What is the UL 94 flame rating for Noryl EN265?

Noryl EN265 utilizes non-brominated, non-chlorinated flame retardants and has a UL 94 V-0 rating at thicknesses ? 6.0 mm (0.236 in) and UL 94 V-1 at ? 1.5 mm (0.059 in). It also has a UL 746C F1 rating for outdoor UV and weather resistance.

What is the temperature limit for Noryl EN265?

Noryl EN265 has a typical heat-deflection temperature of 254°F at 264 psi and 279°F at 66 psi. Its typical long-term service temperature is 220°F. UL Relative Thermal Index values are 230°F for electrical use and mechanical use without impact, and 221°F for mechanical use with impact. Actual allowable temperature depends on load, part design, environment, and required service life.

Is Noryl EN265 FDA compliant or food grade?

No. Standard Noryl EN265 is not FDA, USDA, 3-A Dairy, or USP Class VI compliant for direct food contact. For medical or food-processing applications, specialized FDA/medical-grade PPO/PPE formulations are required.

Is Noryl EN265 easy to machine?

Yes; as an amorphous engineering thermoplastic, Noryl EN265 has exceptional machinability. It can be turned, milled, drilled, and tapped using standard metalworking equipment with sharp carbide tooling and effective chip removal. Use only coolants confirmed compatible with the material.

What is the chemical resistance of Noryl EN265?

Noryl EN265 resists water, aqueous salt solutions, and dilute inorganic acids and bases. However, it can be attacked or develop stress cracking when exposed to aromatic hydrocarbons (like toluene), chlorinated solvents, esters, and ketones.

What are the electrical and dielectric properties of Noryl EN265?

Noryl EN265 offers high dielectric strength (~500 V/mil in oil), a stable dielectric constant (~2.69 at 60 Hz), and a low dissipation factor (~0.0007), supporting its use in electrical insulating components.

What standard stock sizes are available for Noryl EN265?

Interstate Plastics offers Noryl EN265 stock shapes in cut-to-size or full sheets/plates (0.250" to 1" thickness) and round rods (1.5" diameter), standard in black.

What are the primary applications for Noryl EN265?

Common applications include electrical housings, terminal blocks, busbar insulation, fluid-handling manifolds, pump impellers, cable conduits, and UV-exposed outdoor electrical enclosures.

Noryl® Plastic Sheets & Rods (PPO)

Buy cut-to-size Noryl® (PPO) sheets and rods in EN265 and medical-grade formulations. Featuring exceptional dimensional stability, low moisture absorption, and high dielectric strength, Noryl is ideal for electrical components and precision machined parts.

Noryl Sheet EN 265

Noryl Rod EN 265

Noryl Rod Black Medical Grade

Impact Strength Sample Pack

What is Noryl® (PPO) Plastic?

Noryl® EN265 (PPO/PPE) is an unreinforced, amorphous blend of polyphenylene ether and polystyrene used in demanding structural, electrical, and fluid-handling applications. Noryl EN265 has a typical 24-hour water absorption of 0.07%, low thermal expansion, and good dimensional stability in humid environments.

Unfilled extruded grades like Noryl EN265 feature good electrical-insulating properties, dimensional stability, impact resistance, and machinability. EN265 uses non-brominated, non-chlorinated flame-retardant additives and carries UL 94 ratings of V-0 at thicknesses of 6.0 mm and greater and V-1 at thicknesses of 1.5 mm and greater.

Exceptional Dimensional Stability: Low moisture absorption helps limit dimensional changes in humid environments
Low Moisture Absorption: Only 0.07% over 24-hour immersion
Non-Halogenated Flame-Retardant System: EN265 uses non-brominated, non-chlorinated flame-retardant additives
High Dielectric Strength: 500 V/mil per ASTM D149
Broad Thermal Window: Long-term service temperatures up to 220°F (104°C)
Easy Machinability: Can be machined into close-tolerance components using appropriate tooling and practices
Lightweight Design: Low specific gravity (1.08) compared to metal alternatives

Common Noryl® Applications & Industries

Noryl® PPO sheets and rods are used in electrical, semiconductor, medical, and fluid-handling industries:

Electrical housings, busbar covers, switchgear, and terminal blocks
Fluid-handling manifolds, pump impellers, and valve bodies
Semiconductor processing equipment components
Scientific and analytical instrument structural parts
Cable conduits, wire trunking, and high-voltage insulating barriers
Outdoor electrical enclosures requiring UV and weather resistance
Medical devices and surgical trays (using medical-grade Noryl only)

Noryl® Machining & Fabrication Services

Interstate Plastics offers machining and fabrication services for Noryl® prototypes and production components. We deliver reliable results across prototypes and full production runs, maintaining precise tolerances for demanding applications.

Noryl® (Unfilled) Physical Properties & Specifications

Specific Gravity	1.08
Tensile Strength	9,600 psi
Tensile Modulus	350 ksi
Elongation	25%
Flexural Strength	14,400 psi
Flexural Modulus	370 ksi
Izod Impact Strength, Notched	3.5 ft-lbs/in.
Rockwell Hardness	R119
Heat Deflection Temp. 66 psi / 264 psi	279°F / 254°F
Water Absorption @ 24 hrs.	0.07%

*Values listed are typical and are meant only as a guide to aid in design. Field testing should be performed to find the actual values for your application.

Frequently Asked Questions About Noryl

What is the UL 94 flame rating for Noryl EN265?: Noryl EN265 utilizes non-brominated, non-chlorinated flame retardants and has a UL 94 V-0 rating at thicknesses ≥ 6.0 mm (0.236 in) and UL 94 V-1 at ≥ 1.5 mm (0.059 in). It also has a UL 746C F1 rating for outdoor UV and weather resistance.
What is the temperature limit for Noryl EN265?: Noryl EN265 has a typical heat-deflection temperature of 254°F at 264 psi and 279°F at 66 psi. Its typical long-term service temperature is 220°F. UL Relative Thermal Index values are 230°F for electrical use and mechanical use without impact, and 221°F for mechanical use with impact. Actual allowable temperature depends on load, part design, environment, and required service life.
Is Noryl EN265 FDA compliant or food grade?: No. Standard Noryl EN265 stock shapes are not inherently suitable for direct food contact or patient contact. For medical or food-processing applications, specialized FDA/medical-grade PPO/PPE formulations are required.
Is Noryl EN265 easy to machine?: Yes; as an amorphous engineering thermoplastic, Noryl EN265 has exceptional machinability. It can be turned, milled, drilled, and tapped using standard metalworking equipment with sharp carbide tooling and effective chip removal. Use only coolants confirmed compatible with the material.
What is the chemical resistance of Noryl EN265?: Noryl EN265 resists water, aqueous salt solutions, and dilute inorganic acids and bases. However, it can be attacked or develop stress cracking when exposed to aromatic hydrocarbons (like toluene), chlorinated solvents, esters, and ketones.
What are the electrical and dielectric properties of Noryl EN265?: Noryl EN265 offers high dielectric strength (~500 V/mil in oil), a stable dielectric constant (~2.69 at 60 Hz), and a low dissipation factor (~0.0007), supporting its use in electrical insulating components.
What standard stock sizes are available for Noryl EN265?: Interstate Plastics offers Noryl EN265 stock shapes in cut-to-size or full sheets/plates (0.250" to 1" thickness) and round rods (1.5" diameter), standard in black.
What are the primary applications for Noryl EN265?: Common applications include electrical housings, terminal blocks, busbar insulation, fluid-handling manifolds, pump impellers, cable conduits, and UV-exposed outdoor electrical enclosures.

Noryl® EN265 Sheets & Rods

Noryl Sheet - Black EN 265

Black Noryl EN265 sheet combines stiffness, low moisture absorption, and good electrical insulation for machined panels and equipment covers.

Noryl Rod - Black EN 265

Black Noryl EN265 rod provides dimensionally stable stock for turned spacers, insulating sleeves, and other precision-machined parts.

Medical-Grade Noryl® Rods

Noryl Rod - Black Medical Grade

Black medical-grade Noryl rod offers strength and dimensional stability for machined instrument handles and other healthcare components.

Noryl® Material Sample Packs

Impact Strength Material Sample Pack

Includes a 6" x 6" sample of ABS, Noryl, Polycarbonate, and UHMW.

WARNING: This product can expose you to chemicals including Carbon Black, CAS 1333-86-4, which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

WARNING: This product can expose you to chemicals including Toluene, CAS 108-88-3, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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