Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Reinforcement Material
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Key Features & Benefits
- Specifically designed to allow both oven cure and autoclave cure
- Service temperatures up to 265°F/wet
- Controlled flow for ease of processing
- Flexible cure temperature 270°F to 365°F o Good mechanical properties can be achieved through oven curing at 270°F, followed by postcure at 365°F
- Self-adhesive grade for sandwich panel applications.
- Product Forms
- Available on a wide variety of reinforcements, including fiberglass and graphite
- Fabrics and Unidirectional Tape available up to 24” (61 cm) wide
- Compatible with Autoclave, Vacuum Bag/Oven or Press Molding processes
Applications & Uses
- Applications
- Composites Processing Methods
- Applications / Qualifications
- Primary and Secondary Aircraft Structures
- Ducting
- Fairings
- Nacelles
Properties
- Mechanical Properties
- Physical Properties
| Value | Units | Test Method / Conditions | |
| Tensile Strength 75°F | 340 | Ksi | — |
| Tensile Strength - Dry (250°F) | 350 | Mpa | ASTM-D-638 |
| Tensile Strength - Wet (250°F) | 356 | — | — |
| Tensile Modulus - Dry (75°F) | 23.4 | Msi | — |
| Tensile Modulus - Dry (250°F) | 24.2 | — | — |
| Tensile Modulus - Wet (250°F) | 24.6 | Msi | — |
| Compressive Strength - Dry (250°F) | 264 | Ksi | — |
| Compressive Strength - Dry (250°F) | 190 | Ksi | — |
| Compressive Strength - Wet (250°F) | 148 | Ksi | — |
| Compressive Modulus - Dry (70°F ) | 21.1 | Msi | — |
| Compressive Modulus - Dry (250°F) | 27.2 | GPa | — |
| Compressive Modulus - Wet (250°F) | 22.8 | Msi | — |
| In-Plane Shear Strength 75°F Dry | 13.2 | Ksi | — |
| In-Plane Shear Modulus 75°F Dry | 0.69 | — | — |
| Climbing Drum Peel | 4.6 | in lb/3 in | ASTM-D-1781 |
| Flatwise Tensile Strength | 350 psi (core failure) | — | ASTM-C-297 |
| Value | Units | Test Method / Conditions | |
| Fabric Area Weight | 193 | gsm | — |
| Prepreg Resin Content | 32 - 40 | % | — |
| Resin Flow (275°F, 50psi) | 15 | % | — |
| Volatiles (275°F, 8 min) | max. .5 | % | — |
| Gel Time | 5 - 12 | minutes | — |
Technical Details & Test Data
- Vacuum Bag / Oven Cure Cycle
- Apply 1.0 bar vacuum for 1 hour before beginning heat cycle
- Heat at 0.5 – 3°F/min from room temperature to 230 ± 5°F
- Hold at 230 ± 5°F for 60 minutes
- Heat at 0.5 – 3°F/min to 365 +/-5°F and hold for 125± 5 minutes
- Cool to 160°F at no more than 7°F/min Alternate Cycle: Heat at 0.5 – 3°F /min to 260 ± 5°F and cure for 120 minutes, followed by 120 min free standing post-cure @ 360 +/-5°F.
Storage & Handling
- Prepreg Storage Life
- Tack Life: 21 days @ 75°F
- Out Life: 21 days @ 75°F
- Shelf Life: 12 months @ 0°F