2013 Issue 1: Collaboration—The Key To Market Success

Non-halogenated grade of Zytel® FR nylon meets legislation requirements

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.
  

 

In a direct response to demanding industry legislation, we have extended our portfolio of halogen-free* materials with a flame-retardant (FR) DuPont™ Zytel® nylon 66 with enhanced thermal aging.

The electrical industry is seeking alternatives to the use of halogens as flame retardants for health, safety and recycling reasons. Created specifically to address these needs, the non-halogenated material will see widespread use in electrical applications such as the insulating elements and housings for circuit breakers, contactors, transformers and motors. The FR Zytel® grade will also help our customers address the Waste Electrical and Electronic Equipment (WEEE) Directive, which requires the end-of-life separation of halogen-containing materials.

 

This 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. It also offers a Comparative Tracking Index (CTI) rating of 600V. CTI is a rating given to all polymeric materials in order 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.

 

We have undertaken significant amounts of research and development to give the market what it needs without compromising performance. "In a comparative test carried out on ISO tensile bars according to ISO 527 in the DuPont European Technical Center, 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.

 

We are constantly listening to market needs, developing new solutions and evolving its range of halogen-free products and are 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 specific industry requirements.

 

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