WO1997030205A1 - Procede et dispositif de production de revetements non filmogenes a structure multicouche - Google Patents

Procede et dispositif de production de revetements non filmogenes a structure multicouche Download PDF

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Publication number
WO1997030205A1
WO1997030205A1 PCT/CH1997/000051 CH9700051W WO9730205A1 WO 1997030205 A1 WO1997030205 A1 WO 1997030205A1 CH 9700051 W CH9700051 W CH 9700051W WO 9730205 A1 WO9730205 A1 WO 9730205A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
substrate
powder
base
powdery material
Prior art date
Application number
PCT/CH1997/000051
Other languages
German (de)
English (en)
Inventor
Rudolf Nuessli
Original Assignee
Cavitec Ag
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 Cavitec Ag filed Critical Cavitec Ag
Publication of WO1997030205A1 publication Critical patent/WO1997030205A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
    • D06N3/0093—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin by applying resin powders; by sintering
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A41D27/02—Linings
    • A41D27/06—Stiffening-pieces

Definitions

  • the present invention relates to a method for the non-film-forming coating of a flat, web-forming, flexible base or a substrate with a multilayer structure of the coating, and to a device for the coating according to the invention.
  • the purpose of the multilayer coating structure is to combine favorable processing and technological properties for coating on the substrate with favorable material properties of the material applied to the first coating by combining two or more materials or material mixtures.
  • Material coated in this way Materials are used, for example, in the area of heat-sealable interlining fabrics for the clothing industry and in a wide range of technical textile applications.
  • Such two-layer, pattern-like or point-like or grid-like coatings on textile or non-textile interlining fabrics or reinforcing fabrics are known, as among others. described in DE-PS-22 14 236, DE-PS-22 31 723, EP-A-481 109 and DE-OS-23 51 405.
  • CH-PS-603 258 a system is described for applying a grid-like two-layer coating on a flat textile fiber web by applying and sintering the synthetic fiber powder synchronously onto the textile fiber web by means of two pressure engraving rollers in such a way that the two powder coatings are applied exactly on top of each other and stick to each other.
  • DE-OS-24 61 845 describes a further system by means of which a two-layer, raster-shaped coating is applied to a porous fabric, such as a textile interlining.
  • Two viscous coating compositions are successively stripped synchronously by means of doctor blades through a wall-shaped matrix lying on top of the interlining material, the amounts of the two materials being influenced by the size of the passage gap and the position of the doctor blade.
  • a so-called colon is formed, that is to say a dot-shaped coating, comprising a lower first coating compound lying on the textile fabric and a second coating compound covering the first compound.
  • DE-PS 25 36 911 again describes a method and a device for producing such a colon, in which two powders are deposited one above the other in the engraving depressions of an engraving roller by means of two doctor blades, which points are then transferred to a textile fabric.
  • the angle of attack occupied by the two doctor blades is essential.
  • the great disadvantage of all the devices and methods for producing patterned or punctiform two-layer coatings described in the prior art is that the two coating materials have to be deposited on the substrate exactly synchronously with one another in accordance with the pattern to be formed. If the two elements, each delivering a material, are not arranged exactly synchronously or do not match exactly, the two layers are not deposited one on top of the other and the coating is worthless. It has also been shown that the proposed solutions can hardly be implemented in practice.
  • DE-OS 20 61 173 it is proposed to first apply a punctiform arrangement of a plastic adhesive to a textile substrate, in accordance with a pattern, and if necessary to solidify it by means of sintering. Instead of a second point to be applied synchronously, a nonwoven adhesive is now sprayed onto the base, which of course completely covers the textile substrate with the point-like coating. This in turn creates a so-called double adhesive, although there is a total of a punctiform and a sheet-like adhesive, which on the one hand creates areas where only one adhesive is present and which requires a much larger amount of adhesive of the adhesive applied to the surface.
  • a further possibility is that a second coating is carried out by sprinkling on a powder onto a first point-shaped or grid-shaped coating, consisting of a pasty material, the powder directly affecting the point generally sticking, while that in the Powder deposited in between can then be suctioned off again, whereupon the adhesive powder is finally firmly connected to the first coating by means of sintering.
  • the powder spreading device is designed in such a way that the entire surface of the web of material is uniformly covered in length and width with a thin layer of powder. The powder particles adhere to the pre-coated surfaces, while they can either partially fall off due to gravity from non-pre-coated areas of the web or can be sucked off by means of an air stream.
  • a disadvantage of this type of coating is that either the paste-like first layer has to be dried before the application of the powdery second layer, which means that the powder hardly adheres anymore, or that the paste-like first layer after the application of the second powdery layer Layer must be dried because the paste contains water or a solvent. According to the latter variant in particular, however, the drying process also affects the second powder coating - it becomes irregular and there is also the risk of the second layer being removed from the side directly on the surface. It is also difficult to suck off the powder particles lying between the adhesion points without not impairing or damaging the first still pasty coating.
  • the first coating corresponding to a regular or irregular pattern, comprising either a sintered powder or an at least almost solvent-free so-called hot-melt material
  • a second coating step another powdery material by means of scattering or preferably a forced flow towards the base or substrate is applied in such a way that the further powdery material at least partially covers the still sticky hotmelt material or the sintered powder adhering to it.
  • the further powder or powder particles in an accelerated air stream with high kinetic energy on the precoated surface, high initial adhesion can be achieved, making the second coating more uniform overall than when applying the powder only by means of a scattering device.
  • the process therefore offers a possibility for improving the quality of multilayered pattern-coated materials and, by means of the reduced amount of secondary coating material which is unintentionally left on the substrate or the first coating, allows savings in material costs.
  • the substrate or the base is deflected via deflecting means in such a way that the first coating is directed downward, whereupon in a second step the further powder is applied from below by means of a flow forced against the base or the substrate or by means of vortex sintering.
  • the advantage of this method is that a large part of the material striking between the grid-like or pattern-like first coating does not adhere and immediately falls off and can therefore easily be collected and used again.
  • the base is deflected via deflecting means in such a way that the double coating is directed downward, whereupon the non-stick powder is knocked off.
  • impact device arranged on the side opposite the coating, is loosened and removed and additionally by means of a if on the side of the substrate or the substrate opposite the coating, a blower or a blowing device is blown away by means of a gas or air flow generated by the substrate or by the substrate, in order to suitably and Way to be caught.
  • the further powder has a grain size distribution in a range from approximately 0 to approximately 500 ⁇ m.
  • Preferred fractions for the further powder are the following ranges: 0-80 ⁇ , 80-200 ⁇ , 80-300 ⁇ and 125-500 ⁇ .
  • the grain size distributions or fractions used depend on the applications and the stated fraction sizes are particularly suitable for textile applications.
  • grain size distributions can also be selected, which have a range> - than 500 ⁇ .
  • FIG. 1 schematically shows a conventional coating system for generating a so-called double point, taking into account the respective point pattern of the generated maneuvering;
  • Fig. 2 shows schematically, an inventive
  • FIG. 3 shows a further embodiment variant of a coating installation according to the invention.
  • FIG. 4 schematically shows a further preferred embodiment variant of a coating installation according to the invention for producing a so-called double dot.
  • FIG. 1 schematically shows a conventional coating system known from the prior art, along which a substrate 1, such as, for example, an interlining material or a nonwoven, is coated with a so-called colon, for example in accordance with a pattern in the form of a grid or pattern.
  • a substrate 1 such as, for example, an interlining material or a nonwoven
  • the substrate 1 is first fed via a deflection roller 3 to a first coating device, which can be a paste printing machine, for example.
  • a paste printing machine consists of a transport roller 4, a screen printing roller 6 and a paste coating device 5.
  • the paste dots 9 thus produced on the substrate 1 are clearly visible. matically represented in section below the paste printing machine.
  • the substrate is fed via a further transport roller 11 to a second coating system, such as, for example, a scattering machine 21, comprising a powder supply 23 and a scattering device 25.
  • a scattering machine 21 comprising a powder supply 23 and a scattering device 25.
  • the scattered powder 27 forms a continuous powder layer, as shown schematically in section below the scattering machine 21. Both the paste points 9 and the intermediate spaces on the substrate are covered by the scattered powder 27.
  • the substrate is then fed to a suction device 31, where a negative pressure or suction flow is generated by means of a suction mechanism 35, whereupon the powder not adhering to the substrate or the first coating is suctioned off via a suction nozzle 37.
  • the coating thus formed is again shown schematically in section below the suction device 31, the interspaces between the individual points now being freed from the powder.
  • the tape or substrate 1 is then guided along a heat source, such as an infrared ray 41, as a result of which the powdery coating 27a is sintered onto the paste point 9.
  • a heat source such as an infrared ray 41
  • the transport then takes place through a dryer device 51, such as, for example, a circulating air nozzle dryer, where circulating air 53 is fed onto the substrate via fans.
  • a dryer device 51 such as, for example, a circulating air nozzle dryer
  • the now final colon is again shown schematically, comprising on the one hand the first coating 9, such as the paste point, and the second coating 27b sintered thereon.
  • the substrate or the coated web is fed to a calender 61, followed by cooling along a cooling roll 71. Finally, the coated substrate can be wound up.
  • FIG. 2 schematically shows an embodiment variant of a coating system according to the invention, also suitable for generating a so-called colon.
  • a substrate 2 or a base 1 is guided from a processing unit 2 via deflection rollers 3 to a first coating unit, such as an engraving printing machine, consisting of a support roller 4, engraving roller 7 and a hot melt entry unit 5 the pattern or grid-shaped coating 9 is fed along an infrared oven 12 to a second coating unit, such as a scattering machine 21, analogously to the scattering machine in FIG. 1.
  • a first coating unit such as an engraving printing machine, consisting of a support roller 4, engraving roller 7 and a hot melt entry unit 5
  • the pattern or grid-shaped coating 9 is fed along an infrared oven 12 to a second coating unit, such as a scattering machine 21, analogously to the scattering machine in FIG. 1.
  • the substrate or the base 1 is then deflected via a deflection roller 3 by a little more than 90 ° to a suction device 31, in which case the blower or an air flow unit 33 is preferably arranged on the side opposite the coating on the substrate which an air flow is generated through the substrate or the substrate.
  • the excess powder is not only sucked off from the substrate, but is blown away by means of the air stream, the excess powder being collected in a collecting space 35 in order to be removed via an intake nozzle 37.
  • a suction device can also be provided instead of a blower; simply by deflecting by more than 90 °, a more efficient removal of the excess powder is already made possible.
  • knocking devices 32 are provided on the surface of the base or the substrate opposite the coating, which are formed, for example, by square, triangular or similar rollers which periodically knock or knock against the base by turning, which additionally prevents this from occurring on the hot melt or the powder retained in the sintered powder is additionally loosened.
  • the double coating produced in this way is guided along an infrared beam 41 in a manner analogous to the embodiment in FIG. 1, in order, for example, to be fed to a chill roll via a calender.
  • the essence of the embodiment according to FIG. 2 lies in the fact that the excess powder that results from the second coating on the scattering machine 21 is either suctioned off or blown away "behind" the substrate by a blower.
  • the advantage of this arrangement is that the powder adhering to the non-pre-coated areas on the substrate or the base is largely completely removed.
  • the knocking devices 32 which are preferably arranged in the suction device 31, can of course be any devices which knock or knock periodically against the base.
  • FIG. 3 schematically shows a further embodiment variant of a coating installation according to the invention for generating a so-called colon.
  • a first coating point is generated analogously to the explanations in FIGS. 1 and 2.
  • the substrate or the base is then deflected via the transport roller 4 in such a way that the coating or the individual coating points 9 are directed downward.
  • the so-called colon is then generated on an infrared oven 12, for example, in order to at least melt the hot-melt material, in a second coating unit 21, which is an electrostatic powder application device.
  • a powder supply 22 is driven against the substrate or the base by means of an electrode 24 and an earthed steel plate 26, the second powder layer again adhering to the first point 9.
  • Any powder material adhering in the spaces between the points on the substrate is removed in a downstream blow-off device, where an air flow is generated through the substrate or the substrate by means of a fan 33 through a perforated roller 32. blown powder is collected in a collecting space 35 in order to be led away via an intake port 37.
  • FIG. 4 schematically shows a further embodiment variant of a coating system designed according to the invention, which in turn is suitable for generating a so-called double point.
  • a powder spraying device 28 is provided in a second coating unit 21 downstream of an oven 12, for the application of the further powder to the substrate 1, for the production of the second coating.
  • This can be a spray gun, for example, by means of which the powder is driven against the substrate at a preferably increased speed.
  • the substrate, comprising the second coating is now supplied in the same unit to a blow-off nozzle system 33, with which this unit simultaneously serves as a blow-off unit 31 for removing the excess powder.
  • blow-off nozzle system 33 By means of the blow-off nozzle system 33, an air flow is generated through the substrate, as a result of which the excess, non-adhesive powder is discharged via an exhaust air space 35 and an intake nozzle 37 in order to be fed to a powder station 91.
  • the blown-off powder is first cleaned in a filter device 92 in order to be fed via a sieve device 93 to a collecting device with pump 94. From this, metering into the powder takes place via a line 95, which is used to produce the second coating by means of the powder Spray device 28 is used. In this way, it is possible to carry out the second coating by means of a powder in a closed circuit, which solves the problem of dust development and, moreover, practically 100 percent utilization of the powder used can be achieved.
  • the subsequent treatment of the double coating produced takes place in an analogous manner, as already mentioned with reference to FIGS. 1-3.
  • the finally coated and treated substrate 1, comprising the colon 9 / 27b, is deposited on a development 81.
  • the embodiment variants of a coating device according to the invention for generating a colon shown in FIGS. 2-4 according to the invention are of course only examples that can be modified, modified or supplemented in any way. It is particularly irrelevant how the coating takes place in the first coating station.
  • a solvent-free hot melt material such as a thermoplastic material consisting of polyethylene, polyester, polyurethane, polyamide, PVC, etc.
  • the first coating can also be in powder form by means of an engraved roller, in which case the so generated first powder point has to be sintered in order to then be coated in a second powdery material.
  • thermosetting material for example, thermosetting material, thermosetting material, thermosetting material, thermosetting material, thermosetting material, etc., thermosetting material, etc.
  • the second powder coating can be sintered in any suitable manner, such as by means of the illustrated infrared radiator or also by means of other suitable heating devices.
  • the further powder can also be an at least partially crosslinkable thermoset, which can also be crosslinked by means of infrared, UV, microwaves, ultrasound and the like.
  • the present invention is also not limited to those cases where the first coating takes place in a punctiform manner, as illustrated with reference to FIGS. 1-4.
  • the first coating can also be a mesh-like coating or a flake-like coating, for example produced by means of hot-melt adhesive fibers.
  • the base or the substrate is a textile or non-textile material, so instead of a fabric-like material there is also the coating of a lamella-like material, such as a carbon fiber reinforced polyamide or polyester - Or polyurethane slat conceivable, as it is used in particular in the construction industry.
  • a lamella-like material such as a carbon fiber reinforced polyamide or polyester - Or polyurethane slat conceivable, as it is used in particular in the construction industry.
  • the first non-fuming, a regular or an irregular pattern structure-forming coating is carried out by means of a thermally softenable powder or an at least almost solvent-free hot melt material, and that the coating is carried out in the second coating step of the further powder is carried out in such a way that the powder, preferably in a forced flow onto the substrate or the substrate, respectively. on the first non-film-forming coating.
  • a sprinkling of the further powder on the first coating is of course not excluded and must be are also to be regarded as falling within the scope of protection of the present invention.
  • a further feature essential to the invention is that the substrate provided with a first coating is guided around a deflection roller in such a way that the first coating is directed downward, and the coating by means of the second medium, such as using a powder, from below.
  • a third feature of the invention which is also possibly independent of the two above-mentioned features, consists in that excess powder is removed by blowing off after the second coating has taken place, the blowing device or the blower being arranged on that side of the base or the substrate which is arranged opposite to the first coating with respect to the substrate. An air flow is thus generated through the substrate or the base.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Dans un procédé d'application non filmogène d'un revêtement à structure multicouche sur une base plane, souple et formant une bande, ou sur un substrat (1), on applique, dans une première étape, une première couche de revêtement (9) selon un motif régulier ou irrégulier au moyen d'une poudre ou d'un matériau thermofusible au moins sensiblement exempt de solvant. On fait ensuite fondre au moins partiellement le matériau sous l'effet de la chaleur. Dans au moins une deuxième étape, on applique un autre matériau pulvérulent (27) en utilisant un flux de préférence forcé en direction de la base ou du substrat (1), de sorte que l'autre matériau pulvérulent recouvre au moins partiellement le matériau en fusion ou la poudre frittée et adhère à celui-ci ou à celle-ci.
PCT/CH1997/000051 1996-02-14 1997-02-14 Procede et dispositif de production de revetements non filmogenes a structure multicouche WO1997030205A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH382/96 1996-02-14
CH38296 1996-02-14

Publications (1)

Publication Number Publication Date
WO1997030205A1 true WO1997030205A1 (fr) 1997-08-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1045015A2 (fr) * 1999-04-13 2000-10-18 Firma Carl Freudenberg Feuille adhésive ayant une couche adhésive segmentée et son procédé de fabrication
DE102009004786A1 (de) * 2009-01-13 2010-07-15 Fleissner Gmbh Verfahren und Vorrichtung zur Verfestigung von textilem Material
WO2017151268A1 (fr) * 2016-03-01 2017-09-08 Talon Technologies, Inc. Système multi-alimentation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2231723A1 (de) * 1972-03-23 1974-01-17 Kufner Textilwerke Kg Verfahren zur herstellung einer rasterfoermigen beschichtung aus heissiegelklebern auf flaechengebilden
FR2346058A1 (fr) * 1976-03-31 1977-10-28 Caratsch Hans Peter Procede et dispositif de realisation d'une impregnation par points formant reseau d'un materiau en bande a partir d'une poudre de resine synthetique
EP0657572A1 (fr) * 1993-12-08 1995-06-14 TEXIL S.p.A. Procédé pour la production des produits tissés/non-tissés thermocollants, notamment pour des doublures comportant des points thermofusibles aux températures différentes et une installation permettant la mise en oeuvre du procédé
EP0675183A1 (fr) * 1994-03-30 1995-10-04 KUFNER TEXTILWERKE GmbH Procédé pour le revêtement sous forme de trames de surfaces flexibles avec colles fusibles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2231723A1 (de) * 1972-03-23 1974-01-17 Kufner Textilwerke Kg Verfahren zur herstellung einer rasterfoermigen beschichtung aus heissiegelklebern auf flaechengebilden
FR2346058A1 (fr) * 1976-03-31 1977-10-28 Caratsch Hans Peter Procede et dispositif de realisation d'une impregnation par points formant reseau d'un materiau en bande a partir d'une poudre de resine synthetique
EP0657572A1 (fr) * 1993-12-08 1995-06-14 TEXIL S.p.A. Procédé pour la production des produits tissés/non-tissés thermocollants, notamment pour des doublures comportant des points thermofusibles aux températures différentes et une installation permettant la mise en oeuvre du procédé
EP0675183A1 (fr) * 1994-03-30 1995-10-04 KUFNER TEXTILWERKE GmbH Procédé pour le revêtement sous forme de trames de surfaces flexibles avec colles fusibles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1045015A2 (fr) * 1999-04-13 2000-10-18 Firma Carl Freudenberg Feuille adhésive ayant une couche adhésive segmentée et son procédé de fabrication
TR200000967A2 (tr) * 1999-04-13 2000-11-21 Carl Freudenberg Yüzeyinde kesintili olarak uygulanmış reaktif tutucu madde bulunan folyo ve bu folyonun üretimi için yöntem.
TR200000967A3 (tr) * 1999-04-13 2000-11-21 Carl Freudenberg Yüzeyinde kesintili olarak uygulanmis reaktif tutucu madde bulunan folyo ve bu folyonun üretimi için yöntem.
EP1045015A3 (fr) * 1999-04-13 2000-12-13 Firma Carl Freudenberg Feuille adhésive ayant une couche adhésive segmentée et son procédé de fabrication
DE102009004786A1 (de) * 2009-01-13 2010-07-15 Fleissner Gmbh Verfahren und Vorrichtung zur Verfestigung von textilem Material
WO2017151268A1 (fr) * 2016-03-01 2017-09-08 Talon Technologies, Inc. Système multi-alimentation
CN108601414A (zh) * 2016-03-01 2018-09-28 泰龙技术股份有限公司 多线路进给系统
US10220601B2 (en) 2016-03-01 2019-03-05 Talon Technologies, Inc. Multi-feed system

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