A kind of skin-core porous composite fiber and its preparation method

A composite fiber, sheath-core type technology, applied in fiber processing, filament/thread forming, conjugated synthetic polymer artificial filament, etc., can solve the problems of narrow application fields, poor mechanical properties of porous fibers, etc., and achieve low cost , simple process, excellent three-dimensional crimping performance

Active Publication Date: 2020-06-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of narrow application field due to the poor mechanical properties of porous fibers in the prior art, and to provide a skin-core porous composite fiber and its preparation method

Method used

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  • A kind of skin-core porous composite fiber and its preparation method
  • A kind of skin-core porous composite fiber and its preparation method
  • A kind of skin-core porous composite fiber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing a skin-core porous composite fiber, the main steps of which are as follows:

[0037] (1) Prepare core layer raw materials: put polypropylene and sodium chloride with a mass ratio of 99:1 into a banbury mixer or a twin-screw for melt blending, and mix evenly to obtain core layer raw materials;

[0038] (2) Preparing sheath-core composite fibers with holes and containing sodium chloride: put the cortex material polyethylene and the core material into the melt composite spinning machine, and obtain by spinning through the sheath-core spinneret after melting; The cross-section of sheath-core composite fiber with holes and containing sodium chloride is as follows: figure 1 As shown, the skin-core composite fiber has a skin-core structure, the skin layer 1 wraps the core layer 2, sodium chloride 3 is distributed in the core layer 2, the hole groove 4 is mainly located in the core layer 2, and the center 5 of the hole groove is a hollow circular shape ;...

Embodiment 2

[0043] A method for preparing a skin-core porous composite fiber, the main steps of which are as follows:

[0044] (1) Preparation of core layer raw materials: put polyester and potassium chloride with a mass ratio of 90:10 into a banbury mixer or a twin-screw for melt blending, and mix uniformly to obtain core layer raw materials;

[0045] (2) Preparation of skin-core composite fibers with holes and containing potassium chloride: Put the skin layer raw material polyphenylene sulfide and core layer raw materials into the melt composite spinning machine, and spin through the skin-core spinneret after melting Obtained; before spinning, each component of the skin layer and the core layer was vacuum-dried for 10 hours at a temperature of 160°C; during spinning, the mass ratio of the skin layer raw material to the core layer raw material was 7:3; the spinning process parameters were: The spinning temperature is 350°C, the spinning temperature fluctuation range is ±1°C, the spinning...

Embodiment 3

[0050] A method for preparing a skin-core porous composite fiber, the main steps of which are as follows:

[0051] (1) Preparation of core layer raw materials: putting polyacrylonitrile and ammonium chloride with a mass ratio of 70:30 into a banbury mixer or a twin-screw for melt blending, and mixing uniformly to obtain core layer raw materials;

[0052] (2) Preparing sheath-core composite fibers with holes and containing ammonium chloride: putting the cortex raw material polyester and the core layer raw materials into the melt composite spinning machine, and obtaining by spinning through the sheath-core spinneret after melting; Before spinning, each component of the cortex and core layer was vacuum-dried for 12 hours at a temperature of 180°C; during spinning, the mass ratio of the cortex layer raw material to the core layer raw material was 3:7; the spinning process parameters were: spinning The temperature is 280°C, the spinning temperature fluctuation range is ±1°C, the sp...

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Abstract

The invention relates to a skin-core-type porous composite fiber and a preparing method thereof. The preparing method comprises the step of soaking a skin-core-type composite fiber with a hole grooveand dissoluble inorganic particles in a solvent to prepare the skin-core-type porous composite fiber. The skin-core-type composite fiber with the hole groove and dissoluble inorganic particles is obtained by fusing a skin-layer raw material and a core-layer raw material and then conducting spinning through a skin-core-type spinneret plate, wherein the core-layer raw material contains the dissoluble inorganic particles, multiple intersectant spokes are arranged in spinneret holes, and mainly located in a core-layer through hole, and one of the spokes is connected to the inner wall of a skin-layer through hole; the solvent can only dissolve the inorganic particles in the skin-core-type composite fiber with the hole groove and dissoluble inorganic particles; the finally-prepared skin-core-type composite fiber is the skin-core-type porous composite fiber, the holes are distributed in the core layer, and the average diameter of the holes is 100-5,000 nm. The prepared skin-core-type porous composite fiber has the advantage of being high in specific surface area, and can be applied to the field of thermal insulation, sound insulation and the like.

Description

technical field [0001] The invention belongs to the technical field of composite fibers, and relates to a skin-core porous composite fiber and a preparation method thereof. Background technique [0002] At present, fibers are widely used in various fields such as textiles, medical care, safety protection, packaging, electronic appliances, and environmental protection. With the progress of society and the continuous improvement of people's living standards, people's demand for functional and differentiated fibers is increasing. come higher. [0003] Fiber materials are widely used, but the performance of fiber materials is affected by specific surface area, surface energy and surface activity at the same time, which greatly reduces the application effect. The excellent characteristics of high specific surface area and surface energy, low relative density, and low quality brought by the porous structure make porous fibers perform well in the fields of sound insulation, heat i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/06D01F11/06D01F8/14D01F8/16D01F11/08D01F8/08D01F8/12D01F8/10D01D5/34D01F11/04
CPCD01D5/34D01F8/06D01F8/08D01F8/10D01F8/12D01F8/14D01F8/16D01F11/04D01F11/06D01F11/08
Inventor 陈烨李明明王华平柯福佑王朝生徐静张玉梅李军令
Owner DONGHUA UNIV
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