Cushion for an aircraft seat

Abstract

A cushion ( 101 ) for use in an aircraft seat, comprises a foam structure having a first region ( 102 ) of a low-density flame retardant foam, a second region ( 103 ) of a flame retardant polyurethane foam and a sealing barrier ( 104 ) disposed at the interface between the first and second regions.

1 . A cushion suitable for use in an aircraft seat, said cushion comprising a foam structure having a first region of a low-density flame retardant foam, a second region of a flame retardant polyurethane foam and a sealing barrier disposed at the interface between said first and second region, wherein said first region comprises foam having a density within the range from 8 to 12 kg/m 3 .  
   
   
       2 . A cushion as claimed in  claim 1 , wherein the second region encloses, at least in part, a core comprising the first region.  
   
   
       3 . A cushion as claimed in  claim 1 , wherein the sealing barrier comprises any of polyethylene, polyurethane or polyvinylchloride.  
   
   
       4 . A cushion is claimed in  claim 1 , wherein the ratio of the volume of the first region to the second region is in the range from 20:80 to 80:20 (volume to volume).  
   
   
       5 . A cushion as claimed in  claim 1 , wherein the ratio of the volume of the first region to the second region is substantially 50:50 (volume to volume).  
   
   
       6 . A cushion as claimed in  claim 1 , wherein the first region comprises foam having a density within the range of 5 to 15 kg/m 3 .  
   
   
       7 . (canceled)  
   
   
       8 . A cushion as claimed in  claim 1 , wherein the first region comprises Melamine foam.  
   
   
       9 . A cushion as claimed in  claim 1 , wherein the second region comprises a foam having a density within the range from 30 to 70 kg/m 3 .  
   
   
       10 . A cushion as claimed in  claim 1 , wherein the second region comprises a foam having a density within the range from 40 to 65 kg/m 3 .  
   
   
       11 . A cushion as claimed in  claim 1 , wherein the second region comprises at least one flame retardant additive.  
   
   
       12 . (canceled)  
   
   
       13 . A cushion as claimed in  claim 1 , wherein a fire blocking layer is provided over at least a part of the second region.  
   
   
       14 . An aircraft seat comprising a cushion as defined in  claim 1 .  
   
   
       15 . A method of manufacturing a cushion suitable for use in an aircraft seat as claimed in  claim 1 , said method comprising the steps of: 
 (i) fabricating the low-density flame retardant foam into the desired configuration;    (ii) coating the surface of said low-density flame retardant foam with a sealant barrier; and    (iii) applying the flame retardant polyurethane foam to the sealing barrier.