Compound vertex spinning method for film silkening

Abstract

The invention relates to a compound vertex spinning method for film silkening, pertaining to the technical field of weaving. A film cutting drafting device is arranged above a front roller pulling jaw of each drawing mechanism of a vortex flow spinner. A cutting region is formed between a cutting-endurable ring and a cutting roller of a film placing and cutting device. Uniformly-expanded stripped-shaped multifilaments are cut and silken to form a film. The conventional linear discharge and filamentation method for spinneret holes is changed. The multifilaments are drafted and thinned through a first drafting region and a second drafting region to form improved and thinned micro-nano strands. The micro-nano strands of multifilaments and short fibers outputted out of a drafting region of the vortex flow spinner are fully mixed. Short fiber heads of fiber strands clamped by strands enter a hollow yarn-guiding channel of a static spindle of a vortex spinner. The tail ends of short fibers are wounded around strands and short fiber head ends so that vortex compound yarns are formed with micro-nano strands uniformly mixed with the short fibers. The difficulty that filaments, nanofibers and conventional staple fibers are difficult to be mixed uniformly and twisted during vortex compound spinning is solved. Therefore, a film industry and a weaving industry are effectively merged.

Description

technical field [0001] The invention relates to a vortex composite spinning method for forming membrane filaments, which belongs to the technical field of textiles. Background technique [0002] Textile fibers can be divided into natural fibers and chemical fibers according to their sources; chemical fibers generally include recycled fibers and synthetic fibers. Among them, man-made fibers refer to natural polymers that originally existed in nature. Because the length and thickness of the macro-aggregated form cannot meet the requirements of textile processing, it needs to be re-assembled by chemical methods to form fibers to meet the requirements of textile processing. Such as regenerated cellulose fibers, various viscose fibers, etc.; synthetic fibers refer to petrochemical small molecules as raw materials, chemically synthesized polymers, and then processed into chemical filaments through spinning processes. The production of chemical filaments can be divided into melt s...

AI Technical Summary

Problems solved by technology

However, there are limitations and bottlenecks in the existing vortex spinning technology: First, the fiber strands are introduced into the vortex chamber without adding twist, and the fiber strands entering the vortex chamber are drawn by the air flow during the vortex yarn forming process. Part of the fibers can overcome the frictional cohesion of the surrounding fibers and separate from the yarn body, and are discharged with the airflow entering the discharge channel to form tow fibers, resulting in a decrease in yarn forming quality and waste of raw materials; The yarn tail is twisted and twisted at high speed in a ring, which belongs to free-end non-holding spinning, which leads to insufficient holding force on fibers during spinning, low degree of internal and external transfer of fibers, poor degree of fiber cohesion, and low spinning strength , fibers with poor cohesion and high stiffness cannot be formed into yarn

However, the shape and scale of the nanofiber itself is too thin, and the absolute strength of the fiber is low. In particular, carbon nanofibers are characterized by high brittleness, which leads to serious damage and destruction of the pure nanofibers after they are twisted and twisted into yarns. It is reported that nanofibers are twisted. There are many torsion and fractures of nanofibers during yarn formation, and the mechanical advantages of nanofibers have not been exerted, and the spun yarns are far below the expected theoretical effect

Based on the technical problems and bottlenecks of pure nanofiber yarn, the China Intellectual Property Office published an invention patent on November 01, 2012, "Spinning Device and Spinning Method for Nanofiber and Filament Composite Yarn", patent application number ZL201210433332.X , the application provides a method of introducing filaments to two nanofiber receiving trays while electrospinning, so that the nanofibers adhere to the two nanofilaments, and then add the two filaments Twisted and combined to obtain a filament / nanofiber composite yarn with ultra-high specific surface area of ​​nanofibers and high-strength properties of filaments; although this application overcomes the problem that nanofibers have low strength and are difficult to purely spin into yarns, but It only involves the twisting of spinning filaments and nanofibers into yarns, while the conventional large-scale textile processing is natural and chemical short fiber spinning, so the processing and application range involved in this application is narrow, and the conventional short fiber in the textile industry has not been solved and realized. Nanocomposite spinning production

Based on the above-mentioned technical problems and bottlenecks, especially the technical production requirements of composite yarns made of nanofibers and conventional cotton fibers, the China Intellectual Property Office published an invention patent "a preparation method of nanofiber blended composite yarn" on November 20, 2013. , patent application number ZL201310586642.X, the application public case proposed a method in the carding process, using electrostatic nano-spinning to directly spray onto the cotton net output by the carding machine, mixed with the cotton net to make cotton / nano fiber strips, and then A method of making blended composite yarns from cotton / nanofiber strips through roving, spun yarn and other processes. This method seems to be simple and effectively composites nanofibers and cotton fibers together, but this method has inherent principles and actual production Problem: The key problem is that nanofibers have a large specific surface area and strong adhesion and cohesion with conventional cotton fibers. In this case, it will be difficult for the cotton fibers to be free during the drafting process of the roving and spinning processes. , smooth relative slippage, frequent hooks, difficult drafting, uneven drafting, etc., resulting in poor quality of the final twisted yarn, which cannot realize the production and production of high-function, high-quality nanocomposite yarns. processing

It can be seen that the existing films are basically not used for the production of textile yarns and clothing fabrics. The key problem is that each part of the film material is relatively stable, and it is difficult to freely and efficiently transfer and Fully entangled, so direct twisting film material or twisting film material / conventional short fiber composite strands cannot achieve the effect of traditional filament and short fiber twisting into yarn cohesion, and the appearance and feel of the obtained yarn are comparable to those of conventional filament and short fibers. different fiber yarns

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