Abstract: A pressure-sensitive adhesive tape substrate consisting of polyolefinic film (such as polypropylene, polyethylene or more especially an ethylene propylene copolymer) contains a thermoplastic elastomer, usually in an amount below 30 parts by weight per hundred parts of polyolefine and, for example, polyisobutylene or styrene butadiene block copolymer, in order to impart increased splitting resistance in a transverse direction.
Type:
Grant
Filed:
January 14, 1975
Date of Patent:
November 23, 1976
Assignee:
Adhesive Tapes Limited
Inventors:
Geoffrey Langford Butler, Brian Gratton