The invention discloses a preparation method of a high-definition release film. The material for forming the silicone oil bonding layer is fed into a first extruder, the material for forming the film support layer is fed into a second extruder, and the material for forming the auxiliary winding layer is fed into a third extruder. Melts extruded from the respective extruders are combined at the die lip via a three-chamber die head. Under the action of high-voltage electrostatic adsorption, the composite melt is cooled on a chill roll to form a film sheet to be stretched. The film sheet is fed into a longitudinal stretching roll and stretched in the longitudinal direction to form a base film. The base film is fed into a coating device, where a continuously rotating oil coating roller applies silicone oil to the surface of the online continuously moving base film to form a silicone oil layer. The silicone-coated base film is fed into a transverse stretching machine, preheated and then transversely stretched to obtain a high-definition release film. The invention has the advantage of strong adhesion of silicone oil.
Country Code: CN
Application Number: CN202010493204.9
