Patent ID: 11969978
Assignee: SK MICROWORKS CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C | IPC B

Claim 0:
1. A film, comprising:
an elastic layer,
wherein the elastic layer has a storage modulus index KSM of 20 to 350 Mpa represented by Equation 1 below, and
wherein the elastic layer has a haze of 3% or less;, K
      SM
     
     =
     
      
       (
       
        
         
          SM
          
           -
           40
          
         
         ×
         
          SM
          80
         
        
        
         SM
         20
        
       
       )
      
      -
      
       SM
       80
      
     
    
   
   
    
     [
     
      Equation
      ⁢
         
      1
     
     ]
    
   
  
 

where SM−40 is a storage modulus (Mpa) measured at a temperature of −40° C., SM80 is a storage modulus (Mpa) measured at a temperature of 80° C., and SM20 is a storage modulus (Mpa) measured at a temperature of 20° C.,
wherein the elastic layer comprises a polymer which has an amide residue as a repeating unit,
wherein a low temperature storage modulus ratio R-40/20 is a ratio of the storage modulus at −40° C. based on the storage modulus at 20° C. and the low temperature storage modulus ratio R-40/20 of the elastic layer is 1.33 or more, and
wherein the storage modulus of the elastic layer at −40° C. is 2000 Mpa or less.