DE29903327U1 - Strip-shaped material web for a ridge or ridge cover and device for producing the same - Google Patents

Abstract

The strip (10) is a resilient multilayer composite. A flexible, resilient substrate sheet (100) is attached by thermal- or ultrasonic welding at points or lines, to nonwoven sheets (101, 102) forming cavities (104). Plastic edge strips are deformed to a wavy profile and bonded to the surface over their entire area. Independent claims are included for the method of making the strip and the plant used for the purpose. Preferred features: The substrate (10) is tri-layered, with wavy lining as described. Peaks and troughs of nonwoven material extend perpendicularly with respect to the strip, and are locally-connected at the troughs.

Description

Description: G 98 025i

Peter Wirz
53721 Siegburg

Strip-shaped material sheet for a ridge or hip covering and device for producing the same

The invention relates to a strip-shaped material web for a ridge or hip covering with a rain and drifting snow-proof carrier web, which has a width corresponding to the width of the material web and in which a plastically deformable edge strip is applied at least in the area of the outer longitudinal edges of the carrier web, such that the carrier web provided with the edge strips can be adapted to roof covering panels.

Strip-shaped material webs of the generic type are known in various designs for covering ridges or hips of building roofs and are used to seal the interior of the roof against rain and drifting snow.

A strip-shaped material web of this type is known from EP 0 341 343 A2. It has a central strip made of a water-repellent and snow-proof fleece that allows air to pass through and side strips made of stretchable polyisobutylene film strips with embedded expanded metal mesh that can be adapted to the top of roof covering panels. However, this expanded metal mesh incorporated into polyisobutylene film strips causes a great deal of production effort and high manufacturing costs, so that the economic efficiency of the known strip-shaped material web appears to be in need of improvement.

From EP O 610 324 B1 a ridge sealing strip is known which has corrugated plastically deformed edge strips made of metal which are fastened to the side strips in such a way that air passage channels are formed in the width direction of the ridge sealing strip.
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The invention has set itself the task of proposing a strip-shaped material web of the type mentioned at the beginning for a ridge or hip cover, which can be produced with significantly reduced effort and cost compared to the known ridge or hip covers and, in addition, enables good sealing of the roof interior against rain and drifting snow.

This object is achieved with a strip-shaped material web according to the characterizing features of claim 1.

Advantageous embodiments of the strip-shaped material web according to the invention are specified in subclaims 2 to 16.

A device for producing the strip-shaped material web according to the invention is specified in claims 17 to 21.

The strip-shaped material web according to the invention has a rain- and drifting snow-proof carrier web made of a composite material that is elastically stretchable in at least one direction and has a multi-layer structure, in which one layer is formed from an elastic and flexible carrier film and at least on one side of the carrier film, as a further layer, a nonwoven web is provided that is connected to the carrier film to form hollow spaces, wherein the nonwoven web is connected to the carrier film in point or line-shaped areas by means of thermobonding or ultrasonic welding and the edge strip is formed from a plastically deformable plastic film and is wave-shaped in the longitudinal extension of the material web and is connected to the carrier web over its entire surface.

The invention teaches that an elastic carrier sheet equipped with a wave-shaped edge strip, in which the carrier sheet is fully connected to the edge strip and in this bonding area is also wave-shaped and runs, can be easily adjusted by hand to the course of the roof covering panels. Due to the wave-shaped course of the edge strip with the carrier sheet, this has a large number of kinks or bends at short intervals one after the other in the longitudinal direction, each of which is already based on a plastic deformation of the plastic film forming the edge strip. Further deformation, for example when the edge strip is pressed against the course of the roof covering panels, causes further deformations, which may still be elastic in the case of a flat plastic film, but cause further plastic deformations in the case of the wave-shaped and plastically deformed edge strip according to the invention. Due to the full-surface connection of the wave-shaped edge strip with the carrier sheet in the area of the longitudinal edges, the latter also takes on this wave-shaped shape, at least in the area of the longitudinal edges, and can also be adjusted by hand to the shape of the roof covering panels.

The edge strips are preferably glued to the carrier web, e.g. using a suitable thermally activated adhesive, such as a hot melt adhesive or using suitable pressure-sensitive adhesives.

The carrier webs used in the context of the invention with a multi-layer structure made of a carrier film and nonwoven webs attached to the carrier film are known in principle, but have so far been used mainly for the production of diapers and similar hygiene articles. Depending on the design, a nonwoven web is provided on only one side of the carrier film or the carrier film is connected to a nonwoven web on both sides and embedded between them, so that the carrier web has a three-layer structure in which the

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The carrier film forms the inner layer and the two nonwoven webs each form an outer layer.

Examples of the production of such a composite material used as a carrier web in the context of the invention are given in DE 196 04 956 A1, DE 42 43 012 C2 and DE 42 38 541 A1. The fastening of the nonwoven webs to the carrier film with the formation of hollow spaces is essentially achieved by the fact that the nonwoven webs, in contrast to the carrier film, have reduced or no elasticity and the nonwoven webs and/or the carrier film are stretched in at least one direction. The nonwoven webs are connected to the carrier film in dot or line areas by means of thermobonding and/or ultrasonic welding and the bond thus formed is relaxed. Due to their low elasticity, the nonwoven webs remain in the length they had before relaxation, while the elastic carrier film returns to its original dimensions before stretching, causing the nonwoven webs to curl and bulge between the connection points of the nonwoven webs to the carrier film, and hollow spaces to form. As already mentioned, these known composite materials have so far been used primarily to manufacture diapers and similar hygiene materials, whereby these composite materials have a particularly high and easily controllable elasticity, which is automatically limited by the nonwoven webs when a predetermined stretch is reached, in which they are brought from their corrugated position into a stretched extension, so that the breaking elongation limit of such a composite material is not normally reached.

Within the scope of the invention, it has now been found that these composite materials known from diaper production can be used with great advantage as a rain and drifting snow-proof carrier sheet for a strip-shaped material sheet for a ridge or hip covering of the type mentioned at the beginning,

if they are fully connected at their longitudinal edges to the previously explained wave-shaped edge strips made of a plastically deformable plastic film. The strip-shaped material sheet obtained in this way for a ridge or hip cover has a high level of rain and drifting snow resistance and high mechanical strength. Due to the high elasticity of the carrier sheet, the strip-shaped material sheet according to the invention is particularly easy to handle and can also be laid in a simple manner in hard-to-reach ridge or hip areas of building roofs, as well as rolled up into rolls before use, which makes it easier to handle and transport.

Of course, it is also possible within the scope of the invention to arrange the wave-shaped plastic deformation of the edge strips in a direction deviating from the longitudinal extension, e.g. transversely to the longitudinal extension of the edge strips.

The main advantage of the strip-shaped material sheet designed according to the invention for a ridge or hip cover is that it consists of a combination of a carrier sheet with film and fleece layers as well as edge strips made of a plastically deformable plastic film, whereby the manufacturing costs are significantly reduced compared to the known strip-shaped material sheets with expanded metal inserts or edge strips made of metal, without the sealing against rain or drifting snow or the plastic deformability of the strip-shaped material sheet for adaptation to the top of the roof covering panels being reduced compared to the known ridge or hip cover sheets. Disposal and recycling of the material sheet according to the invention is also easier because it does not require metal reinforcements and/or edge strips.

A preferred embodiment of the invention provides that the nonwoven webs of the carrier web have a wave-shaped course and are partially

the carrier film. The wave crests and troughs of the fleece webs preferably extend perpendicular to the carrier film. This meandering course gives the carrier web used according to the invention a particularly high elasticity, which is abruptly terminated by the fleece webs when a predetermined stretch is reached. The connection of the wave-shaped fleece webs to the carrier film takes place in the area of the wave troughs of the fleece webs, according to an advantageous embodiment of the invention.

The carrier film of the carrier web is preferably made from a rubber-elastic thermoplastic elastomer. For example, the carrier film can be made from a polyethylene/polyethylene copolymer or from block copolymers of the type A-B-A'. The thickness of the carrier film is advantageously 0.01 to 0.08 mm.

According to a further advantageous embodiment of the invention, it can also be provided that the carrier film of the carrier web is perforated in order to allow water vapor to pass through. The perforations can be designed in such a size that water vapor can pass through, but water drops or drifting snow are prevented from passing through. This can be achieved, for example, by means of needle rollers during the connection of the carrier film to the fleece webs. Such a strip-shaped material web enables moisture to be removed from the interior of the roof as a ridge or hip cover while at the same time being rain and drifting snow-tight.

The nonwoven webs of the carrier web used according to the invention are advantageously made on the basis of polyolefins, such as polypropylene or a polyester. Nonwovens produced using different processes can be used, such as nonwovens made from continuous filaments or those made from melt-blown microfibers or combinations thereof.

A further advantageous embodiment of the strip-shaped material web according to the invention provides that a reinforcing strip is applied, e.g. glued, in the middle area of the carrier web. This reinforcing strip is placed on the ridge or hip beam together with the middle area of the carrier web and fixed to it using nails or the like. This fixing then takes place through the reinforcing strip, so that on the one hand the fixing is improved and on the other hand tearing of the carrier web in this area is prevented.

Preferably, the plastically deformable edge strips and/or the reinforcing strips are made of a plastic film based on polyolefins, such as polypropylene, a high-density polyethylene (HD polyethylene) or a low-density polyethylene (LD polyethylene) or a soft PVC in a thickness of 40 to 100 μm. This produces a strip-shaped material web according to the invention, the production costs of which are significantly reduced compared to those with edge strips based on metal or expanded metal.

In order to facilitate the fixing of the strip-shaped material web according to the invention through the reinforcing strip applied in the central region, according to a further advantageous embodiment of the invention, the reinforcing strip can be perforated, for example it has a series of holes at a constant distance, through which fixing nails can be driven into the ridge or hip beam.

In order to improve the fixing and adjustment of the longitudinal edges of the strip-shaped material web according to the invention on the upper side of the roof covering panels, self-adhesive strips based on bitumen or butyl rubber can also be applied to the carrier web in the area of the longitudinal edges of the carrier web on the side facing away from the edge strips. These self-adhesive

Adhesive strips based on bitumen and/or butyl rubber have a high level of weather resistance, which is advantageous for applications in the construction sector. A modification of the bituminous starting material using polyolefins is preferred, as this allows the self-adhesive strips to be made elastically deformable and temperature-resistant over a wide temperature range, so that they are temperature-resistant and processable in a temperature range of -20 ⁰ C to +100 ⁰ C, for example. Furthermore, the plasticity and thermomechanical behavior of the bitumen is increased by the addition of polyolefins.

Of course, it is also possible within the scope of the invention to apply other self-adhesive and elastically deformable pressure-sensitive adhesives in strip form to the carrier web in the sense of the invention. In particular, natural and synthetic rubbers, polyacrylates, polyesters, polychloroprenes, polyisobutenes, polyvinyl ethers, polyolefins and polyurethanes are considered suitable for this purpose. These pressure-sensitive adhesives can be used if required in combination with additives such as resins, bitumen, plasticizers and/or antioxidants to form the self-adhesive strips for the strip-shaped material web according to the invention. It is also possible to apply a self-adhesive layer in a viscous state to the carrier web in the form of an adhesive bead using application nozzles instead of applied self-adhesive strips.

The handling of the strip-shaped material web according to the invention can be increased according to a further development of the invention by covering the adhesive strips with a removable cover strip made of a plastic film or siliconized paper. Before the longitudinal edges of the strip-shaped material web according to the invention are placed on the top of the roof covering panels, the cover strip is removed so that the adhesive strips are accessible and can be stuck onto the roof covering panels.

The edge strips and the reinforcing strip of the strip-shaped material web according to the invention are preferably applied to the same side of the carrier web, but it is also possible within the scope of the invention to apply the edge strips to one side of the carrier web and the reinforcing strip to the other side of the carrier web or to both sides.

After laying the strip-shaped material sheet according to the invention as a ridge or hip cover, usually at least the longitudinal edges of the carrier sheet and the edge strips are exposed to sunlight, since they protrude from under the roof covering panels. For this purpose, it can be advantageous for the strip-shaped material sheet according to the invention to be UV-resistant at least in some areas, preferably in the area exposed to sunlight. For example, the material sheet 5 according to the invention can be stabilized and/or pigmented to improve its weathering stability.

A method for producing the strip-shaped material web according to the invention for a ridge or hip cover is characterized in that the plastic film forming the edge strips is guided through a first roller gap formed between two rollers, whereby at least one of these rollers has a surface profile in the form of elevations and/or depressions and the plastic film is plastically deformed in a wave-like manner to form the edge strips under the influence of pressure and heat when it is guided through the first roller gap and the deformed edge strips are then fed together with the carrier web to a second roller gap formed between two rollers, and at least one of these rollers has a surface profile corresponding to the rollers of the first roller gap and the longitudinal edges of the carrier web are fully bonded to the deformed edge strips when it is guided through the second roller gap under the influence of pressure and heat while maintaining the deformation of the edge strips.

According to an alternative embodiment of the method, it can also be provided that at least the longitudinal edges of the carrier web and the plastic films forming the edge strips are guided together through a roller gap formed between two rollers, whereby at least one of the rollers has a surface profile in the form of elevations and/or depressions and the plastic film and the carrier web are deformed in a wave-like manner to form the edge strips together with the carrier web in the connection area under the influence of pressure and heat when they are guided together through the roller gap, whereby the edge strips are plastically deformed in a wave-like manner and are fully connected to the carrier web. As a result, the carrier web also takes on the wave-like shape of the edge strips on its longitudinal edges in the connection area, so that the carrier web provided with the edge strips can be plastically adapted to the shape of the roof covering panels. In this case, the edge strips are connected to the carrier web at the same time as they are deformed when they pass through the roller gap, so that the number of operations required to produce the strip-shaped material web according to the invention is minimized, which enables particularly economical production of the strip-shaped material web according to the invention.

As a further alternative, it may also be provided that the carrier web and the plastic films forming the edge strips are connected in advance in an undeformed state and then guided together through the roller gap, whereby the wave-shaped deformation of the edge strips and the associated longitudinal edges of the carrier web is brought about.

It can also be provided that an adhesive is applied to the plastic film forming the edge strips and/or the carrier web before passing through the roller gap that creates the full-surface connection between the edge strips and the carrier web, and that the edge strips and the carrier web are glued together when passing through this roller gap.

glue together over the entire surface. The bonding of the carrier web to the edge strips can be achieved, for example, by means of a coating made of a hot melt adhesive or similar that can be thermally activated in the roller gap and applied to the edge strips and/or the carrier web before joining.
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It can also be provided that both rollers forming a roller gap are designed with surface profiles in the form of elevations and/or depressions and that the rollers with their surface profiles interlock, for example meshing with one another in the manner of gears.

Advantageously, at least one of the rollers forming the roller gap, which effect the plastic deformation of the edge strips, is heated to a temperature sufficient for the plastic deformation and/or connection of the edge strips to the carrier web.

This means that an adhesive applied to the edge strips, for example, can be thermally activated to bond the edge strips to the carrier web. The heat supply can also be so great that additional adhesives can be dispensed with entirely and the edge strips are bonded to the carrier web by themselves as a result of the heating by the heated roller.

Of course, it is also possible to increase the heat supply by means of radiant heaters or similar heat sources arranged in front of the rollers forming the roller gap for plastic deformation of the edge strips and/or connection to the carrier web with or without adhesive.

The plastic deformability and connection of the edge strips with the carrier web can be further increased by at least guiding the plastic films forming the edge strips around the heated roller before passing through the roller gap so that sufficient heating can take place. In the direction of passage through

Viewed from the roller gap, the heated roller then forms the first roller, with which the plastic films forming the edge strips come into contact. The plastic films to be plastically deformed into the edge strips are preferably guided directly against the heated first roller, which further improves the heating of the same.

After the carrier web has been connected to the edge strips, reinforcement strips in the middle area and/or self-adhesive strips in the area of the longitudinal edges of the carrier web are fed to the side facing away from the edge strips and applied to them in the desired areas.

Here too, the reinforcement strip is applied to the carrier web either by pressure and heat or by using an adhesive, as already explained for the edge strips 5.

A device for producing the strip-shaped material according to the invention I bah &eegr; for a ridge or hip cover is characterized in that a first pair of rollers is provided with two rollers forming a first roller gap, at least one of the rollers having a surface profile in the form of elevations and/or depressions and the plastic film forming the edge strips can be fed to the first roller gap in such a way that it can be plastically deformed in a wave-like manner when passed through the roller gap and a second pair of rollers with two rollers forming a second roller gap is provided downstream of the first pair of rollers, through which the wave-like deformed edge strips can be passed together with the carrier web, the rollers having a width corresponding to the width of the carrier web and the end regions of the rollers, between which the longitudinal edges of the carrier web are passed through the second roller gap together with the edge strips, are thickened and at least the thickened end regions of a roller are provided with a surface profile corresponding to the at least one

profiled roller of the first roller pair are designed with a surface profile corresponding to that of the profiled roller, so that the edge strips and the longitudinal edges of the carrier web can be fully connected to one another while the deformation of the edge strips is maintained when passing through the second roller gap.

Alternatively, it can also be provided that the device for producing the strip-shaped material web for a ridge or hip cover according to the invention has only one pair of rollers, with a roller gap being formed between the rollers and feed devices being provided for feeding the carrier web and the plastic film forming the edge strips to the roller gap. These are arranged in such a way that the longitudinal edges of the carrier web can be connected to the edge strips when passing through the roller gap under the influence of pressure and heat. In order to connect the edge strips to the carrier web in accordance with the invention and at the same time to deform them in a plastically undulating manner along their length, it is proposed that the rollers have a width corresponding to the width of the carrier web and that the end regions of the rollers, between which the longitudinal edges of the carrier web with the edge strips are guided through the roller gap, are thickened and at least the thickened end regions of a roller are designed with a surface profile in the form of elevations and/or depressions, so that the edge strips and at least the longitudinal edges of the carrier web are deformed in a wave-like manner when passing through the roller gap, whereby the edge strips undergo plastic deformation and, on the other hand, the edge strips are connected to the carrier web over their entire surface.

According to a further embodiment of the device according to the invention, it is provided that both rollers forming a roller gap are provided with a surface profile in the form of elevations and/or depressions

are designed and the rollers with their surface profiles are arranged so as to engage one another.

In order to heat the plastic film forming the edge strips to the temperature required for plastic deformation and connection to the carrier web before it passes through the roller gap, at least one of the rollers forming the roller gap, by means of which the plastic deformation of the edge strips can be effected, can be designed to be heated. This heating can serve to thermally activate an adhesive applied to the edge strips or to cause the edge strips themselves to bond to the carrier web. For this purpose, additional heaters or similar heat sources can be provided in front of the roller gap if necessary.

The invention is explained in more detail below using exemplary embodiments in the drawing.

Show it:

Figure 1 shows in perspective the view of a

strip-shaped material web according to the invention for a ridge or hip covering,

Figure 2 shows a section through the strip-shaped material web according to

Arrows B - B in Figure 1,

Figure 3 shows the section through the carrier web according to arrows A - A in Figure 2,

Figure 4a shows a schematic representation of a device for producing the strip-shaped material web according to the invention,

Figure 4b shows a schematic representation of another embodiment of a device for producing the strip-shaped material web according to the invention,

Figure 5 shows a schematic representation of a pair of rollers for producing the

strip-shaped material web according to the invention,

Figure 6 shows a schematic side view of the roller pair

according to arrow V in Figure 5.

Figure 1 shows a strip-shaped material sheet 1 for a ridge or hip cover. It comprises a rain and drifting snow-proof carrier sheet 10 running across the entire width of the material sheet 1 with a central region 10a and longitudinal edges 10b adjoining the central region. In the illustration according to Figure 1, along the longitudinal edges 10b of the carrier sheet 10, edge strips 12 that are plastically deformed in a wave-like manner are applied to the upper side in the longitudinal extension L and a reinforcing strip 11 is applied in the central region 10a of the carrier sheet 10. In the area of the side of the carrier sheet 10 facing away from the edge strips 12, self-adhesive strips 13 are attached to the longitudinal edges 10b of the carrier sheet 10.

The carrier web 10, which is shown enlarged in Figure 3, consists of an elastically stretchable composite material with a multi-layer, here three-layer structure. An elastic and flexible carrier film 100 is provided as the inner layer, which is made, for example, from a thermoplastic elastomer, such as a PE/PE copolymer with a thickness of 0.04 mm. The outer layers of the carrier web 10 are each formed by a nonwoven web 101, 102, for example made of continuous filaments based on polypropylene, connected to the carrier film 100 to form hollow spaces 104 running continuously transversely to the longitudinal extension of the strip-shaped material web 1. The nonwoven webs 101, 102 are connected by means of

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The carrier film 100 is connected to the carrier film 100 by means of spot welding surfaces 103 arranged in a grid-like manner in some areas using the so-called thermobonding process, whereby the fleece webs have a meandering or wave-like course and are connected to the carrier film 100 to form the hollow spaces 104. The wave crests B and wave troughs T of the wave-shaped fleece webs 101, 102 run approximately perpendicular to the carrier film 100 and are connected to the carrier film by means of spot welding in the area of the wave troughs T. The carrier web 10 has a high elasticity, particularly transversely to the longitudinal extension of the hollow spaces 104, i.e. in the direction of the arrows S in Figure 3. In the present exemplary embodiment, the orientation of the high elasticity of the carrier web 10 according to the direction of the arrow S is selected so that it points in the longitudinal extension L, so that the carrier web 10 is particularly elastic in the longitudinal direction L.

In order to achieve water vapor permeability while simultaneously being rain and drifting snow-proof, the carrier film 100 can be designed with fine perforations (not shown in detail here) that allow water vapor to pass through but are impermeable to water droplets. These perforations can be produced, for example, when connecting the carrier film 100 to the nonwoven webs 101, 102 using needle rollers or the like.

The production of such a carrier web 10 is described, for example, in DE 42 38 541 A1.

The edge strips 12 applied to the side edges 10b of the carrier web 1, here to the nonwoven web 101 of the same, are made of a plastically deformable plastic film in strip form based on polyolefins, such as polypropylene, HD polyethylene or LD polyethylene or based on PVC and are, for example, applied using a suitable,

e.g. thermally activated adhesive. The edge strips 12 are for example made with a thickness of 60 μηι, which gives them a high rigidity. Their plastic deformability is achieved by

that the edge strips 12 are designed to be wavy along their longitudinal extension L, whereby in the area of the kinks 122 the elastic extensibility of the edge strip 12 is exceeded and therefore the kinks 122 are plastically deformed. The wavy course of the edge strips 1.2 can be designed, for example, in a meandering, rectangular, triangular or similar manner.

It is essential that the carrier sheet 1.0 is fully connected to the edge strips 12 in the area of its longitudinal edges 10b, e.g. by gluing, so that the longitudinal edges 10b of the carrier sheet 10 follow the wave-shaped, bent course of the edge strips 12 in the connection area of the same. This makes it possible to adapt the longitudinal edges 10b of the carrier sheet 10 to the course of the top of roof covering panels, such as roof tiles, by plastically deforming them when the strip-shaped material sheet 1 is used as a ridge or hip cover. The middle area 10a of the carrier sheet 10, on the other hand, remains in a flat alignment and is not influenced by the wave-shaped course of the edge strips 12 and the longitudinal edges 10b.

The reinforcement strip 11 applied in the middle area 10a of the carrier web 10 is, like the edge strips 12, made of a plastic film based on polyolefins, such as polypropylene, HD polyethylene or LD polyethylene or based on PVC, preferably soft PVC, and is attached to the middle area 10a of the carrier web 10 on the same side as the edge strips 12, i.e. in the present example on the nonwoven web 101 of the carrier web 10, for example by means of a suitable adhesive. The middle area 10a of the carrier web 10 is mechanically reinforced by means of the reinforcement strip 11 applied in this way and when the strip-shaped material web 1 is used as a ridge or hip cover, it is placed on the respective ridge or hip beam with the middle area 10a and fixed to the beam, for example by means of nails. The reinforcement strip 11 prevents the

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Carrier sheet 10 in its state attached to the ridge or hip beam and thus serves as a nailing aid. For this purpose, holes 11a can be formed at regular intervals in the reinforcement strip 11, through which a nail can be passed to attach the strip-shaped material sheet 1 to the ridge or hip beam. Of course, it is also possible to make the reinforcement strip 11 unperforated and to drive the fastening elements, such as nails, directly through the reinforcement strip 11 and the carrier sheet 10 into the ridge or hip beam.

The attachment and conformability of the longitudinal edges 10b of the carrier web 10 to the top of roof covering panels, such as roof tiles, is increased by the self-adhesive strips 13 applied to the underside, i.e. to the nonwoven web 102 of the carrier web 10. These are preferably made of a strip approximately 10 to 30 mm wide based on a bitumen modified with suitable polyolefins and enable the carrier web 10 to be glued to the top of the roof covering panels when the strip-shaped material web is used for a ridge or hip cover.

The production of the strip-shaped material web 1 shown in Figures 1 to 3 is shown schematically in Figures 4a and 4b using two alternative embodiments.

In the embodiment according to Figure 4a, the already prefabricated carrier web 10, formed as shown in Figure 3, is fed from a supply roll 105 to a pair of rollers with rollers 2, 3, between which a roller gap 23 is formed. From a further supply roll 120, the undeformed plastic films 12a forming the edge strips 12 are also fed to the pair of rollers 2, 3, the feeding being carried out in such a way that the plastic films 12a and the longitudinal edges 10b of the carrier web 10 are placed on top of one another. The plastic films 12a and the carrier web 10 placed on top of one another in this way are subsequently

formed roller gap 23, where they are bonded together under the influence of the temperature and pressure prevailing there. For this purpose, the plastic films 12a can be provided with a suitable adhesive before being fed to the roller pair 2, 3, which is shown schematically by the arrows K in Figure 4.

The rollers 2, 3 forming the roller gap 23 are shown in Figures 5 and 6 in more detail.

The rollers 2, 3 are designed with a width corresponding to the width of the carrier web 10. Both rollers 2, 3 have a central region 20, 30, between which a roller gap 23b is formed, through which the central region 10a of the carrier web 10 is pulled as shown in Figure 4 without being compressed by the rollers 2, 3. The end regions 21a, 21b and 31a, 31b of the rollers 2, 3 are thickened compared to the central region 20, 30 thereof and each open up a roller gap 23a which has a smaller clear width L1 than the clear width L2 of the roller gap 23b between the central regions 20, 30. The longitudinal edges 1.0b of the carrier web 10 are guided through this roller gap 23a together with the supplied plastic films 12a, so that the longitudinal edges 10b of the carrier web 10 and the plastic films 12a are exposed to high pressure and corresponding temperatures when they pass through the roller gap 23a together, whereby the plastic films 12a are connected to the side strips 10b of the carrier web 10, e.g.

are glued together when an adhesive is used or stick together on their own due to the high temperatures and pressures in the roller gap.

From the illustration in Figure 5 it can also be seen that the thickened areas 21a, 21b and 31a, 31b of the rollers 2, 3 are provided with surface profiles in the form of elevations and

Recesses 22, 32 are formed. These surface profiles, which are only shown schematically in Figure 5, are shown in more detail in Figure 6. In the embodiment shown, the roller 2 has surface profiles in the form of recesses 22, into which the 5 surface profiles of the roller 3 in the form of elevations 32 engage in the manner of intermeshing gears, so that the plastic films 12a are not only connected to the longitudinal edges 10b of the carrier web 10 when passing through the roller gaps 23a, but at the same time also experience the wave-shaped bent course shown in Figure 1 in the longitudinal extension L and thus the plastically deformed edge strips 12 are formed, in which the bent portions 122 are each plastically deformed. It is essential that the plastic films 12a are not only connected to the longitudinal edges 10b of the carrier web 10 when passing through the roller gaps 23a between the rollers 2 and 3 due to the surface profiling 22, 23, but that at the same time the edge strips 12 with the wave-shaped plastic deformations shown in Figure 1 are formed from the plastic films 12a and the kinks 122 are formed. In contrast to this, the middle area 10a of the carrier web does not experience any deformation due to the larger clear width L2 of the roller gap 23b compared to L1. There are also no surface profilings in the area 20, 30 of the rollers 2, 3.

As a result, a connection is obtained between the edge strips 12 and the longitudinal edges 10b of the carrier sheet 10, which is full-surface, so that the carrier sheet 10 follows the wave-shaped bent course of the edge strips 12 in the area of the longitudinal edges 10b and the carrier sheet 10 provided with the edge strips 12 can be adapted to the surface design of roof covering panels by further plastic deformation of the edge strips 12 when resting on a ridge or hip beam.

In order to facilitate the connection of the edge strips 1 2 with the carrier web and simultaneous plastic deformation of the edge strips 12,

the roller 2, with which the plastic films 12a forming the edge strips 12 and the carrier web 10 first come into contact before passing through the roller gap 23 according to Figure 4, can be heated and for this purpose has connections 24 for a heating medium. It is thus possible to heat the roller 2 to a temperature required for the connection and plastic deformation of the plastic films 12a with the longitudinal edges 10b of the carrier web 10. For this purpose, the plastic films 12a and the carrier web 10 are guided around the rollers 2 and 3 so that they experience a longer dwell time on the first and heated roller 2, as seen in the direction of passage through the roller gap, before passing through the roller gap 23 and, in addition, the plastic films 12a are fed to the rollers 2, 3 in such a way that they lie directly on the surface of the first and heated roller 2 before passing through the roller gap 23, whereby the heating of the same is increased again.

The heating of the edge strips 12 and/or carrier web 10 can be such that an adhesive applied according to arrows K in Figure 4, for example a hot melt adhesive, is thermally activated before the connection, or the heating is so great that the edge strips bond themselves to the carrier web when passing through the roller gap.

Furthermore, it can be provided to further increase the heating of the plastic films 12a and/or carrier web 10 forming the edge strips 12 by means of heat rays W from a heating radiator (not shown in detail) before passing through the roller gap.

In the alternative embodiment according to Figure 4b, two consecutive roller pairs are shown, which are formed by rollers 2a, 3a and 2b, 3b respectively. A first roller gap 23a is formed between the rollers 2a, 3a forming the first roller pair, and a second roller gap 23b is formed between the rollers 2b, 3b forming the second roller pair. Both the

The roller pairs forming roller gaps 23a and 23b have a surface profiling with interlocking elevations and depressions, as has already been described above with reference to Figures 5 and 6.
5

To connect the edge strips 12 to the carrier web 10, in the embodiment according to Figure 4b, the still undeformed plastic films 12a that form the edge strips 12 are first fed from a supply roll 120 to the first pair of rollers formed by the rollers 2a and 3a and guided through the roller gap 23a. In this case, the plastic films 12a are plastically deformed in a wave-like manner to form the edge strip 12 in accordance with the surface profiles of the rollers 2a, 3a due to the increased temperature and pressure prevailing in the roller gap 23a.

The plastic deformation of the edge strips 12 in the roller gap 23a is supported by the fact that the first roller 2a, seen in the feed direction of the edge strips, can be heated and is heated to a temperature required for the plastic deformation of the edge strips 12. In addition, the plastic films 12a forming the edge strips are guided around the roller 2a so that they experience a longer residence time on the heated roller 2a before their plastic deformation in the roller gap 23a to form the edge strips 12 and can be heated sufficiently.

The edge strips 12, which are plastically deformed in a wave-like manner along their length, then enter the second roller gap 23b formed between the rollers 2b, 3b, into which the carrier web 10 is simultaneously fed from a supply roll 105. As already described in Figure 4a, the feeding takes place in such a way that the edge strips 12 and the longitudinal edges 10b of the carrier web 10 lie on top of one another.

As a result of the rollers 2b, 3b being provided with the same surface profile as the rollers 2a, 3a, the wave-shaped deformation of the edge strips 12 produced in the roller gap 23a is prevented from being lost when the edge strips 12 and the carrier web 10 are passed through together, but on the other hand a full-surface connection of the edge strips 12 to the carrier web 10 in the area of its longitudinal edges 10b is also achieved in accordance with the wave-shaped course of the edge strips 12. For this purpose, it can again be provided, for example, to apply an adhesive K and/or heat rays W to the carrier web 10 before the roller gap 23b.

The two-stage operation effected in this way, with plastic deformation of the edge strips 12 in a first, heated roller gap, and only then the already deformed edge strips 12 being connected to the carrier web 10, reduces the thermal load on the latter. If necessary, however, one or both rollers 2b, 3b can be heated to a temperature required for connecting the carrier web 10 to the edge strips 12. This temperature is usually below the temperature required for the plastic deformation of the edge strips 12 in the roller gap 23a.

After the plastic films 12a have been connected to the longitudinal edges 10b of the carrier web 10 in one of the previously described ways according to Figure 4a or 4b with plastic deformation and formation of the edge strips 12, the self-adhesive strips 13 on the side facing away from the edge strips 12 and the reinforcing strip 11 on the same side as the edge strips 12 are subsequently fed from supply rolls 13a or 11a to the carrier web 10 and connected to it between rollers 4a, 4b, so that the strip-shaped material web 1 shown in Figure 1 is subsequently obtained and can be wound up on a supply roll 5 for further processing and use.

Both when connecting the edge strips 12 to the side strips 10b of the supporting web 10 and when connecting the reinforcement strip 11 to the middle area 10a of the supporting web 10, depending on the material properties, it can be provided to connect the edge strips 12 and/or the reinforcing strip 11 to the carrier web 10 only by applying pressure and heat or to use suitable adhesives, in particular so-called hot melt adhesives, for the connection to the carrier web 10. These can be applied as a coating to the edge strips 12 or the plastic films 12a forming them or the reinforcement strips 11 during the production of the same or the adhesives are applied to them immediately before the edge strips 12 or the plastic films 12a forming them are joined to the carrier web 10 or the reinforcement strips 11 are joined to the carrier web 10.

Claims (21)

Protection claims: G 98 025i 1. Strip-shaped material web for a ridge or hip covering with a rain and drifting snow-proof carrier web, which has a width corresponding to the width of the material web and in which a plastically deformable edge strip is applied at least in the area of the outer longitudinal edges of the carrier web, such that the carrier web provided with the edge strips can be adapted to roof covering panels, characterized in that the carrier web (10) is formed from a composite material with a multi-layer structure that is elastically stretchable in at least one direction, in which one layer is formed from an elastic and flexible carrier film (100) and at least on one side of the carrier film (100) a nonwoven web (101 or 102) is provided as a further layer, which is connected to the carrier film (100) to form hollow spaces (104), wherein the nonwoven web is connected to the carrier film (100) in point or line-shaped areas by means of thermobonding or ultrasonic welding and the edge strip (12) is made of a plastically deformable plastic film and is wave-shaped in the longitudinal extension (L) of the material web and is fully connected to the carrier web (10). 2. Strip-shaped material web according to claim 1, characterized in that the carrier web (10) is designed in three layers, with a nonwoven web (101, 102) as outer layers being connected to the carrier film (100) as inner layer on each side of the carrier film (100) to form hollow spaces (14). 3. Strip-shaped material web according to claim 1 or 2, characterized in that the nonwoven webs (101, 102) of the carrier web (10) have a wave-shaped course, the wave crests and ₂₆ Vi,.. fr.-.&Mgr;=.·: -valleys are formed to run perpendicularly with respect to the carrier film (100) and are connected to the carrier film (100) in some areas. 4. Strip-shaped material web according to claim 3, characterized in that the undulating nonwoven webs are connected to the carrier web (10) in the region of their wave troughs. 5. Strip-shaped material web according to one of claims 1 to 4, characterized in that the carrier film (100) of the carrier web (10) is formed from a rubber-elastic thermoplastic elastomer. 6. Strip-shaped material web according to one of claims 1 to 5, characterized in that the thickness of the carrier film (100) of the carrier web (10) is 0.01 to 0.08 mm. 7. Strip-shaped material web according to one of claims 1 to 6, characterized in that the carrier film (100) is formed with perforations of such a size that they allow water vapor to pass through and repel the passage of water droplets. 8. Strip-shaped material web according to one of claims 1 to 7, characterized in that the nonwoven webs (101, 102) of the carrier material (10) are made on the basis of polyolefins, such as polypropylene or a polyester. 9. Strip-shaped material web according to one of claims 1 to 8, characterized in that a reinforcing strip (11) is applied in the central region of the carrier web (10). 10. Strip-shaped material web according to one of claims 1 to 9, characterized in that the edge strips (12) and/or the reinforcing strip (11) are made of a plastic film based on • . · ϕ Polyolefins, such as polypropylene, HD polyethylene or LD polyethylene or a soft PVC in a thickness of 40 to 100 μm. 11. Strip-shaped material web according to one of claims 9 or 10, characterized in that the reinforcing strip (11) is perforated is trained. 12. Strip-shaped material web according to one of claims 1 to 11, characterized in that the edge strips (12) and/or the Reinforcing strips (11) are glued to the carrier web (10). 13. Strip-shaped material web according to one of claims 1 to 12, characterized in that in the region of the longitudinal edges of the carrier web (10) on the side of the carrier web (10) facing away from the edge strips (12) Self-adhesive strips (13) based on bitumen and/or a Butyl rubber is applied to the carrier web (10). 14. Strip-shaped material web according to claim 13, characterized in that the adhesive strips (13) are secured by means of a removable cover strip made of covered with a plastic film or siliconized paper. 15. Strip-shaped material web according to one of claims 1 to 14, characterized in that the edge strips (12) and the reinforcing strip (11) are applied to the same side of the carrier web (10). 16. Strip-shaped material web according to one of claims 1 to 15, characterized in that it is made UV-resistant at least in some regions. 1 7. Device for producing a strip-shaped material web for a ridge or hip cover with a rain and drifting snow-proof carrier web and along the longitudinal edges of the carrier web applied plastically deformable edge strip according to one of claims 1 to 16 , characterized in that a first pair of rollers is provided with two rollers (2a, 3a) forming a first roller gap (23a), wherein at least one of the rollers (2a, 3a) has a surface profile in the form of elevations and/or depressions and the plastic film (12a) forming the edge strips can be fed to the first roller gap (23a) in such a way that it can be plastically deformed in a wave-like manner to form the edge strips when it is passed through the roller gap, and a second pair of rollers is provided downstream of the first pair of rollers with two rollers (2b, 3b) forming a second roller gap (23b), through which the wave-shaped edge strips (12) can be passed together with the carrier web, wherein the rollers (2b, 3b) have a width corresponding to the width of the carrier web (10) and the end regions of the rollers (2b, 3b), between which the longitudinal edges of the carrier web (10) are guided together with the edge strips (12) through the second roller gap (23b), are thickened and at least the thickened end regions of a roller are designed with a surface profiling corresponding to the surface profiling of the at least one profiled roller of the first roller pair, so that the edge strips (12) and the longitudinal edges (10b) of the carrier web can be connected to one another over their entire surface when passing through the second roller gap (23b) while maintaining the deformation of the edge strips. 18. Device for producing a strip-shaped material web for a ridge or hip cover with a rain- and drifting snow-proof carrier web and plastically deformable edge strips applied along the longitudinal edges of the carrier web according to one of claims 1 to 16, characterized in that a pair of rollers, between which a roller gap is formed and feed devices for the joint feed of the carrier web (10) and the plastic film (12a) forming the edge strips to the roller gap are provided in such a way that the carrier web (10) with the edge strips (12) when passing through the 9Q Roller gap can be connected under the influence of pressure and heat and the rollers have a width corresponding to the width of the carrier web and the end regions of the rollers, between which the longitudinal edges of the carrier web (10) are guided through the roller gap together with the edge strips (12), are thickened and at least the thickened end regions of a roller are designed with a surface profile in the form of elevations and/or depressions, so that the edge strips (12) and at least the longitudinal edges of the carrier web (10) are deformed in a wave-like manner when passing through the roller gap, wherein the edge strips (12) undergo plastic deformation and are connected to the carrier web over their entire surface. 19. Device according to one of claims 17 or 18, characterized in that both rollers forming a roller gap are provided with a 5 Surface profiling in the form of elevations and/or depressions are designed and the rollers with their surface profiles are arranged so as to engage one another. 20. Device according to one of claims 17 to 19, characterized in that at least one of the rollers forming the roller gap, by means of which the edge strips (12) are plastically deformable, is heatable. 21. Device according to one of claims 17 to 20, characterized in that downstream of the rollers forming the roller gap, feed devices are provided for the supply and application of reinforcing strips (11) to the central region of the carrier web (10) and/or adhesive strips (13) to the longitudinal edges of the carrier web (10) on the side facing away from the edge strips (13).