Cellulose fiber manufacturing method

By dissolving cellulose in tetraalkylammonium hydroxide at controlled temperatures and spinning into a coagulation liquid at specific temperatures, the method addresses the insufficient strength issue in existing cellulose fiber production, achieving high-strength fibers.

JP2026088608APending Publication Date: 2026-05-29SEIKO EPSON CORP
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Patent Information

Application Number
JP2024201352
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-11-19
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing methods for producing regenerated cellulose fibers do not adequately consider the conditions for production, resulting in insufficient strength of the fibers.

Method used

A method involving dissolving cellulose in a tetraalkylammonium hydroxide solution at temperatures below 45°C and spinning the solution into a coagulation liquid at temperatures below 15°C or 20°C, depending on the embodiment, to enhance the strength of the regenerated cellulose fibers.

Benefits of technology

This approach effectively increases the strength of the regenerated cellulose fibers by optimizing the dissolution and spinning processes, leading to high-strength cellulose fibers.

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Abstract

To provide a method for producing cellulose fibers that can produce high-strength regenerated cellulose fibers. [Solution] A method for producing cellulose fibers, characterized by comprising: a dissolution step of dissolving cellulose in a tetraalkylammonium hydroxide solution at a temperature of less than 45°C to produce a solution; and a spinning step of extruding the solution produced in the dissolution step into a coagulation solution at a temperature of less than 15°C to spin the fibers. Furthermore, it is preferable that the content of tetraalkylammonium hydroxide in the tetraalkylammonium hydroxide solution is 50% by mass or more and 60% by mass or less, and the content of water in the tetraalkylammonium hydroxide solution is 40% by mass or more and 50% by mass or less.
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