Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
- Product Type
50–80°C (122–176°F) Cure
Low Temperature Curing Toughened Epoxy Component Prepreg
Features & Benefits
- Product Highlights
- Low initial cure temperature 50°C to 80°C (122°F to 176°F)
- Medium tack level, easily laminated to mold surface
- Excellent drape—complex shapes easily formed
- 5-day shelf life at ambient temperature
- Good quality surface finish under vacuum bag conditions
- Suitable for processing by autoclave, press molding, and vacuum bag cure
- Low volatile content—no solvents used during processing
Applications & Uses
- Applications
- Composites End Use
- Composites Processing Methods
- Recommended Applications
- Sport & Recreation
- Motorsport & Formula 1
- Automotive
- Energy
- Medical
- Consumer Electronics
- Industrial
- Production of composite structures in the leisure and sporting industries
- Range of engineering Applicationss
- Processing Method
Following removal from refrigerated storage, to avoid moisture condensation, allow the prepreg to reach room temperature before opening the polythene bag. 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 (pinpricked) release film on the prepreg surface; vacuum of 980 mbar (29 inHg) is applied for 20 minutes. Toray E650 can be successfully molded by vacuum bag, autoclave, or matched die molding techniques.
Properties
- Physical Form
- Thermal Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Tg (DMTA) after 4 hours post cure at 140°C (284°F) Onset | 121 (250) | °C (°F) | — |
| Tg (DMTA) after 4 hours post cure at 140°C (284°F) Peak tan δ | 133 (271) | °C (°F) | — |
| Value | Units | Test Method / Conditions | |
| Density (23°C (73.4°F)) | 1.2 (74.9) | 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 E650 prepreg can undergo exothermic heating leading to rapid temperature rise and component degradation in extreme cases. The risk of exotherm increases with lay-up thickness and increasing cure temperature. It is strongly recommended that trials, representative of all the relevant circumstances, are carried out by the user to allow a safe cure cycle to be specified.
- Post Cure
- In Applicationss demanding maximum temperature or environmental resistance, it is essential to develop the glass transition temperature to the maximum level by a suitable post cure
- Ramp from initial cure temperature to 140°C (284°F) at 20°C (36°F)/hr and hold for 4 hours minimum. This post cure will result in a Tg (peak tan δ) of approximately 133°C (271°F)
- Laminates may be post cured unsupported unless the size, shape, and laminate thickness would allow excessive distortion under self-weight
Safety & Health
- Product Safety And Shelf Life
Product Safety:
Observe established precautions for handling epoxy resins and fibrous materials—wear glove.
Shelf Life:
- Out Life: 5 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