Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Reinforcement Material
- Composite Materials Functions
- Technologies
Features & Benefits
- Key Features & Benefits
- Excellent retention of mechanical properties after long
- Term high temperature exposure
- Long out‐time for easy processing
- Good electrical properties
- Product Forms
- Available on a wide variety of reinforcements including fiberglass and quartz
- Solution coated fabrics up to 60 inches wide
- Compatible with Autoclave or Press Molding processes
Applications & Uses
- Applications
- Composites Processing Methods
- Applications / Qualifications
- Secondary Aircraft Structures
- Radomes
- Nacelles
- Inlet Ducts
- Fairings
- Autoclave Cure Cycle
- Apply 24”Hg vacuum (minimum) for 1 hour before beginning heat cycle
- Apply 60psi autoclave pressure
- Raise product temperature from RT to 230°F at 2 – 3°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
Properties
- Mechanical Properties
- Physical Properties
| Value | Units | Test Method / Conditions | |
| Tensile Strength 75°F | 60 | Ksi | — |
| Tensile Strength - Dry (350°F) | 50 | 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 (75°F) | 60 | Ksi | — |
| Compressive Strength - Dry (350°F) | 52 | Ksi | — |
| Compressive Strength - Dry (420°F) | 52 | Ksi | — |
| Compressive Strength - Dry (500°F) | 45 | Ksi | — |
| Flexural Strength - Dry (350°F) | 60 | Ksi | — |
| Flexural Strength - Dry (420°F) | 50 | Ksi | — |
| Flexural Strength -Dry (500°F) | 30 | Ksi | — |
| Flexural Modulus - Dry (75°F) | 3.4 | Msi | — |
| Flexural Modulus - Dry (75°F) | 85 | Ksi | — |
| Flexural Modulus - Dry (350°F) | 2.9 | GPa | — |
| Flexural Modulus - Dry (420°F) | 2.8 | GPa | — |
| Flexural Modulus - Dry (500°F) | 2.4 | GPa | — |
| Short-Beam Shear Stength - Dry (75°F) | 6.7 | Ksi | — |
| Short-Beam Shear Stength - Dry (350°F) | 4.8 | Ksi | — |
| Value | Units | Test Method / Conditions | |
| Fabric Area Weight | 300 | gsm | — |
| Prepreg Resin Content | 33 - 37 | % | — |
| Resin Flow (325°F, 50 psi) | 10 - 24 | % | — |
| Volatiles (275°F) | max. 2 | % | — |
| Gel Time | 1 - 2 | minutes | — |
| Laminate Tg – std cure | 180 | °C | — |
| Laminate Tg – post cure | 230 | °C | — |
| Barcol Hardness | 80 | — | — |
| Dielectric Constant | 4.2 | Dk | — |
| Loss Tangent | 0.015 | Df | — |
Storage & Handling
- Prepreg Storage Life
Tack Life: 14 days @ 75°F
Out Life: 30 days @ 75°F
Shelf Life: 6 months @ 0°F