Paint protection film and method of manufacturing same
Disclosed is a paint protection film having a storage modulus measured at a temperature of n ° C. according to ASTM D4065 of En, where n is a number representing a temperature in degrees Celsius, wherein E40/E20 is 0.75 or more and 1.1 or less, wherein the paint protection film has a change index dYI of yellowness according to ASTM E313 before and after a UV irradiation, represented by Equation 1 below, of 0.8 or less, where the UV irradiation is performed for 72 hours at an output of 3 W with a light having wavelength from 280 nm to 360 nm: dYI=|YI−UV_YI| [Equation 1] in Equation 1, YI is the yellowness of the paint protection film before the UV irradiation, and UV_YI is the yellowness of the paint protection film after the UV irradiation.
1 . A method of manufacturing a paint protection film, the method comprising:
preparing a raw material including a polyether block amide copolymer;
melting and extruding the raw material to form a paint protection sheet; and
preparing a laminate by forming a carrier film laminate by placing the paint protection sheet on a carrier film, passing the carrier film with the paint protection sheet thereon between rollers to compress, and then winding the carrier film laminate,
wherein the carrier film has a tension of 2000 kPa or more and 4200 kPa or less before placing the paint protection sheet on top of the carrier film.
2 . The method of claim 1 , wherein a temperature for the melting is 200° C. to 300° C.
3 . The method of claim 1 , wherein the compressing is performed by passing the carrier film laminate between a plurality of rollers.