Noryl Applications — Electrical Housings, Telecom & Water Systems

Noryl (SABIC's modified PPO+PS blend) finds its primary applications wherever the combination of low dielectric constant, V-0 flame rating, excellent dimensional stability, and low moisture absorption distinguishes it from other engineering thermoplastics. Its core market is electrical and electronic equipment; secondary applications include water handling, automotive, and medical device enclosures.

At a glance:

• Primary: electrical component housings, transformer bobbins, switchgear, relay enclosures
• Secondary: telecommunications radomes and housings, automotive sensor bodies, fluid handling
• Water handling: potable-water-approved Noryl grades for pump bodies and valve components
• Not suited for: high aromatic solvent exposure, temperatures above 220°F (unfilled grades)

Electrical and Electronic Equipment

This is Noryl's home territory. Its combination of low dielectric constant (2.65), V-0 flame rating, and outstanding dimensional stability in humid environments makes it the standard electrical-grade engineering thermoplastic for stock-shape machined components.

Transformer Bobbins and Coil Formers

Noryl EN265 is the classic material for transformer bobbins (coil formers) machined from rod or plate. The bobbin holds the wire coil in geometry while ensuring the transformer meets UL 94 V-0 flame requirements. Noryl's low dielectric constant minimizes stray capacitance between the coil and core, and its dimensional stability in the elevated temperatures and humidity of transformer service maintains winding geometry over service life.

Noryl's CTE (3.4 × 10⁻⁵ in/in/°F) is close to many copper winding materials, reducing differential thermal stress at the coil-former interface.

Relay and Contactors Housings

Relay housings machined from Noryl EN265 meet UL 94 V-0 requirements for electrical apparatus. The housing must remain dimensionally stable under repeated electrical heating cycles and in humid environments — two requirements where Noryl excels over polycarbonate (higher moisture absorption) and acetal (lower flame rating).

Circuit Breakers and Switchgear

Noryl's high arc resistance (75 sec) and V-0 flame rating suit it for machined parts in switchgear enclosures, circuit breaker housings, and electrical panel components. The material resists tracking (surface carbonization from electrical arc) better than many flame-retardant plastics.

Bus Bar Insulation and Standoffs

The low dielectric constant and high surface resistivity make Noryl suitable for bus bar insulators, electrical standoffs, and high-voltage insulators where minimizing capacitive coupling and maintaining surface insulation resistance in humid environments is required.

Telecommunications and RF Applications

Noryl's remarkably flat dielectric constant versus frequency (2.65 at 1 MHz, 2.64 at 1 GHz) makes it one of the few engineering plastics suitable for broadband RF and microwave applications.

Antenna Radomes and Housings

Radomes (the protective enclosures for radar or antenna arrays) must be electrically transparent — any deviation in dielectric constant introduces signal phase shifts and attenuation. Noryl's low, stable ε' allows RF energy to pass through with minimal distortion, while the V-0 flame rating addresses safety requirements for installed telecommunications equipment.

For outdoor radome applications, Noryl's low moisture absorption (0.07% at 24 hr) prevents the dielectric property shift that occurs with polycarbonate or nylon in humid environments — a critical advantage for consistent antenna performance across seasons and climates.

Waveguide Components

Microwave waveguide transitions, coupling windows, and filter bodies machined from Noryl use the material's low dielectric constant to minimize insertion loss. The dimensional stability from low moisture absorption is essential — even small dimensional changes in waveguide components shift the resonant frequency.

Communication Equipment Enclosures

Housing for base stations, distribution panels, and telecommunications relay equipment specify Noryl for electrical insulation, V-0 flame rating (required by IEC 60950-1 and successor standards for IT equipment safety), and dimensional stability.

Automotive Electrical Applications

Noryl competes in the automotive electrical market for applications where temperature resistance exceeds polycarbonate capability but PEEK cost is not justified:

• Sensor housings: Automotive pressure and temperature sensor bodies in underhood environments up to ~200°F (93°C)
• Electrical connector housings: Where V-0 flame rating and dimensional stability are specified; GFN3 is used where structural rigidity is also required
• Fluid handling bodies: Noryl resists the aqueous glycol (coolant) and dilute acid environments in automotive fluid systems

Water Handling and Plumbing

Noryl has long been specified for potable water contact applications under NSF/ANSI 61 approvals. SABIC offers Noryl grades specifically formulated and tested for potable water compliance.

Pump Bodies and Impellers

Noryl's dimensional stability in water (0.07% absorption, <0.01% dimensional change at saturation) makes it suitable for pump impellers, pump housings, and valve bodies in water systems where nylon would swell and change clearances. The material's resistance to water/detergent combinations in hot water environments (within the 93°C continuous-use limit) covers hot water recirculation pumps and dishwasher pumps.

Valve Components and Fittings

Machined Noryl valve bodies and seats are used in water purification systems, irrigation controllers, and building automation water management. The combination of dimensional stability, flow resistance, and NSF-61 compliance drives the specification.

Medical Device Enclosures

Noryl's V-0 flame rating is directly relevant for powered medical devices — IEC 60601-1 (the safety standard for medical electrical equipment) requires flame performance for enclosure materials. Noryl EN265 meets this requirement while offering:

• Dimensional stability in autoclave-adjacent environments (not for steam sterilization itself — Noryl is not autoclavable at 121°C)
• Chemical resistance to hospital cleaning agents (dilute alkalis, quaternary ammonium)
• Electrical isolation for enclosures of electrically powered devices

For medical devices requiring sterilizable enclosures, PSU (Udel) or PEEK are required. Noryl suits non-sterile exterior housing applications.

Application Summary

More related guides

Applications

• Electrical Insulation Components
• Pump & Valve Components

Industries

• Electrical & Electronics
• Telecommunications

Compare to other materials

• Noryl vs. Polycarbonate
• Noryl vs. Acetal

Frequently asked questions — Noryl FAQ