Handling the heat
Short term
Arnite has excellent thermal properties. The HDT-B for Arnite T grades is 170°C when unreinforced and 220°C for glass-fiber reinforced grades. Glass-fiber reinforced Arnite A grades, can perform in even higher HDT-B temperatures of up to 250°C.
Long term
Arnite has excellent high temperature thermal and oxidative stability. UL RTI listings of continuous use temperatures are generally 130-140°C for most Arnite grades. This makes Arnite ideal for demanding automotive and low switchgear applications that feature high temperatures.
| Arnite PET GF35 | Arnite PET GF50 | |
|---|---|---|
| HDT-A [0.45 MPa] |
250°C | 252°C |
| HDT-B [1.8 MPa] |
235°C | 240°C |
The Continuous Use Temperature (measured as the temperature at which the tensile strength is > 50% after being exposed for 5000 h to that temperature) reflects excellent heat resistance for automotive applications.
| CUT (automotive) | |
|---|---|
| Arnite PBT | 130 - 140 ºC |
| Arnite PET | 150 - 160 ºC |
Arnite PET can be used at peak temperatures up to ca. 220 - 230ºC. Arnite has similar stiffness levels as GF PPA and PPS at temperatures of about 150ºC.
In addition Arnite polyesters have excellent color stability during aging at elevated temperatures making them suited particularly lighting applications such as lamp bezels and lamp holders.
