Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
- Product Type
100°C (212°F) to 125°C (257°F) Cure
Cosmetic High Clarity Toughened Epoxy Component Prepreg
Features & Benefits
- Product Highlights
- Enhanced resin clarity—“white-spot” free
- Toughened system—good mechanical properties
- Controlled tack allows easy repositioning
- Medium temperature cures—100°C (212°F) to 125°C (257°F)
- Tg (DMTA onset) of 140°C (284°F) after 1 hour at 125°C autoclave cur
- 14 days out life at 18°C (64°F)
- 6 months storage life at -18°C (0°F)
Applications & Uses
- Applications
- Composites End Use
- Composites Processing Methods
- Recommended Applications
- Sport & Recreation
- Motorsport & Formula 1
- Automotive
- Consumer Electronics
- Industrial
- Cosmetic and high clarity components
- Door panels, center console, dashboard
- Processing Method
Following removal from refrigerated storage, allow the prepreg to reach room temperature before opening the polythene bag, to avoid moisture condensation. Typically, the thaw time for a full roll of material will be 4 to 6 hours. 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; 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 techniques.
Properties
- Physical Form
- Thermal Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Tg (DMTA) after 1 hr at 125°C (257°F) Onset | 140 (284) | °C (°F) | — |
| Tg (DMTA) after 1 hr at 125°C (257°F) Peak tan δ | 160 (320) | °C (°F) | — |
| Value | Units | Test Method / Conditions | |
| Density | 1.24 (77.4) | g/cm³(lbs./ft³) | — |
Technical Details & Test Data
- Exotherm
In certain circumstances, such as the production of thick section laminates, rapid heat-up rates or highly insulating masters, Toray E731 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: 14 days at 18°C (64°F)
- Storage Life: 6 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.