A kind of preparation method of nanofiber non-woven fabric

A nanofiber and nanofiber web technology, applied in the directions of melt spinning, fiber processing, non-woven fabrics, etc., can solve the problem of difficulty in controlling two groups of polymers to be stretched into filaments alone, the decrease of nanofiber strength, and the breakage of nanofiber filaments. and other problems, to achieve the effect of strong cohesion, improved fiber stability, and high diameter uniformity.

Active Publication Date: 2020-09-01
WUHAN TEXTILE UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method uses solution electrospinning, which has the problems of difficult solvent selection, environmental pollution, and high cost. Moreover, it is difficult to control two groups of polymers to be stretched into filaments separately by solution method, which may lead to a single nanofiber precursor containing two Polymer, after dissolving and removing one of the phases, the nanofiber protofilaments break, resulting in a decrease in the strength of the nanofibers

Method used

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  • A kind of preparation method of nanofiber non-woven fabric
  • A kind of preparation method of nanofiber non-woven fabric
  • A kind of preparation method of nanofiber non-woven fabric

Examples

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Effect test

Embodiment 1

[0035] A kind of preparation method of nanofiber nonwoven fabric, it is characterized in that comprising the following steps:

[0036] S1. Melt and blend polypropylene (PP) and cellulose acetate butyrate (CAB) in a twin-screw extruder at a mass ratio of 1:9. The parameters of each zone of the twin-screw extruder are preferably set as follows: temperature in zone one: 130°C; Zone 2 temperature: 190°C; Zone 3 temperature: 210°C; Zone 4 temperature: 220°C; Zone 5 temperature: 230°C;

[0037] S2. Filter the melted fluid into the spinning box, and extrude it into filaments through the spinneret;

[0038]S3. Using high-temperature and high-pressure airflow meltblown with a temperature of 260-280°C and a pressure of 0.15-0.25MPa, the melt is stretched into ultra-fine fibers under the action of high-speed hot airflow, and solidified by heat exchange with the surrounding cold air Form composite fiber filaments, use a web forming machine to collect and form a composite fiber web, and c...

Embodiment 2

[0042] Embodiment 2 provides a kind of preparation method of nanofiber nonwoven fabric, comprises the following steps:

[0043] S1. Melt and blend polypropylene (PP) and cellulose acetate butyrate (CAB) in a twin-screw extruder at a mass ratio of 1:9. The parameters of each zone of the twin-screw extruder are preferably set as follows: temperature in zone one: 130°C; Zone 2 temperature: 190°C; Zone 3 temperature: 210°C; Zone 4 temperature: 220°C; Zone 5 temperature: 230°C;

[0044] S2. Filter the melted fluid into the spinning box, and extrude it into filaments through the spinneret;

[0045] S3. Using high-temperature and high-pressure airflow meltblown with a temperature of 260-280°C and a pressure of 0.15-0.25MPa, the melt is stretched into ultra-fine fibers under the action of high-speed hot airflow, and solidified by heat exchange with the surrounding cold air Form composite fiber filaments, use a web forming machine to collect and form a composite fiber web, and control...

Embodiment 3～8

[0050] Compared with Example 1, Examples 3-8 differ in that the preparation conditions of the polypropylene nanofiber nonwoven fabric are shown in Table 1, and the others are the same as Example 1.

[0051] Table 1 embodiment 3~8 nanofiber nonwoven fabric preparation conditions

[0052]

[0053]

[0054] Embodiment 1~8 prepares polypropylene nanofiber nonwoven fiber average diameter and nonwoven thickness as shown in table 2, as can be seen, with polypropylene (PP) and cellulose acetate butyrate (CAB) mass ratio The average diameter of polypropylene nanofibers and the thickness of single-layer non-woven fabrics gradually increased, indicating that increasing the CAB content appropriately would help reduce the diameter of nanofibers. This is because when the CAB content increases, the CAB in the spinning fine stream will more effectively prevent the PP melt phase from becoming larger, and the PP phase will be stretched and refined with a smaller particle size under the ac...

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Abstract

The invention discloses a preparation method of a nanofiber non-woven fabric. A thermoplastic polymer and a substrate which have thermodynamic incompatibility performance are subjected to melt blending according to a certain mass ratio, through melt extrusion and melt blowing, composite fibers are obtained, and the single-layer composite fibers are deposited on a receiving device; under the adhesion effect of the composite fibers, a single-layer composite fiber web is obtained; the substrate in the composite fiber web is dissolved and removed by adopting a solvent, a nanofiber web with a thermoplastic polymer phase is obtained, then the same method is adopted for collecting the second polymer nanofiber web layer, the third polymer nanofiber web layer,..., and the n polymer nanofiber web layer on a single-layer nanofiber non-woven fabric in sequence, and finally, the nanofiber non-woven fabric is obtained through hot rolling reinforcement treatment. By means of the preparation method, the nanofiber non-woven fabric with the nanofiber diameter smaller than 200 nanometers and the thickness of 0.2-5 microns can be prepared, and the preparation method of the nanofiber non-woven fabric has the advantages that the fiber diameter uniformity and strength are high, the preparation method is simple, the cost is low, and large-scale preparation can be achieved.

Description

technical field [0001] The invention belongs to the technical field of textile material preparation, and in particular relates to a preparation method of nanofiber nonwoven fabric. Background technique [0002] In the development of fiber science and engineering, fiber ultra-fine is an important direction. Nanofiber refers to a linear material with a diameter of nanoscale and a large length with a certain aspect ratio, which has a very significant size effect. , heat, magnetism, electricity and other aspects show many novel properties, and then endow the woven or non-woven fabrics made of nanofibers with special properties, which have shown huge applications in the fields of clothing, food, medicine, energy, electronics and aviation. value. However, nanofibers are generally referred to as nanofibers in a broad sense, that is, fibers with a diameter of less than 1 μm, and it is still difficult to prepare fibers with a diameter of less than 200 nm on a large scale. At presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/147D04H3/16D01D1/04D01D5/098D01F11/06D01F11/08
CPCD01D1/04D01D5/0985D01F11/06D01F11/08D04H3/147D04H3/16
Inventor 郭启浩刘轲王栋王旭赵青华
Owner WUHAN TEXTILE UNIV
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