Page 235 - Engineering Plastics Handbook

Polyphenylene Ether (PPE) Blends and Alloys 201

Noryl BN5308: 179°F (82°C) HDT at 264 psi (1.82 MPa); UL-94 V-1
rating
Noryl BN9003: 245°F (118°C) HDT at 264 psi (1.82 MPa); good ductil-
ity, low-temperature impact

Flame-retardant extrusion grades. These take advantage of the excellent
melt strength of modified PPE and provide opportunities for improved
extrusion productivity. Extrusion grades are formulated with a nonbromi-
nated, nonchlorinated flame retardant. Extrusion grades find uses in PVC
underground pipe replacement, office wire trim, fiber-optics raceways,
bus trims, and roofing panels. Grades and key features are
Noryl EN185: Excellent impact strength; 210°F (99°C) HDT at 264 psi
(1.82 MPa); UL-94 V-1/5VA ratings
Noryl EN212: 254°F (123°C) HDT at 264 psi (1.82 MPa); UL-94
V-1/5VA ratings
Noryl EN265: 254°F (123°C) HDT at 264 psi (1.82 MPa); UL-94 V-0/
V-1 ratings
Noryl ENV105: Corrugated pipes; 176°F (80°C) HDT at 264 psi (1.82
MPa); UL-94 V-1 rating

Food packaging grades. These are a segment of extrusion grades for-
mulated for the food packaging industry. Modified PPE offers impact and
heat resistance, hydrolytic stability, dimensional stability, and high
melt strength suitable for food packaging such as freezer-to-microwave
packaging and takeout food containers. Key advantages of modified
PPE packaging resins over other plastics include
■ Microwavable: heat resistance >212°F (100°C)
■ Available in opaque and transparent/translucent
■ Colorable
■ Freezer-safe—excellent impact strength at low temperatures
■ Safe handling—practical stiffness over a wide temperature range
■ Food contact compliant (FDA 21 CFR 177.2460)
■ Hydrolytic stability
■ No taste or odor transfer
■ Design flexibility (e.g., hinge, multicompartment, deep draw, thinner
gauge)
■ Dimensional stability
■ Suitable for mono-, multi-, and foam extrusion
■ System cost reduction