MATERIALS: Halogen-Free FR Nylon 6 for Electrical Switches

Lanxess' halogen-free FR, glass-reinforced nylon 6 has high mechanical strength and thermal stability for use in a broad range of circuit breakers.

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A new halogen-free flame-retardant, glass-reinforced nylon 6, launched by Lanxess, Pittsburgh, Penn., reportedly outperforms in mechanical strength and thermal stability mineral-filled halogen-free nylon 6 grades used in the manufacture of electrical switches such as circuit breakers.

Components made of Durethan BKV FN27 have been shown to effectively withstand the enormous mechanical stresses and high-temperature peaks that occur during a short circuit.

Moreover, the material also meets the requirements placed on a circuit breaker for high performance classes (rated currents). This can result in potential savings for the manufacturers of these safety parts, says Alexander Radeck, an expert in FR thermoplastics at Lanxess High Performance Materials business unit. “For the manufacture of various parts therefore only one material is required. Manufacturers benefit from lower costs, for example for storage and logistic processes, but also in the quality control.”

The material has a classification of UL 94 V-2 for test pieces up to 0.03-in. thick. It also achieves the best possible GWFI (Glow Wire Flammability Index) value for plastics at 1760˚F for specimen thicknesses of less than 0.039 inches. Also cited are its lower density compared to mineral-filled equivalents, that it shrinks isotropically and can be colored as required, and good weldability by ultrasound with high weld strengths achieved.