Patent ID: 8080310

Claim:
A method of making a multilayer, heat-shrinkable film, comprising: a. extruding a bulk layer; b. coextruding a plurality of microlayers to form a microlayer section; c. merging said bulk layer and said microlayer section to form a multilayer film; and d. stretch-orienting said multilayer film under conditions that impart heat-shrinkability to said film; wherein, each of said microlayers and said bulk layer have a thickness, the ratio of the thickness of any of said microlayers to the thickness of said bulk layer ranging from about 1:2 to about 1:40; and wherein, said film has a total free shrink (ASTM D2732-03) of at least about 10% at 200° F., and an Elmendorf Tear value (ASTM D1922-06a) of at least 10 grams, as measured in at least one direction along a length or width dimension of said film.