Peelable closure for container

A cold-durable, heat-resistant, peelable film for packaging a food product, comprising

• (a) a sealant layer and
• (b) a protective layer, wherein
• i) the sealant layer is a polypropylene-based monolayer polyolefin layer comprising polypropylene blended with at least one polyethylene polymer resin selected from the group consisting of an ethylene/octene copolymer, linear low density polyethylene, low density polyethylene, high density polyethylene, ethylene vinyl acetate, and ethylene methyl acrylate, or a polypropylene-based multilayer polyolefin film comprising an inner heat sealable sub-layer comprising polypropylene blended with at least two different polyethylene polymer resins each selected from the group consisting of an ethylene/octene copolymer, linear low density polyethylene, low density polyethylene, high density polyethylene, ethylene vinyl acetate, and ethylene methyl acrylate,
• ii) the sealant layer does not fracture when exposed to a temperature in a range of about −20° C. to about 0° C.,
• iii) the sealant layer does not melt or burst when exposed to a temperature of up to about 105° C.,
• iv) the sealant layer is adapted to be peeled from a polypropylene substrate either before or after heating with a peel force in a range of about 1 lbf/in to about 5 lbf/in,
• v) the protective layer is included as part of the sealant layer when the sealant layer is the polypropylene-based multilayer polyolefin film, and
• wherein the sealant layer is adapted to form a closure with the polypropylene substrate and to peel away easily so that the closure remains in one piece upon separation from the polypropylene substrate and wherein the inner heat sealable sub-layer is in contact with the polypropylene substrate when the sealant layer is the polypropylene-based multilayer film.