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L-556FR
Heat Resistant Epoxy Prepreg, Flame Retardant |
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| Cure Cycles |
- 90 minutes at 350°F (177°C), or
- 120 minutes at 300°F (149°C), or
- 180 minutes at 275°F (135°C), or
- Typical Cycle:
From room temperature (70°F or 21°C) raise to 350 +0/-10°F (177 +0/-6°C) in 70-140 minutes, hold at 350 +0/-10°F (177 +0/-6°C) for 120 ± 10 minutes. This cure is in an autoclave, blanket press, or platen press at 45-85 PSI (310-586 MPa).
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| Mechanical Data |
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LAMINATE PROPERTIES |
PROPERTY |
40 PSI (0.276 MPa) Cure |
TEST METHOD |
ULTIMATE TENSILE STRENGTH |
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Room Temperature (RT) |
61 KSI (421 MPa) |
ASTM D638 |
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TENSILE MODULUS |
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Room Temperature (RT) |
3.7 MSI (26 GPa) |
ASTM D638 |
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ULTIMATE COMPRESSION STRENGTH |
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Room Temperature (RT) |
50 KSI (345 MPa) |
ASTM D695 |
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ULTIMATE FLEXURAL STRENGTH |
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Room Temperature (RT) |
104 KSI (717 MPa) |
ASTM D790 |
350°F (177°C) |
58 KSI (400 MPa) |
ASTM D790 |
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FLEXURAL MODULUS |
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Room Temperature (RT) |
3.4 MSI (23 GPa) |
ASTM D790 |
350°F (177°C) |
3.2 MSI (22 GPa) |
ASTM D790 |
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SHORT BEAM SHEAR STRENGTH |
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Room Temperature (RT) |
9.9 KSI (68 MPa) |
ASTM D2344 |
CAUTION: Do not build any section of L-556FR over 0.250” (6.35 mm) thick. Please contact the J.D. Lincoln, Inc. company for special curing requirements for parts thicker than 0.250” (6.35 mm).
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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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