6640 Nmn Nomex Paper DuPont Nomex/Polyester Film

6640 composite material is made of two layer of du pont nomex paper with one of polyester film
Class f insulation (155ºC)
Excellent heat resistance, dielectric property and mechanical strength \good cutting and overhead resistance, high stiffness good compatibility with insulation varnish.
As slot, interturn and liner insulation, f-grade motor and electric appliances.
Nmn: 0.15mm-0.40mm form: Rolls
Width 914mmm, sheets strips (width>5mm)
Nmn insulation material-insulation paper consists of pet film, covered on both sides with calandered nomex1 paper. Nmn is a combined flexible material of thermal rating class f (155) with excellent mechanical properties like high tensile strength and high edge tear resistance combined with high electrical strength.
Nmn has a smooth surface which allows a trouble free manufacture of low voltage motors where coil shooting machines are used.
Nmn is mainly used as a slot liner, slot closure and phase insulation in the production of low voltage motors. Besides this nmn is used as interlayer insulation in transformers and other electrical machines and appliances.

NO	Properties			Unit	Values
1	Nominal Thickness			mm	0.15	0.18	0.2	0.23	0.25	0.3	0.35
2	Thickness Tolerance			mm	± 0.02		± 0.03			± 0.04
3	Nominal Grammage			g/	180± 25	210± 30	240± 30	260± 35	300± 40	350± 50	430± 50
4	Tensile Strength	MD	No Bending	N/10	≥ 150	≥ 160	≥ 180	≥ 200	≥ 220	≥ 270	≥ 320
			After Bending	mm	≥ 80	≥ 110	≥ 130	≥ 150	≥ 180	≥ 200	≥ 260
		TD	No Bending		≥ 90	≥ 110	≥ 130	≥ 150	≥ 180	≥ 200	≥ 250
			After Bending		≥ 70	≥ 90	≥ 110	≥ 130	≥ 150	≥ 170	≥ 200
5	Elongation	TD		%	≥ 10		≥ 12
		MD			≥ 15		≥ 18
6	Breakdowm Voltage	TD		KV	≥ 7	≥ 10	≥ 11	≥ 12	≥ 13	≥ 15	≥ 20
		MD			≥ 6	≥ 8	≥ 9	≥ 10	≥ 12	≥ 13	≥ 16
7	Bond Strength at 25C				No delamination
8	Bond Strength at 155C				No delamination, no blister, no adhesive flow
9	Temperature				≥ 180