Method for jacketing elongate material, especially leads or cable looms

Abstract

Method for jacketing elongate material such as more particularly leads or cable looms, where an adhesive tape comprising a carrier, more particularly textile carrier with a curative composition applied to its top side and a reactive composition to its bottom side, is passed in a helical line around the elongate material, or the elongate material is wrapped in the axial direction by the adhesive tape in such a way that the curative composition and the reactive composition come into contact, the elongate material together with the adhesive tape wrapping is brought into the desired disposition, more particularly into the cable loom layout, the elongate material is held in this disposition, the curative composition reacts with the reactive composition, to produce a curing layer of composition.

Claims

1. A method for jacketing elongate material, said method comprising: (A) providing an adhesive tape comprising a carrier having a curative composition applied to its top side and a reactive composition applied to its bottom side, the adhesive tape further comprising a release film between the carrier and the reactive composition, (B) passing said adhesive tape in a helical line around the elongate material or wrapping the elongate material in the axial direction with the adhesive tape in such a way that the curative composition and the reactive composition come into contact, (C) bringing the elongate material together with the adhesive tape wrapping into a desired disposition, (D) holding the elongate material in this disposition, and (E) reacting the curative composition with the reactive composition to produce a curing layer of composition.

2. Method according to claim 1, wherein the curative composition and/or the reactive composition, following application to the carrier, have sunken into the carrier to an extent of more than 10%.

3. Method according to claim 1, wherein the curative composition and/or the reactive composition, following application to the carrier, completely saturate the carrier.

4. Method according to claim 1, wherein the carrier has a basis weight of 30 to 250 g/m.

5. Method according to claim 1, wherein the carrier is a textile carrier.

6. Method according to claim 5, wherein the textile carrier consists of polyester or of glass fibers.

7. Method according to claim 1, wherein the reactive composition takes the form of (A) an adhesive composition; (B) a wet layer in solution or as a dispersion; or (C) a composition embedded in a surface-coating material.

8. Method according to claim 1, wherein the reacting the curative composition with the reactive composition to produce a curing layer of composition involves curing at reduced deblocking temperature, or an acid-base reaction not requiring heating, or an epoxy-amine reaction not requiring heating.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the drawings:

(2) FIG. 1 shows the adhesive tape according to a first advantageous embodiment in lateral section;

(3) FIG. 2 shows the adhesive tape according to a second advantageous embodiment in lateral section;

(4) FIG. 3 shows a version of the invention in which two adhesive tapes are used; and

(5) FIG. 4 shows a variant of the invention in which two adhesive tapes and one covering are used; and

(6) FIG. 5 shows a detail of a cable loom which is composed of a bundle of individual cables and is jacketed with the adhesive tape of the invention.

(7) FIG. 1 shows in section in the transverse direction (transverse section) the adhesive tape 3, which consists of a nonwoven carrier 31, the top side of which bears a curative composition 32 and the bottom side of which bears a reactive composition 33.

(8) The curative composition 32 has sunken into the carrier 31 to an extent of 25%, thereby producing optimum anchorage (39).

(9) Between carrier 31 and reactive composition 33 there is a release film 34 present. Furthermore, reactive composition 33 is lined on its free side with a liner 35.

(10) Both curative composition 32 and reactive composition 33 have been applied over the entire width of the carrier 31, in other words over the full area.

(11) FIG. 2 shows in section in the transverse direction (transverse section) another version of the adhesive tape 3, consisting of a nonwoven carrier 31 whose top face bears a curative composition 32 and whose bottom face bears a reactive composition 33.

(12) The curative composition 32 has sunken into the carrier 31 to an extent of 25%, thereby producing optimum anchorage (39).

(13) Between carrier 31 and reactive composition 33 there is a release film 34 present. The release film extends over the entire width of the carrier 31.

(14) Both curative composition 32 and reactive composition 33 are applied in the form of a stripe. The stripe of curative composition 31 extends from one longitudinal edge of the carrier 31 to the middle of the carrier 31. The stripe of the reactive composition 33 extends from the opposite edge of the carrier 31 to the middle of the carrier 31.

(15) FIG. 3 shows an alternative of the method of the invention for the jacketing of elongate material. For this purpose, an adhesive tape system is used which is composed of a first adhesive tape 3, comprising a textile carrier 31 whose top face bears a curative composition 32, and a second adhesive tape 3a comprising a textile carrier 31a whose bottom face bears a reactive composition 33.

(16) Both curative composition 32 and reactive composition 33 have each sunken into the carriers 31, 31a to an extent of 25%, thereby producing optimum anchorage (39, 39a).

(17) The first adhesive tape 3 and the second adhesive tape 3a are passed in a helical line around the elongate material, or envelop the elongate material in the axial direction, in a manner such that the curative composition 32 of the first adhesive tape 3 comes into contact with the reactive composition 33 of the second adhesive tape 3a.

(18) One of the adhesive tapes 3, 3a here is wound such that the carrier 31, 31a is in contact with the material by its uncoated side, so that the curative composition 32 and/or the reactive composition 33 point outwards. The other adhesive tape 3, 3a is then wound in such a way that curative composition 32 and reactive composition 33 lie on top of one another, so that the uncoated side of the other adhesive tape 3, 3a points outwards.

(19) FIG. 4 represents a further version of the invention. This version embraces a jacketing 5 consisting of a covering 4 where there is a first adhesive tape 3 present in an edge region of the covering 4, this adhesive tape 3 being bonded on the covering 4 in such a way that the first adhesive tape 3 extends over one of the longitudinal edges of the covering 4, specifically in an edge region which is narrow by comparison with the width of the covering 4. This first adhesive tape 3 consists of a textile carrier 31, to which the curative composition 32 is applied.

(20) In the edge region of the covering 4, and specifically at the opposite longitudinal edge, the jacketing has a second adhesive tape 3a, which is bonded on the covering 4 in such a way that the adhesive tape 3a extends over the other of the two longitudinal edges of the covering 4, likewise in an edge region which is narrow by comparison with the width of the covering 4. The second adhesive tape 3a likewise consists of a textile carrier 31a bearing the reactive composition 33.

(21) The width (B3) of the covering 4 is greater by a factor of 1.5 than the sum total of the widths (B1, B2) of the adhesive tapes 3, 3a.

(22) FIG. 5 shows a detail of a cable loom which is composed of a bundle of individual cables 7 and which is jacketed with the adhesive tape 3 of the invention, here depicted in simplified form, according to the version described in FIG. 1. The adhesive tape 3 is passed in a spiral movement around the cable loom.

(23) The detail of the cable loom that is shown shows two turns I and II of the adhesive tape 3. Further turns would extend to the left; these turns have not been shown here.

(24) The wrapping of the adhesive tape 3 takes place with an offset 3V of 50%, which in this figure is indicated by the darker colour.