Enhanced Performance at High Temperatures
Grivory® is the trade name for a group of technical thermoplastics manufactured and distributed by EMS-GRIVORY. Grivory HT is a semi-crystalline thermoplastic construction material based on polyphthalamide (PPA).
EMS-GRIVORY, based in Domat/Ems (Switzerland), developed its own innovative process to manufacture, polymerise and compound Grivory HT. Production capacity has been adjusted to meet strong demand. EMS-GRIVORY has grown to become one of the world’s leading providers of polyphthalamides and leads the field on the European market.
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 absorption 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 GV and Grivory HT products are supplied ready for injection-moulding processing. The Grivory HT3 product range also includes extrusion grades.
| Property | Grade | Grivory | Grivory | Grivory |
| HT1 | HT2 | HT3 | ||
| High Hydrolysis resistance | HT1A-HY | x | ||
| High Hydrolysis resistance/suitable for contact with food and drinking water | HT1A-FWA | x | ||
| Electro compatible stabilization | X | x | x | x |
| Flame retardant, halogen free (UL 94, V0) | V0 | x | x | |
| Long glass fiber reinforced | VL | x | ||
| Carbon-fiber reinforced | C | x | x | |
| Low friction | LF | x | ||
| Renewable raw materials | x |
The groups contain a wide range of grades, which vary in terms of the type and concentration of the reinforcing agents (glass fibers, minerals) used, the stabilisers and the processing aids.
Grivory FWA products are physiologically harmless and are also used in sensitive application areas with direct contact to drinking water and foodstuffs.