Songhan Plastic Technology Co.,Ltd.

DuPont™ Nomex® 414 Paper, 3.4 mil Nominal Thickness

Category Other Engineering Material , Composite Fibers , Polymer , Film , Thermoset , Aramid
Manufacturer DuPont
Trade Name Nomex®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF DuPont™ Nomex® 414 Paper, 3.4 mil Nominal Thickness.pdf
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Material Notes:
Nomex® Type 414 is designed for uses requiring a strong, yet flexible and conformable sheet. It is electrically and thermally similar to Type 410. Type 414 was designed as slot insulation in hand-wound motors and for linear wrapping of wire, but is also used where its specific characteristics are desirable, such as folded or punched parts. Nomex® Type 414 is also used in fluid filled transformers due to its improved impregnability compared to Type 410.General NOMEX Information: Nomex® is a family of aromatic polyamide (aramid) fibers. This family consists of staple fibers, continuous filament yarns, paper, and spunlaced fabrics. The paper is produced from two forms of the aramid polymer. Small fibrous binder particles (fibrids) derived directly from the polymer under high shear conditions are mixed with short fibers (floc) which are cut to length from a fiber filament. The floc and fibrids are combined in a water based slurry from which a continuous sheet is produced on a specialized papermaking machine. This initial paper (as in Type 411) is low density and has poor properties. Subsequent densification and internal bonding is achieved by high temperature calendaring. The resulting paper is mechanically strong and has good electrical properties. Some uses for paper product include insulation in electric motors and transformers, wire wrapping, and honeycombed strength members in many aircraft. Nomex® brand fibers are inherently flame resistant: the flame resistance is a polymer property and does not diminish with the life of the fiber.Nomex® meta-aramid, poly(meta-phenyleneisophthalamide), is prepared from meta-phenylenediamine and isophthaloyl chloride in an amide solvent. It is a long chain polyamide in which at least 85% of the amide linkages are attached directly to two aromatic rings. The meta oriented phenylene forms bends in the polymer chain, reducing chain rigidity as compared to the para orientation in the chemically similar Kevlar® chain. This flexible polymer chain gives Nomex® more textile-like qualities while retaining high temperature properties similar to Kevlar®.Information provided by DuPont.
Physical Properties Metric English Comments
Bulk Density 0.880 g/cc
0.0318 lb/in³
Density 0.880 g/cc
0.0318 lb/in³
Thickness 86.4 microns
3.40 mil
94.0 microns
3.70 mil
Typical; ASTM D374
Mechanical Properties Metric English Comments
Film Elongation at Break, MD 7.4 %
7.4 %
Film Elongation at Break, TD 9.78 %
9.78 %
Tear Strength, Total 11.0 N
2.47 lb (f)
Initial in TD; ASTM D1004
22.0 N
4.95 lb (f)
Initial in MD; ASTM D1004
Film Tensile Strength at Break, MD 60.7 MPa
8800 psi
Calculated from mfr's report of 57 N/cm per ASTM D828 and the typical thickness
Film Tensile Strength at Break, TD 30.9 MPa
4480 psi
Calculated from mfr's report of 29 N/cm per ASTM D828 and the typical thickness
Thermal Properties Metric English Comments
Maximum Service Temperature, Air 220 °C
428 °F
Electrical insulation
Electrical Properties Metric English Comments
Volume Resistivity 1.00e+15 ohm-cm
1.00e+15 ohm-cm
50% RH; tested on 10 mil thickness sample; ASTM D257
Dielectric Constant 1.7

@Frequency 60 Hz

@Frequency 60 Hz

@Frequency 1000 Hz

@Frequency 1000 Hz
Dielectric Strength 24.0 kV/mm
610 kV/in
AC Rapid Rise; ASTM D149
43.0 kV/mm
1090 kV/in
Full-wave Impulse; ASTM D3426
Dissipation Factor 0.0050

@Frequency 60 Hz

@Frequency 60 Hz
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