L-791
Woven Phenolic/Aramid Prepreg
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Flammability
  • Self Extinguishing per FAR part 25.853
  Sandwich Properties*
Core: 1/8” cell (3.175 mm) Aramid Phenolic honeycomb; Adhesive: none
Facings: 2 plies L-791-285K each side
  • RT Flatwise Tensile Strength: 140 PSI (1.0 MPa)
  • RT Sandwich Peel Strength: 5 in lb/in (22 N/25 mm)
*Sandwich peel strength varies with the orientation of fibers directly against the core and test direction.
  • Fibers laid up parallel with the test direction produce minimum strengths.
  • Fibers laid up perpendicular to the test direction produce maximum strengths.
  • L-791-285K sandwich peel strength ranges from 4-8 in lb/in (18-36 N/25 mm).
Mechanical Data

 

LAMINATE PROPERTIES

PROPERTY

25 PSI (0.17 MPa) CURE

TEST METHOD

ULTIMATE TENSILE STRENGTH

 

 

Room Temperature (RT)

56 KSI (386 MPa)

ASTM D638

160°F (71°C)

49 KSI (338 MPa)

ASTM D638

 

 

 

TENSILE MODULUS

 

 

Room Temperature (RT)

3.3 MSI (23 GPa)

ASTM D638

160°F (71°C)

3.3 MSI (23 GPa)

ASTM D638

 

 

 

ULTIMATE COMPRESSION STRENGTH

 

 

Room Temperature (RT)

21 KSI (145 MPa)

ASTM D695

160°F (71°C)

20 KSI (138 MPa)

ASTM D695

 

 

 

COMPRESSION MODULUS

 

 

Room Temperature (RT)

3.0 MSI (21 GPa)

ASTM D695

160°F (71°C)

3.0 MSI (21 GPa)

ASTM D695

 

 

 

ULTIMATE FLEXURAL STRENGTH

 

 

Room Temperature (RT)

54 KSI (372 MPa)

ASTM D790

 

 

 

FLEXURAL MODULUS

 

 

Room Temperature (RT)

3.1 MSI (21 GPa)

ASTM D790

 

 

 

  
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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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