EP1625895A2 - Process for continuously manufacturing a colored flocked support - Google Patents

Abstract

A flocked and dyed cloth backing (S) is made by application (1) of polymerizable resin (RP) layer to surface of cloth backing; projection (2) of white or unbleached polyester flock fibers (FF) onto resin layer; polymerization (3) of resin to fix the flock fibers on cloth backing; deposition (4) of sublimable dye (E) on flocked surface; and sublimation (4) of deposited dye to dye the flocked fibers. The continuous manufacture of flocked and dyed cloth backing involves successive stages of application of polymerizable resin layer to surface of the cloth backing; projection of white or unbleached polyester flock fibers onto the resin layer; polymerization of the resin to fix the flock fibers on the cloth backing; deposition of sublimable dye on the flocked surface of the cloth backing; and sublimation of the deposited dye to dye the flocked fibers. During projection, polyester super microfibers are used with a titer of less than 0.5 Dtex and a length of 0.2-0.5 mm.

Description

The present invention relates to a continuous manufacturing process of a flocked and colored sheet support.

• pour le fabricant des flocks, des fabrications en quantités moyennes de quelques milliers de mètres de produits flockés dans une teinte uniforme donnée font appel à quelques centaines de kilogrammes de fibres "flocks", qui sont teintes dans le coloris donné voulu (environ 200Kg de fibres "flocks" pour 2000m² de produit flocké fabriqué) ; la teinture et la finition d'une telle quantité de fibres textiles conduit à des rejets importants de colorants et d'agents de finition textile, qui imposent eux-mêmes des opérations onéreuses de traitement des eaux usées, ainsi qu'à des opérations fréquentes de vidange et de nettoyage des matériels de fabrication et de teinture ;
• chez l'applicateur industriel de fibres "flocks", ces mêmes fabrications en quantités moyennes entraînent des temps morts importants dans la production en conséquence des opérations de nettoyage des machines qui sont indispensables entre chaque changement de coloris ; à titre d'exemple, une fabrication de 2000m² de produit flocké, dans un coloris donné, peut occuper un temps de production de 3 à 4 heures et un temps de préparation et de nettoyage de la machine pouvant atteindre la moitié de la durée de production; des fabrications segmentées augmentent par ailleurs les pertes systématiques engendrées par le processus de fabrication.

Obtaining monochrome flocked surfaces having a given color is well known and controlled. Flock fibers are prepared by their manufacturer and dyed in the desired shade by conventional textile dyeing processes. These dyed fibers are then applied by the conventional method of "flocking" and fixed on a support by implantation in a layer of polymer resin. The final shade of the flocked product is then obtained by the combination of the initial color of the flock fibers, the density of these fibers applied to the support and the pigmentation of the resin in which the fibers are implanted. This method of obtaining monochrome flocked surfaces is widely used. It has, however, several disadvantages, both for the manufacturer of the flocks as for the industrial applicator:

• for the manufacturer of the flocks, manufacturing in average quantities of a few thousand meters of flocked products in a given uniform color uses a few hundred kilograms of flock fibers, which are dyed in the given color desired (about 200 kg of fibers "flocks" for 2000m ² of flocked product manufactured); the dyeing and finishing of such a large quantity of textile fibers leads to significant rejects of dyes and textile finishing agents, which themselves impose expensive wastewater treatment operations, as well as frequent operations of emptying and cleaning of manufacturing and dyeing equipment;
• in the industrial applicator of flock fibers, these same fabrications in average quantities lead to significant downtime in production as a result of cleaning machines that are essential between each change of color; for example, a production of 2000 m ² of flocked product, in a given color, can occupy a production time of 3 to 4 hours and a preparation and cleaning time of the machine can reach half the duration of production; segmented fabrications also increase the systematic losses generated by the manufacturing process.

• pour le fabricant des fibres "flocks", élimination des opérations de teinture textile et suppression de l'utilisation de matières colorantes, ce qui conduit à des économies de matière et d'énergie, à une réduction des rejets, à l'élimination des opérations de traitement des eaux usées et à une forte amélioration des performances industrielles par accroissement significatif des quantités produites par référence de fibres :

• pour l'applicateur industriel des fibres "flocks", forte amélioration de la productivité par réduction des temps de nettoyage et d'immobilisation des machines (temps pouvant représenter 50% des temps de production) ; réduction des pertes et des rejets engendrés par ces changements de couleur et par les nettoyages ; et élimination de taches salissantes pour le personnel.

On the other hand, it is known to use white or unbleached fibers to make flocked products. The use of white or unbleached fibers has many advantages for both the flock fiber manufacturer and the industrial applicator:

• for the manufacturer of flock fibers, elimination of textile dyeing operations and elimination of the use of dyestuffs, which leads to material and energy savings, reduction of waste, elimination of operations wastewater treatment and a strong improvement in industrial performance by significantly increasing the quantities produced by fiber reference:

• for the industrial applicator of flock fibers, a strong improvement in productivity by reducing machine cleaning and downtime (time which can represent 50% of production time); reduction of losses and rejections caused by these color changes and cleanings; and removal of dirty stains for the staff.

Obtaining a flocked and colored product from white or unbleached fibers is obviously possible through an additional printing operation carried out on the white or ecru flocked product.

Among the printing techniques, the sublimation printing which is applicable to certain synthetic fibers allows the continuous manufacture (in rolls) of flocked and colored products, either united or reproducing a given single color or multicolor design.

This operation is usually done in recovery. More precisely, after the flocked product has been manufactured, a provisional paper pre-printed with sublimable inks is brought into contact with the flocked product and the assembly is worn for several seconds at a temperature of about 200 ° C. which can trigger the sublimation of the pigments contained in the ink used. The impression carried by the temporary paper is thus faithfully "transferred" hot on the flocked support, giving the latter a colorful, plain or multicolored, depending on the graphic characteristics of the preprinted temporary paper.

This sublimation printing method, used by the holder of the present patent application to print his flocked articles continuously, is described in particular in EP-A-0 913 271 (or US-B-6,224,707), and EP-A-0 993 963 (or US Pat. No. 6,249,297). These two documents provide for the use of "flock" fibers made of polyamide or polyester, whose "title" (diameter) is between 0.5 Dtex and 20 Dtex, and whose length is between 0.3mm and 3mm.

The polyamide fibers, for example "nylon 6" or "nylon 6-6" (registered trademarks) are quite resistant to the crushing imposed by the sublimation printing operation, during which the "flock" fibers are subjected to the combined effect of heat - about 200 ° C to 210 ° C - and the pressure of support of the pre-printed paper on the flocked support. On the other hand, resistance to washing and rubbing, dry and wet, The colors thus obtained on the polyamide fibers and the liveliness of these colors are low.

On the other hand, the polyester fibers lead to prints having very good fastness or resistance to washing, friction, light ... and they make it possible to obtain sustained and lively colors. Under the conditions described in the aforementioned documents, polyester flock fibers, however, have the disadvantage of lying down under the combined action of temperature and pressure during the sublimation printing operation. As a result, the "flock" fibers on the surface of the flocked and colored support have a crush and general orientation unpleasant. The touch of the flocked surface is rough, at least in one direction, that is to say in the direction corresponding to the passage of a finger in the direction to "fur-back", and the printed surface is flat and crushed.

This crushing phenomenon could be limited by decreasing the intensity of the pressure exerted during the sublimation printing operation. However, a perfect and stable contact must be maintained between the flocked support and the preprinted temporary paper throughout the duration of the sublimation printing operation. If it were not so, any movement, even small, of one of the two elements relative to the other during this operation would give the impression obtained on the flocked medium a blurred or "drooled" appearance. However, the fact of having to maintain a close contact between the pre-printed paper and the flocked medium during the entire printing-sublimation operation obviously involves exerting a certain pressure on the assembly and to ensure that this pressure perfect consistency and a very good regularity. A compromise must therefore be found between, on the one hand, a sufficiently strong pressure to maintain a close contact between the preprinted paper and the flocked support and, on the other hand, a sufficiently low pressure to avoid crushing the flock fibers of the flocked support during the sublimation printing operation. Such a compromise is difficult to find and, in any case, it does not allow to give complete satisfaction both in terms of the sharpness of the impression obtained and in terms of a soft touch of the flocked surface of the support .

The negative effect of crushing caused by the sublimation printing operation could be limited by the use, as a flocking adhesive, of a polymer resin with a high softening point and melting point, or by the choice polyester fibers having improved temperature resistance, such as for example "PCT" type fibers. The improvement obtained with low temperature-sensitive polymer resins is significant, but it does not prevent the preferred orientation of the "flock" fibers. Fibers with improved thermal resistance exist, but they are only available in titers higher than 1.5 Dtex and the printed flocked product obtained with these fibers still retains a "rough" feel. The use of such fibers is therefore possible, but the result obtained is not satisfactory in terms of the "touch" of the flocked product.

The present invention therefore aims to provide a method for obtaining, from white or unbleached fibers, a flocked and colored product having an extremely soft feel, without orientation and insensitive to the action of temperature (this method does not does not interfere with any orientation of the flock fibers imparted to the flocked layer before the sublimation operation).

For this purpose, the subject of the invention is a process for the continuous production of a flocked and colored sheet support, comprising the steps successive application of a layer of polymerizable resin on at least one side of the sheet support, projection of polyester flock fibers, white or unbleached, on said resin layer, polymerization of the resin to fix the flock fibers at web support, depositing at least one sublimable dye on the flocked face of the web support and sublimation of the dye deposited to color the flock fibers, characterized in that for the projection step super micro-fibers are used polyester having a titer of less than 0.5Dtex, and a length of between 0.2 and 0.5mm.

As will be seen in detail below, these super microfibers give the flocked surface an exceptionally soft feel and have the advantage of being virtually insensitive to crushing when subjected to the combined action of heat and heat. the pressure during the deposition and sublimation step of the dye (s) (transfer printing and sublimation). This property is surprising and unexpected because until now it was commonly and logically admitted that fibers of greater diameter (title) have a higher resilience. Furthermore this property allows the use of products flocked with these super micro-fibers in applications such as thermo-bonding, thermoforming or thermo-compression (hot molding of parts covered with a flocked support) or the mold decoration, better known to those skilled in the art under the designation "decoration in mold", or other similar operations without the crushing of the flock fibers and without altering the visual appearance or the very soft touch of the flocked product. In the "decoration in mold" a plastic material is injected into a mold whose cavity has a surface which is at least partially covered with a flocked plastic film whose flock fibers are turned towards the inner surface of the mold cavity.

• les super micro-fibres utilisées ont un titre d'environ 0,3 Dtex ;
• les super micro-fibres utilisées ont une longueur d'environ 0,3mm ;
• les super micro-fibres utilisées ont une longueur d'environ 0,4mm ;
• on utilise à titre de résine polymérisable une résine 100% solide, à point de ramollissement élevé, de préférence à point de ramollissement supérieur à 170°C, par exemple une résine polyuréthane ;
• on utilise à titre de résine polymérisable, une résine à faible pouvoir adhésif, par exemple une résine acrylique en dispersion aqueuse modifiée ;
• dans un mode de réalisation du procédé de l'invention, l'étape de dépôt d'au moins un colorant sublimable consiste en une opération d'impression par transfert ;
• dans un autre mode de réalisation du procédé de l'invention, l'étape de dépôt d'au moins un colorant sublimable consiste en une opération d'impression par jet d'encre ;

The method of the present invention may further include one or more of the following features:

• the super micro-fibers used have a titre of about 0.3 Dtex;
• the super micro-fibers used have a length of about 0.3 mm;
• the super micro-fibers used have a length of about 0.4 mm;
• a 100% solid resin having a high softening point, preferably having a softening point greater than 170 ° C., for example a polyurethane resin, is used as the polymerizable resin;
• a low tack resin, for example an acrylic resin in modified aqueous dispersion, is used as the polymerizable resin;
• in one embodiment of the method of the invention, the step of depositing at least one sublimable dye consists of a transfer printing operation;
• in another embodiment of the method of the invention, the step of depositing at least one sublimable dye consists of an ink jet printing operation;

• la figure 1 est un schéma de principe illustrant les principales étapes du procédé selon un premier mode de réalisation de l'invention ;
• la figure 2 est un schéma de principe illustrant les principales étapes du procédé selon un second mode de réalisation de l'invention.

Other objects, features and advantages of the invention will become apparent from the following description of two embodiments of the invention given by way of example with reference to the appended drawings, in which:

• Figure 1 is a block diagram illustrating the main steps of the method according to a first embodiment of the invention;
• Figure 2 is a block diagram illustrating the main steps of the method according to a second embodiment of the invention.

Referring to FIG. 1, it can be seen that the method according to the invention comprises a first step 1 of applying a layer of an adhesive A (polymerizable resin RP) on one side of a support S which is continuously moving in the direction indicated by the arrow F, a second step 2 or flocking step of projecting flock fibers FF on the polymerizable resin layer RP, a third step 3 or fixing step of polymerizing the resin of the adhesive A for fixing the foot of the flock fibers FF in the resin, the free portion of said flock fibers FF extending substantially perpendicularly to the surface of the resin layer, and a fourth step 4 or printing-sublimation step of depositing at least one ink E containing at least one sublimable dye and sublimating the sublimable dye (s) contained in the ink in order to color the flock fibers FF.

The support S can be chosen from a wide range of flockable media, such as paper, cardboard, plastic film, fabric or nonwoven. In the case where the support S is constituted by a plastic film, the support may, in some cases, before treatment by the process of the invention or before step 4 thereof, be advantageously stabilized by thermal bonding of the film plastic on a temporary support in a manner similar to that described in EP-A-0 993 963 already mentioned above. In any case, the support S may be in the form of a roll which is placed on a supply reel (not shown in the figure) from which the roll is unrolled continuously to carry out the operations of steps 1 to 4 of the process according to the invention.

In step 1, the polymer resin RP used as adhesive A can be deposited in thickened and / or thixotropic aqueous emulsion (acrylic resins or polyurethanes), in the form of plastisols, or, in a preferred version of in the form of liquid resins 100% solid or "high solid", polymerizable thermally or by irradiation (ultraviolet or electron beam). The latter resins, 100% solids or "high solid" have the advantage of being able to present a very high softening point, which may be useful when the support S, once flocked, is subsequently subjected to heat treatments at high temperature. relatively high temperatures. An example of a "high solid" resin that can be used for step 1 is the "IMPRANIL-IMPRAFIX" system from Bayer, Germany.

In the case where the flock fibers FF must be fixed temporarily to the support S, for example when the flock fibers FF of the flocked and colored support obtained by the process of the invention must be able to be transferred in whole or in part to another support, for example a textile support, after having been completely covered or selectively depending on the case, by a coating operation or by a screen printing operation, a heat-activatable adhesive layer (hot-melt-based system in the course of a subsequent treatment of the flocked and colored support, a resin having a low adhesive capacity is used as the polymerizable resin R. For this temporary fixation of the flocked fibers, it is possible to use, for example, an acrylic resin which is deposited in modified aqueous dispersion, in a limited amount, for example from 30 to 60 g / m ² (weight of dry resin).

According to the desires or needs, the polymeric resin layer RP used as adhesive A may be uniformly coated or a given drawing, for example by screen printing to the frame, rotary. The resin layer has a final thickness of between 15 and 100 μm, depending on the nature of the flock fibers FF used for the second stage (flocking step 2). In general, the more the flock fibers used have a fine title and a short length, the more the thickness of the polymerizable resin layer may be low.

In step 2, white or unbleached FF flock fibers are projected into the polymer resin layer RP by any of the conventional flocking techniques, which are well known and therefore do not need to be used. to be described in detail.

In the process of the invention, polyester microfibers (standard polyester of the PET type) with a titre of less than 0.5 Dtex and a length of between 0.2 and 0.5 mm are used as flock fibers. , so as to obtain a flocked medium having a very soft feel.

In a preferred version of the invention, super micro-PET fibers having a title close to 0, 3Dtex and cut to a length of 0.3 or 0.4 mm are used. These fibers are sold by VELUTEX-FLOCK S.A. in GRANOLLERS, Spain.

These super micro-PET fibers give the flocked surface an exceptionally soft feel and have the advantage of being virtually insensitive to crushing when subjected to the combined action of heat and pressure. This surprising and unexpected property (it is commonly and logically admitted that fibers of larger diameter have a higher resilience) allows the use of products flocked with these fibers in applications such as thermo-bonding, thermoforming, thermo-compression or "in-mold decoration", without the occurrence of a crushing the flock fibers and without altering the visual appearance or the very soft touch of the flocked product.

In step 3, the polymerizable resin RP is polymerized by irradiation (UV or electron beam) or by thermal means. The thermal polymerization can be carried out for example by passing the support S in a tunnel furnace or on the peripheral surface of a rotating heating drum, at a temperature between 100 ° C and 180 ° C.

In step 4, the deposition and sublimation of the sublimable dye (s) contained in the ink E may be carried out for example by a transfer printing and sublimation operation in a manner similar to that described in EP-A-0 993 963 already mentioned above. Although the technique of transfer printing and sublimation is here preferred, other known techniques can of course be used in step 4 for the deposition and sublimation of the ink E on the flocked face of the support S without as far beyond the scope of the present invention, as will be seen later on the second embodiment.

In step 4, the sublimable dyes contained in the ink E are activated. They pass in the vapor phase and are fixed permanently on the FF flock fibers which have been implanted and fixed to the support S in steps 2 and 3. If, in step 4, the ink E has been deposited in a uniform manner and monocolore, the product flocked with white or unbleached fibers then takes the uniform color corresponding to the chosen coloring formula. On the other hand, if in step 4, the ink E has been printed in a multicolored pattern, the surface of the flocked product will accurately and sharply reproduce the original pattern, the path of the gaseous dyes being unidirectional.

After step 4, the assembly composed of the support S and the layer of colored "flock" fibers is cooled by natural cooling or, preferably by forced cooling, for example by passing on the peripheral surface of one or more rotary drums cooled by a circulation of water. In the case where the support S is a plastic film stabilized by a temporary support, the latter is separated from the plastic film and wound on a reel winding for eventual re-use as a temporary support.

On the other hand, whatever its nature, the support S, flocked and colored, can be wound on a reel (not shown in the figure) for later use or for possible subsequent processing for example "decoration in mold", thermoforming, thermo-compression, thermo-bonding or others.

For comparative purposes, printing tests of products flocked with conventional polyester fibers (1.7Dtex) and with super micro-PET fibers according to the invention (0.3Dtex) were carried out under the following conditions:
the support S consisted of a film made of a plastic material such as polyurethane, having a basis weight of 150 gr / m ² ;
- the polymerizable resin layer RP for fixing the flock fibers had a basis weight of 100g / m ² in the case of 0,3Dtex fibers according to the invention and a basis weight of 150g / m ² in the case of conventional fiber 1.7Dtex;
the polyester fibers fixed in the resin were super micro-fibers of 0.3Dtex (diameter of approximately 2 μm) cut at 0.3 and 0.4 mm for the fibers of the process according to the invention and fibers of 1.7 Dtex (diameter of about 10μm) cut to 0.5 and 0.6mm for the fibers of the conventional process; measurements under the microscope made it possible to measure the length of the fibers which remained "free", the part having penetrated into the adhesive layer being 0.1 mm for the shortest fibers and 0.15 mm for the 0.6 mm fibers; all these values are measured with an accuracy of +/- 12%;
in all cases, printing of the flocked side of the support S by the transfer and sublimation process took place at a pressure of 2 bar (0.2 MPa) and a temperature of 210 ° C. for 25 seconds; the thickness of the flocked product before and after printing was measured at the plateau comparator under a constant pressure of 20 g / cm ² (identical crushing of the fibers in all cases);
the touch of the flocked surface was evaluated subjectively by three different people, the score of 10/10 being attributed to the flocked layer with the super-softest micro-fibers (0.3Dtex, 0.4mm) before any treatment. PET polyester flocks polymer resin weight flock weight thickness before printing resin + free flocks thickness after printing resin + free flocks loss on thick free flocks touch before printing touch after print g / m ² g / m ² microns microns 0.3Dtex 0.3mm 250 40-45 300 + 200 = 500 300 + 150 = 450 - 50 μm = 25% 9/10 8/10 0,3Dtex 0,4mm 250 40-45 300 + 300 = 600 300 + 210 = 510 - 90 μm = 30% 10/10 9/10 1.7Dtex 0.5mm 300 70-75 350 + 400 = 750 350 + 210 = 560 - 190 μm = 48% 6/10 3/10 1.7Dtex 0.6mm 300 70-75 350+ 470 = 820 350+ 250 = 600 - 220 μm = 47% 6/10 3/10

The results of the tests are recorded in the table above.

Conclusions:

• the 0.3Dtex micro-fibers, cut at 0.3 and 0.4 mm, have a diameter / length ratio of between 0.75 and 1, whereas the ratio of conventional fibers of 1.7 Dtex, cut at 0, 5 and 0.6mm, is between 2.8 and 3.4, ie it is about 3.5 times larger than that of the super micro-fibers, and so the conventional fibers are 3 to 4 times stronger than super micro-fibers;
• after printing, the loss of thickness of the layer corresponding to the "free" portion of the flock fibers is 25 to 30% in the case of super micro-fibers, whereas it is close to 50% in the case of fibers classics who are however 3.5 times stronger;
• the super micro-fibers keep, after printing, a very soft feel, while the conventional fibers, which had previously felt a softer feel than that of super micro-fibers, have a distinctly degraded feel after printing (50%).

Referring now to Figure 2 which shows a second embodiment of the method of the invention. In FIG. 2, steps 1 to 3 are identical to the corresponding steps 1 to 3 of the method of the first embodiment illustrated in FIG. 1 and they will therefore not be described again. The process illustrated in FIG. 2 differs from that of FIG. 1 in that, in step 4, the deposition of the sublimable dye (s) on the flocked face of the support S is carried out by a jet printing operation. 'ink. In other words, in this second embodiment, the sublimable ink or inks are no longer deposited by transfer, but by direct projection of the sublimable ink or inks on the microfibers covering the flocked support S with the aid of a jet printing machine ink, for example a model machine TX2 manufactured by the company MIMAKI, Japan, or a model machine VIPER manufactured by MUTOH Japan. The printing is done without contact or pressure on the flocked medium, so without any risk of crushing flock fibers. The printing can be carried out in a single color or multicolored manner, on all or part of the flocked surface and in a uniform manner or in a desired pattern. This embodiment makes it possible to avoid the cost of the preliminary printing operation of the preprinted temporary paper which, in the first embodiment, is necessary for the operation of transfer / sublimation of the ink to the ink. step 4 of Figure 1.

In the second embodiment, the sublimation of the inks or projected on the flocked surface of the support S is performed in step 5 which preferably takes place continuously immediately after the printing step 4. For this purpose, the flocked and printed support S may be passed through a heating device, such as for example in a tunnel oven, under a ramp of infrared radiation lamps or on the peripheral surface of a heating cylinder, which carries said support S and the ink at a temperature of about 200 ° C for 30 to 40 seconds. Here again, the sublimation is carried out without contact or pressure on the flocked support, so without any risk of crushing flock fibers. Since inkjet printing machines have a relatively limited speed, the length required for the heater may be relatively limited. For example, for a printing speed of 0.5 meters per minute, a heating zone having a 25 cm dimension in the direction of travel of the support S will give a temperature exposure time of 30 seconds, so that the heater can be relatively compact.

It goes without saying that the embodiments of the invention that have been described above have been given as purely indicative and non-limiting examples, and that many modifications can be easily made by the man of the art without departing from the scope of the invention. For example, although in the embodiments described only one of the two faces of the web support S is coated with "flock" fibers and colored, the method described could be applied to both sides of the support S.

Claims (10)

Process for the continuous production of a flocked and colored sheet substrate (S), comprising the successive steps of applying (1) a polymerizable resin layer (RP) to at least one face of the sheet-like, spraying support (2) polyester fiber flocks (FF), white or unbleached, on said resin layer, polymerizing (3) the resin to fix the flock fibers to the web support, depositing (4) at least one sublimable dye (E) on the flocked side of the web support and sublimation (4) of the dye deposited to color the flock fibers, characterized in that for the projection step (2) super polyester microfibers are used having a titre of less than 0.5Dtex, and a length of between 0.2 and 0.5mm. Process according to Claim 1, characterized in that the super micro-fibers used have a titre of approximately 0.3 Dtex. Process according to Claim 1 or 2, characterized in that the super micro-fibers used are approximately 0.3 mm long. Process according to Claim 1 or 2, characterized in that the super micro-fibers used are approximately 0.4 mm long. Process according to any one of Claims 1 to 4, characterized in that a 100% solid resin with a high softening point, preferably with a softening point greater than 170 ° C., is used as the polymerizable resin (RP). . Process according to claim 5, characterized in that the polymerizable resin (RP) is a polyurethane resin. Process according to one of Claims 1 to 4, characterized in that a resin having a low adhesive strength is used as the polymerizable resin (RP). Process according to claim 7, characterized in that the polymerizable resin (RP) is an acrylic resin deposited in a modified aqueous dispersion. Process according to any one of Claims 1 to 8, characterized in that the step of depositing at least one sublimable dye consists of a transfer printing operation. Process according to any one of claims 1 to 8, characterized in that the step of depositing at least one sublimable dye is an ink jet printing operation.

Images