L-728
Woven Phenolic Prepreg
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Product Data Sheet Revised 12/20/06
Description

L-728 is a modified phenolic prepreg with excellent fire, smoke and toxicity properties. L-728 is the result of development aimed at creating a new generation of aircraft interior prepregs. L-728 is intended to be used as a single ply or multiple ply skin for aramid/phenolic honeycomb sandwich panels or in laminates.

Advantages of L-728
  • When used with L-310FR phenolic adhesive film, L-728 prepreg facings create sandwich panels with high peel strength and high toughness.
  • Processing of L-728 can be easily adapted to most heated presses or autoclaves.
  • L-726 is also an excellent laminating prepreg for air conditioning ducts and other interior laminate applications.
  • L-728 will allow the designer to create complex structure which meets stringent FAA requirements.
  Physical Properties on 285 Style Aramid Fabric
  • Standard Weight: 0.070 lbs/ft2 (341 g/m2)
  • Standard Resin Content: 50% by weight
  • Volatile Content: 8-14%
  • Standard Tack: Medium tack
  • Cured Ply Thickness: 0.010” (0.254 mm)
  • Other Weights, Resin Contents, and Fabrics are Available.
 Availability
  • Up to 60” width in rolls up to 100 yards long (152 cm x 91 m)
Shelf Life
  • 6 months at 40°F (4°C) or below
  • 14 days at Room Temperature (70°F or 21°C)
Cure Cycles
  • 60 minutes at 275°F (135°C), or
  • 120 minutes at 260°F (127°C).
Flammability
  • 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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