Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
- Product Type
120°C (248°F) to 160°C (320°F) Cure
Compression Molding Toughened Epoxy Component Prepreg
Features & Benefits
- Materials Features
- Product Highlights
- Hot-in hot-out press processing
- Good surface finish and esthetics
- Controlled resin flow for ease of processing
- Full Tg of 170°C (338°F) reached in 4 minutes at 160°C (320°F)
- Short cure cycles between 120°C (248°F) to 160°C (320°F)
- Low tack for easy lay-up
Applications & Uses
- Applications
- Composites End Use
- Composites Processing Methods
- Recommended Applications
- Sport & Recreation
- Automotive
- Energy
- Consumer Electronics
- Industrial
- Compression molding
- 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.
Properties
- Physical Form
- Thermal Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Tg (DMTA) after 10 mins at 140°C (293°F) Onset | 159 (318) | °C (°F) | — |
| Tg (DMTA) after 10 mins at 140°C (293°F) Peak tan δ | 193 (379) | °C (°F) | — |
| Tg (DMTA) after 4 mins at 160°C (320°F) Onset | 170 (338) | °C (°F) | — |
| Tg (DMTA) after 4 mins at 160°C (320°F) Peak tan δ | 190 (374) | °C (°F) | — |
| Tg (DMTA) after 5 mins at 150°C (302°F) Onset | 163 (325) | °C (°F) | — |
| Tg (DMTA) after 5 mins at 150°C (302°F) Peak tan δ | 189 (372) | °C (°F) | — |
| Value | Units | Test Method / Conditions | |
| Density | 1.24 (77.4) | g/cm³(lbs./ft³) | ASTM D79213 |
| Flow at 100 psi at 140°C (293°F) | 26.3 | % | ASTM D3531 M |
Technical Details & Test Data
- Recommended Cure Cycle
During compression molding, the resin will flow until the gel-point. After the recommended cure time, a 2-mm (0.78 inch) thick part will have generated a Tg in excess of the cure temperature. The table below provides information regarding gel times and cure times. The absence of cool-down and heat-up rates has obvious benefits for part throughput, facilitating part fabrication efficiency.
- Exotherm
In certain circumstances, such as the production of thick section laminates rapid heat-up rates or highly insulating masters, Toray E732 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 is recommended in order to minimize the risk. Caution must be exercised in ensuring safe dwell temperatures and lay-up procedures are adhered to, especially when molding solid laminates in excess of 5 mm (0.20 in) thickness. Note that the risk of thermal runaway increases with layup thickness and cure temperature.
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: 21 days at 18°C (64°F)
- Frozen 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 prepreg to reach room temperature before opening the polythene bag.