Polylactic acid bicomponent composite fiber single jet hole spinning pack

Abstract

A polylactic acid double-component composite fiber single-spray-orifice spinning component comprises a cylinder with a top opening and a bottom opening. A compression nut, a melt distribution plate, an upper sand cup, a feed distribution plate, a lower sand cup and a spinneret plate are sequentially disposed inside the cylinder from top to bottom. A limit ring is disposed on the inner wall at the lower end of the cylinder. A seal gasket is disposed between the limit ring and the lower end of the spinneret plate. The compression nut is connected with the upper portion of the inner wall of the cylinder in a threaded manner. The polylactic acid double-component composite fiber single-spray-orifice spinning component has the advantages that the spinning component is reasonable in design, unique in structure, high in spinning efficiency, large in filter area, less prone to vortex generation, less prone to melt breaking during spinning jet, high in part matching precision, stable in work pressure and convenient to demount and mount, melt quality is increased, and spinning production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of chemical fiber spinning, in particular to a polylactic acid two-component composite fiber single-jet hole spinning component. Background technique [0002] Chemical fiber spinning includes spinning melt or solution preparation, fiber forming and winding, and post-treatment processes. The post-processing process includes a series of processes such as stretching of primary fibers, heat setting, and packaging of finished products. [0003] The existing spinning methods include melt spinning and solution spinning. Fiber-forming polymers that generally do not decompose significantly in the molten state are melt-spun, such as polyester fibers, polyamide fibers, and the like. The melt spinning process is simple and the spinning speed is high. The solution spinning method is suitable for the fiber-forming polymer to be decomposed during melting, and the fiber-forming polymer is dissolved in a solvent to obtain...

AI Technical Summary

Problems solved by technology

[0004] The spinning components used in the current two-component composite fiber of polylactic acid have the following defects or deficiencies: 1. The filtration area is small, which affects the efficiency of spinning operations; Eddy current phenomenon is easy to occur in the process; 3. Due to the high viscosity of polylactic acid melt, the stress fluctuation of the melt is large, and the melt is easy to break at the capillary spinneret hole; 4. The mutual positioning of various parts is not very accurate, and the matching accuracy is poor The working pressure is unstable and the disassembly and assembly are not convenient

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