Patent ID: 8012572
Filing Date: 2011-09-06
Classification: B29C,B29L,B32B,Y10T

Abstract:
1. A multilayer, heat-shrinkable film, comprising: a. a bulk layer; and b. a microlayer section comprising a plurality of microlayers; 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; wherein said microlayers each have a thickness ranging from about 0.001 to 0.015 mil, and said bulk layer has a thickness ranging from about 0.03 to 0.5 mil; wherein each microlayer comprises one or more of ethylene/alpha-olefin copolymer, ethylene/vinyl acetate copolymer, polypropylene homopolymer or copolymer, ethylene/methacrylic acid copolymer, maleic-anhydride-grafted polyethylene, polyamide, or low density polyethylene; wherein, said heat-shrinkable film has a thickness of less than about 0.7 mil 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; and wherein said film has an orientation ratio of at least 4, as measured in at least one direction along a length or width dimension of said film.