Patent ID: 7943219
Filing Date: 2011-05-17
Classification: B29C,B29K,B29L,B32B,C08J,C08L,Y10T

Abstract:
1. A film, comprising: a first elastomeric polymer; and a second polymer having a plurality of crystallites and one of crystalline and semicrystalline properties, wherein the second polymer forms crystalline regions disposed in the first polymer, and the film exhibits a reversible non-linear reduction in opacity as the composition is stretched from a first length where a first spacing between the crystallites diffracts light such that the film is substantially opaque to a second length where a second spacing between the crystallites allows light to pass through the film such that the film is substantially transparent, wherein the crystallites are spaced farther apart in the second spacing than in the first spacing, wherein the reversible non-linear reduction in opacity comprises a first rate of opacity reduction and a second rate of opacity reduction, wherein the second rate of opacity reduction is at least about 2 times greater than the first rate of opacity reduction.