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Elastic sheath-core fiber and preparation method thereof

A technology of elastic leather and fiber, which is applied in fiber processing, textiles, papermaking, yarn, etc., can solve the problems of single structure, limit the practical application of stretchable conductive fibers, poor performance stability, etc., and achieve improved roughness and regular spiral structure High degree and controllability, the effect of increasing richness

Active Publication Date: 2021-12-03
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are disadvantages such as complex process, poor performance stability, single structure, and thick fibers, which limit the practical application of stretchable conductive fibers

Method used

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  • Elastic sheath-core fiber and preparation method thereof
  • Elastic sheath-core fiber and preparation method thereof
  • Elastic sheath-core fiber and preparation method thereof

Examples

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Effect test

preparation example Construction

[0056] The preparation method of elastic sheath-core fiber provided by the invention comprises the following steps:

[0057] S1. Pre-drawing the core filament 1 according to the preset drawing ratio;

[0058] S2. Prepare cortex solution 11;

[0059] S3. Coating the skin layer solution 11 on the surface of the pre-stretched core filament 1 to form a film through the microfluidic coating coating technology in solid-liquid form, and then release the pre-stretch of the core filament 1 stress, to obtain elastic sheath-core fibers.

[0060] By adopting the above technical scheme, the present invention uses a polymer with certain film-forming properties as the skin layer material, and pre-stretched elastic filaments as the core layer material, controls the spinning process, and prepares a kind of elastic fiber that is different from the conventional single linear elastic fiber. The different novel three-dimensional helical elastic skin-core composite fibers13. The elastic sheath-c...

Embodiment 1

[0082] A preparation method of elastic sheath-core fiber, comprising the following steps:

[0083] (1) Prepare the cortex solution: configure ethyl acetate and toluene into a mixed solvent with a mixing ratio of 3:1, and set aside. Weigh an appropriate amount of SBS masterbatch and slowly add it to the mixed solvent, stir magnetically at room temperature for 12 hours until the SBS particles are completely dissolved, and prepare a 15% SBS solution with a clear and transparent texture.

[0084] (2) The core material is 140D PU filament, and the pre-drawing is 300%.

[0085] (3) Utilize microfluidic coating technology, through microfluidic chip channel design, use SBS solution as the skin layer, wrap on the surface of the pre-drawn core layer PU filament, at the chip outlet, wrap on the surface of the PU filament The SBS solution quickly solidified into a film, and then the pre-drawing stress was released, and the PU fiber retracted naturally, and the SBS / PU skin-core composite ...

Embodiment 2

[0096] A preparation method of an elastic sheath-core fiber. Compared with the examples, the difference lies in that the mass fraction of SBS is 25%, and the pre-drawing of PU is 200%. Others are substantially the same as in Embodiment 1, and will not be repeated here.

[0097] see Figure 11 As shown, it can be seen that the SBS 25 / PU 200 Micropores were hardly observed on the surface of the composite elastic fiber. This may be due to the decrease of the solvent content in the SBS solution of the cortex, the volume of the solvent-rich phase decreased relative to the total volume, and finally a small amount of micropores were formed on the fiber surface.

[0098] Although the energy loss of the composite elastic fiber prepared under this condition is small, the residual strain is relatively large.

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Abstract

The invention provides an elastic sheath-core fiber and a preparation method thereof. According to the preparation method, filaments in the pre-stretched state are subjected to sheath layer wrapping, after stress is released, a special three-dimensional spiral structure can be formed, and the tensile property of the fiber is remarkably improved. Especially, the filaments with the cross section of an asymmetric structure and elastic film forming matter are adopted for wrapping, rough wrinkles and a porous structure can be formed on the surface of the sheath layer, and the roughness of the surface appearance is improved. Furthermore, a conductive functional layer and the like are prepared on the surface of the fiber, the adhesion fastness of the functional layer is higher, the tensile conductivity of the fiber is also remarkably improved, and the fiber can be well applied to wearable electronic equipment.

Description

technical field [0001] The invention relates to the technical field of composite fiber preparation, in particular to an elastic sheath-core fiber and a preparation method thereof. Background technique [0002] With the development of science and technology society, wearable flexible electronic devices have gradually entered people's lives, and have become an indispensable part of human life and technological development. When conventional conductive fibers are used in practice, the amount of deformation is usually limited by the material or structure, which makes the product poor in ductility and flexibility, and cannot meet the needs of large deformation applications. Especially when the deformation is large, the conductive path in the conductive fiber will be destroyed, causing the device to fail or even be destroyed. [0003] As an ideal material for the preparation of wearable and flexible electronic devices, flexible and stretchable conductive fibers can meet various d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02G3/32D02G3/04D01D5/253
CPCD02G3/32D02G3/045D01D5/253
Inventor 韦炜王栋汤清伦严坤李沐芳
Owner WUHAN TEXTILE UNIV
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