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 relates to a method for depositing a layer (3) of polymeric nanofibers prepared by electrostatic spinning of a polymer solution or melt on electrically nonconductive materials (4). During the electrostatic spinning of a polymer solution or melt the layer (3) of polymeric nanofibers is deposited on a discontinuous layer (2) of hot melt adhesive having a basis weight of 2 to 30 g/m2, deposited on an electrically conductive substrate material (1) and then is covered by an electrically nonconductive material (4), whereupon the composite thus prepared is laminated at a pressure of 10 to 15 N/cm2 and at an elevated temperature, which is higher than the softening temperature of the hot melt adhesive and at the same time lower than the softening temperature of the polymeric nanofibers, whereby during the lamination the hot melt adhesive is transformed into a plastic or liquid state and penetrates through the entire thickness of the layer (3) of polymeric nanofibers to the surface and/or to the inner structure of the electrically nonconductive material (4) and after the adhesive solidifies, it attaches the layer (3) of polymeric nanofibers to this electrically nonconductive material (4), reinforcing the layer (3) of polymeric nanofibers. The invention also relates to a multilayer composite prepared by this method.