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L-291
Phenolic Fiberglass Prepreg |
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| Shelf Life |
- 6 months at 40°F (4°C) or below
- 14 days at Room Temperature (70°F or 21°C)
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| Cure Cycle |
Press Cure:
- Heat press to minimum 260°F (127°C)
- Insert panel or assembly into press. Close with 40 PSI (0.275 MPa) or Greater
- Bump panel after 1 minute to release trapped volatiles generated from cure
- Repeat as necessary until gas becomes negligible
- Cure for 60 minutes at 260-270°F (126-132°C)
- Cool to 170°F (77°C) under pressure, remove
Autoclave Cure:
- Use plenty of breather in vacuum bag (no bleeder limits resin loss)
- Apply full vacuum to part in autoclave
- Ramp to 260°F (126°C) at 3-7°F/minute (2-4°C/minute) under pressure
- Use 35 PSI (0.241 MPa) or greater autoclave pressure during ramp and cure
- Cure for 60 minutes at 260-270°F (127°-132°C)
- Cool to 170°F (77°C) under pressure, remove
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| Flammability |
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Self Extinguishing per FAR Part 25.853 |
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NOTICE:Product data and parameters cited in this publication have been obtained in J.D. Lincoln, Inc. laboratories using the materials under carefully controlled conditions. The information, therefore, is believed to be accurate and correctly stated. Data of this type may be considered to be indicative of representative properties obtainable. J.D. Lincoln, Inc. cannot accept responsibility for the misapplication of these products, nor for their use under uncontrolled conditions. Numerical values resulting from the application of this material are dependant on processing details. It is recommended that the user develop his or her own application techniques and generate data consistent with his or her specific application and process.
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