Park Aerospace E-746 7781 E-Glass
- Chemical Family
- Epoxy & Epoxy Derivatives
Park’s E-746 is a modified epoxy resin system designed to retain excellent mechanical properties after extended exposure to high temperature. E-746 has a proven history in many demanding aerospace applications.
Product families
- Thermoset Prepregs
Other characteristics
- End Uses
- Ducts, Fairings, Nacelles, Radomes
- Functions
- Prepreg
- Polymer Name
- Epoxy Resins & Compounds
- Processing Methods
- Compression Molding, Prepreg Processing
- Reinforcement Material
- Glass Fibers
- Markets
- Automotive & Transportation
- Industrial
- Technology
- Composite Materials
- Product Forms
Available on a wide variety of reinforcements; Solution coated fabrics up to 60 inches wide; Compatible with Autoclave or Press Molding processes
- Quality Standards
- MIL-R-9300B Type 1
- Composites End Use
- Ducts
- Fairings
- Nacelles
- Radomes
- Material Features
- Tacky
- Autoclave Cure Cycle
Apply 24"Hg vacuum (minimum) for 1 hour before beginning heat cycle - Apply 45 – 80 psi autoclave pressure.; Vent vacuum when autoclave pressure reaches 15 – 20 psi - Raise product temperature from RT to 230°F at 2 – 5°F/min; After 30 minute hold time at 230°F, continue ramp to 350°F; Hold product at cure temperature for 2 hours; Cool product to 150°F at no more than 8°F/min; Recommended post-cure: 1 hours at 500°F or 4 hours at 400°F
- Prepreg Storage Life
- Tack Life
- 14 days @ 75°F
- Out Life
- 30 days @ 75°F
- Shelf Life
- 12 months @ 0°F
- Benefits and Features
Excellent retention of mechanical properties after long-term high temperature exposure; Soft tack and drape properties; Long ambient out-time for maximum process flexibility; Good electrical properties for RF applications; Meets requirements of MIL-R-9300B Type II
- Composite Materials Functions
- Prepreg
- Composites Processing Methods
- Compression Molding
- Prepreg Processing
Technical data
Table 1 of 2
14 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Tensile Strength - Dry (75°F) | 65 | Ksi | — |
| Tensile Strength - Dry (280°F) | 50 | Mpa | ASTM-D-638 |
| Tensile Strength - Dry (350°F) | 45 | Mpa | ASTM-D-638 |
| Tensile Strength - Dry (420°F) | 45 | Mpa | ASTM-D-638 |
| Tensile Strength - Dry (500°F) | 45 | Mpa | ASTM-D-638 |
| Compressive Strength - Dry (250°F) | 75 | Ksi | — |
| Compressive Strength - Dry (280°F) | 50 | Ksi | — |
| Flexural Strength - Dry (75°F) | 90 | Ksi | — |
| Flexural Strength - Dry (280°F) | 75 | Ksi | — |
| Flexural Strength - Dry (350°F) | 40 | Ksi | — |
| Flexural Strength - Dry (420°F) | 30 | Ksi | — |
| Flexural Strength - Dry (500°F) | 20 | Ksi | — |
Table 2 of 2
9 rows| Characteristic | Value | Unit |
|---|---|---|
| Fabric Area Weight | 300 | gsm |
| Prepreg Resin Content | 34 - 40 | % |
| Resin Flow (325°F, 50 psi) | 7 - 21 | % |
| Volatiles (325°F) | 2 | % |
| Gel Time | 1 - 3 | minutes |
| Laminate Tg – std cure | 180 | °C |
| Laminate Tg – post cure | 230 | °C |
| Dielectric Constant (9.375GHz) | 4.2 | Dk |
| Loss Tangent (Df) (9.375GHz) | 0.016 | Df |
