Optical bodies and method of making optical bodies including acrylate blend layers

Abstract

A multilayer optical body is disclosed. The optical body includes an optical film including polyester, a first skin layer is disposed on at least one side of the polyester optical film, and a strippable skin layer is disposed on the first skin layer. In some embodiments, the first skin layer includes a mixture of a polyacrylate and a second polymer. Methods of making such optical bodies are also disclosed.

1 . An optical body, comprising: 
 a optical film comprising polyester;    a first extruded skin layer disposed on a first side of the optical film, the extruded skin layer comprising a mixture of a polyacrylate and a second polymer; and    a first extruded strippable skin layer disposed on the first extruded skin layer.    
   
   
       2 . An optical body according to  claim 1 , wherein the optical body comprises a second extruded skin layer comprising polyacrylate disposed on a second side of the optical film and a second extruded strippable skin layer disposed on the second extruded skin layer.  
   
   
       3 . An optical body according to  claim 1 , wherein the second polymer is miscible in the polyacrylate.  
   
   
       4 . An optical body according to  claim 1 , wherein the second polymer is not miscible in the polyacrylate and the second polymer has a refractive index in a range from 1.45 to 1.53.  
   
   
       5 . An optical body according to  claim 1 , wherein the optical film comprises an oriented multilayer optical film.  
   
   
       6 . An optical body according to  claim 1 , wherein the optical film comprises a PET or coPET.  
   
   
       7 . An optical body according to  claim 1 , wherein the optical film comprises a PEN or coPEN.  
   
   
       7 . An optical body according to  claim 6 , wherein the first extruded skin layer comprises coPMMA.  
   
   
       8 . An optical body according to  claim 7 , wherein the first extruded skin layer comprises PMMA.  
   
   
       9 . The optical body of  claim 1 , wherein the first extruded skin layer second polymer comprises an anti-static polymer.  
   
   
       10 . The optical body of  claim 1 , wherein the first extruded strippable skin layer comprises a polyolefin.  
   
   
       11 . The optical body of  claim 1 , wherein the first extruded strippable skin layer comprises a rough strippable skin layer comprising a continuous phase and a disperse phase.  
   
   
       12 . The optical body of  claim 1 , wherein the first extruded skin layer further comprises an UV absorber.  
   
   
       13 . The optical body of  claim 1 , wherein the first extruded skin layer further comprises an UV absorber and a hindered amine light stabilizer.  
   
   
       14 . The optical body of  claim 1 , wherein the first extruded skin layer second polymer comprises PVDF.  
   
   
       15 . A method of making an optical body comprising; disposing a first skin layer comprising a mixture of a polyacrylate and a second polymer and a first strippable skin layer on an optical layer comprising polyester, wherein the first skin layer is disposed between the optical layer and the first strippable skin layer.  
   
   
       16 . A method according to  claim 15 , wherein the disposing step comprises coextruding the optical layer with a first skin layer comprising a polyacrylate and a second polymer, a second skin layer comprising polyacrylate, a first strippable skin layer and a second strippable skin layer, wherein the optical layer is disposed between the first skin layer and the second skin layer, and the first skin layer is disposed between the optical layer and the first strippable skin layer, and the second skin layer is disposed between the optical layer and the second strippable skin layer.  
   
   
       17 . A method according to  claim 15 , further comprising biaxially orienting the optical film.  
   
   
       18 . A method according to  claim 15 , ether comprising substantially uniaxially orienting the optical film.  
   
   
       19 . A method according to  claim 15 , wherein the disposing step comprises coextruding an optical layer comprising PET or coPET with a first skin layer comprising a mixture of coPMMA and an anti-static polymer and a first strippable skin layer comprising polypropylene, wherein the first skin layer is disposed between the optical layer and the first strippable skin layer.  
   
   
       20 . A method according to  claim 15 , wherein the disposing step comprises coextruding an optical layer comprising PEN or coPEN with a first skin layer comprising a mixture of PMMA and an anti-static polymer and a first strippable skin layer comprising polypropylene, wherein the first skin layer is disposed between the optical layer and the first strippable skin layer.  
   
   
       21 . A method according to  claim 15 , wherein the disposing step comprises coextruding an optical layer comprising polyester with a first skin comprising a mixture of a polyacrylate and a second polymer, and a first rough strippable skin layer, wherein the first skin layer is disposed between the optical layer and the first rough strippable skin layer to form an optical film and the rough strippable skin layer comprises a continuous phase and a disperse phase.  
   
   
       22 . A method according to  claim 15 , further comprising removing at least one of the first and second strippable skin layers from the first skin layer or the second skin layer.