Resin, Flame Retardant and Additives

Polyethylene Naphthalate (PEN) Resin Teonex®

Polyethylene naphthalate (PEN) resin became popular in various fields after 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 drugs, and still steadily increasing the area of applications. Teonex® is a 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), a typical polyester. The property of Teonex® is considered superior to that of PET. Teonex® is crystalline resin, crystallized slowly, making it easier to shape transparent molded products. Teonex® has a superior chemical and scratch resistance compared to polycarbonate (PC) resin, a typical resin used in transparent molded products.


  1. 1.High transparency.
  2. 2.+50℃ of thermal resistance compared to PET.
  3. 3.Higher hydrolysis resistance and longer life than PET.
  4. 4.Higher chemical resistance than PET and PC.
  5. 5.Reduces the concern for contamination thanks to low levels of outgassing and adsorption of organic materials.
  6. 6.Absorbs ultraviolet radiation (up to 383nm) and protects contents inside.

Usage examples for application fields

  • Returnable bottles
  • Cosmetic containers
  • Plateware
  • Medical product containers
  • Blending materials to improve PET performance (moisture barrier, gas barrier, heat resistance, UV ray absorption, etc.)
  • Components that requires transparency, heat resistance, or chemical resistance