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Negative Poisson's ratio yarn composite spinning device, method and application of pre-wrapped tube

A technology of negative Poisson's ratio and composite spinning, which is applied in spinning machine, yarn, textile and papermaking, etc., can solve the problem that it is difficult to obtain a higher negative Poisson's ratio, and achieve obvious negative Poisson's ratio effect, Easy to install effect

Active Publication Date: 2019-09-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Negative Poisson's ratio yarn composite spinning device, method and application of pre-wrapped tube
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  • Negative Poisson's ratio yarn composite spinning device, method and application of pre-wrapped tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: Spinning of Nomex Staple / Kevlar Filament Composite Negative Poisson's Ratio Composite Yarn

[0062] Using the pre-wrapped tube composite spinning device of the present invention, the Kevlar filament bundles are fed into the holding roller pair of the overfeeding mechanism 2 in the above-mentioned manner, and then overfeed into the pre-wrapped tube 1, out of the pre-wrapped tube and out The yarn mouth 12 is axially converged with the Nomex sliver to be twisted to form a yarn. The specific process parameters and the measured data of the yarn are shown in the table. The physical and mechanical properties of the spun Nomex staple / Kevlar filament negative Poisson's ratio composite yarn are as follows. Among them, when the Nomex staple fiber / Kevlar filament composite yarn is stretched, the Nomex staple fiber strands change from straightening to spiral wrapping; Kevlar filament bundles change from spiral wrapping to straightening core yarn, that is, the composite ya...

Embodiment 2

[0063] Example 2: Negative Poisson's Ratio Composite Yarn of Polyester Cotton Staple Fiber + Elastane Yarn / High Strength Polyester Filament Filament

[0064] Using the pre-wrapped tube composite spinning device and process of the present invention, the elastic yarn (spandex) is fed into the holding roller pair of the overfeeding mechanism 2 in the above-mentioned manner, and then overfeeds into the pre-wrapped tube 1, and the pre-wrapped tube 1 is fed out. The yarn outlet 12 of the winding tube is axially converged with the spun polyester-cotton staple fiber sliver and twisted to form a yarn. The specific process parameters and the measured data of the yarn are shown in the table. The physical and mechanical properties of the spun (polyester-cotton staple fiber + elastic yarn) / high-strength polyester filament negative Poisson's ratio composite yarn are as follows. Among them, when the elastic core-spun yarn of polyester-cotton staple fiber and spandex yarn / high-strength polyes...

Embodiment 3

[0065] Example 3: Spinning of basalt staple fiber yarn / carbon fiber filament composite negative Poisson's ratio composite yarn

[0066] Using the above-mentioned overfeed asymmetric two-axis composite spinning device of the present invention, the carbon fiber filament bundle is fed into the holding roller pair of the overfeed mechanism 2 according to the above method, and then the overfeed enters the pre-wrap tube 1, and the pre-wrap is discharged. The yarn outlet 12 of the winding tube is axially converged with the spun basalt short fiber whiskers and twisted to form a yarn. The specific process parameters and the measured data of the yarn are shown in the table. The physical and mechanical properties of the spun basalt staple fiber / carbon fiber filament negative Poisson's ratio composite yarn are as follows. Among them, when the basalt staple fiber / carbon fiber filament composite yarn is stretched, the basalt staple fiber strands change from straight to spiral wrapping; the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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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 that can be deformed with negative Poisson's ratio and a composite spinning technology, and 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 options for yarn structure, performance improvement and functionalization. However, efforts are basically limited to the material content of the multiaxial system and different spinning machines. Such as 2-axis to multi-axis in substance content to increase the composition, short fiber / short fiber (S / S) composite spinning, short fiber / filament (S / F) or filament / short fiber (F / S) composite spinning to address the requirements of spinnability, high efficiency, low cost and functionalization. Such as ring composite spinning, rotor composite spinning, hollow spindle wrapping and wrapping composite spinning on ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02G3/38D01H13/04D01H5/72
Inventor 于伟东杜赵群周铭高倩刘赛
Owner DONGHUA UNIV
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