A three-axis cone type composite spinning device and method for negative Poisson's ratio yarn

Abstract

The invention provides a three-axis system cone cylinder type composite spinning device of negative poisson ratio yarn. The three-axis system cone cylinder type composite spinning device comprises a ring spinning frame, and the rear side of a front roller of the ring spinning frame is provided with a bundler and an under-feeding elasticity enhancing device, wherein the bundler is used for positioning and bundling short fiber strands, and the under-feeding elasticity enhancing device is used for controlling the pre-tension and position of stretch yarn, feeding the stretch yarn into the bundler and making the stretch yarn and the short fiber strands wrapped to form stretch yarn with a rebounding function; a flattening plate used for unfolding rigid filament tows is and a cone cylinder are arranged on the front side of the front roller of the ring spinning frame, wherein the cone cylinder is used for continuously unfolding the rigid filament tows and feeding the wrapped rigid filament tows at a set wrapping angle, so that the stretch yarn is wrapped with the rigid filament tows to form a cone cylinder of the negative poisson ratio yarn; an overfeeding device used for enabling the rigid filament tows to generate the required overfeeding amount due to a yarn forming spiral track is arranged on the upstream of the flattening plate. The composite spinning device is simple in structure and convenient to operate, and the obtained negative poisson ratio yarn can be used for a fabric with a negative poisson ratio and has a more obvious negative poisson ratio effect.

Description

technical field [0001] The invention relates to a composite yarn capable of negative Poisson's ratio deformation and its composite spinning technology, which is an abnormal negative Poisson's ratio textile and a new technology for its preparation. Background technique [0002] Negative Poisson’s ratio yarn refers to a yarn whose apparent diameter will become thicker due to stretching when the yarn is stretched axially. [0003] Similar to the US patent (P Hook, Uses of auxetic fibers, patent number: US8002879 B2, 2011), the main content is the physical characteristic index of the negative Poisson's ratio fiber aggregate and various uses of the negative Poisson's ratio fiber aggregate. Such negative Poisson's ratio fibers can be used in: interconnected collections of negative Poisson's ratio fibers, which can be in the form of parallel arrays of fiber assemblies, woven fabrics, knitted fabrics, nonwovens, felts, or multiples of these fabrics. laminated body. Its defined com...

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Problems solved by technology

[0016] To sum up, the patents given above and the existing research have the following two problems that have not been addressed or resolved: first, whether the negative Poisson’s ratio yarn can break through only the simplest elastic filament / filament Due to the limitation of preparation in the combination, it is more practical to use short-fiber strands / filament composite structure yarns, because short-fiber yarns are usually softer and more easily deformed, and it is difficult not to obtain a higher negative Poisson's ratio, or even a negative Poisson's ratio; secondly, the formation of negative Poisson's ratio yarn is only a general intermittent production of filament / filament complex, whether high modulus filament synchronization and high twist, One-step composite spinning of staple fiber yarn with high elasticity is the key technology for forming negative Poisson's ratio long / short composite yarn

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