阅读说明：本技术 胶粘带、尤其是用于包覆汽车中的线缆的卷缠带 (Adhesive tape, in particular a wrapping tape for covering cables in motor vehicles ) 是由 T·利尔曼 于 2019-02-27 设计创作，主要内容包括：本发明涉及一种胶粘带、尤其是用于包覆汽车中的线缆(1)的卷缠带,其具有带状的织物载体(2、3),所述织物载体至少具有由纺织物制成的第一层(2)和由无纺布制成的第二层(3),这两个层相互通过聚合物层(4)和/或通过穿过所述两个层(2、3)的纱线相互耦联；并且所述胶粘带具有施加到载体(2、3)的至少一个侧面上的粘合层(5),其特征在于,所述无纺布由芳族聚酰胺制成。(The invention relates to an adhesive tape, in particular a wrapping tape for wrapping a cable (1) in a motor vehicle, comprising a tape-shaped textile support (2, 3) having at least a first layer (2) made of a textile fabric and a second layer (3) made of a non-woven fabric, which are coupled to one another by a polymer layer (4) and/or by yarns running through the two layers (2, 3); and having an adhesive layer (5) applied to at least one side of the carrier (2, 3), characterized in that the nonwoven is made of aramid.)

1. Adhesive tape, in particular a wrapping tape for wrapping a cable (1) in a motor vehicle, having a tape-shaped textile support (2, 3) comprising at least a first layer (2) made of a textile fabric and a second layer (3) made of a nonwoven fabric, which are coupled to each other by a polymer layer (4) and/or by yarns passing through the two layers (2, 3); and having an adhesive layer (5) applied to at least one side of the carrier (2, 3), characterized in that the nonwoven is made of aramid.

2. Adhesive tape according to claim 1, characterized in that the second layer (3) made of non-woven fabric is provided with the adhesive layer (5).

3. Adhesive tape according to claim 1 or 2, characterised in that the second layer (3) made of non-woven fabric is directed inwards in the assembled state.

4. The adhesive tape according to any one of claims 1 to 3, wherein the nonwoven fabric is configured as a mechanically reinforced needle-punched nonwoven fabric.

5. Adhesive tape according to claim 4, characterized in that the nonwoven is mechanically reinforced by means of hydroentangling and/or wind-and/or needle-punching.

6. The adhesive tape according to any one of claims 1 to 5, wherein the textile has yarns made of polyamide and/or polyester.

7. The adhesive tape according to any one of claims 1 to 6, wherein the carrier (2, 3) has 50g/m²To 500g/m²Weight per unit area of (c).

8. The adhesive tape according to any one of claims 1 to 7, characterized in that the adhesive tape has an abrasion resistance according to LV312 of at least class C, in particular class D, and additionally is impact-resistant configured according to LV 312.

9. The adhesive tape according to any one of claims 1 to 8, wherein the woven fabric and the nonwoven fabric each have a thickness of 50g/m²To 200g/m²Weight per unit area of (c).

10. The adhesive tape according to any one of claims 1 to 9, wherein the adhesive coating is applied at 50g/m²To 150g/m²The grammage between is applied to the carriers (2, 3).

Technical Field

The invention relates to an adhesive tape, in particular a wrapping tape for wrapping cables in motor vehicles, having a tape-shaped textile support, which comprises at least a first layer made of a textile fabric and a second layer made of a nonwoven fabric, which are coupled to one another by a polymer layer and/or by yarns running through the two layers, and having an adhesive layer applied to at least one side of the support.

Background

Adhesive tapes and especially wrap tapes for covering automobiles have to meet various and sometimes contradictory requirements. Therefore, high medium resistance with respect to, for example, oil or gasoline is typically required for such adhesive tapes. Furthermore, higher temperature tolerances are required, for example in the range of minus 50 ℃, in particular minus 40 ℃ up to plus 150 ℃ and higher. Furthermore, noise reduction properties are generally considered to be advantageous, in particular to avoid rattling in the assembled state. In addition, in most cases it is also desirable to carry out the simple handling in such a way that the associated adhesive tape can be removed by hand.

In recent years, higher and higher mechanical requirements have been placed on the relevant adhesive tapes. Thus, the wear should not be excessive, for example in the case of frictional stresses, in order to protect the respective wound cable from damage. Furthermore, nowadays more and more requirements are being made, so that higher cutting strength or impact strength is required for the adhesive tape. This can be attributed to the fact that the relevant adhesive tape should generally protect the feeder from breakage instead of, for example, a hose sheath.

This type of requirement arises, for example, for the following cases: motor vehicles equipped with such adhesive tapes are subjected to impacts, in particular to side impacts. There is a risk here that, for example, the supply lines to the door lock are cut off or at least damaged.

As a result, the associated door lock may often no longer be opened. This then also applies to the assigned motor vehicle doors, which for example makes it more difficult for the arriving rescue personnel to rescue. No effective solution is available in this respect so far.

The state of the art according to EP 1911824B 2, which is up to date and corresponds to this type, therefore, is nevertheless generally directed to a cable-winding tape with a two-layer fabric carrier. The first fabric layer is a textile. The second textile layer is designed as a nonwoven. In the case of nonwovens these are designed as stitch-bonded nonwovens. The two fabric layers are attached to each other by an acrylate adhesive.

The woven fabric of the first fabric layer and/or the nonwoven fabric of the second fabric layer can be made entirely of a polyamide material and/or a polyester material. Since the nonwoven fabric is designed as a stitch-bonded nonwoven fabric, a higher tensile strength is nevertheless provided. However, this type of nonwoven is not always particularly impact-resistant or cut-resistant. It should be noted here that the aforementioned adhesive tape is provided with an outwardly directed textile fabric in the assembled state, while the adhesive layer is applied to the nonwoven.

Similar adhesive tapes are the subject of WO 2005/085379 a 1. Again, a highly wear resistant and noise reducing band is provided for lashing the wiring harness. The carrier provided has a first cover layer and a second cover layer, which are fixedly connected to one another over the entire surface by means of a further intermediate layer. The first cover layer can be designed as a textile. In contrast, the second cover layer is a velvet, a scrim, a woven or knitted fabric, i.e. no nonwoven is used as a whole. Instead, a nonwoven fabric can be used as an intermediate layer in the known teaching.

Finally, the prior art according to WO 2009/086570 a1, which is also to be considered, relates in its entirety to a protective device which likewise has a composite structure composed of a mechanical protective layer, a polymer connecting layer and an adhesive layer. The mechanical protective layer may be a nonwoven. In principle, high-strength organic fibers, such as aramids, can also be used here. But lacks an additional layer made of textile.

Disclosure of Invention

The object of the invention is to further develop an adhesive tape and a wrapping tape, in particular of the type described above, for covering cables in motor vehicles, such that the puncture resistance or impact resistance is increased overall in comparison with known embodiments while always maintaining a high abrasion resistance.

In order to solve this problem, adhesive tapes of this type and winding tapes for sheathing cables in motor vehicles in particular are within the scope of the invention characterized in that the nonwoven fabric is made of aramid.

In fact, it has been found to be particularly advantageous within the scope of the present invention to use special polyamides, i.e. aramids, for the production of nonwovens. This means polyamides in which the amide groups are linked to aromatic groups. Such aramids are for example sold under the trade name "Kevlar" or "Twaron" and are in principle commercially available.

In fact, the related aramids used for the manufacture of the nonwoven or of the second layer consisting of the nonwoven are characterized in that they have a high strength and also a high impact toughness and elongation at break. As a result, the second layer or nonwoven layer based on aramid can generally absorb possible impacts or cutting stresses in the case of the adhesive tape according to the invention. For this purpose, a second layer made of nonwoven is generally arranged to be directed inwards in the assembled state. That is, as long as the adhesive tape is used as a wrapping tape for covering a cable in an automobile, the design and arrangement of the relevant cable are selected such that the second layer made of nonwoven fabric is directed inward in a state of wrapping the cable. For this purpose, the second layer or nonwoven is also provided with the necessary adhesive layer to ensure that the adhesive tape according to the invention adheres to the cable.

In contrast, the first layer made of textile fabric is generally oriented outwardly. In this way, the cutting or impact loading of the adhesive tape according to the invention in the assembled state acts first on the textile and only then on the second layer made of nonwoven and the fibers made of aramid provided therein. It is expected that as a result, the textile fabric absorbs possible frictional stresses without problems owing to its outwardly directed arrangement. The nonwoven arranged thereunder then absorbs additional cutting or impact stresses particularly effectively. This is because the fibers made of aramid used ensure, above all, a reduction in possible impact stresses inside the nonwoven layer. Furthermore, the possible cutting or cutting stresses are absorbed without problems by the associated nonwoven fabric on the basis of the high tensile strength and toughness of the individual fibers. Furthermore, the nonwoven fabric simultaneously reduces possible noise.

The layer made of textile fabric pointing towards the outside in the assembled state ensures the additionally required wear resistance. For this purpose, textiles usually have yarns made of Polyamide (PA) and/or Polyester (PET). Combinations are also contemplated. Textiles made from this type of yarn are particularly resistant to abrasion, as demonstrated for example by the aforementioned EP 1911824B 2. In fact, for the adhesive tape according to the invention, in this way at least an average abrasion resistance according to the C-grade abrasion resistance of LV312 can be achieved. Often even high wear protection equivalent to class D is observed, sometimes even higher up to class E.

Here, the yarns of the textile typically have a titer of at least 100 dtex. In most cases even titers of 150dtex and above are observed. The number of warp and weft yarns in the associated textile fabric may be 5, up to 60 or even up to 80 yarns/cm. And are typically made using the same strength of the warp and weft yarns. That is to say that it is obviously not necessary to use weft yarns much thicker than the warp yarns according to the prior art, for example according to EP 2322385 a 1. In contrast, the two-layer structure with woven fabric and nonwoven fabric made of aramid fibers ensures, in combination, that not only the requirements for impact strength according to LV 312-3(2009) are met, but also a C-grade and in particular a D-grade according to LV 312-1(2009) and a higher abrasion resistance are observed.

The nonwoven used is advantageously a mechanically consolidated needle-punched nonwoven. For this purpose, the nonwoven can be mechanically consolidated by hydroentangling and/or wind-needling and/or needling. That is, the present invention intentionally foregoes the use of stitch-bonded nonwoven fabrics which are considered to be indispensable as in the context of EP 1911824B 2.

Since it has been shown that the stitch-bonded nonwoven has a high tensile strength in the longitudinal direction. However, this type of material is neither necessary nor necessary in the composite structure according to the invention, so that an additional step of stitch-bonding the nonwoven can be omitted and thus a simplified and cost-effective processing can be carried out. This is because nonwoven fabrics which are mechanically consolidated by hydroentanglement and/or needling can be produced particularly simply and cost-effectively. The tensile strength and the breaking strength required for the adhesive tape according to the invention are obtained overall by the combined effect between nonwoven and woven fabric.

The textile support generally has a mass of 50g/m²Up to 500g/m²Weight per unit area of (c). Here, not only the woven fabric but also the nonwoven fabric can have a thickness of 50g/m, respectively²To 200g/m²Weight per unit area of (c). The bond coat typically has a thickness of 50g/m²To 150g/m²Gram weight of (c).

The result is thus an adhesive tape which not only meets the typical requirements in terms of temperature resistance and medium resistance. Furthermore, the two-layer structure of woven fabric and nonwoven fabric ensures a noise reduction effect when used as a winding tape for covering cables in automobiles in a regulated manner. In this case, it is possible in principle to wind the adhesive tape as a longitudinal sheath around the relevant cable. But is usually carried out such that the adhesive tape is wound up on the relevant cable in a coil or spiral with the adhesive coating directed in the direction of the cable.

As a result, the second layer made of nonwoven is directed inwards. Since the nonwoven is made of aramid or corresponding aramid fibers, high impact strength and high cutting strength are provided in particular. The textile fabric lying above this additionally contributes to an increased wear resistance. Additional layers for realizing the carrier are possible, although not necessary. That is to say, the tape carrier generally ends up having a first layer made of a woven fabric and a second layer made of a nonwoven fabric.

The nonwoven fabric may generally be a fabric in which case fibers of limited length, i.e. staple fibers, are used. However, continuous fibers or filaments can also be used for processing. Fibrous nonwovens, i.e. such nonwovens composed of staple fibers, are generally used. The fibers are mechanically needled, specifically by needling, air needling, or by hydroentangling. This provides the necessary mechanical stability for the nonwoven or the second layer made of nonwoven.

Drawings

The invention is explained in more detail below on the basis of the drawings, which show only one embodiment, and in which:

fig. 1 shows an adhesive tape according to a first variant of the invention; and

fig. 2 shows an adhesive tape according to a preferred second embodiment of the present invention.

Detailed Description

The adhesive tape or wrapping tape according to the invention for covering cables 1 in motor vehicles is an adhesive tape which is initially equipped with a tape-shaped textile support 2, 3. The textile support 2, 3 in the form of a belt comprises a first layer 2 made of a woven fabric (Gewebe) and a second layer 3 made of a nonwoven fabric. The two layers 2, 3 are connected to one another in a fixed manner according to the present exemplary embodiment by means of a polymer layer 4 which couples the two layers 2, 3 to one another over their entire surface. The polymer layer 4 may be an adhesive layer. Alternatively or additionally, the two layers 2, 3 can also be coupled to one another by means of yarns which, like stitches in the case of stitch-bonded nonwovens, penetrate through the two layers 2, 3. Furthermore, an adhesive layer 5 is provided, which is applied to at least one side of the carrier 3, 4.

According to the embodiment in fig. 1, the adhesive layer 5 is present on a first layer or textile. The textile with the adhesive layer 5 lying thereon is thus oriented inwardly towards the cable 1 to be sheathed. In contrast, the second layer 3 made of nonwoven fabric is directed outwards in the assembled state shown in fig. 1. In the preferred variant in fig. 2, the opposite applies. Here, the second layer 3 made of nonwoven fabric is provided with an adhesive layer 5. The second layer 3 of non-woven fabric is thus directed inwards towards the cable 1 in the assembled state. The second layer 2 made of textile is here preferably oriented outwardly in the assembled state.

In either case, the nonwoven or the second layer 3 made of nonwoven is entirely made of aramid. Here, fibers made of the relevant aramids, in particular aramide fibers, are actually used. The nonwoven or the second layer 3 of nonwoven is designed as a mechanically reinforced needle-punched nonwoven as a whole. For this purpose, the nonwoven can be mechanically consolidated by hydroentanglement or needling.

The first layer 2 or the textile used here is a textile in which case the warp and weft threads are made of polyamide and/or polyester. In this case, the titer of the warp and weft threads may be designed to be the same in each case. Here, typically warp and weft threads having a titer of more than 100dtex are used.

The supports 2, 3 were equipped with 50g/m in total²To 500g/m²Weight per unit area of (c). Furthermore, the carrier 2, 3 or the adhesive tape as a whole has an abrasion resistance according to LV312 of at least class C. Abrasion resistance of at least class D is generally observed. In addition, the supports 2, 3 and therefore the adhesive tape as a whole are also designed to be impact-resistant according to the specifications of the LV 312.

The bond coat 5 is typically at 50g/m²To 150g/m²The grammage in between is applied to the first layer 2 or textile. It has been found to be particularly advantageous here for a conventional hot melt adhesive, for example an acrylic hot melt adhesive, which can be applied, for example, by means of a nozzle application method to the relevant first layer 2 made of textile fabric.