EP0993963A1 - Procédé d'impression en continu d'un film plastique, dispositif pour sa mise en oeuvre et film plastique imprimé obtenu par le procédé - Google Patents
Procédé d'impression en continu d'un film plastique, dispositif pour sa mise en oeuvre et film plastique imprimé obtenu par le procédé Download PDFInfo
- Publication number
- EP0993963A1 EP0993963A1 EP99402398A EP99402398A EP0993963A1 EP 0993963 A1 EP0993963 A1 EP 0993963A1 EP 99402398 A EP99402398 A EP 99402398A EP 99402398 A EP99402398 A EP 99402398A EP 0993963 A1 EP0993963 A1 EP 0993963A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plastic film
- strip
- printed
- printing
- film
- 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
- 239000002985 plastic film Substances 0.000 title claims abstract description 126
- 229920006255 plastic film Polymers 0.000 title claims abstract description 126
- 238000007639 printing Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 238000000859 sublimation Methods 0.000 claims abstract description 32
- 230000008022 sublimation Effects 0.000 claims abstract description 32
- 229920003023 plastic Polymers 0.000 claims abstract description 18
- 239000004033 plastic Substances 0.000 claims abstract description 18
- 238000012546 transfer Methods 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000007651 thermal printing Methods 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims description 33
- 238000001816 cooling Methods 0.000 claims description 10
- 239000012790 adhesive layer Substances 0.000 claims description 9
- 239000004952 Polyamide Substances 0.000 claims description 7
- 229920002647 polyamide Polymers 0.000 claims description 7
- 229920000728 polyester Polymers 0.000 claims description 6
- 239000002952 polymeric resin Substances 0.000 claims description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000000975 dye Substances 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 239000004793 Polystyrene Substances 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 238000003490 calendering Methods 0.000 claims description 3
- IVKVYYVDZLZGGY-UHFFFAOYSA-K chromium(3+);octadecanoate Chemical class [Cr+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O IVKVYYVDZLZGGY-UHFFFAOYSA-K 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- 244000144992 flock Species 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 2
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 3
- 230000001464 adherent effect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000003086 colorant Substances 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000003856 thermoforming Methods 0.000 description 17
- 239000000976 ink Substances 0.000 description 13
- 238000010023 transfer printing Methods 0.000 description 6
- 230000004927 fusion Effects 0.000 description 5
- 238000007650 screen-printing Methods 0.000 description 5
- 241001080024 Telles Species 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000007641 inkjet printing Methods 0.000 description 3
- 238000007645 offset printing Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 235000019646 color tone Nutrition 0.000 description 2
- 235000021183 entrée Nutrition 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 241001417494 Sciaenidae Species 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010017 direct printing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000008542 thermal sensitivity Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F16/00—Transfer printing apparatus
- B41F16/02—Transfer printing apparatus for textile material
-
- 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
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
- B41M5/035—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic
-
- 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
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
- B41M5/035—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic
- B41M5/0358—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic characterised by the mechanisms or artifacts to obtain the transfer, e.g. the heating means, the pressure means or the transport means
-
- 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
- B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
-
- 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
- B41M5/0041—Digital printing on surfaces other than ordinary paper
-
- 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
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0052—Digital printing on surfaces other than ordinary paper by thermal printing
Definitions
- the invention relates to a continuous printing process for a film. flat plastic, flocked or not, the device for its implementation and the film printed plastic obtained by this process.
- the invention also relates to a method for continuously printing a colored pattern or not on a flat plastic film, flocked or not, intended to be thermoformed into a specific non-planar surface, as well as the film printed plane plastic and the thermoformed plastic film obtained by this process.
- Sublimation transfer printing is already known as such and consists, firstly, in printing on a backing paper of patterns from inks made up of sublimable dyes which are suitable to vaporize from a certain temperature and come to settle permanently on synthetic materials, for example polyester or polyamide polymers, the process for printing backing paper which can be any, for example offset printing, heliographic or flexographic printing, or else a printing screen printing with flat or rotating frame.
- the patterns in sublimable dyes previously printed on the backing paper are transferred by sublimation, by putting in contact, under a regular pressure and temperature determined, usually using of a thermal calender, the paper pre-printed with the textile support to print, usually for a period of 5 to 40 seconds.
- the grille thermal may include, in the case of printing in formats, a heating press with horizontal plates, or in the case of printing continuously from rolls of printed paper and synthetic material to print, a rotary heating cylinder associated with a conveyor belt under voltage.
- This sublimation transfer printing process can be used to print certain plastics, provided you apply beforehand a layer of varnish on the plastic to be printed, or pre-process the pre-printed printing paper so that it make it non-stick.
- This printing method is used in particular for printing injected or formed plastic parts, such as bottles, skis, pens, helmets, and in this case, the impression is made by means of a heating tool conforming to the shape of the part plastic to print.
- Another method of direct printing of plastic films is to use known methods of the flexographic or screen printing type, but in this case, the ink does not get into the plastic, so that the printed patterns have low resistance to scratching and friction. In addition, these printing methods do not allow obtain the finest graphic effects, for example prints in four-color photographic type.
- Yet another known method for printing plastic films consists of fusing a plastic film on the printing surface previously printed support, for example a printed polyester film in heliography, then hot laminated on the plastic film leaving the extruder.
- the plastic films to be printed are intended to be thermoformed, for example to form protective shims, parts for the automotive industry, packaging elements and packaging
- the patterns printed on the flat plastic film undergo the deformation of the plastic film in an uneven surface, causing a modification of the contours and configuration of the printed pattern, as well than a variation in color tones, due to the stretching of the film plastic during its thermoforming.
- the reason which must appear on the thermoformed non-planar surface is a geometric design, letters or of figures, distortions of the pattern may become unacceptable.
- the primary object of the invention is to propose a printing method using continuous of a plastic film, flocked or not, by a printing process with sublimation transfer, while having quality, finesse and high printing clarity, for example of the four-color type, and avoiding any sticking between the plastic film as well with the conveyor belt than with preprinted printing paper.
- a second object of the invention is to propose a printing process a pattern on a flat plastic film, flocked or not, intended to be thermoformed into a specific non-planar surface, which allows compensate for the deformations of the pattern and / or the variations in color of the color on the non-planar thermoformed surface.
- the temperature for fusing the plastic film to the temporary support is between 100 and 200 ° C, preferably between 170 and 180 ° C.
- the temperature for sublimation transfer can be between 170 and 230 ° C.
- the temperature at which the entire film printed plastic and temporary support is cooled may be around from 20 to 30 ° C.
- the method of the invention consists, for a unflocked plastic film, to preprint the printing paper with a ink containing sublimable dyes, with a low content of softening or non-sticking agents, to avoid sticking between the film plastic and printing paper, during the transfer printing step by sublimation.
- These agents can be chosen from silicones, organic fatty acids and chromium stearates.
- the method consists in preparing a flocked plastic film, by applying an adhesive layer to the front of the plastic film and by flocking white fibers on said adhesive layer.
- the adhesive layer is a polymer resin in aqueous emulsion or in organic solution
- the flocks are preferably fibers of polyamide or polyester, with a length between 0.3 and 3.0 mm and a titer between 0.5 and 20 Dtex (0.5 and 20.10 -7 Kg.m -1) .
- the plastic film can be a calendered, extruded or co-extruded film, chosen among the polymeric resins based on polyvinyl chloride, polystyrene, polypropylene, acrylic butadiene-styrene (ABS), polyurethane, polyester, polycarbonate, polyamide or any mixture of these.
- ABS acrylic butadiene-styrene
- Printing paper can be printed by offset printing, flexographic, heliographic, screen printing, or inkjet.
- the cooling station comprises two cylinders with double envelope, each cylinder comprising an agent circulation refrigerant, for example water, in the jacket, so that said printed composite strip comes into contact with the first cylinder by its provisional support strip, then with the second cylinder by its printed plastic film strip.
- agent circulation refrigerant for example water
- Another subject of the invention is a printed plastic film strip, characterized in that it is directly obtained by the above process.
- the method consists in determining, for each zone elementary of the film, the color tint of the part of the deformed pattern, in depending on the desired color shade of the final pattern and the rate of local stretching of the film by which we pass from the part of the deformed pattern to the final pattern part.
- the method consists in printing simultaneously on the portion of the flat film other than that to be thermoformed, a marker to precisely locate the portion to be thermoformed of the film flat plastic.
- Said mark to be printed may include a line extending along an edge of the flat plastic film and a line extending transversely from this line.
- the method of the invention consists, for a unflocked plastic film, to preprint the printing paper with a ink containing sublimable dyes, with a low content of softening or non-sticking agents, to avoid sticking between the film plastic and printing paper, during the transfer printing step by sublimation.
- These agents can be chosen from silicones, organic fatty acids and chromium stearates.
- the method consists in preparing a flocked plastic film, by applying an adhesive layer to the front of the plastic film and by flocking white fibers on said adhesive layer.
- the adhesive layer is a polymer resin in aqueous emulsion or in organic solution
- the flocks are preferably fibers of polyamide or polyester, with a length between 0.3 and 3.0 mm and a titer between 0.5 and 20 Dtex (0.5 and 20.10 -7 Kg. M - 1) .
- the plastic film can be a calendered, extruded or co-extruded film, chosen among the polymeric resins based on polyvinyl chloride, polystyrene, polypropylene, acrylic butadiene-styrene (ABS), polyurethane, polyester, polycarbonate, polyamide or any mixture of these.
- ABS acrylic butadiene-styrene
- Printing paper can be printed by offset printing, flexographic, heliographic, screen printing, or inkjet.
- the method of the invention consists in positioning laterally and transversely the portion of surface to be thermoformed flat plastic film on the surface of which the deformed pattern is printed, in vis-à-vis the shape of the thermoforming tool, by means of the mark aforementioned print, and to be thermoformed with said thermoforming tool only said portion in a non-planar surface on which the desired final pattern.
- the method consists in detecting optically the longitudinal line of the reference to laterally guide the flat plastic film and the transverse line of the marker to stop, in the longitudinal direction, the flat plastic film with its portion at thermoform in front of the shape of the thermoforming tool.
- the method consists in calculating the parts of distorted pattern by computer and to pre-print the printing paper by a machine inkjet printing controlled by said computer.
- Inkjet printing enables digital printing under optimal conditions, since it is not necessary to make specific printing tools, such as cylinders, plates offset, screen printing, and where inkjet printing can be directly controlled by the computer equipped with the software for calculating distortions of the pattern.
- the invention also relates to the printed plastic film with a non-planar surface. thermoformed, characterized in that it is directly obtained by the process cited above.
- This device comprises an unwinding station 1 which supports a spool 2 from which a strip is unwound temporary support 3, for example made of paper, and above the reel 2, a reel 17 from which a strip of plastic film is unwound 4, flocked or not.
- the temporary support is made of a material that is not very sensitive to heat, in order to ensure dimensional stability to the plastic film, when of the subsequent sublimation operation, this material having a non-stick feature at room temperature, to facilitate detachment of the plastic film after thermal printing, as well as ability to adhere hot with the plastic film when the latter undergoes a fusion, during the heating and transfer operations by sublimation later.
- the aforementioned strips 3 and 4 then pass through a heating station 5 which has three guide rollers 6, arranged upstream of a drum rotary heater 7, which is rotated clockwise indicated by arrow F in Figure 1.
- bands 3 and 4 pass under a first roll 6, the front of the plastic film strip 4 coming in contact with the roller 6 and the temporary support strip 3 coming in contact with the back of said strip 4. All of strips 3 and 4 as well superimposed is conveyed horizontally to a second roller 6 against which the front of the plastic film strip 4 is always supported, said strips 3 and 4 making a 90 ° turn upwards around this second roller 6. Then, the superimposed strips 3 and 4 carry out a 180 ° turn around the third roller 6 which is located near the heating drum 7, so that the temporary support strip 3 comes in contact with the heating cylinder 7, to avoid sticking by softening of the plastic film on the heating drum 7.
- the assembly strips 3 and 4 wrap around the heating drum 7, at an angle about 270 °, so that the plastic film strip 4 is brought to a temperature of around 200 ° C when the unit leaves the drum heating 7.
- the strip of plastic film adheres, due to its fusion, to the temporary support strip 3 which ensures dimensional support to said strip of plastic film 4, the assembly thus forming a composite strip 18 whose two layers are temporarily glued together.
- Said composite strip 18 is conveyed horizontally downstream of the heating drum 7 to a thermal printing machine 8.
- This thermal printing machine 8 has a roll of guide 9 against which the temporary support of the strip bears composite.
- the composite belt is conveyed by a conveyor belt 10 around a rotary heating grille 11 which is driven in counterclockwise rotation in Figure 1.
- the conveyor belt 10 is consisting of an endless band which rolls around a plurality of rollers 12, some of these rollers being movable to adjust the tension of the belt 10 and therefore the pressure exerted by the belt 10 against the grille heating 11.
- the composite belt comes into contact with the conveyor belt 10 by its temporary support, to avoid any sticking between the plastic film and the carpet.
- the machine 8 also comprises at least one coil 13, for example two spools, from which a strip 14 of pre-printed paper is unwound with a pattern made of sublimable ink.
- the band of pre-printed paper 14 is guided by a roller 15 upstream of the belt 10 and the heating grille 11.
- the machine 8 has two other coils 16 arranged downstream of the heating calender 11 and the belt conveyor 10, on which reels 16 is wound the paper 14, after the sublimation transfer of ink onto the plastic film of the strip composite.
- Pre-printed paper 14 is sandwiched between the calender heater 11 and the front of the plastic film of the composite strip which is pressurized by the conveyor belt 10 against the calender heating 11.
- the pattern consisting of sublimable ink is pre-printed on the side of the paper 14 which is intended to come into contact with the front of the plastic film of the composite strip, to allow transfer by sublimation.
- the sublimation transfer takes place around of the heating grille 11, over an angular travel of approximately 300 °, at a temperature between 180 and 230 ° C, under regular pressure generally less than 40 kPa exerted by the conveyor belt 10, and for an approximate duration of 5 to 40 s.
- the sublimable ink of the paper pre-printed 14 contains softening or non-sticking agents, for avoid sticking of the pre-printed paper 14 on the plastic film.
- the plastic film has a flocked surface intended for be printed, there is no need to provide such agents.
- the structure of the printing machine 8 will not be described further in detail, because it is known per se.
- each cylinder 21 or 22 has a double envelope on its side wall, to circulate inside this double wraps water, for example at 10 ° C, to cool the strip printed composite 19, up to a temperature generally understood between 20 and 30 ° C.
- the composite strip passes first around the upper cylinder 21, in coming into contact through its temporary support, in order to avoid sticking of the film plastic printed against this cylinder. Then, the composite strip already cooled passes around the lower cylinder 22, on the side of its plastic film printed, which no longer risks sticking to cylinder 22.
- the path of the strip composite around the two cylinders 21 and 22 has a configuration substantially S-shaped. At the outlet of the cooling station 20, the plastic film previously printed no longer adheres to the strip of temporary support, due to the non-stick properties of this last.
- the two overlapping bands pass through a station winding 23 which has a coil 24 around which is wrapped the printed plastic film strip 104 and a spool 25 around from which the provisional support strip is wound 3.
- the two superimposed strips 3 and 104 pass between two rollers 27 downstream of which the two strips are separated in direction of their respective coil. Coils 24 and 25 and rollers 27 are rotated.
- the provisional support strip 3 is first unrolled from the coil 2 all the way inside the device to the coil winding 25, over a total length of about 20 to 30 meters. Then, the strip of plastic film 4 is unwound from the reel 17, on a length of about 2 to 3 meters to the heating drum 7, because from from this location the plastic film strip 4 adheres to the support strip temporary 3, which allows its training through the entire device.
- the temporary support strip 3 which is wound on the reel 25, can be reused for the subsequent printing of a new plastic film strip.
- a checkerboard pattern 30 is pre-printed on the strip of printing paper 14, the checkerboard pattern 30 comprising in its square central an equilateral triangle whose vertex is directed to the left.
- Sure this strip of printing paper 14, is also printed a mark consisting of a longitudinal line 31 and a transverse line 32, for locate the pre-printed pattern 30 on said strip 14.
- thermoforming 50 comprising a spherical cavity 51 and holes 52 connected to an external suction system, which allows the film to be pressed plastic 104 softened by heating on the walls of the tool 50 this tool thermoforming being known per se, we have not represented the punch heating, the shape of which can be combined with the cavity 51.
- One portion plane of the plastic film strip 104 is heated, then thermoformed into a spherical non-planar surface 114 by the thermoforming tool 50, this distortion causing the checkerboard pattern 131 to stretch, as visible in Figure 5.
- the transformation has been indicated in FIG. 4 by dashed arrows of several elementary zones 130a to 130d of the flat plastic film in deformed elementary areas 131a to 131d on the spherical surface thermoformed 114.
- the set of elementary deformed zones forms thus the deformed pattern 131 visible in FIG. 5.
- thermoformed portion of the plastic film we determine, by reverse transformation, by anamorphosis, the preformed pattern 40 which is pre-printed upside down on a portion 114 of the printing paper 14, this portion 114 corresponding to the portion intended to be thermoformed, as shown in figure 6.
- This deformation is calculated by computer using suitable software.
- the plastic film strip 104 is printed with the preformed pattern 140 by not sublimation transfer of the preformed pattern 40 from the printing paper 14 as visible in FIG. 7.
- each elementary zone 140a to 140d of the flat portion of the plastic film is transformed into an elementary zone 141a to 141d on the surface not plane 114 obtained by thermoforming, as indicated by the arrows in dashed in Figure 8.
- thermoforming step of the printed plastic film strip 104 said strip is routed sequentially over the cavity of thermoforming 51, so as to precisely position the portion to thermoform 114 above said cavity 51. Precise positioning of the portion 114 is obtained by optical reading of the longitudinal position and transverse of this portion 14, using the references 31 and 32 above.
- the deformation by thermoforming of the portion 114 is also accompanied by a variation color tones depending on the local stretching rate of the film plastic, which also requires pre-compensating for these variations in color, when preprinting the printing paper 14.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Printing Methods (AREA)
- Decoration By Transfer Pictures (AREA)
- Laminated Bodies (AREA)
- Coloring (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
Description
- les films plastiques, et plus particulièrement les films extrudés, présentent des défauts de planéité, ce qui rend difficile leur impression en continu, à partir d'un rouleau de film plastique,
- les films plastiques, et plus particulièrement les films plastiques destinés à être thermoformés, tels que les films en polychlorure de vinyle (PVC) ou en polystyrène, présentent une sensibilité thermique telle qu'ils fondent et perdent ainsi toute cohésion, lorsqu'ils sont soumis à une impression par transfert par sublimation à une température voisine de 200° C, ce qui provoque une fluctuation dimensionnelle anarchique du film plastique lors de l'impression alors que le papier d'impression pré-imprimé ne subit aucune déformation, provoquant ainsi une impression floue et irrégulière,
- la fusion du film plastique lors de l'impression provoque également le collage du film plastique sur le tapis convoyeur de la machine d'impression,
- la fusion du film plastique non flocké conduit également au collage du film plastique au papier d'impression pré-imprimé.
- appliquer sur le verso du film plastique un support provisoire anti-adhérent, par exemple en papier,
- chauffer l'ensemble du film plastique et du support provisoire à une température telle que le film plastique atteigne son point de ramollissement pour coller temporairement au support provisoire, de façon que ce dernier assure le maintien dimensionnel du film plastique lors de l'étape d'impression thermique successive,
- transférer par sublimation un motif constitué d'une encre sublimable préimprimée sur un papier d'impression, par contact sous une pression et une température déterminées avec le recto du film plastique thermocollé au support provisoire,
- refroidir l'ensemble du film plastique ainsi imprimé et du support provisoire à une température permettant le décollement du support provisoire.
- une station de déroulement, comportant une bobine pour une bande de film plastique, flocké ou non, et une bobine pour une bande de support provisoire,
- une station de chauffage à l'entrée de laquelle la bande de support provisoire est appliquée contre le verso de la bande de film plastique, l'ensemble constitué par lesdites bandes superposées venant en contact par la bande de support provisoire contre un tambour chauffant entraíné en rotation, afin de délivrer en sortie une bande composite constituée du film plastique thermocollé au support provisoire,
- une machine de thermo-impression, comportant un tapis convoyeur sous tension qui vient en contact avec le support provisoire de ladite bande composite, une calandre chauffante entraínée en rotation, et au moins une bobine pour une bande de papier pré-imprimé d'un motif constitué d'une encre sublimable, ladite bande de papier pré-imprimé étant appliquée sur le recto du film plastique de ladite bande composite, en amont de la calandre chauffante, de façon que le tapis convoyeur puisse plaquer sous une pression déterminée ladite bande composite recouverte du papier pré-imprimé contre la calandre chauffante, pour transférer par sublimation l'encre sublimable sur le recto du film plastique, le papier d'impression étant séparé de la bande composite imprimée en aval de la calandre chauffante,
- une station de refroidissement pour refroidir la bande composite imprimée à une température telle que la bande de support provisoire puisse être décollée de la bande de film plastique imprimée,
- une station d'enroulement à l'entrée de laquelle la bande de support provisoire est décollée de la bande de film plastique imprimée, chaque bande étant enroulée sur une bobine respective qui est entraínée en rotation.
- diviser géométriquement en zones élémentaires la portion du film plastique plan à thermoformer,
- déterminer, pour chaque zone élémentaire du film, le taux d'étirement local du film lors de son thermoformage en la surface non plane,
- déterminer, pour chaque zone élémentaire du film, la partie de motif déformé à imprimer sur la surface du film plastique plan, cette partie de motif déformé étant définie par transformation par anamorphose du motif final devant figurer sur la surface non plane thermoformée, en tenant compte du taux d'étirement local du film plastique par lequel on passe de la partie de motif déformé à la partie de motif final,
- imprimer, sur la surface de la portion à thermoformer du film plastique plan, le motif déformé défini par l'ensemble des parties de motif déformé déterminées à l'étape précédente.
- appliquer sur le verso du film plastique plan un support provisoire anti-adhérent,
- chauffer l'ensemble du film plastique plan et du support provisoire à une température telle que le film plastique atteigne son point de ramollissement pour coller temporairement au support provisoire, de façon que ce dernier assure le maintien dimensionnel du film plastique lors de l'étape d'impression thermique successive,
- transférer par sublimation le motif déformé pré-imprimé à l'envers avec une encre sublimable sur un papier d'impression, par mise en contact sous une pression et une température déterminées dudit papier d'impression avec le recto du film plastique thermocollé au support provisoire,
- refroidir l'ensemble du film plastique plan ainsi imprimé et le support provisoire à une température permettant le décollement du support provisoire.
- la figure 1 est une vue schématique en élévation d'un exemple de réalisation du dispositif de mise en oeuvre du procédé d'impression en continu, conformément au premier objet de l'invention ;
- la figure 2 est une vue partielle et en plan d'une bande de papier pré-imprimé avec un motif à l'envers, colorée ou non, constituée d'une encre sublimable, destinée à être utilisée dans le procédé conforme au premier objet de l'invention ;
- la figure 3 est une vue partielle et en plan d'une bande de film plastique imprimée par transfert par sublimation à partir de la bande de papier préimprimée de la figure 2 ;
- la figure 4 est une vue en coupe transversale suivant la ligne IV de la figure 5, représentant le thermoformage de la bande de film plastique imprimée de la figure 3 dans un outil de thermoformage à cavité sphérique ;
- la figure 5 est une vue partielle et de dessus suivant la flèche V de la figure 4, représentant la bande de film plastique thermoformée avec un motif déformé sur sa surface sphérique ;
- les figures 6 et 7 sont des vues analogues aux figures 2 et 3 respectivement, mais avec un motif prédéformé en vue du thermoformage, conformément au deuxième objet de l'invention ; et
- les figures 8 et 9 sont des vues analogues aux figures 4 et 5 respectivement, avec un motif non déformé sur la bande de film plastique thermoformée.
Claims (12)
- Procédé d'impression en continu d'un film plastique (4), flocké ou non, caractérisé en ce qu'il consiste à :appliquer sur le verso du film plastique (4) un support provisoire (3) anti-adhérent, par exemple en papier,chauffer l'ensemble du film plastique et du support provisoire à une température telle que le film plastique atteigne son point de ramollissement pour coller temporairement au support provisoire, de façon que ce dernier assure le maintien dimensionnel du film plastique lors de l'étape d'impression thermique successive,transférer par sublimation un motif (30, 40) constitué d'une encre sublimable préimprimée sur un papier d'impression (14), par contact sous une pression et une température déterminées avec le recto du film plastique (4) thermocollé au support provisoire (3),refroidir l'ensemble du film plastique ainsi imprimé (104) et du support provisoire (3) à une température permettant le décollement du support provisoire.
- Procédé selon la revendication 1, caractérisé en ce que la température pour thermocoller le film plastique (4) au support provisoire (3) est comprise entre 100 et 200° C, de préférence entre 170 et 180° C.
- Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la température pour le transfert par sublimation est comprise entre 170 et 230° C.
- Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la température à laquelle l'ensemble du film plastique imprimé (104) et du support provisoire (3) est refroidi est de l'ordre de 20 à 30° C.
- Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'il consiste, pour un film plastique non flocké, à préimprimer le papier d'impression (14) avec une encre contenant des colorants sublimables, et une faible teneur en agents adoucissants ou anti-adhérents, pour éviter le collage entre le film plastique (4) et le papier d'impression (14), lors de l'étape d'impression par transfert par sublimation.
- Procédé selon la revendication 5, caractérisé en ce que les agents peuvent être choisis parmi les silicones, les acides gras organiques et les stéarates de chrome.
- Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'il consiste à préparer un film plastique flocké, en appliquant sur le recto du film plastique (4) une couche adhésive et en flockant des fibres de couleur blanche sur ladite couche adhésive.
- Procédé selon la revendication 7, caractérisé en ce que la couche adhésive est une résine polymère en émulsion aqueuse ou en solution organique, et les flocks sont de préférence des fibres en polyamide ou en polyester, avec une longueur comprise entre 0,3 et 3,0 mm et un titre compris entre 0,5 et 20 Dtex (0,5 et 20.10-7 Kg.m-1).
- Procédé selon l'une des revendications 1 à 8, caractérisé en ce que le film plastique (4) est un film calandré, extrudé ou co-extrudé, choisi parmi les résines polymères à base de polychlorure de vinyle, de polystyrène, de polypropylène, d'acrylique butadiène-styrène (ABS), de polyuréthanne, de polyester, de polycarbonate, de polyamide ou de tout mélange de ces derniers.
- Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 9, caractérisé en ce qu'il comporte :une station de déroulement (1), comportant une bobine (17) pour une bande de film plastique (4), flocké ou non, et une bobine (2) pour une bande de support provisoire (3),une station de chauffage (5) à l'entrée de laquelle la bande de support provisoire (3) est appliquée contre le verso de la bande de film plastique (4), l'ensemble constitué par lesdites bandes superposées venant en contact par la bande de support provisoire contre un tambour chauffant (7) entraíné en rotation, afin de délivrer en sortie une bande composite (18) constituée du film plastique thermocollé au support provisoire,une machine de thermo-impression (8), comportant un tapis convoyeur (10) sous tension qui vient en contact avec le support provisoire (3) de ladite bande composite (18), une calandre chauffante (11) entraínée en rotation, et au moins une bobine (13) pour une bande de papier (14) pré-imprimé d'un motif (30, 40) constitué d'une encre sublimable, ladite bande de papier pré-imprimé étant appliquée sur le recto du film plastique (4) de ladite bande composite (18), en amont de la calandre chauffante, de façon que le tapis convoyeur puisse plaquer sous une pression déterminée ladite bande composite recouverte du papier pré-imprimé contre la calandre chauffante, pour transférer par sublimation l'encre sublimable sur le recto du film plastique, le papier d'impression étant séparé de la bande composite imprimée (19) en aval de la calandre chauffante,une station de refroidissement (20) pour refroidir la bande composite imprimée (19) à une température telle que la bande de support provisoire (3) puisse être décollée de la bande de film plastique imprimée (104),une station d'enroulement (23) à l'entrée de laquelle la bande de support provisoire (3) est décollée de la bande de film plastique imprimée (104), chaque bande étant enroulée sur une bobine respective (24, 25) qui est entraínée en rotation.
- Dispositif selon la revendication 10, caractérisé en ce que la station de refroidissement (20) comporte deux cylindres (21, 22) à double enveloppe, chaque cylindre comportant une circulation d'un agent réfrigérant, par exemple de l'eau, dans la double enveloppe, de façon que ladite bande composite imprimée (19) vienne en contact avec le premier cylindre (21) par sa bande de support provisoire (3), puis avec le deuxième cylindre (22) par sa bande de film plastique imprimée (104).
- Bande de film plastique imprimée (104), caractérisée en ce qu'elle est directement obtenue par le procédé selon l'une des revendications 1 à 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9812862A FR2784618B1 (fr) | 1998-10-14 | 1998-10-14 | Procede d'impression en continu d'un film plastique, dispositif pour sa mise en oeuvre et film plastique imprime obtenu par le procede |
| FR9812862 | 1998-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0993963A1 true EP0993963A1 (fr) | 2000-04-19 |
| EP0993963B1 EP0993963B1 (fr) | 2003-03-26 |
Family
ID=9531540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99402398A Expired - Lifetime EP0993963B1 (fr) | 1998-10-14 | 1999-09-30 | Procédé d'impression en continu d'un film plastique, dispositif pour sa mise en oeuvre et film plastique imprimé obtenu par le procédé |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6249297B1 (fr) |
| EP (1) | EP0993963B1 (fr) |
| AT (1) | ATE235377T1 (fr) |
| DE (1) | DE69906212T2 (fr) |
| ES (1) | ES2194424T3 (fr) |
| FR (1) | FR2784618B1 (fr) |
| PT (1) | PT993963E (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1625895A2 (fr) | 2004-08-04 | 2006-02-15 | Société d'Enduction et de Flockage | Procédé de fabrication en continu d'un support flocké et coloré |
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| US6596116B2 (en) * | 2000-08-23 | 2003-07-22 | Joseph Macedo | Methods for applying decorative designs to a continuous laminate |
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| US6998005B2 (en) * | 2001-03-29 | 2006-02-14 | Fresco Plastics Llc | Method and apparatus for forming dye sublimation images in solid plastic |
| US8308891B2 (en) | 2001-03-29 | 2012-11-13 | Fresco Technologies, Inc. | Method for forming dye sublimation images in solid substrates |
| US6977023B2 (en) | 2001-10-05 | 2005-12-20 | High Voltage Graphics, Inc. | Screen printed resin film applique or transfer made from liquid plastic dispersion |
| US6951594B2 (en) * | 2002-06-27 | 2005-10-04 | Tweel Home Furnishings, Inc. | Printed oven mitt and method for making same |
| WO2004005415A2 (fr) * | 2002-07-03 | 2004-01-15 | High Voltage Graphics, Inc. | Modele ou transfert etirable floque |
| WO2004005600A2 (fr) * | 2002-07-03 | 2004-01-15 | High Voltage Graphics, Inc. | Articles floques et procedes de fabrication de ceux-ci |
| AU2003251790A1 (en) * | 2002-07-03 | 2004-01-23 | High Voltage Graphics, Inc. | Process for printing and molding a flocked article |
| FR2862567B1 (fr) * | 2003-06-24 | 2006-02-17 | Bernard Claveau | Procede et dispositif de marquage par sublimation d'objets allonges |
| US7465485B2 (en) | 2003-12-23 | 2008-12-16 | High Voltage Graphics, Inc. | Process for dimensionalizing flocked articles or wear, wash and abrasion resistant flocked articles |
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| FR2881986B1 (fr) * | 2005-02-14 | 2008-07-11 | Plastic Bm Sarl | Procede d'impression de produits en matiere plastique par transfert sublimation |
| WO2006116706A2 (fr) * | 2005-04-28 | 2006-11-02 | High Voltage Graphics, Inc. | Article adhesif multicolore floque a floc lustre lumineux et procedes pour le fabriquer |
| WO2007018483A1 (fr) * | 2005-07-05 | 2007-02-15 | Aprentado, Ana, K | Methode pour creer un pot de fleur decoratif |
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| WO2007035809A2 (fr) * | 2005-09-20 | 2007-03-29 | High Voltage Graphics, Inc. | Articles elastomeres floques |
| US20070110949A1 (en) * | 2005-11-17 | 2007-05-17 | High Voltage Graphics, Inc. | Flocked adhesive article |
| US20070148397A1 (en) * | 2005-12-07 | 2007-06-28 | High Voltage Graphics, Inc. | Flocked multi-colored adhesive article with bright lustered flock |
| WO2008101115A1 (fr) | 2007-02-14 | 2008-08-21 | High Voltage Graphics, Inc. | Textile imprime par colorant de sublimation |
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| US20130288018A1 (en) * | 2012-04-30 | 2013-10-31 | Patrick W. Moller | System and method for printing on plastic and forming the printed plastic |
| JP2016502470A (ja) | 2012-10-12 | 2016-01-28 | ハイ ボルテイジ グラフィックス インコーポレイテッドHigh Voltage Graphics,Inc. | 熱融着可能な可撓性の装飾品およびそれを製造する方法 |
| US10011120B2 (en) | 2013-07-25 | 2018-07-03 | The Hillman Group, Inc. | Single heating platen double-sided sublimation printing process and apparatus |
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| US9731534B2 (en) | 2013-07-25 | 2017-08-15 | The Hillman Group, Inc. | Automated simultaneous multiple article sublimation printing process and apparatus |
| US9403394B2 (en) | 2013-07-25 | 2016-08-02 | The Hillman Group, Inc. | Modular sublimation transfer printing apparatus |
| WO2015108404A1 (fr) * | 2014-01-16 | 2015-07-23 | Mizrahi Aksiote Mario Moiz | Procédé de fabrication d'éléments imprimés pour des façades d'architecturales et appareils de ligne blanche et produits obtenus |
| CA2937931A1 (fr) | 2015-08-05 | 2017-02-05 | The Hillman Group, Inc. | Appareil d'impression par sublimation semi-automatisee |
| US10160244B1 (en) * | 2017-04-13 | 2018-12-25 | John Garrett Whitt | Method for dye-sublimation printing an orthotic substrate and orthotic product made thereby |
| JP7170201B2 (ja) * | 2018-11-30 | 2022-11-14 | 華衫環保紡織股▲フン▼有限公司 | 縦糸トランスプリント装置 |
| WO2025075530A2 (fr) * | 2023-10-03 | 2025-04-10 | Ильдус Ильдарович МУФАЗАЛОВ | Procédé d'application d'image sur du pet |
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- 1999-09-30 DE DE69906212T patent/DE69906212T2/de not_active Expired - Lifetime
- 1999-09-30 EP EP99402398A patent/EP0993963B1/fr not_active Expired - Lifetime
- 1999-09-30 AT AT99402398T patent/ATE235377T1/de not_active IP Right Cessation
- 1999-09-30 PT PT99402398T patent/PT993963E/pt unknown
- 1999-09-30 ES ES99402398T patent/ES2194424T3/es not_active Expired - Lifetime
- 1999-10-14 US US09/418,987 patent/US6249297B1/en not_active Expired - Fee Related
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| EP0097528A2 (fr) * | 1982-06-21 | 1984-01-04 | Hlh Corporation | Absorption d'images de colorants dans les matières plastiques |
| WO1993022072A1 (fr) * | 1992-04-24 | 1993-11-11 | Erich Killar | Procede d'enduction ou d'impression d'une feuille de matiere plastique avec des produits d'enduction hydrates, des produits d'enduction contenant des solvants ou des melanges de ces produits, des peintures ou des encres durcissant aux uv, ainsi qu'avec des pates de pvc |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1625895A2 (fr) | 2004-08-04 | 2006-02-15 | Société d'Enduction et de Flockage | Procédé de fabrication en continu d'un support flocké et coloré |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE235377T1 (de) | 2003-04-15 |
| FR2784618A1 (fr) | 2000-04-21 |
| ES2194424T3 (es) | 2003-11-16 |
| DE69906212T2 (de) | 2004-02-05 |
| DE69906212D1 (de) | 2003-04-30 |
| US6249297B1 (en) | 2001-06-19 |
| PT993963E (pt) | 2003-06-30 |
| EP0993963B1 (fr) | 2003-03-26 |
| FR2784618B1 (fr) | 2000-11-24 |
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