A kind of regenerated cellulose fiber staple

Abstract

The invention discloses a regenerated cellulose fiber short filament. The regenerated cellulose fiber short filament is prepared via spinning of a spinning solution prepared via dissolving of cellulose amino acid methyl ester; dry breaking strength ranges from 2.1 to 2.4cN / dtex, wet breaking strength ranges from 1.1 to 1.3cN / dtex, dry elongation at break ranges from 10 to 15%, dry deviation coefficient of elongation ranges from 8 to 12%, and no residual sulfur is contained. The regenerated cellulose fiber short filament is high-strength low-elongation regenerated cellulose fiber; product performance is excellent; no residual sulfur is contained; and the regenerated cellulose fiber short filament can be applied in people's livelihood industries such as garment fabric, sewing thread, and tire cord.

Description

technical field [0001] The present invention is a kind of regenerated cellulose fiber short filament, specifically relates to the cellulose carbamate fiber short filament obtained by the synthesis, dissolution and spinning of cellulose carbamate in the industrial production process, which belongs to the regenerated fiber The field of production technology of vegan fiber. Background technique [0002] In the textile industry, viscose fiber is one of the first fibers to be industrially produced, and has developed rapidly due to its good performance and low cost. In the traditional viscose production process, a certain amount of pulp raw material reacts with lye to form alkali cellulose, which is then combined with CS 2 Reaction synthesis of cellulose xanthate, preparation of viscose through the steps of dissolution, mixing, filtration, defoaming and aging, etc., and then spinning, post-processing, and other processes to obtain viscose short filaments, involving cellulose xant...

AI Technical Summary

Problems solved by technology

In the industrial production process of viscose fiber, we know that the process improvement of a single link cannot measure the practical value of its industrialization. Taking the above-mentioned synthesis technology of cellulose carbamate as an example, the existing public documents only record The synthetic route of cellulose carbamate, but in actual industrial production, in the process from cellulose carbamate to obtain regenerated cellulose fiber, there are still such as: dissolving, defoaming, spinning, drying, post-processing Therefore, even if cellulose carbamate is prepared by the above synthetic route, it does not represent a complete solution to the energy-saving and environmental protection problems of industrialized production of regenerated cellulose fibers. The following situations may also occur: 1. Cellulose The detection index of the regenerated cellulose fiber obtained after the spinning solution prepared by carbamate is difficult to meet the requirements of downstream products; second, the performance of regenerated cellulose fiber prepared by cellulose carbamate is quite different , it does not adapt to the existing spinneret or drafting equipment in the spinning process, it needs to re-invest in new equipment, and the production cost increases, etc.

[0004] Patent document CN102691125A (a method for preparing regenerated cellulose fiber from cellulose carbamate, 2012.09.26) records that cellulose carbamate is dissolved, frozen, thawed, filtered, defoamed, spun, coagulated , washing and drying to obtain regenerated cellulose fibers. The dry breaking strength of the regenerated cellulose fibers prepared according to this method is 1.44-2.86 cN / dtex, the wet breaking strength is 0.46-0.60 cN / dtex, and the dry breaking elongation It can be seen from the above data that this preparation method faces the following problems: 1. The regenerated cellulose fiber prepared from the above-mentioned regenerated cellulose fiber cannot fully meet the requirements of downstream products such as clothing fabrics and high-strength knitting yarns. Requirements: dry breaking strength ≥ 2.1cN / dtex, wet breaking strength ≥ 1.0cN / dtex, dry elongation at breaking > 12%; Second, the regenerated cellulose fibers prepared by this method belong to low-strength and low-elongation type, and the strength and elongation The elongation rate is low, and spinning is more difficult. In the actual spinning process, the filament bundle extruded through the existing spinneret cannot be used. Therefore, it does not have industrial practical value.

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