EP0219378A1 - Method and apparatus for the production of thermally adhesive textile materials - Google Patents

Method and apparatus for the production of thermally adhesive textile materials Download PDF

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Publication number
EP0219378A1
EP0219378A1 EP86401944A EP86401944A EP0219378A1 EP 0219378 A1 EP0219378 A1 EP 0219378A1 EP 86401944 A EP86401944 A EP 86401944A EP 86401944 A EP86401944 A EP 86401944A EP 0219378 A1 EP0219378 A1 EP 0219378A1
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EP
European Patent Office
Prior art keywords
transfer
textile
textile substrate
drops
substrate
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
Application number
EP86401944A
Other languages
German (de)
French (fr)
Other versions
EP0219378B1 (en
Inventor
Pierre Groshens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHARGETEX 16
Lainiere de Picardie BC SAS
Original Assignee
Lainiere de Picardie SA
Lainiere de Picardie BC SAS
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 Lainiere de Picardie SA, Lainiere de Picardie BC SAS filed Critical Lainiere de Picardie SA
Priority to AT86401944T priority Critical patent/ATE48857T1/en
Publication of EP0219378A1 publication Critical patent/EP0219378A1/en
Application granted granted Critical
Publication of EP0219378B1 publication Critical patent/EP0219378B1/en
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B11/00—Treatment of selected parts of textile materials, e.g. partial dyeing
    • D06B11/0076—Transfer-treating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/2481—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including layer of mechanically interengaged strands, strand-portions or strand-like strips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24826—Spot bonds connect components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24843—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] with heat sealable or heat releasable adhesive layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2813—Heat or solvent activated or sealable
    • Y10T428/2817—Heat sealable
    • Y10T428/2826—Synthetic resin or polymer

Definitions

  • the invention relates to a process for manufacturing a fusible textile product for clothing use, a fusible textile product produced by carrying out the process and an installation for carrying out the process.
  • the transfer method is more specifically intended for coating textiles with a certain elasticity, which constitute a support for synthetic leather.
  • This process comprises the following successive steps: first, coating a silicone paper or a steel strip - that is to say a support material - with a coating material. This coating is continuous - the coating material forming a film and produced by the known technique of the scraper. Then, the textile to be coated is placed on the support material coated with the material. coating and the assembly is pressed by means of pressure rollers to carry out the transfer.
  • the transfer is carried out by pressing and, consequently, it is likely that at least part of the coating material enters the textile. Furthermore, it should be noted that the review article mentioned above indicates as a method especially intended for the application of a sticky product, the technique of the "inverted coating roller".
  • Patent DE 2363670 describes a process and an installation for printing a textile material with ink.
  • An endless metal transfer belt receives ink through printing cylinders. Then, the ink on the transfer tape is dried. Then the textile material is pressed onto the transfer strip with simultaneous action of heat, this combination of pressing and heat causing the ink to transfer from the metal strip to the textile material.
  • This process therefore has the same drawback as mentioned above, namely the heating of the textile, which limits the range of textiles which can be used.
  • this process is not intended for coating a fusible material whose characteristics are quite different from those of an ink. Thus the use of a metal strip does not allow the transfer of a fusible material.
  • Patent FR 2454334 describes a process for covering a textile strip with a powdered material, by direct coating, without the need for an intermediate transfer strip.
  • the deposition of powdered material is carried out directly on the textile strip previously heated and also subsequently heated so that the material is fixed and stabilized. After this hot deposition, a roller applies a certain pressure to the textile strip.
  • the addition certificate FR 2367136 describes a process for combining a modifying agent on a nonwoven web comprising fusible thermoplastic fibers.
  • the nonwoven web and a sheet coated with the coating agent pass between two heated cylinders forming a pinch, one of the cylinders having reliefs and the other being smooth.
  • This process allows by a single operation and at the place where the cylinders are in contact but nevertheless in distinct zones (respectively the reliefs and the hollows) to ensure on the one hand the connection of the nonwoven and on the other the transfer of the modifying agent.
  • the latter is not a bonding agent, this function and the characteristics which result therefrom being excluded.
  • This certificate of addition therefore refers to pressing and heat to ensure the transfer.
  • Patent FR 2318914 describes a method and a device for applying hot-melt powdered glue to a textile surface, by direct coating, the textile passing over an initial input cylinder where it is heated to 220 ° C., then on an engraving cylinder comprising cavities at an intermediate temperature of 35 ° C and finally on a final outlet cylinder at a temperature of the order of a hundred degrees Celsius.
  • the deposition is carried out by applying the textile to the engraving cylinder by means of the two inlet and outlet cylinders.
  • This method and the device therefore allow the application of an adhesive network. But this application is made thanks to the heat to which the textile is subjected. It follows that the drawbacks mentioned above with regard to the sensitivity of the textile to heat are not moreover overcome by this patent. In addition, due to the method used, there is obviously penetration of the adhesive into the very thickness of the textile.
  • the object of the invention is to produce a fusible textile product for clothing use which has, in combination, the following two characteristics: on the one hand, the fusible material remains on the surface of the textile substrate of the product, ie does not not penetrate into its thickness; on the other hand, the textile substrate used can - without this being necessary - be of a very heat-sensitive type, without being damaged during the manufacturing process.
  • the fusible material is distributed in points scattered on the external face of the textile substrate.
  • the invention therefore first proposes a method of manufacturing a heat-bonding textile product for clothing use and consisting of a textile substrate comprising on one of its external faces of the heat-bonding material, transfer process consisting in first depositing on a transfer support said thermobonding material and then to transfer the thermobonding material from the transfer support on the substrate, the method being characterized by the improvements consisting of the following successive stages: first depositing on the transfer support at least partially non-sticking drops of a pasty dispersion of fusible material. Then, the drops thus initially deposited on the transfer support are heated in order to ensure the drying of the dispersion deposited and the melting of the fusible material which constitutes it.
  • the drops thus dried being placed on the transfer support and the textile substrate are brought into contact, without heating said textile substrate, the fusible material. being transferred from the transfer support to the textile substrate, in the form of points, without however penetrating inside the substrate owing, on the one hand, to the fact that the fusible material adheres more to the textile substrate than to the transfer support and, d On the other hand, only make contact of the heat-bonding material with the textile substrate rather than pressing the transfer support on the textile substrate.
  • the invention also proposes, next, an installation for implementing this method which comprises first means for driving the textile substrate and second means for driving a transfer support, at least partially non-stick as well as , from upstream to downstream and arranged successively, means for depositing drops of a pasty dispersion of fusible material, means for heating the drops thus deposited, and means for transferring the drops thus dried from the transfer support onto the textile substrate.
  • the textile substrate is not heated during the transfer or, moreover, before or after the transfer, which makes it possible to use any type of desired textile substrate.
  • the transfer is not carried out by pressing, but only by contact of the fusible material with the textile substrate, the transfer support remaining spaced from the textile substrate during of the transfer.
  • the invention relates to a method and an installation for manufacturing a fusible textile product 1 for clothing use, consisting of a textile substrate 2 comprising on one of its external faces 3 of the fusible material.
  • the heat-bonding material is distributed on the textile substrate 2 at points 4 dispersed on the corresponding external face 3.
  • points is meant individualized zones, that is to say unconstrained zones, as opposed to a continuous film in particular and most generally of general shape at least pseudo circular resembling the outline of a drop.
  • the expression “point” also covers a more or less extensive linear or surface shape, rectilinear, etc., always in opposition to a continuous shape.
  • the invention also relates to such a fusible textile product 1 produced by the process or by means of the installation according to the invention.
  • the textile product 1 according to the invention has the characteristics on the one hand that the textile substrate 2 can be of a very heat-sensitive type and, on the other hand, that the fusible material remains on the surface of the textile substrate 2 without penetrating inside, in the thickness of the textile substrate 2, regardless of the nature of the textile used.
  • the textile substrate 2 is arbitrary, depending on the desired application, for example composed of yarns based on natural or synthetic fibers that are not very sensitive to heat (polyester, polyamide 6-6, polyethylene) or very thermally fragile (polyamide 6, polypropylene, acrylate, PVC type "Rhovyl” (registered trademark).
  • This substrate is generally in the form of a sheet or transversely deformable strip, in particular being able to be wound on itself or on a cylinder or roller.
  • the fusible material is applied to the sheet but does not penetrate inside, perpendicularly.
  • FIG. 3 a point of fusible material which is applied to a textile substrate 2 by one of the traditional methods. It can be seen that point 5 has an external part 5a disposed on the face 3 of the substrate and a part 5b which has diffused inside the textile material fibers forming the substrate 2. This part 5b makes the textile product less flexible and decreases the useful quantity of fusible material constituted by the external part 5a.
  • the points 4 do not penetrate into the textile substrate 2, - that is to say remain entirely in relief on the face 3 - and the textile product retains its original flexibility while being effective from the point in terms of bonding, the fusible material not being "lost" in the thickness of the textile substrate 2.
  • the fusible material per se is not directly the subject of the invention. They are copolyamide and / or thermoplastic copolyester and / or chemical derivatives of one or both, alone or in combination with other thermoplastic copolymers, thermosetting in aqueous and / or alcoholic dispersion and / or other polar solvent, originally present at room temperature in the form of a paste.
  • the process according to the invention is of the transfer type, that is to say that the heat-bonding material is first deposited on a transfer support 6 and then the heat-bonding material is transferred from the transfer support 6 to the substrate 2.
  • the method according to the invention is characterized by the improvements consisting of the following successive steps: firstly drops on the transfer support 6 at least partially non-sticking drops 7 of a dispersion of fusible material. Then we heat the drops as well initially deposited on the transfer support 6 in order to ensure the drying of the dispersion deposited and the melting of the fusible material which constitutes it.
  • the drops thus dried on the transfer support 6 and the textile substrate 2 are then brought into contact without heating said textile substrate 2, the fusible material being transferred from the transfer support 6 to the textile substrate 2, in the form of points, without however penetrating inside the substrate 2 because, on the one hand, that the fusible material adheres more to the textile substrate 2 than to the transfer support 6 and, on the other hand, that only a contact of the fusible material with the textile substrate 2 rather than pressing the transfer support 6 on the textile substrate 2.
  • the expression “drop” refers more particularly to the case of a circular point deposit. However, the expression drop also covers, within the meaning of the present invention, a deposit which is more or less linear or surface.
  • the transfer support 6 is moved on which the drops 7 of dispersion of fusible material have been deposited and dried in synchronism and side by side with the textile substrate 2 and this in a transfer zone from a zone of convergence this transfer zone being able to carry out the transfer of the drops.
  • the term “convergence zone” means the zone where the support 6 and the substrate 2 are brought close to each other, this zone being punctual or, at least, of limited length.
  • the term “transfer zone” is understood to mean a zone of more extended length from the convergence zone and downstream where the transfer is actually carried out.
  • the transfer support 6 is kept apart in parallel and without direct contact with the textile substrate 2 and the spacing between them is adjusted according to the thickness of the drops deposited, in order, simultaneously, to ensure the transfer while avoiding the penetration of the textile substrate 2 with the fusible material.
  • the mattness of the dots of fusible material on the textile substrate 2 is adjusted as a function of the dullness of the transfer support 6. Indeed, depending on the dullness of the support 6, dots 4 or glossy dots are obtained. Thus by adjusting the mattness of the support 6, one obtains more or less matt points 4. When the support 6 is shiny, the points 4 are shiny. Indeed, a non-stick support 6 is shiny when it is smooth and without roughness. When liquid drops 7 are deposited on such a support, the surface of the solid drops after cooling is smooth. On the contrary, a non-stick support 6 is matt when it has asperities and these are found on the external surfaces of the solid drops after cooling.
  • the deposition on the transfer support 6 is preferably carried out by screen printing or heliography rather than by scraping, the deposition technique not being, per se, the object of the present invention.
  • the transfer support 6 is preferably constituted by a mat of glass fabrics coated with a non-stick product, in particular based on polytetrafluorethylene or silicone.
  • a non-stick transfer support 6 rather than a simple metal or paper strip only, as is the case in the prior art, is one of the conditions favoring the transfer of the fusible material from the support. 6 on the substrate 2 by contact and not by pressing.
  • Transfer by contact is understood to mean a transfer of the heat-bonding material by means of a transfer support 6 and by contact of said heat-bonding material with the textile substrate 2 but without direct contact between the textile substrate 2 and the transfer support 6 This therefore explains the adjustment of the spacing between the substrate 2 and the support 6, at most to the thickness of the drops deposited and dried, as mentioned previously (with compensations for the thicknesses of the substrate 2 and support 6 close).
  • the substrate textile 2 is not heated, that is to say that it is at ambient temperature, having moreover not been previously heated.
  • the textile substrate 2 is not further heated and, if necessary, the dots 4 of fusible material on the textile substrate 2 are cooled (and consequently the substrate 2 itself, in general) and this in order to solidify them. Indeed, this solidification is not yet achieved since the transfer (convergence zone) occurs immediately or shortly after the drying of the drops 7 and the melting of the polymer or polymers making up said drops 7.
  • an additional heat supply is made in the convergence zone.
  • Such a supply of heat aims to facilitate, as far as necessary, the transfer.
  • this heat supply cannot be substituted for the prior heat supply relating to the drops 7 and is not aimed at their drying.
  • it if such an addition of heat is desired, it relates more to the drops 7 (possibly the transfer medium 6 consequently) than to the textile substrate 2.
  • such additional heating is only necessary to keep in fusion the fusible polymers with high melting point and high viscosity in the molten state.
  • An installation for implementing the method comprises first drive means 15 for the textile substrate 2 and second drive means 12 for a transfer support 6, at least partially non-stick as well as from upstream to downstream and arranged successively, means 8, 10 for depositing drops of a dispersion of fusible material on the support 6, heating means 14 for the drops thus deposited, and transfer means 12, 15, 16, 17 for the drops as well dried from the transfer medium on the textile substrate 2.
  • the drop transfer means consist of the first and second drive means 12, 15 arranged to operate in synchronism and of calendering cylinders or the like 16, 17 slightly spaced transversely so as to also maintain the transfer support 6 and the textile substrate 2 apart and without direct contact with each other, the spacing between them being adjusted as a function of the thickness of the drops deposited (and of the thickness of the substrate 2 and of the support 6) in particular by adjustment means acting on the calendering cylinders 16, 17.
  • the transfer means 12, 15, 16, 17 are devoid of means for direct reciprocal pressure of the textile substrate 2 and of the transfer support 6 in order to ensure their intimate contact.
  • the transfer means 12, 15, 16, 17 provide a transfer zone of a certain length capable of allowing the transfer of the drops.
  • the transfer zone is devoid of means for heating the textile substrate 2.
  • the first drive means 15 are constituted for example by one of the calendering cylinders 16, 17 belonging to the transfer means, this calendering cylinder being driven in rotation by drive means such as a motor.
  • the second drive means 12 are constituted, for example, by a drive cylinder placed downstream of the device, in particular after the calendering cylinders 16, 17 and at the end of the transfer zone.
  • the means 8, 10 for depositing drops, in the pasty state on the non-stick transfer support 6 comprise, for example a cylinder 8 of rotogravure or serigraphy of axis 9 and a full counterpart cylinder 10, opposite , of axis 11 parallel, the two cylinders 8, 10 being in contact on either side of the transfer support 6.
  • These two cylinders 8, 10 are placed essentially upstream of the device and rotate in opposite directions by means such as an engine.
  • This motor is associated with the motor of the drive means 12 so that, upstream and downstream, the transfer support 6 moves at the same linear speed.
  • the heating means 14 can be the subject of numerous variant embodiments. These are essentially means for heating the drops 7 by radiation (for example by infrared or microwave) or even by convection (hot air) rather than by conduction and this taking into account that the transfer support 6 is, in itself, normally little or poorly conductive of heat.
  • the heating means 14 are of variable intensity (over their length) and extend over a length (therefore, taking into account the speed of travel of the transfer support 6 are active for a corresponding duration) such as the drops 7 deposited by the cylinders 8, 10 are successively dried then the polymer which constitutes the fusible material is at least partially molten. It should be observed that the heating means 14 are normally placed on a linear path of the transfer support 6 between the deposition cylinders 8, 10 and the calendering cylinders 16, 17. This arrangement makes it possible to distribute the heating means 14 over the desired path length, without jeopardizing the architecture of the device, this which would not be the case if the heating means were integrated into a cylinder, the length of the path then being fixed and limited.
  • the heating means 14 are placed downstream, generally near the deposition cylinders 8, 10, in order to avoid too great a bulk of the installation. In general, they are placed upstream of the calendering cylinders 16, 17, close enough to them so that the fusible polymers are still in fusion in the convergence zone while being arranged so as not to unduly heat the textile substrate 2 arriving on the calendering cylinder 16.
  • the calendering cylinders 16, 17 define the convergence zone. These two cylinders are in particular identical, of the same radius, smooth, with parallel axes, driven in opposite directions in synchronism. They are slightly separated transversely from each other, that is to say that they are not tangent, of course, but that their generatrices opposite, the closest, are separated from each other and not in contact, this spacing being adjusted as a function of the thickness of the drops deposited by the deposition cylinders 8, 10. In particular this spacing is such that it is at most equal to the thickness of the drops, to the thicknesses of the substrate 2 and support 6 close.
  • the axes of the calendering cylinders 16, 17 can be carried by two pairs of reciprocal adjustable spacing bearings. Adjustment means such as worms or the like make it possible to adjust this spacing. Locking means such as nuts or the like allow this fixed spacing to be maintained.
  • the adjustment means generally comprise means for identifying the value of the spacing.
  • Return or deflection cylinders or the like make it possible to define the end of the transfer zone and the start of the divergence zone of the textile substrate 2 and of the transfer support 6.
  • the return cylinders are arranged in a similar manner to the return cylinders.
  • calendering 16, 17 so as to be apart in a comparable manner to the calendering cylinders 16, 17.
  • the calendering cylinders 16, 17 and the cylinders of reference are axially spaced apart by a length defining the length of the transfer zone. This length is adjustable, if necessary, the bearings of the calendering and deflection cylinders being arranged accordingly. In all cases, this length is such that the heat-bonding polymer has time to recrystallize so that at the end of the transfer zone the drops 7 are fully transferred from the support 6 to the substrate 2.
  • light and reciprocal pressure means are associated with the calendering cylinders 16, 17, respectively with the return cylinders with the sole function of ensuring the maintenance of the desired spacing between the substrate 2 and the support 6 and therefore the quality of the transfer.
  • the light pressure means therefore essentially aim to ensure that the substrate 2 and the support 6 are properly applied to their respective calendering cylinder.
  • pressure means are not intended to ensure direct contact with pressure between the calendering or return cylinders respectively, such direct contact with pressure in front, on the contrary , be avoided.
  • additional heating means are also provided located at the upstream limit of the convergence zone, intended to essentially heat the drops 7.
  • additional heating cannot replace the heating means 14 and do not have the same function as the heating means 14.
  • additional heating means are only necessary to keep the polymers in fusion until the time of transfer. This variant is only useful for polymers with a high melting point and high viscosity in the molten state.
  • the textile substrate 2 and the transfer support 6 are separated from one another by means of deflection cylinder or the like.
  • the textile substrate comprising the dots 4 of heat-bonding material is, for example, wound in a reel 18 downstream of the transfer zone.
  • the installation also includes, and possibly, means capable of cooling the dots 4 of fusible material once transferred onto the textile substrate 2, located in the transfer zone downstream from the convergence zone.
  • these means are constituted by the unheated ambient air in which the substrate 2 circulates with the points 4 of fusible material.
  • these means are effective means of cooling by production of cold, such as cooling plates in which a cooling fluid circulates, plates which are in direct contact with the transfer support and located opposite the textile substrate 2; or such as a cooling box in the walls of which circulates a cooling liquid in order to maintain an atmosphere in said box such that the textile support assembly 2, heat-bonding points 7 and non-stick support 6 are placed at low temperature and protected from any unwanted condensation moisture.
  • these means are placed upstream of the spool 18 so that the textile 1 is only spooled once the product is transferred perfectly stable.
  • the installation does not include means for heating the textile substrate 2 before the transfer.
  • the calendering cylinder 16 on which the textile substrate 2 is located is not heated, and according to a variant of the invention, can be cooled by circulation of coolant in order to freeze the molten polymer as soon as it comes into contact with textile 2.
  • the installation operates discontinuously, the transfer support 6 extending between an upstream storage coil 13 placed upstream of the deposition cylinders 8, 10 and a downstream storage coil placed downstream of the return cylinders, in particular in the region of the reel of fusible textile product 19.
  • the upstream storage reel 13 is empty, it is replaced by the reel of downstream storage 19 and the operating cycle can start again.
  • the installation operates continuously, the transfer support 6 is continuous, endless, stretched for example between three cylinders 20, 21, 22 with which the second drive means are associated .
  • the transfer support 6 after passage between the calender cylinders 16, 17 passes over a first drive roller 20, over a second roller 21 placed between the roller 20 and a third roller 22 upstream of the deposition cylinders 8, 10.
  • Under the roller 21 is placed a brush 23 which makes it possible to clean the surface of the transfer support 6 from the particles of dots or drops which could remain there.
  • the transfer support 6 and the textile substrate 2 are, in the main part of the installation tensioned and driven in synchronism, in particular continuously at constant speed. In the convergence zone where the substrate 2 and the support 6 are opposite, they are spaced apart and parallel to each other, only the drops 7 previously heated ensuring contact between them, the transfer being carried out due to greater relative adhesion of the fusible material with the substrate 2 than with the non-stick support 6.

Abstract

1. Process for the manufacture of a thermally adhesive textile product for use in garments and consisting of a textile substrate (2) having on one of its external faces (3) hot-melt adhesive, consisting firstly in depositing the said hot-melt adhesive on a transfer support (6) and then transferring the hot-melt adhesive from the transfer support (6) onto the substrate (2), characterized in that firstly drops (7) of a dispersion of hot-melt adhesive are deposited on the transfer support (6) which is at least partially non-stick ; the drops thus initially deposited on the transfer support (6) are then heated in order to ensure that the dispersion deposited is dried and the hot-melt adhesive constituting it is melted ; the drops thus dried and situated on the transfer support (6) are then put in contact with the textile substrate (2), without heating the said textile substrate (2), the hot-melt adhesive being transferred from the transfer support (6) to the textile substrate (2) in the form of spots, the transfer support remaining distanced from the textile substrate during the transfer by a distance which is related to the thickness of the drops, allowing contact of the hot-melt adhesive with the textile substrate (2) to be ensured.

Description

L'invention concerne un procédé de fabrication d'un produit textile thermocollant pour usage vestimentaire, un produit textile thermocollant réalisé par la mise en oeuvre du procédé et une installation pour la mise en oeuvre du procédé.The invention relates to a process for manufacturing a fusible textile product for clothing use, a fusible textile product produced by carrying out the process and an installation for carrying out the process.

On connaît déjà la réalisation de points thermocollants sur un substrat textile, par enduction dudit substrat avec une matière thermocollante, à partir de pâte, dispersion, émulsion ou solution. Dans le cas où le substrat est un non-tissé, l'enduction d'une pâte de matière thermocollante donne généralement satisfaction. Dans le cas de substrats textiles, une enduction par cadre sérigraphique ou héliographique a comme inconvénient que la matière thermocollante peut pénétrer dans l'épaisseur du substrat textile en provoquant son durcissement, et des collages à l'envers incompatibles avec l'usage vestimentaire.We already know the realization of fusible dots on a textile substrate, by coating said substrate with a fusible material, from paste, dispersion, emulsion or solution. In the case where the substrate is a nonwoven, coating a paste of fusible material is generally satisfactory. In the case of textile substrates, a coating by screen or heliographic frame has the drawback that the fusible material can penetrate into the thickness of the textile substrate by causing it to harden, and reverse bonding incompatible with clothing use.

L'article de revue de CIBA-GEIGY RUNDSCHAU d'avril 1974, pages 36 et suivantes, décrit les techniques d'enduction utilisées dans l'industrie textile et notamment la méthode du racloir et la méthode d'inversion ou de transfert. Selon cet article, la méthode de transfert est plus spécialement destinée à l'enduction de textiles présentant une certaine élasticité, qui constituent un support pour du cuir synthétique. Ce procédé comprend les étapes successives suivantes : d'abord, l'enduction d'un papier siliconé ou d'une bande d'acier - c'est à dire un matériau de support - avec une matière d'enduction. Cette enduction est continue - la matière d'enduction formant un film et réalisée par la technique connue du racloir. Ensuite, le textile à enduire est placé sur le matériau de support enduit de la matière d'enduction et l'ensemble est pressé au moyen de cylindres presseurs pour réaliser le transfert. Après le pressage intervient un séchage. Le textile ainsi enduit du film de matière d'enduction est séparé physiquement - c'est à dire écarté - du matériau de support. Toutefois, il est à observer que la technique d'inversion ou transfert ainsi décrite, de l'état de la technique, est caractérisée par la succession des étapes suivantes : enduction par raclage pour former un film de matière d'enduction; puis pressage pour le transfert; enfin séchage, ces trois phases étant exécutées dans cet ordre. Cette technique connue ainsi décrite présente, cependant, plusieurs limites. L'enduction initiale du matériau de support par raclage conduit nécessairement à un film continu de matière d'enduction, ce qui n'est pas approprié à certaines applications telles que les renforts pour vêtements où la matière d'enduction doit être répartie en points dispersés. Le transfert est réalisé avant le séchage de sorte que l'on chauffe également le textile, ce qui exclu, en conséquence, l'emploi de textiles sensibles à la chaleur. Le transfert est réalisé par pressage et, en conséquence, il est probable qu'une partie au moins de la matière d'enduction pénètre dans le textile. Par ailleurs, il est à observer que l'article de revue mentionné ci-dessus indique comme méthode tout spécialement destinée a l'application d'un produit collant, la technique du "rouleau d'enduction inversé".The CIBA-GEIGY RUNDSCHAU review article of April 1974, pages 36 et seq., Describes the coating techniques used in the textile industry and in particular the scraper method and the inversion or transfer method. According to this article, the transfer method is more specifically intended for coating textiles with a certain elasticity, which constitute a support for synthetic leather. This process comprises the following successive steps: first, coating a silicone paper or a steel strip - that is to say a support material - with a coating material. This coating is continuous - the coating material forming a film and produced by the known technique of the scraper. Then, the textile to be coated is placed on the support material coated with the material. coating and the assembly is pressed by means of pressure rollers to carry out the transfer. After pressing, drying takes place. The textile thus coated with the film of coating material is physically separated - that is to say separated - from the support material. However, it should be observed that the inversion or transfer technique thus described, of the state of the art, is characterized by the succession of the following stages: coating by scraping to form a film of coating material; then pressing for transfer; finally drying, these three phases being executed in this order. This known technique thus described has, however, several limitations. The initial coating of the support material by scraping necessarily leads to a continuous film of coating material, which is not suitable for certain applications such as reinforcements for clothing where the coating material must be distributed in dispersed points. . The transfer is carried out before drying so that the textile is also heated, which consequently excludes the use of textiles sensitive to heat. The transfer is carried out by pressing and, consequently, it is likely that at least part of the coating material enters the textile. Furthermore, it should be noted that the review article mentioned above indicates as a method especially intended for the application of a sticky product, the technique of the "inverted coating roller".

Le brevet DE 2363670 décrit un procédé et une installation d'impression d'un matériau textile avec de l'encre. Une bande de transfert, sans fin, en métal, reçoit, grâce à des cylindres d'impression, de l'encre. Puis, l'encre se trouvant sur la bande de transfert est séchée. Ensuite le matériau textile est pressé sur la bande de transfert avec action simultanée de la chaleur, cette combinaison du pressage et de la chaleur provoquant le transfert de l'encre de la bande de métal sur le matériau textile. Ce procédé présente donc le même inconvénient que cité précédemment à savoir le chauffage du textile, ce qui limite la gamme de textiles utilisables. De plus, ce procédé n'est pas destiné à l'enduction d'une matière thermocollante dont les caractéristiques sont tout à fait différentes de celles d'une encre. Ainsi l'emploi d'une bande de métal ne permet pas le transfert d'une matière thermocollante.Patent DE 2363670 describes a process and an installation for printing a textile material with ink. An endless metal transfer belt receives ink through printing cylinders. Then, the ink on the transfer tape is dried. Then the textile material is pressed onto the transfer strip with simultaneous action of heat, this combination of pressing and heat causing the ink to transfer from the metal strip to the textile material. This process therefore has the same drawback as mentioned above, namely the heating of the textile, which limits the range of textiles which can be used. In addition, this process is not intended for coating a fusible material whose characteristics are quite different from those of an ink. Thus the use of a metal strip does not allow the transfer of a fusible material.

Le brevet FR 2454334 décrit un procédé de recouvrement d'une bande textile avec un matériau en poudre, par enduction directe, sans la nécessité d'une bande intermédiaire de transfert. Le dépôt de matériau en poudre est effectué directement sur la bande textile préalablement chauffée et également ultérieurement chauffée pour que le matériau soit fixé et stabilisé. Après ce dépôt à chaud un rouleau applique sur la bande textile une certaine pression. Ce brevet mentionne comme étant critique le problème du chauffage de la bande textile. Ce problème est résolu, selon ce brevet par une transmission de chaleur par rayonnement, sans contact, le cylindre principal de l'installation étant refroidi. Toutefois, selon ce procédé, il y a chauffage sinon direct, du moins indirect, de la bande textile pendant toute la durée du cycle de fabrication.Patent FR 2454334 describes a process for covering a textile strip with a powdered material, by direct coating, without the need for an intermediate transfer strip. The deposition of powdered material is carried out directly on the textile strip previously heated and also subsequently heated so that the material is fixed and stabilized. After this hot deposition, a roller applies a certain pressure to the textile strip. This patent mentions as critical the problem of heating the textile strip. This problem is solved, according to this patent by a heat transmission by radiation, without contact, the main cylinder of the installation being cooled. However, according to this process, there is heating if not direct, at least indirect, of the textile strip throughout the duration of the manufacturing cycle.

Le certificat d'addition FR 2367136 décrit un procédé pour associer un agent de modification sur une nappe en non-tissé comprenant des fibres thermoplastiques fusibles. La nappe en non-tissé et une feuille revêtue de l'agent de revêtement passent entre deux cylindres chauffés formant pincement, l'un des cylindres comportant des reliefs et l'autre étant lisse. Ce procédé permet par une opération unique et à l'endroit où les cylindres sont en contact mais néanmoins dans des zones distinctes (respectivement les reliefs et les creux) d'assurer d'une part la liaison du non-tissé et d'autre part le transfert de l'agent de modification. Ce dernier n'est pas un agent de collage, cette fonction et les caractéristiques qui en découlent étant exclues. Ce certificat d'addition se réfère donc au pressage et à la chaleur pour assurer le transfert.The addition certificate FR 2367136 describes a process for combining a modifying agent on a nonwoven web comprising fusible thermoplastic fibers. The nonwoven web and a sheet coated with the coating agent pass between two heated cylinders forming a pinch, one of the cylinders having reliefs and the other being smooth. This process allows by a single operation and at the place where the cylinders are in contact but nevertheless in distinct zones (respectively the reliefs and the hollows) to ensure on the one hand the connection of the nonwoven and on the other the transfer of the modifying agent. The latter is not a bonding agent, this function and the characteristics which result therefrom being excluded. This certificate of addition therefore refers to pressing and heat to ensure the transfer.

Le brevet FR 2318914 décrit un procédé et un dispositif d'application de colle pulvérulente fusible à chaud sur une surface de textile, par enduction directe, le textile passant sur un cylindre d'entrée initial où il est chauffé à 220° C, puis sur un cylindre de gravure comportant des cavités à température intermédiaire de 35° C et enfin sur un cylindre de sortie final à une température de l'ordre d'une centaine de degrés Celsius. Le dépôt est effectué par application du textile sur le cylindre de gravure au moyen des deux cylindres d'entrée et de sortie. Ce procédé et le dispositif permettent donc l'application d'un réseau de colle. Mais cette application est faite grâce à la chaleur à laquelle est soumis le textile. Il en résulte que les inconvénients mentionnés précédemment quant à la sensibilité du textile à la chaleur ne sont pas d'avantage surmontés par ce brevet. De plus, du fait du procédé employé, il y a , à l'évidence, pénétration de la colle dans l'épaisseur même du textile.Patent FR 2318914 describes a method and a device for applying hot-melt powdered glue to a textile surface, by direct coating, the textile passing over an initial input cylinder where it is heated to 220 ° C., then on an engraving cylinder comprising cavities at an intermediate temperature of 35 ° C and finally on a final outlet cylinder at a temperature of the order of a hundred degrees Celsius. The deposition is carried out by applying the textile to the engraving cylinder by means of the two inlet and outlet cylinders. This method and the device therefore allow the application of an adhesive network. But this application is made thanks to the heat to which the textile is subjected. It follows that the drawbacks mentioned above with regard to the sensitivity of the textile to heat are not moreover overcome by this patent. In addition, due to the method used, there is obviously penetration of the adhesive into the very thickness of the textile.

L'invention a pour but de réaliser un produit textile thermocollant pour usage vestimentaire qui présente, en combinaison, les deux caractéristiques suivantes : d'une part, la matière thermocollante reste à la surface du substrat textile du produit, c'est à dire ne pénètre pas dans son épaisseur; d'autre part, le substrat textile employé peut - sans que cela soit nécessaire - être de type très sensible à la chaleur, sans être détérioré lors du procédé de fabrication. De plus, et préférentiellement, la matière thermocollante est répartie en points dispersés sur la face externe du substat textile.The object of the invention is to produce a fusible textile product for clothing use which has, in combination, the following two characteristics: on the one hand, the fusible material remains on the surface of the textile substrate of the product, ie does not not penetrate into its thickness; on the other hand, the textile substrate used can - without this being necessary - be of a very heat-sensitive type, without being damaged during the manufacturing process. In addition, and preferably, the fusible material is distributed in points scattered on the external face of the textile substrate.

L'invention propose donc d'abord un procédé de fabrication d'un produit textile thermocollant pour usage vestimentaire et constitué d'un substrat textile comportant sur une de ses faces externes de la matière thermocollante, procédé par transfert consistant à d'abord déposer sur un support de transfert ladite matière thermocollante et à ensuite transférer la matière thermocollante depuis le support de transfert sur le substrat, le procédé étant caractérisé par les perfectionnements consistant dans les étapes successives suivantes : on dépose d'abord sur le support de transfert au moins partiellement anti-adhérent des gouttes d'une dispersion pâteuse de matière thermocollante. Puis, on chauffe les gouttes ainsi initialement déposées sur le support de transfert en vue d'assurer le séchage de la dispersion déposée et la mise en fusion de la matière thermocollante qui la constitue. On met en contact, ensuite, les gouttes ainsi séchées se trouvant sur le support de transfert et le substrat textile, sans chauffage dudit substrat textile, la matière thermocollante étant transférée du support de transfert au substrat textile, sous forme de points, sans toutefois pénétrer à l'intérieur du substrat du fait, d'une part, que la matière thermocollante adhère plus au substrat textile qu'au support de transfert et, d'autre part, qu'on réalise seulement un contact de la matière thermocollante avec le substrat textile plutôt qu'un pressage du support de transfert sur le substrat textile.The invention therefore first proposes a method of manufacturing a heat-bonding textile product for clothing use and consisting of a textile substrate comprising on one of its external faces of the heat-bonding material, transfer process consisting in first depositing on a transfer support said thermobonding material and then to transfer the thermobonding material from the transfer support on the substrate, the method being characterized by the improvements consisting of the following successive stages: first depositing on the transfer support at least partially non-sticking drops of a pasty dispersion of fusible material. Then, the drops thus initially deposited on the transfer support are heated in order to ensure the drying of the dispersion deposited and the melting of the fusible material which constitutes it. Then, the drops thus dried being placed on the transfer support and the textile substrate are brought into contact, without heating said textile substrate, the fusible material. being transferred from the transfer support to the textile substrate, in the form of points, without however penetrating inside the substrate owing, on the one hand, to the fact that the fusible material adheres more to the textile substrate than to the transfer support and, d On the other hand, only make contact of the heat-bonding material with the textile substrate rather than pressing the transfer support on the textile substrate.

L'invention propose également, ensuite, une installation pour la mise en oeuvre de ce procédé qui comporte des premiers moyens d'entraînement du substrat textile et des seconds moyens d'entraînement d'un support de transfert, au moins partiellement anti adhérent ainsi que, d'amont en aval et disposés successivement, des moyens pour déposer des gouttes d'une dispersion pâteuse de matière thermocollante, des moyens de chauffage des gouttes ainsi déposées, et des moyens de transfert des gouttes ainsi séchées depuis le support de transfert sur le substrat textile.The invention also proposes, next, an installation for implementing this method which comprises first means for driving the textile substrate and second means for driving a transfer support, at least partially non-stick as well as , from upstream to downstream and arranged successively, means for depositing drops of a pasty dispersion of fusible material, means for heating the drops thus deposited, and means for transferring the drops thus dried from the transfer support onto the textile substrate.

Contrairement aux enseignements de l'état de la technique, le substrat textile n'est pas chauffé lors du transfert ni d'ailleurs avant ou après le transfert, ce qui permet d'utiliser tout type de substrat textile souhaité. De plus, et également, contrairement aux enseignements de l'état de la technique, le transfert n'est pas réalisé par pressage, mais seulement par contact de la matière thermocollante avec le substrat textile, le support de transfert restant écarté du substrat textile lors du transfert.Contrary to the teachings of the state of the art, the textile substrate is not heated during the transfer or, moreover, before or after the transfer, which makes it possible to use any type of desired textile substrate. In addition, and also, contrary to the teachings of the state of the art, the transfer is not carried out by pressing, but only by contact of the fusible material with the textile substrate, the transfer support remaining spaced from the textile substrate during of the transfer.

L'invention sera mieux comprise à l'aide des dessins annexés dans lesquels :

  • La figure 1 est une vue schématique du dispositif selon l'invention.
  • La figure 2 est une vue schématique d'un autre mode de réalisation du dispositif selon l'invention.
  • La figure 3 est une vue en coupe du produit.
The invention will be better understood with the aid of the appended drawings in which:
  • Figure 1 is a schematic view of the device according to the invention.
  • Figure 2 is a schematic view of another embodiment of the device according to the invention.
  • Figure 3 is a sectional view of the product.

L'invention concerne un procédé et une installation de fabrication d'un produit textile thermocollant 1 pour usage vestimentaire, constitué d'un substrat textile 2 comportant sur une de ses faces externes 3 de la matière thermocollante.The invention relates to a method and an installation for manufacturing a fusible textile product 1 for clothing use, consisting of a textile substrate 2 comprising on one of its external faces 3 of the fusible material.

Préférentiellement et selon l'invention, la matière thermocollante est répartie sur le substrat textile 2 en points 4 dispersés sur la face externe correspondante 3. Par "points" on entend des zones individualisées c'est-à-dire non contraints, par opposition à un film continu notamment et le plus généralement de forme générale au moins pseudo circulaires ressemblant au contour d'une goutte. Au sens de la présente invention l'expression "point" couvre également une forme linéaire ou surfacique plus ou moins étendue, rectiligne, etc..., toujours par opposition à une forme continue.Preferably and according to the invention, the heat-bonding material is distributed on the textile substrate 2 at points 4 dispersed on the corresponding external face 3. By "points" is meant individualized zones, that is to say unconstrained zones, as opposed to a continuous film in particular and most generally of general shape at least pseudo circular resembling the outline of a drop. Within the meaning of the present invention the expression "point" also covers a more or less extensive linear or surface shape, rectilinear, etc., always in opposition to a continuous shape.

L'invention concerne également un tel produit textile thermocollant 1 réalisé par le procédé ou grâce à l'installation selon l'invention.The invention also relates to such a fusible textile product 1 produced by the process or by means of the installation according to the invention.

De plus et outre la disposition punctiforme de la matière thermocollante, le produit textile 1 selon l'invention a comme caractéristiques d'une part que le substrat textile 2 peut être de type très sensible à la chaleur et, d'autre part, que la matière thermocollante reste à la surface du substrat textile 2 sans pénétrer à l'intérieur, dans l'épaisseur du substrat textile 2, indépendamment de la nature du textile employé.In addition and in addition to the punctiform arrangement of the fusible material, the textile product 1 according to the invention has the characteristics on the one hand that the textile substrate 2 can be of a very heat-sensitive type and, on the other hand, that the fusible material remains on the surface of the textile substrate 2 without penetrating inside, in the thickness of the textile substrate 2, regardless of the nature of the textile used.

Ces deux caractéristiques peuvent exister en combinaison avec la disposition punctiforme.These two characteristics can exist in combination with the punctiform disposition.

Le substrat textile 2 est quelconque, selon l'application souhaitée par exemple composé de fils à base de fibres naturelles ou de synthèse peu sensibles à la chaleur (polyester, polyamide 6-6, polyéthylène) ou très fragiles thermiquement (polyamide 6, polypropylène, acrylate, PVC type "Rhovyl" (marque déposée).The textile substrate 2 is arbitrary, depending on the desired application, for example composed of yarns based on natural or synthetic fibers that are not very sensitive to heat (polyester, polyamide 6-6, polyethylene) or very thermally fragile (polyamide 6, polypropylene, acrylate, PVC type "Rhovyl" (registered trademark).

Ce substrat se présente généralement sous forme d'une nappe ou bande déformable transversalement notamment pouvant être enroulée sur elle-même ou sur un cylindre ou rouleau. Selon l'invention, la matière thermocollante vient s'appliquer sur la nappe mais ne pénètre pas à l'intérieur, perpendiuculairement. On a représenté (figure 3) en 5 et par comparaison, un point de matière thermocollante qui est appliquée sur un substrat textile 2 par une des méthodes traditionnelles. On voit que le point 5 possède une partie externe 5a disposée sur la face 3 du substrat et une partie 5b qui a diffusé à l'intérieur des fibres de matière textile formant le substrat 2. Cette partie 5b rend le produit textile moins souple et diminue la quantité utile de matière thermocollante constituée par la partie externe 5a.This substrate is generally in the form of a sheet or transversely deformable strip, in particular being able to be wound on itself or on a cylinder or roller. According to the invention, the fusible material is applied to the sheet but does not penetrate inside, perpendicularly. There is shown (FIG. 3) in 5 and by comparison, a point of fusible material which is applied to a textile substrate 2 by one of the traditional methods. It can be seen that point 5 has an external part 5a disposed on the face 3 of the substrate and a part 5b which has diffused inside the textile material fibers forming the substrate 2. This part 5b makes the textile product less flexible and decreases the useful quantity of fusible material constituted by the external part 5a.

Au contraire, selon l'invention, les points 4 ne pénètrent pas dans le substrat textile 2, - c'est à dire restent en totalité en relief sur la face 3 - et le produit textile garde sa souplesse originelle tout en étant efficace du point de vue collage, la matière thermocollante n'étant pas "perdue" dans l'épaisseur du substrat textile 2.On the contrary, according to the invention, the points 4 do not penetrate into the textile substrate 2, - that is to say remain entirely in relief on the face 3 - and the textile product retains its original flexibility while being effective from the point in terms of bonding, the fusible material not being "lost" in the thickness of the textile substrate 2.

La matière thermocollante en soi ne fait pas directement l'objet de l'invention. Il s'agit de copolyamide et/ou de copolyester thermoplastique et/ou de dérivés chimiques de l'un d'eux ou des deux, seuls ou en combinaison avec d'autres copolymères thermoplastiques, thermodurcissables en dispersion aqueuse et/ou alcoolique et/ou autre solvant polaire, se présentant originellement et à température ambiante sous forme de pâte.The fusible material per se is not directly the subject of the invention. They are copolyamide and / or thermoplastic copolyester and / or chemical derivatives of one or both, alone or in combination with other thermoplastic copolymers, thermosetting in aqueous and / or alcoholic dispersion and / or other polar solvent, originally present at room temperature in the form of a paste.

Le procédé selon l'invention est du type par transfert, c'est à dire qu'on dépose d'abord sur un support de transfert 6 la matière thermocollante et, ensuite, on transfère la matière thermocollante depuis le support de transfert 6 sur le substrat 2.The process according to the invention is of the transfer type, that is to say that the heat-bonding material is first deposited on a transfer support 6 and then the heat-bonding material is transferred from the transfer support 6 to the substrate 2.

Le procédé selon l'invention est caractérisé par les perfectionnements consistant dans les étapes successives suivantes : on dépose d'abord sur le support de transfert 6 au moins partiellement anti-adhérent des gouttes 7 d'une dispersion de matière thermocollante. Puis, on chauffe les gouttes ainsi initialement déposées sur le support de transfert 6 en vue d'assurer le séchage de la dispersion déposée et la mise en fusion de la matière thermocollante qui la constitue. On met en contact, ensuite, les gouttes ainsi séchées se trouvant sur le support de transfert 6 et le substrat textile 2, sans chauffage dudit substrat textile 2, la matière thermocollante étant transférée du support de transfert 6 au substrat textile 2, sous forme de points, sans toutefois pénétrer à l'intérieur du substrat 2 du fait, d'une part, que la matière thermocollante adhère plus au substrat textile 2 qu'au support de transfert 6 et, d'autre part, qu'on réalise seulement un contact de la matière thermocollante avec le substrat textile 2 plutôt qu'un pressage du support de transfert 6 sur le substrat textile 2.The method according to the invention is characterized by the improvements consisting of the following successive steps: firstly drops on the transfer support 6 at least partially non-sticking drops 7 of a dispersion of fusible material. Then we heat the drops as well initially deposited on the transfer support 6 in order to ensure the drying of the dispersion deposited and the melting of the fusible material which constitutes it. The drops thus dried on the transfer support 6 and the textile substrate 2 are then brought into contact without heating said textile substrate 2, the fusible material being transferred from the transfer support 6 to the textile substrate 2, in the form of points, without however penetrating inside the substrate 2 because, on the one hand, that the fusible material adheres more to the textile substrate 2 than to the transfer support 6 and, on the other hand, that only a contact of the fusible material with the textile substrate 2 rather than pressing the transfer support 6 on the textile substrate 2.

Il est clair que l'expression "goutte" se réfère plus spécialement au cas d'un dépôt en point de forme circulaire. Toutefois, l'expression goutte recouvre aussi, au sens de la présente invention un dépôt plus au moins linéaire ou surfacique.It is clear that the expression "drop" refers more particularly to the case of a circular point deposit. However, the expression drop also covers, within the meaning of the present invention, a deposit which is more or less linear or surface.

De plus, on déplace le support de transfert 6 sur lequel ont été déposées et séchées les gouttes 7 de dispersion de matière thermocollante en synchronisme et côte à côte avec le substrat textile 2 et ce dans une zone de transfert à partir d'une zone de convergence cette zone de transfert étant, apte à réaliser le transfert des gouttes.In addition, the transfer support 6 is moved on which the drops 7 of dispersion of fusible material have been deposited and dried in synchronism and side by side with the textile substrate 2 and this in a transfer zone from a zone of convergence this transfer zone being able to carry out the transfer of the drops.

Dans la suite du texte on entend par zone de convergence la zone où le support 6 et le substrat 2 sont rapprochés l'un de l'autre, cette zone étant ponctuelle ou, du moins, de longueur limitée. On entend par zone de transfert une zone de longueur plus étendue à partir de la zone de convergence et vers l'aval où est réalisé effectivement le transfert.In the rest of the text, the term “convergence zone” means the zone where the support 6 and the substrate 2 are brought close to each other, this zone being punctual or, at least, of limited length. The term “transfer zone” is understood to mean a zone of more extended length from the convergence zone and downstream where the transfer is actually carried out.

Dans la zone de transfert, on maintient le support de transfert 6 écarté parallèlement et sans contact direct avec le substrat textile 2 et on régle l'écartement entre eux en fonction de l'épaisseur des gouttes déposées, afin, simultanément, d'assurer le transfert tout en évitant la pénétration du substrat textile 2 avec la matière thermocollante.In the transfer zone, the transfer support 6 is kept apart in parallel and without direct contact with the textile substrate 2 and the spacing between them is adjusted according to the thickness of the drops deposited, in order, simultaneously, to ensure the transfer while avoiding the penetration of the textile substrate 2 with the fusible material.

Enfin, on règle la matité des points de matière thermocollante sur le substrat textile 2 en fonction de la matité du support de transfert 6. En effet, selon la matité du support 6, on obtient des points 4 mats ou brillants. Ainsi en réglant la matité du support 6, on obtient des points 4 plus ou moins mats. Lorsque le support 6 est brillant, les points 4 sont brillants. En effet, un support anti-adhérent 6 est brillant lorsqu'il est lisse et sans aspérités. Lorsqu'on dépose des gouttes liquides 7 sur un tel support, la surface des gouttes solides après refroidissement est lisse. Au contraire, un support anti-adhérent 6 est mat lorsqu'il possède des aspérités et celles-ci se retrouvent sur les surfaces externes des gouttes solides après refroidissement.Finally, the mattness of the dots of fusible material on the textile substrate 2 is adjusted as a function of the dullness of the transfer support 6. Indeed, depending on the dullness of the support 6, dots 4 or glossy dots are obtained. Thus by adjusting the mattness of the support 6, one obtains more or less matt points 4. When the support 6 is shiny, the points 4 are shiny. Indeed, a non-stick support 6 is shiny when it is smooth and without roughness. When liquid drops 7 are deposited on such a support, the surface of the solid drops after cooling is smooth. On the contrary, a non-stick support 6 is matt when it has asperities and these are found on the external surfaces of the solid drops after cooling.

Le dépôt sur le support de transfert 6 est préférentiellement réalisé par sérigraphie ou héliographie plutôt que par raclage, la technique de dépôt n'étant pas, en soi, l'objet de la présente invention. Le support de transfert 6 est préférentiellement constitué par un tapis de tissus de verre revêtu d'un produit antiadhérent notamment à base de polytétrafluorethylène ou de silicone. L'emploi d'un tel support de transfert 6 antiadhérent plutôt que d'une simple bande métallique ou en papier seulement comme cela est le cas dans l'état de la technique est une des conditions favorisant le transfert de la matière thermocollante depuis le support 6 sur le substrat 2 par contact et non par pressage.The deposition on the transfer support 6 is preferably carried out by screen printing or heliography rather than by scraping, the deposition technique not being, per se, the object of the present invention. The transfer support 6 is preferably constituted by a mat of glass fabrics coated with a non-stick product, in particular based on polytetrafluorethylene or silicone. The use of such a non-stick transfer support 6 rather than a simple metal or paper strip only, as is the case in the prior art, is one of the conditions favoring the transfer of the fusible material from the support. 6 on the substrate 2 by contact and not by pressing.

On entend par "transfert par contact" un transfert de la matière thermocollante au moyen d'un support de transfert 6 et par contact de ladite matière thermocollante avec le substrat textile 2 mais sans contact direct entre le substrat textile 2 et le support de transfert 6. Cela explique donc le règlage d'écartement entre les substrat 2 et le support 6, au maximum à l'épaisseur des gouttes déposées et séchées, ainsi que mentionné précédemment (aux compensations pour les épaisseurs du substrat 2 et support 6 près)."Transfer by contact" is understood to mean a transfer of the heat-bonding material by means of a transfer support 6 and by contact of said heat-bonding material with the textile substrate 2 but without direct contact between the textile substrate 2 and the transfer support 6 This therefore explains the adjustment of the spacing between the substrate 2 and the support 6, at most to the thickness of the drops deposited and dried, as mentioned previously (with compensations for the thicknesses of the substrate 2 and support 6 close).

Dans la zone de transfert où intervient le transfert, le substrat textile 2 n'est pas chauffé, c'est-à-dire qu'il se trouve à température ambiante, n'ayant par ailleurs, pas été chauffé préalablement.In the transfer zone where the transfer takes place, the substrate textile 2 is not heated, that is to say that it is at ambient temperature, having moreover not been previously heated.

Postérieurement au transfert, on ne chauffe pas davantage le substrat textile 2 et, le cas échéant, on refroidit les points 4 de matière thermocollante se trouvant sur le substrat textile 2 (et par voie de conséquence le substrat 2 lui-même, en général) et ceci afin de les solidifier. En effet, cette solidification n'est pas encore réalisée puisque le transfert (zone de convergence) intervient immédiatement ou peu de temps après le séchage des gouttes 7 et la mise en fusion du ou des polymères composant les dites gouttes 7.After the transfer, the textile substrate 2 is not further heated and, if necessary, the dots 4 of fusible material on the textile substrate 2 are cooled (and consequently the substrate 2 itself, in general) and this in order to solidify them. Indeed, this solidification is not yet achieved since the transfer (convergence zone) occurs immediately or shortly after the drying of the drops 7 and the melting of the polymer or polymers making up said drops 7.

Eventuellement, dans la zone de convergence ou de transfert, on applique des forces réciproques, tendant au rapprochement, au substrat textile 2 et au support de transfert 6. Ces forces réciproques restent cependant limitées et ont comme seul objectif d'assurer un contact satisfaisant entre le substrat textile 2 et les seules gouttes 7 (mais non avec le support de transfert 6).Optionally, in the convergence or transfer zone, reciprocal forces are applied, tending to approach, to the textile substrate 2 and to the transfer support 6. These reciprocal forces remain limited, however, and have the sole objective of ensuring satisfactory contact between the textile substrate 2 and the only drops 7 (but not with the transfer support 6).

Egalement, éventuellement et si nécessaire et/ou possible, on effectue un apport de chaleur supplémentaire dans la zone de convergence. Un tel apport de chaleur vise à faciliter, pour autant que cela est nécessaire, le transfert. Toutefois, d'une part, cet apport de chaleur ne peut être substitué à l'apport de chaleur préalable concernant les gouttes 7 et ne vise pas leur séchage. De plus, si un tel apport de chaleur est souhaité, il concerne plutôt les gouttes 7 (éventuellement le support de transfert 6 par voie de conséquence) que le substrat textile 2. En général, un tel chauffage additionnel n'est necessaire que pour garder en fusion les polymères thermocollant à haut point de fusion et haute viscosité à l'état fondu.Also, possibly and if necessary and / or possible, an additional heat supply is made in the convergence zone. Such a supply of heat aims to facilitate, as far as necessary, the transfer. However, on the one hand, this heat supply cannot be substituted for the prior heat supply relating to the drops 7 and is not aimed at their drying. In addition, if such an addition of heat is desired, it relates more to the drops 7 (possibly the transfer medium 6 consequently) than to the textile substrate 2. In general, such additional heating is only necessary to keep in fusion the fusible polymers with high melting point and high viscosity in the molten state.

Dans la description qui précède ainsi que dans celle qui suit on utilise la même expression "goutte" 7 pour désigner le dépôt de matière thermocollante dans l'ensemble du cycle du procédé. Toutefois, outre la remarque déjà faite sur la notion de "goutte", il est entendu que la nature même de la goutte évolue lors du procédé passant notamment originellement de l'état pâteux à finalement l'état sec.In the preceding description as well as in that which follows, the same expression "drop" 7 is used to designate the deposition of fusible material throughout the cycle of the process. However, in addition to the remark already made on the notion of "gout", it is understood that the very nature of gout is changing during the process passing in particular originally from the pasty state to finally the dry state.

Une installation pour la mise en oeuvre du procédé comporte des premiers moyens d'entraînement 15 du substrat textile 2 et des seconds moyens d'entraînement 12 d'un support de transfert 6, au moins partiellement anti adhérent ainsi que, d'amont en aval et disposés successivement, des moyens 8, 10 pour déposer des gouttes d'une dispersion de matière thermocollante sur le support 6, des moyens de chauffage 14 des gouttes ainsi déposées, et des moyens de transfert 12, 15, 16, 17 des gouttes ainsi séchées depuis le support de transfert sur le substrat textile 2.An installation for implementing the method comprises first drive means 15 for the textile substrate 2 and second drive means 12 for a transfer support 6, at least partially non-stick as well as from upstream to downstream and arranged successively, means 8, 10 for depositing drops of a dispersion of fusible material on the support 6, heating means 14 for the drops thus deposited, and transfer means 12, 15, 16, 17 for the drops as well dried from the transfer medium on the textile substrate 2.

Les moyens de transfert de gouttes sont constitués par les premiers et seconds moyens d'entraînement 12, 15 agencés afin de fonctionner en synchronisme et de cylindres de calandrage ou équivalents 16, 17 légèrement écartés transversalement en vue de maintenir également le support de transfert 6 et le substrat textile 2 écartés et sans contact direct l'un avec l'autre, l'écartement entre eux étant réglé en fonction de l'épaisseur des gouttes déposées (et de l'épaisseur du substrat 2 et du support 6) notamment par des moyens de réglage agissant sur les cylindres de calandrage 16, 17.The drop transfer means consist of the first and second drive means 12, 15 arranged to operate in synchronism and of calendering cylinders or the like 16, 17 slightly spaced transversely so as to also maintain the transfer support 6 and the textile substrate 2 apart and without direct contact with each other, the spacing between them being adjusted as a function of the thickness of the drops deposited (and of the thickness of the substrate 2 and of the support 6) in particular by adjustment means acting on the calendering cylinders 16, 17.

Selon l'invention, les moyens de transfert 12, 15, 16, 17 sont dépourvus de moyens de pression directe réciproque du substrat textile 2 et du support de transfert 6 en vue d'assurer leur contact intime.According to the invention, the transfer means 12, 15, 16, 17 are devoid of means for direct reciprocal pressure of the textile substrate 2 and of the transfer support 6 in order to ensure their intimate contact.

Les moyens de transfert 12, 15, 16, 17 assurent une zone de transfert d'une certaine longueur apte à permettre le transfert des gouttes.The transfer means 12, 15, 16, 17 provide a transfer zone of a certain length capable of allowing the transfer of the drops.

Enfin, la zone de transfert est dépourvue de moyens de chauffage du substrat textile 2.Finally, the transfer zone is devoid of means for heating the textile substrate 2.

Les premiers moyens d'entraînement 15 sont constitués par exemple par l'un des cylindres de calandrage 16, 17 appartenant aux moyens de transfert, ce cylindre de calandrage étant entraîné en rotation par des moyens d'entraînement tels qu'un moteur.The first drive means 15 are constituted for example by one of the calendering cylinders 16, 17 belonging to the transfer means, this calendering cylinder being driven in rotation by drive means such as a motor.

Les seconds moyens d'entraînement 12 sont constitués, par exemple, par un cylindre d'entraînement placé en aval du dispositif, notamment après les cylindres de calandrage 16, 17 et à la fin de la zone de transfert.The second drive means 12 are constituted, for example, by a drive cylinder placed downstream of the device, in particular after the calendering cylinders 16, 17 and at the end of the transfer zone.

Les moyens 8, 10 pour déposer des gouttes, à l'état pâteux sur le support de transfert 6 anti adhérents comprennent, par exemple un cylindre 8 d'héliogravure ou de sérigraphie d'axe 9 et un cylindre de contrepartie plein 10, en regard, d'axe 11 parallèle, les deux cylindres 8, 10 étant en contact de part et d'autre du support de transfert 6. Ces deux cylindres 8, 10 sont placés essentiellement en amont du dispositif et tournent en sens opposés grâce à des moyens d'entraînement tels qu'un moteur. Ce moteur est associé au moteur des moyens d'entraînement 12 pour que, en amont et en aval, le support de transfer 6 se déplace à la même vitesse linéaire.The means 8, 10 for depositing drops, in the pasty state on the non-stick transfer support 6 comprise, for example a cylinder 8 of rotogravure or serigraphy of axis 9 and a full counterpart cylinder 10, opposite , of axis 11 parallel, the two cylinders 8, 10 being in contact on either side of the transfer support 6. These two cylinders 8, 10 are placed essentially upstream of the device and rotate in opposite directions by means such as an engine. This motor is associated with the motor of the drive means 12 so that, upstream and downstream, the transfer support 6 moves at the same linear speed.

Les moyens de chauffage 14 peuvent faire l'objet de nombreuses variantes d'éxécution. Il s'agit essentiellement de moyens de chauffage des gouttes 7 par rayonnement (exemple par infrarouge ou micro-ondes) ou encore par convection (air chaud) plutôt que par conduction et ceci compte tenu que le support de transfert 6 est, en soi, normalement peu ou faiblement conducteur de la chaleur.The heating means 14 can be the subject of numerous variant embodiments. These are essentially means for heating the drops 7 by radiation (for example by infrared or microwave) or even by convection (hot air) rather than by conduction and this taking into account that the transfer support 6 is, in itself, normally little or poorly conductive of heat.

Les moyens de chauffage 14 sont d'intensité variable (sur leur longueur) et s'étendent sur une longueur (donc compte tenu de la vitesse de défilement du support de transfert 6 sont actifs pendant une durée correspondante) telles que les gouttes 7 déposées par les cylindres 8, 10 sont successivement séchées puis que le polymère qui constitue la matière thermocollante soit en fusion au moins partiellement. Il est à observer que les moyens de chauffage 14 sont placés, normalement, sur un trajet linéaire du support de transfert 6 entre les cylindres de dépôt 8, 10 et les cylindres de calandrage 16, 17. Cette disposition permet de répartir les moyens de chauffage 14 sur la longueur de parcours désiré, sans remettre en cause l'architecture du dispositif, ce qui ne serait pas le cas si les moyens de chauffage étaient intégrés à un cylindre, la longueur du parcours étant alors fixe et limitée.The heating means 14 are of variable intensity (over their length) and extend over a length (therefore, taking into account the speed of travel of the transfer support 6 are active for a corresponding duration) such as the drops 7 deposited by the cylinders 8, 10 are successively dried then the polymer which constitutes the fusible material is at least partially molten. It should be observed that the heating means 14 are normally placed on a linear path of the transfer support 6 between the deposition cylinders 8, 10 and the calendering cylinders 16, 17. This arrangement makes it possible to distribute the heating means 14 over the desired path length, without jeopardizing the architecture of the device, this which would not be the case if the heating means were integrated into a cylinder, the length of the path then being fixed and limited.

Les moyens de chauffage 14 sont placés en aval, généralement à proximité des cylindres de dépôt 8, 10, pour éviter un trop grand encombrement de l'installation. En général, ils sont placés en amont des cylindres de calandrage 16, 17, suffisamment proches d'eux pour que les polymères thermocollants soient encore en fusion dans la zone de convergence tout en étant agencés pour ne pas chauffer indûment le substrat textile 2 arrivant sur le cylindre de calandrage 16.The heating means 14 are placed downstream, generally near the deposition cylinders 8, 10, in order to avoid too great a bulk of the installation. In general, they are placed upstream of the calendering cylinders 16, 17, close enough to them so that the fusible polymers are still in fusion in the convergence zone while being arranged so as not to unduly heat the textile substrate 2 arriving on the calendering cylinder 16.

Les cylindres de calandrage 16, 17 définissent la zone de convergence. Ces deux cylindres sont notamment identiques, de même rayon, lisses, d'axes parallèles, entraînés en sens opposés en synchronisme. Ils sont légèrement écartés transversalement l'un de l'autre, c'est à dire qu'ils ne sont pas tangents, naturellement, mais que leurs génératrices en regard, les plus proches, sont écartées l'une de l'autre et non en contact, cet écartement étant réglé en fonction de l'épaisseur des gouttes déposées par les cylindres de dépôt 8, 10. En particulier cet écartement est tel qu'il est au maximum égal à l'épaisseur des gouttes, aux épaisseurs du substrat 2 et du support 6 près. A cet effet, les axes des cylindres de calandrage 16, 17 peuvent être portés par deux paires de paliers d'écartement réciproque réglable. Des moyens de réglage tels que des vis sans fin ou autres permettent d'assurer le réglage de cet écartement. Des moyens de blocage tels que des écrous ou autres permettent de maintenir cet écartement fixe. Les moyens de réglage comportent, en général, des moyens de repérage de la valeur de l'écartement.The calendering cylinders 16, 17 define the convergence zone. These two cylinders are in particular identical, of the same radius, smooth, with parallel axes, driven in opposite directions in synchronism. They are slightly separated transversely from each other, that is to say that they are not tangent, of course, but that their generatrices opposite, the closest, are separated from each other and not in contact, this spacing being adjusted as a function of the thickness of the drops deposited by the deposition cylinders 8, 10. In particular this spacing is such that it is at most equal to the thickness of the drops, to the thicknesses of the substrate 2 and support 6 close. To this end, the axes of the calendering cylinders 16, 17 can be carried by two pairs of reciprocal adjustable spacing bearings. Adjustment means such as worms or the like make it possible to adjust this spacing. Locking means such as nuts or the like allow this fixed spacing to be maintained. The adjustment means generally comprise means for identifying the value of the spacing.

Des cylindres de renvoi ou de déviation ou similaires permettent de définir la fin de la zone de transfert et le début de la zone de divergence du substrat textile 2 et du support de transfert 6. Les cylindres de renvoi sont agencés de manière semblable aux cylindres de calandrage 16, 17 de manière à être écartés de manière comparable aux cylindres de calandrage 16, 17. Les cylindres de calandrage 16, 17 et les cylindres de renvoi sont écartés axialement d'une longueur définissant la longueur de la zone de transfert. Cette longueur est réglable, le cas échéant, les paliers des cylindres de calandrage et de renvoi étant agencés en conséquence. En toute occurence, cette longueur est telle que le polymère thermocollant ait le temps de se recristalliser pour qu'en fin de zone de transfert les gouttes 7 soient intégralement transférées du support 6 sur le substrat 2.Return or deflection cylinders or the like make it possible to define the end of the transfer zone and the start of the divergence zone of the textile substrate 2 and of the transfer support 6. The return cylinders are arranged in a similar manner to the return cylinders. calendering 16, 17 so as to be apart in a comparable manner to the calendering cylinders 16, 17. The calendering cylinders 16, 17 and the cylinders of reference are axially spaced apart by a length defining the length of the transfer zone. This length is adjustable, if necessary, the bearings of the calendering and deflection cylinders being arranged accordingly. In all cases, this length is such that the heat-bonding polymer has time to recrystallize so that at the end of the transfer zone the drops 7 are fully transferred from the support 6 to the substrate 2.

Le cas échéant, des moyens de pression légère et réciproque sont associés aux cylindres de calandrage 16, 17, respectivement aux cylindres de renvoi avec pour seule fonction d'assurer le maintien de l'écartement souhaité entre le substrat 2 et le support 6 et donc la qualité du transfert. Les moyens de pression légère visent donc essentiellement à s'assurer que le substrat 2 et le support 6 sont bien appliqués sur leur cylindre de calandrage respectif. Par contre et ainsi que cela a déjà été mentionné, de tels moyens de pression n'ont pas pour objectif d'assurer le contact direct avec pression entre les cylindres de calandrage ou de renvoi respectivement, un tel contact direct avec pression devant, au contraire, être évité.Where appropriate, light and reciprocal pressure means are associated with the calendering cylinders 16, 17, respectively with the return cylinders with the sole function of ensuring the maintenance of the desired spacing between the substrate 2 and the support 6 and therefore the quality of the transfer. The light pressure means therefore essentially aim to ensure that the substrate 2 and the support 6 are properly applied to their respective calendering cylinder. By cons and as has already been mentioned, such pressure means are not intended to ensure direct contact with pressure between the calendering or return cylinders respectively, such direct contact with pressure in front, on the contrary , be avoided.

Le cas échéant, et pour autant qu'il soit nécessaire et/ou possible, il est également prévu des moyens de chauffage additionels situés à la limite amont de la zone de convergence, destiné à chauffer essentiellement les gouttes 7. Toutefois, de tels moyens de chauffage additionnels ne peuvent remplacer les moyens de chauffage 14 et n'ont pas la même fonction que les moyens de chauffage 14. En général, de tels moyens de chauffage additionels ne sont nécessaires que pour maintenir les polymères en fusion jusqu'au moment du transfert. Cette variante n'est utile que pour les polymères à haut point de fusion et haute viscosité à l'état fondu.Where appropriate, and insofar as it is necessary and / or possible, additional heating means are also provided located at the upstream limit of the convergence zone, intended to essentially heat the drops 7. However, such means additional heating cannot replace the heating means 14 and do not have the same function as the heating means 14. In general, such additional heating means are only necessary to keep the polymers in fusion until the time of transfer. This variant is only useful for polymers with a high melting point and high viscosity in the molten state.

En aval des cylindres de renvoi, c'est à dire à la fin du dispositif, le substrat textile 2 et le support de transfert 6 sont écartés l'un de l'autre au moyen de cylindre de déviation ou similaire.Downstream of the return cylinders, that is to say at the end of the device, the textile substrate 2 and the transfer support 6 are separated from one another by means of deflection cylinder or the like.

Le substrat textile comportant les points 4 de matière thermocollante est par exemple enroulé en une bobine 18 en aval de la zone de transfert.The textile substrate comprising the dots 4 of heat-bonding material is, for example, wound in a reel 18 downstream of the transfer zone.

L'installation comporte également, et éventuellement, des moyens aptes à refroidir les points 4 de matière thermocollante une fois transférés sur le substrat textile 2, situés dans la zone de transfert en aval de la zone de convergence. En général, ces moyens sont constitués par l'air ambiant non chauffé dans lequel circule le substrat 2 avec les points 4 de matière thermocollante. En variante, ces moyens sont des moyens effectifs de refroidissement par production de froid tels que plaques de refroidissement dans lesquelles circule un fluide réfrigérant, plaques qui sont en contact direct avec le support de transfert et situés à l'opposé du substrat textile 2; ou tels qu'un caisson réfrigérant dans les parois duquel circule un liquide de refroidissement afin de maintenir une ambiance dans le dit caisson telle que l'ensemble support textile 2, points de nature thermocollante 7 et support anti-adhérant 6 soient placés à basse température et protégés de toute humidité de condensation intempestive. En général, ces moyens sont placés en amont de la bobine 18 pour que le textile 1 ne soit bobiné qu'une fois le produit transféré parfaitement stable.The installation also includes, and possibly, means capable of cooling the dots 4 of fusible material once transferred onto the textile substrate 2, located in the transfer zone downstream from the convergence zone. In general, these means are constituted by the unheated ambient air in which the substrate 2 circulates with the points 4 of fusible material. As a variant, these means are effective means of cooling by production of cold, such as cooling plates in which a cooling fluid circulates, plates which are in direct contact with the transfer support and located opposite the textile substrate 2; or such as a cooling box in the walls of which circulates a cooling liquid in order to maintain an atmosphere in said box such that the textile support assembly 2, heat-bonding points 7 and non-stick support 6 are placed at low temperature and protected from any unwanted condensation moisture. In general, these means are placed upstream of the spool 18 so that the textile 1 is only spooled once the product is transferred perfectly stable.

Selon une autre caractéristique de l'invention, l'installation ne comporte pas de moyens de chauffage du substrat textile 2 préalablement au transfert. En particulier, le cylindre de calandrage 16 sur lequel se trouve le substrat textile 2 n'est pas chauffé, et selon une variante de l'invention, peut être refroidi par circulation de liquide réfrigérant afin de figer le polymère en fusion dès son contact avec le textile 2.According to another characteristic of the invention, the installation does not include means for heating the textile substrate 2 before the transfer. In particular, the calendering cylinder 16 on which the textile substrate 2 is located is not heated, and according to a variant of the invention, can be cooled by circulation of coolant in order to freeze the molten polymer as soon as it comes into contact with textile 2.

Dans une première forme d'exécution (figure 1), l'installation fonctionne en discontinu, le support de transfert 6 s'étendant entre une bobine de stockage amont 13 placée en amont des cylindres de dépôt 8, 10 et une bobine de stockage aval placée en aval des cylindres de renvoi, notamment dans la région de la bobine de produit textile thermocollant 19. Lorsque la bobine de stockage amont 13 est vide, on lui substitue la bobine de stockage aval 19 et le cycle de fonctionnement peut recommencer.In a first embodiment (Figure 1), the installation operates discontinuously, the transfer support 6 extending between an upstream storage coil 13 placed upstream of the deposition cylinders 8, 10 and a downstream storage coil placed downstream of the return cylinders, in particular in the region of the reel of fusible textile product 19. When the upstream storage reel 13 is empty, it is replaced by the reel of downstream storage 19 and the operating cycle can start again.

Dans une second forme d'exécution (figure 2), l'installation fonctionne en continu, le support de transfert 6 est continu, sans fin, tendu par exemple entre trois cylindres 20, 21, 22 auxquels sont associés les seconds moyens d'entraînement. En particulier, le support de transfert 6 après passage entre les cylindres calandre 16, 17 passe sur un premier rouleau d'entraînement 20, sur un deuxième rouleau 21 placé entre le rouleau 20 et un troisième rouleau 22 en amont des cylindres de dépôt 8, 10. Sous le rouleau 21 est placée une brosse 23 qui permet de nettoyer la surface du support de transfert 6 des particules de points ou gouttes qui pourraient y subsister.In a second embodiment (Figure 2), the installation operates continuously, the transfer support 6 is continuous, endless, stretched for example between three cylinders 20, 21, 22 with which the second drive means are associated . In particular, the transfer support 6 after passage between the calender cylinders 16, 17 passes over a first drive roller 20, over a second roller 21 placed between the roller 20 and a third roller 22 upstream of the deposition cylinders 8, 10. Under the roller 21 is placed a brush 23 which makes it possible to clean the surface of the transfer support 6 from the particles of dots or drops which could remain there.

En fonctionnement, le support de transfert 6 et le substrat textile 2 sont, dans la partie principale de l'installation tendus et entraînés en synchronisme, notamment en continu à vitesse constante. Dans la zone de convergence où le substrat 2 et le support 6 sont en regard, ils sont écartés et parallèles l'un à l'autre, seules les gouttes 7 préalablement chauffées assurant entre eux un contact, le transfert étant réalisé du fait d'une adhésion relative de la matière thermocollante plus importante avec le substrat 2 qu'avec le support 6 anti adhérent.In operation, the transfer support 6 and the textile substrate 2 are, in the main part of the installation tensioned and driven in synchronism, in particular continuously at constant speed. In the convergence zone where the substrate 2 and the support 6 are opposite, they are spaced apart and parallel to each other, only the drops 7 previously heated ensuring contact between them, the transfer being carried out due to greater relative adhesion of the fusible material with the substrate 2 than with the non-stick support 6.

Claims (13)

1) Procédé de fabrication d'un produit textile thermocollant pour usage vestimentaire et constitué d'un substrat textile (2) comportant sur une de ses faces externes (3) de la matière thermocollante, procédé par transfert consistant à d'abord déposer sur un support de transfert (6) ladite matière thermocollante et à ensuite transférer la matière thermocollante depuis le support de transfert (6) sur le substrat (2), le procédé étant caractérisé par les perfectionnements consistant dans les étapes successives suivantes : on dépose d'abord sur le support de transfert (6) au moins partiellement anti-adhérent des gouttes (7) d'une dispersion de matière thermocollante; puis, on chauffe les gouttes ainsi initialement déposées sur le support de transfert (6) en vue d'assurer le séchage de la dispersion déposée et la fusion de la matière thermocollante qui la constitue; on met en contact, ensuite, les gouttes ainsi séchées se trouvant sur le support de transfert (6) et le substrat textile (2), sans chauffage dudit substrat textile (2), la matière thermocollante étant transférée du support de transfert (6) au substrat textile (2), sous forme de points, sans toutefois pénétrer à l'intérieur du substrat (2) du fait, d'une part, que la matière thermocollante adhère plus au substrat textile (2) qu'au support de transfert (6) et, d'autre part, qu'on réalise seulement un contact de la matière thermocollante avec le substrat textile (2) plutôt qu'un pressage du support de transfert (6) sur le substrat textile (2).1) Method for manufacturing a heat-bonding textile product for clothing use and consisting of a textile substrate (2) comprising on one of its external faces (3) heat-bonding material, transfer method consisting in first depositing on a transfer support (6) said thermo-adhesive material and then to transfer the thermo-adhesive material from the transfer support (6) to the substrate (2), the method being characterized by the improvements consisting of the following successive stages: first depositing on the transfer support (6) at least partially non-sticking drops (7) of a dispersion of fusible material; then, the drops thus initially deposited on the transfer support (6) are heated in order to ensure the drying of the dispersion deposited and the fusion of the fusible material which constitutes it; the drops thus dried being placed on the transfer support (6) and the textile substrate (2) are then brought into contact, without heating said textile substrate (2), the fusible material being transferred from the transfer support (6) to the textile substrate (2), in the form of dots, without however penetrating inside the substrate (2) due, on the one hand, to the fact that the fusible material adheres more to the textile substrate (2) than to the transfer support (6) and, on the other hand, that only a contact of the fusible material with the textile substrate (2) is made rather than a pressing of the transfer support (6) on the textile substrate (2). 2) Procédé de fabrication d'un produit textile thermocollant pour usage vestimentaire selon la revendication 1, caractérisé par le fait que l'on déplace le support de transfert (6) sur lequel ont été déposées et séchées les gouttes (7) de dispersion de matière thermocollante en synchronisme et côte à côte avec le substrat textile (2) et ce dans une zone de convergence apte à réaliser le transfert des gouttes.2) A method of manufacturing a fusible textile product for clothing use according to claim 1, characterized in that one moves the transfer support (6) on which have been deposited and dried the drops (7) of dispersion of fusible material in synchronism and side by side with the textile substrate (2) and this in a convergence zone capable of carrying out the transfer of the drops. 3) Procédé de fabrication d'un produit textile thermocollant pour usage vestimentaire selon la revendication 2, caractérisé par le fait que dans la zone de convergence, on maintient le support de transfert (6) écarté parallèlement et sans contact direct avec le substrat textile (2) et on règle l'écartement entre eux en fonction de l'épaisseur des gouttes déposées, afin simultanément d'assurer le transfert tout en évitant la pénétration du substrat textile (2) avec la matière thermocollante.3) Process for manufacturing a fusible textile product for clothing use according to claim 2, characterized by the fact that in the convergence zone, the transfer support (6) is kept apart in parallel and without direct contact with the textile substrate (2) and the spacing between them is adjusted as a function of the thickness of the drops deposited, in order to simultaneously ensure the transfer while avoiding the penetration of the textile substrate (2) with the fusible material. 4) Procédé de fabrication d'un produit textile thermocollant pour usage vestimentaire selon les revendications 1 à 3, caractérisé par le fait que l'on règle la matité des points de matière thermocollante sur le substrat textile (2) en fonction de la matité du support de transfert (6).4) A method of manufacturing a heat-bonding textile product for clothing use according to claims 1 to 3, characterized in that the mattness of the points of thermobonding material on the textile substrate (2) is adjusted as a function of the mattness of the transfer support (6). 5) Procédé de fabrication d'un produit textile thermocollant pour usage vestimentaire selon les revendications 1 à 4, caractérisé par le fait qu'on ne chauffe pas, préalablement au transfert, le substrat textile (2), notamment on utilise un substrat textile (2) à température ambiante.5) Method for manufacturing a fusible textile product for clothing use according to claims 1 to 4, characterized in that the textile substrate (2) is not heated, before transfer, in particular a textile substrate is used ( 2) at room temperature. 6) Procécé de fabrication d'un produit textile thermocollant pour usage vestimentaire selon les revendications 1 à 5, caractérisé par le fait que l'on refroidit, les points 4 de matière thermocollante dans la zone de transfert.6) Process for manufacturing a fusible textile product for clothing use according to claims 1 to 5, characterized in that the points 4 of fusible material are cooled in the transfer zone. 7) Produit textile thermocollant pour usage vestimentaire constitué d'un substrat textile (2) comportant sur une de ses faces externes (3) de la matière thermocollante, caractérisé par le fait qu'il est obtenu par le procédé selon l'une quelconque des revendications 1 à 6 et présente également comme caractéristiques d'une part que le substrat textile (2) peut être de type très sensible à la chaleur et, d'autre part, que la matière thermocollante reste à la surface du substrat textile (2) sans pénétrer à l'intérieur, dans l'épaisseur du substrat textile (2) indépendamment de la nature du textile employé.7) Iron-on textile product for clothing use consisting of a textile substrate (2) comprising on one of its external faces (3) of the iron-on material, characterized in that it is obtained by the process according to any one of Claims 1 to 6 and also has, on the one hand, characteristics that the textile substrate (2) can be of a very heat sensitive type and, on the other hand, that the fusible material remains on the surface of the textile substrate (2) without penetrating inside, in the thickness of the textile substrate (2) regardless of the nature of the textile used. 8) Produit textile thermocollant selon la revendication 7, caractérisé par le fait que la matière thermocollante est répartie en points dispersés sur la face externe (3) du substrat textile (2).8) fusible textile product according to claim 7, characterized in that the fusible material is distributed in scattered points on the external face (3) of the substrate textile (2). 9) Installation pour la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 6, caractérisée par le fait qu'elle comporte des premiers moyens d'entraînement (15) du substrat textile (2) et des seconds moyens d'entraînement (12) d'un support de transfert (6), au moins partiellement anti adhérent ainsi que, d'amont en aval et disposés successivement, des moyens (8, 10) pour déposer des gouttes d'une dispersion de matière thermocollante, les moyens de chauffage (14) des gouttes ainsi déposées, et des moyens de transfert (12, 15, 16, 17) des gouttes ainsi séchées depuis le support de transfert sur le substrat textile (2).9) Installation for implementing the method according to any one of claims 1 to 6, characterized in that it comprises first drive means (15) of the textile substrate (2) and second means of drive (12) of a transfer support (6), at least partially non-stick as well as, from upstream to downstream and successively arranged, means (8, 10) for depositing drops of a dispersion of heat-bonding material, the heating means (14) of the drops thus deposited, and transfer means (12, 15, 16, 17) of the drops thus dried from the transfer support on the textile substrate (2). 10) Installation selon la revendication 9, caractérisée par le fait que les moyens de transfert des gouttes sont constitués par les premiers et seconds moyens d'entraînement (12, 15) agencés afin de fonctionner en synchronisme et des cylindres de calandrage ou équivalents (16, 17) légèrement écartés transversalement en vue de maintenir également le support de transfert (6) et le substrat textile (2) écartés et sans contact direct l'un avec l'autre l'écartement entre eux étant réglé en fonction de l'épaisseur des gouttes déposées, notamment par des moyens de réglage agissant sur les cylindres de calandrage (16, 17).10) Installation according to claim 9, characterized in that the drop transfer means are constituted by the first and second drive means (12, 15) arranged to operate in synchronism and calendering cylinders or the like (16 , 17) slightly separated transversely in order to also maintain the transfer support (6) and the textile substrate (2) apart and without direct contact with each other, the spacing between them being adjusted according to the thickness drops deposited, in particular by adjustment means acting on the calendering cylinders (16, 17). 11) Installation selon la revendication 10, caractérisée par le fait que les moyens de transfert (12, 15, 16, 17) sont dépourvus de moyens de pression directe réciproque du substrat textile (2) et du support de transfert (6) en vue d'assurer leur contact intime.11) Installation according to claim 10, characterized in that the transfer means (12, 15, 16, 17) are devoid of means for direct reciprocal pressure of the textile substrate (2) and the transfer support (6) in view to ensure their intimate contact. 12) Installation selon l'une quelconque des revendications 9 et 10, caractérisé par le fait que les moyens de transfert (12, 15, 16, 17) assurent une zone de transfert d'une certaine longueur apte à permettre le transfert des gouttes.12) Installation according to any one of claims 9 and 10, characterized in that the transfer means (12, 15, 16, 17) provide a transfer area of a certain length capable of allowing the transfer of the drops. 13) Installation selon l'une quelconque des revendications 9 et 12, caractérisée par le fait que la zone de convergence est dépourvue de moyens de chauffage du substrat textile (2).13) Installation according to any one of claims 9 and 12, characterized in that the convergence zone is devoid of means for heating the textile substrate (2).
EP86401944A 1985-09-04 1986-09-04 Method and apparatus for the production of thermally adhesive textile materials Expired EP0219378B1 (en)

Priority Applications (1)

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AT86401944T ATE48857T1 (en) 1985-09-04 1986-09-04 METHOD AND DEVICE FOR THE MANUFACTURE OF TEXTILE THERMAL-ADHESIVE MATERIALS.

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Application Number Priority Date Filing Date Title
FR8513143A FR2586717B1 (en) 1985-09-04 1985-09-04 IMPROVED THERMAL ADHESIVE PRODUCT AND MANUFACTURING METHOD THEREOF
FR8513143 1985-09-04

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EP0219378A1 true EP0219378A1 (en) 1987-04-22
EP0219378B1 EP0219378B1 (en) 1989-12-20

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EP (1) EP0219378B1 (en)
JP (1) JPH0660467B2 (en)
AT (1) ATE48857T1 (en)
CA (1) CA1292151C (en)
DE (1) DE3667677D1 (en)
ES (1) ES2000894A6 (en)
FR (1) FR2586717B1 (en)

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US9205283B2 (en) 2011-03-21 2015-12-08 Coloright Ltd. Systems for custom coloration

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ATE48857T1 (en) 1990-01-15
ES2000894A6 (en) 1988-03-16
FR2586717B1 (en) 1988-03-18
FR2586717A1 (en) 1987-03-06
US5017418A (en) 1991-05-21
DE3667677D1 (en) 1990-01-25
JPS62117882A (en) 1987-05-29
CA1292151C (en) 1991-11-19
JPH0660467B2 (en) 1994-08-10
EP0219378B1 (en) 1989-12-20
US4906492A (en) 1990-03-06

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