Abstract: Disclosed in part is a composition comprising one or more propylene-?-olefin copolymer(s) comprising propylene-derived units and from 5 to 35 wt % (by weight of the propylene-?-olefin copolymer) of ethylene-derived units and/or C4 to C10 ?-olefin-derived units, and having a Mooney viscosity [ML (1+4) @ 125° C.] as determined according to ASTM D1646, of less than 50, and a Hf of less than 75 J/g; and one or more ethylene-ester copolymer(s). The composition is suitable for an elastic film, and in particular suitable for a two or more layered film wherein the skin (outer) layer also includes anti-block and slip agents.

Abstract: Disclosed in part is a composition comprising one or more propylene-?-olefin copolymer(s) comprising propylene-derived units and from 5 to 35 wt % (by weight of the propylene-?-olefin copolymer) of ethylene-derived units and/or C4 to C10 ?-olefin-derived units, and having a Mooney viscosity [ML (1+4) @ 125° C.] as determined according to ASTM D1646, of less than 50, and a Hf of less than 75 J/g; and one or more ethylene-ester copolymer(s). The composition is suitable for an elastic film, and in particular suitable for a two or more layered film wherein the skin (outer) layer also includes anti-block and slip agents.

Abstract: A film comprising at least one layer which comprises a propylene-alpha-olefin copolymer, greater than or equal to 0.10 wt % of a first modifier, and greater than or equal to 0.50 wt % of a second modifier, based on the weight of the layer. The propylene-alpha-olefin copolymer comprises propylene-derived units and from 5 to 35 wt %, based on the weight of the copolymer, of units derived from ethylene and/or C4 to C10 alpha-olefins. The first modifier comprises a first unsaturated amide-containing slip agent. The second modifier is selected from: i) a second unsaturated amide-containing slip-agent, which may be the same or different than the first unsaturated amide-containing slip-agent; ii) a saturated amide-containing slip agent; iii) an antiblock; and iv) a mixture of any two or more of i, ii, and iii. The film exhibits reduced tackiness and reduced roll blocking.

Abstract: A porous membrane is provided by biaxially stretching a film of high density polyethylene (HDPE), including particles of an incompatible material. This film has a meshed network of HDPE fibers and striations of layers coplanar with the plane of the film. This film is porous in a direction perpendicular to the plane of the film and has a void content of at least 20%. The porous membrane may have one or more nonporous backing layers. The membrane may be used as filter or battery separator.