UV-curable adhesive tape and method for jacketing elongated items, especially leads

Patent metadata

Field	Value
Publication number	US-11965121-B2
Application number	US-202016785847-A
Country	US
Kind code	B2
Filing date	Feb 10, 2020
Priority date	Feb 8, 2019
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

The present disclosure relates to an adhesive tape and to a method for jacketing an elongated item, more particularly cable sets. The adhesive tape comprises a tapelike carrier provided on at least one side with an adhesive layer which consists of a self-adhesive, pressure-sensitive adhesive, characterized in that the self-adhesive pressure-sensitive adhesive is a UV-curable composition comprising, based on the total weight of the composition: 15 to 50 parts by weight of matrix polymer; 50 to 85 parts by weight of epoxy resin; 0.1 to 3 parts by weight of photoinitiator, with the matrix polymer forming a self-supporting film in which epoxy resin and photoinitiator are embedded.

First claim

The invention claimed is:

1. A method for jacketing an elongated item, said method comprising guiding an adhesive tape comprising a tapelike carrier provided on at least one side with an adhesive layer which consists of a self-adhesive, pressure-sensitive adhesive, wherein the self-adhesive pressure-sensitive adhesive is a UV-curable composition comprising, based on a total weight of the composition:
15 to 50 parts by weight of matrix polymer;
50 to 85 parts by weight of epoxy resin; and
0.1 to 3 parts by weight of photoinitiator,
with the matrix polymer forming a self-supporting film in which epoxy resin and photoinitiator are embedded where the adhesive tape is guided in a helical line around the elongated item or wrapping the elongated item in an axial direction by the adhesive tape, bringing the elongated item together with the adhesive tape into a desired disposition, holding the elongated item in this disposition, and curing the curable adhesive by supplying UV radiation energy.

2. The adhesive tape of claim 1 , wherein the UV-curable composition, based on its total weight, comprises 20-40 parts by weight of matrix polymer.

3. The adhesive tape of claim 1 , wherein the UV-curable composition, based on its total weight, comprises 60 to 75 parts by weight of epoxy resin.

4. The adhesive tape of claim 1 , wherein the matrix polymer is selected from the group consisting of styrene copolymers, acrylate copolymers, methacrylate copolymers, thermoplastic polyurethanes, copolyesters, copolyamides and ethylene-vinyl acetate copolymers and mixtures thereof.

5. The adhesive tape of claim 1 , wherein the epoxy resin is selected from the group consisting of 3,4-epoxycyclohexylmethyl 3′,4′-epoxycyclohexanecarboxylate (EEC) and derivatives, dicyclopentadiene dioxide and derivatives, 3-ethyl-3-oxetanemethanol and derivatives, diglycidyl tetrahydrophthalate and derivatives, diglycidyl hexahydrophthalate and derivatives, ethane 1,2-diglycidyl ether and derivatives, propane 1,3-diglycidyl ether and derivatives, 1,4-butanediol diglycidyl ether and derivatives, higher alkane 1,n-diglycidyl ethers and derivatives, bis[(3,4-epoxycyclohexyl)methyl] adipate and derivatives, vinylcyclohexyl dioxide and derivatives, 1,4-cyclohexanedimethanol bis(3,4-epoxycyclohexanecarboxylate) and derivatives, diglycidyl 4,5-epoxytetrahydrophthalate and derivatives, bis[1-ethyl(3-oxetanyl)methyl] ether and derivatives, pentaerythritol tetraglycidyl ether and derivatives, bisphenol A diglycidyl ether (DGEBA), hydrogenated bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, hydrogenated bisphenol F diglycidyl ether, epoxyphenol novolacs, hydrogenated epoxyphenol novolacs, epoxycresol novolacs, hydrogenated epoxycresol novolacs, 2-(7-oxabicyclo[4.1.0]hept-3-yl);spiro[1,3-dioxane-5,3′-[7]oxabicyclo[4.1.0]heptane 1,4-bis((2,3-epoxypropoxy)methyl)cyclohexane.

6. The adhesive tape of claim 1 , wherein the carrier material is UV-transparent.

7. The adhesive tape of claim 1 , wherein the carrier material comprises a polyester nonwoven.

8. The method of claim 1 , wherein the UV radiation energy is supplied over a period of 0.5 sec to 6 min.

9. The method of claim 1 , wherein the adhesive tape has an adhesive layer only on one side thereof.

10. The method of claim 1 , wherein the curable adhesive layer of the adhesive tape is uncured when the adhesive tape is guided in a helical line around the elongated item or wrapping the elongated item in an axial direction by the adhesive tape, bringing the elongated item together with the adhesive tape into a desired disposition, holding the elongated item in this disposition, and only subsequently is the curable adhesive layer of the adhesive tape cured by supplying UV radiation energy.

Assignees

• Tesa Se

Inventors

• Klingeberg Kerstin
• Guldbrandsen Lars
• Wedel Nadine
• Simonis Heike
• Schuh Christian

Classifications

• C09J7/38 Primary

  Pressure-sensitive adhesives [PSA] · CPC title

• C09J7/255

  Polyesters · CPC title

• C09J153/00

  Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers · CPC title

• C09J163/00

  Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins · CPC title

• C09J163/04

  Epoxynovolacs · CPC title