Multilayer fibrous material
The structure punched a material consisting of two cloths with an intermediate layer of a paper or a polymeric film is investigated. Connection of separate layers of a material is executed by a method punch, providing in parallel with it punching of an intermediate layer. It is shown influence of an intermediate layer on formation of an aperture of punctures and orientation of fibres that is connected with friction of fibres and surfaces of an intermediate layer. Air permeability of multilayered materials and its difference from air permeability a punched material without an intermediate layer is investigated.