EP1929079B1 - Verfahren und vorrichtung zum auftragen von klebstofffäden und -punkten auf ein substrat sowie ein klebstofffadenflies und eine klebstofffadenschicht aufweisende materialbahn sowie daraus erzeugte produkte - Google Patents

Verfahren und vorrichtung zum auftragen von klebstofffäden und -punkten auf ein substrat sowie ein klebstofffadenflies und eine klebstofffadenschicht aufweisende materialbahn sowie daraus erzeugte produkte Download PDF

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Publication number
EP1929079B1
EP1929079B1 EP06805840A EP06805840A EP1929079B1 EP 1929079 B1 EP1929079 B1 EP 1929079B1 EP 06805840 A EP06805840 A EP 06805840A EP 06805840 A EP06805840 A EP 06805840A EP 1929079 B1 EP1929079 B1 EP 1929079B1
Authority
EP
European Patent Office
Prior art keywords
adhesive
threads
substrate
application
web
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.)
Active
Application number
EP06805840A
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German (de)
English (en)
French (fr)
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EP1929079A2 (de
Inventor
Michael Brune
Josef Rothen
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.)
Illinois Tool Works Inc
Original Assignee
"INATEC Innovative Auftragstechnologie" GmbH
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
Priority claimed from DE200520015267 external-priority patent/DE202005015267U1/de
Application filed by "INATEC Innovative Auftragstechnologie" GmbH filed Critical "INATEC Innovative Auftragstechnologie" GmbH
Publication of EP1929079A2 publication Critical patent/EP1929079A2/de
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Publication of EP1929079B1 publication Critical patent/EP1929079B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/05—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in another pattern, e.g. zig-zag, sinusoidal

Definitions

  • the invention relates to a method and a device for applying adhesive threads to a substrate and to various types of use of adhesive thread tiles or adhesive thread layers produced by the method.
  • Such nonwovens and layers are commonly used in a variety of technical fields, e.g. when fixing powdery substances on a substrate, such as a filter paper or cloth, in the rock wool coating, in hygiene products, such as diapers and bandages, in textile lamination, in carpet coatings, as anti-slip, in the paper bonding such as kitchen, toilet or napkin paper and many others more.
  • the US 4,898,634 describes a method and apparatus for spinning plastic fibers. Immediately after leaving the still liquid plastic from the rotating spinnerets, the filaments are cooled before coming into contact with a processing device. The thread formation takes place solely on the basis of the pressure generated by an extruder or an additional pump. Centrifugal forces form at most a subordinate role for the spinning of the threads. Fiber strands or yarns are primarily produced with the aid of a suitable fiber take-up system. For cooling and at least surface hardening of the staple fibers of the extrudate and for directing the plastic fibers onto the fiber receiving system, an air nozzle ring arranged in a circle around the spinning head is provided.
  • the spreader can produce a tubular fibrous structure by dispensing with a necking path and compressing the widely held fiber "tube" to a narrow sliver at the end of the broaching distance ,
  • the FR 2 847 178 refers to a crawler-type adhesive application in which a single bead of adhesive is delivered downwardly from an extruder, the exit point from the extruder moving along a circular path.
  • the free-falling bead of adhesive which forms in this way in a spiral shape is precisely measured.
  • From the EP 0 453 819 A1 is a method for producing Feinstmaschinevliesen of thermoplastic polymers, in which the centrifugally ejected from a rotary head under centrifugal force not yet solidified Feinstmaschinen with small radial distance from the rotary head by annularly arranged around the rotary head air nozzles are deflected by 90 ° under the influence of the exiting cooling air , Within the outlet of the spinnerets are located parallel to the spinning head rotation axis extended further air channels through which preheated air is injected at a temperature equal to or greater than the Spinndüsenkopftemperatur in the Feinstmaschineströmungsfeld.
  • the fiber strands discharged vertically downwards from a nozzle can be deflected by circular movement of the discharge nozzle or by air currents or electromagnetic fields directed across the spun fiber strands into an approximately circular path, wherein the forming fiber strand is stretched, so that the strength increases.
  • the JP 2004 255 293 A shows the features of the preamble of claims 1 and 5.
  • the invention has for its object to further develop the application of adhesive threads on a substrate to the effect that an improved order without the use of spray air is achieved, and the use of so applied adhesive fleece and adhesive layers.
  • the invention is based on allowing multiple adhesive applicator nozzles to rotate on a circulation path, so that act selectively predetermined Fliea mechanism on the exiting adhesive thread without the application of disturbing air spray and thus to allow the production of a relatively precisely predetermined adhesive thread pattern on the substrate. Based on this technical concept, it is now possible in many different ways to vary the adhesive application on the substrate in a targeted manner.
  • the main parameters of this change are: the number of revolutions of the applicator head, the delivery pressure in the applicator head, the nozzle cross section, the number of nozzles provided on the applicator head, the ejection angle between the axis of rotation of the exit head and the nozzle axis, the radial distance of the outlet of the outlet nozzle from the axis of rotation axial length of the adhesive supply channel between the Klebstoffbeetzungsventil and the axial position of the adhesive outlet nozzle, but also material parameters of the adhesive including its toughness, its melting point and the adhesive temperature in the region of the outlet nozzle.
  • the stretching possibilities of an adhesive thread thus also depend on the properties of the adhesive, the u. a. affect the internal cohesion of the adhesive thread, from. When the latter becomes very small, the adhesive thread breaks apart into more or less short sections, which can also be in the form of dots. For the purposes of this invention, the juxtaposition of such thread sections is also understood as an "adhesive thread".
  • Preferred pressures on the adhesive in the region of the adhesive supply unit or the adhesive supply channel are between about 10 and 200 bar, more preferably between 25 and 180 bar.
  • Increasing the speed of the gun increases the job diameter and affects the applied basis weight of adhesive.
  • the latter is also dependent on the relative speed between the rotating applicator head and the substrate in the radial direction relative to the axis of rotation.
  • the higher the relative speed the lower the basis weight and the coarser the thread pattern.
  • by a relatively higher speed of the adhesive thread after exiting the outlet nozzle is increasingly stretched.
  • the monofilament can be given a very small diameter and therefore contains less adhesive mass.
  • a particularly fine adhesive distribution is possible despite low or moderate basis weight.
  • Typical speeds of the application head are between 100 and 10,000 revolutions per minute.
  • a preferred speed range is between 400 and about 5000 revolutions per minute.
  • the cross sections of the at least one adhesive supply channel in the gun are chosen as large as possible, if the largest possible centrifugal forces are desired. These increase with increasing moving mass of the adhesive in the adhesive supply channel.
  • Preferred nozzle cross sections are between about 0.2 and 2.0 millimeters.
  • smaller calibrated nozzles result in larger application weights because of the higher pressure required.
  • a lower material pressure is required. This achieves the unexpected effect that a large nozzle (with a diameter of about 1 millimeter) leads to a very good thread draw and thus a lower thread weight per thread length unit is achieved.
  • Lower pressures also mean lower operating costs.
  • the stretching possibility is lower.
  • the application width for the smaller nozzles under the correspondingly higher pressure is greater than for larger nozzles with smaller pressures. If several nozzles with different passage are arranged on the same circumference of the applicator head, this leads to a thread pattern with different application widths of the adhesive threads coming from different nozzles.
  • the application head If at least the application head, but if possible also its peripheral devices, is / are heated, this can influence the flow behavior of the adhesive in the adhesive supply channel.
  • a contactless heating of the directly leading to the adhesive outlet nozzles sections of the adhesive supply channel e.g. Infrared emitters are used, which in turn need not necessarily rotate with the gun.
  • the plate rear side offers a good possibility of allowing considerable amounts of heat to act on the adhesive in the adhesive supply channel.
  • a highly heated radiator without physical contact with the rotating part of the application head can heat it without contact.
  • An air gap remaining between this heating element and the rotating part of the applicator head can be kept free of impurities by actively blowing in a fluid such as air.
  • the application head is moved relative to a Unterläge.
  • the applicator head remains in a predetermined position and a distance running under him endless belt, which is guided between two guide rollers, receives the adhesive thread layer and transports them to a transfer point on.
  • the conveyor belt itself as a substrate and to apply only the adhesive thread layer.
  • the adhesive thread layer can surprisingly be lifted after a cooling distance from the conveyor belt and handled as an independent adhesive thread fleece, for example, wound or further processed.
  • the adhesive thread layer is more or less porous, whereby the porosity as well as the pattern of the application can be predetermined by means of the process parameters and the design of the application head.
  • the conveyor belt also has the function of defining a cooling path for the adhesive thread layer or the adhesive thread fleece. This can be done with and without active cooling.
  • the grammage can be set within very wide limits, with 1 gram per square meter 2 corresponding approximately to a film thickness of 1 ⁇ m.
  • the invention achieves, inter alia, that the order edges of the adhesive are relatively sharp, and are supplied comparatively well with adhesive, because the threads lie in or approximately parallel to the working direction (relative movement direction between the substrate and gun) over each other. In certain cases, this can lead to a certain oversupply at the web edges with adhesive.
  • Such oversupply may be avoided, for example, by providing a plurality of nozzles at the exit head and differentiating the arrangement of these nozzles, in such a manner that a portion of the nozzles becomes different (compared to the remaining nozzles) Adhesive application width lead.
  • the ejection angle can also be used for this purpose. This can in principle also be 0 °, ie that the axis of the outlet nozzle is parallel to the axis of rotation. Even negative ejection angles are possible, ie the nozzle axis is directed back to the axis of rotation.
  • the ejection angles are preferably 15 ° and more in the radially outward direction. Even large ejection angles of eg 90 ° are possible. However, then the order images are less sharp at the edges.
  • Plate or disk-shaped application heads have proven particularly useful. This u. a. because they produce relatively little air movement that could affect the thread flight. Even in the gun order recessed nozzles promote this goal.
  • FIGS. 1 to 3 there is a compact device for applying adhesive threads from a drive motor 12 (in FIG. 3 omitted), a gear 14, a heating unit 16, a rotatable applicator head 18, an adhesive supply unit 20 and a valve assembly 22 for applying adhesive to the adhesive applicator head, such as hot glue or cold glue.
  • the drive motor 12 via support means 13, such as a base plate 13A and supports or spacers 13B held on the housing top side of the adhesive supply unit 20, over which the base plate 13A protrudes laterally.
  • the drive shaft 15 connected to the drive motor 12 drive shaft 15 can be guided on the adhesive supply unit 20 laterally to the transmission 14.
  • the gear 14 screwed to a side wall of the adhesive supply unit 20 has the function of applying the torque of, for example, the solid material drive shaft 15 to the hollow shaft 18B (see FIG FIGS. 4A to 4C ), so that the valve assembly 22 with the shaft shaft 18 B of the applicator head 18 via a sealed rotary feedthrough is coaxially fluidically connectable.
  • the gear 14 is otherwise executed closed on all sides, wherein in the embodiment, a housing-shaped, three-piece, disassemblable gear rack is used and shown.
  • the heating unit 16 is arranged below the gear 14 and the adhesive supply unit 20 and connected (in this embodiment) with these, so fixed. Even with the gun co-rotating heating unit can be realized.
  • the illustrated heating unit allows penetration of the shaft shank 18B and receives a heating means.
  • This may be an infrared radiator 16A which may be mounted in a corresponding receptacle, e.g. is arranged in a provided below the adhesive supply unit 20 position and can be supplied from there with electrical energy.
  • applicator heads are plate-shaped or cylindrical, and provided on the flat back with a hollow shaft shaft 18B.
  • the applicator head 18 can also be designed in several parts in order to simplify the production of adhesive supply channels. On the underside of the application head facing the substrate, the latter can be made flat conical, such as, for example, pyramid or conical be as much as possible to suppress the emergence of a negative pressure in this area.
  • the nozzles 18A are particularly easy to assemble when the disk part of the applicator head is gripped at its circumference at the angle at which the nozzles 18A to the axis of rotation 18D (ejection angle ⁇ - see also Fig. 2 ) should be oriented.
  • the applicator head has a disc shape with a diameter graduation such that the nozzles 18A and 18A 'of both planes or stages have different radial distances b and b' from the axis of rotation 18D and also their axial positions are different.
  • two- or multi-part disc arrangements can serve.
  • FIG. 4B It can be seen that the nozzles 18A can be recessed into the periphery of the applicator head 18 so that the air swirls generated by the nozzles are minimized.
  • nozzles can be arranged at different ejection angles on the rotary head periphery. This is not visible in the plan view, but in the side view, wherein the left part of the side view nozzles with an ejection angle ⁇ of about 70 ° and the right part of nozzles with an ejection angle of about 90 °. Also, nozzles of different ejection angles can be provided on the same application head. This, in turn, with the result that the adhesive thread of each nozzle produces a different application image compared to nozzles with different ejection angles.
  • disk-shaped rotary heads have heretofore been shown, it is to be understood that for the purposes of this invention, annular, star, arm or other type applicator heads may be used.
  • the adhesive supply unit 20 and the screw-connected valve assembly 22 take over the supply of the applicator head 18 with the required amount of adhesive per unit time including the control of the adhesive pressure and the on and off periods of the adhesive supply. This is done in a conventional manner and requires no too detailed explanation.
  • the adhesive supply unit 20 is supplied via a feed 20A with an adhesive supply. Undissolved adhesive leaves the unit via a return 20B. In certain cases, it is possible to dispense with a circulation of the adhesive through a supply and return hose. This is the case, among other things, when it rarely comes to downtime during coating.
  • the desired adhesive pressure is established via a pump within the adhesive supply unit 20.
  • the valve arrangement 22 may be an on / off valve, which is fluidically connected on its inlet side to the pressure pump of the adhesive supply unit 20 and on its outlet side to the adhesive supply channel at the inlet-side mouth end of the shaft 20B.
  • the free shaft end can be inserted at the bottom in the valve assembly and there provided with a rotary seal, so that the effluent on the valve outlet side adhesive is introduced from the stationary valve in the rotating applicator head without adhesive leakage occur.
  • the applicator head can be constructed very differently.
  • a plate shape is useful in many applications but not mandatory.
  • the nozzle arrangement is different depending on the desired application image (adhesive thread pattern):
  • the application head 18 is designed as a cylinder nozzle with a radial bore. It is sufficient, for example, to make a central bore along the axis of the application head and a transverse to the cylinder periphery transverse bore, which is connected at its cylinder jacket side outlet end with a nozzle of suitable diameter and with respect to the axis of rotation 18D suitable alignment at a radial distance b from the axis of rotation.
  • An adhesive thread pattern having a gluing width a producible with such an application head is a in FIG. 5A shown schematically and exemplified.
  • the adhesive thread trace produced on the substrate 30 is circular, the size of the circle diameter and the thread thickness depending on the parameters described above.
  • the circular adhesive track becomes a spiral.
  • the gluing width a results from the diameter of the adhesive track.
  • FIG. 5B A erfidungsgemä ⁇ es and more complex embodiment is in FIG. 5B shown.
  • two circular or spiral adhesive tracks of different diameters are to be applied to the substrate 30.
  • Each is fluidly connected to the central supply bore to create an adhesive track of a different diameter through one nozzle 18A than the other nozzle 18A 'generates it.
  • various ways can be followed, for example, the attachment of the leading to the two nozzles radial bores in different axial length relative to the central bore of the shaft shank 18B.
  • a larger diameter glue line than from the nozzle 18A ' is created, otherwise the same conditions are provided on the nozzles.
  • FIG. 5C are circumferentially distributed on a cylindrical applicator head 18 four nozzles 18A, 18A 'provided with a radial distance of their outlet opening from the axis of rotation 18D, so that superimpose on the substrate 30, four different application pattern.
  • FIG. 5D four to eight nozzles are used, wherein the applicator head 18 is plate-shaped and the nozzles are provided for different sized Abschweiten, so that eg the in FIG. 5D shown adhesive thread pattern on the substrate 30 is formed.
  • a conveyor belt 32 can be seen that is guided as an endless belt around two guide rollers 32A, 32B, of which at least one is rotationally driven.
  • the conveyor belt is suitably non-stick coated on its outwardly facing surface and driven at a predeterminable speed.
  • the applicator head 18 is located in the upstream zone of the conveyor belt at a distance above its upper run so that it will apply an adhesive thread layer of desired width and density with a single or optionally further applicator heads directly onto the advancing conveyor belt below.
  • Kleffofffadenflies 40 which can be lifted and further processed by the conveyor belt 32 on the evening of the optionally cooled transport path, for example by winding into a roll or for application to a substrate for laminating purposes in a heated double nip.
  • buffers in the form of movable pulleys also allow intermittent lamination.
EP06805840A 2005-09-27 2006-09-25 Verfahren und vorrichtung zum auftragen von klebstofffäden und -punkten auf ein substrat sowie ein klebstofffadenflies und eine klebstofffadenschicht aufweisende materialbahn sowie daraus erzeugte produkte Active EP1929079B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE200520015267 DE202005015267U1 (de) 2005-09-27 2005-09-27 Vorrichtung zum Auftragen von Klebstofffäden und -punkten auf ein Substrat
DE102006016584.5A DE102006016584B4 (de) 2005-09-27 2006-04-06 Verfahren und Vorrichtung zum Auftragen von Klebstofffäden und -punkten auf ein Substrat
PCT/EP2006/009281 WO2007036338A2 (de) 2005-09-27 2006-09-25 Verfahren und vorrichtung zum auftragen von klebstofffäden und -punkten auf ein substrat sowie ein klebstoffadenflies und eine klebstofffadenschicht aufweisende materialbahn sowie daraus erzeugte produkte

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP10012004.7 Division-Into 2010-09-30

Publications (2)

Publication Number Publication Date
EP1929079A2 EP1929079A2 (de) 2008-06-11
EP1929079B1 true EP1929079B1 (de) 2012-03-28

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EP06805840A Active EP1929079B1 (de) 2005-09-27 2006-09-25 Verfahren und vorrichtung zum auftragen von klebstofffäden und -punkten auf ein substrat sowie ein klebstofffadenflies und eine klebstofffadenschicht aufweisende materialbahn sowie daraus erzeugte produkte

Country Status (7)

Country Link
US (1) US8323730B2 (ja)
EP (1) EP1929079B1 (ja)
JP (1) JP5096343B2 (ja)
KR (1) KR20080083258A (ja)
AT (1) ATE551455T1 (ja)
DE (1) DE102006016584B4 (ja)
WO (1) WO2007036338A2 (ja)

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DE102012214452B4 (de) 2012-08-14 2019-08-01 Henkel Ag & Co. Kgaa Vorrichtung zum Auftragen einer fadenförmigen Masse
EP2945753A4 (en) * 2013-01-21 2016-11-09 Metzke Pty Ltd PARTICULATE DISPENSER OF A DRILLING SAMPLE
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JP2004255293A (ja) * 2003-02-26 2004-09-16 Hitachi Ltd ２剤接着剤の塗布方法及び装置

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US20210400865A1 (en) * 2018-11-07 2021-12-30 Gtx Turf Farms Lp A seedmat for growing plants

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DE102006016584B4 (de) 2016-02-25
JP2009509734A (ja) 2009-03-12
KR20080083258A (ko) 2008-09-17
JP5096343B2 (ja) 2012-12-12
ATE551455T1 (de) 2012-04-15
EP1929079A2 (de) 2008-06-11
US8323730B2 (en) 2012-12-04
WO2007036338A2 (de) 2007-04-05
US20090136660A1 (en) 2009-05-28
WO2007036338A3 (de) 2007-08-23

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