WO2007039656A2 - Systeme et procede d'impression de substrats avec des encres aqueuses durcissables au moyen d'un rayonnement de faisceau electronique - Google Patents

Systeme et procede d'impression de substrats avec des encres aqueuses durcissables au moyen d'un rayonnement de faisceau electronique Download PDF

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Publication number
WO2007039656A2
WO2007039656A2 PCT/ES2006/000547 ES2006000547W WO2007039656A2 WO 2007039656 A2 WO2007039656 A2 WO 2007039656A2 ES 2006000547 W ES2006000547 W ES 2006000547W WO 2007039656 A2 WO2007039656 A2 WO 2007039656A2
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WO
WIPO (PCT)
Prior art keywords
substrate
inks
printing
station
coil
Prior art date
Application number
PCT/ES2006/000547
Other languages
English (en)
Spanish (es)
Other versions
WO2007039656A3 (fr
Inventor
Juan Davila Casitas
Original Assignee
Serviflex, Sl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Serviflex, Sl filed Critical Serviflex, Sl
Publication of WO2007039656A2 publication Critical patent/WO2007039656A2/fr
Publication of WO2007039656A3 publication Critical patent/WO2007039656A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F16/00—Transfer printing apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing
    • 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
    • B41M1/14—Multicolour printing
    • B41M1/18—Printing one ink over another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams

Definitions

  • the present invention concerns a system and method for printing substraters, in general laminar bands with thermal inks curable by thermal energy, in particular by electron beam radiation (EB beam electron).
  • Printing is preferably carried out with a flexographic machine, or with a series of successive printing stations, each of which has its own printing drum associated.
  • tack is defined in the printing industry as the force necessary to separate an ink film between two rollers, usually measured by a Thwing Albert ink meter.
  • inks for printing in low viscosity flexography which include a solvent that controls said viscosity and contributes to implementing the said wet trapping phenomenon.
  • these flexographic inks do not include (or include in minimum quantities) photoinitiators and have a water content of the order of 25 to 30%, which makes it possible to adequately evaporate between the successive stations of a multicolored flexographic machine, taking advantage of the phenomenon of "wet trapping" cited.
  • US-A-5407708 discloses a system and a method for printing substrates by means of radiation curable inks in a flexographic printing system, which combines a UV curing station prior to a final curing station by electronic beam radiation .
  • EB The application of this technology to the case of white would solve the inconvenience explained.
  • the invention provides a system and method for printing substrates with aqueous inks curable by electron beam radiation, which does not require one or more auxiliary curing stations of ultraviolet (UV), and which allows the white color to be printed.
  • UV ultraviolet
  • the invention also provides a system and method, whereby the cured inks are adhered to a first or a second substrate depending on the surface tension thereof, previously selected, whereby a copying (duplicate) of surface finishes such as different degrees of roughness from gloss to matt and micro relief.
  • dependent claims 2 to 14 details the implementation in a single central drum flexographic machine
  • dependent claim 12 details the implementation in the case of a distribution of stacked printing units, each unit having its own printing drum (structure "Stack").
  • Fig. 1 is a schematic diagram illustrating a system and method for printing substrates with aqueous inks curable by electron beam radiation in accordance with a first embodiment of the present invention, with details A, B, C, D, E and F expanded; Y
  • Fig. 2 is a schematic diagram illustrating a second embodiment of the present invention, with enlarged details A, B, C, D, E and F.
  • Fig. 1 shows the system for printing substrates with aqueous inks curable by electron beam radiation in accordance with a first embodiment of the system of the present invention, and from the description From it, the characteristics of a first example of the method implemented by it will become evident.
  • the system comprises a first coil 9 from which a first substrate 1 is unwound in the form of a continuous band that passes around a central printing drum 7.
  • a plurality of stations of print 3, 3a are arranged around said central print drum 7 to print successively and wet on wet several colors on said first substrate 1 using inks 8, aqueous, curable by electron beam radiation, while the first substrate 1 is dynamically supported on said central printing drum 7.
  • Each of these printing stations 3, 3a It generally comprises, and as is well known in the art, a printing roller 21 on which a cliché is mounted with the reasons to be printed arranged to rotate in contact with the first substrate 1 resting on the central printing drum 7, a ink roller 22 for smearing the printing roller 21 with ink and a scraper device 23 for applying ink to said ink roller 22.
  • each of the printing stations 3, 3a has associated an own printing drum, so that each printing station 3, 3a prints its corresponding color on the first substrate 1 while This is dynamically supported on said own printing drum, without this altering the essential characteristics of the present invention.
  • the first substrate 1 has a face to be printed having a first surface tension and comprising a surface finish 13 (see the enlarged detail A of Fig. 1).
  • This surface finish 13 may be selected, for example, between different degrees of roughness, from a very low degree of roughness to provide a glossy finish to a higher degree of roughness to provide a matte finish.
  • the surface finish 13 may include a micro relief to provide a hologram effect, or other effects.
  • a second substrate 2 is unwound which has a face having a second surface tension and a surface finish suitable as a support for the inks 8 (see the enlarged detail C of Ia Fig. 1).
  • This second substrate 2 is suitable to the requirements of the desired final product.
  • the first substrate 1 with the uncured inks 8 printed and this second substrate 2 meet at a roller pressure station 4 in which the second substrate 2 is attached and pressed on the uncured inks 8 printed on said first substrate 1.
  • the mentioned roller pressure station 4 comprises, for example, a pair of pressure rollers 14, 15 facing and pushed towards each other by means of pressure 16 capable of applying a controlled pressure.
  • Guiding means for example, rollers 19, are arranged to pass the first and second overlapping substrates 1, 2, and with the inks 8 between them, by the tightening of said pair of pressure rollers 14, 15. Obviously , if necessary, more than one pair of pressure rollers could be arranged consecutively to press the second substrate 2 against the uncured inks 8 printed on the first substrate 1.
  • a station is arranged curing 5.
  • rollers 20 constitute means for keeping the first and second substrates 1, 2 superimposed, with the inks 8 arranged between them, while passing in front of an electronic beam emitting apparatus 17 which is located in said station of curing 5.
  • said electronic beam emitter 17 radiates an electronic beam on the set of the first and second overlapping substrates 1, 2 and with the inks 8 between In order to effect the curing of the inks 8.
  • the first and second substrates 1, 2 are attached and the cured inks 8 are arranged between them (see the enlarged detail D of Fig. 1 ).
  • the system comprises a separation station 6 which serves to separate the second substrate 2 from the first substrate 1.
  • the second surface tension of the second substrate 2 is greater than the first surface tension of the first substrate 1, and this causes the cured inks 8 to adhere to the second substrate 2 while they come off the first substrate 1.
  • the inks 8 are transferred from the first substrate 1 to the second substrate 2, with the ink layers of different colors arranged in the reverse order of how they were initially printed on the first substrate 1.
  • the aforementioned surface finish 13 of the first substrate 1 is copied in negative to the cured inks 8 transferred to the second substrate 2 (see the enlarged detail E of Fig. 1).
  • the first substrate 1, free of inks is wound in a third coil 10 while, on the other hand, the second substrate 2 with the cured inks 8 adhered thereto ( detail E of Fig. 1) is wound in a fourth coil 12.
  • the substrate 1 rolled in the third coil 10 is substantially in the same initial state of the process, when it was unwound from the first coil 9 (detail A of Fig. 1). Therefore, an additional advantage of the system and of this example of embodiment of the method of the present invention is that the first coil 9 can be replaced by said third coil 10 in order to reuse the first substrate 1 for a new printing process and transfer of inks 8 from the first to the second substrate. Obviously, the number of times the first substrate can be reused is limited by its wear.
  • a white ink is applied first, which acts as an opaque white base on which the remaining colors are successively printed, which are more or less transparent, and each printed ink is dried before on it the printing of the following is carried out by means of drying units arranged between the different printing stations.
  • the aqueous inks 8 curable by electron beam radiation used in the system and method of the present invention have, for the different colors, a water content of 25% to 30%, and spontaneously dry enough to allow wet to wet printing process without the need to incorporate dryer units arranged between the different printing stations.
  • aqueous inks 8 curable by electron beam radiation the exception is white ink, which has a water content of only 5% to 10% and a solids content of 35% to 45%. For this reason, the aqueous ink curable by white electron beam radiation does not support printing wet on wet and not suitable for use opaque white base on which the remaining colors are printed successively.
  • the system and the method according to this first embodiment of the present invention provide a solution to this problem including a white printing station 3a in the last place of the printing stations 3, 3a around the central printing drum 7 to print a white ink in the last place, that is, above the inks of the other colors, before the first substrate 1 leaves the central printing drum 7 and enters the roller pressure station 4.
  • a white printing station 3a in the last place of the printing stations 3, 3a around the central printing drum 7 to print a white ink in the last place, that is, above the inks of the other colors, before the first substrate 1 leaves the central printing drum 7 and enters the roller pressure station 4.
  • Fig. 2 a second example of embodiment of the invention is illustrated, where the same numerical references as in Fig. 1 have been used to designate similar elements.
  • the system of Fig. 2 comprises, as in the first embodiment, printing stations 3, 3a arranged around a central printing drum 7, a roller pressure station 4, a curing station 5 and a separation station 6, which essentially respond to the description that has been made of them above in relation to Fig. 1.
  • a first substrate 1 in the form of a continuous band is unwound from a first coil 9 before entering the print stations 3, 3a.
  • This first substrate 1 comprises a face to be printed that has a first surface tension and a surface finish suitable as a support for the inks 8, and is suitable to the requirements of the desired final product (see the enlarged detail A of Fig. 2) . While the first substrate 1 passes around the central printing drum 7 the different printing stations 3, 3a successively print different colors on the same wet on wet using aqueous inks curable by electron beam radiation. To the leaving the printing stations 3, 3a, the inks 8 are adhered on the first substrate 1 (see the enlarged detail B of Fig. 2).
  • a second substrate 2 is unwound in the form of a continuous band comprising a face to be superimposed on the inks 8 printed on the first substrate 1.
  • This face has a second surface tension and a surface finish 18 which can comprise different degrees of roughness, from glossy to matte, or a micro relief capable of producing, for example, a hologram effect (see the enlarged detail C of Fig. 2).
  • the first substrate 1 with the inks 8 adhered thereto meets the second substrate 2 in the roller pressure station 4, both first and second substrates 1, 2 attached, and with the inks 8 arranged between them (see the enlarged detail D of Fig.
  • the first and second substrates 1, 2 are separated.
  • the first surface tension of the first substrate 1 is greater than the second surface tension of the second substrate 2.
  • the cured inks 8 remain adhered to the first substrate 1, and said surface finish 18 of the second substrate 2 is negatively copied to the cured inks 8 adhered to the first substrate 1 (see the enlarged detail F of Fig. 2), which is wound together with the inks 8 in a third coil 10 after leaving said separation station 6.
  • the second substrate 2 once separated, is free of inks (see the enlarged detail E of Fig. 2) and is wound in a fourth coil 12 after leaving the separation station 6.
  • the second substrate 2 when it is wound in the fourth coil 12 (detail E of Fig. 2) is substantially in it Initially, the second substrate 2 unwound from the second coil 11 (detail C of Fig. 2) at the beginning of the process. Therefore, the second coil 11 once empty can be replaced by the fourth coil 12 in order to reuse the second substrate 2, and so on as many times as the degree of wear of the second substrate 2 as advised.
  • FIG. 1 is to provide an opaque base layer by means of a white ink in a wet to wet printing process using aqueous inks curable by electron beam radiation.
  • FIG. 2 An application of the second embodiment (Fig. 2) is that of providing a final surface finish to aqueous inks curable by wet beam radiation printed wet on wet on a substrate.
  • the method of the first and second embodiments of the present invention has in common the following steps. First, successively print wet on wet, by means of a plurality of printing stations 3, 3a, various colors on a first substrate 1 with aqueous inks 8 curable by electron beam radiation, said first substrate 1 having a first surface tension.

Abstract

L'invention concerne un système d'impression de substrats avec des encres aqueuses durcissables au moyen d'un rayonnement de faisceau électronique qui comprend des stations d'impression (3, 3a) permettant d'imprimer par la technique humide sur humide différentes encres (8) sur un premier substrat (1) avec une première tension superficielle ; une station de pression par rouleaux (4) servant à adosser et comprimer un second substrat (2) avec une seconde tension superficielle sur la face imprimée du premier substrat (1) ; une station de durcissement (5) servant à irradier un faisceau électronique sur le premier et le second substrats (1, 2) superposés avec les encres (8) placées entre les substrats afin de faire durcir ces dernières ; et une station de séparation (6) servant à séparer le second substrat (2) du premier substrat (1). Les encres (8) durcies restent collées au premier substrat (1) ou au second substrat (2) en fonction d'une relation entre la première et la seconde tensions superficielles des premier et second substrats (1, 2).
PCT/ES2006/000547 2005-10-06 2006-09-29 Systeme et procede d'impression de substrats avec des encres aqueuses durcissables au moyen d'un rayonnement de faisceau electronique WO2007039656A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200502424A ES2277535B1 (es) 2005-10-06 2005-10-06 Sistema y metodo para impresion de substratos con tintas acuosas curables por radiacion de haz electronico.
ESP200502424 2005-10-06

Publications (2)

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WO2007039656A2 true WO2007039656A2 (fr) 2007-04-12
WO2007039656A3 WO2007039656A3 (fr) 2007-05-24

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ES (1) ES2277535B1 (fr)
WO (1) WO2007039656A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102744961A (zh) * 2012-04-01 2012-10-24 深圳劲嘉彩印集团股份有限公司 一种电子束印刷除氧设备及其除氧方法
CN108481897A (zh) * 2018-03-20 2018-09-04 广州通泽机械有限公司 一种层叠式柔版印刷机连线eb辐照即时固化型复合机
CN108481896A (zh) * 2018-03-20 2018-09-04 广州通泽机械有限公司 一种卫星式柔版印刷机连线eb辐照即时固化型复合机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573414A1 (fr) * 1989-06-27 1993-12-15 Poul Schack Petersen Procede et machine d'impression pour l'impression polychrome, realisee de preference sur du tissu.
US5690028A (en) * 1996-06-06 1997-11-25 Cavanagh Corporation Wet trapping method and apparatus for low viscosity radiation cured print
US6443058B1 (en) * 1999-03-19 2002-09-03 Heidelberger Druckmaschinen Ag Combined printing method and hybrid printing machine
US6772683B2 (en) * 2002-02-19 2004-08-10 Sun Chemical Corporation Method and apparatus for wet trapping with energy-curable flexographic liquid inks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573414A1 (fr) * 1989-06-27 1993-12-15 Poul Schack Petersen Procede et machine d'impression pour l'impression polychrome, realisee de preference sur du tissu.
US5690028A (en) * 1996-06-06 1997-11-25 Cavanagh Corporation Wet trapping method and apparatus for low viscosity radiation cured print
US6443058B1 (en) * 1999-03-19 2002-09-03 Heidelberger Druckmaschinen Ag Combined printing method and hybrid printing machine
US6772683B2 (en) * 2002-02-19 2004-08-10 Sun Chemical Corporation Method and apparatus for wet trapping with energy-curable flexographic liquid inks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102744961A (zh) * 2012-04-01 2012-10-24 深圳劲嘉彩印集团股份有限公司 一种电子束印刷除氧设备及其除氧方法
CN102744961B (zh) * 2012-04-01 2016-12-14 深圳劲嘉集团股份有限公司 一种电子束印刷除氧设备及其除氧方法
CN108481897A (zh) * 2018-03-20 2018-09-04 广州通泽机械有限公司 一种层叠式柔版印刷机连线eb辐照即时固化型复合机
CN108481896A (zh) * 2018-03-20 2018-09-04 广州通泽机械有限公司 一种卫星式柔版印刷机连线eb辐照即时固化型复合机

Also Published As

Publication number Publication date
ES2277535B1 (es) 2009-08-17
WO2007039656A3 (fr) 2007-05-24
ES2277535A1 (es) 2007-07-01

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