E.i. Dupont De Nemours and Company

Dupont Safety & Construction, Inc.

Radoslaw Szewczyk

Serge Rebouillat

Roger Curtis Wicks

Jean Claude Duart

Laminate structure suitable as electrical insulation comprising a mica-aramid layer of 35-55 wt % mica, 20-60 wt % binder, and 5 to 25 wt % aramid floc, the mica distributed uniformly in the mica-aramid layer; and an aramid layer comprising 35-75 wt % binder and 25-65 wt % aramid floc, the aramid layer being essentially free of mica; wherein the mica-aramid layer has a limiting oxygen index (LOI) of 37% or greater, and the aramid layer has a LOI of 30% or less and having a tensile strength and elongation greater than the mica-aramid layer; and the mica-aramid layer being homogeneously and continuously bound to the aramid layer; the laminate structure having a thickness of at least 0.10 mm, a LOI greater than 32%, and when exposed to a flame to determine LOI, the laminate burns as one piece.

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Lodz, Poland

Radoslaw Szewczyk