Composite flame barrier laminate for a thermal and acoustic insulation blanket

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 C for at least 10 min,

(ii) 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

(iii) an inorganic refractory layer;

wherein the inorganic refractory layer of (iii) comprises platelets in an amount of 100% by weight with a dry areal weight of 15 to 50 gsm and a residual moisture content of no greater than 10 percent by weight.

2. The laminate of claim 1 wherein the inorganic refractory layer comprises vermiculite.

3. The laminate of claim 1 wherein the inorganic refractory layer is perforated.

4. The laminate of claim 3 wherein the adhesive bond between the inorganic refractory layer and the polymeric film is at least 1.0 lb/in.

5. The laminate of claim 1 wherein the polymeric film layer is a fluoropolymer, polyimide, polyetheretherketone, or polyetherketoneketone.

6. The laminate of claim 1 wherein the polymeric film layer is metalized on at least one surface.

7. The laminate of claim 1 wherein the adhesive layer contains up to 40 weight percent of a flame retardant ingredient.

8. 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.

9. The laminate of claim 8 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 1 wherein the inorganic refractory layer has a dry areal weight of from 20 to 35 gsm.

11. The laminate of claim 1 wherein the inorganic refractory layer has a moisture content of no greater than 3%.