Roll of film web

Abstract

The invention relates to a roll (1) with a film web (5) wound in superimposed windings (3) for a wall connection of a window, a door or another component, wherein the film web (5) comprises a layered composite (7) having a nonwoven layer (13), a membrane (15) and a self-adhesive layer (17), wherein a cover film (10) is applied at least partially to the self-adhesive layer (17), wherein the cover film (10) is folded around the layered composite (7) in a region along at least one, preferably both, longitudinal edges (9) of the film web (5) such that a folded section (11) of the cover film (10) of a winding (3) partially covers the layered composite (7) of this winding (3) and the folded section (11) is received inside the roll (1).

Description

[0001] The present invention relates to a roll of coated film web, in particular a window film web. Such films are applied to the frame of a window or door to create a seal between the door or window and the masonry. Due to their variable properties, they are suitable, for example, both outdoors as weather protection and indoors, preferably as an airtight layer to separate the indoor and outdoor climates.

[0002] Typically, such films are made of a membrane laminated with a nonwoven fabric, which can be vapor-permeable or vapor-tight. The nonwoven fabric gives the film a solid, stable base structure and good plastering and adhesive properties. Self-adhesive layers facilitate application to the frame and / or masonry. The film strips are supplied lengthwise in rolls, with self-adhesive layers usually provided with corresponding cover films that are removed before final use. Handling the roll or film strip—i.e., unrolling, affixing, and cutting to length—is crucial for the film's intended use.

[0003] With conventional films available in rolls, it can happen that adhesive leaks or oozes out of the self-adhesive layers at the ends of the rolls for a variety of reasons, such as the type of manufacturing process, improper rolling up or uneven distribution of adhesive. This oozing can occur immediately after rolling up during production, but also later, i.e. when the roll is ready for sale. The resulting adhesive residue on the ends of the rolls can impair the intended use of the films. The effectiveness of the corresponding adhesive bond between window film and window after installation can also be impaired by such adhesive residue before the film is used.

[0004] EP 3 425 132 A1 and WO 2008 / 098700 A1 relate to a sealing tape.

[0005] It is therefore the object of the present invention to provide an improved roll with a film web wound in superimposed windings, which at least partially overcomes the above-mentioned disadvantages and in particular offers better handling and a reliable sealing function.

[0006] This object is achieved by the subject matter of claim 1. Advantageous embodiments are described in the dependent claims.

[0007] According to the invention, a roll is provided with a film web wound in superimposed developments for a wall connection of a window, a door or other component, wherein the film web comprises a layer composite having a nonwoven layer, a membrane and a self-adhesive layer, wherein a cover film is at least partially applied to the self-adhesive layer, wherein the cover film is folded around the layer composite in a region along at least one, preferably both, longitudinal edges of the film web such that a folded-over section of the cover film of one winding partially covers the layer composite of this winding and the folded-over section is accommodated inside the roll. Depending on the requirements of the film web, the layer composite can also have more than one nonwoven layer, more than one membrane and more than one self-adhesive layer, wherein the respective number does not need to be identical.

[0008] Such an arrangement effectively prevents adhesive from bleeding from the self-adhesive layer on the end faces of the roll. This, in turn, results in better handling when unrolling and applying the film web to a component. Furthermore, it results in an even distribution of the adhesive and thus a better bond effectiveness.

[0009] The cover film preferably surrounds the laminated composite along the long edge of the film web. This more effectively prevents adhesive from seeping out of the end face of the roll, especially when the cover film seals the laminated composite. The cover film preferably adheres to the horizontal and vertical edges of the laminated composite, preventing any gaps from forming between the laminated composite and the cover film.

[0010] Particularly advantageously, the folded portion of the cover film has a width of 10 mm to 5 cm, preferably 5 mm to 4 cm, and even more preferably 2 mm to 3 cm. This results in a sufficiently wide fold of the cover film, so that even the creeping out of excess adhesive along the inside of the cover film can be effectively prevented. The width of the folded portion can be selected, for example, according to the properties of the adhesive used in the self-adhesive layer.

[0011] In an advantageous embodiment, the cover film is designed in several parts such that at least part of a second cover film overlaps at least part of a first cover film. The multi-part nature of the cover film can improve handling because it provides more options as to where a user can remove the cover film from the film web. In particular, this makes it possible to determine the location of the overlap for each film web depending on the application. The overlap is preferably formed in the longitudinal direction of the film web and has a width of 0.5 mm to 10 cm, preferably 2 mm to 8 cm, even more preferably 3 mm to 6 cm. Pulling off the cover film is made considerably easier by the overhang or overlap because a user can easily lift the overlapping part of the first cover film from the second cover film and grasp it.

[0012] The membrane is preferably made of a plastic material such as polypropylene, EPDM, polyester, polystyrene, polyethylene, polyamide, or another polymer or copolymer. Other materials with similar properties, such as watertightness and vapor diffusion, are also possible.

[0013] The membrane has a thickness of preferably 5 µm to 500 µm, more preferably 10 µm to 100 µm and particularly preferably 15 µm to 50 µm.

[0014] In preferred embodiments, the nonwoven layer comprises a layer of nonwoven fabric, woven fabric, technical knit, glass fibers, reinforced paper, or a similar nonwoven material. The nonwoven layer serves in particular to reinforce the film web, for example, to improve the tear resistance and robustness of the entire film web. Furthermore, the nonwoven layer improves the ability to be plastered over and / or survived. It is also preferably possible to pretreat or preprocess the materials of the nonwoven layer mentioned here to improve certain properties.

[0015] Advantageously, the nonwoven layer has a thickness of 10 µm to 1500 µm, preferably 20 µm to 1000 µm, and particularly preferably 30 µm to 500 µm. This property provides the film web with sufficient robustness while simultaneously improving handling.

[0016] It is further preferred that the folded section be arranged within the roll between the layer composite of a first winding and the layer composite of a second, adjacent winding. Along one end face of the roll, the folded sections thus lie one above the other in the radial direction of the roll, with the upper side of the folded section of an outer winding abutting the underside of the cover film in the edge region of the next inner winding, or vice versa.

[0017] Further advantages and effects of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. Fig. 1 shows a perspective schematic representation of a first embodiment of the roll according to the invention with a film web wound in superimposed windings; Fig. 2 shows a sectional view of the roll from Fig. 1 along a plane through the roll axis; Fig. 3 shows a cross-sectional view of an unrolled film web according to a further embodiment; Fig. 4 shows a cross-sectional view of an unrolled film web according to a further preferred embodiment; and Fig. 5 shows a perspective schematic representation of the film web from Fig. 4 .

[0018] Fig. 1 shows an isometric perspective view of a roll 1 with a film web 5 wound in several windings 3 according to a first embodiment. The outermost of the windings 3 is shown as already unwound on one level, with the end of the film web 5 visible. In the embodiment shown here, the roll 1 is shown purely schematically so that the technical features of the invention can be clearly explained. It is understood that the actual dimensions of a roll may vary, as will be explained in more detail below.

[0019] The film web 5 has a layer composite 7, which with reference in particular to Fig. 2 described in detail. A cover film 10 is applied to the (in Fig. 1 not visible) underside of the unwound section of the film web 5 is applied to the layered composite 7 and guided or folded around it along a longitudinal edge 9, so that a folded-over section 11 is formed on the upper side 13 of the film web 5. By winding the film web 5 into the roll 1, the folded-over section 11 is arranged within the roll 1 between the layered composite 7 of a first winding 3 and the layered composite 7 of a second adjacent winding 3. As a result, on this end side of the roll 1, the layered composite 7 is not visible from the side, but only the cover film 10 which surrounds the edge of the layered composite 7. In this way, any adhesive residues from the layered composite 7 are prevented from escaping on the end side of the roll 1.

[0020] Fig. 2 shows a schematic sectional view of roll 1 from Fig. 1 along a plane passing through the roll axis 2. Three superimposed windings 3 of the film web 5 can be seen, forming the roll 1. In reality, there are usually significantly more windings. A film web 5, forming a winding 3, comprises the layered composite 7 and the cover film 10.

[0021] In the embodiment shown here, the layer composite 7 has a nonwoven layer 13 which is Fig. 1 shown in dash-dotted form, a membrane 15, which in Fig. 1 shown in solid form, and a self-adhesive layer 17, which is Fig. 1 The cover film 10 completely covers the self-adhesive layer 17 on the underside of the laminate 7 and is Fig. 2 The cover film 10 is guided around the end face shown on the left around the layered composite 7, so that the folded section 11 of the cover film 10 is arranged between two superimposed windings 3. Suitable materials for the self-adhesive layer 17 are, for example, acrylates or EVA or other pressure-sensitive adhesives that are usually processed into transfer adhesive tapes. Since the cover film 10 is formed from a robust and dense material such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) or another suitable plastic material, leakage of adhesive or other liquid materials from the layered composite 7 is effectively prevented.

[0022] It is understood that the layered composite 7 can also comprise more than just one, i.e., several membranes 15, nonwoven layers 13, or self-adhesive layers 17, depending on the requirements for the properties of the film web 5, and / or that the sequence of the layers can vary. However, a self-adhesive layer 17 must always be on the outside. To protect against oozing out of each layered composite 7, folding the cover film 10 over or around the end face is effective. Because the folded section 11 is virtually clamped between the superimposed windings 3 of the roll 1, slipping out of the folded section 11 is also prevented.

[0023] Fig. 3 shows a cross-sectional view of a film web unrolled from a roll according to another embodiment of the invention. In contrast to the embodiment in Fig. 2 The design of the Fig. 3 on both long sides 9 of the film web 5 a folded section 11 of the cover film 10. It is in Fig. 3 It can be seen that the cover film 10 is folded over at a folded edge 19, so that the folded section 11 points diagonally upwards. This can be the case when the film web 5 has not yet been wound up to form the roll 1 with the windings lying on top of one another, or when it has already been unwound from the roll 1. In both scenarios, the cover film 10, including the folded section 11, effectively surrounds the longitudinal edge 9 of the layered composite 7, so that adhesive squeezed out of or flowing from the layered composite 7 cannot get outside the cover film 10. Additionally (not shown), the cover film 10 can be made up of several parts, with the cut edges touching or almost touching. This multi-part design can also be achieved by cutting the originally one-piece cover film 10. A multi-part design improves handling during assembly.

[0024] In Fig. 4 is similar to the representation of the Fig. 3 a film web in cross section, which is unrolled from a roll according to another preferred embodiment. In contrast to the embodiment of the Fig. 3 the cover film 10 is made up of several parts.

[0025] It comprises first parts which, as in the embodiments described above, are arranged essentially on the left and right on the underside of the layered composite 7. Each first part of the cover film 10 surrounds a longitudinal edge 9 of the film web 5 with a folded-over section 11. A second cover film 14 is applied to the layered composite 7 in such a way that it overlaps a part of the first cover film 10. Bridging an intermediate space 18, the second cover film 14 covers the layered composite 7, here the self-adhesive layer 17, with an overlapping area 16 forming on each side. The advantage of dividing the cover film is improved handling of the film web 5 because the overlapping areas 16 provide a user with points of engagement for removing the film web 5 which do not adhere and which are comparatively advantageously exposed.The user can, for example, lift the second cover film 14 from both long sides at the corresponding overlap 16 and then peel it off. The inner edges of the first cover film 10 on the underside of the film web 5 are then exposed and can also be lifted up. In addition, the division offers the option of first peeling off the first cover film 10 along a first long side, positioning and adhering the film web 5 on one side, for example, along a window frame, and only then peeling off, positioning, and adhering the other part of the first cover film 10 along the second long side. Deviating from what is shown, the cover film can also overlap with the cover film 10 on only one side, or the cover film 10 can overlap above the cover film 14 on one side and below the other side.

[0026] Fig. 5 shows a perspective schematic representation of the film web from Fig. 4 , wherein the folded sections 11 of the cover film 10 are schematically less oblique than in Fig. 4 are shown. Due to the fact that the film web 5 as a product has a very small thickness compared to its length and width, for example a thickness of approximately 0.5 mm and a width of approximately 70 mm, the actual angle of folding is almost 180°.

[0027] The folded sections of the cover film 10 can thus be present on one end face of the roll or, preferably, on both end faces. Likewise, the loosely folded section of the cover film 10 can be folded toward a further inner winding of the roll or toward a further outer winding of the roll.

[0028] It is also conceivable to releasably adhere the folded portion of the cover film 10 to the side of the laminate opposite the self-adhesive layer if this offers advantages in handling. However, the contact pressure in the roll is generally sufficient to prevent the folded portion of the cover film 10 from slipping out of the roll.

Claims

1. A roll (1) with a film web (5) rolled up into windings (3) which lie on top of each other for a wall connection of a window, a door or another component, wherein the film web (5) comprises a layered composite (7) which has a fleece layer (13), a membrane (15) and a self-adhesive layer (17), wherein a covering film (10) is applied to at least a portion of the self-adhesive layer (17), wherein, in a region along at least one, preferably both longitudinal edges (9) of the film web (5), the covering film (10) is folded around the layered composite (7) in a manner such that a folded-over section (11) of the covering film (10) of a winding (3) partially covers over the layered composite (7) of this winding (3) and the folded-over section (11) is accommodated in the interior of the roll (1).

2. The roll (1) as claimed in claim 1, characterized in that the covering film (10) surrounds the layered composite (7) in the region of the longitudinal edge (9) of the film web (5), preferably in a leakproof manner.

3. The roll (1) as claimed in one of the preceding claims, characterized in that the width of the folded-over section (11) of the covering film (10) is from 10 mm to 5 cm, preferably from 5 mm to 4 cm and yet more preferably from 2 mm to 3 cm.

4. The roll (1) as claimed in one of the preceding claims, characterized in that the covering film (10) is constructed in multiple parts such that at least a portion of a second covering film (14) overlaps at least a portion of a first covering film (10).

5. The roll (1) as claimed in claim 4, characterized in that the overlap (16) is in the longitudinal direction of the film web (5) and the width is 0.5 mm to 10 cm, preferably 2 mm to 8 cm, yet more preferably 3 mm to 6 cm.

6. The roll (1) as claimed in one of the preceding claims, characterized in that the membrane (15) is formed from a plastic material such as polypropylene, EPDM, polyester, polystyrene, polyethylene, polyamide or another polymer or copolymer.

7. The roll (1) as claimed in one of the preceding claims, characterized in that the thickness of the membrane (15) is from 5 µm to 500 µm, preferably 10 µm to 100 µm and particularly preferably from 15 µm to 50 µm.

8. The roll (1) as claimed in one of the preceding claims, characterized in that the fleece layer (13) has a layer of nonwoven fabric, woven fabric, technical knit, glass fibres, reinforced paper or another fleece-like material.

9. The roll (1) as claimed in one of the preceding claims, characterized in that the thickness of the fleece layer (13) is from 10 µm to 1500 µm, preferably 20 µm to 1000 µm and particularly preferably from 30 µm to 500 µm.

10. The roll (1) as claimed in one of the preceding claims, characterized in that the folded-over section (11) is disposed inside the roll (1) between the layered composite (7) of a first winding (3) and the layered composite (7) of a second, adjacent winding (3).

11. The roll (1) as claimed in claim 10, characterized in that the folded-over section (11) is disposed inside the roll (1) between the layered composite (7) of a first winding (3) and the covering film (10) of the second, adjacent winding (3).

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