CN115362232A - Adhesive tape, in particular cable-winding tape for winding cables in motor vehicles - Google Patents
Adhesive tape, in particular cable-winding tape for winding cables in motor vehicles Download PDFInfo
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- CN115362232A CN115362232A CN202180026108.6A CN202180026108A CN115362232A CN 115362232 A CN115362232 A CN 115362232A CN 202180026108 A CN202180026108 A CN 202180026108A CN 115362232 A CN115362232 A CN 115362232A
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- adhesive
- adhesive tape
- coating
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- carbon nanotubes
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- 239000002390 adhesive tape Substances 0.000 title claims abstract description 41
- 238000004804 winding Methods 0.000 title description 12
- 238000000576 coating method Methods 0.000 claims abstract description 54
- 239000011248 coating agent Substances 0.000 claims abstract description 53
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 49
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 48
- 239000000853 adhesive Substances 0.000 claims abstract description 42
- 230000001070 adhesive effect Effects 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 13
- 239000004753 textile Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000006185 dispersion Substances 0.000 claims description 8
- 239000004831 Hot glue Substances 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 4
- 239000000470 constituent Substances 0.000 claims description 3
- 238000007766 curtain coating Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 31
- 239000011230 binding agent Substances 0.000 description 11
- 230000005670 electromagnetic radiation Effects 0.000 description 11
- 239000000969 carrier Substances 0.000 description 10
- 239000002759 woven fabric Substances 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 7
- 239000004033 plastic Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004821 Contact adhesive Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002109 single walled nanotube Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- C09J7/29—Laminated material
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/314—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive layer and/or the carrier being conductive
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/41—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the carrier layer
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
Abstract
Adhesive tape, in particular a cable-wrapping tape for wrapping cables in motor vehicles, having a carrier (2, 3) and having an adhesive coating (4) on at least one side of the carrier (2, 3), characterized in that the adhesive coating (4) is provided with embedded carbon nanotubes.
Description
Technical Field
The invention relates to an adhesive tape, in particular a cable-wrapping tape for wrapping cables in motor vehicles, having a carrier and having an adhesive layer on at least one side of the carrier.
Adhesive tapes, in particular cable-winding tapes for winding cables in motor vehicles, have to meet very different requirements. In addition to simple processing and the hand-tear properties associated therewith, resistance to chemicals such as oil and gasoline is often required. Furthermore, such tapes must be able to withstand elevated temperatures that must reach 125 ℃ or more. In addition, wear resistance and good noise reduction properties are also important.
In addition to these requirements, other properties are now required for such tapes, in particular for cable-wrapping tapes. These are exhibited particularly in hybrid and electric vehicles, and due to the large current flowing in this case, a plurality of 100A's are sometimes generated in a voltage range of up to 400V and in a strong alternating magnetic field range of 800V. These not only generate interference currents in the vehicle electronics, but in principle they are also possible sources of interference to the human body. To date there is no relevant standard and no reliable solution. Attempts have been made to provide at least partial electromagnetic shielding in the interior of motor vehicles, for example by means of shielding plates, which, however, are generally inadequate.
Background
For example, US 4 327 246 relates to an adhesive tape which is helically wound around a cable to provide electrical shielding. For this purpose, the known adhesive tape has, in particular, an embedded film layer made of an electrically conductive material, such as copper, aluminum or silver. In fact, one or more membrane strips are realized in this way. However, the actual application of such tapes is both cumbersome and expensive.
A similar adhesive tape is provided in WO 03/054438 A1. However, the problem of possible shielding against electromagnetic radiation is not considered.
The prior art has generally demonstrated that when it concerns the use of adhesive tapes, in particular cable-winding tapes for winding cables in automobiles, the wound cables are particularly mechanically protected and mass-produced by means of the adhesive tapes. Furthermore, the method of US 4 327 256 may already be used to achieve additional electromagnetic shielding. However, the detailed structure of the known adhesive tape is complicated. Furthermore, the production costs are high, so that this embodiment has hitherto been of little or no practical use. The invention thus aims to solve the problem as a whole.
Disclosure of Invention
The invention is based on the technical problem of further developing such an adhesive tape, in particular a cable-wrapping tape for wrapping cables in automobiles, in such a way that, in addition to the general requirements of the field of application, an electromagnetic shielding is provided and a reduced manufacturing cost compared to the prior art is taken into account.
In order to solve this technical problem, in the context of the present invention, such an adhesive tape, in particular a cable-winding tape for winding cables in automobiles, is characterized in that the adhesive coating is provided with embedded carbon nanotubes.
According to an advantageous embodiment, wherein the carbon nanotubes in the adhesive coating are present in a concentration of at least 0.01 wt.%. The concentration of carbon nanotubes in the binder coating is up to a maximum of 30 wt.%. It is preferred to observe here a concentration of carbon nanotubes in the bond coat of 0.01 to 10% by weight. It is very particularly preferred that the grammage of the carbon nanotubes in the adhesive coating is in the range from 0.01% to 5% by weight, wherein the above-given explanations are in each case based on the mass of the adhesive coating.
In the prior art according to EP 2 079 B1, although solutions have been proposed in which the adhesive tape used as a packaging adhesive tape has a carrier which has carbon nanotubes in at least one of its carrier films. A high modulus value, for example a specific stress at 10 wt.% elongation, should therefore be observed in the machine direction in the case of the known packaging tape. This means that the known teachings for packaging tapes are limited to mechanically reinforcing the carrier or the corresponding carrier film by means of carbon nanotubes. The problem of electromagnetic resistance is rather irrelevant.
However, within the scope of the present invention, it has been found that even a relatively low concentration of carbon nanotubes in the binder coating is sufficient to achieve a significant shielding of electromagnetic radiation. In this connection, an attenuation of the electromagnetic radiation in the relevant frequency range from about 100MHz to about 10GHz is actually observed, which is generally higher than 5dB, mostly even more than 10dB and preferably more than 20dB and more. Often even 30dB and more attenuation of electromagnetic radiation is achieved. The frequency range in question from about 100MHz to about 10GHz is relevant in this respect, for example the standard DIN EN 50147-1 96 is relevant here for shielding attenuation and is based on the electromagnetic compatibility test (EMV). According to the only exemplary description in DE 10 2017 603 A1, this is directed to a shielding element for an electrical or electronic functional element. The shielding element discussed herein is used in vehicles to discharge charge and/or attenuate electromagnetic fields according to the criteria discussed above.
The carbon nanotubes used according to the invention are tubes with a diameter of typically less than 100 nm. Typically, the diameter of the carbon nanotubes in question is observed at this point to be a few nanometers. The term nanotube also means that the length of the tubes exceeds their diameter. In this regard, lengths of several micrometers are typical. Thus, the carbon nanotubes in question are usually provided in powder form. The carbon nanotubes present in powder form can thus be readily present as a constituent of the processing material for the adhesive coating. As a result, the processing is simplified and the manufacturing cost can be significantly reduced.
Carbon nanotubes or CNTs (carbon nanotubes) are usually produced by laser ablation of graphite, by arc discharge between carbon electrodes or in connection therewith by Chemical Vapor Deposition (CVD). The individual carbon nanotubes can be of single-walled or multi-walled design. The walls of which are each composed of carbon, the carbon atoms forming a 6-cornered honeycomb structure.
In addition to the aforementioned electromagnetic shielding properties, the carbon nanotubes have excellent mechanical properties. This is because their density is usually 1.3g/cm 3 To 1.4g/cm 3 Within the range of (1). Furthermore, they typically have a tensile strength of 30GPa for single-walled carbon nanotubes, which may be increased to 63GPa for multi-walled implementations. In contrast, the density of the steel is about 7.85g/cm 3 And has a maximum tensile strength of 2GPa.
In any case, within the scope of the invention, the adhesive tape is provided in such a way that a significant shielding against electromagnetic radiation is ensured by the carbon nanotubes embedded in the adhesive coating. Thus, any electromagnetic induction in the control instruments or other electronic components, in particular in the motor vehicle, is prevented or at least reduced and, furthermore, any health hazard to the operator within the motor vehicle is minimized. The shielding or attenuation of electromagnetic radiation is here mainly effective in the relevant frequency range from about 100MHz to about 10Hz, so that the adhesive tape in question is particularly suitable for applications in connection with hybrid or electric vehicles. This is where the main advantage can be seen.
The processing mass for producing the adhesive coating with the powder from the carbon nanotubes dispersed therein can be designed, for example, as an extrusion mass for applying a hotmelt adhesive as an adhesive coating. In this case, the hotmelt adhesive can be, for example, an acrylic-based adhesive, which is prepared according to the invention from the extrusion mass in question with embedded carbon nanotubes in powder form and applied to the support.
In this case, the processing material can be applied to the support in the form of a hot-melt adhesive for producing the adhesive coating. In this connection, conventional spray nozzles are mostly used for applying the hotmelt adhesive or hotmelt adhesive material as a hotmelt to the support. Alternatively or additionally, a non-contact adhesive coating can also be considered in this case. In this case, for example, the adhesive is applied to the support during a pressureless coating process (for example the so-called "curtain coating process"). Where a film of the enclosed adhesive material falls onto the substrate. In this way, an adhesive coating of uniform thickness and thus uniform grammage is achieved overall. Alternatively or additionally, the adhesive mass is applied to the support by means of a transfer coating, which also applies.
However, the processing material can also be applied to the support in the form of an application solution or dispersion for the preparation of the adhesive coating. In this case, the carbon nanotubes are again dispersed in powder form in the application solution or dispersion and applied to the support together with the application solution or dispersion. The application solution may be, for example, a known binder containing a dispersant and a solvent, such as an acrylate dispersion and the like.
In this case, the application can be carried out by means of a doctor blade or a similar brush application (strichaufrag), roller application (Walzenauftrag) or roller application (rollennauftrag) or during spraying (spranhauftrag). As possible solvents, in addition to water in principle, the use of organic solvents such as alcohols and in particular ethanol, propanol, ethylene glycol and the like is typically considered. Toluene or, for example, ethyl acetate are likewise suitable.
In principle, the invention also independently comprises the use of a rubber mass with embedded carbon nanotubes as an adhesive coating, which is additionally crosslinked. The rubber material can be applied to the support as a dispersion, a hot melt or a polymer melt. The rubber compounds are then crosslinked, usually by means of electron beams and/or UV light. The application of the adhesive coating as a polymer mass and its subsequent crosslinking is of course possible in principle also in the case of adhesives which are not based on rubber masses.
The carbon nanotubes are usually present in the process material for producing the adhesive coating in a concentration of 0.01% to 30% by weight, based on the process material. The desired concentration of carbon nanotubes in the binder coating is also provided overall. Furthermore, the adhesive coating can in principle be a strip coating. However, the present invention also uses a full-surface coating as the adhesive coating, alternatively or additionally.
In this context, all variants are possible as carriers which can be considered, for example film carriers, paper carriers, felt carriers, multilayer carriers, etc. A particularly preferred variant is one in which the support is provided in whole or in part with at least one textile support layer. Such textile carrier layers are particularly suitable for the described field of use as cable-winding tapes for winding cables in automobiles, since they can be produced inexpensively on the one hand and provide the required flexibility and abrasion resistance associated with significant noise reduction on the other hand.
The support therefore advantageously has, in whole or in part, at least one textile support layer. The woven support layer can be made of woven (Gewebe), non-woven (Vlies), knitted (Gewirk), scrim (Gelege), velour (Velours) alone or in combination. As a further option, the carriers of the present design are provided with carbon nanotubes embedded in or applied to them in addition to the adhesive coating.
This is particularly advantageous in achieving a woven carrier layer. This is because woven carrier layers are usually constructed from plastic fibers, which are usually used. In the production of plastic fibers, carbon nanotubes in powder form can in turn be mixed into the extrusion material for the production of these textile plastic fibers. For example, the nonwoven fabric carrier may be prepared from plastic fibers. Furthermore, it is possible to process plastic fibers in a woven fabric or to realize and implement other variants, such as knits, scrims or even velours, alone or in combination, for the woven carrier layer. In this case, the insertion of the carbon nanotubes is also particularly easy and inexpensive, since they are mixed in powder form or as a dispersion into the processing or extrusion materials used for the production of the plastic fibers or plastic threads, from which the textile support layer in question is further produced.
In principle, the carrier can also be formed as a multilayer carrier from a textile carrier layer and additionally at least one further layer. The further layer may be a film layer and/or a foam layer. Alternative to a woven carrier layer, the film layer or the foam layer can also be provided with carbon nanotubes. In this case, the carbon nanotubes are again mixed in powder form into the processing or extrusion material used for producing the film or foam layer. The processing material may typically be polymer particles.
As a result, an adhesive tape is provided which is used above all in or on motor vehicles, in particular, and in which it serves as a cable-wrapping tape for wrapping cables. For this purpose, the known adhesive tapes are not only designed to be durable and usually hand-tearable, but also to prevent any rattling. Of particular importance is the property according to the invention that a significant attenuation of electromagnetic radiation can be ensured. This is ensured by the embedded carbon nanotubes.
If the support with the woven support layer is designed as such in the form of a woven fabric or also as a multilayer support, a typical abrasion resistance according to standard LV 312 (standard 10/2009) of at least class B or class C can also be achieved. This applies in particular when a particular woven fabric is used as the textile carrier layer or in this context weft threads which are thicker than the relevant warp threads are used. Of all these, the preparation is particularly simple and inexpensive, since the carbon nanotubes are added in powder form to the processing material for the adhesive coating. This is where the main advantage can be seen.
Drawings
The invention is explained in more detail below with reference to the drawings, which represent only exemplary embodiments; the display is as follows:
figure 1 shows in schematic longitudinal section an adhesive tape used according to the invention,
fig. 2A and 2B show tapes and
fig. 3 relates to the achieved attenuation of electromagnetic radiation in the frequency range between 100MHz and 10 GHz.
The figure shows an adhesive tape for the cable 1. In the exemplary embodiment, and without limitation, cable 1 is a cable 1 that is a component of a cable harness in an automobile. As shown in principle in fig. 2B, the tape discussed herein may surround the cable 1 as a longitudinal sheath. However, the adhesive tape is usually wound helically around the cable 1 in question, as can be appreciated from fig. 2A.
As shown in the sectional view of fig. 1, the adhesive tape has carriers 2,3, which are configured in multiple layers according to an exemplary embodiment. In fact, the supports 2,3 are provided, in whole or in part, with at least one textile carrier layer 2. The textile carrier layer 2 is a woven fabric composed of warp threads 2a extending in the longitudinal direction and weft threads 2b extending in the transverse direction.
In addition to the woven carrier layer 2, the known carriers 2,3 are also provided with a film layer 3 according to an exemplary embodiment. The film layer 3 is additionally provided with an adhesive coating 4 on its outwardly facing surface. The adhesive layer 4 is applied to the film layer 3 over the entire area or in partial areas. In principle, however, the adhesive layer 4 can also be applied directly to the textile carrier layer 2.
Instead of the woven fabric shown as the woven carrier layer 2, it is of course also possible here to use nonwoven fabrics, knitted fabrics, scrims or velours, alone or in combination. The invention also includes variants in which the textile support layer 2 is formed from two woven fabrics, a woven fabric and a nonwoven fabric, a woven fabric and a velvet, etc., which are connected to one another. However, this is not shown in detail.
Within the scope of the present invention is,the adhesive coating 4 is provided with embedded carbon nanotubes. The carbon nanotubes are present in the binder coating 4 in a concentration of typically more than 0.01% by weight. The concentration of carbon nanotubes in the binder coating 4 is a maximum of 30% by weight, based in each case on the mass of the binder coating 4. According to an exemplary embodiment, having a density of 150g/m 2 Is applied to the film layer 3.
In the exemplary embodiment, the carbon nanotubes are present in powder form and present as a constituent of the process mass for the binder coating 4. The processing mass is in particular an extrusion mass, by means of which the adhesive coating 4 is applied to the carriers 2,3, according to an exemplary embodiment, the extrusion mass being used here for applying the hot-melt adhesive as the adhesive coating 4, which is of course only by way of example and should not be understood as limiting.
The cross-sectional view according to fig. 1 shows that the warp threads 2a and the weft threads 2b of the woven carrier layer 2 have the same thread fineness. In principle, however, it is also possible to use weft threads 2b which are designed to be considerably thicker than warp threads 2 a. The abrasion resistance of the adhesive tape can be improved as required. In addition to the adhesive layer 4, the carriers 2,3 can also be provided here with embedded carbon nanotubes to achieve electromagnetic shielding. However, this is to be understood as an alternative. In general, it is sufficient if the adhesive coating 4 of the adhesive tape shown is provided with embedded carbon nanotubes.
From fig. 3, one can now understand the effect achieved by means of the adhesive tape according to the invention in shielding electromagnetic radiation. In fact, fig. 3 only shows the shielding effect of the adhesive coating 4. As previously mentioned, the glue line 4 has a basis weight of 150g/m 2 This sets up different grammage or concentration of the carbon nanotubes, which is reflected in the three curves shown in fig. 3.
In fact, the curve shown by the solid line corresponds to a concentration of 4.1 wt.% of carbon nanotubes in the binder coating 4, while a further variant with a dashed line is provided with a grammage of 7.5 wt.% based on the mass of the binder coating 4. Finally, the curve shown by the line points relates to the grammage or concentration of 10.5 wt% carbon nanotubes.
It can be seen that even with a minimum concentration of 4.1 wt.% of carbon nanotubes in the adhesive coating 4, the attenuation of electromagnetic radiation in the relevant frequency range from about 100MHz to about 10GHz has consistently reached more than 30dB. This attenuation can be increased with increasing concentration of carbon nanotubes to values of almost 50dB or even higher taking into account the third embodiment of 10.5 wt%. It is thus clear that with increasing concentration of carbon nanotubes in the binder coating 4, the attenuation effect on electromagnetic radiation increases in the frequency range considered from 100Hz to 10 GHz.
Claims (15)
1. Adhesive tape, in particular a cable-wrapping tape for wrapping cables in motor vehicles, having a carrier (2, 3) and having an adhesive coating (4) on at least one side of the carrier (2, 3), characterized in that the adhesive coating (4) is provided with embedded carbon nanotubes.
2. Adhesive tape according to claim 1, characterized in that the carbon nanotubes in the adhesive coating (4) are present in a concentration of 0.01 to 30 wt. -%, preferably 0.01 to 10 wt. -%, particularly preferably 0.01 to 5 wt. -%, each based on the mass of the adhesive coating (4).
3. Adhesive tape according to claim 1 or 2, characterized in that the carbon nanotubes are present in powder form and are a constituent of the processing mass for the adhesive coating (4).
4. Adhesive tape according to claim 3, characterized in that the process material for preparing the adhesive coating (4) is applied in the form of a hot-melt adhesive.
5. Adhesive tape according to any of claims 1 to 4, characterised in that the adhesive mass is applied to the carrier (2, 3) by means of a nozzle and/or a curtain coating process and/or a transfer coating.
6. Adhesive tape according to any of claims 3 to 5, characterized in that the process material for preparing the adhesive coating (4) is applied in the form of a dispersion or solution.
7. Adhesive tape according to claim 6, characterised in that the application of the dispersion or solution is carried out by means of a doctor blade or similar brush application, roller application or in a spraying process.
8. Adhesive tape according to any of claims 1 to 7, characterized in that the carbon nanotubes are present in the processing mass in a concentration of 0.01-30% by weight.
9. Adhesive tape according to any of claims 1 to 8, characterized in that the adhesive coating (4) is configured as a strip coating.
10. Adhesive tape according to any of claims 1 to 9, characterized in that the adhesive coating (4) is configured as a full-surface coating.
11. Adhesive tape according to any of claims 1 to 10, characterized in that the carrier (2, 3) has, in whole or in part, at least one textile carrier layer (2).
12. Adhesive tape according to claim 11, characterized in that the woven carrier layer (2) consists of woven, non-woven, knitted, scrim, velour.
13. Adhesive tape according to any of claims 1 to 12, characterized in that the carrier (2, 3) is equipped with carbon nanotubes embedded in or applied to it.
14. Adhesive tape according to any of claims 1 to 13, characterized in that the carrier (2, 3) is constructed as a multilayer carrier, which is composed of a textile carrier layer (2) and additionally at least one further layer (3).
15. Adhesive tape according to claim 14, characterized in that the further layer (3) is configured as a film layer (3) and/or a foam layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202020101775.6U DE202020101775U1 (en) | 2020-04-01 | 2020-04-01 | Adhesive tape, in particular cable winding tape for wrapping cables in automobiles |
| DE202020101775.6 | 2020-04-01 | ||
| PCT/EP2021/055870 WO2021197772A1 (en) | 2020-04-01 | 2021-03-09 | Adhesive tape, in particular cable wrapping tape for wrapping cables in automobiles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115362232A true CN115362232A (en) | 2022-11-18 |
Family
ID=71079952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180026108.6A Pending CN115362232A (en) | 2020-04-01 | 2021-03-09 | Adhesive tape, in particular cable-winding tape for winding cables in motor vehicles |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN115362232A (en) |
| DE (1) | DE202020101775U1 (en) |
| WO (1) | WO2021197772A1 (en) |
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| DE102006047734A1 (en) | 2006-10-06 | 2008-04-10 | Tesa Ag | Adhesive tape with a carrier which is composed of one or more carrier films, wherein an adhesive is at least partially applied to the carrier at least on one side |
| DE102017112603A1 (en) | 2017-06-08 | 2018-12-13 | Lisa Dräxlmaier GmbH | EMC and ESD protective housing made of electrically conductive polyamide |
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2020
- 2020-04-01 DE DE202020101775.6U patent/DE202020101775U1/en active Active
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- 2021-03-09 CN CN202180026108.6A patent/CN115362232A/en active Pending
- 2021-03-09 WO PCT/EP2021/055870 patent/WO2021197772A1/en active Application Filing
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|---|---|---|---|---|
| WO2005017012A1 (en) * | 2003-08-06 | 2005-02-24 | World Properties, Inc. | Electrically conductive pressure sensitive adhesives, method of manufacture, and use thereof |
| CN101090011A (en) * | 2006-06-14 | 2007-12-19 | 清华大学 | Electromagnetic shielded cable |
| CN101681703A (en) * | 2007-02-13 | 2010-03-24 | 蒂萨公司 | Intrinsic heatable hot melt adhesive sheet materials |
| US20090226708A1 (en) * | 2008-03-04 | 2009-09-10 | Lintec Corporation | Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet |
| EP2740778A1 (en) * | 2012-12-04 | 2014-06-11 | Carl Meiser GmbH & Co. KG | Application material and method for applying an application material on a support |
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| CN109049924A (en) * | 2018-08-15 | 2018-12-21 | 扬州腾飞电缆电器材料有限公司 | A kind of high insulation shielding band and preparation method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE202020101775U1 (en) | 2020-05-26 |
| WO2021197772A1 (en) | 2021-10-07 |
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