the development of my country’s pen industry is relatively backward. it is expected that large-scale production of pen products will not be achieved until ten years later.
polyethylene naphthalate (pen) is a special engineering rubber material with the advantages of ultraviolet resistance, high gas barrier capability, corrosion resistance, physical and mechanical properties, etc. pen is a product produced by the polycondensation of ndc or nda and ethylene glycol (eg). the performance of rubber pet is better and has a wider range of…
