Composite yarn with reverse double-layer wrap structure and negative Poisson's ratio, four-passage hollow spindle spinning apparatus thereof, and control method of four-passage hollow spindle spinning apparatus

A negative Poisson's ratio, hollow spindle technology, applied in the field of spinning, can solve problems such as inability to spin yarn, and achieve the effect of achieving designability and ensuring effectiveness

Pending Publication Date: 2019-07-26
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In the process of preparing negative Poisson's ratio composite materials, according to different structural and functional requirements, the negative

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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  • Composite yarn with reverse double-layer wrap structure and negative Poisson's ratio, four-passage hollow spindle spinning apparatus thereof, and control method of four-passage hollow spindle spinning apparatus
  • Composite yarn with reverse double-layer wrap structure and negative Poisson's ratio, four-passage hollow spindle spinning apparatus thereof, and control method of four-passage hollow spindle spinning apparatus
  • Composite yarn with reverse double-layer wrap structure and negative Poisson's ratio, four-passage hollow spindle spinning apparatus thereof, and control method of four-passage hollow spindle spinning apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1, two bundles of high-performance filament fibers are selected as the wrapping filament 1 and the wrapping filament 2 in the wrapping component of the double-wrapped composite yarn, and the total proportion of the two is less than 25%; the flexible carbon fiber staple fibers are selected The strip component is used as the core component of the double-wrapping composite yarn and accounts for more than 75%.

[0063] Under low tension conditions, the carbon fiber staple fiber components are linear and constitute the core yarn of the composite yarn. A bundle of filament fiber components is used as the first layer of wrapping yarn to wrap the core yarn in a helical shape. In the first layer of wrapping, another bundle of filament fiber components is used as the second layer of wrapping yarn, and the combined structure of the core yarn and the first layer of wrapping yarn is wrapped in a spiral shape for the second layer, and the first layer of wrapping The windin...

Embodiment 2

[0066] In the second embodiment, the negative Poisson's ratio of the composite yarn is due to the change of the transverse dimension of the yarn due to the phase transition of the yarn structure. Let the diameter of the core yarn be D, and the diameter of the wrapping yarn 1 be d 1 , the diameter of wrapping yarn 2 is d 2 , take d=(d 1 +d 2 ) / 2. The apparent diameter of the composite yarn under low tension conditions is: (2*d+D), and the apparent diameter of the composite yarn under high tension conditions is: (2*D+d). Then the composite yarn diameter change rate ε=-(D-d) / (D+2d). In general, the negative Poisson's ratio coefficient of the yarn is positively correlated with the diameter change rate ε. If increase the difference value (D-d) of core component and wrapping component diameter, then negative Poisson's ratio coefficient is big, if reduce the difference value (D-d) of the first component yarn and the second component yarn diameter, Then the negative Poisson's ra...

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Abstract

The invention relates to a composite yarn with reverse double-layer wrap structure and negative Poisson's ratio, a four-passage hollow spindle spinning apparatus thereof, and a control method of the four-passage hollow spindle spinning apparatus. A flexible fluffy staple-fiber strand is reversely wrapped with two high-modulus low-elongation filament fibers to form a composite yarn self-lock structure; upon low tension, the staple-fiber strand is nearly not restrained by the reversely-wrapped filament fibers and therefore is linear; upon high tension, the staple-fiber strand is bent into a spiral yarn under compression of the reversely-wrapped filament fibers; the structural phase can be changed quickly; particularly when high and low tensile stresses alternate frequently, the composite yarn with reversely-wrapped structure can better adapt to the reversible change of the structural phase, so that effectiveness of the negative Poisson's ratio effect of the composite yarn is guaranteed;in addition, linear density of a staple-fiber core is adjusted through an asynchronous drafting mechanism servo-driven by a PLC (programmable logic controller), the negative Poisson's ratio coefficient of the composite yarn is segmentally changed according to a preset law, and therefore, designability of the yarn structure and distribution controllability for the negative Poisson's ratio coefficient of the composite yarn can be achieved.

Description

technical field [0001] The invention relates to a negative Poisson's ratio composite yarn with a reverse double-layer wrapping structure, a four-channel hollow spindle spinning device and a control method thereof, and belongs to the technical field of spinning. Background technique [0002] Negative Poisson's ratio yarn is a composite yarn with special mechanical properties. The apparent diameter of the yarn will become thicker when it is stretched in the axial direction, resulting in radial expansion deformation. Negative Poisson's ratio yarn is usually composed of two components. The first component is usually made of high modulus and low elongation fiber materials, such as carbon fiber, glass fiber, Kevlar, aramid fiber, etc.; the second component is Fiber materials with low modulus and high elongation, such as silicone rubber, natural rubber or spandex filament. The two-component composite yarn with a double helix structure is spun from these two materials. Under low te...

Claims

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Application Information

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IPC IPC(8): D02G3/04D02G3/38
CPCD02G3/04D02G3/385D10B2101/12
Inventor 薛元朱道武彭旭光舒少阳杨友奎王桀播俞权慧张银俐
Owner JIANGNAN UNIV
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