A METHOD OF PREPARING DOPE DYED LYOCELL FIBRE
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United States of America Patent
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Issued Date -
May 11, 2023
app pub date -
Feb 18, 2021
filing date -
Mar 31, 2020
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Abstract
A process for obtaining a dope dyed lyocell fibre can include the steps of (a) mixing one or more pigment with an aqueous organic solvent to obtain a slurry; (b) applying vacuum to said slurry to remove excess water content to obtain a masterbatch (c) mixing the masterbatch obtained in step (b) to a lyocell dope to obtain a pigmented dope; and (d) extruding said pigmented dope of step (c) through a spinneret to form dope dyed lyocell fiber.
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