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Park Aerospace Nelcote® E-746 Epoxy Prepreg, 7781 E-Glass Reinforced
Categories: Polymer; Thermoset; Epoxy

Material Notes: Nelcote® E-746 is a modified epoxy resin system designed to retain excellent mechanical properties after extended exposure to high temperature. E-746 has a proven history in many demanding aerospace applications.

Key Features and Benefits:

  • Excellent retention of mechanical properties after long-term high temperature exposure
  • Soft tack and drape properties
  • Long ambient out-time for maximum process flexibility
  • Good electrical properties for RF applications
  • Meets requirements of MIL-R-9300B Type II

Applications/Qualifications:

  • Secondary Aircraft Structures
  • Radomes
  • Nacelles
  • Inlet Ducts
  • Fairings
  • Meets SS9578 and GMS4001 specifications.

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 PropertiesMetricEnglishComments
Volatiles <= 2.0 %
@Temperature 163 °C
<= 2.0 %
@Temperature 325 °F
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Yield  310 MPa
@Temperature 177 °C
45000 psi
@Temperature 350 °F
0° Direction, Dry, Autoclave; ASTM D638
 310 MPa
@Temperature 216 °C
45000 psi
@Temperature 420 °F
0° Direction, Dry, Autoclave; ASTM D638
 310 MPa
@Temperature 260 °C
45000 psi
@Temperature 500 °F
0° Direction, Dry, Autoclave; ASTM D638
 345 MPa
@Temperature 138 °C
50000 psi
@Temperature 280 °F
0° Direction, Dry, Autoclave; ASTM D638
 448 MPa
@Temperature 23.9 °C
65000 psi
@Temperature 75.0 °F
0° Direction, Dry, Autoclave; ASTM D638
Flexural Strength  138 MPa
@Temperature 260 °C
20000 psi
@Temperature 500 °F
Dry, Autoclave; ASTM D790
 207 MPa
@Temperature 216 °C
30000 psi
@Temperature 420 °F
Dry, Autoclave; ASTM D790
 276 MPa
@Temperature 177 °C
40000 psi
@Temperature 350 °F
Dry, Autoclave; ASTM D790
 517 MPa
@Temperature 138 °C
75000 psi
@Temperature 280 °F
Dry, Autoclave; ASTM D790
 621 MPa
@Temperature 23.9 °C
90000 psi
@Temperature 75.0 °F
Dry, Autoclave; ASTM D790
Compressive Strength  345 MPa
@Temperature 138 °C
50000 psi
@Temperature 280 °F
Dry, Autoclave; ASTM D695
 517 MPa
@Temperature 23.9 °C
75000 psi
@Temperature 75.0 °F
Dry, Autoclave; ASTM D695
Shear Strength  20.7 MPa
@Temperature 177 °C
3000 psi
@Temperature 350 °F
Short-Beam, Dry, Autoclave; ASTM D2344
 47.6 MPa
@Temperature 23.9 °C
6900 psi
@Temperature 75.0 °F
Short-Beam, Dry, Autoclave; ASTM D2344
 
Electrical PropertiesMetricEnglishComments
Dielectric Constant 4.2
@Frequency 9.375e+9 Hz
4.2
@Frequency 9.375e+9 Hz
Dissipation Factor 0.016
@Frequency 9.375e+9 Hz
0.016
@Frequency 9.375e+9 Hz
 
Thermal PropertiesMetricEnglishComments
Glass Transition Temp, Tg 180 °C356 °FLaminate; standard cure
 230 °C446 °FLaminate; post cure
 
Processing PropertiesMetricEnglishComments
Gel Time 1.00 - 3.00 min1.00 - 3.00 min
Shelf Life 12.0 Month
@Temperature -17.8 °C
12.0 Month
@Temperature 0.000 °F
 
Descriptive Properties
Fabric Area Weight (g/m²)300
Prepreg Resin Content (%)34-40
Resin Flow (%)7-21325°F, 50psi

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PPARK011 / 89283

Specialty Compounds RTP Company

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