PEN (Polyethylene Naphthalate)
Polyethylene Naphthalate — a semi-crystalline polyester similar to PET but with naphthalene ring replacing the benzene ring in the backbone. Tg ~120°C (vs PET 75°C), dramatically improved gas barrier (5× better O₂ barrier than PET), UV resistance, and dimensional stability. Melting point 270°C. More expensive than PET, used where thermal or barrier performance justifies cost. Primary applications: high-performance films for flexible electronics/OLED substrates (Teonex Q65), capacitor films, refillable hot-fill beverage bottles, high-barrier food packaging, specialty magnetic tape, microwaveable containers. Dominant producer: Teijin.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| ISO 1043 | INT | PEN | — | REF | |
| 🇺🇸 | ASTM D6283 | USA | PEN | — | 100% |
Mechanical properties — Pro
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Film, Biaxially Oriented
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