Characteristics of double-core spun yarn
Release time:
2025-02-26
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Abstract
A double-core spun yarn is a type of yarn produced by twisting together short fibers as the outer covering material and two filaments with different properties as the core filaments. Due to the contrasting properties of the two core filaments, they complement each other effectively, endowing the yarn with superior characteristics. For example, a cotton-covered T400 plus spandex yarn—T400 boasts excellent bulkiness, outstanding elastic recovery, better dimensional stability than spandex, and higher strength. Spandex, on the other hand, is characterized by its high elasticity and ability to withstand repeated stretching. When these two filaments are used as core filaments and cotton fibers as the outer covering, the resulting yarn not only retains the excellent moisture absorption, softness, and elasticity of conventional cotton-spandex yarns but also exhibits enhanced strength, abrasion resistance, and dimensional stability. Fabrics made from this yarn offer a comfortable wearing experience, free from any feeling of tightness, pressure, or looseness. Moreover, they feature excellent abrasion resistance, high tear strength, minimal shrinkage, and excellent shape retention.
Key to Double-Core Yarn Production
Double-core yarn is produced by feeding two types of filament fibers into the nip between the front roller and the rubber-covered roller of a spinning machine via guide rollers, where they are wrapped and twisted together by short fibers. Different filament fibers require different levels of pre-drawing tension to bring out their respective characteristics. One of the key factors in production is precisely controlling the tension and stability of the filament fibers, ensuring consistent tension within each spindle as well as uniform tension among spindles. Fluctuations in filament fiber tension can directly affect variations in fabric width. Currently, the control of pre-drawing tension for spandex filaments has reached a mature stage; however, tension control for the other filament fiber remains under active exploration. At present, the actively fed filament fiber device is widely recognized as an effective approach.
Long-term commitment to the development and production of a series of core-spun yarn devices, spandex core-spun yarn devices, filament core-spun yarn devices, double core-spun yarn devices and other products can be used on long and short spinning machines of different manufacturers. According to the classification of guide roller materials and processing technology, users can be provided with core-spun yarn devices with high, medium and low prices.
Double-core core-spun yarn is a composite yarn spun from two filaments as the core yarn and coated with one or more short fibers (such as cotton, hemp, wool, silk, polyester, viscose, etc.). Usually, elastic filaments and rigid filaments are used as the core yarn. The composite yarn not only gives full play to the high elastic characteristics of elastic filaments, but also has the tensile and wear resistance characteristics of rigid filaments, and maintains the surface characteristics of coated short fibers, it is one of the ideal yarns for popular stretch fabrics in China at present. The other is double-filament core-wrapped yarn, which is a core-wrapped yarn with two rigid filaments wrapped in the center of the yarn and one wrapped around the outside of the yarn. The composite yarn realizes that the two filaments have different positions and shapes in the yarn. One filament is wrapped in the middle of the staple fiber to form a core-wrapped structure, which can be less exposed to sunlight, to prevent the strength from decreasing, another filament and the yarn of the core-wrapped structure are wrapped together to form a wrapping structure, which provides good abrasion resistance for the yarn. The composite yarn is the best choice for the production of training clothing and gun clothing.
Jinzhong Jingwei Tianying Machinery Co., Ltd. has more than 20 engineering and management personnel, with all kinds of advanced production equipment, design and manufacturing and other advanced technological means, around the special parts and auxiliary devices of textile machinery, the enterprise has established a development mode relying on the main machine of warp and weft spinning machine, independent research and development and independent production. The double-core spun yarn device designed and manufactured by our company makes full use of the original space of the main machine. On the basis of the original spinning principle, the new spinning device is installed, which broadens the spinning range of the spinning machine. The device has excellent yarn forming index, makes up for the defects of the traditional double-core spun yarn device, and makes the yarn more texture and aesthetic.
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