Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
- Product Type
- 70°C (158°F) to 120°C (248°F) Cure
- Flexible Cure, Flame Retardant, Toughened Epoxy Resin System
Features & Benefits
- Materials Features
- Product Highlights
- The resin system used in Toray 8020-FR is fire resistant under FAR25.853 Appendix F- vertical burn material test criteria (i)
- Flexible low to medium cure schedules 70°C (158°F) to 120°C (248°F)
- 30 days shelf life at ambient temperature
- Excellent drape—complex shapes easily formed
- Good adhesive properties—ideal for honeycomb sandwich construction without the use of a resin film
- Medium out level—easily laminated onto mold surface
- Controlled flow—excellent surface finish
- 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
- Marine industries
- Wide range of engineering Applicationss
- Processing Method
Toray 8020-FR can be successfully molded by vacuum bag, autoclave or matched die molding techniques. Following removal from refrigerated storage, allow the prepreg to reach room temperature before opening the polythene bag, to avoid moisture condensation. 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 30 mins at 120°C (248°F) Onset: | 121 (250) | °C (°F) | — |
| Tg (DMTA) after 30 mins at 120°C (248°F) Peak tan δ: | 138 (280) | °C (°F) | — |
| Value | Units | Test Method / Conditions | |
| Density at 23°C (73.4°F) | 1.35 | g/cm3 | — |
Technical Details & Test Data
- Recommended Cure Cycle
Increase autoclave pressure to 1.4bar (20psi) with vacuum applied (29 in Hg). Vent to atmosphere and raise pressure to 6.2bar (90psi) (or maximum allowed by core material). Increase air temperature at 2°C (3.6°F)/min to the required dwell temperature (see table and graph on next page). Dwell for the recommended time period and cool to 60°C (140°F) prior to removal of the pressure. To obtain the maximum Tg it is essential that a suitable postcure is carried out. E.g., ramp from the cure dwell temperature to 120°C (248°F) at 20°C (36°F)/hour and hold for 1 hour minimum. Cool to 60°C (140°F) at 3°C (5.4°F) per minute. This will produce a laminate with Tg 121°C (250°F) (DMTA Onset).
- Exotherm
In certain circumstances, such as the production of thick section laminates, rapid heat-up rates or highly insulating masters, Toray 8020-FR 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.
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: 30 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.