Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Product Highlights
- Excellent drapeability—complex shapes easily formed
- Good surface finish
- Medium tack level—easily laminates to mold surface
- Low volatile content—no solvents used during processing
- 60 days out life at ambient temperature
- Autoclave, vacuum bag, or press curable
Applications & Uses
- Applications
- Composites End Use
- Composites Processing Methods
- Recommended Applications
- Sport & Recreation
- Motorsport & Formula 1
- Automotive
- Medical
- Industrial
- Marine industries
- General aircraft fittings
- Wide range of engineering Applicationss
- Processing Method
Cut patterns to size and lay-up the laminate in line with design instructions taking care not to distort the prepreg. If necessary, the tack of the prepreg may be increased by gentle warming with hot air. The lay-up should be vacuum debulked at regular intervals using a P3 (pin pricked) release film on the prepreg surface; a vacuum of 980 mbar (29 in Hg) is applied for 20 minutes. For autoclave cures, use of a nonperforated release film on the prepreg surface trimmed to within 25–30 mm of the prepreg edge is recommended for the cure cycle and a vacuum bag should be installed using standard technique
Properties
- Physical Form
- Thermal Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Tg (DMTA) after 1 hr at 120°C (248°F) Onset | 120 (248 | °C (°F) | — |
| Tg (DMTA) after 1 hr at 120°C (248°F) Peak tan δ | 138 (280) | °C (°F) | — |
| Value | Units | Test Method / Conditions | |
| Density (23°C (73.4°F)) | 1.21 (75.5) | g/cm³(lbs./ft³) | — |
Technical Details & Test Data
- Recommended Cure Cycle
- Toray E722 can be successfully molded by vacuum bag, autoclave, or matched die molding techniques.
- Increase autoclave pressure to 1.4 bar (20 psi) with vacuum applied.
- Vent to atmosphere and raise pressure to 6.2 bar (90 psi) (or max allowed by the core material).
- Increase air temperature at 3°C (5.4°F)/min and hold for 1 hour at 120°C (248°F)
- Allow to cool to 50°C (122°F) before removal of pressure.
- Exotherm
In certain circumstances, such as the production of thick section laminates rapid heat-up rates or highly insulating masters, Toray E722 can undergo exothermic heating leading to rapid temperature rise and component degradation in extreme cases. Where this is likely, a cure incorporating an intermediate dwell of 1 hour at 90°C (194°F) is recommended in order to minimize the risk.
Safety & Health
- Product Safety And Shelf Life
Product Safety:
Observe established precautions for handling epoxy resins and fibrous materials—wear gloves.
Shelf Life:
- Out Life: 60 days at 20°C (68°F)
- Storage Life: 12 months at -18°C (0°F)
Out life is the maximum time allowed at room temperature before cure
To avoid moisture condensation Following removal from cold storage, allow the prepreg to reach room temperature before opening the polythene bag. Typically, the thaw time for a full roll of material will be 4 to 6 hours.