Adhesive tapes for sheathed wire protection

Abstract

An adhesive tape suitable for use with sheathed wires comprises a first layer of polyester and a second layer of adhesive. The adhesive includes a UV curable acrylic polymer and a cationic photoinitiator. The polyester is polyethylene terephthalate. The acrylic polymer contains an acrylic monomer selected from a specified group. The first layer has a thickness equal to or greater than 0.05 and equal to or less than 0.50 mm, preferably greater than 0.05 and equal to or less than 0.50 mm, more preferably equal to or greater than 0.15 and equal to or less than 0.30 mm, even more preferably equal to or greater than 0.018 and equal to or less than 0.22 mm. The adhesive is at least partially absorbed into the first layer. The second layer has a coating weight equal to or greater than 15 and equal to or less than 75 g/m2, preferably equal to or greater than 20 and equal to or less than 60 g/m2, more preferably equal to or greater than 30 and equal to or less than 50 g/m2. The adhesive tape is wound about a cylindrical support to form a spool. The tape is applied to sheathed wires within an automotive engine, where each sheathed wire comprises a polypropylene sheath around a metal conductor, with the polypropylene sheath containing equal to or less than 1 weight % halogen.

Dependencies are inferred from the claim text.