Teonex®
Polyethylene naphthalate resin (PEN resin)

What is Teonex

Polyethylene-naphthalate (PEN) resin has become popular in various fields, since U.S. company Amoco Chemicals started commercial production of naphthalenedicarboxylic acid (NDC) , a raw material of PEN, in 1995. In 1964, 31 years before that, Teijin started development of PEN and commercialized as Teonex. Since then, Teonex has been popular as a functional material for industrial parts and wrapping materials for food and drug, and still steadily increasing the area of application. Teonex is crystalline thermoplastic polyester, a polycondensate of NDC as an acid component and ethylene glycol as a glycol component, manufactured in a process similar to that of polyethylene terephthalate (PET), typical polyester. The property of Teonex is, however, considered superior to that of PET. Teonex is crystalline resin, but slow in crystallization; therefore, it becomes easier for you to shape transparent molded products. Compared with polycarbonate (PC) resin, a typical resin used in transparent molded product, Teonex has superior chemical and scratch resistance; therefore, it enables manufacturing of higher quality product.

<Special features of TEONEX>

①High degree of transparency.
②+50℃ of thermal resistance, compared with PET.
③Higher hydrolysis resistance and longer life than PET.
④Higher chemical resistance than PET and PC.
⑤Low level of outgassing and adsorption of organic materials, which reduce concern for contamination.
⑥Absorb the ultraviolet radiation(up to 383nm)and protect the contents inside.

Examples of application field

  • Returnable bottle
  • Cosmetic container
  • Plateware
  • Medical product container
  • Blending material for improving PET performance (moisture barrier, gas barrier, heat resistance, UV ray absorption, etc.)
  • Components that requires transparency, heat resistance, or chemical resistance