Kaladex® PEN Film

Kaladex® is DuPont Teijin Films’ high-performance polyethylene naphthalate (PEN) film—positioned between standard PET films like Mylar® and premium engineering films.

Key Properties & Advantages

• High thermal tolerance: Glass transition ~121 °C; operational up to 160–180 °C.
• Mechanical strength: Tensile strength ~245 MPa; modulus ~6.7 GPa.
• Dimensional stability: Shrinkage ~0.6% at 150 °C.
• Aging & moisture resistance: Far better hydrolysis resistance than PET (7,000 h vs 1,000 h).
• Electrical insulation: Excellent dielectric strength, low permeability.

Applications

• Electrical & electronics: insulation, capacitors, flexible printed circuits, speaker voice coils.
• Automotive & energy: battery insulation, EV components, fuel cells.
• Aerospace & industrial: belts, films for harsh environments, packaging.

Summary Table

Property	Value / Characteristic
Material	Polyethylene Naphthalate (PEN)
Thermal Stability	~121 °C Tg; 160–180 °C operational
Mechanical Strength	Tensile ~245 MPa; Modulus ~6.7 GPa
Dimensional Stability	~0.6% shrinkage at 150 °C
Aging & Moisture	Excellent resistance vs PET
Electrical Insulation	High dielectric strength, low permeability
Common Uses	Electronics, EV, aerospace, packaging, high-temp parts

Bottom line: Kaladex® delivers a serious upgrade over PET films—tougher, more heat-resistant, and durable—while offering a cost-effective option before moving to ultra-premium films like polyimide or PEEK.