Adhesive tape for wrapping elongated goods, wrapping process, use and elongated goods

Abstract

Adhesive tape (14, 19) for wrapping elongated goods, in particular cable harnesses, the adhesive tape comprising • a first support T(1) (11, 15) with a width B(T1) in the transverse direction, • an adhesive layer (13, 17) and • a second support T(2) (12, 16) with a width B(T2) in the transverse direction, wherein the adhesive layer (13, 17) is arranged between the first carrier T(1) (11, 15) and the second carrier T(2) (12, 16); wherein the first carrier (11, 15) is a textile fabric or a nonwoven, wherein the second carrier T(2) (12, 16) and the adhesive layer (13, 17) project on both sides relative to the side edges of the first carrier T(1) (11, 15), wherein the first projection has a width B(Ü1) and the second projection has a width B(Ü2), wherein the second carrier T(2) (12, 16) is formed in two parts with respect to its longitudinal direction, wherein the partial pieces T(2a) and T(2b) are spaced apart from one another, wherein the distance between the partial pieces T(2a) and T(2b) is not greater than the width of the projection in B(Ü1) with respect to the first carrier (11, 15), characterized in that the second carrier T(2) (12, 16) is a nonwoven carrier selected from the group consisting of staple fiber nonwovens, Kunitvlies, multiknitvlies, stitch-bonded nonwovens, needle-punched nonwovens, filament, meltblown and spunbonded nonwovens, which may be additionally consolidated, The fleece has a basis weight between 20 g / m 2 and 280 g / m 2 has.

Description

[0001] The present invention relates to an adhesive tape, preferably for wrapping elongated items such as, in particular, wires or cable harnesses, and to the use of the adhesive tape for wrapping elongated items. Furthermore, the invention relates to an elongated item, such as a wiring harness, wrapped with the adhesive tape according to the invention, and to a vehicle containing such a wrapped elongated item.

[0002] In many industries, bundles of numerous electrical cables are wrapped before installation or after assembly to reduce the space required by the cable bundle and also provide additional protection. Foil adhesive tapes provide a certain degree of protection against liquid ingress; adhesive tapes based on thick nonwovens or foam backings provide sound-dampening properties; and the use of abrasion-resistant, sturdy textile backing materials provides protection against chafing and rubbing.

[0003] In particular, the protective function against chafing, rubbing, grinding on sharp edges and burrs, etc., summarized here under the term abrasion resistance, is becoming increasingly important. The sharp edges, burrs, welds, etc. caused by production processes are increasingly less likely to be mitigated by complex rework, as this requires an additional work step and incurs additional costs. This applies particularly to body shells in the automotive industry, but also in other areas such as washing machines, vibrating machines such as compressors, and the like. Cable harnesses that run in such areas and that chafe against such sharp points due to vibration, relative movement, and the like are therefore potentially at risk of having their protective covering destroyed. This protective covering can be the additional wrapping bandage, but also the insulation around the copper cable itself.In this case, a short circuit with complete functional failure and destruction of electrical / electronic components, even a fire, would be the result, with the resulting risks of property damage and personal injury. To minimize such potential hazards, the cable harnesses at critical points are not only wrapped with standard wrapping tape, but additional precautions are taken. Either special adhesive tapes are used, or special protective components are employed. These can be, for example, cable ducts made of wear-resistant polymers such as polyamide, or corrugated pipes or braided sleeves made of polyester or polyamide yarns – all components that are disadvantageous in terms of cost, special logistics, and complex handling during installation.When installing corrugated pipes and cable ducts, for example, considerable effort is required to attach the elongated pipe systems and securely fix them to the cable bundle or the car body to prevent slipping. Special anti-rattle measures may also be necessary, as the cables in the pipe systems rarely fit tightly and therefore, when vibrated, create rattling noises with the hard materials of the pipes. Special adhesive tapes are also used in areas requiring increased abrasion and chafing protection. Adhesive tapes for wrapping cable harnesses or similar elongated systems with additional functionalities are well-known and are sometimes even used commercially.

[0004] The testing and classification of adhesive tapes for cable sheathing in the automotive industry is carried out according to extensive standards, such as the BMW standard GS95008-3-2 (2010-12) "Protection Systems for Cable Harnesses in Motor Vehicles - Longitudinal Bandages" or the Ford specification ES-KU5T-1A303-AA rev E (2017-06) "Harness Tape Performance Specification." These standards are referred to below as BMW specifications and Ford specifications, respectively. Other automobile manufacturers use largely comparable testing standards.

[0005] Abrasion resistance is a measure of the scrub resistance of adhesive tapes.

[0006] The international standard ISO 6722-1 (2011-10), Chapter 5.12.4.2 "Scrape abrasion test," has been established as a method for determining the abrasion resistance of protective systems in vehicle electrical systems. Based on ISO 6722-1, the abrasion resistance of adhesive tapes is tested according to BMW specifications. The test specimen, approximately 10 cm long, is attached to a 5 mm thick steel mandrel. It is important that the main carrier fits tightly against the mandrel and is secured so that it cannot slip during the abrasion test. A 0.45 mm diameter steel wire is used as the abrasion tool, which rubs across the center of the test specimen under a weight load of 7 N. The number of double strokes until the test specimen is destroyed is determined as a measure of the abrasion properties.

[0007] The test result is the abrasion class of the test specimen, specifying the mandrel diameter, weight load, and temperature during the test. Adhesive tapes are classified into classes A to G according to Table 1. Table 1: Classification of abrasion classes according to BMW GS95008-3-2 Abrasion class Requirement A no abrasion protection < 100 strokes B low abrasion protection 100 - 499 strokes C medium abrasion protection 500 - 999 strokes D high abrasion protection 1000 - 4999 strokes E very high abrasion protection 5000 -14999 strokes F extremely high abrasion protection 15000 - 29999 strokes G Abrasion protection for special applications ≥ 30,000 strokes

[0008] The temperature class for automotive use is defined by the Ford standard ES-KU5T-1A303-AA (2017-06). Sample cable harnesses are manufactured and covered with the tape product to be tested. These are stored for a period of 3,000 hours at the test temperature in an oven with 8 to 20 air changes. Every 500 hours, test samples are removed and bent around a 20 mm steel mandrel. The bent sample is visually inspected for cracks, melting, and loss of adhesive. Table 2: Classification of temperature classes according to Ford ES-KU5T-1A303-AA: Temperature Class Requirement A -40 to 85 °C B -40 to 100 °C C -40 to 125 °C D -40 to 150 °C E -40 to 175 °C

[0009] Hot water jet testing and moist heat storage have proven to be effective methods for testing the liquid tightness of adhesive tape products in use.

[0010] The hot water jet test is described in the BMW Group Standard GS 95008-3-2. Longitudinal bandages used in wet areas must withstand stresses such as those that can occur during cleaning with hot water devices. The test is carried out using a commercially available hot water jet device and a vertically clamped sample cable set. The ends of the longitudinal coating are fixed. A test specimen with a length of 600 mm is exposed to a hot water jet at a distance of 150 mm. The hot water jet is specified with a temperature of 80 °C, a pressure of 80 to 100 bar, and an opening angle of the flat jet nozzle of 35°. The longitudinal bandage must not show any cracks or visible damage after the hot water jet treatment. The coating must not have shifted or opened to such an extent that cables are exposed.

[0011] Damp-heat storage involves a climate with a temperature of 40°C and a constant saturated humidity. Longitudinal bandages used in the humid areas of an automobile are intended to keep any moisture away from the cable to be protected, thus providing additional moisture protection. Moisture acting on a longitudinal bandage over an extended period should not negatively affect the adhesive bond or lead to partial or complete loosening of the adhesive bond. The test is carried out on a test specimen where cables are covered with a longitudinal sheathing suitable for their circumference. This test specimen is exposed to the test climate for a period of four weeks. After the test, the cable is conditioned at room temperature for six hours.After bending around a mandrel (diameter of test mandrel = 5 x diameter of the test specimen), the test specimen must not show any cracks or detachments of the bonding point.

[0012] Noise attenuation is a measure of the reduction of annoying rattling and vibration noises from adhesive tapes and cable sheathing.

[0013] As a method for determining noise reduction, the procedure described in the BMW Group Standard GS 95008-3-2 has become established in the specifications of the automotive industry.

[0014] The BMW Group Standard GS95008-3-2 (2010-12) "Protection Systems for Wiring Harnesses in Motor Vehicles - Longitudinal Banding" specifies the following test procedure: a steel bar is dropped with a force of 0.16 N from a height of 20 mm onto an aluminum sheet (0.3 mm thick). The resulting noise is recorded using a microphone located 50 mm above the point of impact in the form of a sound pressure level (Lsp) with frequency weighting A and time weighting S. The main carrier of the longitudinal banding is fixed to the steel bar in the area of ​​the point of impact in a single layer with a length of 5 cm in the longitudinal direction. It is important that the main carrier fits tightly against the steel bar and is fixed in such a way that it cannot slip during the test. The difference between the noise of the uncovered bar and that of the bar covered with the longitudinal banding is measured in dB(A). The measurement is performed 10 times at the same point on the sample.

[0015] The attenuation is given in dB(A) as the difference between the zero value with a non-wrapped steel bar and the respective measured value on a steel bar wrapped with test material. Table 3 : Classification of noise reduction classes according to BMW GS95008-3-2: Noise reduction class Requirement A no noise reduction 0 to ≤ 2 dB(A) B low noise reduction > 2 to ≤ 5 dB(A) C medium noise reduction > 5 to ≤ 10 dB(A) D high noise reduction > 10 to ≤ 15 dB(A) E very high noise reduction > 15 dB(A)

[0016] Adhesive tapes with multi-layer backings are known for improving noise dampening and increasing abrasion resistance. Other sheathing solutions are also known, using products such as plastic pipes tailored to the cable diameter or braided hoses equipped with textile linings or textile coverings.

[0017] EP 1 723 210 A1 discloses a highly abrasion-resistant and noise-damping tape for bandaging cable harnesses. The tape consists of a carrier with a first cover layer A, which is firmly bonded to a second layer C over the entire surface of the cover layer A. The cover layer A can be velour, scrim, woven, or knitted fabric, and the layer C can be a porous sheet material such as a textile with an open but stable three-dimensional structure, such as a foam or a foamed film. Both cover layers have the same width and are bonded to one another over their entire surface by means of an additional adhesive layer without offset, so that their side edges are flush.

[0018] EP 1 911 824 A1 describes a cable wrapping tape with a band-shaped carrier formed as a composite of a woven fabric and a nonwoven fabric, which is fully coated at least on one side with a self-adhesive layer. The fabric has at least 20 warp threads per cm and at most 22 weft threads per cm. Both textile layers are of the same width and are bonded to each other across their entire surface by means of an additional adhesive layer without offset, so that their side edges are flush. Due to the two-layer construction, the adhesive tape is capable of meeting abrasion class E according to LV 312 on both a 5 mm diameter and a 10 mm diameter mandrel.

[0019] The two fully laminated materials, as described in EP 1 723 210 A1 and EP 1 911 824 A1, result in a higher stiffness, which has a disadvantageous effect on spiral winding and which leads in particular to flagging at the strip ends.

[0020] Flagging refers to the tendency of one end of an adhesive tape wrapped around a body to stick out. This is caused by a combination of the adhesive's holding force, the stiffness of the carrier, and the diameter of the cable harness.

[0021] By applying an adhesive coating to the entire surface of the carrier, contact between the adhesive and the cable sheath is unavoidable. This results in high rigidity of the cable harness, as the tape is bonded to the cable harness at every point by the adhesive.

[0022] When a cable harness is wrapped helically with adhesive tape, the individual windings overlap, resulting in up to four layers of textile on top of each other at these points, which also results in a very rigid cable harness. Due to the thickness of the resulting cable harness alone, the risk cannot be ruled out in the tight installation conditions prevalent in today's automotive industry that the adhesive tape will be damaged by sharp edges, tearing the cable bundle.

[0023] EP 2 034 576 A1 describes an adhesive tape comprising a carrier and an adhesive applied thereto, which has a largely tack-free inner surface, in that a second carrier is laminated onto the adhesive layer, the second carrier having a smaller width than the width of the first carrier, various embodiments being provided. For example, the second carrier can run flush with a side edge of the first carrier on one side edge, with the first carrier with the adhesive layer projecting beyond the other side edge of the second carrier. Alternatively, the first carrier with the adhesive layer can also project beyond the side edges of the second carrier on both sides, or it can be provided that the first carrier with the adhesive layer projects beyond a side edge of the second carrier on one side and the second carrier on the other side of the first carrier projects beyond a side edge of the first carrier on one side.Furthermore, it is also possible for the second carrier to consist of at least two separate carrier parts, wherein the first carrier part has a first width and the second carrier part has a second width, wherein the sum of the widths of the carrier parts is smaller than the width of the first carrier.

[0024] The described adhesive tape is not wrapped around a wiring harness in a helical pattern, as is usual, but rather in such a way that the longitudinal axis of the tape is essentially parallel to the direction of the wiring harness. Viewed in cross-section, the adhesive tape wraps around the wiring harness in the shape of an Archimedean spiral. This type of wrapping is also referred to as "wrapping the wiring harness" or "cigar wrapping." In the following, this type of wrapping is referred to as "longitudinal bandaging."

[0025] A longitudinal wrap can also be achieved using custom-made tubular sleeves, tailored to each cable diameter. For example, solutions from Bentley Harris, such as the TwistTube® and FlatWrap® products, are used here. These products, manufactured using a special weaving process, enclose the cables and give the wiring harness a round or flat shape. In both cases, abrasion protection is provided, and an adhesive tape product for noise dampening must also be applied, which is particularly time-consuming during wiring harness production. The open weave structure of such products does not retain fluids that may occur in the vehicle, but rather allows them to pass through to the installed cables, where this can cause damage to the cable insulation over time.

[0026] DE 20 2007 012 475 U1 describes an adhesive tape for longitudinally wrapping cables. The tape consists of a carrier material with an adhesive coating, which is particularly suitable for applications in the automotive and electrical industries, as it offers easy handling and reliable fixation.

[0027] DE 10 2021 201 856 A1 relates to a method and apparatus for producing a multilayer adhesive tape product with improved properties, particularly with regard to noise reduction and temperature resistance. The aim is to increase production efficiency and the quality of the final product.

[0028] DE 10 2011 079 114 A1 discloses a process for producing an adhesive tape with a textile surface that is characterized by high abrasion resistance and good noise dampening. It is particularly suitable for use in vehicles for bundling and protecting cable harnesses.

[0029] WO 2016 / 045 890 A1 describes an adhesive tape with a nonwoven backing and a special adhesive formulation that is characterized by good hand tearability and high temperature resistance. It is intended particularly for applications in the automotive industry.

[0030] WO 2016 / 023 921 A1 relates to a method for producing an adhesive tape with a textured surface that offers improved noise dampening and flexibility. The tape is suitable for wrapping cable harnesses and other technical applications.

[0031] EP 1 300 452 A2 describes a method for sheathing elongated products, particularly cables, with an adhesive tape having a textile surface. The goal is a durable, flexible, and noise-damping sheath that is easy to process.

[0032] In light of the disadvantages still inherent in the solutions offered in the prior art, the object of the invention is to provide an adhesive tape that offers the possibility of bandaging individual wires into cable harnesses with high protection against mechanical damage caused by chafing and rubbing against sharp edges, burrs, or weld points, while simultaneously being sufficiently sound-damping to enable trouble-free wrapping of elongated items. Furthermore, it is desirable that the material be as lightweight as possible while maintaining strength and protection against abrasion, and that it also offers protection against fluids that may occur in the vehicle.

[0033] This object is achieved by the use of an adhesive tape as characterized in the main claim. Advantageous embodiments of the invention are described in the subclaims.

[0034] Accordingly, the invention relates to an adhesive tape for wrapping elongated goods, in particular cable harnesses, comprising • a first support T(1) with a width B(T1) in the transverse direction, • an adhesive layer and • a second carrier T(2) having a width B(T2) in the transverse direction, wherein the adhesive layer is arranged between the first carrier T(1) and the second carrier T(2); wherein the first carrier is a textile fabric or a nonwoven, wherein the second carrier T(2) and the adhesive layer project on both sides relative to the side edges of the first carrier T(1), wherein the first projection has a width B(Ü1) and the second projection has a width B(Ü2), wherein the second support T(2) is formed in two parts with respect to its longitudinal direction, wherein the parts T(2a) and T(2b) are spaced apart from each other, wherein the distance between the sections T(2a) and T(2b) is not greater than the width of the projection in B(Ü1) with respect to the first support, wherein the second carrier T(2) is a nonwoven carrier selected from the group consisting of staple fiber nonwovens, Kunit nonwovens, multiknit nonwovens, stitch-bonded nonwovens, needle-punched nonwovens, filament nonwovens, meltblown nonwovens and spunbonded nonwovens, which may be additionally consolidated, wherein the nonwoven has a basis weight of between 20 g / m 2 and 280 g / m 2 has.

[0035] Surprisingly, it has been found that the combination of the inventive adhesive tape structure with the selected material of the second carrier T(2) makes it possible to obtain a protective coating on the cable harness that combines high abrasion resistance and noise dampening. The inventive design can effectively block out unexpectedly penetrating liquids and media used in automobiles. Damage to the cable insulation to be protected by liquids, which can typically occur with prolonged exposure to liquids on the cable insulation, cannot occur.

[0036] The adhesive layer provided in the adhesive tape according to the invention can serve to further support the mechanical properties of the adhesive tape, whereby the adhesive layer can be applied partially or completely depending on the application. Therefore, an embodiment is preferred in which the adhesive layer covers the first carrier T(1) and / or the second carrier T(2) partially and / or completely. The partial coverage can be, for example, dot-shaped, wave-shaped, or strip-shaped.

[0037] To increase the flexibility of the adhesive tape according to the invention, the second carrier T(2) is formed in several parts. According to the invention, the second carrier T(2) is formed in two parts with respect to its transverse direction.

[0038] The second carrier T(2) is designed in two parts, it consists of two sections T(2a) and T(2b) which are arranged at a distance from each other.

[0039] The second carrier T(2) can be arranged offset on the carrier T(1) with respect to the latter. The sections T(2a) and T(2b) are arranged in the adhesive tape according to the invention such that the section T(2a) projects beyond the first carrier T(1) by a width B(Ü1) and the section T(2b) projects beyond the first carrier T(1) on the opposite side by a width B(Ü2) in its transverse direction. The adhesive layer also has a corresponding projection with respect to the first carrier T(1), the width of which coincides with the projection of the sections T(2a) and T(2b). In this way, when the elongated product is wrapped with the adhesive tape according to the invention, the adhesive layer can be brought into contact with the adhesive layer of the subsequent winding, thus achieving a flexible, yet stable wrapping.

[0040] The first carrier T(1) and the second carrier T(2) are arranged such that the sections of the carrier T(2) are arranged at a distance from one another on the carrier T(1), wherein the two sections T(2a) and T(2b) define a free surface on the carrier T(1). In a particularly preferred embodiment, this free surface is not covered by the adhesive layer, resulting in a non-adhesive section on the carrier T(1).

[0041] The distance between the sections T(2a) and T(2b) is not greater than the width of the projection in B(Ü1) relative to the first support. An embodiment in which the distance between the sections corresponds to the width of the projection B(Ü1) is particularly preferred.

[0042] The width of the sections T(2a) and T(2b) can be chosen arbitrarily, but an embodiment is preferred in which the sections T(2a) and T(2b) are of different sizes, wherein the section T(2a) is preferably larger than the section T(2b).

[0043] In a further preferred embodiment, the adhesive tape according to the invention can further comprise a cover, which can be adhesive or non-adhesive. In a particularly preferred embodiment, the adhesive tape according to the present invention is characterized in that it comprises a first carrier T(1), a second carrier T(2) which is applied to the first carrier T(1) in the form of spaced-apart sections T(2a) and T(2b), and an adhesive layer to which the sections of the second carrier T(2) are applied, wherein the adhesive tape further comprises a cover applied to the first carrier T(1), which cover can be adhesive or non-adhesive. In a particularly preferred embodiment, the cover is non-adhesive.

[0044] In a likewise preferred embodiment of the adhesive tape according to the invention, a first carrier T(1) coated with a first layer of adhesive and a two-piece carrier T(2) with the sections T(2a) and T(2b), each coated with a second layer of adhesive, are provided, wherein the components are arranged such that in each case adhesive layer lies on adhesive layer and the two sections T(2a) and T(2b) of the second carrier T(2) are spaced apart from one another and project on both sides relative to the side edges of the first carrier T(1).

[0045] In a further preferred embodiment of the adhesive tape according to the invention, said adhesive tape comprises a first carrier T(1), a second carrier T(2) and an adhesive layer arranged between the carriers, wherein the adhesive layer is applied in the form of at least two spaced-apart strips.

[0046] In order to further support the damping properties of the adhesive tape according to the invention, the first carrier T(1) of the adhesive tape according to the invention is a textile fabric or a nonwoven.

[0047] In principle, all known textile substrates, such as woven fabrics (including plain weave, twill, and satin weave) or nonwovens, can be used as the carrier T(1). Suitable nonwovens are described in detail below.

[0048] Cotton, polyamide, polyester, polypropylene, or viscose yarns are particularly suitable as starting materials for a textile carrier, preferably a fabric carrier. However, the present invention is not limited to the materials mentioned; rather, a variety of other yarns can be used to produce the fabric, as will be apparent to those skilled in the art without requiring inventive activity.

[0049] The yarns for producing the fabric carrier can be processed using atlas, twill or plain weaving methods known to those skilled in the art and form a fabric carrier for the subsequent adhesive coating.

[0050] By processing the textile fabric backing downstream of the weaving process, it can be prepared for adhesive coating. Common finishing steps include washing, setting at elevated temperatures, stretching, and applying finishes. A particularly advantageous finishing step is calendering, which involves smoothing the fabric using pressure and temperature between two rotating rollers. Calendering can effectively seal the backing fabric and reduce air permeability.

[0051] Advantageously, and at least in some areas, the textile carrier, preferably a fabric carrier, can have a smooth-ground surface on one or both sides, preferably a completely smooth surface in each case. The smooth-ground surface can be chintzed, as explained in detail, for example, in EP 1 448 744 A1.

[0052] According to a preferred embodiment of the invention, the basis weight of a preferred fabric carrier T(1) is between 30 g / m 2 and 180 g / m 2 .

[0053] All known nonwovens can be used as nonwoven backings for this purpose. "Nonwovens" includes at least textile fabrics according to DIN EN ISO 9092 (August 2019), as well as stitch-bonded nonwovens and similar systems. The woven backing and the knitted or nonwoven backing material do not necessarily have to be made of the same materials.

[0054] Nonwovens suitable for the invention include specially bonded staple fiber nonwovens, but also filament, meltblown, and spunbonded nonwovens, which usually require additional bonding. Mechanical, thermal, and chemical bonding are known as possible bonding methods for nonwovens. While mechanical bonding usually involves purely mechanically holding the fibers together by intermingling the individual fibers, intermeshing fiber bundles, or sewing in additional threads, adhesive (with binder) or cohesive (binder-free) fiber-fiber bonds can be achieved using thermal and chemical processes. With suitable formulation and process control, these bonds can be limited exclusively or at least predominantly to fiber nodes, so that a stable, three-dimensional network is formed while maintaining the loose, open structure in the nonwoven.

[0055] Nonwovens that are bonded by overstitching with separate threads or by interlacing have proven particularly advantageous. Such bonded nonwovens are produced, for example, on stitch-bonding machines of the "Malivlies" type from Karl Mayer, formerly Malimo, and are available from companies such as TENOWO GmbH and Technitex Sachsen GmbH. A Malivlies is characterized by the fact that a cross-fiber nonwoven is bonded by the formation of loops from the fibers of the nonwoven.

[0056] A nonwoven such as a Kunitvlies or Multiknitvlies can also be used as a backing. A Kunitvlies is characterized by the fact that it is produced by processing a longitudinally oriented fiber nonwoven into a fabric that has stitches on one side and stitch bars or pile fiber folds on the other, but has neither threads nor prefabricated fabrics. This type of nonwoven has also been produced for some time, for example, on stitch-bonding machines of the "Kunitvlies" type from Karl Mayer. Another distinguishing feature of this nonwoven is that, as a longitudinal fiber nonwoven, it can absorb high tensile forces in the longitudinal direction. A Multiknitvlies differs from a Kunitvlies in that the nonwoven is strengthened by piercing both sides with needles on both the top and bottom sides.

[0057] Finally, stitch-bonded nonwovens are also suitable for the present invention. A stitch-bonded nonwoven is formed from a nonwoven material with a multitude of parallel seams. These seams are created by sewing in or stitch-bonding continuous textile threads. Stitch-bonding machines of the "Maliwatt" type from Karl Mayer, formerly Malimo, are known for this type of nonwoven.

[0058] Needle-punched nonwovens are also particularly suitable. In these, fibers or nonwovens are needled into the pile using barbed needles. By alternately inserting and withdrawing the needles, the material is consolidated on a needle bar, where the individual fibers intertwine to form a solid fabric. The duration of this process determines the strength and rigidity of the fiber structures, which are generally lightweight, breathable, and elastic.

[0059] Another particularly advantageous option is a staple fiber nonwoven fabric that is first consolidated by mechanical processing, for example, by forming loops from the nonwoven fibers, by needling, by sewing with threads, or by air and / or water jet processing, with between 2% and 50% by weight of the nonwoven fibers being melt-bonded fibers, in particular between 5% and 40% by weight of the nonwoven fibers. In a second step, heat-setting takes place, whereby the strength of the nonwoven is further increased by the melting or partial melting of the melt-bonded fibers. The selection of different melting points for these melt-bonded fibers opens up the possibility of controlling the degree of consolidation by preselecting the temperature.

[0060] Another particularly advantageous option is a wet-laid nonwoven, which is hydrodynamically laid from a short fiber suspension. In the second step, the binder is added by spraying, pouring on the binder dispersion, foam impregnation, exchange impregnation, foam impregnation, or by printing the binder in a defined geometry. Subsequent drying gives the nonwoven the desired strength.

[0061] For the inventive use of nonwovens as carriers, the adhesive consolidation of mechanically pre-consolidated or wet-laid nonwovens is of particular interest. This can be achieved by adding binders in solid, liquid, foamed, or pasty form. In principle, a wide variety of dosage forms are possible, for example, solid binders as powder for trickling in, as film or as a mesh, or in the form of binding fibers. Liquid binders can be applied dissolved in water or organic solvents or as a dispersion. Binder dispersions are predominantly chosen for adhesive consolidation: thermosets in the form of phenol or melamine resin dispersions, elastomers as dispersions of natural or synthetic rubbers, or, most commonly, dispersions of thermoplastics such as acrylates, vinyl acetates, polyurethanes, styrene-butadiene systems, PVC, etc., as well as their copolymers.Normally these are anionic or non-ionic stabilized dispersions, but in special cases cationic dispersions can also be advantageous.

[0062] The type of binder application can be carried out according to the state of the art and can be found, for example, in standard works on coating or nonwoven technology such as “Vliesstoffe” (Georg Thieme Verlag, Stuttgart, 1982) or “Textiltechnik-Vliesstofferzeugung” (Arbeitgeberkreis Gesamttextil, Eschborn, 1996).

[0063] For mechanically pre-bonded nonwovens that already possess sufficient bond strength, the one-sided spray application of a binder is ideal for specifically modifying surface properties. In addition to the economical use of the binder, this procedure also significantly reduces the energy required for drying. Since no squeezing rollers are required and the dispersions remain primarily in the upper region of the nonwoven, undesirable hardening and stiffening of the nonwoven can be largely prevented. For sufficient adhesive bonding of the nonwoven backing, binder should generally be added in the range of 1% to 50%, particularly 3% to 20%, based on the weight of the nonwoven.

[0064] The binder can be added during nonwoven production, during mechanical pre-consolidation, or in a separate process step, which can be performed inline or offline. After the binder has been added, a state must be temporarily created for the binder in which it becomes adhesive and bonds the fibers adhesively. This can be achieved during the drying of dispersions, for example, or by heating, with further variations possible through the application of surface or partial pressure. The activation of the binder can take place in conventional drying channels, but with a suitable binder selection, also by means of infrared radiation, UV radiation, ultrasound, high-frequency radiation, or similar. The advantage is that thermal treatment removes volatile components such as fiber additives, thus producing a nonwoven with favorable fogging values.

[0065] Cotton, polyamide, polyethylene, polyester, polypropylene, or viscose fibers are particularly suitable as starting materials for the nonwoven backing. However, the present invention is not limited to the materials mentioned; rather, a variety of other fibers can be used to produce the nonwoven without requiring inventive activity, as will be apparent to those skilled in the art.

[0066] The basis weight of the nonwoven carrier is between 20 g / m 2 and 280 g / m 2 , in a particularly preferred embodiment between 30 g / m 2 and 220 g / m 2 .

[0067] With regard to the adhesives used in the adhesive tape according to the invention, all known adhesive systems can be used. In addition to natural or synthetic rubber-based adhesives, silicone adhesives and polyacrylate adhesives are particularly suitable, with the latter being particularly preferred.

[0068] The adhesive is preferably a pressure-sensitive adhesive, i.e., a viscoelastic compound that remains permanently tacky and adhesive at room temperature when dry. Bonding occurs immediately on almost all substrates with light contact pressure.

[0069] One adhesive that has proven particularly suitable is a low-molecular-weight acrylic hotmelt pressure-sensitive adhesive, such as BASF's acResin UV. This adhesive, with its low K value, achieves its application-specific properties through a final radiation-induced crosslinking process.

[0070] Other highly suitable adhesives are described in EP 2 520 627 A1, EP 2 522 705 A1, EP 2 520 628 A1, EP 2 695 926 A1 and EP 2 520 629 A1.

[0071] Particularly preferred is a pressure-sensitive adhesive in the form of a dried polymer dispersion, wherein the polymer is composed of: (a) 95.0 to 100.0 wt.% n-butyl acrylate and / or 2-ethylhexyl acrylate (b) 0.0 to 5.0 wt.% of an ethylenically unsaturated monomer having an acid or acid anhydride function

[0072] Preferably, the polymer consists of 95.0 to 99.5 wt.% of n-butyl acrylate and / or 2-ethylhexyl acrylate and 0.5 to 5 wt.% of an ethylenically unsaturated monomer having an acid or acid anhydride function, more preferably of 98.0 to 99.0 wt.% of n-butyl acrylate and / or 2-ethylhexyl acrylate and 1.0 to 2.0 wt.% of an ethylenically unsaturated monomer having an acid or acid anhydride function.

[0073] In addition to the listed acrylate polymers, tackifiers and / or additives such as light stabilizers or anti-aging agents may be added to the pressure-sensitive adhesive, in addition to any residual monomers present. In particular, no other polymers such as elastomers are contained in the pressure-sensitive adhesive; this means that the polymers of the pressure-sensitive adhesive consist only of monomers (a) and (b) in the specified proportions.

[0074] Preferably, n-butyl acrylate forms the monomer (a).

[0075] Advantageous monomers (b) include, for example, acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid and / or maleic anhydride.

[0076] Preferred is (meth-)acrylic acid of the formula I, where R 3 = H or CH3; if appropriate, a mixture of acrylic acid or methacrylic acid is preferably used. Acrylic acid is particularly preferred.

[0077] According to a particularly preferred variant, the polymer has the following composition: (a) 95.0 to 100.0 wt.%, preferably 95.0 to 99.5 wt.%, more preferably 98.0 to 99.0 wt.% of n-butyl acrylate and (b) 0.0 to 5.0 wt.%, preferably 0.5 to 5.0 wt.%, more preferably 1.0 to 2.0 wt.% acrylic acid

[0078] The polymer dispersion is prepared by emulsion polymerization of the aforementioned components. Descriptions of this process can be found, for example, in "Emulsion Polymerization and Emulsion Polymers" by Peter A. Lovell and Mohamed S. El-Aasser - Wiley-VCH 1997 - ISBN 0-471-96746-7 or in EP 1 378 527 B1.

[0079] During polymerization, it cannot be ruled out that not all monomers will be converted into polymers. It is obvious that the residual monomer content should be as low as possible. Adhesive compositions comprising the polymer dispersion with a residual monomer content of less than or equal to 1 wt.%, in particular less than or equal to 0.5 wt.% (based on the mass of the dried polymer dispersion) are preferred.

[0080] According to the general understanding of those skilled in the art, an “adhesive resin” is understood to mean an oligomeric or polymeric resin that increases the autoadhesion (tack, inherent stickiness) of the pressure-sensitive adhesive compared to a pressure-sensitive adhesive that does not contain an adhesive resin but is otherwise identical.

[0081] The use of tackifiers to increase the bond strength of pressure-sensitive adhesives is generally known. This effect also occurs when up to 15 parts by weight (equivalent to < 15 parts by weight) or 5 to 15 parts by weight of tackifier (based on the mass of the dried polymer dispersion) are added to the adhesive. Preferably, 5 to 12, more preferably 6 to 10 parts by weight of tackifier (based on the mass of the dried polymer dispersion) are added.

[0082] In principle, all known classes of substances are suitable as tackifiers, also known as adhesive resins. Examples of tackifiers include hydrocarbon resins (e.g., polymers based on unsaturated C5 or C9 monomers), terpene-phenolic resins, polyterpene resins based on raw materials such as α- or β-pinene, aromatic resins such as coumarone-indene resins, or resins based on styrene or α-methylstyrene, such as rosin and its derivatives, such as disproportionated, dimerized, or esterified rosin, for example, reaction products with glycol, glycerin, or pentaerythritol, to name just a few. Preferred resins are those without easily oxidizable double bonds, such as terpene phenol resins, aromatic resins, and particularly preferred resins produced by hydrogenation, such as hydrogenated aromatic resins, hydrogenated polycyclopentadiene resins, hydrogenated rosin derivatives, or hydrogenated polyterpene resins.

[0083] Resins based on terpene phenols and rosin esters are preferred. Adhesive resins with a softening point above 80°C according to ASTM E28-99 (2009) are also preferred. Resins based on terpene phenols and rosin esters with a softening point above 90°C according to ASTM E28-99 (2009) are particularly preferred. The resins are advantageously used in dispersion form. They can thus be easily mixed into the polymer dispersion to form a finely dispersed mixture.

[0084] The adhesive coating also preferably consists of an adhesive based on synthetic rubber, namely, in particular, an adhesive comprising at least one vinylaromatic block copolymer and at least one adhesive resin. Typical application concentrations for the block copolymer are in the range between 30 wt.% and 70 wt.%, in particular in the range between 35 wt.% and 55 wt.%.

[0085] Other polymers that may be present are those based on pure hydrocarbons, such as unsaturated polydienes such as natural or synthetically produced polyisoprene or polybutadiene, chemically substantially saturated elastomers such as saturated ethylene-propylene copolymers, α-olefin copolymers, polyisobutylene, butyl rubber, ethylene-propylene rubber, and chemically functionalized hydrocarbons such as halogen-containing, acrylate-containing or vinyl ether-containing polyolefins, which can replace up to half of the vinyl aromatic-containing block copolymers.

[0086] Tackifiers used are adhesive resins that are compatible with the elastomer block of the styrene block copolymers.

[0087] Other additives that can typically be used include light stabilizers such as UV absorbers, sterically hindered amines, antiozonants, metal deactivators, processing aids, and endblock reinforcing resins.

[0088] Plasticizers such as liquid resins, plasticizer oils or low molecular weight liquid polymers such as low molecular weight polyisobutylenes with molecular weights < 1500 g / mol (number average) or liquid EPDM types are typically used.

[0089] Fillers such as silicon dioxide, glass (ground or in the form of beads), aluminum oxides, zinc oxides, calcium carbonates, titanium dioxides, carbon blacks, to name just a few, as well as color pigments and dyes and optical brighteners can also be used.

[0090] Primary and secondary antioxidants are typically added to pressure-sensitive adhesives to improve their aging stability. Primary antioxidants react with oxy- and peroxyradicals, which can form in the presence of oxygen, to form less reactive compounds. Secondary antioxidants, for example, reduce hydroperoxides to alcohols. It is known that there is a synergistic effect between primary and secondary antioxidants, so the protective effect of a mixture is often greater than the sum of the two individual effects.

[0091] The application weights for the adhesive coating must be adapted to the respective substrates with regard to the roughness and absorbency of the surface to be coated and range between 40 and 100 g / m 2 for smooth, non-absorbent layers or up to 300 g / m 2 for open, structured layers, where 50 to 150 g / m 2are considered sufficient.

[0092] The general term “adhesive tape” in the sense of this invention includes all flat structures such as films or film sections extended in two dimensions, tapes with an extended length and a limited width, tape sections and the like, and ultimately also die-cuts or labels.

[0093] The adhesive tape can be produced in the form of a roll, i.e. rolled up on itself in the form of an Archimedean spiral.

[0094] A backing coating can be applied to the reverse side of the adhesive tape to favorably influence the unwinding properties of the adhesive tape wound into an Archimedean spiral. This backing coating can be coated with silicone or fluorosilicone compounds, as well as polyvinyl stearylcarbamate, polyethyleneiminestearylcarbamide, or fluoroorganic compounds as anti-adhesive substances.

[0095] By appropriately selecting the two components, carrier and adhesive, the coating can be varied widely. The choice of carrier used in the adhesive tape according to the invention allows for adjustment of the abrasion and temperature resistance, damping properties, as well as the color and appearance of the adhesive tape.

[0096] To ensure hand tearability for such a material combination, in a preferred embodiment of the invention, lines of weakness extend across the entire width of the adhesive tape. These lines of weakness are preferably designed in the form of perforations. This allows the adhesive tape to be easily severed and results in lint-free edges, thus preventing unwanted tearing.

[0097] To make work particularly easy for the user, the weakening lines are aligned at right angles to the running direction of the sheath and / or arranged at regular intervals.

[0098] The weakening lines can be produced particularly advantageously discontinuously with flat punches or transverse perforation wheels as well as continuously using rotary systems such as spiked rollers or punching rollers, if necessary using a counter roller (Vulkollan roller) which forms the counter wheel during cutting.

[0099] Further possibilities include controlled intermittent cutting technologies such as lasers, ultrasound, high-pressure water jets, etc. If part of the energy is introduced into the substrate as heat, as in laser or ultrasonic cutting, the fibers can be fused in the cutting area, thus largely preventing disruptive fraying and producing sharp cutting edges. These latter processes are also suitable for achieving special cutting edge geometries, such as concave or convex cutting edges.

[0100] The hole-to-web ratio during perforation—that is, how many millimeters hold the material together ("bridge"), how many millimeters are severed—determines how easily the fibers of the carrier material, in particular, can be torn. Furthermore, this ratio ultimately also influences how lint-free the tear-off edge can be. The web width is preferably approximately 0.2 mm, and the cut width between the webs is approximately 5 mm, i.e., 0.2 mm wide webs alternate with 5 mm cuts. The hole-to-web ratio is therefore preferably 0.2:5. This weakening of the material allows for a sufficiently low tear-off force.

[0101] In a preferred embodiment, the adhesive tape according to the invention comprises further components such as further carriers and further adhesives,

[0102] A further subject of the present invention is a method for wrapping elongated material using the adhesive tape according to the invention, wherein the adhesive tape is guided in the axial direction around the elongated material, preferably with an offset.

[0103] The adhesive tape according to the invention is particularly suitable for sheathing or wrapping elongated items, in particular cables and cable harnesses, as used, inter alia, in the automotive industry. Therefore, a further subject of the present invention is the use of an adhesive tape according to the present invention for sheathing elongated items such as cables in an automobile, wherein the elongated item is wrapped by the adhesive tape in the axial direction.

[0104] Furthermore, the inventive concept also encompasses an elongated product, such as in particular a cable harness, coated with the adhesive tape according to the invention, as well as a vehicle containing the coated elongated product.

[0105] The material coated according to the invention is not only characterized by very high abrasion and friction resistance, but also exhibits pronounced to outstanding noise dampening properties. Especially in cable harnesses in machines or automobiles, the need for abrasion protection is often directly linked to rattle protection requirements. A moving cable harness can rub against sharp edges and burrs, but can also generate rattling noises due to vibrations and counter-thrusts. If the winding process is capable of actively suppressing or reducing the occurrence of noise, additional costly noise dampening measures can be dispensed with. The selection of the carrier materials can prevent the penetration of liquids and thus the impairment of the cable insulation.

[0106] In the following, the invention will be explained in more detail with reference to several figures and examples, without wishing to limit the invention unnecessarily. Figures Fig. 1a shows an embodiment of an adhesive tape (14) according to the invention with a first carrier T(1) (11), a second carrier T(2) with the sections T(2a) and T(2b) (12) and an adhesive layer (13) arranged between the carriers, wherein the sections T(2a) and T(2b) are arranged at a distance from one another and each have a projection of the width B(Ü1) and B(Ü2) with respect to the first carrier. Fig.Figure 1b shows a further embodiment of an adhesive tape (19) according to the invention, comprising a first carrier T(1) (15), a second carrier T(2) (16) applied to the first carrier T(1) in the form of spaced-apart sections, and an adhesive layer (17) to which the sections of the second carrier T(2) are applied. A cover (18) is applied to the first carrier T(1), which can be adhesive or non-adhesive. Fig. 2 the use of the adhesive tape according to the invention for sheathing cables with a first carrier T(1) (41), a second carrier T(2a) / T(2b) (42, 43) and an adhesive layer (44) arranged between the carriers, wherein the adhesive tape is shown both before (45) and after the cable sheathing (46). Examples

[0107] Various carrier / adhesive layer combinations are produced which are combined to form an adhesive tape according to the invention by laminating two of the adhesive tapes together on the adhesive side.

[0108] Combine A has a carrier made of a fabric. The fabric is a plain weave fabric with a construction of 46 x 24 threads / cm, with the warp threads made of PET with a thread count of 150 D and the weft threads made of PET with a thread count of 200 D. The fabric is washed and heat-set before being coated on one side with a 95 g / m acrylic adhesive. 2 occurs.

[0109] The unit of thread thickness is denier (D) and is defined as follows: 1 D=1 gram per 9000 meters;

[0110] For a filament yarn, 15 D = 15 g / 9000 m.

[0111] A second combination B is formed from a nonwoven made of PET staple fiber with additional binder reinforcement. The staple fiber nonwoven consists of a mechanically pre-consolidated staple fiber web of 48 g / m 2 with subsequent binder imprint of 8 g / m 2 .

[0112] This carrier is coated with an acrylic adhesive with 65 g / m 2 equipped.

[0113] A third combine C has a nonwoven as a carrier in the form of a staple fiber nonwoven made of PET with an additional one-sided PE scatter coating, which is coated on the side facing away from the PE with an acrylate adhesive with 60 g / m 2 The mechanically pre-consolidated fleece with 60 g / m 2 is printed on one side with 26 g / m 2 PE scattering powder is applied and then passed through a heating section, whereby the scattering coating melts and lies on one side of the nonwoven fabric.

[0114] Further combinations D, E and F each have a staple fiber nonwoven fabric as a carrier, which is consolidated by needling, whereby the basis weights of the carrier are different: • 150 g / m 2 Adhesive tape D • 240 g / m 2 Adhesive tape E and • 320 g / m 2 Adhesive tape F

[0115] The fibers used in the nonwoven fabric consist of PET with an addition of 10 to 15 wt.% PET melt fibers, which melt at a defined temperature and form an additional fiber-fiber bond.

[0116] An acrylic adhesive with an application weight of 65 g / m 2 at Kombinat D and 85 g / m 2 coated at Combines E and F. Table 1 provides an overview of the adhesive tapes produced and the conventional products used for comparison purposes. Table 1: tape Surface weightT1 in g / m 2 Basis weightT2 in g / m 2 ThicknessT1 in µm ThicknessT2 in µm Combine T1 Combine T2 A B 230 120 260 330 A C 230 146 260 180 B D 120 215 330 890 A D 230 215 260 890 A E 230 325 260 1360 A F 230 405 260 1760 A A 230 230 260 260 Quiet Sleeve 3410 440 700 Quiet Sleeve 3470 460 830

[0117] The Quiet Sleeve 3410 used for comparison is a braided sleeve that is braided as a tubular product for each diameter. It uses a 1100 D PET multifilament combined with two 500 D PET monofilament threads. Both directions have 9 threads per cm, and the braid is easily adjustable to accommodate the cables.

[0118] Quiet Sleeve 3470, also used for comparison, is a plain weave tape fabric that is heat-treated to form a self-sealing tube. During use, the sleeve can be opened, cables inserted, and the sleeve resealed. The plain weave uses 1500 D PET multifilament with 10 warp threads per centimeter and 16 weft threads per centimeter, combining 1100 D PET multifilament with 550 D PET monofilament. The monofilament threads can be permanently deformed through heat treatment, keeping the material in its tubular shape.

[0119] The adhesive tapes according to the invention and the comparative products were tested for their abrasion resistance, damping, and liquid impermeability properties. The results are summarized in Table 2. Table 2 tape Abrasion at 5 mm strokes Attenuation in dB(A) Liquid tightness Combine T1 Combine T2 A B 3235 5 Yes A C 3370 5 Yes B D 550 18 Yes A D 5720 16 Yes A E 9155 19 Yes A F 17710 25 Yes A A 4530 3 Yes Quiet Sleeve 3410 360 13 no Quiet Sleeve 3470 985 14 no

[0120] As can be seen from the data, the adhesive tapes according to the invention have significantly improved abrasion resistance compared to conventional cable sheathing solutions.

[0121] Abrasion resistance was tested based on ISO 6722-1 according to BMW specifications as described above. The test specimen, approximately 10 cm long, was mounted on a 5 mm thick steel mandrel. A 0.45 mm diameter steel wire served as the abrasion tool, rubbing centrally across the specimen under a weight load of 7 N. The number of double strokes until the specimen was destroyed was determined as a measure of abrasion properties.

[0122] The liquid tightness of the adhesive tape products was determined according to hot water jet testing as described in the BMW Group Standard GS 95008-3-2 and the humid heat storage.

[0123] The hot water jet test was conducted using a commercially available hot water jet device and a vertically clamped sample cable set. The ends of the longitudinal coating were fixed. A test specimen with a length of 600 mm was exposed to a hot water jet at a distance of 150 mm. The hot water jet was specified at a temperature of 80 °C, a pressure of 80 to 100 bar, and an opening angle of the flat jet nozzle of 35°. The longitudinal bandage must not show any cracks or visible damage after the hot water jet treatment. The coating must not have shifted or opened to such an extent that any cables are exposed.

[0124] The damp heat storage test is performed on a test specimen in which cables were covered with a longitudinal sheathing suitable for their circumference. This test specimen was exposed to the test climate (temperature of 40 °C at constant saturated humidity) for a period of four weeks. After the test, it was conditioned at room temperature for six hours. The test specimen must not exhibit any cracks or detachments at the bonded joint after bending around a mandrel (test mandrel diameter = 5 x diameter of the test specimen).

[0125] The noise reduction was determined according to the procedure described in the BMW Group Standard GS 95008-3-2, which prescribes the following test procedure: A steel bar is dropped with a force of 0.16 N from a height of 20 mm onto an aluminum sheet (thickness 0.3 mm). The resulting noise is recorded using a microphone located 50 mm above the point of impact in the form of a sound pressure level (Lsp) with frequency weighting A and time weighting S. The main carrier of the longitudinal bandage is fixed to the steel bar in the area of ​​the point of impact in a single layer over a length of 5 cm in the longitudinal direction. It is important that the main carrier fits tightly to the steel bar and is fixed in such a way that it cannot slip during the test. The difference between the noise of the uncoated bar and the noise of the bar covered with the longitudinal bandage is measured in dB(A). The measurement is carried out 10 times at the same point on the sample.

[0126] The attenuation is given in dB(A) as the difference between the zero value with a non-wrapped steel bar and the respective measured value on a steel bar wrapped with test material.

Claims

[1] Adhesive tape (14, 19) for wrapping elongated goods, in particular cable harnesses, the adhesive tape comprising • a first support T(1) (11, 15) with a width B(T1) in the transverse direction, • an adhesive layer (13, 17) and • a second support T(2) (12, 16) with a width B(T2) in the transverse direction, wherein the adhesive layer (13, 17) is arranged between the first carrier T(1) (11, 15) and the second carrier T(2) (12, 16); wherein the first carrier (11, 15) is a textile fabric or a nonwoven, wherein the second carrier T(2) (12, 16) and the adhesive layer (13, 17) project on both sides relative to the side edges of the first carrier T(1) (11, 15), wherein the first projection has a width B(Ü1) and the second projection has a width B(Ü2), wherein the second carrier T(2) (12, 16) is formed in two parts with respect to its longitudinal direction, wherein the partial pieces T(2a) and T(2b) are spaced apart from one another, wherein the distance between the partial pieces T(2a) and T(2b) is not greater than the width of the projection in B(Ü1) with respect to the first carrier (11, 15), characterized by that the second carrier T(2) (12, 16) is a nonwoven carrier selected from the group consisting of staple fiber nonwovens, Kunitvlies, multiknitvlies, stitch-bonded nonwovens, needle-punched nonwovens, filament, meltblown and spunbonded nonwovens, which may be additionally consolidated, The fleece has a basis weight between 20 g / m 2 and 280 g / m 2 has. [2] Adhesive tape (14, 19) according to claim 1, characterized by that the adhesive layer (13, 17) covers the first carrier T(1) (11, 15) and / or the second carrier T(2) (12, 16) partially and / or completely. [3] Adhesive tape (14, 19) according to claim 1, characterized by that the section T(2a) is wider than the section T(2b). [4] Adhesive tape (14, 19) according to claim 3, characterized by that the section T(2a) projects beyond the first support (11, 15) by a width B(Ü1) and the section T(2b) projects beyond the first support (11, 15) on the opposite sides relative to its transverse direction by a width B(Ü2). [5] Adhesive tape (14, 19) according to claim 1, characterized by that the textile fabric of the first carrier (11, 15) is selected from the group consisting of cotton, polyethylene, polyester, polypropylene or viscose fibers. [6] Adhesive tape (14, 19) according to at least one of the preceding claims, characterized bythat the fleece has a basis weight between 30 g / m 2 and 220 g / m 2 has. [7] Adhesive tape (14, 19) according to at least one of the preceding claims, characterized by that the adhesive (13, 17) is selected from the group consisting of natural or synthetic rubber-based adhesives, silicone adhesives and polyacrylate adhesives. [8] Method for wrapping elongated material, using an adhesive tape (14, 19) according to at least one of claims 1 to 7, wherein the adhesive tape (14, 19) is guided in the axial direction around the elongated material, preferably with an offset. [9] Use of an adhesive tape (14, 19) according to at least one of claims 1 to 7 for sheathing elongated goods such as cables in an automobile, wherein the elongated goods are enveloped in the axial direction by the adhesive tape (14, 19). [10] Elongated product, in particular a cable harness, covered with an adhesive tape (14, 19) according to at least one of claims 1 to 7.

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