Dry-wet spinning process for agar fiber

Abstract

The invention discloses a dry-wet spinning process for agar fiber. The dry-wet spinning process for agar fiber is characterized by comprising the following steps: (1), adding agar into a DMSO or DMF solvent, and stirring at a temperature of 50 to 90 DEG C, so as to obtain an agar solution with the concentration of 10-18 wt percent; filtering and defoaming the solution so as to obtain an agar spinning solution; (2), conveying the prepared agar spinning solution into a spinning box and spraying out the agar spinning solution from the spinneret holes of a spinneret; gelating the liquid sprayed out through an air layer; enabling gelified liquid tricklet to enter into a precipitating bath to form embryo fibre, and then stretching the embryo fibre; soaking, washing, dewatering and airing the embryo fibre through an oiling agent so as to obtain a final fiber material. The dry-wet spinning process provided by the invention has the advantages as follows: due to the adoption of dry-wet spinning, the mechanical strength of the fiber is enhanced. Water is adopted as the precipitating bath, potential safety hazards caused by ethyl alcohol volatilization can be avoided, the solvent can be recovered through underpressure distillation, three wastes cannot be produced during the entire production process, and the dry-wet spinning process for agar fiber is suitable for large scale industrial production.

Description

technical field [0001] The invention relates to a fiber spinning method, in particular to a dry-wet spinning process of agar fiber. Background technique [0002] At present, human society is facing the double huge pressure of energy and environment, and the active development and utilization of natural products has become an important way to alleviate this pressure. [0003] The ocean has a vast area, accounting for about 70% of the earth's surface area, and contains rich biological resources, among which seaweed resources have huge biomass. my country's seaweed cultivation has a history of more than 60 years, and its output accounts for more than 70% of the world. Algae cultivation has created significant economic, social and ecological benefits. [0004] Agar gum is the main economic component of marine red algae. As a kind of seaweed gel product with a wide range of applications, it is widely used in food, medicine, health care, cosmetics, printing and dyeing and other f...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned wet spinning is to prepare the spinning solution from the high polymer, and then spray the spinning solution directly into the coagulation bath through the spinneret to solidify into filaments. During coagulation, cavities are often generated, resulting in low mechanical strength of the fiber.

Moreover, in the above-mentioned spinning process, the ethanol aqueous solution is used as the coagulation bath. Since ethanol is flammable, there are potential safety hazards in the industrial production process, and the requirements for the workshop are relatively high, and the industrialization is difficult.

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