Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Applications & Uses
- Markets
- Applications
- Composites End Use
- Composites Processing Methods
- Applications
- Remove material from cold storage at least 20 hours prior to use to allow for stabilization at room temperature. Keep the material wrapped to prevent moisture from condensing on the adhesive. If details are cut and replaced into cold storage, shorter stabilization times may be used. Cut the prepreg to size, remove the poly separator and apply to part or mold. Remove separator paper. Continue process until the desired number of plies are obtained. Debulking is recommended after every 5 – 20 plies. The material may be debulked at temperatures up to 120° F. When lay-up is complete, the prepreg can be cured in a vacuum bag in an oven or autoclave. Apply at least 10 psi pressure and cure for one hour at 250°F.
Properties
- Physical Properties
- Mechanical Properties
| Value | Units | Test Method / Conditions | |
| Volatiles | max. 1 | % | — |
| Separator | Release paper and poly film | — | — |
| Resin Content | Nominal 50% on 7781 glass, material can be supplied at other resin contents as required | — | — |
| Standard Roll | Widths up to 60 inches wide available | — | — |
| Value | Units | Test Method / Conditions | |
| Tensile Strength at 75°F (24°C) | 63400 | psi | — |
| Tensile Modulus at 75°F (24°C) | 3.5 X 106 | psi | — |
| Compressive Strength at 75°F dry | 48600 | psi | — |
| Flexural Strength at 75°F (24°C) | 80100 | psi | — |
| Flexural Modulus at 75°F (24°C) | 3.0 X 106 | psi | — |
| Interlaminar Shear Strength at75°F dry | 7450 | psi | — |
Technical Details & Test Data
- Cure Cycle
DA 4090 and DA 4902 can be cured at 250°F (121°C) for one hour, however shorter cures are possible at higher temperatures The prepreg may be cured using either standard heat-up methods or by in-hot, out-hot press applications. A pressure of 30 psi is recommended, however pressures of 10 to 50 psi may be used.
Storage & Handling
- Shelf Life
- 6 Months (40°F), 1 Year (0°F), 30 Days (72°F)
- Storage
Store DA 4090 | DA 4092 material in a contaminate free container and store at O degrees F for extended storage. For shorter storage time requirements store at 40 degrees F, this enables quicker stabilization times.