Matte Multi-Layer Films Having Improved Sealing Properties

A multi-layer structure, comprising:

• (a) an oriented multi-layer polymeric film, comprising:
• (i) a heat sealable skin layer comprising an incompatible polymer blend, wherein the incompatible polymer blend comprises 80.0 to 95.0 wt % of a matte resin comprising HDPE and an ethylene-propylene-butylene terpolymer, and 5.0 to 20.0 wt % of a propylene-ethylene elastomer, wherein the propylene-ethylene elastomer has density ≦0.880 g/cm3, a Vicat softening temperature of 50.0° C. to 85.0° C. and comprises 6.0 to 18.0 wt %, polymer units derived from ethylene and <1.0 wt % polymer units derived from monomers other than propylene and ethylene, wherein the heat sealable skin layer has a Haze ≧45.0% and a 45° Gloss <20.0;
• (ii) a core layer comprising a polypropylene homopolymer or mini-random copolymer in surface contact with the heat sealable skin layer;
• (b) optionally, a substrate in surface contact with the multi-layer polymeric film.

A multi-layer structure, comprising:

• (a) an oriented multi-layer polymeric film, comprising:
• (i) a heat sealable skin layer comprising an incompatible polymer blend, wherein the incompatible polymer blend comprises 80.0 to 95.0 wt % of a matte resin comprising HDPE and an ethylene-propylene-butylene terpolymer, and 5.0 to 20.0 wt % of a ethylene-butylene elastomer, having a density ≦0.880 g/cm3, a Vicat softening temperature 50° C. to 85° C. and comprises <1.0 wt % polymer units derived from monomers other than ethylene and butene, wherein the heat sealable skin layer has a Haze ≧45.0% and a 45° Gloss <20.0;
• (ii) a core layer comprising a polypropylene homopolymer or mini-random copolymer in surface contact with the heat sealable layer;
• (b) optionally, a substrate in surface contact with the multi-layer polymeric film.

A method of making a heat sealable multi-layer structure, the method comprising:

• a) coextruding a multi-layer polymeric film comprising i) a heat sealable skin layer comprising a matte resin composition and 0.5 to <50.0 wt % of a propylene- or ethylene-based elastomer;
• and ii) core layer comprising a polypropylene homopolymer or mini-random copolymer;
• b) orienting the multi-layer polymeric film in the machine and/or transverse direction;
• and
• c) optionally, laminating a substrate to a side of the multi-layer polymeric film opposite the heat sealable skin layer.