JPWO2021070143A5 - - Google Patents

Claims (3)

A film, the following layers in the following order:
a) a first (meth)acrylate layer comprising one or more polymers having a glass transition temperature Tg of 80°C or less;
b) a first bonding layer comprising a copolymer of polyethylene terephthalate having an average refractive index of 1.50 to 1.61 and having a thickness of 0.1 mil to 1 mil;
c) of polyethylene terephthalate having an in-plane refractive index of 1.60 to 1.72 in at least one direction (x or y, or both directions) and an out-of-plane refractive index (z-direction) of 1.47 to 1.55. a core layer comprising a homopolymer or copolymer;
d) a second bonding layer comprising a copolymer of polyethylene terephthalate having an average refractive index of 1.50 to 1.61 and having a thickness of 0.1 mil to 1 mil;
including;
Each layer is directly adjacent to the next layer,
A film, wherein said film is coextruded and biaxially oriented. A retroreflective film comprising the film of claim 1 , comprising a prismatic layer. 3. The film of claim 1 or 2 , further comprising a printed layer directly adjacent the first (meth)acrylate layer and directly adjacent the first tie layer.