Barrier fabric

Abstract

A barrier fabric with a nano-fibrous layer for mechanical retention of organic substances, wherein it is formed by a sandwich structure containing a basic material from unwoven fabric of “spunbond” type with areal weight of 15 to 50 g/m 2 to which at least one nano-fibrous layer is arranged, selected from the group comprising a hydrophilic polymer, a hydrophobic polymer, or in the case of double-layer arrangement, a combination of the hydrophilic polymer in one layer and the hydrophobic polymer in the other layer, and where the nano-fibrous layer is equipped with a protective covering layer, and where the individual layers of the sandwich are connected to each other, and where the nano-fibrous layer used as a barrier against penetration of allergens produced by the dust mites through the upholstery material of mattresses, pillows, bedclothes or soft furnishings, is created by an organic polymer material with areal weight of 0.05 to 0.3 g/m 2 and thickness from 90 to 150 nm, whereas the covering layer is selected from the group involving an unwoven fabric of “spunbond” type, “meltblown” type, cotton textile and/or a mixture of cotton and polyester.

1 . A barrier fabric with a nano-fibrous layer for mechanical retention of organic substances, wherein it is formed by a sandwich structure containing a basic material from unwoven fabric of “spunbond” type with areal weight of 15 to 50 g/m 2  to which at least one nano-fibrous layer is arranged, selected from the group comprising a hydrophilic polymer, a hydrophobic polymer, or in the case of double-layer arrangement, a combination of the hydrophilic polymer in one layer and the hydrophobic polymer in the other layer, and where the nano-fibrous layer is equipped with a protective covering layer, and where the individual layers of the sandwich are connected to each other, and where the nano-fibrous layer used as a barrier against penetration of allergens produced by the dust mites through the upholstery material of mattresses, pillows, bedclothes or soft furnishings, is created by an organic polymer material with areal weight of 0.05 to 0.3 g/m 2  and thickness from 90 to 150 nm, whereas the covering layer is selected from the group involving an unwoven fabric of “spunbond” type, “meltblown” type, cotton textile and/or a mixture of cotton and polyester. 
     
     
         2 . A barrier fabric according to  claim 1 , wherein the nano-fibrous layer is made from the hydrophilic polymer PA6of the polyamide group. 
     
     
         3 . A barrier fabric according to  claim 1 , wherein the areal weight of nano-fibrous layer is within the range from 0.1 to 0.15 g/m 2  and the thickness in the range of 100 nm. 
     
     
         4 . A barrier fabric according to  claim 1 , wherein the nano-fibrous layer comprises the additive of acaricides. 
     
     
         5 . Barrier fabric with a nano-fibrous layer for mechanical capturing of organic substances wherein it is formed by a sandwich structure that comprises a base material from unwoven fabric of “spunbond” type with areal weight of 15 to 50 g/m 2 , at which is arranged at least one nano-fibrous layer, thus creating a barrier against the penetration of microorganisms, including bacteria and viruses through surgery gowns, mouth-screens, coverings or biological filters, where the nano-fibrous layer is formed of an organic hydrophobic polymer material made from polyurethane or from PVDF fluoro-polymer, or by their co-polymers, respectively, with areal weight of 0.05 to 0.2 g/m 2  and thickness ranging from 100 to 250 nm, and where the individual sandwich layers are connected to each other. 
     
     
         6 . A barrier fabric according to  claim 5 , wherein the areal weight of the nano-fibrous layer is within the range from 0.1 to 0.15 g/m 2  and the thickness in the range of 150 to 170 nm. 
     
     
         7 . A barrier fabric according to  claims 5 , wherein the nano-fibrous layer comprises an additive of a germicidal substance. 
     
     
         8 . Barrier fabric with a nano-fibrous layer for capturing of fluids, particularly physiological liquids, wherein it is formed by a sandwich structure comprising a basic material from unwoven fabric of “spunbond” type with areal weight of 15 to 50 g/m 2 , at which is arranged at least one nano-fibrous layer from a hydrophobic polymer material from polyurethane or from PVDF fluoro-polymer, or from their co-polymers, respectively, with areal weight of 2 to 10 g/m 2  and thickness from 100 to 250 nm, whereas the individual sandwich layers are connected to each other. 
     
     
         9 . The barrier fabric according to  claim 8 , wherein the areal weight of the nano-fibrous layer is in the area of 170 nm.