PPA

PPA stands for polyphthalamide and is a semi-crystalline, semi-aromatic thermoplastic belonging to the polyamide family.

Polyphthalamide has excellent thermal properties and is therefore highly suitable for use in applications at high temperatures up to 150 °C. PPA has very good mechanical properties and high stiffness when reinforced with glass fiber. In many cases, the polymer can replace metals in applications where materials such as aluminum or brass are normally used.

PPA is used in many industries, but most commonly in electronics, plumbing, and the automotive industry. The polymer can be used, for example, to manufacture under-the-hood automotive components such as fuel lines, thermostat housings, coolant pumps, and valves. PPA is also used to produce components for coffee machines and pumps. There are also flame-retardant variants used in electric vehicle and electronics applications.

Main properties:

  • Excellent thermal properties
  • High stiffness
  • Very good mechanical and electrical properties
  • Glass transition temperature of 126° C
  • Melting point of just over 300° C
  • Good chemical resistance to oils and aliphatic hydrocarbons (less resistant to strong acids)
  • Relatively low moisture absorption
  • High tensile strength
  • High resistance to creep
  • Good wear and friction properties