Patent ID: 9388306
Filing Date: 2016-07-12
CPC Classification: B32B,C08J,C08L,Y10T

Claim Text:
1. A cast film comprising greater than 70 wt %, based on the weight of the cast film, of a core layer comprising a core composition comprising: (a) 50 to 99 wt % linear low density polyethylene based on the weight of the core composition; and (b) 1 to 50 wt % propylene-α-olefin copolymer based on the weight of the core composition, wherein the propylene-α-olefin copolymer comprises from 5 to 35 wt % of units derived from ethylene, less than or equal to 5 wt % of units derived from diene, with the balance being units derived from propylene, based on the total weight of the propylene-α-olefin copolymer, and wherein the propylene-α-olefin copolymer possesses: wherein the cast film is formed by using casting techniques, and has a MD gloss measured at a 45° angle of from about 89 to about 95 and a TD gloss measured at a 45° angle of from about 89 to about 95; and wherein a 20.3 μm thick cast film comprising the core composition possesses a strain hardening value at 2000 psi (13.78 MPa) of greater than 2% greater than the strain hardening value at 2000 psi of a 20.3 μm thick cast film comprising a core layer comprising a core composition consisting of only the linear low density polyethylene.