SYSTEMS AND METHODS FOR DYEING INHERENTLY FLAME RESISTANT FIBERS WITHOUT USING ACCELERANTS OR CARRIERS
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United States of America Patent
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Issued Date -
Dec 4, 2008
app pub date -
May 8, 2008
filing date -
May 8, 2007
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Abandoned
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Abstract
Systems and methods for dyeing inherently flame resistant fibers, and particularly aramid fibers, without the use of accelerants or carriers. Fabrics made from aramid fibers or blends thereof are immersed in an aqueous dye bath that includes at least one dye and at least one acid component. The temperature of the dye bath is increased from room temperature to a suitable temperature (e.g., between approximately 285.degree. F. to 400.degree. F.) capable of rendering the aramid fibers less crystalline so that the fibers can accept the dye. In this way, suitable color yields may be obtained without the use of accelerants or carriers as have been required in the past.
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