Patent ID: 6812289
Filing Date: 2004-11-02
Classification: B32B,Y10S

Abstract:
A cast stretch film comprising an interpolymer composition which further comprises:(A) a substantially linear ethylene/&agr;-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, the substantially linear interpolymer having a density of from about 0.860 to about 0.925 g/cm3, a melt index (I2) of from about 0.2 to about 7.0 g/10 min, an I10/I2&gE;5.63, and is an interpolymer of ethylene with at least one C3-C20 &agr;-olefin; 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, the heterogeneous polymer having a density of from about 0.895 to about 0.955 g/cm3, a melt index (I2) of from about 0.2 to about 500 g/10 min.; and wherein said interpolymer composition has a density of from about 0.910 to about 0.922 g/cm3, a melt index (I2) of from about 2.0 to about 6.0 g/10 min and an I10/I2 of less than about 10.0 and a molecular weight distribution which conforms to the relationship Mw/Mn&lE;3 and is characterized as having a viscosity at 100 rad/s and a relaxation time (&tgr;) which satisfies either of the following relationships at 190Â° C.; Log(viscosity at 100 rad/s)&lE;4.43âˆ’0.8 log(I2) orlog(&tgr;)>âˆ’1.2âˆ’1.3*Ã—log(I2).