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Ensinger PEI

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Park Aerospace Nelcote® P-670I Polyester Prepreg, 7781 E-Glass Reinforced
Categories: Polymer; Thermoset; Polyester, TS

Material Notes: Nelcote® P-670I is a versatile, non-styrenated/low VOC polyester resin. P670I is used in a wide variety of applications including radomes, tooling and aircraft structures.

Key Features and Benefits:

  • Non-styrenated / low VOC resin system
  • Meets requirements of MIL-R-7575C, grade B class 4
  • Flame retardant formulation
  • Good electrical properties at elevated temperatures
  • Retains good mechanical properties after exposure to high-temperature conditioning (250°F)

Applications/Qualifications:

  • Radomes
  • Tooling
  • Aircraft Structures

Information provided by Park Electrochemical Corp.

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Physical PropertiesOriginal ValueComments
Density 2.00 g/cc
Volatiles <= 2.0 %
@Temperature 104 °C
8 min
Water Absorption 0.68 %24hr immersion in DI H20
 
Mechanical PropertiesOriginal ValueComments
Hardness, Barcol 75
Tensile Strength, Yield 56000 psi
@Temperature 177 °C
0° Direction, Wet; ASTM D638 Type 1
 60000 psi
@Temperature 23.9 °C
0° Direction, Wet; ASTM D638 Type 1
 61000 psi
@Temperature 121 °C
0° Direction, Wet; ASTM D638 Type 1
 70000 psi
@Temperature 23.9 °C
0° Direction, Dry; ASTM D638 Type 1
Tensile Modulus 3300 ksi
@Temperature 177 °C
0° Direction, Wet; ASTM D638 Type 1
 3500 ksi
@Temperature 121 °C
0° Direction, Wet; ASTM D638 Type 1
 3700 ksi
@Temperature 23.9 °C
0° Direction, Wet; ASTM D638 Type 1
 7000 ksi
@Temperature 23.9 °C
0° Direction, Dry; ASTM D638 Type 1
Flexural Strength 36.0 ksi
@Temperature 177 °C
Wet; ASTM D790
 57.0 ksi
@Temperature 121 °C
Wet; ASTM D790
 79.0 ksi
@Temperature 23.9 °C
Wet; ASTM D790
 87.0 ksi
@Temperature 23.9 °C
Dry; ASTM D790
Flexural Modulus 2700 ksi
@Temperature 177 °C
Wet; ASTM D790
 2800 ksi
@Temperature 121 °C
Wet; ASTM D790
 3200 ksi
@Temperature 23.9 °C
Dry; ASTM D790
 3400 ksi
@Temperature 23.9 °C
Wet; ASTM D790
Compressive Strength 54.0 ksi
@Temperature 23.9 °C
Wet; ASTM D695
 58.0 ksi
@Temperature 23.9 °C
Dry; ASTM D695
 
Electrical PropertiesOriginal ValueComments
Dielectric Constant 4.8
@Frequency 9.375e+9 Hz
Dissipation Factor 0.019
@Frequency 9.375e+9 Hz
 
Thermal PropertiesOriginal ValueComments
Flammability Test 5.0inches; Method 2021
 
Processing PropertiesOriginal ValueComments
Gel Time 0.500 - 1.50 min
Shelf Life 3.00 Month
@Temperature 4.44 °C
 6.00 Month
@Temperature -17.8 °C
 
Descriptive Properties
Fabric Area Weight (g/m²)300
Prepreg Resin Content (%)37-43
Resin Flow (%)8-12275°F, 15psi

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 go back to viewing the property data in MatWeb's normal format.

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