Composite laminate flame barrier for a thermal and acoustic insulation blanket

Abstract

A multilayer laminate comprising in order, a polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, an adhesive layer having an areal weight of from 2 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C. and an inorganic refractory layer wherein the refractory layer comprises platelets in an amount at least 85% by weight with a dry areal weight of 15 to 50 gsm and has a residual moisture content of no greater than 10 percent by weight.

What is claimed is: 
     
         1 . A multilayer laminate for use as a flame barrier layer for an aircraft comprising in order
 (i) a polymeric film layer capable of withstanding a temperature of at least 200 degrees C. for at least 10 min,   (ii) an adhesive layer having an areal weight of from 2 to 40 gsm having an activation temperature of from 75 to 200 degrees C., and   (iii) an unsupported inorganic refractory layer having a dry areal weight of 15 to 50 gsm and a residual moisture content of no greater than 10 percent by weight,
 wherein at least 85% by weight of the unsupported inorganic refractory layer comprises vermiculite platelets. 
   
     
     
         2 . The laminate of  claim 1  wherein the inorganic refractory layer is perforated. 
     
     
         3 . The laminate of  claim 1  wherein the polymeric film layer is a fluoropolymer, polyimide, polyetheretherketone, or polyetherketoneketone. 
     
     
         4 . The laminate of  claim 1  wherein the polymeric film layer is metalized on at least one surface. 
     
     
         5 . The laminate of  claim 1  wherein the adhesive layer contains up to 40 weight percent of a flame retardant ingredient. 
     
     
         6 . The laminate of  claim 1  wherein the adhesive bond between the inorganic refractory layer and the polymeric film is at least 0.25 lb/in. 
     
     
         7 . The laminate of  claim 1  wherein the inorganic refractory layer has a dry areal weight of from 20 to 35 gsm. 
     
     
         8 . The laminate of  claim 1  wherein the inorganic refractory layer has a moisture content of no greater than 3%. 
     
     
         9 . The laminate of  claim 6  wherein the adhesive bond between the inorganic refractory layer and the polymeric film is at least 0.8 lb/in. 
     
     
         10 . The laminate of  claim 9  wherein the adhesive bond between the inorganic refractory layer and the polymeric film is at least 1.0 lb/in. 
     
     
         11 . A flame barrier layer in a vehicle or building structure comprising the multilayer laminate of  claim 1 . 
     
     
         12 . A thermal acoustic blanket for an aircraft comprising the flame barrier layer of  claim 11 . 
     
     
         13 . A cargo liner for an aircraft comprising the flame barrier layer of  claim 11 .