Abstract: Heat-shrinkable coextrudate thermoplastic film packaging materials, well suited for the packaging of any one or more of a wide variety of articles, e.g., canned goods, and readily torn in a transverse direction substantially perpendicular to the machine direction thereof, e.g., by the provision of a tab or pull member thereon, are shaped from(a) at least one layer of a polyolefin; and(b) at least one layer of a copolymer selected from among ionic copolymers of:(1) .alpha.-olefins of the formula R--CH.dbd.CH.sub.2 wherein R is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, with(2) .alpha., .beta.-ethylenically unsaturated carboxylic acids having from 3 to 8 carbon atoms, and(3) optionally, an additional monoethylenically unsaturated comonomer; with the proviso that from 10% to 90% of the carboxylic acid functions of such copolymer are ionized by neutralization by means of metallic ions distributed over the copolymer.

Abstract: Heat-shrinkable coextrudate thermoplastic film packaging materials, well suited for the packaging of any one or more of a wide variety of articles, e.g., canned goods, and readily torn in a transverse direction substantially perpendicular to the machine direction thereof, include (a) at least one layer of a polyolefin; and (b) at least one layer of an ionic copolymer which comprises the copolymerizate of (1) an .alpha.-olefin of formula R--CH.dbd.CH.sub.2 wherein R is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, with (2) an .alpha.,.beta.