Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Fillers Included
- Polymer Name
- Reinforcement Material
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Key Features & Benefits
- Provides a combination of high-strength and ablative properties for demanding applications.
- Low thermal expansion
- Good Tack and Drape properties
- Conforms to WS-21053
- Resin conforms to MIL-R-9299
- Product Forms
- Available in Broadgoods, Chopped Molding Compound and Bias Tape
- Solution coated fabrics up to 38” inches wide
- Compatible with Autoclave or Press Molding processes
Applications & Uses
- Markets
- Composites Processing Methods
- Applications / Qualifications
- Rocket Nozzles
- Combustion Chambers
- Heat Shields
- Rocket Motor Throat Sections
- Autoclave Cure Cycle (Broadgoods)
- Apply 24”Hg vacuum (minimum) for 1 hour before beginning heat cycle
- Apply 10 psi autoclave pressure
- Raise product temperature from RT to 250°F at 2 - 5°F/min
- Increase autoclave pressure to 40psi, vent vacuum at 15 – 20 psi
- Hold product at 250 ± 5°F for 30 minutes
- Raise product temperature to 325 ± 5°F at 2 - 5°F/min
- Hold product at cure temperature for 60 – 90 minutes
- Cool to 150°F at no at no more than 8°F/min prior to releasing autoclave pressure
- Press Cure Cycle (Chopped Molding Compound)
- Apply 1,000 - 2,000 psi pressure during cure
- Cure product at 325°F for 90 – 120 minutes
Properties
- Physical Properties
- Mechanical Properties
| Value | Units | Test Method / Conditions | |
| Nominal Prepreg Weight | 30 | oz/sqyd | — |
| Resin Solids Content | 29 - 36 | % | — |
| Filler Content | 4 - 11 | % | — |
| Resin Flow (325°F, 150 psi) | 10 - 20 | % | — |
| Volatiles (325°F, 10 min) | 3 - 5.5 | % | — |
| Nominal Cured Ply Thickness | 0.021 | — | — |
| Barcol Hardness | 70 | — | ASTM-D-2583 |
| CTE - With Ply (75 - 340°) | 5.8 | μin/inꞏºF | ASTM-E-831 |
| CTE - Across Ply (75 - 340°) | 18.8 | μin/inꞏºF | ASTM-E-831 |
| Value | Units | Test Method / Conditions | |
| Specific Gravity | 1.8 | g/cc | ASTM-D-792 |
| Specific Heat | 0.26 | BTU/lb°F | ASTM-C-351 |
| Thermal Conductivity - With Ply (250°F) | 0.29 | BTU/ft2-hr°F | ASTM-C-177 |
| Thermal Conductivity - Across Ply (250°F) | 0.4 | — | ASTM-C-177 |
| Thermal Diffusivity - With Ply (250°F) | 0.014 | ft2/hr | ASTM-C-177 |
| Thermal Diffusivity - Across Ply (250°F) | 0.012 | — | ASTM-C-177 |
| Cure Cycle (325°F) | 1000 | psi | — |
| Tensile Strength - Dry (75°F) | 16.48 | Ksi | ASTM-D-638 |
| Tensile Modulus - Dry (75°F) | 1.25 | Msi | ASTM-D-638 |
| Tensile Strength - Dry (90° 75°F) | 16.5 | Ksi | ASTM-D-638 |
| Tensile Modulus - Dry (90°C 75°F) | 1.3 | Msi | ASTM-D-638 |
| Compressive Strength - Dry (75°F) | 60.8 | Ksi | ASTM-D-695 |
| Compressive Modulus - Dry ( 75°F) | 3.5 | Msi | ASTM-D-695 |
| Compressive Strength - Dry (90° 75°F) | 40.3 | Ksi | ASTM-D-695 |
| Compressive Modulus - Dry (90° 75°F) | 2.9 | Msi | ASTM-D-695 |
| Short Beam Shear - Dry (75°F) | 5.9 | Ksi | ASTM-D-2344 |
Regulatory & Compliance
- Quality Standards
Storage & Handling
- Prepreg Storage Life
- Out Life: 30 days @ 75°F
- Shelf Life: 6 months @ 40°F (dry)