Patent ID: 11970613
Assignee: SK MICROWORKS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 8:
9. The polymer film of claim 7, which has a ΔTS72 value represented by the following Equation 4b of 30% or less:, Δ
          ⁢
          T
          ⁢
          
            
              S
              72
            
            ⁡
            
              (
              %
              )
            
          
        
        =
        
          
            
              
              
                
                  TS
                  72
                
                -
                
                  TS
                  0
                
              
              
            
            
              T
              ⁢
              
                S
                0
              
            
          
          ×
          1
          ⁢
          0
          ⁢
          0
        
      
    
    
      
        [
        
          Equation
          ⁢
          
            
          
          ⁢
          4
          ⁢
          b
        
        ]
      
    
  

wherein in Equation 4b,
TS0 refers to the modulus before the film is treated in an autoclave,
TS72 refers to the modulus after the film is treated in an autoclave, and the autoclave treatment means that an autoclave is filled with water and a film is treated therein at a temperature of 120° C. and a pressure of 1.2 atm for 72 hours.