Phenolic Prepregs : Phepreg®
Phepreg® prepregs are highly fire resistant, with very low heat release and toxicity emission, and especially designed to be in a B-Stage for at least 5 months @ 20-23°C and cure rapidly within 10-20 min. @ 121°C, under complete vacuum or equivalent pressure.
The following table presents the Phepreg® products we are offering and their typical features.
Technical specifications
| Product Name | Resin Type | Fiber | Product Form® and FAW(gsm) | DSC Tg(°C) | Months @RT | Gel Time (mins) | Recommended cure | Market/Applications |
|---|---|---|---|---|---|---|---|---|
| Phepreg® FP721 G2 | Phenolic (Resole) | SM & HS Carbon E-Glass | Fabric and Stiched UD (200-650) | 285 | 4-5 | 1-2@120°C 7-9@120°C | 6h@100°C 2h@120°C | Aerospace, Mass-transit, Electric, Defense, Electronics |
| Phepreg® | FP-721 | FP-920 |
|---|---|---|
| Curing Cycle (min @ °C) | 20@120 | 20@120 |
| Tg (°C) | 152±3 | – |
| Max. Tg (°C) | 282±3 | – |
| Flammability | ||
| Extinguishing time | Nil | Nil |
| Burning length | Nil | Nil |
| Drip extinguishing time | No dripping | No dripping |
| Heat Release | ||
| HR – till 3 min. (kW.min/m2) | Not measurable | – |
| HR @ 4 min. (kW.min/m2) | 7.5 | – |
| HR @ 4 min. (kW/m2) | 30 | – |
| Smoke Density | ||
| With pilot flame | 20.6 | 11.35 |
| Without pilot flame | 15.84 | 8.45 |
| Toxicity (ppm) | ||
| CO / NO2 / HCN / H2S / HCl / HF / HBr | 40/2/0/0/0/0/0 | 40/0/0/0/0/0/0 |