Page 245 - Engineering Plastics Handbook

Polyphenylene Ether (PPE) Blends and Alloys 209

Noryl GTX 8410: Higher flow, 10% glass-reinforced; 486°F (252°C)
HDT at 66 psi (0.45 MPa); suitable for thin-wall automotive electri-
cal applications
Noryl GTX 820: 20% glass-reinforced; 490°F (254°C) HDT at 66 psi
(0.45 MPa); higher strength and stiffness; suitable for valve applications
Noryl GTX 830: 30% glass-reinforced; 490°F (254°C) HDT at 66 psi
(0.45 MPa); high heat resistance; highest strength and stiffness grade;
suitable for under-the-hood applications and pumps

Conductive PPE/PA grades. These uniquely combine high heat resistance
for electrostatic-coat capability and conductivity to eliminate conductive
primers and improve paint transfer capability. These grades are based
upon GE’s exclusive patented technology for dispersing conductive carbon
black in PPE/PA alloys. This resin technology was originally developed to
replace exterior automotive metal body panels requiring high ductility, and
it has largely been driven by the industry’s requirement to reduce weight
in cars and for improved impact performance. In some cases, body panels
and fenders made of this material have been shown to withstand an impact
test without permanent deformation.
The potential for productivity improvements from conductive PPE/PA
resins includes elimination of the paint primer, ability to coat plastic and
metal parts on the same line, excellent color matches between metal and
plastics, and overall system cost savings. These characteristics, coupled with
its inherent light weight, improved efficiency of assembly, and high impact
strength, can make PPE/PA resins exceptional alternatives to metal parts
and other material substrates in a variety of applications, including auto-
motive body components (tank flaps, spoilers, front grills, rear and front
corner panels, license plate appliqué, pillar trim, mirror housings, and side
trim and sill finishers), outdoor vehicles, lawn and garden equipment,
appliances, office furniture, and lighting fixtures. These grades include

Noryl GTX 975: can be either painted or powder-coated in-line with
metal parts in just one run, without the need for conductive primers.
Furthermore, because of its extra high heat resistance [365°F (185°C)
HDT at 66 psi (0.45 MPa)], it can replace lower heat-resistant resins
which have to be painted off-line, thus contributing to greater effi-
ciency in part assembly. In addition, the resin’s increased stiffness and
dimensional stability offer even greater design flexibility and inte-
gration potential in replacing metal, and hence even greater poten-
tial weight savings. The low thermal expansion enables better gap and
flush management on the car body.
Noryl GTX 973, 976, and 979: These are new grades of conductive
resins and are specially designed to withstand the higher heat of the