NON-WOVEN LAYER CONSISTING SUBSTANTIALLY OF SHORT POLYOLEFIN FIBRES

摘要

The invention relates to a non-woven layer that consists substantially of short polyolefin fibres the non-woven layer being a felt with in the plane of the layer substantially randomly oriented fibres with a length of 40-100 mm, a tensile strength of at least 1.2 GPa and a modulus of at least 40 GPa. The invention also relates to a method for the manufacture of this felt and to layered structures in which the felt is used. Layered structures comprising a non-woven layer according to the invention have improved specific energy absorption on impact of ballistic projectiles.