Cast stretch film of interpolymer compositions

   
   

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 I.sub.10 /I.sub.2 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).ltoreq.4.43-0.8 log(I.sub.2) or log(.tau.)>-1.2-1.3* log(I.sub.2) The interpolymer compositions are useful in cast stretch film manufacture with the resulting cast films having an excellent balance of strength and processability.

Questa invenzione riguarda le pellicole fuse preparate dal contenere delle composizioni nel interpolymer; (A) un interpolymer sostanzialmente lineare di ethylene/.alpha.-olefin presente nella composizione in una quantità di circa 10 a circa 100% di peso basato sul peso unito dei componenti A e B; e (B) un interpolymer eterogeneo presente nella composizione in una quantità di circa 0 a circa 90% di peso basato sul peso unito dei componenti A e B; ed in cui la composizione detta nel interpolymer ha un valore di I.sub.10 /I.sub.2 di -1.2-1.3 * log(I.sub.2) le composizioni nel interpolymer sono utili nella fabbricazione della pellicola di stirata del getto con le pellicole fuse risultanti che hanno un equilibrio eccellente di resistenza e del processability.

 
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