Patent ID: 8839496
Filing Date: 2014-09-23
Classification: D04H

Abstract:
1. A process for forming a two layer fire blocking non-woven textile comprising: supplying a first carded web providing a first layer of char-forming fibers comprising 5-25% by weight aramid and 95%-75% by weight a viscose fiber containing silicic acid wherein said carded web has a basis weight of 100-350 g/m supplying a second carded web providing a second layer of oxygen-depleting fibers comprising a blend of polyacrylonitrile copolymer with a halogen comonomer and a polyester polymer wherein said polyacrylonitrile copolymer is present in said second carded web at a level of 70% to 30% by weight and said polyester copolymer is present at a level of 30% to 70% by weight and said second carded web has a basis weight of 100-350 g/m forming said two layer fire blocking non-woven textile by the method consisting of feeding said first and second carded web into a needle loom and needle-punching the entirety of said first carded web to said second carded web and forming said two-layer textile wherein said char-forming fibers of said first layer are present in said second layer at a level of 0-5.0% by weight and said oxygen-depleting fibers of said second layer being present in said first layer at a level of 0 to 5.0% by weight; and wherein said non-woven textile has a maximum thickness of 3.0 mm and when applied to a mattress, according to 16 CFR 1633, indicates a peak heat release rate of less than 200 kW within 30 minutes of testing and the total energy released of no more than 15 MJ for the first 10 minutes of testing.