Toray E721-FR
- Chemical Family
- Epoxy & Epoxy Derivatives
Toray E721-FR is a modified epoxy resin system of medium viscosity for cures at 120°C (248°F), pre-impregnated into high performance fibers such as carbon, glass, and aramid. Toray E721-FR offers excellent structural properties, flame retardancy, and exceptional toughness allowing direct lamination to honeycomb without the use of resin film. Toray E721-FR is designed for structural Applicationss in the motor racing, marine industries, and for a wide range of engineering Applicationss. If fire-retardant properties are not required, consult separate data sheet for Toray E720.
Properties
- Physical Form
- Prepreg
Product families
- Thermoset Prepregs
Other characteristics
- End Uses
Marine Applications, Medical Devices, Motorsport, Tanks
- Functions
- Prepreg
- Polymer Name
- Epoxy Resins & Compounds
- Processing Methods
- Out of Autoclave Prepreg, Vacuum Bagging
- Markets
- Automotive & Transportation
- Consumer Goods
- Healthcare & Pharma
- Industrial
- Exotherm
In certain circumstances, such as the production of thick section laminates, rapid heat-up rates, or highly insulating masters, Toray E721-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.
- Technology
- Composite Materials
- Processing Method
Toray E721-FR can be successfully molded by vacuum bag, autoclave, or matched die molding techniques. In autoclave molding, pressures up to 6.2 bar (90 psi) may be applied.
- Composites End Use
- Marine Applications
- Medical Devices
- Motorsport
- Tanks
- Material Features
- Flame Retardant
- HIGHLIGHTS
Excellent adhesive properties—ideal for honeycomb sandwich construction without the use of a resin film; The resin system used in Toray E721-FR is fire resistant under FAR 25.853 Appendix F material test criteria (ii); Excellent drape—complex shapes easily formed; 60-day shelf life at ambient temperature; Medium tack level—easily laminated onto mold surfaces; Controlled flow—excellent surface finish; Low volatile content—no solvents in manufacturing process
- Recommended Cure Cycle
Cure for 60 minutes at 120°C (248°F). It is recommended that heat-up rates of 2–5°C/min (3.6–9°F/min) are employed. Allow to cool to 60°C (140°F) prior to releasing vacuum and removal from mold
- Recommended Applications
- Sport & Recreation
- Motorsport & Formula 1
- Automotive
- Energy
- Medical
- Consumer Electronics
- Aircraft Interiors
- Industrial
- Composite Materials Functions
- Prepreg
- Composites Processing Methods
- Out of Autoclave Prepreg
- Vacuum Bagging
Technical data
Table 1 of 2
2 rows| Characteristic | Value | Unit |
|---|---|---|
| Tg (DMTA) after 1 hr at 120°C (248°F) Onset | 120 (248) | °C (°F) |
| Tg (DMTA) after 1 hr at 120°C (248°F) Peak tan δ | 138 (280) | °C (°F) |
Table 2 of 2
2 rows| Characteristic | Value | Unit |
|---|---|---|
| Density at 23°C (73.4°F) | 1.34 | g/cm3 |
| Gelation time at 120°C (248°F) | 10 | minute |
