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US 2014/0248814 A1Published application
Composite flame barrier
AssigneeZoltek Companies, Inc.
InventorAlan Handermann
Life of this patent
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Abstract
A composite flame barrier includes a woven or nonwoven fiber sheet material including flame resistant fibers of oxidized polyacrylonitrile; a mineral hydrate material at least partially embedded within the fiber sheet material. The fiber sheet material may be covered on one or two sides with an outer laminar material. The composite flame barrier is particularly useful in fire-rated wall assemblies, especially those designed to provide two, three and four hour fire-ratings, when tested according to ASTM E-119 or similar testing methods and standards.
Claims15
1-20. (canceled)
A composite flame barrier comprising:
- at least two needlepunched nonwoven felts comprising oxidized polyacrylonitrile flame resistant fibers, each needlepunched nonwoven felt having an inner major surface and an outer major surface;
- and
- a mineral hydrate material at least partially embedded within the at least two needlepunched nonwoven felts, wherein the mineral hydrate material is embedded into the needlepunched nonwoven felts without a low melt adhesive powder or film.
Dependencies are inferred from the claim text.