ORANGE COLORING OF TEXTILE SUBSTRATE WITH TRANSITION-METAL- BASED PIGMENT

Abstract

Adhesive tape, in particular wrapping tape for sheathing cables in automobiles, having a textile support and at least one adhesive layer applied to one side or both sides of the support, wherein the support is colored by an in particular yellow dye, characterized in that entirely or partially inorganic mineral pigments are used as the dye. In a preferred embodiment, as pigments of the mineral class of phosphates, arsenates or vanadates, clinobisvanites are used.

Claims

1. An adhesive tape for sheathing cables in automobiles, comprising: a textile substrate and at least one adhesive layer applied to one or both faces of the substrate, the substrate being colored by a dye constituted entirely or partially of inorganic mineral pigments.

2. The adhesive tape according to claim 1, wherein the inorganic mineral pigments are of the mineral class of oxides and hydroxides, and/or of phosphates, arsenates, or vanadates.

3. The adhesive tape according to claim 2, wherein pyrochlores or rutiles are used as pigments of the mineral class of oxides and hydroxides.

4. The adhesive tape according to claim 2, characterized, wherein clinobisvanites are used as pigments of the mineral class of phosphates, arsenates, or vanadates.

5. The adhesive tape according to claim 1, wherein the inorganic mineral pigment has a yellow color.

6. The adhesive tape according to claim 1, wherein the dye is a mixture of yellow inorganic mineral pigments and red organic pigments.

7. The adhesive tape according to claim 1, wherein the dye is a mixture of yellow inorganic mineral pigments and red inorganic pigments.

8. The adhesive tape according to claim 1, wherein individual filaments of the textile substrate are colored with the dye.

9. The adhesive tape according to claim 1, wherein the substrate consists at least partially of polyester, polypropylene, polyethylene, or polyamide fibers.

10. The adhesive tape according to claim 1, wherein the adhesive coating is an adhesive compound based on natural rubber, synthetic rubber, acrylate, and preferably an acrylate melt adhesive compound.

Description

[0019] Very particularly preferred is an embodiment of the invention, in which the dye is a mixture of yellow inorganic mineral pigments and red organic pigments. Alternatively, the dye may also be a mixture of yellow inorganic mineral pigments and red inorganic pigments. The red organic pigments are advantageously those from the class of perylenes, and of course also further classes are conceivable. If red inorganic pigments are used, the invention again recommends the use of those from the group of pyrochlores. The mentioned red pigments are also offered by the above-mentioned company Habich under the mentioned trade name Duropal.

[0020] The yellow dye can be made on the basis of inorganic mineral pigments under use of a yellow niobium-tin-pyrochlor mineral for example. While the inorganic mineral pigments are typically present and used in yellow color, red organic pigments may also be used if the dye is a mixture of yellow inorganic mineral pigments red organic pigments. As an alternative to the above-mentioned red organic pigments from the class of perylenes, red pigments from an azo compound can also be used.

[0021] In any case, an orange coloring of the substrate and thus of the adhesive tape can be attained with the help of a dye mixture of the yellow inorganic mineral pigments and the red organic or inorganic mineral pigments.

[0022] In particular, the color RAL 2003 (pastel orange) required for the applications described above can be specified and adjusted. Organic pigments based on an azo compound are compounds that have already been described in principle in EP 2 546 317, which are referred to at this point.

[0023] The coloration of the substrate can be carried out in principle by a spinning nozzle coloring, so that the dye is added to an extrudate and penetrates during the extrusion into the thus produced fibers and thus colors same.

[0024] The preferably used spinning nozzle coloring is carried out in such a way that the dye or the pigments usually have a grain size of less than 0.5 mm, in particular less than 100 μm and preferably of less than 50 μm. Also, it has proven favorable for the mixture of the inorganic mineral pigments with the organic pigments, if the mixing ratio is located in the range of 20:80 to 80:20 mass fractions of the inorganic to the organic pigments. Finally, the pigments in the extrudate are usually caused to be present in a concentration of 0.2 to 3.0 mass-% during the spinning nozzle coloring, based on the polymeric spinning compound, and are then extruded together with the polymeric spinning compound.

[0025] In addition, so-called piece coloration is possible in principle, for example by coloring the substrate in a dispersion. The coloring may be carried out from an aqueous solution of the pigments with, if necessary, additional use of auxiliary agents, as described in principle in EP 2 546 317 in this context. Generally, however, the invention uses a spinning nozzle coloring.

[0026] The substrate is at least partly made of polyester, polypropylene, polyethylene or polyamide fibers. Particularly preferably, the substrate is made of polyester fibers. Here, in principle, any kind of textile substrates have proven favorable, for example a fleece, a fabric, or even a mesh. In addition, in this way, multilayered substrates are conceivable, in principle for example, from a fleece or fabric and can be produced and colored in the manner described.

[0027] The weight of the substrate can normally be up to 200 g/m.sup.2 and preferably even up to 500 g/m.sup.2. For the adhesive compound or the adhesive layer made in this way, an application weight in the range of 20 g/m.sup.2 to 200 g/m.sup.2 is considered particularly favorable.

[0028] For the realization of the adhesive layer, the invention recommends adhesive compounds based on natural rubber or on synthetic rubber. Particularly preferred are adhesive compounds based on acrylate and here in particular acrylate melt adhesive compounds that can be for example UV cross linked.

[0029] The adhesive tape made in this way is particularly advantageously used as wrapping tape for sheathing cables in automobiles. For this purpose, the wrapping tape in question is wound around the elongated cables in a spiral. In principle, however, an axially extending protective sheathing for the cables in question can also be made in this way. In this case, the axial sheathing of the elongated cables is carried out by the adhesive tape or a protective sheath made in this way.