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Elmet Technologies

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Park Aerospace Nelcote® E-761 Epoxy Prepreg, 7781 E-Glass Reinforced
Categories: Polymer; Thermoset; Epoxy

Material Notes: Nelcote® E-761 is a versatile self-adhesive epoxy matrix for use in aerospace and commercial application where ease of processing and cost are key considerations.

Key Features and Benefits:

  • Controlled flow for ease of processing
  • Self adhesive for honeycomb or foam sandwich laminates without the use of film adhesive
  • Flexible cure temperature 180°F to 250°F
  • Good electrical properties
  • Flame and fire retardant per FAR 25.853
  • Wet service temperatures up to 160°F

Applications/Qualifications:

  • Radomes
  • Aircraft Interiors
  • Secondary Aircraft Structures
  • Sandwich Panels
  • MRI Resonators
  • Widely specified on commercial and military aircraft programs

Information provided by Park Electrochemical Corp.

Key Words: EP
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesOriginal ValueComments
Volatiles <= 1.5 %
@Temperature 135 °C
8 min
Thickness 9.00 milPer Ply
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Yield 549 - 693 psiFlatwise (sandwich); Bag Surface
 840 psiFlatwise (sandwich); Mold Surface
 47000 psi
@Temperature 93.3 °C
0° Direction, Dry; ASTM D638
 52000 psi
@Temperature 71.1 °C
0° Direction, Wet; ASTM D638
 59000 psi
@Temperature 21.1 °C
0° Direction, Wet; ASTM D638
 65000 psi
@Temperature 71.1 °C
0° Direction, Dry; ASTM D638
 72000 psi
@Temperature 21.1 °C
0° Direction, Dry; ASTM D638
 95000 psi
@Temperature -53.9 °C
0° Direction, Dry; ASTM D638
Tensile Modulus 3300 ksi
@Temperature 71.1 °C
0° Direction, Wet; ASTM D638
 3400 ksi
@Temperature 21.1 °C
0° Direction, Wet; ASTM D638
 3500 ksi
@Temperature -53.9 °C
0° Direction, Dry; ASTM D638
 3700 ksi
@Temperature 21.1 °C
0° Direction, Dry; ASTM D638
 3700 ksi
@Temperature 71.1 °C
0° Direction, Dry; ASTM D638
 3900 ksi
@Temperature 93.3 °C
0° Direction, Dry; ASTM D638
Flexural Strength 65.0 ksi
@Temperature 71.1 °C
Wet; ASTM D790
 66.0 ksi
@Temperature 93.3 °C
Dry; ASTM D790
 77.0 ksi
@Temperature 71.1 °C
Dry; ASTM D790
 80.0 ksi
@Temperature 21.1 °C
Wet; ASTM D790
 95.0 ksi
@Temperature 21.1 °C
Dry; ASTM D790
 117 ksi
@Temperature -53.9 °C
Dry; ASTM D790
Flexural Modulus 2700 ksi
@Temperature 71.1 °C
Wet; ASTM D790
 2800 ksi
@Temperature 93.3 °C
Dry; ASTM D790
 2900 ksi
@Temperature 71.1 °C
Dry; ASTM D790
 3000 ksi
@Temperature 21.1 °C
Wet; ASTM D790
 3200 ksi
@Temperature -53.9 °C
Dry; ASTM D790
 3200 ksi
@Temperature 21.1 °C
Dry; ASTM D790
Compressive Strength 47.0 ksi
@Temperature 71.1 °C
Wet; ASTM D695
 52.0 ksi
@Temperature 93.3 °C
Dry; ASTM D695
 55.0 ksi
@Temperature 71.1 °C
Dry; ASTM D695
 56.0 ksi
@Temperature 21.1 °C
Wet; ASTM D695
 66.0 ksi
@Temperature 21.1 °C
Dry; ASTM D695
 84.0 ksi
@Temperature -53.9 °C
Dry; ASTM D695
Compressive Modulus 3500 ksi
@Temperature 71.1 °C
Wet; ASTM D695
 3500 ksi
@Temperature 71.1 °C
Dry; ASTM D695
 3500 ksi
@Temperature 93.3 °C
Dry; ASTM D695
 3600 ksi
@Temperature 21.1 °C
Wet; ASTM D695
 3600 ksi
@Temperature 21.1 °C
Dry; ASTM D695
 3700 ksi
@Temperature -53.9 °C
Dry; ASTM D695
Shear Strength 5.20 ksi
@Temperature 93.3 °C
Short-Beam, Dry; ASTM D2344
 6.00 ksi
@Temperature 71.1 °C
Short-Beam, Wet; ASTM D2344
 6.50 ksi
@Temperature 71.1 °C
Short-Beam, Dry; ASTM D2344
 8.00 ksi
@Temperature 21.1 °C
Short-Beam, Wet; ASTM D2344
 9.00 ksi
@Temperature 21.1 °C
Short-Beam, Dry; ASTM D2344
 11.5 ksi
@Temperature -53.9 °C
Short-Beam, Dry; ASTM D2344
 
Electrical PropertiesOriginal ValueComments
Dielectric Constant 4.2
@Frequency 9.375e+9 Hz
 4.2
@Frequency 1.80e+10 Hz
Dissipation Factor 0.013
@Frequency 9.375e+9 Hz
 0.013
@Frequency 1.80e+10 Hz
 
Thermal PropertiesOriginal ValueComments
Glass Transition Temp, Tg 115 °CDry; DMA
 
Processing PropertiesOriginal ValueComments
Gel Time 4.00 min
Shelf Life 12.0 Month
@Temperature -17.8 °C
 
Descriptive Properties
Climbing Drum Peel (in-lb/3in)14.7ASTM D1781; Mold Surface, 75°F
 14.8ASTM D1781; Bag Surface, 75°F
Fabric Area Weight (g/m²)303.5
Long Beam Flexure (P/Y lb/in)152 / 124Bag Surface
 201Mold Surface
Long Beam Flexure Strength (lbs)157 / 130Bag Surface
 205Mold Surface
Prepreg Resin Content (%)39
Resin Flow (%)14275°F, 50psi

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PPARK019 / 89291

Ensinger PEI

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