L-928
Woven Phenolic Prepreg, Flame Retardant
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Product Data Sheet Revised 04/21/09
Description

L-928 is a 275°F (135°C) curing phenolic prepreg with non-toxic flame retardant additives. L-928 is available on 3K70P style graphite fabric or other styles of woven fabric as requested. L-928 is intended to be used as a single ply or multiple ply skin for aramid/phenolic honeycomb or aluminum honeycomb sandwich panels.

Advantages of L-928
  • When used with L-310FR phenolic adhesive film, L-928 prepreg facings create sandwich panels with high peel strength and high toughness.
  • Processing of L-928 can be easily adapted to most heated presses or autoclaves.
  • L-928 is also an excellent laminating prepreg where heat resistance is a design requirement.
  • When tested per the FAA required OSU test, L-928 will allow the designer to create structures which will meet or exceed these stringent requirements.
  Physical Properties on 3K70P Style Carbon Fabric
  • Standard Weight: 0.069 lbs/ft2 (321 g/m2)
  • Standard Resin Content: 42% by weight
  • Volatile Content: 4-6%
  • Standard Tack: Low tack
  • Cured Ply Thickness: 0.008” (0.203 mm)
  • Other Weights, Resin Contents, and Fabrics are Available.
 Availability
  • Standard: 50" wide x 60 yards long ( 127 cm x 55 m), or
  • 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).
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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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