Toray E722
- Chemical Family
- Epoxy & Epoxy Derivatives
Toray E722 is a 120°C (248°F) cure toughened epoxy component prepreg. E722 is designed for structural Applicationss in the motorsport and marine industries. Toray E722 would also suit general aircraft fittings, sporting equipment, and a wide range of engineering Applicationss. Toray E722 is compatible for co-cure with Toray MicroPly™ EF72, a 120°C (248°F) cure resin film, and Toray MicroPly™ SC72A syntactic core. 120°C (248°F) Cure Toughened Epoxy Resin System
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 E722 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 of 1 hour at 90°C (194°F) is recommended in order to minimize the risk.
- Technology
- Composite Materials
- 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. 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 technique
- Composites End Use
- Marine Applications
- Medical Devices
- Motorsport
- Tanks
- Material Features
- Good Surface Appearance
- HIGHLIGHTS
Excellent drapeability—complex shapes easily formed; Good surface finish; Medium tack level—easily laminates to mold surface; Low volatile content—no solvents used during processing; 60 days out life at ambient temperature; Autoclave, vacuum bag, or press curable
- Recommended Cure Cycle
Toray E722 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 3°C (5.4°F)/min and hold for 1 hour at 120°C (248°F); Allow to cool to 50°C (122°F) before removal of pressure.
- Recommended Applications
- Sport & Recreation
- Motorsport & Formula 1
- Automotive
- Medical
- Industrial
- Marine industries
- General aircraft fittings
- Wide range of engineering Applicationss
- 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
1 row| Characteristic | Value | Unit |
|---|---|---|
| Density (23°C (73.4°F)) | 1.21 (75.5) | g/cm³(lbs./ft³) |
