Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Product Highlights
- High toughness and impact properties
- Excellent tack and drape\
- 1 hour at 135°C (275°F) cure
- 60 days shelf life at ambient temperature
- Excellent surface finish\
- Low volatile content—no solvents used during processing
Applications & Uses
- Applications
- Composites End Use
- Composites Processing Methods
- Recommended Applications
- Motorsport & Formula 1
- Automotive
- Industrial
- Side impact structures
- Mechanically demanding structural Applicationss
Properties
- Physical Form
- Thermal Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Tg (DMTA) after 1 hr at 135°C (275°F) Onset | 118 (244.4) | °C (°F) | — |
| Tg (DMTA) after 1 hr at 135°C (275°F) Peak tan δ | 131 (267.8) | °C (°F) | — |
| Value | Units | Test Method / Conditions | |
| Density (23°C (73.4°F)) | 1.24 (77.4) | g/cm³(lbs./ft³) | — |
Technical Details & Test Data
- Recommended Cure Cycle
- Toray E745 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 2°C (3.6°F)/min and hold for 1 hour at 135°C (275°F).
- Allow to cool to 60°C (140°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 E745 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
- Exotherm
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; 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 techniques.
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.