Temperature control box for elastic fiber dry spinning

Abstract

A temperature controlled box for use in spandex fiber dry spinning, comprising: a housing (1), where the housing (1) is longitudinally provided with multiple polymer solution channels (2) separated from each other. Areas in the housing (1) other than the polymer solution channels (2) are cavities (3). The cavities (3) are used for circulation of a fluid medium (4) that exchanges heat with a spandex fiber dry spinning polymer solution in the polymer solution channels (2). An intermediate component (5) is provided in each of the polymer solution channels (2). The intermediate component (5) is used for reducing any temperature difference between different portions of the polymer solution outflowing via the polymer solution channels (2). The temperature controlled box for use in spandex fiber dry spinning is capable of reducing the temperature difference between different portions of the polymer solution outflowing via the polymer solution channels, allows the polymer solution outflowing via the polymer solution channels to be at a constant temperature and uniform viscosity, facilitates ensured rheological properties of the polymer solution entering spinning nozzles, and allows the spinning nozzles to steadily extrude a filament bundle, thus increasing the quality of a fiber product so prepared.

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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