Fabric material composite construction for use as a filter means

Abstract

A fabric material composite construction, for use as a filter means or media, characterized in that said construction comprises a combination of one or more nanofiber layers and a synthetic single-thread squarely knitted precision fabric.

1 - 11 . (canceled) 
     
     
         12 . A fabric material composite construction, for use as a filter means or media, characterized in that said construction comprises one or more nanofiber layers supported by a square-mesh knitted precision fabric made of a synthetic single-thread, said nonofibers having a nanofiber diameter from 100 TO 900 nm and said knitted precision fabric having a mesh 5 μm to 2000 μm, thereby said composite construction prevents particles having a particle size from 1 to 2 μm from passing through. 
     
     
         13 . A composite construction, according to  claim 12 , characterized in that said nanofiber layer is coated on said single-thread fabric by an electro-spinning coating method and forms with said supporting a single filtering means. 
     
     
         14 . A composite construction, according to  claim 12 , characterized in that said nanofiber layer is coated on a single side of said fabric or on both sides of said fabric. 
     
     
         15 . A composite construction, according to  claim 12 , characterized in that said nanofiber layer is coated on said fabric after having coated on said fabric an adhesive material. 
     
     
         16 . A composite construction, according to  claim 12 , characterized in that said construction further comprises an additional fabric thereby providing a sandwich fabric arrangement including therein said nanofiber layer. 
     
     
         17 . A composite construction, according to  claim 12 , characterized in that said composite construction provides a filtering means having a filtering efficiency of 99% up to 2 μm, and a high filtering efficiency for particles having a particle size less than 5 μm. 
     
     
         18 . A composite construction, according to  claim 12 , characterized in that said composite construction has an acoustic impedance less than that of synthetic single-thread precision fabrics having a similar mesh size value, said acoustic impedance being less by a factor of 1.5 than that of any prior synthetic single-thread precision fabric. 
     
     
         19 . A composite construction, according to  claim 12 , characterized in that said synthetic single-thread forming said knitted fabric is selected from polyester, polyamide, polypropylene, polyphenylsulphide, PEEK, PVDF and PTFE. 
     
     
         20 . A composite construction, according to  claim 12 , characterized in that said construction comprises organic polymers selected from fluorine polymers, PA 6, PA 6/12, Polyaramide, PUR, PES, PVA, PVAC, PAN, PEO, PS, electroconductive polymers, such as polythiophenes, and/or biopolymers selected from kitosan, keratine, collagen and peptides. 
     
     
         21 . A fabric material construction, characterized in that said nanofibers are processed by a plasma pre-processing step to improve the adhesion of said nanofibers to said supporting fabric. 
     
     
         22 . An apparatus for making a fabric construction, according to  claim 12 , characterized in that said apparatus comprises a filament providing dye arrangement ( 3 ) a polymeric solution vessel, a syringe, a capillary and nozzle assembly, therefrom is ejected a polymeric solution and which operates as a positive electrode, and collector ( 4 ) thereon electrospun nanofibers are collected, and which operates as a counter electrode, characterized in that a distance between said dye arrangement and said counter-electrode is such that said nanofibers are not in a dry condition as they contact said supporting fabric.