NOMEX®

 

NOMEX® - a family of insulation materials adapted to the various needs of the electrical industry

  • Insulation Class 220°C
  • 220 °C Continuous Operation Temperature Resistance (UL 546 B)
  • flame resistant (UL 94 V-O)
  • high mechanical strength

We sell NOMEX®, a high temperature resistant aramid paper and pressboard as an authorized distributor of DuPont for the EMEA region. We are maintaining an extensive stock of all NOMEX® types and thicknesses. Our cutting facility manufactures tapes out of original rolls delivered by DuPont in widths up to 1.854m (73"). Our product portfolio also includes formed parts and adhesive tapes made of NOMEX®.

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Material

NOMEX® is a synthetic, aromatic polyamide polymer (aramide) with a highly stable molecular structure. This affords NOMEX® its excellent dielectric, thermal, chemical and mechanical properties that make it suitable for a wide range of different applications. NOMEX® paper and pressboard have been used for more than 45 years as insulating sheeting in transformers, motors, generators and other electrical equipment, and have demonstrated their overload capability and reliability even under the toughest conditions.
NOMEX® paper is made entirely from aramide polymer in two forms: short fibers (floc) and microscopic fibrous binder particles (fibrids) (Type 411). In a second step, a high-temperature calendaring process is used to compress and cure the NOMEX® paper (Types 410, 414, 356, 818).

Main features

  • Thermal stability: UL approved for use in electrical machines at continuous operating temperatures of up to 220 °C; properties remain virtually unchanged even during continuous operation (UL 546 B). Operation at considerably higher temperatures is also possible for short periods of time.
  • Flame resistant, self extinguishing: NOMEX® products do not melt, and with an LOI value (Limited Oxygen Index) of over 20.8 at 220 °C (the critical value for combustion in normal air) do not support the combustion process (UL 94 V-O).
  • High mechanical stability (tensile strength, stiffness, tear resistance, tear propagation resistance and flexural rigidity) • Inherent dielectric strength: Short-duration loads of 18 to 40 kV/mm possible without further treatment with varnishes or resins.
  • Chemical resistance: NOMEX® is highly resistant to acids and alkalis, and is compatible with all Typees of varnish, adhesive, transformer fluid, lubricating oil and coolant.
  • Low-temperature properties: Due to its unique polymer structure, NOMEX® is used in a wide range of low-temperature applications.
  • Resistant to moisture: In a state of equilibrium with a relative humidity of 95 %, compressed NOMEX® paper and pressboard retains 90 % of its dielectric strength when dry, while many mechanical properties are, in fact, enhanced.
  • Resistant to radiation

Paper

Type 410

Calendared, highly compressed standard type
ApplicationsSlot drive strips, Slot liners, End plates
Layer insulation for transformer construction
Available thicknesses0,05 mm, 0,08 mm, 0,13 mm, 0,18 mm, 0,25 mm, 0,30 mm, 0,38 mm, 0,51 mm, 0,61 mm, 0,76 mm
original roll widths914 mm, 1854 mm

 

Type 411

Uncalendared, soft, highly saturable
ApplicationsPhase insulation, Thermal insulation, Saturable filler
Available thicknesses0,13 mm, 0,18 mm, 0,25 mm, 0,38 mm, 0,58 mm
original roll widths965 mm

 

Type 414

Similar to type 410, more flexible, easier to shape with more
open surface and more absorbent than type 410
Applications Phase insulation, Slot insulation, Layer insulation
Available thicknesses0,18 mm, 0,25 mm, 0,30 mm, 0,38 mm
original roll widths914 mm

 

Type 818 (418)

Special calendared type with 50 % mica resulting in higher dielectric strength and partial-discharge resistance
ApplicationsMedium-voltage motors, Slot insulation, Layer insulation
Available thicknesses0,08 mm, 0,13 mm, 0,20 mm, 0,25 mm
original roll widths914 mm

 

Type 356 (E56)

Calendared type, medium density
Applicationsas with type 410, but with lower mechanical and dielectric strength
Available thicknesses0,08 mm, 0,13 mm, 0,18 mm, 0,25 mm, 0,30 mm, 0,38 mm, 0,51 mm
original roll widths914 mm, 1830 mm

 

Pressboard

 

Type 994 PSB (994)

High density, high mechanical strength
Applications Used as spacers in transformer construction (radial and axial spacers, etc.)
Available thicknesses1,0 mm, 1,5 mm, 2,0 mm, 3,0 mm, 3,2 mm, 4,0 mm, 4,8 mm, 5,0 mm, 6,0 mm, 6,4 mm, 7,0 mm, 8,0 mm, 9,6 mm
sheet sizes355 mm x 1500 mm

 

Type 993 PSB (993)

Medium density, easy to shape and highly saturable
ApplicationsUsed in manufacturing cores and spacers, etc.
Available thicknesses1,0 mm, 1,5 mm, 2,0 mm, 2,4 mm, 3,0 mm, 4,0 mm
sheet sizes1066,8 mm x 1041,4 mm, 1066,8 mm x 2108,2 mm, 1066,8 mm x 3149,6 mm, 1600,2 mm x 1244,6 mm, 1600,2 mm 1574,8 mm

 

Type 992 PSB (992)

Soft, relatively low density, highly saturable
ApplicationsConstruction material with good dielectric and thermal properties
Available thicknesses1,6 mm, 3,2 mm
sheet sizes1066,8 mm x 1041,4 mm, 1066,8 mm x 2108,2 mm, 1066,8 mm x 3149,6 mm, 1600,2 mm x 1244,6 mm, 1600,2 mm 1574,8 mm