Composite flame barrier laminate for a thermal and acoustic insulation blanket

Patent metadata

Field	Value
Publication number	US-9643711-B2
Application number	US-201514705017-A
Country	US
Kind code	B2
Filing date	May 6, 2015
Priority date	Apr 21, 2009
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A multilayer laminate for use as a flame barrier in an aircraft comprising (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., (iii) an inorganic refractory layer, and (iv) aramid paper comprising from 50 to 90 weight percent of aramid fibers and from 10 to 50 weight percent of meta-aramid binder wherein the inorganic refractory layer of (iii) comprises platelets in an amount of at least 85% 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.

First claim

What is claimed is:

1. A multilayer laminate for use as a flame barrier in an aircraft comprising
(i) a polymeric film layer having a temperature resistance of at least 200 degrees C. for at least 10 minutes,
(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.,
(iii) an inorganic refractory layer having a dry areal weight of 15 to 50 gsm and residual moisture content of no greater than 10 percent by weight, and
(iv) aramid paper comprising from 50 to 90 weight percent of aramid fibers and from 10 to 50 weight percent of meta-aramid binder;
wherein the inorganic refractory layer of (iii) comprises platelets of vermiculite in an amount of at least 90% by weight.

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 adhesion bond between 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 2 wherein the inorganic refractory layer comprises platelets of vermiculite in an amount of at least 95% by weight.

10. The laminate of claim 6 wherein the adhesion bond between inorganic refractory layer and the polymeric film is at least 0.8 lb/in.

11. A thermal acoustic blanket for an aircraft comprising
(i) a core of fibrous batting having first and second outer surfaces,
(ii) a multilayer laminate covering the first outer surface of the core and partially covering the second outer surface of the core, and
(iii) a polymeric backing film covering the portion of the second outer surface of the core not covered by the multilayer laminate, wherein,
the polymeric backing film overlaps and is bonded to the multilayer laminate,
the polymeric backing film can withstand a temperature of at least 200 C for at least 10 min, and
the core has a self- extinguishing time no greater than 10 seconds and a maximum burn length of no greater than 102 mm,
wherein the multilayer laminate of (ii) comprises:
(a) a polymeric film layer having a temperature resistance of at least 200 C for at least 10 min,
(b) an adhesive layer having an dry areal weight of from 2 to 40 gsm having an activation temperature of from 75 to 200 degrees C.,
(c) an inorganic refractory layer having a dry areal weight of 15 to 50 gsm and residual moisture content of no greater than 10 percent by weight and comprising platelets of vermiculite in an amount of at least 85% by weight, and
(d) aramid paper comprising from 50 to 90 weight percent of aramid fibers and from 10 to 50 weight percent of meta-aramid binder.

Assignees

• Du Pont

Inventors

• Richardson Iii Llewellyn Bentley
• Kawka Dariusz Wlodzimierz

Classifications

• B32B2307/3065

  Flame resistant or retardant, fire resistant or retardant · CPC title

• Y10T428/24752

  Laterally noncoextensive components · CPC title

• B32B2264/107

  Ceramic · CPC title

• B32B2371/00

  Polyethers, e.g. PEEK, i.e. polyether-etherketone; PEK, i.e. polyetherketone · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title