Process for pretreating reclaimed cotton fibers to be used in the production of molded bodies from regenerated cellulose
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United States of America Patent
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Jun 11, 2019
Grant Date -
Aug 18, 2016
app pub date -
Nov 18, 2014
filing date -
Nov 26, 2013
priority date (Note) -
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Abstract
A process for pretreating reclaimed cotton fibers to be used in the production of molded bodies from regenerated cellulose, characterized by effective metal reduction and adjustment of the degree of polymerization and brightness, including a metal removing stage and an oxidative bleaching stage of the reclaimed cotton fibers or pulp produced thereof. Reclaimed cotton fibers treated according to the described process may be used alone or in blends with conventional dissolving pulp as raw material for the production of molded bodies from regenerated cellulose. The process enables technically smooth, safe, and economically feasible spinning via the Viscose or Lyocell process, therefore, the current invention provides an efficient recycling pathway for cotton waste materials.
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