NPN Laminated Nomex Paper

Nomex Insulation Paper (NMN) | High-Temperature Flexible Laminate Insulation

Nomex Insulation Paper (NMN) is a high-performance flexible laminated electrical insulation material designed for Class F and Class H applications. It is a three-ply composite laminate consisting of a polyester film core bonded between two layers of Nomex® aramid paper. This construction provides an excellent balance of thermal endurance, dielectric strength, and mechanical robustness.

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Nomex Insulation Paper (NPN) | High-Temperature Flexible Laminate Insulation

Nomex Insulation Paper (NPN) is a high-performance flexible laminated electrical insulation material designed for Class F and Class H applications. It is a three-ply composite laminate consisting of a polyester film core bonded between two layers of Nomex® aramid paper. This construction provides an excellent balance of thermal endurance, dielectric strength, and mechanical robustness.

Nomex® paper is well known for its outstanding heat resistance and long-term thermal stability, making NMN laminates highly reliable in demanding operating conditions. The polyester film layer contributes excellent mechanical strength, dimensional stability, low moisture absorption, and strong dielectric performance. Together, these layers enhance the efficiency, safety, and service life of rotating electrical machines.

NPN insulation laminates are commonly used in motors and generators operating up to 180 °C, and are widely applied in both production and repair environments. Typical uses include slot liners, wedges, phase insulation, and interlayer insulation in Class H motors and generators, as well as large and specialty Class F motors. NMN can be supplied in rolls, sheets, or cut formats to suit different manufacturing requirements.

Product Details

Product Name

Nomex Insulation Paper (NPN)

Construction

Nomex Paper + Polyester Film + Nomex Paper

Core Layer

Polyester Film (PET)

Insulation Class

Class F / Class H

Thermal Rating

155 °C (Class F) / 180 °C (Class H)

Thickness Range

0.12 mm – 0.50 mm

Supply Form

Rolls, linear metres, custom-cut tapes and parts

Typical Applications

Slot liners, wedges, phase insulation, interlayer insulation

End Use Equipment

Motors, generators, transformers, electrical appliances

Technical Specifications – Laminated Insulation Paper ( NPN )

Properties			Units	Values
Nominal thickness			mm	0.15	0.18	0.20	0.23	0.25	0.30	0.35
Thickness tolerance			mm	±0.02		±0.03			±0.04
Grammage and tolerance			g/m²	180±25	210±30	240±30	260±35	300±40	350±50	430±50
Tensile strength	MD	No bending	N/50mm	≥150	≥160	≥180	≥200	≥220	≥270	≥320
	MD	After bending	N/50mm	≥80	≥110	≥130	≥150	≥180	≥200	≥250
	TD	No bending	N/50mm	≥90	≥110	≥130	≥150	≥180	≥200	≥250
	TD	After bending	N/50mm	≥70	≥90	≥110	≥130	≥150	≥170	≥200
Elongation		MD	%	≥10				≥12
Elongation		TD	%	≥15				≥18
Breakdown voltage		No bending	kV	≥7	≥10	≥11	≥12	≥13	≥15	≥20
Breakdown voltage		After bending	kV	≥6	≥8	≥9	≥10	≥12	≥13	≥16
Bonding property at room temperature			/	No delamination
Bonding property at 180±2°C, 10 min			/	No delamination, no bubble, no adhesive flow
Temperature index of heat resistance (TI)			/	≥155
Quality warranty period			/	Twelve months