Cast stretch film of interpolymer compositions

摘要

This invention relates to cast films prepared from interpolymer compositions comprising; (A) a substantially linear ethylene/alpha-olefin interpolymer present in the composition in an amount of from about 10 to about 100% by weight based on the combined weight of Components A and B; and (B) a heterogeneous interpolymer present in the composition in an amount of from about 0 to about 90% by weight based on the combined weight of Components A and B; and wherein said interpolymer composition has an I10/I2 value of < about 10.0 and is characterized as having a viscosity at 100 rad/s and a relaxation time (tau) which satisfies either of the following relationships; Log(viscosity at 100 rad/s)<=4.43-0.8 log(I2) or log(tau)>-1.2-1.3*log(I2) The interpolymer compositions are useful in cast stretch film manufacture with the resulting cast films having an excellent balance of strength and processability.