Designation
Where to buy| Item | Value |
|---|---|
| Designation | Epoxy resin |
| Class | Composites |
| Type | laminating and prepreg resin |
Neat resin: Hexcel HexPly 8552
| Property | English | Metric (converted) |
|---|---|---|
| Density | 0.0470 lb/in³ | 1.30 g/cm³ |
| Glass transition, dry | 392 °F | 200 °C |
| Glass transition, wet | 309 °F | 154 °C |
| Tensile strength | 17.5 ksi | 121 MPa |
| Tensile modulus | 0.677 Msi | 4.67 GPa |
| Tensile strain | 1.7% | 1.7% |
| Gel time at 350 °F | 13 min | 13 min |
| Service temperature | up to 250 °F | up to 121 °C |
Hexcel HexPly 8552 sheet (2020), "amine cured, toughened epoxy". Wet and dry Tg are measured per the sheet; the gap between them is the moisture effect the FAA describes.
Notes from the guide
- One resin’s numbers. 8552 is a 350 °F prepreg system; a room-temperature wet layup epoxy is a different resin.
- No ratio here. Mix ratios come from the resin data sheet and are by weight.
Where to buy
AmericaDistributor coming soonOur partner for this region is on its way
EuropeDistributor coming soonOur partner for this region is on its way
OceaniaDistributor coming soonOur partner for this region is on its way
Distributors coming soon.
Sources
- Hexcel HexPly 8552 Product Data Sheet (US units, 2020) — neat resin properties, prepreg physical properties, cure procedure, storage life.
- FAA-H-8083-31B, AMT Handbook — Airframe, Volume 1 (2023), Chapter 7 — epoxy resin (pp. 7-6 to 7-7); pot life (glossary).
- AC 43.13-1B, Change 1, Chapter 3, Fiberglass and Plastics — paragraph 3-2 (pp. 3-1 to 3-2).
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.