Flame blocking liner materials

Abstract

A fire blocking non-woven needlepunched textile structure, comprising a first fiber component containing polyacrylonitrile copolymer with a halogen containing monomer and a second fiber component. The second fiber component is selected such that it supports the first fiber component during burning, optionally including an inorganic filler as a coating for the first and second fiber components. In alternative embodiment, the present invention provides a fire blocking non-woven textile structure containing the above first and second fiber components, blended with a third binder fiber component in the form of a vertically lapped nonwoven structure.

What is claimed is:  
     
         1 . A fire blocking non-woven needle-punched textile structure, comprising a first fiber component containing polyacrylonitrile copolymer with a halogen containing monomer and a second fiber component, wherein said second fiber component supports said first fiber component during burning, optionally including an inorganic filler as a coating for said first and second fiber components.  
     
     
         2 . The fire blocking non-woven textile structure of  claim 1 , wherein said second fiber component is selected from a viscose fiber containing silicic acid and/or a melamine/formaldehyde polymer.  
     
     
         3 . The fire blocking non-woven textile structure of  claim 1 , wherein said halogen containing monomer is poly(vinyl chloride) and/or poly(vinylidine chloride).  
     
     
         4 . The fire blocking non-woven textile structure of  claim 1 , wherein said polyacrylonitrile copolymer contains Sb 2 O 3 .  
     
     
         5 . The fire blocking non-woven textile structure of  claim 1  wherein said polyacrylonitrile copolymer is present at a level of 50-80% (wt).  
     
     
         6 . The fire blocking non-woven textile structure of  claim 1  wherein said textile has a basis weight of 100-500 g/m 2 .  
     
     
         7 . The fire blocking non-woven textile structure of  claim 1  wherein said vermiculate is present at a level of about 20-40 g/m 2 .  
     
     
         8 . The fire blocking non-woven textile structure of  claim 1  wherein the inorganic filler is selected from the group consisting of vermiculate, graphite, fumed silica or silica dioxide, or titanium dioxide.  
     
     
         9 . A fire blocking non-woven textile structure, in the form of vertical lapped batting, comprising a first fiber component containing polyacrylonitrile copolymer with a halogen containing monomer and a second fiber component, wherein said second fiber component comprises a viscose fiber containing silicic acid and/or a melamine-formaldehyde polymer, and a third fiber component comprising a binder fiber having the capability to melt bond the other fibers in the nonwoven structure and wherein said first and second components are melt bonded together by said binder fiber.  
     
     
         10 . The fire blocking material of  claim 9  wherein said polyacrylonitrile copolymer is present at a level of about 50-70% (wt.), said second fiber component is present at a level of about 10-20% (wt.) and said binder fiber is present at a level of about 15-30% (wt.).  
     
     
         11 . The fire blocking material of  claim 10  wherein said polyacrylonitrile copolymer is present at a level of about 60-65% (wt.), said second fiber component is present at a level of about 15-20% (wt.) and said binder fiber is present at a level of about 15-25% (wt.).  
     
     
         12 . The fire blocking material of  claim 9  wherein said textile has a basis weight of 100-500 g/m 2 .  
     
     
         13 . The fire blocking material of  claim 9  wherein said binder fiber comprises one or a plurality of polymer components.  
     
     
         14 . The fire blocking material of  claim 9  wherein said binder fiber comprises a sheath/core, side by side, or monofiliment configuration.