Patent ID: 6207754
Filing Date: 2001-03-27
Classification: C08L,Y10T

Abstract:
An article, comprising a layer of at least about 0.005 inch thickness composed of a melt blend of(A) an impact modified polypropylene resin composed of a thermoplastic propylene polymer and an impact modifying olefin elastomer copolymer in proportion with respect one to another to provide a resin having a propylene content of 80 wt. % or greater, a 1% secant modulus of about 60,000 to about 130,000 psi, and a melt flow rate of from about 0.5 to about 5;(B) a plastomer comprising ethylene copolymerized with an alpha-olefin comonomer wherein said plastomer hasan ethylene content of from about 87 to about 97.5 mole %;a density of from about 0.865 to about 0.920 g/cc;a weight average molecular weight (M.sub.w) not less tn 70,000;a M.sub.w /M.sub.n equal to or less than 4.0;a single melting point peak by DSC in the range of 50 to 110.degree. C.; anda 1% secant modulus of less than about 15,000 psi;(C) a discreet cross-linked elastomer comprising from about 20 to about 30 wt. % of said blend;said impact modified polypropylene resin (A) and said plastomer (B) being in proportions with respect one to another to provide a blend composition having a 1% secant modulus of 40,000 psi or less.