ADHESIVE TAPE FOR WRAPPING MOTOR-VEHICLE CABLES

Abstract

The subject matter of the invention is an adhesive tape, in particular a wrapping tape for sheathing cables (1) in automobiles, comprising a strip-type fabric backing (2, 3) that has at least one first layer (2) made of a woven fabric and a second layer (3) made of a nonwoven, the two layers being coupled together by a polymer layer (4) and/or by threads that penetrate both layers (2, 3), and comprising an adhesive layer (5) applied to at least one side of the backing (2, 3), characterised in that the nonwoven is produced from an aromatic polyamide.

Claims

1. An adhesive tape for wrapping cables in automobiles, the tape comprising: a first layer consisting of a woven fabric; a second nonwoven layer made of aromatic polyamide; a polymer layer and/or filaments that penetrate and bond together the first and second layers to form therewith a textile substrate band having two outer faces; and, and an adhesive layer applied to at least one of the outer faces of the substrate band.

2. The adhesive tape according to claim 1, wherein the second nonwoven layer is equipped with the adhesive layer.

3. The adhesive tape according to either claim 1, wherein the second nonwoven layer faces inward when the tape is installed and wrapped around the cables.

4. The adhesive tape according to claim 1, wherein the nonwoven is a mechanically strengthened needled felt.

5. The adhesive tape according to claim 4, wherein the nonwoven is mechanically strengthened by water jets and/or air and/or needling.

6. The adhesive tape according to claim 1, wherein the woven fabric consists of polyamide and/or polyester filaments.

7. The adhesive tape according to claim 1, wherein the substrate band has a basis weight of from 50 g/m.sup.2 to 500 g/m.sup.2.

8. The adhesive tape according to claim 1, wherein the tape has an abrasion resistance of at least class C according to LV 312, and is formed so as to be impact-resistant according to LV 312.

9. The adhesive tape according to any of claims 1 to 8, claim 1, wherein the woven fabric and the nonwoven each have a basis weight of from 50 g/m.sup.2 to 200 g/m.sup.2.

10. The adhesive tape according to claim 1, wherein the adhesive coating is applied to the substrate band at a basis weight of from 50 g/m.sup.2 to 150 g/m.sup.2.

Description

[0023] In the following, the invention will be explained in greater detail with reference to drawings showing merely one embodiment, in which drawings:

[0024] FIG. 1 shows a first embodiment of the adhesive tape according to the invention, and

[0025] FIG. 2 shows a second preferred embodiment of the adhesive tape according to the invention.

[0026] The adhesive tape according to the invention for wrapping cables 1 in automobiles is first provided with a textile substrate band 2, 3. The textile substrate band 2, 3 is composed of a first layer 2 consisting of a woven fabric, and a second layer 3 consisting of a nonwoven. According to the embodiment, the two layers 2, 3 are rigidly interconnected by a polymer layer 4 that bonds together the two layers 2, 3 over their entire surfaces. The polymer layer 4 can be an adhesive layer. Alternatively or in addition, the two layers 2, 3 can also be coupled together by filaments that penetrate the two layers 2, 3 in a manner similar to sewing filaments in a stitch-bonded nonwoven. Furthermore, an adhesive layer 5 is also provided that is applied on at least one face of the substrate band 3, 4.

[0027] According to the embodiment in FIG. 1, the adhesive layer 5 is located on the first layer or the woven fabric. Accordingly, the woven fabric comprising the adhesive layer 5 thereon is oriented toward the inside, facing toward the cables 1 to be sheathed. In contrast, when installed shown in FIG. 1 the second nonwoven layer 3 faces outward. In the preferred embodiment in FIG. 2, the arrangement is reversed. In this case, the second nonwoven layer 3 is equipped with the adhesive layer 5. Accordingly, when installed the second nonwoven layer 3 faces inward, toward the cable 1. In this preferred case, the first woven layer 2 is oriented, when installed, so as to face outward.

[0028] Either way, the nonwoven or the second nonwoven layer 3 is produced, as a whole, from an aromatic polyamide. In fact, at this point fibers from the aromatic polyamide in question are used, in particular aramid fibers. The nonwoven or the second nonwoven layer 3 is formed, as a whole, as a mechanically strengthened needled felt. For this purpose, the nonwoven can be mechanically strengthened by water jets or needling.

[0029] The first woven layer 2 used at this point is one such in which the warp and weft filaments are produced from polyamide and/or polyester. In this case, the fineness of the warp and weft filaments may be the same in each case. Typically, finenesses of more than 100 dtex are used here for the warp and weft filaments.

[0030] The substrate band 2, 3 is provided as a whole with a basis weight of from 50 g/m.sup.2 to 500 g/m.sup.2. Furthermore, the substrate band 2, 3 or the adhesive tape as a whole has an abrasion resistance of at least class C according to LV 312. In general, an abrasion resistance of at least class D is observed. In addition, the substrate band 2, 3, and consequently the adhesive tape, is as a whole also formed so as to be impact resistant according to the specifications in LV 312.

[0031] The adhesive coating 5 is generally applied to the first layer 2 or the woven fabric having a grammage of from 50 g/m.sup.2 to 150 g/m.sup.2. In this case, conventional hot-melt adhesives such as those based on acrylate have been found to be particularly favorable, which adhesives can be applied, by way of example by a nozzle application process, to the first woven layer 2.