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Grivory HT

Enhanced Performance at High Temperatures

Grivory® is the trade name for EMS-GRIVORY’s family of semi-crystalline, partially aromatic polyamides. Grivory HT comprises of aromatic, semi-crystalline, high-performance products based on polyphthalamide (PPA) structure.

EMS-GRIVORY, based in Domat/Ems (Switzerland), has developed its own innovative manufacturing process for the polymerization and compounding of Grivory HT. The production capacity has been continuously adapted to meet the strong market demand. EMS-GRIVORY has currently become the world's leading supplier of polyphthalamides.

EMS-GRIVORY has designed the Grivory HT families with a high performance profile. The main distinguishing feature of Grivory HT compared to other polyamides is its good performance at high temperatures. This makes it possible to produce injection moulded parts economically with excellent mechanical properties, heat resistance and chemical resistance.
Grivory HT is an ideal construction material as a metal replacement and offers excellent opportunities for cost and weight reduction as well as energy savings. Grivory HT outperforms polyphenylene sulphide (PPS) and polyetheretherketone (PEEK) in terms of stiffness and strength at application temperatures up to 140°C.

The properties of Grivory HT include:

  • Excellent stiffness and strength at high operating temperatures
  • Good resistance to chemicals and hot water
  • Low absoption of moisture or water
  • Low moisture effects on mechanical physical properties
  • Good dimensional stability and low warpage Good surface quality
  • Low water absorption
  • Economical manufacturing

The Grivory HT grades

The Grivory HT product range includes a number of groups with different base polymers.

  • Grivory HT1: PA6T/6I
  • Grivory HT2: PA6T/66
  • Grivory HT3: PA10T/X
  • Grivory HT6: PA6T/8T/X
PropertyGradeGrivory HT1Grivory HT2Grivory HT3Grivory HT6
High Hydrolysis resistanceHT1A-HYX  X
High Hydrolysis resistance/suitable for contact with food and drinking waterHT1A-FWAX   
Electro compatible stabilizationXXXXX
Flame retardant, halogen free (UL 94, V0)V0 XXX
Long glass fiber reinforcedVLX   
Carbon-fiber reinforcedC XXX
Low frictionLF X X
Renewable raw materials   X