NMN Composite Insulation Paper For Transformer

NMN composite insulation paper for transformer is one of the preferred materials for high-end transformer insulation. The name NMN derives from its three-layer structure: Nomex paper – Mylar film – Nomex paper. Nomex is an aramid paper brand owned by DuPont of the United States, featuring a Class H (180℃) temperature resistance grade and excellent flame retardancy. We use genuine DuPont Nomex paper rather than domestic substitutes, and we can provide raw material procurement certificates to prove this. NMN is an indispensable material for high-end transformer projects requiring Class H temperature resistance and UL94 V0 flame retardancy.

Last year, a manufacturer of new energy vehicle drive motors contacted us, as their motors required insulation materials with Class H temperature resistance and UL94 V0 flame retardancy. We sent NMN samples, which passed all tests after a two-month testing period by the customer. Now they place a stable monthly order of 2 tons, with a price 4,000 RMB per ton lower than their previous supplier of trading companies – this is the core advantage of being a source factory. We baked NMN in a 180℃ oven for 72 hours, and its tensile strength only decreased by 8%, while the industry standard allows a maximum decrease of 15%, meaning our performance far exceeds the standard. The breakdown voltage stably reaches above 12kV against the standard requirement of 10kV.

• Insulation of new energy vehicle drive motors
• Interlayer insulation of Class H dry-type transformers
• Insulation of traction motors and mining motors
• Insulation of electrical equipment operating under special high-temperature environments
• Power equipment requiring high flame retardancy grades

Our factory has many years of experience in insulation material production with a technical team whose core technicians have over 20 years of experience in insulation material R&D. The composite process for NMN composite paper has extremely high requirements: the lamination between Nomex paper and Mylar film must be uniform without bubbles or wrinkles, otherwise insulation performance will be compromised. We adopt high-performance three-in-one composite machines for one-step three-layer forming, delivering far more uniform lamination than small factories that complete lamination in two separate processes. Our annual production capacity reaches 1,000 tons with a monthly capacity of 200 tons, enabling on-time delivery of large orders.

NMN offers extensive customization options. Thickness ranges from 0.08mm to 0.45mm with thickness tolerance controlled within ±0.005mm. Width spans a maximum of 1600mm down to a minimum of 2.3mm with width tolerance of ±0.2mm, much tighter than the ±0.5mm tolerance offered by most competitors. Flexible supply formats include rolls, sheets and strips. We are also equipped with stamping forming machines to stamp NMN into various special-shaped parts per your drawings for direct assembly, eliminating secondary processing steps and material losses. OEM services are fully supported, with packaging customized to your specifications.

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