Particular flexible insulating materials shaped with heat moulding in hot-drawing extrusion are produced on customer's request.

When folded, the polyester film (PET), like all laminates and coupleds using it, exploits its own "spring effect" which tends to unfold like in origin thanks to the "elastic memory" of the film structure.
The heat moulding process provokes a permanent deformation maintainig the requested shape.

Other materials which don't employ polyester films (PET) like Aramid paper, Kapton, PVC, PP, PC etc are shaped with a cold moulding process with prepreg lines.