Economical fire barrier nonwoven
AssigneeTintoria Piana US, Inc.
InventorsSang-hoon Lim, Andrea Piana
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Abstract
Provided herein is a new fire barrier nonwoven composed of flame retardant (FR) cellulosic fiber(s) and untreated cellulosic fiber(s) and optionally a binder fiber and methods of making the same, wherein the FR cellulosic fiber contains FR chemical(s) or FR compound(s) that have melting point or decomposition temperature at 400° C. (752° F.) or below. The FR performance of the new nonwoven provided herein is comparable to the conventional FR nonwoven (FR cellulosic fiber/binder fiber), but has advantages in cost effectiveness.
Claims21
A fire barrier nonwoven, comprising:
- 10-80 wt % of at least one flame retardant (FR) cellulosic fiber, wherein said at least one FR cellulosic fiber contains or is treated with FR chemicals or FR compounds having a melting point or decomposition temperature at 400° C. (752° F.) or below;
- and
- 10-80 wt % of at least one untreated cellulosic fiber, said at least one untreated cellulosic fiber being the same or different cellulosic fiber used to make said FR cellulosic fiber,
- wherein said at least one untreated cellulosic fiber is selected from the group consisting of cotton, kapok, flax, ramie, kenaf, abaca, coir, hemp, jute, sisal, pineapple, rayon, lyocell, and bamboo, and
- wherein said at least one FR cellulosic fiber and said at least one untreated cellulosic fiber are assembled together as a fiber barrier nonwoven material.
A nonwoven for forming a fire barrier nonwoven, comprising:
- 10-80 wt % of at least one flame retardant (FR) cellulosic fiber, wherein said at least one FR cellulosic fiber contains or is treated with FR chemicals or FR compounds having a melting point or decomposition temperature at 400° C. (752° F.) or below;
- 10-80 wt % of at least one untreated cellulosic fiber, said at least one untreated cellulosic fiber being the same or different cellulosic fiber used to make said FR treated cellulosic fiber, wherein said at least one untreated cellulosic fiber is selected from the group consisting of cotton, kapok, flax, ramie, kenaf, abaca, coir, hemp, jute, sisal, pineapple, rayon, lyocell, and bamboo;
- and
- at least 5 wt % of at least one binder fiber which has a melting temperature below 185° C.
Dependencies are inferred from the claim text.