Temperature control box for dry spinning of elastic fibers

Abstract

The invention relates to a temperature control box for dry spinning of elastic fibers. The temperature control box comprises a box body and intermediate components. A plurality of polymer solution passages isolated from one another are arranged in the box body longitudinally. Areas, except for the polymer solution passages, in the box body are cavities, and the cavities allow fluid media for heat exchange with polymer solution, used for dry spinning of the elastic fibers, in the polymer solution passages to flow through. Each intermediate component is arranged in one polymer solution passage, and the intermediate components are used for decreasing the temperature difference between different portions of the polymer solution flowing out of the polymer solution passages. According to the technical scheme, the temperature control box for dry spinning of the elastic fibers has the advantages that the temperature difference between different portions of the polymer solution flowing out of the polymer solution passages can be decreased, so that the polymer solution flowing out of the polymer solution passages is constant in temperature and uniform in viscosity, the rheological property of the polymer solution entering spinning nozzles is guaranteed beneficially, tows spun out of the spinning nozzles are enabled to be stable, and further, the quality of produced fibers is improved.

Description

technical field [0001] The invention relates to the field of elastic fiber production, in particular to a temperature control box for elastic fiber dry spinning. Background technique [0002] Spandex is a very widely used elastic fiber. The main function of the temperature control box in the dry spinning production process of elastic fibers such as spandex is to keep the polymer solution in the channel at a constant temperature. For the structure of the existing temperature control box, please refer to Figure 7 , comprising a casing 1a longitudinally provided with a plurality of mutually isolated polymer solution channels 2a, the part of the casing other than the channels is a cavity 3a, and the cavity 3a is passed through for heat exchange with the polymer solution in the channel The fluid medium is provided with a spinneret 4a in the channel. The chemical raw materials required for the production of elastic fibers are polymerized to form a polymer solution. The polymer ...

AI Technical Summary

Problems solved by technology

If the temperature of the polymer solution flowing into the spinneret is not uniform and constant, it will directly affect the viscosity of the polymer solution passing through the channel, and then affect the rheology of the polymer solution entering the spinneret, which may cause The tow is unstable, such as uneven tow thickness, intermittent, etc.

The existing temperature control box has a limited effect on the constant temperature control of the polymer solution, especially with the continuous increase of the dry spinning speed of elastic fiber and the continuous increase of the flow rate of the polymer solution through the temperature control box, the existing temperature control box The temperature control ability is more and more limited

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