Dyeing process of dry spinning cakes of viscose filaments

Abstract

The invention discloses a dyeing process of dry spinning cakes of viscose filaments, belonging to the technical field of dyeing dry spinning cakes in the dyeing industry, wherein the process comprises the following steps of drying the spinning cakes, installing a cylinder liner, arranging a creel, pre-treating, dyeing, post-treating and tubing; the horizontal distance between outer sides of the dry spinning cakes on each two adjacent yarn posts is controlled at 2-50 mm in the process of arranging a creel; in the pre-treating process water is added into a dye vat to completely immerse the dry spinning cakes and swell the yarns; and the yarns are swollen until the pressure difference between the pressure at the outer side of the dry spinning cake and that in the cylinder liner is at least 0.6 kg. The sealability of the dry spinning cakes is maximized by adopting the complete technical scheme in the invention so as to achieve a uniform state for final dyeing; meanwhile, the efficiency of the whole dry spinning cake dyeing process can be improved; the production cost is greatly reduced; and pollution to the environment is reduced.

Description

technical field [0001] The invention relates to a dyeing process of viscose filament, more specifically, the invention relates to a dry cake dyeing process of viscose filament, which belongs to the technical field of dry cake dyeing in the printing and dyeing industry. Background technique [0002] Viscose fiber uses cotton linters or wood as raw materials to obtain pulp through purification processes such as cooking and bleaching. It is made by a series of production processes such as processing. The main process is as follows: [0003] 1. Preparation of viscose spinning solution: react pulp with concentrated alkali to make alkali cellulose, then react alkali cellulose with carbon disulfide to generate cellulose xanthate; [0004] 2. Spinning forming: the fine flow of viscose extruded through the spinning hole enters the coagulation bath containing acid, the cellulose xanthate is decomposed, and the cellulose is regenerated; [0005] 3. Post-processing: including washing...

AI Technical Summary

Problems solved by technology

[0010] The silk cake in the technical solution of the above-mentioned patent does not take the pressure difference between the pressure outside the dry silk cake and the pressure in the cylinder liner as a control index for swelling effect, and because the past dry silk cake dyeing process does not Control the horizontal distance between the outer sides of the dry silk cakes on adjacent yarn columns, resulting in waste of dyeing liquor and auxiliaries and poor sealing performance, insufficient swelling treatment of dry silk cakes, resulting in poor dyeing uniformity, cost and The quality cannot reach an effective controllable range

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