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

Claim 0:
1. A polymer film, which comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin, and which has a haze (HZ0) of 3% or less before autoclave treatment and a ΔHZ24 value represented by the following Equation 1a of 500% or less:, Δ
       ⁢
       
        
         HZ
         
          2
          ⁢
          4
         
        
        (
        %
        )
       
      
      =
      
       
        
         
          ❘
          "\[LeftBracketingBar]"
         
         
          
           HZ
           
            2
            ⁢
            4
           
          
          -
          
           H
           ⁢
           
            Z
            0
           
          
         
         
          ❘
          "\[RightBracketingBar]"
         
        
        
         H
         ⁢
         
          Z
          0
         
        
       
       ×
       1
       ⁢
       0
       ⁢
       0
      
     
     ,
    
   
   
    
     Equation
     ⁢
        
     la
    
   
  
 

wherein in Equation 1a,
HZ0 refers to the haze before the film is treated in an autoclave, and
HZ24 refers to the haze 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 24 hours,
wherein a content of a residual solvent in the film is 1,200 ppm or less, and
wherein an IS value represented by the following Equation 7 is 5 to 160:, IS
        =
        
          
            I
            ⁢
            M
          
          +
          
            
              R
              ⁢
              S
            
            
              1
              ⁢
              0
            
          
        
      
    
    
      
        [
        
          Equation
          ⁢
          
            
          
          ⁢
          7
        
        ]
      
    
  

wherein in Equation 7, IM stands for the number of moles of imide repeat units when the total number of moles of the imide repeat units and amide repeat units in the film is 100; and RS stands for the content (ppm) of a residual solvent in the film.