ARAMID NANOFIBER FILAMENTS AND RELATED METHODS
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United States of America Patent
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Issued Date -
Oct 10, 2024
app pub date -
Dec 15, 2023
filing date -
Dec 16, 2022
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Abstract
The disclosure relates to a method for forming nanofiber-assembled filaments in which an aromatic polyamide nanofiber suspension is first formed into wet nanofiber-assembled filaments via wet-spinning and protonation in a coagulation medium including at least one proton donor along with a non-solvent for the aromatic polyamide. The wet nanofiber-assembled filaments are then drawn to reduce/remove voids in the nanofiber-assembled filaments and improve the mechanical properties of the assembled filaments. The method can be used as a recycling method for used aromatic polyamide fiber/filament materials in which the recycled filaments have high/good mechanical properties relative to virgin filament materials.
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