Multiple Insulation choices for Litz Wire

July 14, 2025

At Ruiyuan, we consistently deliver innovative solutions because client-focused innovation is at our core.

Over the past year, we've received numerous inquiries from customers seeking expanded insulation material options that combine stable quality, enhanced temperature/voltage resistance, environmental sustainability, and cost efficiency.

In response to evolving EU regulations, we introduced TPEE (Thermoplastic Polyester Elastomer) last year - an optimal solution that complies with the PFAS (per- and polyfluoroalkyl substances) restriction affecting approximately 10,000 compounds.

For other regional requirements, we offer four additional advanced materials that have undergone rigorous testing and demonstrated market success, though they represent newer applications in magnet litz wire manufacturing. Notably, we've been utilizing ETFE since 2019 with proven results.

To assist in selecting the most suitable material for your specific needs, we've outlined the key characteristics below. Our technical team stands ready to provide personalized consultation and support.

Property/Material	PTFE (Polytetrafluoroethylene)	ETFE (Ethylene Tetrafluoroethylene Copolymer)	FEP (Fluorinated Ethylene Propylene Copolymer)	PFA (Perfluoroalkoxy Alkane)	PVDF (Polyvinylidene Fluoride)
Chemical Resistance	Excellent	Very Good	Very Good	Excellent	Good
Temperature Resistance	-260°C to 260°C	-200°C to 150°C	-200°C to 200°C	-200°C to 260°C	-40°C to 150°C
Mechanical Properties	High brittleness Moderate toughness	Good toughness High strength	Good toughness	Good toughness High strength	High strength Good toughness
Processability	Poor, cannot be melt-processed, unsuitable for injection molding	Good, weldable	Suitable for injection molding, extrusion and blow molding	Melt-processable (injection molding, extrusion)	Extrudable, injection moldable, solution coatable
Transparency	Opaque	High	High	Low to medium	Medium to high
Non-stick Properties	Excellent	Good	Good	Excellent	Good
Electrical Properties	Excellent	Excellent	Excellent	Excellent	Good
Main Applications	Cookware coatings, seals, wire insulation	Membrane structures, chemical containers, semiconductors	Wire and cable, chemical equipment linings	Semiconductors, food processing, chemical containers	Water pipes, battery separators, anti-corrosion coatings

And welcome to contact us for more options, and talk with our engineer with some technical questions.