EP3191643B1 - Clothing and method of producing the clothing - Google Patents

Clothing and method of producing the clothing Download PDF

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Publication number
EP3191643B1
EP3191643B1 EP15754179.8A EP15754179A EP3191643B1 EP 3191643 B1 EP3191643 B1 EP 3191643B1 EP 15754179 A EP15754179 A EP 15754179A EP 3191643 B1 EP3191643 B1 EP 3191643B1
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EP
European Patent Office
Prior art keywords
section
polymer film
perforations
overlap region
sections
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EP15754179.8A
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German (de)
French (fr)
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EP3191643A1 (en
Inventor
Michael Straub
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Voith Patent GmbH
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Voith Patent GmbH
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0063—Perforated sheets
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0054—Seams thereof

Definitions

  • the invention relates to a covering which is suitable for a machine for producing and / or finishing a material web, in particular a fibrous web, such as paper, board or tissue web, and which comprises at least one polymer film comprising an upper side and an underside.
  • a material web in particular a fibrous web, such as paper, board or tissue web, and which comprises at least one polymer film comprising an upper side and an underside.
  • the invention further relates to a method for producing such a fabric.
  • US 4,541,895 A discloses a papermachine fabric comprising a plurality of polymer films stacked and bonded together by ultrasonic welding.
  • the polymer films have perforations which are produced either before or after the bonding of the polymer films by laser drilling.
  • the fabric according to the invention is characterized in that the sections of the at least one polymer film which are arranged on one another in a planar manner are connected to one another by a welded connection, at least on the walls delimiting the perforations.
  • the portions at the walls bounding the perforations are welded together. Since a polymer film for use in a machine producing and / or processing a fibrous web has in the range of 100 to 4000 perforations per cm 2 or more, depending on the shape and / or size of the perforations, and at least some of these perforations according to the invention provide a welded joint between the polymer film sections arranged one above the other, this significantly improves the connection. In some cases, even completely dispensing with an additional laminar laminate connection of the film sections. It is therefore conceivable in this context that per cm 2 between 100 and 4000 welded joints are created.
  • the open area created by the perforations may range from 10% to 50%, preferably from 20% to 40%, more preferably from 25% to 35%.
  • the sections of the at least one polymer film are first arranged on one another such that the underside of a first section of one of the at least one polymer film and the top of a second section thereof or another of the at least one polymer film form an overlap region. Subsequently, energy is then applied to the overlap area in such a way that one or more perforations with one of these delimit by the action of the energy Wall is generated or become and the sections are welded together at least on the walls bounding the perforations.
  • the method according to the invention not only improves the connection between the polymer film sections, as described above, but also significantly simplifies the production of such clothing and therefore more cost-effectively, since the perforations in the at least one polymer film and the connection of the two polymer film sections take place in one process step.
  • a welded connection is produced on the walls delimiting the perforations when the energy for generating the perforation is applied.
  • polymer film is intended to mean a monolithic film having a large extension of length and width compared to its height (the length is at least 300 times greater than the height and the width is at least 100 times greater than the height) formed of a material having as its essential ingredient (at least 80% by weight) a polymer material.
  • the polymer film can be made by extrusion, casting or blow molding, with extrusion production being the most widely used.
  • the thickness of the at least one polymer film is preferably selected from the range from 300 to 1600 .mu.m, more preferably from the range from 500 to 1300 .mu.m, most preferably from 500 to 800 .mu.m.
  • the polymer material of the at least one polymer film may in particular contain or be formed from PET, PA, PPS PE alone or in combination.
  • the at least one polymer film may have in the overlap region in the range of 100 to 4,000 perforations per cm 2 . This not only sufficient permeability of the fabric in the overlapping area but also provided a sufficient connection of the sections in the overlapping area.
  • At least some, in particular all, of the perforations preferably run annularly around the respective wall.
  • the at least one polymer film also has perforations outside the overlapping area.
  • the number of perforations per cm 2 in the overlapping area and outside the overlapping area is substantially the same or even the same.
  • a deviation of not more than 20%, preferably not more than 10%, should be understood.
  • the perforations preferably each have a cross-sectional area in the range of 0.0019 mm 2 to 0.072 mm 2 , in particular in the range of 0.005 mm 2 to 0.0314 mm 2 .
  • the energy acting on the at least one polymer film may preferably be radiation energy, in particular laser radiation energy.
  • the wavelength or the wavelength range of the applied radiation energy is preferably in the range 500-13,000 nm, in particular 10,000-12,000 nm.
  • a typical radiation source for producing such a wavelength or such a wavelength range is a CO 2 laser.
  • a CO 2 laser has, for example, a working wavelength of 10,600 nm.
  • the two sections are pressed against each other at the moment of action of the energy.
  • the acting energy is radiant energy, so This can be done, for example, in a nip, wherein the one of the nip-forming elements, which is arranged on the side facing the radiation source, is preferably transparent to the radiation.
  • an absorber material is arranged, which absorbs the applied energy.
  • the absorber material can contain, for example, carbon black, carbon nanotubes or dyes absorbing in the abovementioned wavelength range.
  • Such an Arbsorbermaterial can be introduced, for example, in the form of a coating between the two sections or incorporated into the material of the polymer film section, which is arranged on the side facing away from the radiation source.
  • the covering comprises a plurality of polymer films, the first section being provided by a first polymer film and the second section by a second polymer film.
  • the covering comprises a plurality of polymer films which have the same width as the clothing and / or a plurality of polymer films which have a smaller width than the clothing.
  • the course of the top and bottom of the at least one polymer film in the overlapping region may be different.
  • the upper and lower sides of the at least one polymer film extend parallel to one another at least in the overlapping region of the two sections.
  • the overlapping area composed of the plural polymer film portions has a greater thickness than each of the polymer film portions.
  • the at least one polymer film has a smaller width than the clothing and two longitudinal edge end sections bounding the polymer film in their width, wherein the first portion is formed by the one and the second portion by the other longitudinal edge end portion of the polymer film, and wherein the polymer film is spirally wound to form the overlapping portion of the first and second portion and the two portions are interconnected in the overlapping region.
  • the first and second portions are provided by the same polymer film.
  • one and another polymer film each have a smaller width than the fabric.
  • Each of the polymer sheets has two longitudinal edge end portions defining the width thereof, wherein each of the polymer sheets has one longitudinal edge end portion forming the first portion and the other longitudinal edge end portion forming the second portion, and wherein the one and the other polymer films are each made endless and further the first portion of the first a polymer film and the second portion of the other polymer film are combined to form the overlapping area and bonded together.
  • the overlap region is formed along the longitudinal edge end sections, then this preferably extends over at least 25% of the width of the respective polymer film.
  • the upper and lower sides of the first section and / or the upper and lower sides of the second section extend obliquely and / or stepped relative to one another at least in the overlapping area in a plane defined by the longitudinal and thickness direction of the at least one polymer film , wherein the underside of the first portion and the top of the second portion are formed complementary to each other in this plane.
  • the overlapping area composed of the plural polymer film portions has the same thickness as the overlapping area forming polymer film sections.
  • a concrete application of this embodiment may be, for example, when the polymer film has two transverse edge end sections bounding the polymer film in its length, the first section passing through the one and the second section through the other Transverse end portion is formed and wherein the polymer film is made endless by the two transverse edge end portions are brought together to form the overlap region and connected together.
  • the polymer film forms an endless belt, wherein the overlapping region formed during the continuous operation has the same thickness as the polymer film outside the first and second sections.
  • the first and second sections are provided by the same polymer film.
  • first and second sections are additionally joined to the contact surface between the upper side of the second section and lower side of the first section, for example by gluing and / or fusing, are connected to each other flat.
  • the FIG. 1 shows a first embodiment of a fabric according to the invention 1 in sections in a view through the machine direction MD and the thickness direction D of the fabric 1 extending cutting plane.
  • the first polymer film 3 has an upper side 5 and a lower side 6 arranged parallel thereto.
  • the second polymer film 4 has an upper side 7 and a lower side 8 arranged parallel thereto.
  • the FIG. 1 1 shows a perforation 2, which in an overlap region 100 of a first portion 101 (with a hatching running from bottom left to top right) of the first polymer film 3 and a second portion 102 (with a hatching running from bottom right to top left) of the second Polymer film 4 is formed.
  • the two sections 101, 102 are arranged flat on one another, the underside 6 of the first section 101 of the first polymer film 3 and the upper side 7 of the second section 102 of the second polymer film 4 being connected to one another.
  • the perforation 2 has a bounding wall 9 which extends from the upper side 5 of the first section 101 of the first polymer film 5 to the lower side 8 of the second section 102 of the second polymer film 4.
  • the two sections 101, 102 are connected to one another, at least on the wall 9 delimiting the perforation 2, by a welded connection 10 that runs annularly in the wall, which is illustrated here as a dotted area.
  • the FIG. 2 shows a second embodiment of a fabric according to the invention 1 in sections in a view through the machine direction MD and the thickness direction D of the fabric 1 extending cutting plane.
  • the fabric 1 comprises in the present case a polymer film 3.
  • the polymer film 3 has two the polymeric film 3 defines transverse edge end portions defining its length, the first transverse edge end portion forming the first portion 101 (having hatching from bottom right to top left) and the second transverse edge end portion forming second portion 102 (having hatching running from bottom left to top right) , As from the representation of FIG. 2 it can be seen, the two sections 101, 102 are brought together to form an overlap region 100 and connected to each other. In the overlapping area 100 perforations 2 are formed.
  • the polymer film 3 has an upper side 5 and a lower side 6. It can be seen that in the overlapping region 100 viewed in the plane defined by the machine direction MD and the thickness direction D of the polymer film 3, the upper side 5 and the lower side 6 of the first section 101 are inclined relative to one another , Furthermore, it can be seen that the upper side 7 and the lower side 8 of the second section 102 are inclined relative to one another.
  • the two sections 101, 102 are formed in the plane shown complementary to each other.
  • the two sections 101, 102 are connected to each other at least at the walls bounding the perforations 2 9 by a welded in the respective wall 9 annular weld joint 10, which are presently shown as dotted areas.
  • the covering 1 comprises a plurality of first polymer films 3a to 3d as well as a plurality of second polymer films 4a to 4c, all of which have a smaller width, ie a smaller extent in the cross-machine direction CD, than the clothing 1.
  • the first polymer films 3a-3d are in Machine transverse direction CD side by side, forming a first layer, arranged.
  • the second polymer foils 4a-4c are arranged next to one another in the cross-machine direction CD, forming a second layer, wherein the two layers are arranged flat on one another.
  • the top view of FIG. 3a looks at the first polymer films 3a-3d.
  • first and second polymer films 3a-3d, 4a-4c are offset in the cross-machine direction CD and provide a plurality of first and second portions 101a to 101f and 102a to 102f each forming an overlap area.
  • the first polymer film 3a provides the first portion 101a which forms the overlapping area 100a with the second portion 102a of the second polymer film 4a.
  • the first polymer film 3b provides the first portion 101b which forms the overlap region 100b with the second portion 102b of the second polymer film 4a. This principle continues with respect to the arrangement of the other sections.
  • the FIG. 4 shows an embodiment of the inventive method for producing, for example, the fabric 1 as this example.
  • the method comprises the following steps: There is provided a first and a second polymer film 3, 4 in the form of a roll.
  • the first polymer film 3 has an upper side 5 and a lower side 6 arranged parallel thereto.
  • the second polymer film 4 has an upper side 7 and a lower side 8 arranged parallel thereto.
  • the two polymer films 3, 4 are brought together and deposited in such a way that at least a first section of the first polymer film 3 and a second section of the second polymer film 4 form an overlap region, in which the bottom 6 of the first polymer film 3 and the top 7 of the second polymer film 4 are stored flat on each other.

Description

Die Erfindung betrifft eine Bespannung, die für eine Maschine zur Herstellung und/oder Veredelung einer Materialbahn, insbesondere einer Faserstoffbahn, wie bspw. Papier-, Karton- oder Tissuebahn, geeignet ist und die zumindest eine eine Ober- und eine Unterseite umfassende Polymerfolie umfasst. Die Erfindung betrifft ferner ein Verfahren zur Herstellung einer solchen Bespannung.The invention relates to a covering which is suitable for a machine for producing and / or finishing a material web, in particular a fibrous web, such as paper, board or tissue web, and which comprises at least one polymer film comprising an upper side and an underside. The invention further relates to a method for producing such a fabric.

Seit geraumer Zeit wird an der Entwicklung von Bespannungen gearbeitet, die zumindest eine Polymerfolie umfassen. Hierdurch sollen textile Strukturen, insbesondere gewobene Strukturen, zumindest teilweise ersetzt werden. Bei der Entwicklung solcher Polymerfolien umfassender Bespannungen ist eine Vielzahl von Hindernissen zu überwinden, um bspw. offene Strukturen zu erzeugen, die im Entwässerungsverhalten ähnlich zu den gewobenen Strukturen sind. Die Herstellung solcher offenen Strukturen kann bspw. dadurch erfolgen, indem die Perforationen mittels Bohren oder Stanzen in die Polymerfolien eingebracht werden. Die Perforationen können hierbei in die Polymerfolie(n) eingebracht werden bevor oder nachdem diese miteinander verbunden werden. Weitere Probleme entstehen bei dem Laminierprozess selbst, wie bspw. beim Endlosmachen und/oder beim spiralförmigen Wickeln und/oder bei der Herstellung "dickerer" Strukturen, d.h. Strukturen, die aus mehreren flächig übereinander angeordneten und miteinander verbundenen Polymerfolien aufgebaut sind. Der Laminierprozess stellt einen zum Perforationsprozess zusätzlichen Prozessschritt dar. Ferner ist die Verbindung der aufeinander laminierten Polymerfolien oftmals nicht ausreichend.For quite some time, work has been going on to develop coverings comprising at least one polymer film. As a result, textile structures, in particular woven structures, are at least partially replaced. In the development of such comprehensive polymer films covering a variety of obstacles to overcome, for example, to create open structures that are similar in drainage behavior to the woven structures. The production of such open structures can, for example, be done by the perforations are introduced by drilling or punching in the polymer films. In this case, the perforations can be introduced into the polymer film (s) before or after they are joined together. Further problems arise in the lamination process itself, such as in endless and / or helical winding and / or in the production of "thicker" structures, i. Structures which are composed of a plurality of planar superimposed and interconnected polymer films. The lamination process is an additional process step to the perforation process. Furthermore, the connection of the laminated polymer films is often insufficient.

US 4 541 895 A offenbart eine Papiermaschinenbespannung umfassend eine Mehrzahl von Polymerfolien, die übereinander angeordnet sind und durch Ultraschallschweißen miteinander verbunden sind. Die Polymerfolien weisen Perforationen auf, die entweder vor oder nach der Verbindung der Polymerfolien durch Laserbohren erzeugt werden. US 4,541,895 A discloses a papermachine fabric comprising a plurality of polymer films stacked and bonded together by ultrasonic welding. The polymer films have perforations which are produced either before or after the bonding of the polymer films by laser drilling.

Es ist die Aufgabe der vorliegenden Erfindung, eine zumindest eine Polymerfolie umfassende Bespannung sowie ein Verfahren zu deren Herstellung vorzuschlagen, bei der bzw. dem die vorherig beschriebenen Probleme reduziert oder gar beseitigt sind.It is the object of the present invention to propose a covering comprising at least one polymer film and a method for the production thereof in which the problems described above are reduced or even eliminated.

Die Aufgabe wird gelöst durch eine Bespannung mit den Merkmalen des Patentanspruchs 1 und durch ein Verfahren mit den Merkmalen des Patentanspruchs 13.The object is achieved by a covering with the features of patent claim 1 and by a method having the features of claim 13.

Die erfindungsgemäße Bespannung ist dadurch gekennzeichnet, dass die flächig aufeinander angeordneten Abschnitte der zumindest einen Polymerfolie zumindest an den die Perforationen begrenzenden Wandungen durch eine Schweißverbindung miteinander verbunden sind.The fabric according to the invention is characterized in that the sections of the at least one polymer film which are arranged on one another in a planar manner are connected to one another by a welded connection, at least on the walls delimiting the perforations.

Demzufolge sind zusätzlich zu einer eventuell bestehenden geklebten oder geschweißten Laminatverbindung der übereinander angeordneten Abschnitte der zumindest einen Polymerfolie die Abschnitte an den die Perforationen begrenzenden Wandungen miteinander verschweißt. Da eine Polymerfolie für den Einsatz in einer eine Faserstoffbahn herstellenden und/oder verarbeitenden Maschine abhängig von der Form und/oder Größe der Perforationen im Bereich von 100 bis 4000 Perforationen pro cm2 oder mehr hat, und an zumindest einigen dieser Perforationen erfindungsgemäß eine Schweißverbindung zwischen den übereinander angeordneten Polymerfolienabschnitten hergestellt ist, wird hierdurch die Verbindung deutlich verbessert. In manchen Fällen kann sogar ganz auf eine zusätzliche flächige Laminatverbindung der Folienabschnitte verzichtet werden. Denkbar ist in diesem Zusammenhang demzufolge, dass pro cm2 zwischen 100 und 4000 Schweißverbindungen geschaffen sind.Accordingly, in addition to any existing bonded or welded laminate connection of the superposed portions of the at least one polymer film, the portions at the walls bounding the perforations are welded together. Since a polymer film for use in a machine producing and / or processing a fibrous web has in the range of 100 to 4000 perforations per cm 2 or more, depending on the shape and / or size of the perforations, and at least some of these perforations according to the invention provide a welded joint between the polymer film sections arranged one above the other, this significantly improves the connection. In some cases, even completely dispensing with an additional laminar laminate connection of the film sections. It is therefore conceivable in this context that per cm 2 between 100 and 4000 welded joints are created.

Die durch die Perforationen geschaffene offene Fläche kann im Bereich von 10% bis 50%, bevorzugt im Bereich von 20% bis 40%, besonders bevorzugt im Bereich von 25% bis 35% liegen.The open area created by the perforations may range from 10% to 50%, preferably from 20% to 40%, more preferably from 25% to 35%.

Bei dem erfindungsgemäßen Verfahren werden die Abschnitte der zumindest einen Polymerfolie zuerst derart flächig aufeinander anordnet, dass die Unterseite eines ersten Abschnitts einer der zumindest einen Polymerfolie und die Oberseite eines zweiten Abschnitts derselben oder einer anderen der zumindest einen Polymerfolie einen Überlappungsbereich bilden. Nachfolgend wird dann auf den Überlappungsbereich derart mit Energie eingewirkt, dass durch die Einwirkung der Energie eine oder mehrere Performationen mit jeweils einer diese begrenzenden Wandung erzeugt wird bzw. werden und die Abschnitte zumindest an den die Perforationen begrenzenden Wandungen miteinander verschweißt werden.In the method according to the invention, the sections of the at least one polymer film are first arranged on one another such that the underside of a first section of one of the at least one polymer film and the top of a second section thereof or another of the at least one polymer film form an overlap region. Subsequently, energy is then applied to the overlap area in such a way that one or more perforations with one of these delimit by the action of the energy Wall is generated or become and the sections are welded together at least on the walls bounding the perforations.

Durch das erfindungsgemäße Verfahren wird nicht nur, wie oben beschrieben, die Verbindung zwischen den Polymerfolienabschnitten verbessert sondern die Herstellung einer solchen Bespannung deutlich vereinfacht und daher kostengünstiger, da die Perforationen in der zumindest einen Polymerfolie und die Verbindung der beiden Polymerfolienabschnitte in einem Prozessschritt erfolgt. Mit anderen Worten wird mit dem erfindungsgemäßen Verfahren eine Schweißverbindung an den die Perforationen begrenzenden Wandungen bei der Einwirkung der Energie zur Erzeugung der Perforation erzeugt.The method according to the invention not only improves the connection between the polymer film sections, as described above, but also significantly simplifies the production of such clothing and therefore more cost-effectively, since the perforations in the at least one polymer film and the connection of the two polymer film sections take place in one process step. In other words, with the method according to the invention, a welded connection is produced on the walls delimiting the perforations when the energy for generating the perforation is applied.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments and further developments of the invention are specified in the subclaims.

Im Rahmen der vorliegenden Erfindung ist anzumerken, dass die Begriffe "Abschnitt einer Polymerfolie" und "Polymerfolienabschnitt" gleichbedeutend für denselben technischen Gegenstand sind. Unter dem Begriff "Polymerfolie" soll im Rahmen der Erfindung eine monolithische Folie mit großer Ausdehnung von Länge und Breite im Vergleich zu deren Höhe (die Länge ist mindestens um den Faktor 300 größer als die Höhe und die Breite ist mindestens um den Faktor 100 größer als die Höhe) verstanden werden, die aus einem Material gebildet ist, welches als wesentlichen Bestandteil (mindestens 80 Gew.-%) ein Polymermaterial hat. Die Polymerfolie kann mittels Extrusion, Gießen oder Blasformen hergestellt sein, wobei die Herstellung durch Extrusion die am meisten verwendete ist. Die Dicke der zumindest einen Polymerfolie ist vorzugsweise gewählt aus dem Bereich von 300 bis 1600 µm, besonders bevorzugt aus dem Bereich von 500 bis 1300 µm, ganz besonders bevorzugt 500 bis 800 µm. Das Polymermaterial der zumindest einen Polymerfolie kann insbesondere PET, PA, PPS PE allein oder in Kombination enthalten oder daraus gebildet sein.It should be noted in the context of the present invention that the terms "section of a polymer film" and "polymer film section" are synonymous with the same technical article. In the context of the invention, the term "polymer film" is intended to mean a monolithic film having a large extension of length and width compared to its height (the length is at least 300 times greater than the height and the width is at least 100 times greater than the height) formed of a material having as its essential ingredient (at least 80% by weight) a polymer material. The polymer film can be made by extrusion, casting or blow molding, with extrusion production being the most widely used. The thickness of the at least one polymer film is preferably selected from the range from 300 to 1600 .mu.m, more preferably from the range from 500 to 1300 .mu.m, most preferably from 500 to 800 .mu.m. The polymer material of the at least one polymer film may in particular contain or be formed from PET, PA, PPS PE alone or in combination.

Die zumindest eine Polymerfolie kann im Überlappungsbereich im Bereich von 100 bis 4.000 Perforationen pro cm2 haben. Hierdurch wird nicht nur eine ausreichende Permeabilität der Bespannung im Überlappungsbereich sondern auch eine ausreichende Verbindung der Abschnitte im Überlappungsbereich bereitgestellt.The at least one polymer film may have in the overlap region in the range of 100 to 4,000 perforations per cm 2 . This not only sufficient permeability of the fabric in the overlapping area but also provided a sufficient connection of the sections in the overlapping area.

Vorzugsweise läuft die Schweißverbindung bei zumindest einigen, insbesondere allen, der Perforationen ringförmig an der jeweiligen Wandung um.At least some, in particular all, of the perforations preferably run annularly around the respective wall.

Ferner ist es denkbar, dass die zumindest eine Polymerfolie auch außerhalb des Überlappungsbereichs Perforationen hat. Vorzugsweise ist hierbei die Anzahl der Perforationen pro cm2 im Überlappungsbereich und außerhalb des Überlappungsbereichs im Wesentlichen gleich oder sogar gleich. Unter im Wesentlichen gleich soll in diesem Zusammenhang eine Abweichung von nicht mehr als 20%, bevorzugt nicht mehr als 10%, verstanden werden. Die Perforationen haben vorzugsweise jeweils eine Querschnittsfläche im Bereich von 0,0019 mm2 bis 0,072 mm2, insbesondere im Bereich von 0,005 mm2 bis 0,0314 mm2.Furthermore, it is conceivable that the at least one polymer film also has perforations outside the overlapping area. Preferably, the number of perforations per cm 2 in the overlapping area and outside the overlapping area is substantially the same or even the same. By substantially equal in this context, a deviation of not more than 20%, preferably not more than 10%, should be understood. The perforations preferably each have a cross-sectional area in the range of 0.0019 mm 2 to 0.072 mm 2 , in particular in the range of 0.005 mm 2 to 0.0314 mm 2 .

Bei der auf die zumindest eine Polymerfolie einwirkenden Energie kann es sich bevorzugt um Strahlungsenergie, insbesondere um Laserstrahlungsenergie, handeln. Hierbei liegt die Wellenlänge oder der Wellenlängenbereich der einwirkenden Strahlungsenergie vorzugsweise im Bereich 500-13.000nm, insbesondere 10.000-12.000nm. Bei Verwendung von Strahlungsenergie mit einer solchen Wellenlänge oder einem solchen Wellenlängenbereich findet beim Perforieren ein erheblicher thermischer Eintrag im Bereich der Wandung der Perforation statt, die für die Herstellung der Schweißverbindung zwischen den zwei Polymerfolienabschnitten verwendet werden kann. Eine typische Strahlungsquelle zur Erzeugung einer derartigen Wellenlänge oder eines derartigen Wellenlängenbereichs ist ein CO2-Laser. Ein CO2-Laser hat bspw. eine Arbeitswellenlänge von 10.600nm.The energy acting on the at least one polymer film may preferably be radiation energy, in particular laser radiation energy. In this case, the wavelength or the wavelength range of the applied radiation energy is preferably in the range 500-13,000 nm, in particular 10,000-12,000 nm. When radiant energy of such wavelength or wavelength range is used, perforation results in substantial thermal input in the area of the wall of the perforation which can be used to make the weld between the two sections of polymer film. A typical radiation source for producing such a wavelength or such a wavelength range is a CO 2 laser. A CO 2 laser has, for example, a working wavelength of 10,600 nm.

Zur Verbesserung der Schweißverbindung an den die Perforationen begrenzenden Wandungen kann es ferner sinnvoll sein, wenn die beiden Abschnitte im Moment der Einwirkung der Energie gegeneinander gepresst werden. Handelt es sich bei der einwirkenden Energie um Strahlungsenergie, so kann dies bspw. in einem Nip erfolgen, wobei das eine der den Nip bildenden Elemente, welches auf der der Strahlungsquelle zugewandten Seite angeordnet ist, vorzugsweise transparent für die Strahlung ist.To improve the weld on the perforations bounding walls, it may also be useful if the two sections are pressed against each other at the moment of action of the energy. If the acting energy is radiant energy, so This can be done, for example, in a nip, wherein the one of the nip-forming elements, which is arranged on the side facing the radiation source, is preferably transparent to the radiation.

Im Überlappungsbereich, bspw. zwischen den beiden Abschnitten, ist ein Absorbermaterial angeordnet, welches die einwirkende Energie absorbiert. Das Absorbermaterial kann bspw. Ruß, Kohlenstoffnanoröhren oder im oben angegebenen Wellenlängenbereich absorbierende Farbstoffe, enthalten. Ein solches Arbsorbermaterial kann bspw. in Form einer Beschichtung zwischen die beiden Abschnitte eingebracht werden oder aber in das Material des Polymerfolienabschnitts eingebracht sein, welche auf der der Strahlungsquelle abgewandten Seite angeordnet ist.In the overlapping area, for example between the two sections, an absorber material is arranged, which absorbs the applied energy. The absorber material can contain, for example, carbon black, carbon nanotubes or dyes absorbing in the abovementioned wavelength range. Such an Arbsorbermaterial can be introduced, for example, in the form of a coating between the two sections or incorporated into the material of the polymer film section, which is arranged on the side facing away from the radiation source.

Bezüglich des konkreten Aufbaus der Bespannung sind verschiedene Möglichkeiten denkbar. So ist es bspw. möglich, dass die Bespannung mehrere Polymerfolien umfasst, wobei der erste Abschnitt durch eine erste Polymerfolie und der zweite Abschnitt durch eine zweite Polymerfolie bereitgestellt ist. In diesem Zusammenhang ist es bspw. möglich, dass die Bespannung mehrere Polymerfolien umfasst welche die gleiche Breite wie die Bespannung haben und/oder mehrere Polymerfolien, welche eine geringere Breite als die Bespannung haben.With regard to the concrete construction of the covering, various possibilities are conceivable. Thus, for example, it is possible that the covering comprises a plurality of polymer films, the first section being provided by a first polymer film and the second section by a second polymer film. In this context, it is possible, for example, that the covering comprises a plurality of polymer films which have the same width as the clothing and / or a plurality of polymer films which have a smaller width than the clothing.

Der Verlauf der Ober- und Unterseite der zumindest einen Polymerfolie im Überlappungsbereich kann unterschiedlich sein. So ist es bspw. denkbar, dass die Ober- und Unterseite der zumindest einen Polymerfolie zumindest im Überlappungsbereich der beiden Abschnitte parallel zueinander verlaufen. In diesem Fall hat der aus den mehreren Polymerfolienabschnitten aufgebaute Überlappungsbereich eine größere Dicke aus als jeder der Polymerfolienabschnitte.The course of the top and bottom of the at least one polymer film in the overlapping region may be different. For example, it is conceivable that the upper and lower sides of the at least one polymer film extend parallel to one another at least in the overlapping region of the two sections. In this case, the overlapping area composed of the plural polymer film portions has a greater thickness than each of the polymer film portions.

In diesem Zusammenhang ist es bspw. denkbar, dass die zumindest eine Polymerfolie eine geringere Breite hat als die Bespannung sowie zwei die Polymerfolie in ihrer Breite begrenzende Längskantenendabschnitte, wobei der erste Abschnitt durch den einen und der zweite Abschnitt durch den anderen Längskantenendabschnitt der Polymerfolie gebildet ist, und wobei die Polymerfolie unter Ausbildung des Überlappungsbereichs von erstem und zweitem Abschnitt spiralförmig gewickelt ist und die beiden Abschnitte im Überlappungsbereich miteinander verbunden sind. In diesem Fall wird demzufolge der erste und der zweite Abschnitt durch dieselbe Polymerfolie bereitgestellt.In this context, it is conceivable, for example, that the at least one polymer film has a smaller width than the clothing and two longitudinal edge end sections bounding the polymer film in their width, wherein the the first portion is formed by the one and the second portion by the other longitudinal edge end portion of the polymer film, and wherein the polymer film is spirally wound to form the overlapping portion of the first and second portion and the two portions are interconnected in the overlapping region. In this case, accordingly, the first and second portions are provided by the same polymer film.

Alternativ dazu ist es denkbar, dass eine eine und eine andere Polymerfolie jeweils eine geringere Breite als die Bespannung haben. Jede der Polymerfolien hat hierbei zwei diese in ihrer Breite begrenzende Längskantenendabschnitte, wobei bei jeder der Polymerfolien der eine Längskantenendabschnitt den ersten Abschnitt und der andere Längskantenendabschnitt den zweiten Abschnitt bildet und wobei die eine und die andere Polymerfolie jeweils endlos gemacht sind und ferner der erste Abschnitt der einen Polymerfolie und der zweite Abschnitt der anderen Polymerfolie unter Bildung des Überlappungsbereichs zusammengeführt und miteinander verbunden sind.Alternatively, it is conceivable that one and another polymer film each have a smaller width than the fabric. Each of the polymer sheets has two longitudinal edge end portions defining the width thereof, wherein each of the polymer sheets has one longitudinal edge end portion forming the first portion and the other longitudinal edge end portion forming the second portion, and wherein the one and the other polymer films are each made endless and further the first portion of the first a polymer film and the second portion of the other polymer film are combined to form the overlapping area and bonded together.

Ist der Überlappungsbereich entlang der Längskantenendabschnitte gebildet, so erstreckt sich dieser vorzugsweise über zumindest 25% der Breite der jeweiligen Polymerfolie.If the overlap region is formed along the longitudinal edge end sections, then this preferably extends over at least 25% of the width of the respective polymer film.

Ferner ist es denkbar, dass die Ober- und Unterseite des ersten Abschnitts und/oder die Ober- und Unterseite des zweiten Abschnitts zumindest im Überlappungsbereich in einer durch die Längs- und Dickenrichtung der zumindest einen Polymerfolie aufgespannten Ebene betrachtet schräg und/oder gestuft zueinander verlaufen, wobei die Unterseite des ersten Abschnitts und die Oberseite des zweiten Abschnitts in dieser Ebene zueinander komplementär ausgebildet sind. In diesem Fall hat der aus den mehreren Polymerfolienabschnitten aufgebaute Überlappungsbereich die gleiche Dicke wie die den Überlappungsbereich bildenden Polymerfolienabschnitte. Eine konkrete Anwendung dieser Ausgestaltung kann bspw. sein, wenn die Polymerfolie zwei die Polymerfolie in ihrer Länge begrenzende Querkantenendabschnitte hat, wobei der erste Abschnitt durch den einen und der zweite Abschnitt durch den anderen Querkantenendabschnitt gebildet ist und wobei die Polymerfolie endlos gemacht ist, indem die beiden Querkantenendabschnitte unter Bildung des Überlappungsbereichs zusammengeführt und miteinander verbunden sind. In diesem Fall bildet also die Polymerfolie ein Endlosband, wobei der beim Endlosmachen gebildete Überlappungsbereich die gleiche Dicke hat wie die Polymerfolie außerhalb des ersten und zweiten Abschnitts. Auch in diesem Fall wird der erste und der zweite Abschnitt durch dieselbe Polymerfolie bereitgestellt.Furthermore, it is conceivable that the upper and lower sides of the first section and / or the upper and lower sides of the second section extend obliquely and / or stepped relative to one another at least in the overlapping area in a plane defined by the longitudinal and thickness direction of the at least one polymer film , wherein the underside of the first portion and the top of the second portion are formed complementary to each other in this plane. In this case, the overlapping area composed of the plural polymer film portions has the same thickness as the overlapping area forming polymer film sections. A concrete application of this embodiment may be, for example, when the polymer film has two transverse edge end sections bounding the polymer film in its length, the first section passing through the one and the second section through the other Transverse end portion is formed and wherein the polymer film is made endless by the two transverse edge end portions are brought together to form the overlap region and connected together. In this case, therefore, the polymer film forms an endless belt, wherein the overlapping region formed during the continuous operation has the same thickness as the polymer film outside the first and second sections. Also in this case, the first and second sections are provided by the same polymer film.

Um die Verbindung der Abschnitte noch weiter zu verbessern kann es für manche Anwendungen noch vor Vorteil sein, wenn der erste und zweite Abschnitt zusätzlich noch an der Kontaktfläche zwischen Oberseite des zweiten Abschnitts und Unterseite des ersten Abschnitts, bspw. durch Verkleben und/oder Verschmelzen, flächig miteinander verbunden sind.In order to further improve the connection of the sections, it may be advantageous for some applications if the first and second sections are additionally joined to the contact surface between the upper side of the second section and lower side of the first section, for example by gluing and / or fusing, are connected to each other flat.

Beispielhaft kann bei Perforationen mit kreisrunder Querschnittsform die Anzahl der Perforationen pro cm2 wie folgt sein:

  • bei einem Durchmesser von 0,3mm pro Perforation: 350-400 Perforationen pro cm2
  • bei einem Durchmesser von 0,1mm pro Perforation: 3000-4000 Perforationen pro cm2
  • bei einem Durchmesser von 0,4mm pro Perforation: 50-200 Perforationen pro cm2
By way of example, in the case of perforations having a circular cross-sectional shape, the number of perforations per cm 2 can be as follows:
  • with a diameter of 0,3mm per perforation: 350-400 perforations per cm 2
  • with a diameter of 0,1mm per perforation: 3000-4000 perforations per cm 2
  • with a diameter of 0.4mm per perforation: 50-200 perforations per cm 2

Die Erfindung wird nachfolgend anhand von schematischen und nicht maßstabsgetreuen Zeichnungen weiter erläutert. Es zeigen

Figur 1
eine erste Ausführungsform einer erfindungsgemäßen Bespannung in abschnittweise Darstellung in einer senkrecht zur Länge und Breite der Bespannung verlaufenden Schnittebene,
Figur 2
eine zweite Ausführungsform einer erfindungsgemäßen Bespannung in abschnittweise Darstellung in einer senkrecht zur Länge und Breite der Bespannung verlaufenden Schnittebene,
Figur 3
eine dritte Ausführungsform einer erfindungsgemäßen Bespannung in abschnittweise Darstellung in Draufsicht sowie in der senkrecht zur Länge und Breite der Bespannung verlaufenden Schnittebene A-A und
Figur 4
eine Ausführungsform des erfindungsgemäßen Verfahrens.
The invention will be further elucidated on the basis of schematic and not to scale drawings. Show it
FIG. 1
a first embodiment of a covering according to the invention in section in a sectional plane running perpendicular to the length and width of the fabric,
FIG. 2
a second embodiment of a covering according to the invention in sections in a sectional plane running perpendicular to the length and width of the fabric,
FIG. 3
a third embodiment of a covering according to the invention in sections in plan view and in the direction perpendicular to the length and width of the fabric cutting plane AA and
FIG. 4
an embodiment of the method according to the invention.

Die Figur 1 zeigt eine erste Ausführungsform einer erfindungsgemäßen Bespannung 1 in abschnittweise Darstellung in einer durch die Maschinenrichtung MD und die Dickenrichtung D der Bespannung 1 verlaufenden Schnittebene. Die Bespannung 1 umfasst vorliegend zwei Polymerfolien 3, 4. Hierbei hat die erste Polymerfolie 3 eine Oberseite 5 und eine dieser parallel gegenüberliegend angeordnete Unterseite 6. Ferner hat die zweite Polymerfolie 4 eine Oberseite 7 und eine dieser parallel gegenüberliegend angeordnete Unterseite 8.The FIG. 1 shows a first embodiment of a fabric according to the invention 1 in sections in a view through the machine direction MD and the thickness direction D of the fabric 1 extending cutting plane. In the present case, the first polymer film 3 has an upper side 5 and a lower side 6 arranged parallel thereto. Furthermore, the second polymer film 4 has an upper side 7 and a lower side 8 arranged parallel thereto.

Die Figur 1 zeigt eine Perforation 2, die in einem Überlappungsbereich 100 von einem ersten Abschnitt 101 (mit einer von links unten nach rechts oben laufenden Schraffur) der ersten Polymerfolie 3 und einem zweiten Abschnitt 102 (mit einer von rechts unten nach links oben laufenden Schraffur) der zweiten Polymerfolie 4 gebildet ist. Die beiden Abschnitte 101, 102 sind hierbei flächig aufeinander angeordnet, wobei die Unterseite 6 des ersten Abschnitts 101 der ersten Polymerfolie 3 und die Oberseite 7 des zweiten Abschnitts 102 der zweiten Polymerfolie 4 miteinander verbunden sind. Die Perforation 2 hat eine diese begrenzende Wandung 9, welche sich von der Oberseite 5 des ersten Abschnitts 101 der ersten Polymerfolie 5 bis zur Unterseite 8 des zweiten Abschnitts 102 der zweiten Polymerfolie 4 erstreckt. Die beiden Abschnitte 101, 102 sind zumindest an der die Perforation 2 begrenzenden Wandung 9 durch eine in der Wandung ringförmig umlaufende Schweißverbindung 10 miteinander verbunden, welche vorliegend als punktierter Bereich dargestellt ist.The FIG. 1 1 shows a perforation 2, which in an overlap region 100 of a first portion 101 (with a hatching running from bottom left to top right) of the first polymer film 3 and a second portion 102 (with a hatching running from bottom right to top left) of the second Polymer film 4 is formed. In this case, the two sections 101, 102 are arranged flat on one another, the underside 6 of the first section 101 of the first polymer film 3 and the upper side 7 of the second section 102 of the second polymer film 4 being connected to one another. The perforation 2 has a bounding wall 9 which extends from the upper side 5 of the first section 101 of the first polymer film 5 to the lower side 8 of the second section 102 of the second polymer film 4. The two sections 101, 102 are connected to one another, at least on the wall 9 delimiting the perforation 2, by a welded connection 10 that runs annularly in the wall, which is illustrated here as a dotted area.

Die Figur 2 zeigt eine zweite Ausführungsform einer erfindungsgemäßen Bespannung 1 in abschnittweise Darstellung in einer durch die Maschinenrichtung MD und die Dickenrichtung D der Bespannung 1 verlaufenden Schnittebene. Die Bespannung 1 umfasst vorliegend eine Polymerfolie 3. Die Polymerfolie 3 hat zwei die Polymerfolie 3 in ihrer Länge begrenzende Querkantenendabschnitte, wobei der erste Querkantenendabschnitt den ersten Abschnitt 101 (mit einer von rechts unten nach links oben laufenden Schraffur) und der zweite Querkantenendabschnitt den zweiten Abschnitt 102 (mit einer von links unten nach rechts oben laufenden Schraffur) bildet. Wie aus der Darstellung der Figur 2 zu erkennen ist, sind die beiden Abschnitte 101, 102 unter Bildung eines Überlappungsbereichs 100 zusammengeführt und miteinander verbunden. In den Überlappungsbereich 100 sind Perforationen 2 gebildet.The FIG. 2 shows a second embodiment of a fabric according to the invention 1 in sections in a view through the machine direction MD and the thickness direction D of the fabric 1 extending cutting plane. The fabric 1 comprises in the present case a polymer film 3. The polymer film 3 has two the polymeric film 3 defines transverse edge end portions defining its length, the first transverse edge end portion forming the first portion 101 (having hatching from bottom right to top left) and the second transverse edge end portion forming second portion 102 (having hatching running from bottom left to top right) , As from the representation of FIG. 2 it can be seen, the two sections 101, 102 are brought together to form an overlap region 100 and connected to each other. In the overlapping area 100 perforations 2 are formed.

Die Polymerfolie 3 hat eine Oberseite 5 und eine Unterseite 6. Man erkennt, dass im Überlappungsbereich 100 in der durch die Maschinenrichtung MD und die Dickenrichtung D der Polymerfolie 3 aufgespannten Ebene betrachtet, die Oberseite 5 und die Unterseite 6 des ersten Abschnitts 101 schräg zueinander verlaufen. Ferner erkennt man, dass die Oberseite 7 und die Unterseite 8 des zweiten Abschnitts 102 schräg zueinander verlaufen. Die beiden Abschnitte 101, 102 sind in der dargestellten Ebene komplementärzueinander ausgebildet. Die beiden Abschnitte 101, 102 sind zumindest an den die Perforationen 2 begrenzenden Wandungen 9 durch eine in der jeweiligen Wandung 9 ringförmig umlaufende Schweißverbindung 10 miteinander verbunden, welche vorliegend als punktierte Bereiche dargestellt sind.The polymer film 3 has an upper side 5 and a lower side 6. It can be seen that in the overlapping region 100 viewed in the plane defined by the machine direction MD and the thickness direction D of the polymer film 3, the upper side 5 and the lower side 6 of the first section 101 are inclined relative to one another , Furthermore, it can be seen that the upper side 7 and the lower side 8 of the second section 102 are inclined relative to one another. The two sections 101, 102 are formed in the plane shown complementary to each other. The two sections 101, 102 are connected to each other at least at the walls bounding the perforations 2 9 by a welded in the respective wall 9 annular weld joint 10, which are presently shown as dotted areas.

Die Figur 3 zeigt eine dritte Ausführungsform einer erfindungsgemäßen Bespannung 1 in abschnittweise Darstellung in Draufsicht (Figur 3a) sowie in einer senkrecht zur Maschinenrichtung MD und Maschinenquerrichtung CD verlaufenden Schnittebene A-A (Figur 3b). Zu bemerken ist, dass die Bespannung 1 auf ihrer gesamten Ausdehnung in Maschinenrichtung MD und Maschinenquerrichtung CD Perforationen 9 hat, von denen aber in der Darstellung nur einige zu erkennen sind.The FIG. 3 shows a third embodiment of a fabric according to the invention 1 in sections in plan view ( FIG. 3a ) as well as in a direction perpendicular to the machine direction MD and machine transverse direction CD cutting plane AA ( FIG. 3b ). It should be noted that the fabric 1 has perforations 9 over its entire extent in the machine direction MD and cross machine direction CD, but only a few of them can be seen in the illustration.

Die Bespannung 1 umfasst vorliegend mehrere erste Polymerfolien 3a bis 3d sowie mehrere zweite Polymerfolien 4a bis 4c, die allesamt eine geringere Breite, d.h. eine geringere Erstreckung in Maschinenquerrichtung CD, als die Bespannung 1 haben. Die ersten Polymerfolien 3a-3d sind in Maschinenquerrichtung CD nebeneinander, eine erste Lage bildend, angeordnet. Die zweiten Polymerfolien 4a-4c sind in Maschinenquerrichtung CD nebeneinander liegend, eine zweite Lage bildend, angeordnet, wobei die beiden Lagen flächig aufeinander angeordnet sind. Die Draufsicht der Figur 3a schaut auf die ersten Polymerfolien 3a-3d. Man erkennt, dass die ersten und zweiten Polymerfolien 3a-3d, 4a-4c in Maschinenquerrichtung CD versetzt zueinander angeordnet sind und hierbei mehrere erste und zweite jeweils einen Überlappungsbereich bildende Abschnitte 101a bis 101f sowie 102a bis 102f bereitstellen. Konkret stellt die erste Polymerfolie 3a den ersten Abschnitt 101a bereit, der mit dem zweiten Abschnitt 102a der zweiten Polymerfolie 4a den Überlappungsbereich 100a bildet. Des Weiteren stellt die erste Polymerfolie 3b den ersten Abschnitt 101b bereit, der mit dem zweiten Abschnitt 102b der zweiten Polymerfolie 4a den Überlappungsbereich 100b bildet. Dieses Prinzip setzt sich bzgl. der Anordnung der weiteren Abschnitte fort.In the present case, the covering 1 comprises a plurality of first polymer films 3a to 3d as well as a plurality of second polymer films 4a to 4c, all of which have a smaller width, ie a smaller extent in the cross-machine direction CD, than the clothing 1. The first polymer films 3a-3d are in Machine transverse direction CD side by side, forming a first layer, arranged. The second polymer foils 4a-4c are arranged next to one another in the cross-machine direction CD, forming a second layer, wherein the two layers are arranged flat on one another. The top view of FIG. 3a looks at the first polymer films 3a-3d. It can be seen that the first and second polymer films 3a-3d, 4a-4c are offset in the cross-machine direction CD and provide a plurality of first and second portions 101a to 101f and 102a to 102f each forming an overlap area. Concretely, the first polymer film 3a provides the first portion 101a which forms the overlapping area 100a with the second portion 102a of the second polymer film 4a. Furthermore, the first polymer film 3b provides the first portion 101b which forms the overlap region 100b with the second portion 102b of the second polymer film 4a. This principle continues with respect to the arrangement of the other sections.

Die Figur 4 zeigt eine Ausführungsform des erfindungsgemäßen Verfahrens zur Herstellung bspw. der Bespannung 1 wie diese bspw. in der Figur 1 gezeigt ist. Das Verfahren umfasst hierbei die folgenden Schritte:
Es wird eine erste und eine zweite Polymerfolie 3, 4 in Form einer Rollenware bereitgestellt. Hierbei hat die erste Polymerfolie 3 eine Oberseite 5 und eine dieser parallel gegenüberliegend angeordnete Unterseite 6. Ferner hat die zweite Polymerfolie 4 eine Oberseite 7 und eine dieser parallel gegenüberliegend angeordnete Unterseite 8.The FIG. 4 shows an embodiment of the inventive method for producing, for example, the fabric 1 as this example. In the FIG. 1 is shown. The method comprises the following steps:
There is provided a first and a second polymer film 3, 4 in the form of a roll. In this case, the first polymer film 3 has an upper side 5 and a lower side 6 arranged parallel thereto. Furthermore, the second polymer film 4 has an upper side 7 and a lower side 8 arranged parallel thereto.

Die beiden Polymerfolien 3, 4 werden zusammengeführt und derart abgelegt, dass zumindest ein erster Abschnitt der ersten Polymerfolie 3 und ein zweiter Abschnitt der zweiten Polymerfolie 4 einen Überlappungsbereich bilden, in dem die Unterseite 6 der ersten Polymerfolie 3 und die Oberseite 7 der zweiten Polymerfolie 4 flächig aufeinander abgelegt sind.The two polymer films 3, 4 are brought together and deposited in such a way that at least a first section of the first polymer film 3 and a second section of the second polymer film 4 form an overlap region, in which the bottom 6 of the first polymer film 3 and the top 7 of the second polymer film 4 are stored flat on each other.

In einem weiteren Prozessschritt wird auf diesen Überlappungsbereich lokal mit Strahlungsenergie in Form von Laser-Strahlung eines CO2-Lasers der Wellenlänge von ca. 10.600nm eingewirkt, wodurch eine oder mehrere Performationen 2 mit jeweils diese begrenzender Wandung 9 erzeugt werden und wodurch die beiden Abschnitte an den die Perforationen 2 begrenzenden Wandungen 9 miteinander verschweißt werden. Während der Einwirkung der Laserstrahlung werden die beiden Polymerfolien 3, 4 in einem Durch zwei Presselemente 13, 14 gebildeten Nip gegeneinander gedrückt, wobei das der Strahlungsquelle zugewandte Presselement 13 transparent für die Laserstrahlung ist.In a further process step is acted on these overlapping area locally with radiation energy in the form of laser radiation of a CO 2 laser of wavelength of about 10.600nm, whereby one or more Performationen 2 with this limiting wall 9 are generated, and whereby the two sections to which the perforations 2 limiting Walls 9 are welded together. During the action of the laser radiation, the two polymer films 3, 4 are pressed against one another in a nip formed by two pressing elements 13, 14, the pressing element 13 facing the radiation source being transparent to the laser radiation.

Hierdurch wird eine Verbundstruktur aus der ersten und zweiten Polymerfolie 3, 4 geschaffen, die nachfolgend als Rollenware wieder aufgewickelt und weiter verarbeitet werden kann.As a result, a composite structure of the first and second polymer film 3, 4 is created, which can be subsequently rewound as a roll and further processed.

Claims (14)

  1. Clothing which is suitable for a machine for producing and/or finishing a material web, in particular a fibrous material web such as a paper, board or tissue web, having at least one polymer film (3, 3a-3d, 4, 4a-4c) comprising an upper side (5, 7) and a lower side (6, 8), the lower side of a first section (101, 101a-101f) of one of the at least one of the polymer films and the upper side of a second section (102, 102a-102f) of the same or another of the at least one polymer films being arranged one over the other in surface contact in an overlap region (100, 100a-100f) and being connected to each other in at least some sections, perforations that are delimited by walls being formed in the overlap region and penetrating the two sections arranged on each other from the upper side of the first section as far as the lower side of the second section, the perforations being produced under the action of energy acting on the at least one polymer film, the sections being connected to each other by a welded connection (10), at least at the walls that delimit the perforations, and an absorber material absorbing the energy acting to produce the perforations being arranged in the overlap region, so that the respective welded connection is made during the action of energy for producing the perforations associated therewith.
  2. Clothing according to Claim 1, characterized in that a plurality of polymer films are provided, wherein the first section is provided by a first polymer film and the second section by a second polymer film.
  3. Clothing according to Claim 2, characterized in that the upper and lower side of the respective polymer film extend parallel to each other, at least in the overlap region provided by the two sections.
  4. Clothing according to Claim 2 or 3, characterized in that the overlap region extends over at least 25% of the length and width of the first and second polymer film.
  5. Clothing according to Claim 1, characterized in that the first and the second section are provided by the same polymer film.
  6. Clothing according to Claim 5, characterized in that the polymer film has two transverse edge end sections delimiting the length of the polymer film, wherein the first section is formed by the one and the second section by the other transverse edge end section, and wherein the polymer film is made endless by the two transverse edge end sections being led together and connected to each other, forming the overlap region.
  7. Clothing according to one of the preceding claims, characterized in that the upper and lower side of the first section and/or the upper and lower side of the second section, viewed in a plane spanned by the longitudinal and thickness direction of the at least one polymer film, extend obliquely and/or in a stepped manner relative to each other, wherein the lower side of the first section and the upper side of the second section extend in a complementary fashion relative to each other in this plane.
  8. Clothing according to Claim 1, 5 or 6, characterized in that the at least one polymer film has a lower width than the clothing and two longitudinal edge end sections delimiting the width of the polymer film, wherein the first section is formed by the one and the second section by the other longitudinal edge end section, and wherein, to produce the clothing in its width, the first section and the second section of the same of the at least one polymer film or the first section of one of the at least one polymer films and the second section of another of the at least one polymer films are led together and connected to each other, forming the overlap region.
  9. Clothing according to one of the preceding claims, characterized in that the at least one polymer film also has perforations outside the overlap region.
  10. Clothing according to one of the preceding claims, characterized in that the first and the second section in the overlap region are additionally connected to each other in surface contact at the contact surface between the upper side of the second section and lower side of the first section, for example by adhesive bonding and/or fusing.
  11. Clothing according to one of the preceding claims, characterized in that the at least one polymer film has 100-4000 perforations per cm2 in the overlap region.
  12. Clothing according to one of the preceding claims, characterized in that the perforations each have a cross sectional area in the range from 0.0019 mm2 to 0.072 mm2, in particular in the range from 0.005 mm2 to 0.0314 mm2.
  13. Method for producing clothing which is suitable for a machine for producing and/or finishing a material web, in particular a fibrous material web such as a paper, board or tissue web, which comprises the following steps:
    a. providing at least one polymer film (3, 3a-3d, 4, 4a-4c) having an upper side (5, 7) and a lower side (6, 8),
    b. forming an overlap region (100, 100a-100f) by arranging the lower side of a first section (101, 101a-101f) of one of the at least one polymer films and the upper side of a second section (102, 102a-102f) of the same or another of the at least one polymer films one over the other in surface contact, wherein an energy-absorbing absorber material is arranged in the overlap region,
    c. causing energy absorbed by the absorber material to act on the at least one polymer film in the overlap region in such a way that, as a result of the action, one or more perforations (2) each having a wall (9) delimiting the same are produced and, in the same process step, the sections are welded to one another, at least at the wall delimiting the perforations.
  14. Method according to Claim 13, characterized in that the energy acting is radiation energy, in particular laser radiation energy, wherein in particular the wavelength of the radiation energy acting lies in the range from 500-12,000 nm, preferably in the range from 10,000-11,000 nm.
EP15754179.8A 2014-09-10 2015-08-20 Clothing and method of producing the clothing Not-in-force EP3191643B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014218074 2014-09-10
PCT/EP2015/069135 WO2016037825A1 (en) 2014-09-10 2015-08-20 Clothing

Publications (2)

Publication Number Publication Date
EP3191643A1 EP3191643A1 (en) 2017-07-19
EP3191643B1 true EP3191643B1 (en) 2018-11-07

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EP15754179.8A Not-in-force EP3191643B1 (en) 2014-09-10 2015-08-20 Clothing and method of producing the clothing

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WO (1) WO2016037825A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018105433A1 (en) * 2018-03-09 2019-09-12 Voith Patent Gmbh Process for the production of a basic structure for a paper machine clothing

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4541895A (en) * 1982-10-29 1985-09-17 Scapa Inc. Papermakers fabric of nonwoven layers in a laminated construction
GB0325463D0 (en) * 2003-10-31 2003-12-03 Voith Fabrics Patent Gmbh Three dimensional tomographic fabric assembly
DE102010063870A1 (en) * 2010-12-22 2012-06-28 Voith Patent Gmbh Method for manufacturing e.g. forming fabric used for supporting and transporting fiber web in papermaking machine, involves stretching endless film substrate in circulating direction of endless film substrate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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WO2016037825A1 (en) 2016-03-17
EP3191643A1 (en) 2017-07-19

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