PREPARATION METHOD AND DEVICE FOR PRODUCING RECYCLED FIBER SPINNING SOLUTION USING SOLVENT METHOD
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United States of America Patent
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Oct 6, 2022
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Jun 15, 2020
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Jun 20, 2019
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Abstract
The invention discloses a preparation method and a production device for producing a recycled fiber spinning solution with using a solvent, which comprises two or more vertical wiped film evaporators (3, 4, . . . ) connected with a single horizontal cylindrical kneading reactor. The aqueous mixture of cellulose and solvent and auxiliary agent is prepared into a spinnable cellulose spinning dope, which is characterized by injecting the material mixture into two or more vertical wiped film evaporators and a horizontal cylindrical kneading reactor, each unit is preferably equipped with a separate condensing system, and the vacuum system can be separately configured to share a vacuum system.
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