Heat sealable blend of very low density polyethylene or plastomer with polypropylene based polymers and heat sealable film and articles made thereof

A film or sheet having a seal initiation temperature below about 100.degree. C. said film or sheet comprising:

• (a) from about 30 to about 70 weight percent of a low melting polymer comprising an ethylene-alpha-olefin copolymer having a density of from about 0.88 g/cm.sup.3 to about g/cm.sup.3, a melt index of from about 1.5 dg/min to about 7.5 dg/min, a molecular weight distribution less than about 3.0, essentially a single peak melting point of between about 60.degree. C. to about 100.degree. C., and a composition breadth index greater than about 70 percent;
• and,
• (b) from about 70 to about 30 weight percent of a propylene based polymer having from about 88 mole percent to about 100 mole percent propylene and from about 12 mole percent to about 0 mole percent of an alpha-olefin other than propylene.

A multiple layer heat sealable film having a seal initiation temperature below about 100.degree. C. comprising at least one base layer and at least one heat sealable layer, the heat sealable layer comprising:

• (a) from about 30 to about 70 weight percent of a low melting polymer comprising an ethylene-alpha-olefin copolymer having a density of from about 0.88 g/cm.sup.3 to about 0.915 g/cm.sup.3, a melt index of from about 1.5 dg/min to about 7.5 dg/min, a molecular weight distribution less than about 3.0, essentially a single peak melting point of between about 60.degree. C. to about 100.degree. C., and a composition breadth index greater than about 70 percent;
• and,
• (b) from about 70 to about 30 weight percent of a propylene based polymer having from about 88 mole percent to about 100 mole percent propylene and from about 12 mole percent to about 0 mole percent of an alpha-olefin other than propylene.

The heat sealable film of claim 13 wherein the base layer is a polypropylene.