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Rulon Bearings

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DuPont™ Nomex® Type 994, 250 mil Nominal Thickness Rigid Aromatic Nylon Board
Categories: Polymer; Thermoplastic; Nylon (Polyamide PA); Nylon, Aromatic

Material Notes: Type 994 is a densified, rigid board which has a unique combination of superior resistance to compression, even at elevated temperatures, along with relatively high oil absorption characteristics. This combination results in a product which is especially useful as spacers or other structural components in liquid-filled systems.

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Physical PropertiesOriginal ValueComments
Density 1.13 g/ccCalculated number using basis weight and thickness
Thickness 6340 micronsASTM D374, method D, using 17 N/cm²
Linear Mold Shrinkage 0.0020 cm/cmASTM D3392
Linear Mold Shrinkage, Transverse 0.0020 cm/cmASTM D3392
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 84ASTM D2240
Film Tensile Strength at Yield, MD 110 MPaASTM D828
Film Tensile Strength at Yield, TD 72.0 MPaASTM D828
Flexural Strength 8.00 MPaXD; ASTM D790
 9.00 MPaMD; ASTM D790
Flexural Modulus 365 MPaXD; ASTM D790
 415 MPaMD; ASTM D790
Izod Impact, Unnotched 2.85 J/cmXD; ASTM D256
 3.55 J/cmMD; ASTM D256
Compression Set 0.20 %ASTM D3392
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+16 ohm-cmin air; ASTM D257
Surface Resistivity per Square 1.00e+17 ohmin air; ASTM D257
Dielectric Constant 3.5
@Frequency 60 Hz
in air; ASTM D150
Dissipation Factor 0.010
@Frequency 60 Hz
in air; ASTM D150
 
Thermal PropertiesOriginal ValueComments
Oxygen Index 20.8 %
@Temperature 380 °C
Flammability threshold; ASTM D2863
 29 %
@Temperature 220 °C
ASTM D2863
 39 %
@Temperature 25.0 °C
ASTM D2863
 
Descriptive Properties
Basis Weight (g/m²)ASTM D3394
Compressibility (%)1.2ASTM D3392

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