mining & Mfg | Transfer process |
| GB1317060A (en) * | 1969-08-02 | 1973-05-16 | Philipp W | Printing method and apparatus for performing the printing method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0106543A2 (de) * | 1982-09-17 | 1984-04-25 | Corning Glass Works | Sammelmembran |
| EP0106543A3 (de) * | 1982-09-17 | 1985-05-22 | Corning Glass Works | Sammelmembran |
| EP0365135A1 (de) * | 1988-09-23 | 1990-04-25 | Service (Engineers) Plc | Mehrfarbiger Offset-Druck |
| FR2705277A1 (fr) * | 1993-05-14 | 1994-11-25 | Elmetherm | Installation de décoration de pièces, notamment en céramique ou verre, à l'aide de chromos ou de motifs à l'encre et procédé de fonctionnement. |
| EP0662683A1 (de) * | 1994-01-07 | 1995-07-12 | Pilkington Plc | Substrat für eine Magnetplatte und Herstellungsverfahren dafür |
| US5499731A (en) * | 1994-01-07 | 1996-03-19 | Pilkington Plc | Substrate for a magnetic disc and manufacture thereof |
| US5681636A (en) * | 1994-01-07 | 1997-10-28 | Pilkington Plc | Magnetic recording disc substrate having a surface texture of non overlapping circular sub-arrays |
| CN102378692A (zh) * | 2009-04-01 | 2012-03-14 | 株式会社秀峰 | 印刷方法及被印刷体 |
| US8893617B2 (en) | 2009-04-01 | 2014-11-25 | Shuhou Co., Ltd. | Printing method and to-be-printed object |
| CN102378692B (zh) * | 2009-04-01 | 2015-01-14 | 株式会社秀峰 | 印刷方法及被印刷体 |
| DE102021000892A1 (de) | 2021-02-19 | 2022-08-25 | Giesecke+Devrient Currency Technology Gmbh | Sicherheitselement mit bei IR-Beleuchtung transparenten Druckfarben und einem maschinenlesbaren Merkmal |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2118900A (en) | 1983-11-09 |
| GB8311031D0 (en) | 1983-05-25 |
| JPS5926264A (ja) | 1984-02-10 |
| EP0092988B1 (de) | 1990-06-20 |
| GB2118900B (en) | 1985-10-23 |
| EP0092988A3 (en) | 1985-05-22 |
| JPH0346307B2 (de) | 1991-07-15 |
| DE3381677D1 (de) | 1990-07-26 |
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| 17P | Request for examination filed |
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|
| 17Q | First examination report despatched |
Effective date: 19870206 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
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