Fabrication of natural cellulose fiber with flame-retarding capability
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United States of America Patent
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Jul 28, 2015
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Sep 5, 2013
app pub date -
Mar 5, 2012
filing date -
Mar 5, 2012
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Abstract
A fabrication of natural cellulose fiber with flame-retarding capability comprises following steps. Blend pulp and solvent of N-methylmorpholine N-oxide (NMMO) to form slurry. Evaporate extra water content from slurry by a Thin Film Evaporator (TFE) to form dope. By Dry-Jet Wet Spinning, spin and extrude dope for coagulating and regenerating. Water-rinse and dry to form natural cellulose fiber. Soaking roll natural cellulose fiber by flame retardant of N-(hydroxymethyl)-3-(methoxy phosphorus acyl). Orderly dry, bake, neutralize, soaping clean, water rinse, baking dry, soaking rolled, alkaline clean, water rinse, dry and oil the natural cellulose fiber to produce natural cellulose fiber of flame retarding capacity. Because of cross-linking reaction for the flame retardant of N-(hydroxymethyl)-3-(methoxy phosphorus acyl) with natural cellulose fiber, the flame-retarding capability thereof meet requirements of testing standards in American ASTM D6413-1999 and ASTM D2863-1995. Moreover, the wastes thereof meet the requirements of environment protections without harm.
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