EP2734672B1 - Spliced endless clothing - Google Patents

Description

The present invention relates to fabrics for paper machines and more particularly relates to non-woven fabrics and their manufacture.

Paper machines are used to produce nonwoven webs such as papers of various types, cartons, cardboard and similar nonwovens. The term "paper" is used herein to represent these types of nonwoven fibrous webs.

The production of a nonwoven web begins in the Formierpartie a paper machine with the application of a pulp suspension on a fabric or with the introduction of a pulp suspension in the gap formed between two fabrics. Coverings are usually carried out in the form of endless belts, which are deflected via rollers and in each case circulate within a specific section or section of the paper machine. The paper-side surface of the fabric carries the pulp suspension or the resultant by dewatering pulp or nonwoven web. The guided over the rollers surface of the fabric is hereinafter referred to as the running side, which provided for the transport of the pulp suspension or web paper-side surface as a useful side. For drainage, the coverings have passages through which water can be sucked from the paper-side surface to the running side.

The fabrics currently used as forming fabrics in the forming section of paper machines consist of woven material. Woven fabrics have regular structures with a repeating basic pattern. The forming fabrics are usually constructed of several layers of different thread thickness and yarn guide. Due to their different weave structure, the individual layers of such fabrics not only differ from each other in permeability to water, but lead, as formed in the paper-side layers openings or passages regularly covered by yarns underlying Weblagen, even to laterally varying permeabilities of the forming fabric and thus to a locally varying rate of dewatering of the fibrous web. The result is visible markings of the paper web with a regular pattern following the weave pattern. In addition, since lower dewatered areas of a paper web also have a lower fiber density, lateral permeability fluctuations can impair the quality of the paper web to be produced.

Woven fabrics also have a low flexural rigidity and therefore often tend to wrinkle during circulation in paper machines. The use of monofilaments of different materials such. B. a combination of yarns of polyethylene terephthalate (PET) and polyamide (PA) on the running side of a stringing leads due to the different properties of these materials with respect to water absorption, elongation, etc. often up or protruding Formiersiebkanten.

Since strings can not be woven as an endless belt, the two ends of a finite length of woven tape must be joined together to form an endless belt. In order to avoid irregularities at the joint, which can lead to markings of the paper web, the connection is made via a complicated woven seam structure in which the ends of mutually associated ends of warp and weft yarns at the connection point of the webbing are offset from each other according to a certain pattern. This connection technique is very complex and is reflected in correspondingly high production costs for woven endless coverings.

As an alternative to woven fabrics, coverings made of nonwoven webs have been proposed. In the patents CA 1 230 511 and US 4,541,895 For example, a fabric is specified, which is formed by a laminate of several layers of non-woven water-impermeable materials. For dewatering, openings are made in the laminate. The connection of the individual layers of the laminate is made flat by z. As ultrasonic welding, high frequency welding, thermal welding, bonding or chemical pretreatment of the layers. The drainage holes are made in the laminate, preferably by laser drilling brought in. The splice seam of one layer can be arranged offset to those of other layers, wherein the splice seams can also be arranged at an angle to the direction of the endless belt, in order to avoid noticeable thickening of the fabric. However, producing such film laminates in the dimensions required for forming fabrics is associated with great expense. In addition, such multilayer film laminates are relatively stiff and tend to delaminate under the conditions prevailing in the forming section of a paper machine.

If polymer tapes are used to produce coverings for paper machines, they must be stretched in the running direction of the fabric. Otherwise, the clothing is irreversibly stretched under the tensile stresses prevailing during operation and thus unusable after a short time. However, unidirectionally stretched polymer tapes are not available in the widths customary for fabrics used on industrial scale paper machines. For the production of a covering, therefore, several polymer tapes have to be laterally connected to each other. In addition, to obtain a string in the form of an endless band, the ends of the band must be joined together. At the joints or joints, the material is not stretched, whereby the fabric has a correspondingly lower mechanical stability at these points.

To solve the problem is disclosed in the patent application US 2010/0230064 proposed a fabric for use in paper machines, which is made of a helically wound polymer tape. The width of the polymer strip is substantially less than the width of the fabric produced therefrom, the longitudinal direction of the polymer strip, with the exception of the inclined position given by the winding height, coinciding with the running direction of the fabric. The mutually opposite side edges of adjacent Windungsgänge of the polymer tape are welded together to form a closed tread. Since the weld is arranged at a relatively small angle to the running direction of the fabric, the portions of the tensile stress acting transversely to the weld seam are small, so that the non-stretched material of the weld is ideally not overburdened. The production of a covering from a helical However, laid polymer tape is very complex because it requires a special welding device in which either the welding apparatus with high precision along the welding line must be performed several times around the fabric around, or the fabric must be moved with the circumferential weld line relative to the welding apparatus. In addition, the edges of the fabric must be trimmed after the welding process to obtain a uniform width stringing. As a result, the weld meets at an acute angle to one of the side edges of the fabric, which is due to the opposite to the polymer tape structurally weaker weld a point of attack for tearing of the fabric is given.

The EP1378602 further discloses a press felt constructed from a base fabric and a nonwoven structure. The press felt according to this document is constructed of a plurality of juxtaposed endless fabric tapes, each having a smaller width than the finished press felt and are joined together along their longitudinal edges. The joints where the fabric tapes are made endless, are arranged offset in the press felt in the direction of rotation to each other. The document WO 2012/123439 A2 falls under Article 54 (3) EPC and shows a covering for a paper machine with several endless belts. On the basis of the above it is therefore desirable to specify a covering for paper machines, which is designed in the form of a film, has a high mechanical stability and tensile strength, is sufficiently wide for use in industrially used paper machines, and can be produced by conventional means.

Embodiments of such fabrics for a paper machine have two or more endless belts, each of which is formed along a joint to an endlessly closed in the circumferential direction of the string foil-shaped web, wherein the endless belts are connected to each other at the side edges, that the joints of two interconnected Endless belts with respect to the direction of rotation of the fabric are offset from one another.

In this context, it should be noted that the terms used in this specification and the claims for listing features include "comprise", "comprise", "include", "contain" and "with", as well as their grammatical Modifications, generally a non-exhaustive list of features, such as process steps, facilities, areas, sizes, and the like, and in no way preclude the presence of further and other features or groupings of other or additional features.

The joint of a film-shaped web has deviating properties from the remaining web material, resulting in a lower tensile strength and higher Manifest extensibility of the joint. As a result of the offset of the joints, a tensile force acting on the clothing in the region of the joint of one of the endless belts is absorbed by the adjacently arranged unapplied film material of an adjacent endless belt and thus effectively prevents an overloading and stretching of the joint.

In advantageous embodiments, the film-shaped webs are formed from a unidirectionally stretched in the circumferential direction of the fabric polymer, whereby a high dimensional stability of the fabric is achieved in the intended use. In order to be suitable for use in paper machines, the film-shaped webs are formed in embodiments of the covering on the basis of a material comprising polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), polyetheretherketones (PEEK), polyamide (PA) or polyolefins. For use in papermaking machines, the thickness of the film-shaped webs in embodiments is further preferably selected from the range of 300 to 1600 μm, and more preferably from the range of 500 to 800 μm.

It is conceivable that the film-shaped webs are formed from an unstretched polymer and are provided to provide the tensile strength of the fabric in the direction of travel of the fabric extending filaments, in particular spirally wound threads.

The film-shaped webs are connected at least partially cohesively at the joints in order to open the joint z. B. to avoid the formation of a gap during use of the fabric. A cohesive connection is understood to mean a holding together of the connection partners by atomic or molecular forces. In further embodiments, the endless belts are integrally bonded together to provide a seamless transition between the adjacent endless belts.

In advantageous embodiments, the active surfaces of a joint and / or a lateral connection point are arranged in a staircase, so that a part of the connection surface of the tensile forces occurring does not penetrate vertically and so the dimensional stability of the connection point is increased. As active surfaces In this case, the adjoining surfaces at the connection point are designated. To increase the connection surface as well as for their better irradiation, at least one active surface of a joint and / or a lateral connection point is arranged as an inclined surface with respect to the surfaces of the clothing.

According to a further embodiment of the invention, at least one joint extends along a line running obliquely with respect to the direction of rotation, in particular straight lines. An oblique course of the joint relative to the direction of rotation should be understood to mean that the joint extends at least in sections, in particular along its entire extension, not parallel to the transverse direction of the clothing. As a result, the length of the joint can be made larger than the width of the film-shaped web, whereby the tensile force acting on the joint is distributed over a longer distance. As a result, the durability of the joint can be improved. Another advantage in the oblique course of the joint is that in a Nipdurchgang the fabric not the entire joint goes through the nip at the same time, but in each case only a small bleed. As a result, possibly caused by the joint marks are reduced, as well as the running of the fabric in the machine is quieter.

It is also conceivable that the covering comprises a plurality of superimposed and flat interconnected sheet-like webs. In this context, it is particularly conceivable that the joints of film-shaped webs arranged one above another extend obliquely to the direction of rotation and enclose different angles with the direction of rotation.

Figur 1

eine als Endlosband ausgeführte Bespannung in einer schematischen Perspektivdarstellung zeigt,

Figur 2

den Aufbau einer als Endlosband ausgeführten Bespannung aus mehreren zu Endlosbändern gefügten folienförmigen Bahnen in einer Perspektivdarstellung schematisch veranschaulicht,

Figur 3

folienförmige Bahnen mit unterschiedlich ausgeprägten Seitenkanten schematisch darstellt,

Figur 4

eine zu einem Endlosband gefügte folienförmige Bahn in einer schematischen Perspektivdarstellung zeigt,

Figur 5

zwei Beispiele einer Kantenformung zur Herstellung einer Stoß an Stoß Fügung illustriert,

Figur 6

eine treppenförmige Kantenformung zur Herstellung einer profilierten Fügung vorstellt,

Figur 7

eine Nut-und-Feder Profilierung von Fügekanten zeigt,

Figur 8

eine erste Anordnung zum Transmissionslaserverschweißen zweier aneinandergrenzender Kanten in einer schematischen perspektivischen Darstellung zeigt,

Figur 9

eine zweite Anordnung zum Transmissionslaserverschweißen zweier aneinandergrenzender Kanten in einer schematischen Querschnittsdarstellung zeigt und

Figur 10

eine folienförmige Bahn mit einer schräg zur Umlaufrichtung verlaufenden Fügestelle zeigt.

Further features of the invention will become apparent from the following description of embodiments in conjunction with the claims and the accompanying drawings. It should be noted that the invention is not limited to the embodiments of the described embodiments, but is determined by the scope of the appended claims. In particular, in the case of embodiments according to the invention, the features mentioned in the embodiments explained below can be realized in a number and combination that deviate from the examples. In the following explanation of some embodiments of the invention is on the attached figures, of which

FIG. 1

shows a running as an endless belt covering in a schematic perspective view,

FIG. 2

schematically illustrates the construction of an endless belt-shaped covering made of a plurality of film-shaped webs joined to endless belts in a perspective view,

FIG. 3

schematically shows film-shaped webs with differently pronounced side edges,

FIG. 4

shows a sheet-like sheet joined to an endless belt in a schematic perspective view,

FIG. 5

illustrates two examples of edge forming for making a butt joint

FIG. 6

presents a step-shaped edge formation for producing a profiled joint,

FIG. 7

shows a tongue-and-groove profiling of joint edges,

FIG. 8

shows a first arrangement for the transmission laser welding of two adjacent edges in a schematic perspective view,

FIG. 9

shows a second arrangement for transmission laser welding two adjacent edges in a schematic cross-sectional view and

FIG. 10

shows a film-shaped path with an oblique to the direction of rotation joint.

In the figures, the same or similar reference numerals for functionally equivalent or similar characteristics are independent of specific embodiments used.

FIG. 1 shows a schematic representation of a fabric 1 for use in papermaking machines. The width of the fabric 1 is limited by the side edges 2 and 3. The two side edges are self-contained and arranged substantially parallel to each other. The fabric 1 is therefore also referred to as endless clothing. The direction in which the endless covering 1 is closed in itself is referred to below as the running direction LR or circumferential direction LR of the covering 1 and is illustrated in FIG. 1 by means of a curved double arrow. The direction along the shortest connection between the two side edges 2 and 3 is referred to as the transverse direction QR and is in FIG. 1 also indicated by a double arrow graphically. The fabric 1 has a useful surface 5, which serves to transport the pulp suspension or web during papermaking, and is also referred to as the paper-side surface 5 of the fabric 1. The useful surface 5 of the fabric 1 usually forms the outwardly directed surface of the fabric 1. The volume enclosed by the covering 1 volume, inwardly directed surface is referred to in this document as the running side 6. It is usually on the (not shown in the figures) rollers, which cause the circulation of the fabric 1. The directions pointing from the running side to the paper-side surface of the clothing 1 are referred to below as the vertical direction of the clothing 1. The promotion of pulp suspension or fibrous web on the fabric 1 takes place on the effective surface 5 in the direction indicated by an arrow machine direction MR.

FIG. 2 illustrates the structure of a as in FIG. 1 shown endless cover 1 of several sheet-shaped webs. Im in FIG. 2 In the embodiment shown, the covering 1 is constructed from three film-shaped webs 10, 20 and 30 arranged side by side in the transverse direction QR. The number of film-like webs used or required for the construction of a clothing 1 is determined by the width of the clothing 1, ie its extension in the transverse direction QR, and the width of the film-shaped webs available for its production. Correspondingly, the number of film webs arranged side by side to produce a covering 1 may differ from that in FIG FIG. 2 shown embodiment only two, but also more than three be. Furthermore, not all film webs must be the same width. Rather, 1 different widths of film webs can be joined together to form a fabric, for example, so that the outer film webs 10 and 30 are shortened in the transverse direction QR to obtain a certain predetermined width of the fabric 1. If the tension applied in the intended application of the covering 1 varies along its transverse direction QR, the width of the individual film-shaped webs 10, 20 or 30 can be optimized for the local tensile load, for example by selecting a smaller width of the film-shaped web at higher tensile load becomes.

The individual film-shaped webs 10, 20 and 30 are constructed monolithically, which is to be understood in this document that the webs apart from a possible surface coating consist of one piece, so in particular are not constructed in multiple layers. The film webs 10, 20 and 30 may be perforated depending on the application, d. H. they have vertically penetrating holes, for example for dewatering the fibrous web.

Each of the film webs used to produce a covering 1 has, as in the representations a) and b) of FIG. 3 is shown, two its extension in the transverse direction QR limiting side edges. In the representation in a) of FIG. 3 shown film-shaped web 10, these are the side edges 12 and 13, in the representation in b) of FIG. 3 The film webs 10 and 20 shown, the side edges 12 and 13 or 22 and 23. Usually, the side edges of the film-shaped webs 10, 20 and 30 as in the Figures 2 and 3a ) illustrates formed in a straight line. To the toothed connection of two adjacent webs, as in FIG. 3b ), the side edges 13 and 22 to be joined may also run along a two-dimensional line, for example along a serpentine line or a wavy line.

To form an endless covering 1, each of the individual film-shaped webs 10, 20 and 30 is preferably first joined along a joint 11, 21 and 31 to form an endless belt. The schematic representation of FIG. 4 shows a joined at a joint 11 to an endless belt sheet-shaped web 10. The joint 11 connects the two end edges of the film-shaped Bahn 10. Under front edges here are a film-shaped web 10 between the side edges 12 and 13 limiting edges to understand that limit its longitudinal extent and thus form the ends of the web. The end edges can be arranged as shown in the figures perpendicular to the course of the side edges. However, they can also be aligned obliquely to this and instead of a straight course also have a curved curve.

The joining of the ends of a film web 10 can be done using different joining techniques such as gluing, calendering and in particular welding. For welding the two web ends, an ultrasonic welding process or a transmission laser welding process can be used. During transmission laser welding, the contacting surfaces of the two ends of the track by using a NIR laser are melted (laser having an emission wavelength in the n Ahen I nfra otbereich r) and pressed together. Since the material of the film strips 10, 20, 30 does not absorb the light of an NIR laser, the surfaces to be melted must first be provided with an absorber coating, wherein it is usually sufficient only one of two contact surfaces at the joint with the NIR Laser light absorbing material to coat. The absorber coating absorbs, heats up the light of the NIR laser used for welding, and subsequently melts the surface regions of the tail ends adjacent thereto. By pressing together the melted areas, a cohesive connection is finally made.

As lasers for NIR transmission welding are, for example, diode lasers with emission wavelengths in the range of 808 to 980 nm and Nd: YAG laser with an emission wavelength of 1064 nm. Preferably, lasers with emissions in the range of 940 to 1064 nm are used.

The two end edges of a film-shaped web 10 can be added butting or using a profiling of them forming end faces. Under impact to impact is a meeting perpendicular or obliquely to the useful or running side extending end faces of a film web 10 to understand. FIG. 5 illustrates two examples of a butt joint joining the two abutting edges 14 and 15 of a film-shaped web 10, the cross-sectional representations illustrate the oppositely disposed end faces 14 and 15 respectively in the unfastened (left) and joined (right) state. Before having one of the two end faces can be provided with an absorber layer 9, as shown, which absorbs the welding light used and thereby causes the melting of the two end faces. Alternatively, both end faces 14 and 15 may be coated with an absorber material. In the illustrated in the illustrations a) joint 11, the end faces 14 and 15 are arranged perpendicular to the two surfaces of the film-shaped web 10. The irradiation of the welding light is in this case preferably oblique to the adjacent end faces 14 and 15 and thus obliquely to the two surfaces of the film-shaped web 10. In perpendicular to one of the two surfaces of the film web 10 irradiated welding light, the two end faces are preferably as in Presentation b) of FIG. 5 is shown, obliquely to the surface and thus also arranged obliquely to the irradiation direction of the light. In such an oblique arrangement of the end faces, the joint 11 has a larger area, whereby the tensile load per unit area is reduced when tensioning the film-shaped web 10.

About a profiling of the end faces 14 and 15, the surface of the joint 11 can be further increased and their elongation under tensile load can be further reduced. At the in FIG. 6 illustrated example, the two web ends or abutting surfaces 14 and 15 of a film web 10 on a mutually complementary step profiling. Again, an absorber layer 9 can be used to absorb the welding light again. To achieve a high strength, the step length is preferably a multiple of the film thickness. Step lengths in the range of 5 to 150 mm are advantageous, with step lengths of about 20 mm being preferred. Multiple levels are also possible. Notwithstanding the in FIG. 6 In the illustrated embodiment, the steps of the profile may also be inclined, whereby a good illumination of the end faces 14 is achieved with the welding light directed perpendicular to the surface of the film-shaped web 10. The angle between the inclined ramps and the intermediate plateau of such grading preferably has a value in the range of 45 to 60 degrees, with an angle of 60 degrees being preferred.

Another example of a butt edge profiling shows the FIG. 7 , At this Embodiment, the joint surfaces to be joined 14 and 15 of the film web 10 are prepared in the form of a complementarily shaped tongue and groove profile, groove and spring are preferably performed as shown with a slight taper to allow easy telescoping. This profile shape is characterized in particular by a great security against unwanted vertical offset of the two web ends when connecting. The spring length or groove depth can exceed the film thickness. As before, an absorption layer 9 can also be applied to one or both abutment surfaces 14 and 15 in this profile design in order to facilitate the bonding of the surface substrate ends by locally concentrated absorption of the welding light. If the abutting surfaces 14 and 15 of the film web ends are joined together by means of ultrasonic welding, no absorber coating 9 is required.

When joining the film web ends using an NIR transmission welding process, the individual film strips are preferably made of a polymer that is transparent to the wavelengths of light used for welding. As film-shaped webs are therefore advantageous z. B. produced by extrusion or casting sheet-like thermoplastic substrates such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), polyetheretherketones (PEEK), polyamide (PA), polyolefins and polyimides (PI) used. These materials are known in the form of uniaxially stretched plates or rolls and are commercially available. Film web thicknesses from the range of 150 to 1600 μm and in particular from the range of 500 to 800 μm are used for the production of clothing 1 for paper machines. When welding the end faces of uniaxially stretched film webs 10, the material structure within the joining zone 11 z. B. disturbed by recrystallization, whereby the joining zone is mechanically and chemically less resilient and thus may result in the intended use undesirable ripples and distortions at the joining zone 11. In the production of endless coverings 1, the joining zones 11, 21 and 31 of the individual endless belts 10, 20 and 30, etc., therefore, as in FIG. 2 illustrated with respect to the direction of rotation LR of the fabric arranged offset relative to each other. This staggered arrangement relieves the individual joints by the on the covering 1 acting tensile forces in the amount of joints of the undisturbed film material of the adjacent adjacent tracks are added. An elongation of the joints is so effectively prevented, so that the continuous covering in normal operation no ripples or warping is formed.

The transverse to the direction of rotation LR acting on a fabric tension forces 1 are substantially less than the longitudinal thereto, so that in normal operation, no expansion of the joints between the individual endless belts 10, 20 and 30 occurs. The connection of adjacent endless belts can be done by joining the front edges of the film-shaped webs by means of ultrasonic welding or transmission laser welding. The connection of two side edges 13, 14 can be done analogously to the end edges of a film web abutting or using a profiling of the side edges forming edge surfaces.

The schematic representation of FIG. 8 shows an arrangement for the surface transmission laser welding of the two endless belts 10 and 20 at their side edges. The adjoining edge surfaces are chamfered, so that the perpendicular to the surfaces of the endless belts 10 and 20 irradiated NIR laser light 61 impinges laterally on the edge surfaces. At least one of the two edge surfaces is provided with an absorber coating. In the illustrated welding arrangement, the fan-shaped light beam 61 emitted by a laser 60 is linearly converged onto the connecting surface 50 via a roller 63 transparent to the wavelength used by the film material of the endless belts 10 and 20 that is transparent to the laser light. The laser energy concentrated in this way is absorbed at the connection surface 50 in the region of the line 62 and converted into thermal energy. The transparent roller 63 presses with a predetermined force on the surfaces of the endless film webs 10 and 20, so that the two webs are pressed together in the area around the line-shaped melting zone 62. By moving the laser 60 and the transparent pressure roller comprehensive irradiation arrangement relative to the connecting surface 50 and vice versa by corresponding displacement of the two endless belts 10 and 20 relative to the irradiation arrangement, the two endless belts 10 and 20 in the region of the connecting surface 50 over the entire surface and materially connected to each other.

In an alternative transmission laser welding process, as in FIG. 9 is schematically illustrated, the connecting surface 50 in the formed between two rollers 64 and 65 nip so passed through that abutting the connecting surface 50 edge surfaces of the film-shaped webs 10 and 20 are pressed together. In the illustrated arrangement, the connecting surface 50 passes through the nip in the transverse direction QR for reasons of clarity. Usually, however, the rollers 64 and 65 are like the transparent roller of FIG. 8 arranged so that the connecting surface 50 is guided in the direction LR by the nip between the rollers 64 and 65. Preferably, the laser source 60 irradiates the portion of the bonding surface 50 located in the nip over its entire extent in the transverse direction QR.

A covering 1 joined according to the above embodiments from a plurality of film-shaped webs can be manufactured using conventional joining techniques in any widths and thus adapted to the requirement of a respective paper machine. A fabricated as described above fabric 1 has a high mechanical stability and tensile strength and does not tend in normal operation to the formation of ripples or warping.

The FIG. 10 shows a film-shaped web 10 with a running obliquely to the direction of rotation LR joint 11. This means that the joint is not parallel to the transverse direction QR of the film-shaped web 10 extends.

Claims (10)

1. Clothing for a paper machine having two or more endless belts which are in each case along a joint (11, 21, 31) formed to a closed film/foil-shaped web (10, 20, 30) that in the revolving direction of the clothing (1) is endless, wherein the respective joint (11, 21, 31) connects the two end edges of the respective film/foil-shaped web (10, 20, 30) and the end edges are those edges which delimit the film/foil-shaped web (10, 20, 30) between the lateral edges thereof and which delimit the film/foil-shaped web (10, 20, 30) in terms of the longitudinal extent thereof and thus form the ends of the web, wherein the film/foil-shaped webs (10, 20, 30) are planar substrates of monolithic construction which are produced from a thermoplastic plastics material by extruding or casting, having a thickness in the range from 150 to 1600 µm, and which at the joints (11, 21, 31) are at least in part connected in a materially integral manner such that opening of the respective oint is avoided during the use of the clothing, wherein the endless belts at the lateral edges (12, 13, 22, 23) are interconnected such that the joints (11, 21, 31) of two interconnected endless belts are disposed so as to be mutually offset in relation to the revolving direction of the clothing (1), wherein the effective surfaces of a joint (11, 21, 31) and/or of a lateral connection point (50) that interconnects lateral edges (12, 13, 22, 23) are profiled.
2. Clothing according to Claim 1, wherein the film/foil-shaped webs (10, 20, 30) are formed from a polymer that is unidirectionally oriented in the revolving direction of the clothing (1).
3. Clothing according to Claim 1, wherein the film/foil-shaped webs (10, 20, 30) are formed from a non-oriented polymer, and threads, in particular helically wound threads, that extend in the revolving direction of the clothing are provided for providing the tensile strength of the clothing.
4. Clothing according to one of the preceding claims, wherein the film/foil-shaped webs (10, 20, 30) are formed so as to be based on a material which is selected from one of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), phenylene sulfide (PPS), polyether ether ketone (PEEK), polyamide (PA), or polyolefins.
5. Clothing according to one of the preceding claims, wherein the thickness of the film/foil-shaped webs (10, 20, 30) is selected from within the range from 500 to 800 µm.
6. Clothing according to one of the preceding claims, wherein the endless belts are at least in part interconnected in a materially integral manner.
7. Clothing according to one of the preceding claims, wherein effective surfaces of a joint (11, 21, 31) and/or of a lateral connection point (50) are disposed in a stepped manner.
8. Clothing according to one of the preceding claims, wherein at least one joint extends along a line, in particular a straight line, that runs diagonally in relation to the revolving direction.
9. Clothing according to one of the preceding claims, wherein the clothing comprises a plurality of film/foil-shaped webs which are disposed on top of one another and are interconnected in a planar manner.
10. Clothing according to Claim 9, wherein the joints of webs that are disposed on top of one another run diagonally in relation to the revolving direction and enclose different angles in relation to the latter.

Images