Patent ID: 6451425
Filing Date: 2002-09-17
Classification: C08L,C09J,Y10S,Y10T

Abstract:
An adhesive tape backing comprising a monolayer film comprised of 40 to 90% isotactic polypropylene, having a first melting point and 10% to 60% of a second component, wherein said second component comprises a polyolefin having a melting point lower than the first melting point, but above 100Â° C., and further wherein the monolayer film has been biaxially stretched to a stretch area ratio of at least 36:1, such that when the monolayer film is tested according to the Puncture Testâ€”2.54 cm, said backing has a puncture energy of up to 20 J/cm2 and a puncture elongation of up to 1.3 cm.