Patent ID: 9366789
Filing Date: 2016-06-14
CPC Classification: G02B,Y10T

Claim Text:
1. A retroreflective article, comprising: a plurality of cube corner elements; and a multi-layer sealing film at least a portion of which is adhered to at least some of the plurality of cube corner elements such that the multi-layer sealing film maintains an air interface between the cube corner elements and the multi-layer sealing film, wherein the multi-layer sealing film includes: a first sealing film layer comprising a thermoplastic polymeric material including reaction products of alkylene in an amount of at least about 50% by weight and reaction products of at least one non-acidic comonomer in an amount of less than about 25% by weight; and a second sealing film layer including at least one of a polypropylene and high density polyethylene; wherein at least one of the first sealing film layer and the second sealing film layer has an elastic modulus that is between about 3.5×10