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1.发明申请公开(公告)号：US20220316095A1
公开(公告)日：2022-10-06
申请号：US17620905
申请日：2020-06-15
Applicant: List Technology AG
Inventor： Roland Kunkel , Daniel Witte , Sven König , Manuel Steiner , Weilie Wang
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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