Method for jacketing elongate articles, in particular lines

Patent metadata

Field	Value
Publication number	US-12555704-B2
Application number	US-202017630420-A
Country	US
Kind code	B2
Filing date	Jul 24, 2020
Priority date	Jul 26, 2019
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

The invention relates to a method for jacketing elongate articles, such as lines or cable harnesses in particular, by means of an adhesive tape comprising a tape-shaped substrate, which substrate has, on at least one side, a thermally curable, meltable, preferably pressure-sensitive adhesive layer, the adhesive layer comprising an epoxide-functionalized acrylonitrile-butadiene copolymer which has on average more than 1.5 epoxide groups per molecule and comprising the reaction product of phthalic anhydride and diethylene-triamine, the adhesive tape being led in a helix around the elongate article or the elongate article being enveloped by the adhesive tape in the axial direction, the elongate article together with the enveloping adhesive tape being brought into the desired arrangement, in particular into the cable harness plan, the elongate article being held in this arrangement, and the curable adhesive mass being cured by supplying thermal energy, in particular at a temperature of up to 110° C.

First claim

The invention claimed is:

1 . A method comprising jacketing an elongated item with an adhesive tape comprising a tapelike carrier provided on at least one side with a thermally curable, meltable adhesive layer, wherein the adhesive of the adhesive layer can be processed in a temperature range between approximately 40° C. and 60° C. as a melt in a compounding and extruding operation, the adhesive layer comprising an epoxide-functionalized acrylonitrile/butadiene copolymer having on average more than 1.5 epoxide groups per molecule of the copolymer and the reaction product of phthalic anhydride and diethylenetriamine, said method comprising (a) guiding the adhesive tape in a helical line around the elongated item or (b) wrapping the elongated item in an axial direction with the adhesive tape to yield in the case of both (a) and (b) an elongated item wrapped with the adhesive tape, bringing the elongated item wrapped with the adhesive tape into a desired disposition, holding the elongated item wrapped with the adhesive tape in this disposition, and curing the thermally curable, meltable adhesive layer by the supply of thermal energy, wherein the thermally curable, meltable adhesive layer will completely cure at a temperature of up to 110° C.

2 . The method as claimed in claim 1 , wherein the epoxide-functionalized acrylonitrile/butadiene copolymer in the thermally curable, meltable adhesive layer is the chemical reaction product of a carboxyl-terminated acrylonitrile/butadiene copolymer with a bisphenol A diglycidyl ether or a bisphenol F diglycidyl ether or epichlorohydrin.

3 . The method as claimed in claim 1 , wherein the epoxide-functionalized acrylonitrile/butadiene copolymer is the chemical reaction product of a carboxyl-terminated acrylonitrile/butadiene copolymer with a bisphenol A diglycidyl ether or bisphenol F diglycidyl ether chain-extended by chemical reaction with bisphenol A or bisphenol F.

4 . The method as claimed in claim 1 , wherein the reaction product of phthalic anhydride and diethylenetriamine has a free diethylenetriamine content of between inclusively 1.0 and 5.0 percent by weight.

5 . The method as claimed in claim 1 , wherein the reaction product of phthalic anhydride and diethylenetriamine has to an extent of at least 95 percent by weight a particle size of less than or equal to 70 μm, measured by laser light scattering according to ISO 13320:2009.

6 . The method as claimed in claim 1 , wherein the carrier material comprises a polyester nonwoven.

7 . The method as claimed in claim 1 , wherein the adhesive has sunk into the carrier to an extent of more than 10%.

8 . The method as claimed in claim 1 , wherein the thermally curable, meltable adhesive layer is thermally curable at a temperature between 60° C. and 110° C.

9 . The method as claimed in claim 1 , wherein the thermal energy is supplied over a period of 0.5 sec to 10 min.

10 . A jacketed elongated item obtained by the method as claimed in claim 1 .

11 . A vehicle comprising a jacketed elongated item as claimed in claim 10 .

12 . A method comprising jacketing an elongated item with an adhesive tape comprising a tapelike carrier provided on at least one side with a thermally curable, meltable adhesive layer, wherein the adhesive of the adhesive layer can be processed in a temperature range between approximately 40° C. and 60° C. as a melt in a compounding and extruding operation, the adhesive layer consisting of:
(A) an epoxide-functionalized acrylonitrile/butadiene copolymer having on average more than 1.5 epoxide groups per molecule of the copolymer;
(B) the reaction product of phthalic anhydride and diethylenetriamine;
(C) optionally one or more fillers;
(D) optionally one or more tackifiers;
(E) optionally bitumen;
(F) optionally one or more plasticizers; and
(G) optionally one or more auxiliaries and/or adjuvants;

said method comprising (a) guiding the adhesive tape in a helical line around the elongated item or (b) wrapping the elongated item in an axial direction with the adhesive tape to yield in the case of both (a) and (b) an elongated item wrapped with the adhesive tape, bringing the elongated item wrapped with the adhesive tape into a desired disposition, holding the elongated item wrapped with the adhesive tape in this disposition, and curing the thermally curable, meltable adhesive layer by the supply of thermal energy, wherein the thermally curable, meltable adhesive layer will completely cure at a temperature of up to 110° C.

Assignees

• Tesa Se

Inventors

• Klingeberg Kerstin
• Simonis Heike
• Guldbrandsen Lars
• Schuemann Uwe

Classifications

• H01B13/01281

  Harness wrapping apparatus · CPC title

• C09J109/02 Primary

  Copolymers with acrylonitrile · CPC title

• C09J5/06

  involving heating of the applied adhesive · CPC title

• C09J7/383

  Natural or synthetic rubber · CPC title

• C09J2477/00

  Presence of polyamide · CPC title