Abstract: A heat-sealable multilayer film may include a support layer, a polyethylene heat-seal layer, and an intermediate peelable layer. The support layer may include at least one polymeric layer. Heat-sealed packages comprising the multilayer film described herein have peelable seals characterized by an appropriate peel strength substantially independent of the seal conditions and substantially free of stringing upon peeling.

Abstract: A heat-sealable multilayer film may include a support layer, a polyethylene heat-seal layer, and an intermediate peelable layer. The support layer may include at least one polymeric layer. Heat-sealed packages comprising the multilayer film described herein have peelable seals characterized by an appropriate peel strength substantially independent of the seal conditions and substantially free of stringing upon peeling.

Abstract: Polymeric films having at least one outer layer consisting of a blend of low density polyethylene and a poly-(alkylstyrene) can be heat sealed to non-woven webs such as paper to produce peel openable packages, for example for medical equipment. Such packages can be peeled open with low fiber lift from the non-woven webs.

Abstract: Laminates consisting of a metal foil (2) having an uncoated surface which has been directly heat sealed to the surface (4) of a polymeric web (1) by an outer surface (4) of the web, the outer surface (4) of the web (1) consisting of a blend of an ethylene/vinyl acetate copolymer and an additive which embrittles the copolymer at room temperature. Packages produced by directly heat sealing metal foils (2), preferably aluminum foil, to polymeric webs (1) having the specified outer surface have exhibited peel strengths, for example in the range of from 2 to 6N/15 mm, which enable press through packages to be produced which do not peel open when tablets are pushed through them but will peel when in the form of pouches.

Abstract: Heat sealable polymeric films having a heat sealable surface comprising a blend of at least one polyethylene and a cyclic olefin/ethylene copolymer having a glass transition temperature Tg of greater than 30° C. Such films can be used to form packages showing good peelability, usually with evidence of peeling, after heat sealing to various substrates. These packages are of particular use for packaging foodstuffs and medicaments.

Abstract: Polymeric films having at least one outer layer consisting of a blend of low density polyethylene and a poly-(alkylstyrene) can be heat sealed to non-woven webs such as paper to produce peel openable packages, for example for medical equipment. Such packages can be peeled open with low fiber lift from the non-woven webs.