L-303 (LHR)
Modified Epoxy Film Adhesive
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Product Data Sheet Revised 12/20/06
Description
L-303 (LHR) is a 250°F (121°C) curing, modified epoxy film adhesive designed to enhance the flame retardance of aircraft interior structures. L-303 (LHR) provides excellent strength over a wide range of processing cycles, and is suitable to rapid ‘in-hot / out-hot’ cure cycles in heated platen presses.
Advantages of L-303 (LHR)
  • Cure cycles as low as 235°F (113°C), varying heat-up rates, vacuum or positive pressure may be used without a significant reduction in bond joint strength.
  • Low volatile content makes L-303 (LHR) ideally suited for large area sandwich or metal to metal sections.
  • L-303 (LHR) displays excellent environmental resistance to salt spray, high humidity, and standard test fluids.
  Physical Properties
  • Standard Weight: 0.080 lbs/ft2 (390 g/m2)
  • Optional Weights: 0.100 lbs/ft2, 0.120 lbs/ft2(other weights available)
  • Standard Thickness: 0.012” (0.30 mm)
  • Volatile Content: Less than 0.5%
  • Tack: Slightly Tacky
  Availability
  • 48” Wide Rolls x 100 Yards Long (122 cm x 91 m)
  Shelf Life
  • 6 months at 40°F (4°C)
  • 7 days at Room Temperature (70°F or 21°C)
  Cure Cycles
  • 40 minutes at 275°F (135°C), or
  • 60 minutes at 250°F (121°C), or
  • 90 minutes at 235°F (113°C).
 Applicable Documents
  • MMM-A-132
  • MIL-A-25463
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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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