Fabric blends of aramid fibers and flame resistant cellulosic fibers
AssigneeDifco Performance Fabrics, Inc.
InventorFrancois Lapierre
Life of this patent
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Abstract
The instant invention is directed to dyed fabric blends of aramid fibers and flame resistant (FR) cellulosic fibers, which retains a substantial amount of its strength and durability after dyeing. The dyeing process comprises the steps of: providing a fabric comprising a blend of aramid fibers and cellulosic fibers, dyeing the cellulosic fibers of the fabric, and dyeing the aramid fibers of the fabric. Dyeing of the aramid fibers being preformed with low agitation, an aryl ester carrier, and, preferably, at a temperature between 100-110° C.
Claims8
A process for dyeing fabric blends of aramid fibers and cellulosic fibers comprising the steps of:
- providing a fabric comprising a blend of aramid fibers and cellulosic fibers,
- dyeing the cellulosic fibers of the fabric in a dye bath for cellulosic fibers, and
- dyeing the aramid fibers of the fabric in a dye bath for aramid fibers, said dyeing of the aramid fibers being performed with a low agitation process being selected from the group consisting of beam dyeing, jig dyeing, and beck dyeing,
- wherein the dye bath for the cellulosic fibers being different from the dye bath for the aramid fibers and the dyeing steps being performed sequentially.
A process for dyeing fabric blends of aramid fibers and cellulosic fibers comprised in the steps of:
- providing a fabric comprising a blend of aramid fibers and cellulosic fibers,
- dyeing the cellulosic fibers of the fabric in a dye bath for cellulosic fibers, and
- dyeing the aramid fibers of the fabric in a dye bath for aramid fibers, said dyeing of the aramid fibers being performed with a low agitation process being selected from the group consisting of beam dyeing, jig dyeing, and beck dyeing, at a temperature ranging between 100-110° C. and with a carrier selected from the group consisting of aryl esters,
- wherein the dye bath for the cellulosic fibers being different from the dye bath for the aramid fibers and the dyeing steps being performed sequentially.
A process for dyeing an aramid fabric comprising the steps of:
- providing an aramid fabric
- dyeing said fabric by subjecting said fabric to low agitation process, said process being selected from the group consisting of beam dyeing, jig dyeing, and beck dyeing, at a temperature ranging from 100° C. to 110° C. in a dye bath including a dye stuff, and an aryl ester carrier.
Dependencies are inferred from the claim text.