The Insulation Solution

Data Sheet

Pre-preg NMN 6640-P

Properties and Application:

Prepreg NMN is made by the process of pre-curing NMN(Nomex* + Mylar + Nomex, three layers) with Impregnation of

Hi-temp resistant B-stage Epoxy resin by baking, with long shelf life at room temp, low pre-curing temp & time, excellent

electrical insulation, low moisture absorption, good chemical and thermal resistance. Its insulation glass is F(155c), widely

used for slot insulation, layer insulation and slot closure.

Main Specification:

Properties		Unit	Values
Structure (N+M+N)		mil	2-4-2	3-3-3
Thickness Tolerance		mm	0.22±0.033	0.25±0.037
Weight per unit area		g/m2	270±38	295±40
Tensile strength	MD	Mpa	≥86	≥76
	TD		≥55	≥72
Elongation	MD	%	≥15	≥15
	TD		≥20	≥20
Dielectric Strength		KV	≥12	≥12
Bond strength at room temp. (laminating prod)		No delamination, no blister, no adhesive flow
Solidify condition		The material bond with copper foil well after 2 hours under 120℃
Appearance		Neat and smooth surface, No obvious non-uniform resin, No inclusions against quality, No surface damage at unreeling. No bubbles, folding damage etc.

* Nomex is the remarkable of EI Dupont

Product Supply:

1. Max Width: 907mm, slitting width is available upon request, width tolerance:±1.0mm

2. Packing: 20~60 Kgs/Roll, in Carton and Pallet

3. MOQ: 1,000 Kg in a lot, and 500 Kg each size..

4. Shelf life: 6 months at 25c from the date of delivery. Over the period, it can be still be used if the re-testing is in

agree with the technical requirements. The rolls should stand up, far from heat sources, fire and sunshine

Application Advice:

Note:

1. Above values are the accumulative typical ones by recognized testing method, but, in order to ensure you to

select our products properly, please refer to above specification and test the samples based on your using purpose

or feel free to contact our engineers for further and better understanding.

2. The color is confirmed by samples.

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