A method of depositing a layer of polymeric nanofibres prepared by electrostatic spinning of a polymer solution or melt into electrically non-conductive materials, and a multilayer composite comprising at least one layer of polymeric nanofibres prepared this way

摘要

The invention related to the method of depositing the layer (3) of polymeric nanofibres prepared by electrostatic spinning of a polymer solution or melt into the electrically non-conductive materials (4). The layer (3) of polymeric nanofibres is, during the electrostatic spinning of the solution or the melt of the polymer, deposited on the discontinuous layer (2) of the melted binder with a basis weight of 2-30 g/m.sup.2.n. deposited on the electrically conductive substrate material (1) and then it is covered with the electrically non-conductive material (4), whereupon the composite thus formed is laminated at a pressure of 10 to 15 N/cm.sup.2.n. and at an elevated temperature which is higher than the softening temperature of the melting binder and, at the same time, lower than the softening temperature of the polymeric nanofibres, wherein the melting binder is, during the lamination, converted into a plastic or liquid state and penetrates the entire thickness of the layer (3) of the polymeric nanofibres to the surface and/or into the inner structure of the electrically non-conductive material (4) and, after it has solidified, it joins the layer (3) of the polymeric nanofibres with this electrically non-conductive material (4) and, simultaneously, stiffens the layer (3) of the polymeric nanofibres. The invention further relates also to the multilayer composite prepared this way.