Polyphthalamides (PPAs) are semi-crystalline aromatic polyamides (PA). They belong to the class of thermoplastics. PPA differs in its properties from aliphatic polyamides and aromatic polyamides (aramids). Polyphthalamide-based plastics replace metals in areas where high heat resistance combined with high mechanical stability is required.
Properties of PPA
- Chemical resistance
- Higher strength and stiffness at elevated temperatures
- Creep and fatigue strength
- Dimensional stability
Applications of PPA
Pump wear rings, engine body parts, fuel line connections, water heater manifolds, fuel shut-off valves, thermostat housings, air coolers, coolant pumps and LED headlamps.
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