WJF Chemicals

Polyaromatic Amide Fiber Paper & Polyester Film Composites are a family of 3-ply laminates of NOMEX^TM paper bonded to both sides of polyester film. It has not only the excellent dielectric and mechanical strength of film’s, but the better tear resistance and excellent adsorption to varnish of paper’s, so it is a reliable kind of F-class insulation material for electrical machines.

*Good heat resistance, can work for a long term under 155℃ for F, H-class insulation.

Typical Properties

Property items	Test methods	Units	Typical Value
Property items	Test methods	Units	NMN-222	NMN-232	NMN-252	NMN-272	NMN-2(10)2	NMN-2(14)2	NMN-3(14)3
1. Visual	The surface should be even and free from wrinkle, blister, adhesive particle and impurity.
2.Dielectric strength	A	kV	≥10	≥11	≥13	≥15	≥20	≥25	≥25
	After Bending	kV	≥8	≥9	≥12	≥13	≥18	≥23	≥23
3. Tensile strength	Machine direction	N/cm	≥160	≥180	≥220	≥270	≥320	≥350	≥320
	MD. after bending	N/cm	≥110	≥130	≥180	≥200	≥280	≥280	≥280
	Cross direction	N/cm	≥110	≥130	≥180	≥200	≥250	≥280	≥250
	CD. after bending	N/cm	≥90	≥110	≥150	≥170	≥200	≥200	≥200
4.Breakdown strength	Machine direction	%	≥10	≥12	≥12	≥12	≥12	≥12	≥12
4.Breakdown strength	Cross direction	%	≥15	≥18	≥18	≥18	≥18	≥18	≥18
5. Adhesion	A		No delamination.
5. Adhesion	180±2℃/10min		No delamination, no bladder,no gel

The product is packed in reinforced carton and sealed in plastic film bag. Please keep dry and in room temperature, fire and dampness proofing. Shelf life is 12 months.

Polyaromatic Amide Fiber Paper & Polyester Film Composite is used not only in slot insulation for motors and generators, also for interval, layer and ground insulation in dry-type transformers.