The novel PEN film has been introduced abroad

A new film called "Kaladex" has been successfully developed abroad. It is made from polyethylene naphthalate (PEN) after biaxial stretching. Its biggest feature is to make up for the heat of PET film. Insufficient performance. The glass transition temperature of PET is 78°C, while PEN is as high as 120°C. The shrinkage of the PET film at a temperature of 150°C after 5 minutes is 0.5%, whereas the shrinkage of PEN at 190°C is 0.5%. The strength of PEN is greatly increased compared with PET. For example, the tensile modulus of PEN film reaches 6000MPa, which is 25% higher than that of PET, and the tensile strength is increased by 10% to reach 220MPa. PEN's gas barrier performance is 4 times higher than that of PET. good. The application in packaging has good prospects.