Fire resistant fabric composite, process for fire-blocking a...

B - Operations – Transporting – 32 – B

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B32B 5/26 (2006.01) A47C 27/00 (2006.01) D04H 1/00 (2006.01)

Patent

CA 2530151

This invention relates to a fabric composite for use in fire-blocking a mattress, a fire-blocked mattress set, and a process for fire-blocking mattresses; the fabric composite comprising, in order, (a) sacrificial outer ticking, (b) sacrificial cushioning material, and (c) fire-blocking fabric, the fire-blocking fabric being a single layer of nonwoven fabric comprising at least 0.5 ounces per square yard (17 grams per square meter) of a cellulose fiber that retains at least 10 percent of its fiber weight when heated in air to 700 C at a rate of 20 degrees C per minute, and at least 0.5 ounces per square yard (17 grams per square meter) of a heat-resistant fiber. Mattress sets fire-blocked with this fabric composite have a peak heat release rate of less than 150 kilowatts within 30 minutes, preferably less that 150 kilowatts within 60 minutes, and a total heat release of less than 25 megajoules within 10 minutes when tested according to Technical Bulletin 603 of the State of California.

La présente invention a trait à un tissu composite destiné à être utilisé pour l'ignifugeage d'un matelas, un ensemble de matelas ignifugé, et un procédé d'ignifugeage de matelas, le tissu composite comportant, successivement : (a) une toile externe sacrificielle, (b) un matériau de rembourrage sacrificiel, (c) un tissu ignifuge, le tissu ignifuge étant une nappe unique de non-tissé comprenant au moins 0,5 onces par yard carré (17 grammes par mètre carré) de fibre cellulosique qui retient au moins 10 % de son poids en fibre lorsqu'elle est chauffée à l'air jusqu'à 700 ·C à un taux de 20 ·C/minute, et au moins 0,5 onces par yard carré (17 grammes par mètre carré) d'une fibre résistante à la chaleur. Des ensembles de matelas ignifugés avec ce tissu composite présentent un débit calorifique maximal inférieur à 150 kilowatts en 30 minutes, de préférence inférieur à 150 kilowatts en 60 minutes, et un débit calorifique total inférieur à 25 mégajoules en 10 minutes lors d'essai selon le Bulletin Technique 603 de l'Etat de Californie.

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