Characteristics of double-core wrapped yarn
Release time:
2025-02-26
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Abstract
Double-core wrapped yarn is made from short fibers as the outer wrapping material, and two different types of long fibers as the core yarn, twisted and spun into yarn. Due to the different properties of the two core yarns, a strong complementarity is created, giving the yarn superior characteristics. For example, cotton-wrapped T400 + spandex. The characteristics of T400 are: good bulkiness, excellent elastic recovery, better dimensional stability than spandex, and higher strength. The characteristics of spandex are high elasticity and the ability to withstand repeated stretching. Using these two long fibers as core yarns, the yarn produced with cotton fibers not only maintains the good moisture absorption, softness, and elasticity of cotton-spandex yarn but also has higher strength, abrasion resistance, and dimensional stability. Fabrics made from this yarn provide a feeling of no restriction, no pressure, and no looseness when worn. Additionally, they are abrasion-resistant, have high tear strength, low shrinkage, and good shape retention.
Key to double-core yarn production
Double-core yarn is produced by introducing two types of long fibers into the front roller of the fine spinning machine through a guide wheel, where they are wrapped and twisted by short fibers. Different long fibers require different pre-stretching tensions to exhibit their respective characteristics. One of the keys to production is to control the tension and stability of the long fibers. It is essential to ensure that the tension is consistent within the same spindle and between spindles. Fluctuations in long fiber tension will directly affect the width variation of the fabric. Currently, the control of pre-stretching tension for spandex yarn is mature, but the tension control for the other long fiber is still being explored. The actively fed long fiber device is currently more widely recognized.
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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