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Negative poisson ratio yarn structure and manufacturing method thereof

A technology of negative Poisson's ratio and manufacturing method, which is applied in the directions of yarn, textiles and papermaking, can solve the problems of unstable twist of yarn structure, small effect of negative Poisson's ratio, uneven yarn surface, etc., and is easy to popularize and implement. , Simple operation, wide selection of effects

Inactive Publication Date: 2013-10-23
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that, in view of the negative Poisson's ratio effect of the negative Poisson's ratio yarn structure in the prior art, the yarn structure is unstable and the twist is uneven, and the yarn surface is uneven during stretching, Provide a negative Poisson's ratio yarn structure with significant negative Poisson's ratio effect, stable yarn structure, uniform twist, and smooth yarn surface when stretched, and a manufacturing method thereof

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 ratio yarn structure and manufacturing method thereof
  • Negative poisson ratio yarn structure and manufacturing method thereof
  • Negative poisson ratio yarn structure and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0048] Elastic yarns with a smaller tensile modulus and nylon filaments with a larger tensile modulus were selected as the second yarn and the first yarn respectively, wherein the diameter of the elastic yarn was 0.5mm, and the diameter of the nylon filament was 0.4mm. The two elastic yarns and nylon filaments are simultaneously fed from the bobbin 3 to the yarn forming area through the yarn tension device. Arranged alternately; by rotating the slotted turntable 4, the rubber band yarn and the nylon filament fed are twisted simultaneously, and it is then converged into a negative Poisson's ratio yarn structure at the entrance of the twisting and gathering device 5; through the roller device 6 and adding The twist accumulating device 5 pulls the twisted and formed negative Poisson's ratio yarn structure out of the yarn forming area and winds it onto the winding device 7 . In this embodiment, the twist of the final negative Poisson's ratio yarn structure is adjusted by adjusting...

Embodiment 2

[0051] An elastic thread with a small tensile modulus and a fishing line with a large tensile modulus are respectively selected as the second yarn and the first yarn, wherein the diameter of the elastic thread is 0.7mm, and the diameter of the fishing line is 0.5mm. The three elastic threads and fishing lines are simultaneously fed from the bobbin 3 to the yarn forming area through the yarn tension device. Arranged alternately; by rotating the slotted turntable 4, the fed elastic thread and fishing line are simultaneously twisted, which is then converged into a negative Poisson's ratio yarn structure at the entrance of the twisting and gathering device 5; through the roller device 6 and adding The twist accumulating device 5 pulls the twisted and formed negative Poisson's ratio yarn structure out of the yarn forming area and winds it onto the winding device 7 . In this embodiment, the twist of the final negative Poisson's ratio yarn structure is adjusted by adjusting the rotat...

Embodiment 3

[0054] Select glass fiber with less tensile modulus and carbon fiber with larger tensile modulus as the second yarn and the first yarn respectively, wherein the diameter of glass fiber is 0.2mm, and the diameter of carbon fiber is 0.1mm; The steps are the same as in Example 1, and will not be repeated here. The number of twists of the negative Poisson's ratio yarn prepared in Example 3 is 50 twists / meter.

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Abstract

The invention belongs to the technical field of weaving, and discloses a negative poisson ratio yarn structure and a manufacturing method thereof. The negative poisson ratio yarn structure is twisted by first yarns and second yarns, wherein the tensile modulus of each first yarn is greater than that of each second yarn. The manufacturing method of the structure comprises the following steps of: 1) yarn feeding: feeding the first yarns and the second yarns which are arrayed at intervals into a yarn forming area simultaneously, and 2) yarn twisting: twisting the fed first yarns and the second yarns simultaneously by rotating a slotted hole rotating disc, and then allowing the first yarns and the second yarns to be converged into the negative poisson ratio yarn structure at an inlet of a twisting aggregation device. The negative poisson ratio yarn structure is twisted by the two groups of yarns with different moduli, and is stable, and uniform in twist distribution, the yarns on the surface layer is free from slippage, and the surfaces of the yarns are level when tensioned. The manufacturing method is simple to operate, convenient to implement and low in used equipment cost, can be used for continuous production, and is convenient to popularize and implement.

Description

technical field [0001] The invention belongs to the technical field of textiles, and relates to a yarn structure and a manufacturing method thereof. More specifically, the present invention relates to a novel negative Poisson's ratio yarn structure and its manufacturing method. Background technique [0002] The solid materials commonly seen in daily life are all positive Poisson's ratio materials. When such materials are stretched (or compressed) in a certain direction, they will shrink (or expand) and deform perpendicular to the direction of the force. Negative Poisson's ratio materials are just the opposite. When they are stretched (or compressed) in a certain direction, they will expand (or shrink) perpendicular to the direction of the force. Therefore, negative Poisson's ratio materials are also called auxetic materials. The abnormal mechanical properties exhibited by them have not only attracted great attention from researchers in the field of materials science and mec...

Claims

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Application Information

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IPC IPC(8): D02G3/38D02G3/26D02G3/04D01H7/02D01H13/02
Inventor 胡红刘世瑞
Owner THE HONG KONG POLYTECHNIC UNIV
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