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NEW DuPont™ Zytel® halogen free grade offers enhanced thermal ageing

In response to health, safety and sustainability needs – primarily for electrical applications such as contactors, circuit breakers and housings – DuPont Performance Polymers has extended its portfolio of halogen-free* materials, with a new flame-retardant (FR) nylon 66 with enhanced thermal ageing.

"In a comparative test carried out on ISO tensile bars according to ISO 527 in DuPont’s European Technical Center in Geneva, Switzerland, data showed that our halogen-free nylon 66, DuPont™ Zytel® FR95G25V0NH, retains 80 percent of its tensile strength when exposed to 200 °C for more than 1,000 hours, while incumbent materials only retain 50 percent," said Antonio Nerone, global segment leader electric & connectors.

Graphic: DuPont
Contactors, circuit breakers and housing molded from non-halogenated Zytel® PA66 and Zytel® HTN meet demanding requirements for low environmental impact, high-temperature assembly and reliable service.

The new Zytel® FR grade uses a patented combination of flame-retardant copolymer and stabilizer to improve melt stability, flow and surface appearance and reduce mold deposit. The new material also offers a Comparative Tracking Index (CTI) rating of 600V. This rating is given to polymeric materials to compare their resistance to carbon tracking and is determined by test methods defined by IEC 112 or UL 746C. The CTI value is subsequently used for electrical safety assessments of electrical apparatus. Applications that can take advantage of this level of performance will typically include the insulating elements and housings for circuit breakers, contactors, transformers and motors.

DuPont has been undertaking significant amounts of research and development to give the market what it needs without compromising performance and this new Zytel® FR is a good example of DuPont listening to market needs and developing a solution.

The electrical industry is seeking alternatives to the use of halogens as flame retardants for health, safety and recycling reasons. It also has to consider the WEEE (Waste Electrical and Electronic Equipment) Directive, which requires the separation of halogen-containing materials.

DuPont is constantly evolving its range of halogen-free products and is also working on the development of halogen-free DuPont™ Crastin® PBT, DuPont™ Rynite® PET, DuPont™ Hytrel® TPC-ET and Zytel® HTN, all of which have been developed to address industry requirements.

*Halogen-free when used herein means that halogen is not an intended ingredient of our product.

DuPont Performance Polymers is committed to working with customers throughout the world to develop new products, components and systems that help reduce dependence on fossil fuels and protect people and the environment. With more than 40 manufacturing, development and research centers throughout the world, DuPont Performance Polymers uses the industry’s broadest portfolio of plastics, elastomers, renewably sourced polymers, filaments and high-performance parts and shapes to deliver cost-effective solutions to customers in aerospace, automotive, consumer, electrical, electronic, industrial, sporting goods and other diversified industries.

DuPont (NYSE: DD) has been bringing world-class science and engineering to the global marketplace in the form of innovative products, materials, and services since 1802. The company believes that by collaborating with customers, governments, NGOs, and thought leaders we can help find solutions to such global challenges as providing enough healthy food for people everywhere, decreasing dependence on fossil fuels, and protecting life and the environment. For additional information about DuPont and its commitment to inclusive innovation, please visit

The DuPont Oval Logo, DuPont(TM), The miracles of science(TM) and all product names denoted with ® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company or its affiliates.

DuPont press contact
Rémi Daneyrole
Tel.: +41 (0)22 717 54 19
Fax: +41 (0)22 580 22 45

Rémi Daneyrole | DuPont
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