Preparation method of black cotton-like fiber

Abstract

The invention relates to a preparation method of black cotton-like fibers, which adopts a DTY (Draw Textured Yarn) elasticizing process. Dacron POY and FDY fibers containing carbon black sequentially pass through a first yarn guide, a yarn guide roller, a tensioner, a first yarn feeding roller, a pre-interlacing device, a second yarn feeding roller, a first deformation hot box, a cooling plate, a false twister, a third yarn feeding roller, a middle interlacing device, a shaping hot box and a shaping yarn feeding roller, oil applying and winding forming are conducted, and the black imitation cotton fibers are obtained. The first yarn guide is a yarn guide wheel; the tows make contact with the groove bottom of the first yarn guide in the moving process, and the first yarn guide is driven to rotate; the tensioner is a magnetic tensioner; the tows make contact with the groove bottom of a godet wheel of the tensioner in the moving process, and the inferior angle formed by the tows before and after making contact with the groove bottom ranges from 140 degrees to 160 degrees; the set tension of the tensioner is 7-10 cN; and the linear velocity ratio of the first yarn feeding roller to the second yarn feeding roller is 1.03-1.04. Abrasion of the first yarn guide device can be reduced, the tow interlacing degree is improved, and no net is scattered.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers and relates to a method for preparing black cotton-like fibers. Background technique [0002] Polyester is polyethylene terephthalate (PET) produced by polycondensation of terephthalic acid (PTA) and ethylene glycol (EG). Polyester is the largest category of synthetic fibers, and its output ranks first among all chemical fibers. At present, the main varieties in the market are pre-oriented yarn POY, fully drawn yarn FDY, stretched textured yarn DTY, etc. [0003] Polyester pre-oriented yarn, also known as polyester partially oriented yarn, is the as-spun yarn (that is, winding yarn) obtained by high-speed spinning (spinning speed 3000-3600m / min). Compared with general stretched yarn, its degree of orientation is low and crystallinity is low; compared with undrawn yarn (UDY) obtained by conventional spinning, its degree of orientation is high. In the early 1970s, due to the industrial p...

AI Technical Summary

Problems solved by technology

[0005] At present, carbon black is usually used as the masterbatch to color polyester filaments, but inorganic additives such as carbon black will cause the raw material tow to be rough, and will wear out the existing first yarn guide in a short time. Reduced lifespan of the yarn guides and wear between the tow and yarn guides can also negatively impact tow performance

[0006] Because the first yarn guide is worn out of the groove, the surface of the groove is relatively rough, which will generate a large resistance pulling force on the tow, so that the tow will generate a high friction between the first yarn guide and the first wire feeding roller. Tension, the tension will be transmitted to the first feeding roller and the second feeding roller to pull the tow, resulting in excessive tension of the tow, making it impossible for the network nozzle to secure the tow network, resulting in off-network and product quality problems. make the product unmanufacturable

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