Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Product Highlights
Uncured
- Controlled flow
- Process working life greater than 20 days
Cured
- High laminate mechanical strengths and strains
- High strength retention at 450°F (232°C) dry and 350°F (177°C) wet
- Improved compression after impact properties
- Void-free thick laminate processability
- Void-free thick laminate co-cure processing over honeycomb core
- Long-term service life to 400°F (204°C)
- Excellent electrical properties
Applications & Uses
- Applications
- Composites Processing Methods
Properties
- Physical Form
- Neat Resin Properties
| Value | Units | Test Method / Conditions | |
| Specific gravity | 1.25 | — | — |
| Tg (Dry) | 550 (288) | °F (°C) | — |
| Tg (Wet) | min. 400 (204) | °F (°C) | — |
| Equilibrium moisture absorption | 4.1 | % | — |
| Coefficient of Thermal Expansion | 75–482 | °F | — |
| Temperature range | 347–482 | °F | — |
| Fracture Toughness, K1C | 1.25 (1.37) | ksi (Mpa) | — |
Packaging & Availability
- shipping
- Prepreg fabric and tape are generally shipped in sealed polyethylene bags in insulated containers packed with dry ice.
Storage & Handling
- Storage
HexPly® F655™ prepreg should be sealed in a polyethylene bag and refrigerated, preferably below 32°F (0°C). Following removal from refrigerated storage, allow the prepreg to reach room temperature before opening the polyethylene bag to avoid moisture condensation. Shelf life: 12 months at 0°F (–18°C), 6 months at 40°F (4°C) (maximum, from date of manufacture).
- Product Handling and Safety
Hexcel recommends that customers observe established precautions for handling polyimide resins and fine fibrous materials. Operators working with this product should wear clean, impervious gloves to reduce the possibility of skin contact and to prevent contamination of the material.