HIGH TEMPERATURE GRAPHITE LAMINATINGHIGH TEMPERATURE GRAPHITE LAMINATING
GENERAL DESCRIPTION: HTR-350 high temperature laminating is a tough, high-impact resin offering excellent heat distortion for tools requiring elevated temperatures. It has excellent handling properties, stable physicals with good wet-out for hand lay-up. HTR-350 cures at room temperature in 24 hours then post cure.
| Ratio by Weight | 100pbw to 25pbw |
| Ratio by Volume | 4 to 1 |
| Pot Life at 72ºF (200 Grams Mass) | 165 minutes |
| Shore "D" Room Temperature | 85-88 |
| Shore "D" 350ºF | 84-86 |
| Flexural Strength at 72ºF | 55,000 |
| Flexural Modulus at 72ºF | 6.25 x 106 |
| Flexural Strength at 350ºF | 36,000 |
| Flexural Modulus at 350ºF | 4.10 x 106 |
| Heat Distortion | 450ºF |
| Density Resin | 9.75 |
| Density Hardener | 8.35 |
| Density Mixed | 9.46 |
| Specific Gravity Resin | 1.18 |
| Specific Gravity Hardener | 1.00 |
| Specific Gravity Mixed | 1.09 |
| Shelf Life Resin/Hardener | 1 year |
| Co-efficient of Linear Thermal Expansion | 3.4 x 106/ºC |
CLTE (GRAPHITE/EPOXY COMPOSITE)
Upon completion, the tool should be allowed to cure at ambient temperature. At that point apply an oven cure according to the following schedule (this schedule is recommended for a tool which will be exposed to an operating temperature at 350ºF):
1 hour @ 150ºF
1 hour @ 250ºF
3 hours @ 350ºF
1 hour @ 400ºF
After the oven has cooled to ambient temperature (77 degrees) remove the tool.