L-591
Low Heat Release Phenolic Prepreg
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Product Data Sheet Revised 12/21/06
Description

L-591 is a modified phenolic prepreg with low heat release properties when tested per FAR part 25.853. L-591 has excellent peel strength without the use of additional adhesive films. L-591 is intended to be used as a single ply or multiple ply skin for aramid/phenolic honeycomb in aircraft interior honeycomb sandwich panels.

Advantages of L-591
  • Creates sandwich panels with high peel strength and high toughness for today’s modern commercial aircraft interiors.
  • The L-591 system processes easily in most plated presses or autoclaves.
  • The hand lay up grade of L-591 is also an excellent laminating prepreg for air conditioning ducting and other interior laminate requirements.
  • L-591 will allow the designer to create complex structure which meets stringent FAR burn requirements using OSU test apparatus.
  Physical Properties on 7781 Glass Fabric
  • Standard Weight: 0.102 lbs/ft2 (498 g/m2)
  • Standard Resin Content: 39% by weight
  • Volatile Content: 9% max
  • Standard Tack: Medium tack
  • Cured Ply Thickness: 0.010” (0.254 mm)
  • Other Weights, Resin Contents, and Fabrics are Available.
 Availability
  • 38", 50" or 60" Rolls 60 Yards in Length (97, 127, or 152 cm x 55 m)
  Shelf Life
  • 6 months at 40°F (4°C)
  • 14 days at Room Temperature (75°F or 24°C)
  Cure Cycles

  • 60 minutes minimum at 260°F (127°C) with full vacuum pressure or higher pressures using press or autoclave. Cool to 170°F (77°C) under pressure.
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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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