Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Reinforcement Material
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Key Features & Benefits
- 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
- Product Forms
- Available on a wide variety of reinforcements
- Solution coated fabrics up to 60 inches wide
- Compatible with Autoclave or Press Molding processes
Applications & Uses
- Applications
- Composites Processing Methods
- 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
Properties
- Mechanical Properties
- Physical Properties
| Value | Units | Test Method / Conditions | |
| 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 | — |
| Short-Beam Shear Stength - Dry (75°F) | 6.9 | Ksi | — |
| Short-Beam Shear Stength - Dry (350°F) | 3 | Ksi | — |
| Value | Units | Test Method / Conditions | |
| 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 | — |
Regulatory & Compliance
- Quality Standards
Storage & Handling
- Prepreg Storage Life
- Tack Life: 14 days @ 75°F
- Out Life: 30 days @ 75°F
- Shelf Life: 12 months @ 0°F