Abstract: A pack of articles (2) packaged using a plastic material film (3) having a preferred direction of tearing (D), a plurality of articles (2) being disposed side by side in one or more superposed layers, the film being folded over along a winding direction (E) around the articles which it retains, opening means being provided on the film to facilitate the tearing thereof. The means for opening the film (3) comprise a continuous zone of weakening (A), which zone is oriented transversely to the preferred direction of tearing (D), and forming a band (6) which surrounds the pack, this zone of weakening (A) having a mechanical strength which is sufficiently high to bear the traction stresses exerted on the film to retain the articles, but sufficiently low to permit opening of the film, without a tool, at any point whatsoever of the zone.

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.