EP3728505A2

EP3728505A2 - Liner for covering an adhesive tape, covered adhesive tape, coil with said covered adhesive tape, and method for the production and use thereof

Info

Publication number: EP3728505A2
Application number: EP18833641.6A
Authority: EP
Inventors: Jochen Fiencke; Martin Geelink; Marcus Müller
Original assignee: Tesa SE
Current assignee: Tesa SE
Priority date: 2017-12-22
Filing date: 2018-12-19
Publication date: 2020-10-28
Also published as: WO2019122040A2; WO2019122040A3; DE102017223768A1

Abstract

The present invention relates to a liner which is suitable for covering an adhesive tape. Said liner can be split. The invention further relates to a double-sided adhesive tape covered with said liner and to a coil having such an adhesive tape wound thereon. The liner according to the invention is intended to project beyond at least one of the two edges of the actual adhesive tape. The invention reduces the tendency to fold during winding and unwinding of a thick, preferably foamed adhesive tape. In addition, it makes such a coil more stable. The invention also relates to a method for producing said type of adhesive tape coil; and to the use thereof for producing composite articles in particular for self-adhesive finishing of profiles.

Description

description

Liner for covering an adhesive tape, covered tape, spool with this covered tape, and methods of making and using the same

The present invention relates to a liner which is suitable for covering an adhesive tape. It further relates to a double-sided tape with a cover and an adhesive tape spool comprising a roll core, and the aforementioned covered tape. The invention further relates to a method for producing such an adhesive tape reel and, finally, to the use of this adhesive tape reel for the production of composite articles such as, for example, adhesive tape profiles.

By "covered tape" is meant in the context of this application, an adhesive tape together with its adhering thereto liner. The "actual tape", however, means the tape after removal of the liner. The word borrowed from the English word "liner" is synonymous with "release agent". In general, this is a paper with non-stick coating or a low or no adhesive film.

To the state of the art

Double-sided adhesive tapes and adhesive tape reels are known and often used to bond different materials together. Sometimes an article of low or even non-polar material must be adhered to a higher polarity article. Sometimes an adhesive bond to a material of unfavorable, namely low surface tension must be produced. Adhesive tape manufacturers react to such special requirements with special adhesives; in particular, another adhesive may be used on one side of an adhesive tape than on the other.

For the gluing of rubber profiles, it has been proven, on the side facing the rubber profile side of the double-sided adhesive tape, a heat-sealable adhesive as is known from EP 0 384 598 (3M) and WO 95/13184 (Meteor Gummiwerke). They flow very well on the substrates in a certain temperature range and then give a firm bond on cooling.

Because the combination of such a double-sided adhesive tape with a rubber profile for technical and economic reasons is almost equally endless, as the rubber profile itself is extruded almost endlessly, the delivery of the tape from the tape manufacturer to the rubber profile manufacturer is expediently in such a kind of container, the one extremely large length of tape is able to absorb. Notwithstanding the otherwise most common type of container, the so-called pan-cake, which takes place by winding the tape on a core without axial feed, so that the resulting coil has the same width as the tape, there are two types of packaging available for which a number of adhesive tape Widths can be accommodated next to each other. In addition to the less popular container called multi-pan-cake (or even step-wise wound-roll called) this is especially for decades, the container type "coil", sometimes called "cheese" (English: "level wound spool" or just "spool") known. When coils are wound with an axial feed and that in multi-pan-cake each with a feed step by at least one tape width after reaching the desired maximum diameter, whereas the more common (cross) coils with a uniform feed over the coil width whose orientation at the intended coil edges each reverses the transition to the next layer of turns. For the terms of winding technology, reference is made to the electronic textbook of the company "Double R Controls LTD, England" by the author Neal Rothwell, which has been published on the Internet since 1 July 2001 and entitled "Technical Information on the Principles of Spooling".

EP 2 746 356 proposes, in this connection, an adhesive tape spool of foamed acrylate adhesive tape which is heat-sealable on one side. This document claims that prior art tape spools were associated with stability issues, for example, during transport. To solve the problem, the inventors of EP 2 746 356 A1 propose the use of different release agents, with which the two adhesive surfaces of the double-sided adhesive tape are covered before winding, one of which on one side of the adhesive tape and one on the other side. It should be one the two release agent - and that on the heat sealable side - extend laterally beyond the edge region of the adhesive tape out.

Problem and task

However, the adhesive tape reels thus produced behave unfavorably both during winding and when unwinding. It always comes back to drape.

Considerations to wind the adhesive tape of EP 2 746 356 A1 with higher web tension in order to completely suppress the wrinkling, at least during rolling, did not lead to the goal but to further problems: there is an increased lateral leakage of the adhesive due to the then higher inter-layer pressure , with the result that the width and thickness of the adhesive tape can vary uncontrollably. One could counter this by increasing the measures against the blocking risk of the coil, so that one adjusts a larger underlap of the tape and a larger overlap of the wide liner, but the extra space between the turns of a layer through the enlarged underlap and the additional liner mass, due to the widening of the liner, which in turn would be required to increase its overlap, reduces the amount of adhesive tape that can be accommodated in the container in view of the limitations in the available bobbin volume and in the approved bobbin mass.

The object of the present invention is therefore to provide an adhesive tape which can be unwound and unwound again with at least a slight tendency to fold and corresponding adhesive tape reels.

Description of the invention

The invention is based on the knowledge of the inventors that the earlier problems during winding and unwinding related to the fact that the two by the thick tape between widely spaced liners with their - in relation to the tape itself - higher tensile stiffness per cross-sectional area behave like the Both flanges (= belts = flange (engl.)) of an I-beam, while the actual tape (that is, what is not a liner) behaves like the web (= web) of an I-beam. And just as the I-beams were developed especially for bending loads To withstand and thereby bend as little as possible, so opposes a thick tape with upper and lower liner fierce the compulsion to the curvature of a spool core. Just when, after months of storage, these so-called wrapped bending stresses have calmed down by creeping and relaxation processes, ie have decayed largely, then rewinding prepares the analogous difficulty, only with the opposite sign: The tape now wants to retain the curvature that he had Spooling has been imposed.

The inventors have recognized that this problem is all the more urgent, the higher the shear resistance of the adhesive tape is. But especially in the case of high-performance adhesive tapes, which are to compete with thermosetting liquid adhesives and spot welded joints, a high shear resistance of the adhesive tape must be sought.

Against this background, the present invention provides a fissile liner. In this way, it is possible to arrange the tension-resistant members of the covered tape even on only one of the two sides of the tape, even if some of the covered tape reel needs to be peeled off to serve as a drive means in an unwinding device. Because after the cleavage of the liner, that part which is not in direct contact with the pressure-sensitive adhesive side of the adhesive tape can be used as such a drive means, while the other part of the liner remains on the adhesive tape.

For keeping short of some of the following formulations, that adhesive tape side which is self-adhesive (= tacky = pressure-sensitive) is referred to as "(a)", whereas the heat-activatable one is referred to as "(b)".

The invention further comprises a double-sided adhesive tape covered thereby - and only on one side. The said liner should adhere to one of the two sides of the adhesive tape. If the double-sided adhesive tape is tack-adhesive on only one side but heat-sealable on the other side (= heat-activably adhesive), then the fissile liner according to the invention should be arranged on the pressure-sensitive adhesive side (a) of the adhesive tape. In this way, a slightly adhesive coating of the liner is dispensed with, which would otherwise be required for a secure fit on the heat-sealable (ie not sticky at room temperature) side. This not only saves effort but above all avoids from the outset that residues of the light adhesive coating of the liner unintentionally remain on the heat-sealable layer and impair it.

This liner should preferably survive over at least one, more preferably over both, end faces of the actual adhesive tape. It is sufficient if one of the two parts, in which the liner is fissile, survives. This should preferably be the part that is not in direct contact with the self-adhesive of the actual adhesive tape.

The present invention further provides an adhesive tape spool comprising a roll core and a covered double sided adhesive tape thereon.

According to the invention, the adhesive tape spool can be produced in a process comprising the following steps:

- Providing a roll core;

- Providing a double-sided adhesive tape having a first outer adhesive side (a) and a second outer side (b);

- Providing a release paper with a release layer (A) and a release layer

(B);

- bringing the adhesive tape into contact with the release paper; and

Wrapping the adhesive tape and release paper around the roll core such that the first outer tacky adhesive side (a) and the second outer side (b) are separated by the release paper, the release liner (A) of

Release paper in the wound state of the adhesive tape with the outer pressure-sensitive adhesive side (a) of the adhesive tape in contact, and the release layer (B) in the wound state of the adhesive tape is in contact with the outer side (b) of the adhesive tape.

The present invention further relates to the use of the adhesive tape spool described herein for making a composite article. Also according to the invention is the use of the adhesive tape reel for the bonding of profiles, in particular of a thermoplastic, of ethylene-propylene-diene rubber, or of another rubber-like material.

Surprisingly, it has been found that the adhesive tape reel of the present invention is not only associated with high transport and storage stabilities, but that according to the invention a squeezing / leakage of the adhesive can be avoided. Without wishing to be bound by the presumption, the inventors believe that this improvement results from a reduced winding tension with which stable adhesive tape rolls are available. In addition, the adhesive tape reel according to the invention ensures a continuous application process, even on a large industrial scale, because the increased stability of the adhesive tape reel is retained even after it has been used. In particular, this ensures that an adhesive tape reel can also be used at various intervals, and that, moreover, the use of the adhesive tape reel at the beginning of its use is accompanied by similar insertion parameters (unwinding speed and withdrawal resistance) as after consumption of, for example, half of the adhesive tape.

Detailed description of the invention

The adhesive tape reel of the present invention comprises a roll core, a release paper, and a double-sided adhesive tape.

roll core

The roll core of the adhesive tape reel according to the invention is usually made of plastic or of hard cardboard. Examples of a suitable plastic are olefinic resins such as polyethylene, polypropylene, ethylene-propylene copolymers, blends of polyethylene with polypropylene, and ethylene-vinyl acetate copolymers and polyvinyl chlorides. The shape of the roll core is not subject to any special Restrictions, but is preferably cylindrical. Corresponding cylinders preferably have a length of 1 to 200 cm and a diameter of 3 mm to 50 cm.

Double-sided adhesive tape

The double-sided adhesive tape of the adhesive tape reel according to the invention comprises a first outer pressure-sensitive adhesive side (a) and a second outer side (b), wherein the second outer side (b) of the adhesive tape is preferably heat-activated.

first outer side (a) of the adhesive tape -

A pressure-sensitive adhesive layer or a pressure-sensitively adhesive layer in this invention, as generally used, is understood to mean a layer which, especially at room temperature, is permanently tacky and tacky.

Characteristic of such a layer is that it can be applied by pressure to a substrate and adhere there, whereby the pressure to be applied and the duration of this pressure are not defined further. In some cases, depending on the precise nature of the pressure-sensitive adhesive, the temperature and humidity, and the substrate, the application of a short-term, minimum pressure that does not exceed a light touch for a brief moment to achieve the adhesion effect is sufficient in other cases may also be a longer-term exposure time of high pressure necessary.

Pressure-sensitive adhesive layers or pressure-sensitive adhesive layers have special, characteristic viscoelastic properties, which lead to permanent tackiness and adhesiveness.

Characteristic of them is that when they are mechanically deformed, it comes both to viscous flow processes as well as to build elastic restoring forces. Both processes are in a certain proportion to each other in terms of their respective proportions, depending on the exact composition, the structure and the Degree of crosslinking of the pressure-sensitive adhesive layer to be considered as well as the speed and duration of the deformation and the temperature.

The proportional viscous flow is necessary to achieve adhesion. Only the viscous portions, caused by macromolecules with relatively high mobility, allow a good wetting and a good flow onto the substrate to be bonded. A high proportion of viscous flow leads to a high pressure tack (also referred to as tack or surface tackiness) and thus often also to a high bond strength. Strongly crosslinked systems, crystalline or glassy solidified polymers are usually not or at least only slightly tacky due to the lack of flowable components.

The proportional elastic restoring forces are necessary to achieve cohesion. They are caused for example by very long-chained and strongly entangled as well as by physically or chemically crosslinked macromolecules and allow the transmission of forces acting on an adhesive bond forces. They result in an adhesive bond being able to withstand a sustained load acting on it, for example in the form of a permanent shearing load, to a sufficient extent over a relatively long period of time.

For a more detailed description and quantification of the degree of elastic and viscous portion and the ratio of the proportions to one another, the variables storage modulus (G ') and loss modulus (G ") that can be determined by means of dynamic mechanical analysis (DMA) can be used. G 'is a measure of the elastic content, G "is a measure of the viscous portion of a substance and the layer produced therefrom. Both quantities depend on the deformation frequency and the temperature.

The sizes can be determined with the help of a rheometer. The layered material to be examined is exposed to a sinusoidally oscillating shear stress in a plate-and-plate arrangement, for example. In shear stress controlled devices, the deformation as a function of time and the time lag of this deformation are compared with the introduction of the shear stress measured. This time offset is referred to as phase angle d.

The storage modulus G 'is defined as follows: G' = (T / y) cos (ö) (t = shear stress, g = deformation, d = phase angle = phase shift between shear stress and shear stress) Deformation vector). The definition of the loss modulus G "is: G" = (T / Y) sin (ö) (t = shear stress, g = deformation, d = phase angle = phase shift between shear stress vector and deformation vector).

A fabric and the layer produced therefrom are generally considered to be tacky and are defined as tacky, if at room temperature, here by definition at 23 ° C, at least a portion of the G 'curve lies within the window, through the deformation frequency range including 10 ° to 10 ¹ rad / sec (abscissa) and the range of G 'values of 10 ³ to and including 10 ⁷ Pa (ordinate) is spanned, and if at least a portion of the G "curve also within this Window is located. Substances of this type are sometimes referred to as viscoelastic substances and the layers produced therefrom as viscoelastic layers. The terms tacky and viscoelastic are considered as synonymous terms in this invention. Accordingly, a pressure-sensitive adhesive carrier layer in this invention means a viscoelastic carrier layer within said limits for G 'and G ".

Preferably, the first outer tacky adhesive side (a) is the outside of a chemically crosslinked pressure-sensitive adhesive layer or a chemically crosslinked pressure-sensitive adhesive carrier layer. The terms pressure-sensitive adhesive layer and adhesive layer are used as synonyms for the purposes of the present invention.

A chemically crosslinked pressure-sensitive adhesive layer or a chemically crosslinked pressure-sensitively adhesive carrier layer is present when the pressure-sensitive adhesive layer or adhesive-sticky carrier layer has reached a state by chemical reaction with a crosslinker that no longer fuses it and no longer solves it in organic solvents. A liquefaction is then possible only by decomposition, which is irreversible. Suitable crosslinkers are all at least difunctional substances which can undergo chemical crosslinking reactions with the functional groups of the pressure-sensitive adhesive. Their selection depends on the functional groups of the pressure-sensitive adhesive. Carboxyl-bearing pressure-sensitive adhesives are typically crosslinked with di- or polyepoxides, possibly with additional catalysis, for example by tertiary amines, or with metal acetylacetonates, metal alkoxides and alkoxy metal acetylacetonates. For example, diisocyanates or polyisocyanates are suitable for crosslinking pressure-sensitive adhesives bearing hydroxyl groups. The term "thermal initiation" refers that the crosslinker or the crosslinking system consisting of crosslinker, accelerator and / or initiator, by the action of temperature, the chemical crosslinking reaction and not by radiation. The chemical crosslinking reaction is accordingly activated and triggered by the action of temperature. For the thermally initiated crosslinks, systems are also expected in this invention in which the activation energy can be overcome already at room temperature or below without additional application of radiation, in which case the crosslinking reaction already proceeds at room temperature or below. The crosslinking reactions in this invention are thus initiated neither by actinic nor by ionizing radiation such as UV, X-ray nor electron beams.

In a preferred method, the pressure-sensitive adhesive side (a) is produced in a hot-melt process, in particular an extrusion process. For this purpose, the pressure-sensitively adhesive material from which the pressure-sensitive adhesive layer chemically crosslinked by thermal initiation or the pressure-sensitive adhesive layer chemically crosslinked by thermal initiation is introduced in the molten state into a continuously operating mixing unit, preferably an extruder. In the continuous mixing unit, the crosslinking system is further introduced, so that the crosslinking reaction is started. This is followed by the discharge of the not yet cross-linked melt from the mixing unit and the immediate coating and shaping of the pressure-sensitive adhesive layer. Meanwhile, the crosslinking reaction started progressing so that the pressure-sensitive adhesive layer has reached its crosslinked state a short time later. The main advantages of this method are that high coating speeds can be realized and that thicker layers can be produced than with a solvent-based method. Surprisingly, pressure-sensitive adhesive layers which have been produced by such a method can be bonded to thermoplastic layers with high bond strength according to the invention.

In an advantageous embodiment of the invention, the pressure-sensitive adhesive layer is foamed or has a foam-like consistency. The foam or the foam-like consistency may have been produced by the inputs or by the chemical production of one or more gases in the polymer matrix or by the use of micro-glass beads, hollow glass microspheres and / or micro-plastic balls of all kinds. Mixtures of the substances mentioned can also be used. The microplastic balls can be used pre-expanded or in a non-pre-expanded, expandable form, wherein it comes in the course of the manufacturing process for expansion. The expandable microplastic balls, also called microballoons, are elastic hollow spheres which have a thermoplastic polymer shell; they are therefore also referred to as expandable polymeric microspheres. These balls are filled with low-boiling liquids or liquefied gas. In particular, polyacrylonitrile, polyvinyldichloride (PVDC), polyvinyl chloride (PVC), polyamides or polyacrylates are used as the shell material. Hydrocarbons of the lower alkanes, for example isobutane or isopentane, which are enclosed in the polymer shell as a liquefied gas under pressure, are particularly suitable as the low-boiling liquid. By acting on the microballoons, in particular by a heat - especially by heat or heat generation, for example by ultrasound or microwave radiation - softened on the one hand, the outer polymer shell. At the same time, the liquid propellant gas in the casing changes into its gaseous state. For a given pairing of pressure and temperature, referred to herein as critical pairing, the microballoons expand irreversibly and expand three-dimensionally. The expansion is completed when the internal and external pressures equalize. As the polymeric shell is preserved, this results in a closed-cell foam. A variety of microballoon types are commercially available, such as Akzo Nobel's Expancel DU grades (dry unexpanded), which are essentially sized (6 to 45 microns in unexpanded state) and their starting temperature required for expansion (FIG. 75 ° C to 220 ° C) differentiate.

Furthermore, unexpanded microballoon types are also obtainable as an aqueous dispersion having a solids or microballoon fraction of about 40 to 45% by weight, and also as polymer-bound microballoons (masterbatches), for example in ethylvinyl acetate having a microballoon concentration of about 65% by weight. , Furthermore, so-called microballoon slurry systems are available in which the microballoons are present with a solids content of 60 to 80 wt .-% as an aqueous dispersion. Both the microballoon dispersions, the microballoon slurries and the masterbatches are, like the DU types, suitable for foaming in accordance with the advantageous development of the invention.

Due to their flexible, thermoplastic polymer shell, the foams produced with microballoons have a higher gap bridging capability than those which do not expandable, non-polymeric hollow microspheres (such as glass or ceramic hollow spheres) are filled. Therefore, they are better suited to compensate for manufacturing tolerances, as they occur for example in injection molded parts. Furthermore, such a foam can better compensate for thermal stresses.

For example, by selecting the thermoplastic resin of the polymer shell, the mechanical properties of the foam can be further influenced. For example, it is possible to make foams having higher cohesive strength than the polymer matrix alone, although the foam has a lower density than the matrix. Furthermore, typical foam properties such as adaptability to rough substrates with a high cohesive strength can be combined for pressure-sensitively adhesive foams.

In a preferred embodiment, the pressure-sensitive adhesive side (a) of the adhesive tape is the outside of an adhesive layer based on a known, chemically crosslinked by thermal initiation polyacrylate pressure-sensitive adhesive. Suitable crosslinkers for polyacrylate pressure-sensitive adhesives are di- or polyisocyanates, in particular dimerized or trimerized isocyanates, di- or polyepoxide compounds, epoxide-amine crosslinker systems, and for coordinative crosslinking metal acetylacetonates, metal alkoxides and alkoxy-metal acetylacetonates, in each case in the presence of functional groups in the polymer macromolecules which can react with isocyanate groups or epoxide groups and can form coordinative compounds with the metal compounds.

Advantageous crosslinker systems and suitable processes for allowing melt polymers to be processed with such crosslinkers are described, for example, in EP 0 752 435 A, EP 1 802 722 A, EP 1 791 921 A, EP 1 791 922 A, EP 1 978 069 A, DE 10 2008 059 050 A. The relevant disclosure of these documents is therefore explicitly incorporated in the disclosure of this invention. In this case, the crosslinker or, in the case of crosslinker systems, at least one constituent of the crosslinker system (for example either the crosslinker or the accelerator) is added to the melt late and mixed in very homogeneously (by an efficient mixing, for example in the extruder) by the residence time of the reactive system in the polymer melt very short and therefore to make the processing time ("pot life") as long as possible. The essential part of the crosslinking reaction takes place only after the formation of the polymer, in particular after its formation to the layer, instead of, preferably at room temperature. By this procedure, two procedural aspects can be optimized to each other, namely on the one hand as little as possible crosslinking reaction prior to molding to unwanted and uncontrolled pre-crosslinking and the corresponding gelling (formation of highly crosslinked areas - for example specks - within the polymer melt) largely avoided, on the other hand but the highest possible mixing efficiency of the crosslinker or the

Crosslinker system components in the relatively short residence time in the polymer melt prior to coating to actually guarantee a very homogeneously cross-linked end product.

Particularly preferred crosslinking of polyacrylate pressure-sensitive adhesives having functional groups which are suitable for entering into linking reactions with epoxide groups has been found to be a crosslinker accelerator system comprising at least one epoxide group-containing substance as crosslinker and at least one at a temperature below the melting temperature of the polyacrylate for the linking reaction accelerating substance as accelerator. Suitable epoxide-containing substances are, for example, multifunctional epoxides, in particular bifunctional or trifunctional (ie those epoxies having two or three epoxide groups), but also higher-functional epoxides or mixtures of differently functional epoxides. As accelerators may preferably amines (formally be considered as substitution products of ammonia), for example, primary and / or secondary amines; In particular, tertiary and / or multifunctional amines are used. It is also possible to use those amines which have a plurality of amine groups, where these amine groups may be primary and / or secondary and / or tertiary amine groups, in particular diamines, triamines and / or tetramines. In particular, those amines are selected which undergo no or only minor reactions with the polymer building blocks. As an accelerator can continue to be used, for example, those based on phosphate, such as phosphines and / or phosphonium compounds. In particular, polymers based on acrylates and / or methacrylates can be both foamed and crosslinked, it being advantageous for at least some of the acrylic esters to contain the functional groups and / or comonomers which have the functional groups to be present. As functional groups of the polymer to be crosslinked, in particular on (Meth) acrylate, especially acid groups (carboxylic acid, sulfonic acid and / or phosphonic acid groups) and / or hydroxyl groups and / or acid anhydride groups and / or epoxy groups and / or amine groups, selected and in particular adapted to the particular crosslinking agent. It is particularly advantageous if the polymer contains copolymerized acrylic acid and / or methacrylic acid.

The advantageous polyacrylate pressure-sensitive adhesives can further

Formulation ingredients such as fillers, resins, especially tackifying resins, plasticizers, flame retardants, anti-aging agents (antioxidants), light stabilizers, UV absorbers, rheological additives, and other auxiliaries and additives. second outer side (b) of the adhesive tape -

The second outer side (b) of the adhesive tape described herein may be a pressure-sensitive adhesive side of the double-sided adhesive tape, just like the first outer side (a). However, it is particularly preferred that the outer side (b) of the double-sided adhesive tape described herein is the outside of a heat-activatable layer and thus heat-sealable. The heat-activatable layer is particularly preferably a layer based on a thermoplastic, preferably a polyolefin or a polyolefin mixture. Thermoplastics form thermoformable, fusible and weldable layers, with the processes of molding, melting and welding being reversible and repeatable.

Preferred thermoplastics are polyamide, polyester, thermoplastic polyurethane and polyethylene vinyl acetate. Particularly preferred, in particular for the bonding of EPDM (i.e., ethylene-propylene-diene rubber) and other rubber profiles, are polyolefins or polyolefin copolymers or mixtures of the substances mentioned, in particular polypropylene copolymers. Particularly preferred are ethylene-propylene copolymers or blends of ethylene-propylene copolymers and other polyolefins.

One for the production of a composite of the adhesive tape according to the invention and a profile of EPDM or another rubber-like material by hot sealing the heat-activatable side of the adhesive tape on the profile particularly preferred ethylene-propylene copolymer has a DSC-determined melting temperature of between 140 ° C and 180 ° C inclusive, preferably between 150 ° C and 170 ° C inclusive. The abbreviation DSC stands for the known thermoanalytical method "differential scanning calorimetry" according to DIN 53765: 1994-03.

In a particularly preferred embodiment of the invention, the adhesive tape is an adhesive tape having a pressure-sensitive adhesive layer based on polyacrylate and a heat-activatable layer, wherein the pressure-sensitive adhesive layer and the heat-activatable layer are in direct contact with one another or are separated from one another by a carrier layer. In a particularly preferred embodiment of the invention, the heat-activatable layer is in direct contact with the pressure-sensitive adhesive layer based on polyacrylate. The surface of the heat-activatable layer, which in this case is in direct contact with the pressure-sensitive adhesive layer based on polyacrylate, may have been corona or plasma pretreated prior to the production of this contact.

wherein the corona or plasma pretreatment in an atmosphere of nitrogen, carbon dioxide or a

Noble gas or a mixture of at least two of these gases is carried out.

A corona pretreatment is a filamentary discharge surface treatment produced by high alternating voltage between two electrodes, the discrete discharge channels meeting the substrate surface to be treated. In particular, the term "corona" is usually understood to mean a "dielectric barrier discharge" (DBD). There is at least

one of the electrodes of a dielectric, so an insulator, or is coated or coated with such. The corona pretreatment is well-known as a method for surface pretreatment (see also Wagner et al., Vacuum, 71 (2003), pages 417 to 436) and is widely used industrially. Without further qualification, ambient air is assumed to be the process gas, which is not the case in this invention. The use of process gases other than air, such as nitrogen, carbon dioxide or noble gases, is also known in the art.

The substrate is placed or passed in the discharge space between an electrode and a counter electrode, which is defined as a direct physical treatment. Web-shaped substrates are typically carried out between an electrode and a grounded roller.

By a suitably high web tension, the substrate is pressed onto the counter electrode designed as a roller in order to prevent air pockets. The treatment distance is typically about 1 to 2 mm. A fundamental disadvantage of such a two-electrode geometry with a treatment in the space between electrode and counter electrode is the possible backside treatment. With the smallest air or gas inclusions on the back, for example, if the web tension is too low in a roll-to-roll treatment, there is a mostly unwanted corona treatment of the back.

Although, in a broader sense, corona treatment in air is a technique in which plasma plays a role, a plasma treatment at atmospheric pressure is usually understood to mean a narrower definition.

If a corona treatment takes place in air instead of in another gas mixture, for example based on nitrogen, it is sometimes even talked about plasma. A plasma treatment at atmospheric pressure in the narrower sense, however, is a homogeneous and discharge-free treatment. For example, by using noble gases, partly with admixtures, such a homogeneous plasma can be produced. The treatment takes place in a two-dimensional reaction chamber homogeneously filled with plasma.

The reactive plasma contains radicals and free electrons, which can react quickly with many chemical groups in the substrate surface. This leads to the formation of gaseous reaction products and highly reactive, free radicals in the surface. These free radicals can rapidly react by secondary reactions with other gases and form various chemical functional groups on the substrate surface. As with all plasma techniques, the generation of functional groups is in competition with material degradation.

The substrate to be treated can instead of the reaction space of a two-electrode geometry also be exposed only to the discharge-free plasma ("indirect" plasma). The plasma is then usually also in good approximation potential-free. The plasma is usually driven away by a gas flow from the discharge zone and passed to the substrate after a short distance. The lifetime (and thus the usable distance) of the reactive plasma, often called afterglow, is determined by the exact details of the recombination reactions and the plasma chemistry. Mostly an exponential decay of reactivity with distance from the discharge source is observed.

Modern indirect plasma techniques are often based on a nozzle principle. In this case, the nozzle can be round or linear, partially worked with rotary nozzles, without wishing to make a restriction here. Such a nozzle principle is advantageous because of its flexibility and its inherently one-sided treatment. Such nozzles, for example the company Plasmatreat GmbH (Germany), are widely used industrially for the pretreatment of substrates before bonding. Disadvantages are the indirect and less efficient since discharge-free treatment, and thus the reduced web speeds. However, the usual design of a round nozzle is particularly well suited to treat narrow webs such as an adhesive tape with a width of a few centimeters.

There are several plasma generators on the market that differ in plasma generation technology, nozzle geometry, and gas atmosphere. Although the treatments differ, inter alia, in terms of efficiency, the basic effects are usually similar and are mainly determined by the gas atmosphere used. A plasma treatment can take place in different atmospheres,

as a suitable atmosphere in this invention, nitrogen, carbon dioxide or a noble gas or a mixture of at least two of these gases has been found. In principle, it is also possible to add coating or polymerizing constituents to the atmosphere, as gas (for example ethylene) or liquids (aerosolized as aerosol). There is almost no limitation on the aerosols in question. In particular, the indirect plasma techniques are suitable for the use of aerosols, since there is no risk of contamination of the electrodes.

Since the effects of a plasma treatment are of a chemical nature and a change in surface chemistry is in the foreground, one can describe the methods described above as a chemical-physical treatment methods. Although there may be differences in detail, no particular technique is to be emphasized for the purposes of this invention, either the type of plasma generation or the type. Plasma pretreatment in this invention means an atmospheric pressure plasma pretreatment. As the atmospheric pressure plasma, in this invention, an electrically activated, homogeneous, reactive gas is defined, which is not in the thermal equilibrium, with a pressure close to the ambient pressure. The electrical discharges and ionization processes in the electric field activate the gas and generate highly excited states in the gas constituents. The gas or gas mixture used is called process gas. Basically, one can also coat the plasma atmosphere

or add polymerizing components as a gas or aerosol.

The term "homogeneous" indicates that no discrete, inhomogeneous discharge channels strike the surface of the substrate to be treated (even though they may be present in the production space).

The restriction "not in thermal equilibrium" means that the ion temperature may differ from the electron temperature. For a thermally generated plasma, they would be in equilibrium (see, for example, Akishev et al., Plasmas and Polymers, Vol. 7, No. 3, Sept. 2002).

With regard to the atmosphere according to the invention of nitrogen, carbon dioxide or a noble gas or a mixture of at least two of these gases, it must be ensured that there are no or at least only very small amounts of residual oxygen in this atmosphere. It is desirable to have oxygen contents of not more than 1000 ppm, preferably not more than 100 ppm, more preferably not more than 10 ppm.

The treatment intensity of a corona treatment is given as "dose" in [W-min / m ² ], with the dose D = P / (bv), with P = electrical power [W], b = electrode width [m], and v = Web speed [m / min].

The corona pretreatment is preferably carried out at a dose of 1 to 150 W-min / m ² . Particularly preferred are a dose of 10 to 100 W-min / m ² and in particular a dose of 20 to 80 W-min / m ² . According to the invention, the pressure-sensitive adhesive layer and the heat-activatable layer are preferably in direct contact with one another. By this is meant that between the corona or plasma pretreated surface of the heat-activatable layer, which is in direct contact with the pressure-sensitively adhesive layer, no additional further substances or layers are applied or are located there. Direct contact accordingly means that no additional adhesive, pressure-sensitive adhesive, adhesion-promoting or other substance is between or introduced into the layers. The direct contact between the layers is made by a conventional laminating or laminating process, preferably at room temperature. The laminating or lamination process is preferably carried out directly after the corona or plasma pretreatment of the surface of the heat-activatable layer. Between the corona or plasma pre-treatment of the surface of the layer and the laminating or laminating process pass ideally

only a few seconds, preferably less than 20 seconds, more preferably less than 10 seconds). The contact between the layers is preferably produced in the already chemically crosslinked state of the pressure-sensitively adhesive layer, ie at a time when the crosslinking reaction proceeding by thermal initiation has already progressed so far that the pressure-sensitive adhesive layer can no longer be melted. However, networking does not have to be complete at this time, but it can be.

Possible carrier layers which separate the heat-activatable layer and the polyacrylate-based pressure-sensitive adhesive layer in an alternative embodiment are not subject to any particular restrictions. For example, films, foams, nonwovens, adhesive layers, foamed adhesives, particularly preferably viscoelastic and foamed adhesives are used. The layer structure of the adhesive tape of the present invention is therefore not limited to a two-layer structure in which an adhesive layer is in direct contact with a heat-activatable layer.

release paper

The adhesive tape reel of the present invention comprises a release paper. The term "release paper" does not depict the present invention on paper in the classical sense. Rather, the present invention uses the term "release paper" as a synonym for the expression of "release liners" or "release liners". The release paper (release liner) as used herein has a first surface and a second surface, which for the purposes of the present invention are also referred to as release layer (A) and tear layer (B). Tenning layer (A) is in the wound state of the adhesive tape with the outer pressure-sensitive adhesive side (a) in contact; Release layer (B) is in the wound state of the adhesive tape with the outer side (b) of the adhesive tape in contact. Unlike conventional adhesive tape rolls of the prior art, therefore, not two separate release papers (liners) are used. Instead, a release paper (liner) is used according to the invention, which ensures a connection of the outer adhesive side (a) with the second outer side (b) of the double-sided adhesive tape in the wound state.

The release paper particularly preferably has a lower carrier layer (U) and an upper carrier layer (O), the separating layer (A) being the outer side of the lower carrier layer (U) and separating layer (B) being the outer side of the upper carrier layer (O). Particularly preferably, the carrier layers (O) and (U) are separable, more preferably irreversibly separable connected to each other.

Suitable carrier layers for the release paper are all known liner materials. The liner material may be flexible or relatively strong, transparent or opaque and, for example, colored. The separating layers (A) and (B) of the release paper are designed to have the desired adhesion to the first outer pressure-sensitive adhesive side (a) (in the case of the release layer (A)) and the desired adhesion to the second outer side (b). (In the case of the release layer (B)) have. As release layer (A), therefore, all known for the coverage of PSAs separating materials in question. The release layer (B) preferably consists of a polyolefin, provided that the outer side (b) of the double-sided adhesive tape is heat-activated. The release layer (A) is preferably a siliconized surface.

An exemplary structure (layer structure) of double-sided adhesive tape and release paper in the context of the present invention is shown in FIG. 1. Herein, "T" denotes the release paper; "A" the release liner (A), "B" the release liner (B), "a" the first outer tacky adhesive side (a) of the double-sided adhesive tape, "b" the second outer side (b) of the double-faced adhesive tape; "O" an upper support layer (O); "U" a lower support layer (U); "K" the double-sided adhesive tape; and "psa" a pressure-sensitive adhesive. The release paper T contains so preferably a lower and an upper carrier layer (U), (O). In FIG. 1, the lower carrier layer (U) is joined to the upper carrier layer (O) via a pressure-sensitive adhesive "psa". As a result, a release paper is provided, which has separably interconnected carrier layers. However, the bond between the upper and lower carrier layers ((U), (0)) is not limited to pressure-sensitive adhesives. Rather, other fasteners come into question, for example, curing adhesives such as paints or polymer layers, which are delaminated from the upper or lower carrier layer (O), (U). Also conceivable are laminating compounds for bonding upper and lower carrier layers, wherein the laminating compound forms a predetermined breaking point. Corresponding laminating compounds are disclosed in EP 2 130 886 A2 and can be provided in the form of full-area or non-full-surface connecting elements. Corresponding connecting elements are described in EP 2 130 886 A2 with regard to their function as "predetermined breaking point". Accordingly, for the connection of the upper and the lower carrier layer, polymers can be used which are preferably selected from the group comprising polyvinyl chlorides, polyvinylidene chloride, polyvinyl alcohols, polyvinyl acetates, polyvinylpyrrolidones, copolymers

of vinyl chloride and vinyl acetate. Wetting agents, defoamers, plasticizers and / or fungicides can be used as additives, for example. A preferred polymer disclosed in the above-mentioned document and also excellently usable in the present invention is a repulpable polymer, for example based on polyvinyl alcohol, preferably also comprising one or more plasticizers. Particularly preferred plasticizers are compounds such as polyols (for example diethylene glycol), hydroxy-modified rubbers or a

Combination of this. The laminating compounds are preferably selected so that they have no adhesive force in the form of their dried films, even at relatively high temperatures, so that they do not contaminate any machine parts or production goods after the upper and lower carrier layers have been separated.

In a further embodiment of the invention, the release paper can also consist of a cleavable carrier which decays without an adhesion-promoting adhesive or a connecting polymer into a lower and an upper carrier layer, if corresponding forces act in the region of the predetermined breaking point. In a particularly preferred embodiment of the invention, the release paper has an upper and a lower carrier layer ((O), (U)), which are connected to one another in such a way that they can be separated from one another with a splitting force of 0.2 to 200 cN / cm ,

According to the invention, at least one of the separating layers (A) and (B) extends over at least one edge region of the adhesive tape. This can be achieved by dimensioning the release paper so that its width is greater than the width of the double-sided adhesive tape. When the release paper extends over an edge portion of the double-sided adhesive tape, the release paper is dimensioned such that its width exceeds the width of the double-sided adhesive tape by 5% or more, preferably by 10% or more, more preferably by 20% or more preferably the width does not exceed 1, 5 times the tape width. If the release paper or at least one of the release layers (A) and (B) of the release paper extends over both edge regions of the adhesive tape, the width of the release paper or the respective release layer (s) exceeds the width of the adhesive tape by 10%, preferably 20% , preferably 40% or more, wherein the total width of the release paper preferably does not exceed twice the width of the adhesive tape.

The thickness of the adhesive tape described herein is, for example, 1 μm to 10 mm, preferably 100 μm to 5 mm, particularly preferably 200 μm to 2 mm. Particular embodiments of the adhesive tape reel described herein have a length of the adhesive tape of from 1 to 2000 m, preferably from 10 to 1500 m, more preferably from 200 m to 1000 m. The width of typical adhesive tapes ranges from 1 to 1000 mm. Preferred adhesive tape widths are 10 to 500 mm, more preferably 10 to 200 mm.

Process for producing the adhesive tape roll according to the invention

In a further aspect, the present invention relates to a method for producing the described adhesive tape roll. The method according to the invention comprises the following steps:

Providing a roll core; - Providing a double-sided adhesive tape having a first outer adhesive side (a) and a second outer side (b);

- Providing a release paper with a release layer (A) and a release layer

(B);

- bringing the adhesive tape into contact with the release paper; and

- Winding the adhesive tape and the release paper to the roll core, so that the first outer tacky side (a) and the second outer side (b) are separated by the release paper, wherein the release layer (A) of the release paper in the wound state of the adhesive tape with the outer pressure-sensitive adhesive side (a) of the adhesive tape is in contact, and the release layer (B) in the wound state of the adhesive tape is in contact with the outer side (b) of the adhesive tape.

In the inventive production of the adhesive tape reel described herein, the release paper is preferably radially outward. In other words, in a preferred embodiment of the invention, the adhesive tape is preferably connected via one of the outer sides of the adhesive tape ((a), (b)). It is also possible, however, first the release paper, for example via the release layer (B), i. preferably via the outside of the upper carrier layer (O) to bring into contact with the roll core and to wind accordingly.

By using a single release paper, it is inventively possible to provide adhesive tape rolls, which have a very high stability even at low winding tension. This avoids excessive squeezing and running of the pressure-sensitive adhesive, so that blocking of the adhesive tape can be avoided even if the adhesive tape is very thick, the degree of crosslinking of the pressure-sensitive adhesive layer is low or the side edges of the adhesive tape are too large. Typical winding tensions suitable for making the adhesive tape rolls described herein are from 1.4 to 490 cN / cm. To avoid blocking, a distance of 0.5 mm to 10 mm, preferably 1 mm to 5 mm, particularly preferably from 1, 5 mm to 2.5 mm can be selected between the adjacent turns of a layer of the actual adhesive tape. Such a distance is called in technical language underlap. Conveniently, the liner is made so wide that results in an overlap but for him. Corresponding distances have proven to be particularly advantageous for customary adhesive tape widths of 2 to 43 mm, preferably 3 to 25 mm, particularly preferably 4 to 15 mm, and especially for 8.5 mm, the most common width for the adhesive strips for attaching door seals to cars , To prevent misunderstandings: Winding pitch = distance + tape width. Winding pitches preferred according to the invention are 3.5 to 53 mm.

If the adhesive tape reel is therefore not provided in pan-cake form (ie a spiral) but the adhesive tape is wound up with axial feed and thus at an angle to the reel core, the angle should nevertheless be selected as low as possible. This is advantageous in order - depending on the adhesive tape length - to wind up adhesive tape as long as possible and to avoid deformations due to excessive deflections on the coil edges under tension. The angle is given by the circumference of the coil or of the coil core (for example, 6 inches inner diameter, core wall thickness, for example, 5 mm) and the adhesive tape width + turn pitch (also called "installation spacing"). This results in the maximum angle of a coil at the core, which decreases radially outward over the constant laying distance. Typical installation angles vary from 0.1 ° to 6.2 °.

The adhesive tape reel according to the invention differs from the prior art by the use of a single release paper and is accompanied by surprising stability values. In particular, it has been found that the use of a single release liner (release paper) as described herein, in comparison to two separate release liners at the same winding tension leads to significantly increased stabilities. As a test for the detection of the stabilities, a so-called "drop test" is suitable, as described in EP 2 746 356 A1 (from section [0146]). In particular, the use of the release paper described herein, in comparison to adhesive tape rolls with two separate release papers at the same winding tension leads to a lower displacement of adjacent adhesive tape webs in the drop test. The drop test ideally delivers values that are between 0.5 and a maximum of 50 mm. The increase in stability can be further improved by dimensioning the release paper of the adhesive tape reel according to the invention such that at least one of the release layers (A) and (B) of the release paper protrudes beyond both edge regions of the adhesive tape. In this context was found that particularly advantageous results are achieved when the release layer (B) extends over both edge regions of the adhesive tape. In this context, embodiments in which the separating layer (B) is the outer side of an upper carrier layer (O) and in which the upper carrier layer (O) both over both edge regions of the adhesive tape and over the edge regions of the lower carrier layer (U ) stands out. Most preferably, the upper backing layer (O) has a pressure-sensitive adhesive coating, this coating being applied to the side of the upper backing layer (O) which is bonded to the lower backing layer (U). Since, according to this advantageous embodiment, the upper carrier layer (O) extends over the edge regions of the adhesive tape on the one hand and over the edge regions of the lower carrier layer (U), this pressure-sensitive adhesive layer can impart further stability to the adhesive tape in the wound-up state, ie the adhesive tape roll ,

Adhesive tape rolls in which the release paper has tear-resistant layers (A) and (B), which are the outer sides of a lower carrier layer (U) and an upper carrier layer (O), are particularly particularly advantageous in the sense of the present invention and in which the lower carrier layer (U) has the width and dimension of the double-sided adhesive tape, wherein the edge regions of the adhesive tape terminate with the edge regions of the lower carrier layer. The upper carrier layer (O), however, is preferably larger in size. As described, the upper carrier layer (O) preferably extends over both edge regions of the adhesive tape and thus preferably also over both edge regions of the lower carrier layer (U). Also conceivable, however, is an embodiment in which the upper carrier layer extends only on one side over the edge region of the adhesive tape. It is also conceivable in such embodiments that extends, for example, the right boundary edge of the upper carrier layer (O) over the edge region of the adhesive tape (K) and over the edge region of the lower carrier layer (U), whereas the left edge region of the upper carrier layer (O) not beyond the lower carrier layer (U) / the adhesive tape (K) protrudes but, for example - with respect to the center of the adhesive tape - is arranged offset inwards. A corresponding embodiment is shown in FIG. In FIG. 2, the designations "O", "U", "K" have the same meaning as in FIG. 1. In short, the invention can be summarized as proposing a liner suitable for covering an adhesive tape. This liner is fissile. The invention further teaches a double-sided adhesive tape covered with this liner and a spool of such adhesive tape wound thereon. The liner according to the invention should project beyond at least one of the two edges of the actual adhesive tape. The invention reduces the tendency of the covered tape to drape when winding and unwinding a thick, preferably foamed adhesive tape. It also makes such a coil more stable. The invention also includes a method for producing this adhesive tape reel; and the use thereof for the production of composite articles, in particular for the self-adhesive finishing of profiles.

Claims

claims

1 . Liner suitable for covering an adhesive tape, characterized in that it is fissile.

2. Liner according to claim 1, which has a paper support in a conventional manner and on at least one of its two sides a non-stick coating, such as by siliconization, characterized in that the paper support is fissile.

3. Liner according to claim 1, which comprises a film carrier in a conventional manner, characterized in that two films are stacked and interconnected.

4. Liner according to claim 3, characterized in that its two films are joined together by a pressure-sensitive adhesive layer.

5. Liner according to claim 3, characterized in that its two films are interconnected by a thermosetting layer of adhesive, z. B. by a paint.

6. Liner according to claim 3, characterized in that its two films are welded together.

7. Liner at least according to claim 3, characterized in that the connecting means between the two layers is not applied over the entire surface but only screened so as to reduce the gap resistance to a convenient level.

8. Liner according to claim 3, characterized in that it is co-extruded at least two layers, wherein the materials of the two layers differ from each other so that their adhesion to each other is less than the cohesion within each of the individual layers.

9. Liner according to at least one of the preceding claims, characterized in that the gap resistance at a splitting speed of 300 mm / min between 0.2 cN / cm and 100 cN / cm is set.

10. adhesive tape, characterized in that it is covered with a liner according to at least one of claims 1 to 9.

1 1. An adhesive tape according to claim 10, characterized in that it is a double-sided adhesive tape.

12. Adhesive tape according to claim 1 1, characterized in that it is thick, namely preferably has a thickness between 200 and 1200 pm.

13. Adhesive tape according to claim 12, characterized in that it at least

- in its central area, if it is single-layered or

in its middle layer, when it is multi-layered,

foamed, preferably foamed in a closed cell.

14. Adhesive tape at least according to claim 11, characterized in that one (b) of its two sides (a, b) is heat-activated.

15. Adhesive tape at least according to claim 14, characterized in that the liner is attached to the pressure-sensitive adhesive side (a) of the adhesive tape.

16. Adhesive tape at least according to claim 10, characterized in that the liner projects beyond at least one of the edges of the actual adhesive tape.

17. Adhesive tape according to claim 16, characterized in that only the detachable part projects from the liner, which is not in direct contact with one or the pressure-sensitive adhesive side of the adhesive tape.

An adhesive tape spool comprising a roll core, a release paper, and a double-sided adhesive tape having a first outer pressure-sensitive adhesive side (a) and a second outer side (b), the adhesive tape being wrapped around the core such that the first outer adhesive-tacky side (a ) of the double-sided adhesive tape and the second outer side (b) of the double-sided adhesive tape are separated by the release paper, characterized in that the release paper comprises a release layer (A) in the wound state of the adhesive tape with the outer pressure-sensitive adhesive side (a) of Adhesive tape is in contact, and a release layer (B) which in the wound state of the adhesive tape is in contact with the outer side (b) of the adhesive tape, at least one of the release layers (A) and (B) extending over at least one edge portion of the adhesive tape.

The adhesive tape spool of claim 18, wherein the second outer side (b) of the adhesive tape is heat-activatable.

20. Adhesive tape spool according to at least one of claims 18 and 19, wherein separating layer (A) extends over at least one edge region of the adhesive tape.

21. Adhesive tape reel according to at least one of claims 18 to 20, wherein the adhesive tape has a width of 1 to 1000 mm and / or a thickness of 1 pm to 10 mm and / or a length of 1 to 2000 m.

22. An adhesive tape spool according to any preceding claim wherein the roll core is a cylinder having a length of 1 cm to 200 cm and a diameter of 3 mm to 50 cm.

23. An adhesive tape spool according to any preceding claim wherein the first outer pressure-sensitive adhesive side (a) of the adhesive tape is the outside of a polyacrylate pressure-sensitive adhesive layer.

24. An adhesive tape spool according to the preceding claim, wherein the pressure-sensitive adhesive layer is foamed on the basis of polyacrylate or has a foam-like consistency.

25. An adhesive tape spool according to one of the preceding claims, wherein the second outer side (b) of the adhesive tape is the outside of a heat-activatable layer based on a polyolefin or a polyolefin mixture.

26. Adhesive tape spool according to claim 23, comprising an adhesive tape having a polyacrylate-based pressure-sensitive adhesive layer and a heat-activatable layer, wherein the pressure-sensitive adhesive layer and the heat-activatable layer are in direct contact with one another or are separated from one another by a carrier layer.

27. Adhesive tape spool according to one of the preceding claims, wherein separating layer (A) the outer side of a lower carrier layer (U) and separating layer (B) is the outer side of an upper carrier layer (O) and the carrier layers (O) and (U) are separably connected to each other ,

28. Adhesive tape spool according to claim 27, wherein the lower carrier layer (U) and the upper carrier layer (O) are irreversibly separable connected to each other.

29. A method for producing an adhesive tape reel according to one of claims 18 to 28, wherein the method comprises the following steps:

- Providing a roll core;

- Providing a release paper with a release layer (A) and a release layer

(B);

- bringing the adhesive tape into contact with the release paper; and

30. Use of the adhesive tape reel according to one of claims 18 to 28 for the production of a composite article.

31. Use of the adhesive tape spool according to one of claims 1 to 11 for the bonding of profiles, in particular of a thermoplastic plastic, of ethylene-propylene-diene rubber, or of another rubber-like material.