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EP4267688A1 - Procédé de production d'un ruban adhésif - Google Patents

Procédé de production d'un ruban adhésif

Info

Publication number
EP4267688A1
EP4267688A1 EP21840018.2A EP21840018A EP4267688A1 EP 4267688 A1 EP4267688 A1 EP 4267688A1 EP 21840018 A EP21840018 A EP 21840018A EP 4267688 A1 EP4267688 A1 EP 4267688A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
thickener
ase
dispersion
water mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21840018.2A
Other languages
German (de)
English (en)
Inventor
Alexander KUTTER
Lars Guldbrandsen
Daniel Schmitz-Stapela
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tesa SE
Original Assignee
Tesa SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tesa SE filed Critical Tesa SE
Publication of EP4267688A1 publication Critical patent/EP4267688A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/21—Paper; Textile fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/10—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an adhesive surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/548—No curing step for the last layer
    • B05D7/5483—No curing step for any layer
    • B05D7/5485—No curing step for any layer the two layers being applied simultaneously
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B05D2252/02—Sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
    • B05D2401/20—Aqueous dispersion or solution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/302—Applications of adhesives in processes or use of adhesives in the form of films or foils for bundling cables
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/20—Presence of organic materials
    • C09J2400/26—Presence of textile or fabric
    • C09J2400/263—Presence of textile or fabric in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2433/00—Presence of (meth)acrylic polymer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2433/00—Presence of (meth)acrylic polymer
    • C09J2433/003—Presence of (meth)acrylic polymer in the primer coating

Definitions

  • the invention relates to a method for producing an adhesive tape, comprising the steps: a) mixing a thickener, in particular ASE thickener, with water and producing an (ASE) thickener/water mixture; b) preparing an adhesive dispersion from an adhesive and a solvent; c) providing a textile carrier; d) applying the (ASE) thickener/water mixture to the textile backing; e) application of the adhesive dispersion to the (ASE) thickener/water mixture in order to obtain the adhesive tape; f) drying the adhesive tape obtained.
  • Adhesive tapes have long been used in industry to manufacture cable harnesses.
  • the adhesive tapes are used for bundling a large number of electrical lines before installation or in an already installed state, in order to reduce the space requirement of the line bundle by bandaging and to achieve additional protective functions.
  • DE 10 2011 075 160 A1 discloses an adhesive tape with a textile backing, to one side of which a pressure-sensitive adhesive is applied, and the pressure-sensitive adhesive is composed of a dried, electron beam-crosslinked, polymeric acrylate dispersion.
  • the acrylate dispersion includes monomeric acrylates and ethylenically unsaturated co-monomers that are not acrylates.
  • the PSA additionally contains between 10 and 100% by weight of a tackifier. First, an aqueous acrylate dispersion is applied to the carrier and then dried.
  • adhesive tapes for sheathing cables are known from EP 2 695 926 A1, having a backing and a dried polymer dispersion applied to one side of the backing, the polymer being composed of 95 to 100% by weight of ethyl acrylate and/or two ethylhexyl acrylate 0, 0 to 5.0% by weight of an ethylenically unsaturated monomer having an acid or acid anhydride function.
  • the problem with applying the polymer dispersion to the textile backing is the fact that low-viscosity polymer dispersions penetrate through the backing, since the backing has very large pores, is porous and/or permeable. This creates the problem that, on the one hand, a very large amount of polymer dispersion has to be used in order to achieve full-area application on one side of the textile; on the other hand, there is the problem that when the dried adhesive tape is wound up into a roll, the individual layers stick to one another and unwinding is no longer possible.
  • WO 2019/086705 therefore proposes providing a strip-shaped backing to which a thickener and separately an aqueous dispersion adhesive, in particular based on acrylate or polyurethane, are applied.
  • the aqueous dispersion adhesive and the thickener come into contact with one another after or during application. Then the dispersion adhesive is dried to obtain the adhesive tape.
  • a disadvantage of the adhesive tape disclosed there is that the range in which the viscosity of the thickener moves is naturally only small.
  • the application process and the properties of the finished adhesive tape can be controlled via the viscosity.
  • the options for varying the viscosity are limited, the options for varying the properties of the finished adhesive tape are also limited.
  • the thickener in particular ASE thickener
  • the thickener-water mixture in particular (ASE )Mixing of thickener and water takes place.
  • the viscosity of the thickener layer varies depending on the ratio of thickener, in particular ASE thickener, to water. This allows the properties of the thickener layer to be varied and consequently the properties of the adhesive tape, which can thereby be adjusted over a wide range. These controllable properties include the penetration depth of the adhesive dispersion, which in turn affects cohesion.
  • HASE hydrophobically modified alkali swellable emulsion
  • “Saturated with water” in the context of the present invention means that there is excess water in the (ASE) thickener-water mixture, i.e. all thickener has been used up and the (ASE) thickener-water mixture cannot bind any more water .
  • no pure thickener (100%) is used in the method of the present invention, but a thickener-water mixture.
  • the thickener layer serves as a buffer layer between the textile backing and the adhesive.
  • the properties of the adhesive tape can be controlled very well via the buffer layer. Depending on the thickness of the buffer layer, good or weak anchoring of the adhesive can be achieved. If the buffer layer is thick, the adhesive dispersion sinks in only slowly and only weak anchoring of the adhesive in the backing is achieved. If, on the other hand, only a thin buffer layer is used, the adhesive penetrates far into the backing, resulting in stronger anchoring of the adhesive. Due to the buffer layer in the form of the thickener, in particular ASE thickener, the amount of adhesive dispersion that has to be applied to the carrier decreases. Since the adhesive dispersion is more expensive than the thickener, the cost of the adhesive tape can be reduced in this way.
  • the thickener layer also causes the very irregular surface of the textile backing to be leveled. This allows the line pattern to be improved when the adhesive dispersion is applied, which in turn is reflected in improved adhesive strength.
  • Drying after the (ASE) thickener-water mixture and adhesive dispersion has been applied causes the water and any other solvents to evaporate, and a continuous polymer film is formed, which is located both on and in the textile backing.
  • the adhesive mass is concentrated near the surface.
  • the adhesive has a narrower distribution.
  • a particularly suitable viscosity of the (ASE) thickener-water mixture is achieved when the weight ratio of water to thickener, in particular ASE thickener, is from 1:1 to 10:1, particularly preferably from 1:1 to 5:1, in particular from is 1:1 to 2:1.
  • the weight ratio and the viscosity resulting therefrom leads to an adhesive tape in which a good compromise between the desired anchoring and the required amount of adhesive dispersion is achieved.
  • a particularly good anchoring in the textile backing is achieved with the method according to the present invention when the (ASE) thickener-water mixture of 5 to 25 wt .-%, preferably from 10 to 20 wt .-%, a Adhesive, particularly preferably the same adhesive that is also contained in the adhesive dispersion contains.
  • a Adhesive particularly preferably the same adhesive that is also contained in the adhesive dispersion contains.
  • the adhesive dispersion preferably has a solids content of from 10 to 70% by weight, in particular from 50 to 60% by weight of adhesive, and the thickener layer has a solids content of in particular from 10 to 20% by weight of adhesive. Particularly good anchoring of the adhesive in the textile backing is achieved in this way. Furthermore, the amount of adhesive used is reduced without the adhesive performance deteriorating.
  • up to 20% by weight, preferably up to 10% by weight, in particular up to 5% by weight, of a thickener are used in the adhesive dispersion.
  • the viscosity of the adhesive dispersion can thus be adjusted in such a way that the adhesive dispersion can be applied particularly effectively to the thickener layer, both when the (ASE) thickener/water mixture and adhesive dispersion are applied slightly at different times and when applied simultaneously.
  • the method according to the invention results in significantly less thickening of the adhesive dispersion, which means that it is still easy to handle, easy to pump and easy to apply.
  • the top layer preferably has a higher adhesive content than the bottom layer.
  • the (ASE) thickener-water mixture can be applied immediately before the aqueous dispersion adhesive.
  • the time difference is preferably from 0.1 ms (in particular when using a double nozzle) up to 100 s (when using a second separate coating system), particularly preferably from 0.5 ms to 20 s, very particularly preferably from 1 ms to 10 s and in particular from 1 ms to 10 ms, in each case provided that coating is carried out wet-on-wet in one operation.
  • the (ASE) thickener/water mixture and the aqueous dispersion adhesive are applied simultaneously.
  • the invention makes use of the idea of not immediately applying a highly viscous dispersion adhesive to one side of the backing layer and drying it, thereby producing an adhesive tape that can be wound up. Since high-viscosity dispersion adhesives are difficult to handle, they have to be pressed through a slot nozzle under high pressure and first pushed through a line system to the nozzle. The processing of a high-viscosity dispersion adhesive involves the generation of high pressures.
  • the invention makes use of the idea of applying a thickener and an adhesive dispersion to a textile carrier.
  • the thickener layer forms a buffer for the adhesive dispersion, so that the adhesive dispersion can only penetrate very little into the textile backing and, in particular, cannot penetrate it.
  • the side of the textile backing facing away from the application side remains completely dry, i.e. unharmed by both the (ASE -)thickener-water- Mixture and the adhesive dispersion. After the (ASE) thickener/water mixture and adhesive dispersion have dried, the adhesive tape can be wound up without any problems.
  • the (ASE) thickener/water mixture is applied over the entire surface of the textile backing. More preferably, the adhesive dispersion is also applied over the entire surface of the (ASE) thickener/water mixture that has been applied over the entire surface.
  • the method according to the invention can have several variants.
  • the (ASE) thickener/water mixture can be applied to the entire surface of the textile backing, while the adhesive dispersion is partially coated, in particular in one or more strips running in the machine direction.
  • the (ASE) thickener/water mixture can also be applied partially, in which case the adhesive dispersion is then only coated in areas in which the (ASE) thickener/water mixture has also been applied. More preferably, (ASE) thickener-water mixture and adhesive dispersion are applied in one or more strips running in the machine direction, the strips of (ASE) thickener-water mixture preferably having a greater width than the strips of adhesive dispersion.
  • a double slit nozzle is preferably used to apply the (ASE) thickener/water mixture and the adhesive dispersion; 300 ⁇ m and a length that corresponds to the width of the textile backing; lengths between 10 and 4000 mm, preferably between 1000 and 2000 mm, are used, but all other nozzle lengths are also conceivable.
  • the textile carrier is favorably guided around a casting roller and rests on the casting roller with a side facing away from the application side and is advanced by rotary movements of the casting roller.
  • a double-slot nozzle is preferably provided on the adhesive side of the textile backing, with the feed speed of the textile backing and a slot spacing of the double-slot nozzle being selected in such a way that the adhesive dispersion occurs only about one to 10 ms after the (ASE) thickener-water mixture has hit the textile carrier was applied, in turn is applied to the (ASE) thickener-water mixture.
  • the (ASE) thickener-water mixture prevents the adhesive dispersion from penetrating deep into the textile backing. Little penetration of the adhesive dispersion into the textile backing is desired, so that the dispersion adhesive and the textile backing form a firm bond with one another. After application, the adhesive and thickener are dried, resulting in a tacky tape that can be wound up.
  • a dispersion adhesive with a viscosity of 0.2 Pa*s to 30 Pa*s ⁇ 5 Pa*s, in particular 0.5 Pa*s to 15 Pa*s ⁇ 5 Pa*s, is advantageously used. More preferably, the viscosity of the dispersion adhesive is between 2 and 5 Pa*s. It is particularly advantageous if the (ASE) thickener/water mixture has a similar or particularly preferably a higher viscosity than the adhesive dispersion.
  • the viscosity measurement is carried out using an ARES rheometer (Rheometric Scientific) at room temperature and at a shear rate of 100 s -1 using a cone-plate system with a diameter of 50 mm.
  • a device for carrying out the method according to the invention comprises a casting shaft with a longitudinal direction of the casting shaft and a double slit nozzle with a longitudinal direction of the gap, which is arranged along the longitudinal direction of the casting shaft, preferably both longitudinal directions are arranged parallel to one another.
  • a first slot nozzle and a second slot nozzle are arranged on one side of a textile backing.
  • a free distance is provided between the double slot nozzle and the casting shaft, which forms a kind of gap through which a textile carrier can be advanced.
  • the textile support is deflected around the casting shaft and through the casting shaft or another Device provided with a feed.
  • a feed direction of the textile carrier is arranged transversely, preferably perpendicularly, to the longitudinal direction of the casting shaft and/or the double slit nozzle.
  • a first slot nozzle of the double slot nozzle is provided with a feed device with a (ASE) thickener/water mixture, the slot nozzle being in fluid communication with the feed device with the (ASE) thickener/water mixture.
  • the (ASE) thickener-water mixture is preferably provided in a reservoir and is conducted via a pipeline system, which is part of the supply device, to the first slotted nozzle and applied from there to a side of the textile backing facing away from the casting shaft.
  • a second slot nozzle of the double slot nozzle is connected to a second feed device with an aqueous adhesive dispersion.
  • the second slot nozzle is also part of the double slot nozzle and is in fluid communication with a reservoir for the adhesive dispersion via the second feed device.
  • the first slotted nozzle is arranged in front of the second slotted nozzle in the feed direction. This ensures that the thickener is first applied through the first slot nozzle to the side of the textile backing facing away from the casting shaft and the adhesive dispersion is then immediately applied through the second slot nozzle to the textile backing provided with the thickener.
  • a drying device for an adhesive tape is preferably provided in the feed direction after the double slit nozzle.
  • the drying device removes the water from the aqueous dispersion adhesive and thus dries the dispersion adhesive on the textile backing.
  • the method according to the invention serves in particular to produce an adhesive tape, in particular for wrapping cables, from a preferably textile backing and from a backing applied to at least one side of the backing Pressure-sensitive adhesive in the form of a dried polymer dispersion, the polymer being composed of:
  • the polymer consists of 95.0 to 99.5% by weight of n-butyl acrylate and/or 2-ethylhexyl acrylate and 0.5 to 5% by weight of an ethylenically unsaturated monomer having an acid or acid anhydride function, more preferably 98 .0 to 99.0% by weight of n-butyl acrylate and/or 2-ethylhexyl acrylate and 1.0 to 2.0% by weight of an ethylenically unsaturated monomer having an acid or acid anhydride function.
  • the tackifiers and/or additives mentioned further below can also be added to the pressure-sensitive adhesive, in addition to any residual monomers present, in the amounts likewise mentioned below.
  • the polymers of the pressure-sensitive adhesive consist only of the monomers (a) and (b) in the specified proportions.
  • n-butyl acrylate forms the monomer (a).
  • advantageous monomer (b) are acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid and/or maleic anhydride.
  • Preference is given to (meth)acrylic acid of the formula I, where R 3 H or CH 3 , the mixture of acrylic acid or methacrylic acid is preferably used if appropriate.
  • Acrylic acid is particularly preferred.
  • the polymer has the following composition:
  • the polymer dispersion is prepared by the process of emulsion polymerization of the components mentioned. 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 .
  • Adhesives comprising the polymer dispersion are preferably provided with a residual monomer content of less than or equal to 1% by weight, in particular less than or equal to 0.5% by weight (based on the mass of the dried polymer dispersion).
  • the dispersion adhesive of the adhesive dispersion is a pressure-sensitive adhesive, ie an adhesive that allows a permanent connection to almost all substrates even under relatively light pressure and can be detached from the substrate again after use essentially without leaving any residue.
  • a pressure-sensitive adhesive has a permanently tacky effect, ie it has a sufficiently low viscosity and high initial tack, so that it wets the surface of the particular substrate even with little contact pressure.
  • the ability of the dispersion adhesive to be bonded is based on its adhesive properties and its redetachability on its cohesive properties.
  • the dispersion adhesive In order to achieve pressure-sensitive adhesive properties, the dispersion adhesive must be above its glass transition temperature at the processing temperature in order to have viscoelastic properties. Since the cable harness is wound at normal ambient temperature (approximately between 15° C. and 25° C.), the glass transition temperature of the pressure-sensitive adhesive formulation is preferably below +15° C. (determined using DSC (Differential Scanning Calorimetry) in accordance with DIN 53 765 at a heating rate of 10 K /min). The glass transition temperature of the acrylate copolymers can be estimated from the glass transition temperatures of the homopolymers and their relative proportions according to Fox's equation.
  • the quantitative composition of the monomer mixture is advantageously selected in such a way that, according to an equation (G1) analogous to the Fox equation (cf. TG Fox, Bull. Am. Phys. Soc 1956, 1, 123) gives the desired Tc value for the polymer.
  • the polymers according to the invention have an adhesion to steel of at least 1.0 N/cm (at a basis weight of the dispersion adhesive of 30 g/m 2 on a 23 ⁇ m polyester film as carrier).
  • an “adhesive resin” is understood as meaning an oligomer or polymeric resin which increases the autoadhesion (the tack, the intrinsic tack) of the pressure-sensitive adhesive compared to the pressure-sensitive adhesive which does not contain any tackifier resin but is otherwise identical.
  • tackifiers to increase the bond strength of PSAs is known in principle. This effect also occurs when up to 15% by weight (corresponds to ⁇ 15 parts by weight) or 5 to 15% by weight of tackifier (based on the mass of the dried polymer dispersion) is added to the dispersion adhesive. Preference is given to adding 5 to 12% by weight, more preferably 6 to 10% by weight, of tackifier (based on the mass of the dried polymer dispersion).
  • all known classes of substances are suitable as tackifiers, which are also referred to as adhesive resins. Examples of tackifiers are hydrocarbon resins (e.g.
  • polymers based on unsaturated C5 or Cg monomers terpene-phenolic resins, polyterpene resins based on raw materials such as a- or ß-pinene, aromatic resins such as coumarone-indene resins or resins based on styrene or a-Methylstyrene such as rosin and its derivatives, for example disproportionated, dimerized or esterified rosin, for example reaction products with glycol, glycerol or pentaerythritol, to name just a few.
  • aromatic resins such as coumarone-indene resins or resins based on styrene or a-Methylstyrene such as rosin and its derivatives, for example disproportionated, dimerized or esterified rosin, for example reaction products with glycol, glycerol or pentaerythritol, to name just a few.
  • resins without easily oxidizable double bonds such as terpene-phenolic resins, aromatic resins and particularly preferably to resins which are produced by hydrogenation, such as, for example, hydrogenated aromatic resins, hydrogenated polycyclopentadiene resins, hydrogenated rosin derivatives or hydrogenated polyterpene resins.
  • 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 expediently used in dispersion form. In this way, they can be finely divided and mixed with the polymer dispersion without any problems.
  • the dispersion adhesive is diluted with a solvent for adhesive dispersion. Water is particularly preferred as the solvent.
  • the process of the invention can also be used to apply adhesives based on polyurethane dispersions.
  • adhesives based on polyurethane dispersions Other typical dispersion adhesives are described in Chapter 3.5 of the specialist book “Adhesive Bonding – Basics, Technologies, Applications” by G. Habenicht, 2009, Springer Verlag, Berlin/Heidelberg.
  • the proportions of thickener or rheological additives are in the range from 0.1 to 5% by weight, based on the mass of the dried polymer dispersion.
  • the organic thickeners are in turn split into two essential principles of action: (i) thickening of the aqueous phase, i.e. non-associating, and (ii) formation of associations between the thickener molecule and particles, sometimes involving the stabilizers (emulsifiers).
  • Representatives of the first (i) group of substances are water-soluble polyacrylic acids and polycoacrylic acids, which form polyelectrolytes with a large hydrodynamic volume in a basic medium.
  • ASE alkaline swellable emulsion
  • They are characterized by high resting shear viscosities and strong shear thinning.
  • Another class of substances are the modified polysaccharides, in particular cellulose ethers such as carboxymethyl cellulose, 2-hydroxyethyl cellulose, carboxymethyl-2-hydroxyethyl cellulose, methyl cellulose, 2-hydroxyethyl methyl cellulose, 2-hydroxyethyl ethyl cellulose, 2-hydroxypropyl cellulose, 2-hydroxypropyl methyl cellulose, 2-hydroxybutyl methyl cellulose.
  • This class of substances also includes less common polysaccharides such as starch derivatives and special polyethers.
  • the active group of (ii) associative thickeners are in principle block copolymers with a water-soluble middle block and hydrophobic end blocks, the end blocks interacting with the particles or themselves and thereby forming a spatial network including the particles.
  • Typical representatives are familiar to the person skilled in the art as HASE (hydrophobically modified alkali swellable emulsion), HEIIR (hydrophobically modified ethylene oxide urethane) or HMHEC (hydrophobically modified hydroxyethyl cellulose).
  • the middle block is an ASE
  • the end blocks are mostly long, hydrophobic alkyl chains coupled via polyethylene oxide bridges.
  • the water-soluble middle block is a polyurethane, with the HMHEC a 2-hydroxyethyl cellulose.
  • the non-ionic HEIIR and HMHEC are largely pH insensitive.
  • alkaline-activatable thickeners are commercially available and are described, for example, in the article by Charles Jones, Sylvie Doulut and Paul Reeve (Rohm & Haas Company) entitled “Developments in rheology modifiers suitable for use in surfactant-containing formulations” (October 2002).
  • the associative thickeners produce more or less Newtonian (shear rate-independent) or pseudoplastic (shear-thinning) flow behavior. Sometimes they also show a thixotropic character, which means that in addition to the shear force dependence of the viscosity, they also show a time dependence.
  • the inorganic thickeners are mostly phyllosilicates of natural or synthetic origin, examples are hectorites and smectites.
  • the individual layers separate from each other. Due to different charges on the surfaces and edges of the platelets, they form a space-filling house of cards structure at rest, which results in high shear viscosities at rest up to yield points. In shear, the house of cards structure collapses and a significant drop in shear viscosity is observed.
  • concentration and geometric dimensions of the flakes the structure can take some time to build up, so that thixotropy can also be achieved with such inorganic thickeners.
  • Sheet silicates or sheet or phyllosilicates are known as ion exchangers.
  • Known phyllosilicates are clay minerals such as montmorillonite, nontronite, hectorite, saponite, sauconite, beidellite, allevardite, lllite, halloysite, attapulgite and/or sepiolite, as well as disteardimonium hectorite.
  • Modified three-layer phyllosilicates or modified three-layer clay minerals used synonymously here, such as, for example, illite, smectite or vermiculite, are preferred according to the invention. Particular preference is given to using the following modified sheet silicates, montmorillonite, hectorite or smectite, in the pressure-sensitive adhesives of the invention.
  • the unmodified phyllosilicates can be activated with polar additives and high shearing forces to develop their full effectiveness (e.g. product information on Tixogel ® VP-V (Quaternium-90 Bentonite) from Rockwood Additives Ltd. or on Bentone® 38 (organic derivative a magnesium sheet silicate (hectorite)) from Rheox Inc.
  • modified phyllosilicates can also be used under the names Laponite®, Optigel®, Laponite SL 25®, Laptonite S482®, Laptonite EP®, Laptonite RDS®, Optigel CK® from Rockwood.
  • the natural and synthetic organically surface-modified three-layer phyllosilicates are preferred.
  • Laptonites are colloidal, synthetic sheet silicates (hectorites, with lithium) whose platelet diameter is between 20 and 30 nm, preferably around 25 nm, and whose thickness is approximately 1 nm. Due to the small size of the laminae, the house of cards structure can be rebuilt very quickly, in which the edges of one lamina rest on the surface of an adjacent layered silicate lamina.
  • the three-layer silicates can easily be stirred into water and form a clear, colorless dispersion. They can form a gel (high viscosity colloidal dispersion) or a sol (low viscosity colloidal dispersion).
  • Non-associating thickeners namely ASE thickeners
  • the adhesive dispersion also contains a thickener, this can be either a non-associative or an associative thickener.
  • thickeners can be stirred directly into the adhesive dispersion or some are advantageously prediluted or predispersed in water beforehand.
  • All known textile backings such as knitted fabrics, non-crimp fabrics, tapes, braids, tufted textiles, felts, woven fabrics (including plain, twill and satin weave), knitted fabrics (including warp-knitted fabrics and knitted fabrics) or fleeces can be used as the backing material for the adhesive tape, with “fleece “ at least textile fabrics according to EN 29092 (1988) as well as stitch-bonded nonwovens and similar systems are to be understood.
  • Spacer fabrics and knitted fabrics with lamination can also be used.
  • Spacer fabrics are disclosed in EP 0 071 212 B1.
  • Spacer fabrics are mat-shaped composites with a cover layer made of a fiber or filament fleece and a base layer and between these layers there are individual or tufts of retaining fibers which are distributed over the surface of the composite and needled through the particle layer and connect the cover layer and the base layer to one another.
  • particles of inert rock, such as sand, gravel or the like, are present in the holding fibers as an additional but not required feature.
  • the tether fibers needled through the particulate layer space the topsheet and backsheet from each other and are bonded to the topsheet and backsheet.
  • Nonwovens that can be used are particularly bonded staple fiber nonwovens, but also filament, meltblown and spunbonded nonwovens, which usually need to be additionally bonded.
  • Mechanical, thermal and chemical bonding are known as possible bonding methods for nonwovens. If the fibers are held together mechanically during mechanical strengthening, mostly by swirling the individual fibers, by intermeshing fiber bundles or by sewing in additional threads, then both thermal and chemical processes can be used to create adhesive (with binder) or cohesive (binder-free) fiber-fiber -Achieve ties. With suitable formulation and process control, these can be exclusively or at least mainly limited to fiber nodes, so that a stable, three-dimensional network is formed while maintaining the loose, open structure in the fleece.
  • Fleeces have proven to be particularly advantageous which are strengthened in particular by overstitching with separate threads or by intermeshing.
  • Such consolidated webs are produced, for example, on stitch-bonding machines of the “Malimo” type from Karl Mayer, formerly Malimo, and can be obtained from Techtex GmbH, among others.
  • a Malivlies is characterized in that a cross-fiber web is strengthened by the formation of meshes from fibers of the web.
  • a fleece of the Kunit or Multiknit type can also be used as a carrier.
  • a kunit fleece is characterized in that it results from the processing of a longitudinally oriented fiber fleece into a fabric that has stitches on one side and mesh webs or pile fiber folds on the other side, but has neither threads nor prefabricated fabrics.
  • Such a nonwoven has also been produced for a long time, for example on "Malimo" stitch-bonding machines from the Karl Mayer company.
  • Another characteristic feature of this nonwoven is that, as a longitudinal fiber nonwoven, it can absorb high tensile forces in the longitudinal direction characterized in that the non-woven is strengthened both on the top and on the underside by being pierced with needles on both sides.
  • the starting product for a multiknit is usually one or two pile fiber non-woven fabrics that are meshed on one side and manufactured according to the Kunit process.
  • both upper sides of the non-woven fabric are formed into a closed surface by fiber meshing and are connected to one another by nearly vertical fibers.
  • a stitchbonded nonwoven is formed from a nonwoven material with a large number of seams running parallel to one another. These seams are created by sewing or stitch-bonding continuous textile threads.
  • stitch-bonding machines of the "Malimo" type from the Karl Mayer company are known, the fleece itself is called Maliwatt. Needle mats are also particularly suitable. In needlepunch, a batt is formed into a fabric with the help of barbed needles. The material is solidified on a needle bar by alternately piercing and pulling out the needles, whereby the individual fibers intertwine to form a solid fabric.
  • the number and design of the needling points determine the strength and stability of the fiber structure, which is usually light, air-permeable and elastic.
  • a staple fiber web that is pre-consolidated in the first step by mechanical processing or that is a wet web that has been laid hydrodynamically, with between 2% by weight and 50% by weight of the fibers of the web being melt fibers, in particular between 5 % and 40% by weight of the fibers of the web.
  • Such a fleece is characterized in that the fibers are laid wet or, for example, a staple fiber fleece is pre-consolidated by the formation of meshes from fibers of the fleece by needling, sewing, air and/or water jet processing.
  • the carrier can be calendered in a rolling mill for compaction.
  • the two rollers preferably run in opposite directions and at the same peripheral speed, so that the carrier is pressed and compacted.
  • the carrier is additionally ground smooth.
  • the backing is preferably a fabric, more preferably a polyester fabric.
  • Particularly preferred fabrics are constructed as follows:
  • the thread count in the warp is 10 to 60/cm.
  • the thread count in the weft is 10 to 40/cm.
  • the warp threads have a yarn weight between 40 and 400 dtex, in particular between 44 and 330 dtex, particularly preferably 167 dtex.
  • the weft threads have a yarn weight between 40 and 660 dtex, in particular between 44 and 400 dtex, particularly preferably 167 dtex.
  • the number of threads in the warp is 40 to 50/cm, preferably 44/cm.
  • the number of threads in the weft is 18 to 22/cm, preferably 20/cm.
  • the fabric is a polyester fabric.
  • Other possibilities are polyamide fabrics, viscose fabrics and/or blended fabrics made from the materials mentioned.
  • the thickness of the fabric is at most 300 ⁇ m, particularly preferably 170 to 230 ⁇ m, very particularly preferably 190 to 210 ⁇ m.
  • the backing has a basis weight of up to 200 g/m 2 , preferably 100 to 150 g/m 2 .
  • Starting materials for the carrier material for the adhesive tape are, in particular, (chemical) fibers (staple fibers or continuous filaments) made from synthetic polymers, also known as synthetic fibers, made from polyester, polyamide, polyimide, aramid, polyolefin, polyacrylonitrile or glass, (chemical) fibers made from natural polymers such as cellulosic fibers (viscose, modal, lyocell, cupro, acetate, triacetate, cellulon), such as rubber fibers, such as plant protein fibers and/or animal protein fibers and/or natural fibers made from cotton, sisal, flax, silk, hemp, linen, coconut or wool intended.
  • the present invention is not limited to the materials mentioned, but a large number of other fibers can be used to produce the carrier, as will be apparent to those skilled in the art without having to be inventive.
  • yarns made from the specified fibers are also suitable.
  • individual threads can be made from a mixed yarn, i.e. they can have synthetic and natural components.
  • the warp threads and the weft threads are each of a single type.
  • the warp threads and/or the weft threads can each consist only of synthetic threads or only of threads made from natural raw materials, ie they can be of the same type.
  • the yarns or threads of the fabrics can be in the form of filaments.
  • a filament is understood to mean a bundle of parallel, straight individual fibers/individual filaments, also often referred to as a multifilament in the literature. If necessary, this bundle of fibers can be strengthened by twisting, in which case one speaks of spun or twisted filaments. Alternatively, the fiber bundle can be solidified by swirling it with compressed air or a water jet. In the following, only the term filament is used in general for all of these embodiments.
  • the filament can be textured or smooth and point bonded or unbonded.
  • adheresive tape includes all flat structures such as films or film sections extended in two dimensions, tapes with extended length and limited width, tape sections and the like, ultimately also diecuts or labels.
  • the adhesive tape thus has a longitudinal extension and a width extension.
  • the adhesive tape also has a thickness perpendicular to both dimensions, with the width dimension and length dimension being many times greater than the thickness.
  • the thickness is as uniform as possible, preferably exactly the same, over the entire surface area of the adhesive tape, which is determined by length and width.
  • the adhesive tape is in particular in web form.
  • a web is understood to mean an object whose length is many times greater than the width, and the width along the entire length is preferably designed to be approximately constant.
  • 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.
  • a backing lacquer can be applied to the back of the adhesive tape in order to favorably influence the unrolling properties of the adhesive tape wound into the Archimedean spiral.
  • This backside coating can be used with silicone or fluorosilicone compounds and also be equipped with polyvinylstearylcarbamate, polyethyleneiminestearylcarbamide or fluoro-organic compounds as adhesive substances.
  • the dispersion adhesive can be applied in the longitudinal direction of the adhesive tape in the form of a strip that is narrower than the backing of the adhesive tape.
  • the position of the strip on the carrier can be freely selected, with an arrangement directly on one of the edges of the carrier being preferred.
  • the dispersion adhesive is preferably applied over the entire surface of the carrier.
  • At least one strip of covering can be provided on the adhesive coating of the carrier, which strip extends in the longitudinal direction of the adhesive tape and which covers between 20% and 90% of the adhesive coating.
  • the strip covers between 50% and 80% of the total adhesive coating.
  • the degree of coverage is chosen depending on the application and the diameter of the cable set.
  • the percentages given refer to the width of the flashing strips in relation to the width of the backing.
  • FIG. 1 shows a sectional view of an apparatus for carrying out the adhesive tape production method according to the invention and
  • a device for applying a layer of adhesive 8 to a textile backing 2 is shown schematically in a sectional view.
  • the device comprises a casting shaft 3, via which the textile support 2 is deflected.
  • the casting shaft 3 is connected to a motor which rotates the casting shaft 3 and feeds the textile carrier 2 in a feed direction V.
  • the direction of rotation is changeable.
  • a double slit nozzle 4 is formed next to the casting shaft 3 .
  • the casting shaft 3 and the double slit nozzle 4 have the same longitudinal extent in their longitudinal direction L, which is perpendicular to the plane of the drawing.
  • the double slit nozzle 4 here has a longitudinal extension of its two gaps of equal length of 1600 mm. Of course, other lengths are also possible.
  • the double slit nozzle 4 and the casting shaft 3 are arranged parallel to one another. They are spaced apart from one another and form a gap 6 of constant width between them, through which the textile backing 2 is passed.
  • the textile carrier 2 is pulled through the gap 6 and deflected around the casting shaft 3, from bottom to top right in FIG.
  • an (ASE) thickener-water mixture 7 is first applied through a first slot nozzle 7a to a side of the textile carrier 2 facing away from the casting shaft 3 .
  • the (ASE) thickener-water mixture 7 was previously prepared in a stirred tank. There is an excess of water, so that the thickener is saturated and can no longer bind any more water.
  • the first slit nozzle 7a has a height of about 100 ⁇ m, preferably exactly 100 ⁇ m.
  • the first slot nozzle 7a has a length of 1600 mm.
  • a second slit nozzle 8a arranged downstream in the feed direction V of the textile backing 2 enables an adhesive dispersion 8 to be applied to the thickener 7, which was applied to an adhesive side 2a of the textile backing 2.
  • the second slot nozzle 8a also has a length of 1600 mm and a height of 300 ⁇ m.
  • the (ASE) thickener/water mixture 7 is applied to the textile backing 2 in the form of a thickener layer, and the adhesive dispersion 8 is applied to the textile backing 2 in the form of a dispersion adhesive layer.
  • An acrylate adhesive which is diluted with water is applied as the adhesive dispersion 8.
  • the adhesive dispersion 8 is applied with an application rate of 70 g/m 2 .
  • a PET fleece is used as the textile carrier 2 .
  • the (ASE) thickener/water mixture 7 was layered onto the PET fleece with an application weight of 2 g/m 2 .
  • Sera Print M-PHC was used as a thickener.
  • the (ASE) thickener-water mixture 7 initially sinks into the textile carrier 2 immediately during coating.
  • a drying device is arranged, which is not shown here, which dries the applied layer of adhesive 8 and the thickener layer 7 and makes the finished adhesive tape 1 available.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

L'invention concerne un procédé pour produire un ruban adhésif, comprenant les étapes qui consistent à : a) mélanger un épaississant ASE avec de l'eau et produire un mélange épaississant ASE-eau (7) ; b) produire une dispersion adhésive (8) à partir d'un adhésif et d'un solvant ; c) fournir un substrat textile (2) ; d) appliquer le mélange épaississant ASE-eau (7) sur le substrat textile ; e) appliquer la dispersion adhésive (8) sur le mélange épaississant ASE-eau (7) pour obtenir le ruban adhésif ; f) faire sécher le ruban adhésif obtenu, l'épaississant, en particulier l'épaississant ASE, étant saturé en eau et la dispersion adhésive (8) étant appliquée après ou simultanément à l'application du mélange épaississant ASE-eau (7). Ce procédé permet d'obtenir un ruban adhésif (1) qui nécessite une quantité d'adhésif inférieure à celle des rubans adhésifs classiques pour des propriétés adhésives identiques.
EP21840018.2A 2020-12-22 2021-12-20 Procédé de production d'un ruban adhésif Pending EP4267688A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020216457 2020-12-22
PCT/EP2021/086700 WO2022136218A1 (fr) 2020-12-22 2021-12-20 Procédé de production d'un ruban adhésif

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EP (1) EP4267688A1 (fr)
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WO (1) WO2022136218A1 (fr)

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Publication number Priority date Publication date Assignee Title
IL66103A0 (en) 1981-07-27 1982-09-30 Tesch G H Mat shaped composite body and its preparation
DE10229733A1 (de) 2002-07-02 2004-01-22 Basf Ag Haftklebstoffe für Träger aus Weich-PVC
DE102011075160A1 (de) 2011-05-03 2012-11-08 Tesa Se Verfahren zur Herstellung eines Klebebandes insbesondere zum Umwickeln von Kabeln aus einem offenen textilen Träger und einer darauf einseitig beschichteten Haftklebemasse
EP2695926A1 (fr) 2012-08-07 2014-02-12 tesa SE Ruban adhésif réticulé par rayons électroniques destinée à l'enrobage de cables et utilisation pour l'enrobage
DE102017219658A1 (de) 2017-11-06 2019-05-09 Tesa Se Verfahren zur Herstellung eines Klebebandes

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US12221566B2 (en) 2025-02-11
WO2022136218A1 (fr) 2022-06-30

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