Pre-wrapping-pipe-front-mounted composite negative-poisson's-ratio-yarn spinning device and method and application

Abstract

The invention provides a pre-wrapping-pipe-front-mounted composite negative-poisson's-ratio-yarn spinning device. The device comprises a pre-wrapping pipe for allowing a rigid filament to be in set feeding angle positioning, a yarn feeding device for stable overfeeding of the rigid filament and a buncher for accurate positioning and bundling of a short fiber strand, wherein stable wrapping is formed between the pre-wrapping pipe and the short fiber strand with the twisting degree. The pre-wrapping pipe and the yarn feeding device are installed on the output side of a front roller nip on a ring spinning frame, and the buncher is installed on the input side of the front roller nip on the ring spinning frame. The invention also provides a composite pre-wrapping-pipe negative-poisson's-ratio-yarn spinning method and application of the composite spinning device. The short fiber strand is output from the front roller nip to be twisted to be a high-twisting fiber strand; the rigid filament is fed through the yarn feeding device, and is wrapped through the pre-wrapping pipe and the high-twisting fiber strand in certain tension, and the negative poisson's ratio yarn is formed in the mode that the rigid filament is slightly embedded into the high-twisting fiber strand. The structure of the device is simple, the cost is low, operation is convenient, and the negative poisson's ratio yarn prepared with the method has the more obvious negative poisson ' s 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] Since the emergence of composite spinning in the late 1950s, it has provided more space and more choices for the improvement and functionalization of yarn structure and performance. But basically it is still limited to the material content of the multi-axis system and the efforts made on different spinning machines. Such as 2-axis to multi-axis in terms of material content to increase components, staple fiber / short fiber (S / S) composite spinning, staple fiber / filament (S / F) or filament / short fiber (F / S) composite Spinning to solve the requirements of spinnability, high efficiency, low cost and functionalization. Such as ring composite spinning, rotor composite spinning, hollow spindle wrapping and wr...

AI Technical Summary

Problems solved by technology

[0018] 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 the preparation in the combination, it is more practical to use the composite structure yarn of short-fiber strands / filaments, 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 forming of negative Poisson's ratio yarn is only a general intermittent production of filament / filament composite. Can high modulus filaments be synchronized with high twist and high twist on traditional spinning machines? One-step composite spinning of elastic staple fiber strands is the key technology for forming negative Poisson's ratio long / short composite yarns

Images