Polyphthalamide (PPA)
High-temperature polyamide for e-motor cooling circuits and connectors, distinct from PA6/66, PPS and PEEK.
Overview
Polyphthalamide (PPA) is a semi-aromatic polyamide used where PA6/PA66 run out of temperature or hydrolysis resistance — e-motor cooling circuits, high-temperature connectors, thermostat housings and charge-air parts. Glass- or mineral-filled grades are the automotive default. PPS, PEEK and unfilled or glass-filled PA6/66 sit elsewhere in the library. PPA sits between PA66 and PPS on temperature, with better toughness than many PPS grades and lower cost than PEEK. Water uptake is lower than PA66 but still needs design allowance. Typical processing is injection moulding. It is specified as a high-temp polyamide family, not a single OEM grade.
Automotive Applications
Similar Materials
Glass-Filled PA6 / PA66
Glass-Filled Polyamide
Glass-filled nylon 6 and 66 for under-bonnet housings, distinct from unfilled nylon and PA12-CF.
PEEK (Polyether Ether Ketone)
High-Performance Polymer
An ultra-high-performance semi-crystalline thermoplastic with exceptional mechanical, thermal, and chemical resistance properties for demanding automotive applications.
PPS
Polyphenylene Sulphide
High-temperature polyphenylene sulphide for under-bonnet parts and e-motor insulation.
Polybutylene Terephthalate (PBT)
Engineering Thermoplastic Polyester
A semi-crystalline engineering thermoplastic with excellent electrical properties, chemical resistance, and dimensional stability used widely in automotive electrical connectors and housings.
Properties
Category
Type
High-Temp Polyamide
Available Forms
Key Properties
- Semi-aromatic high-temp polyamide
- Above PA66 temperature capability
- Glass- or mineral-filled automotive grades
- Distinct from PA-GF, PPS and PEEK
- Lower water uptake than PA66
- Injection-moulded engineering resin