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Porous fiber non-woven fabric

A technology of porous fibers and non-woven fabrics, applied in the field of textiles, can solve problems such as the inability to meet high-precision and high-performance filtration requirements, the inability to meet the production conditions of nanofibers, and the decline in fiber mechanical properties, so as to reduce the diameter of melt-blown fibers, melt The effect of reducing bulk viscosity and improving mechanical properties

Inactive Publication Date: 2021-08-31
张琦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in the existing melt-blown technology
[0003] Existing melt-blown non-woven products still cannot meet the high-precision and high-performance filtration requirements, such as anti-smog masks, car / tank engine dust-proof, etc. If you want to further improve the use effect or performance of its products, you need to increase its specific surface area. This can be achieved by reducing the fiber diameter to the nanoscale and introducing a porous structure
Nonwoven Technologies Company has prepared polypropylene fibers with a fiber diameter of about 500nm by using a spinning hole with a diameter of 63.5μm, but this method has a low yield, and the spinneret is extremely expensive, and it is easy to crack and plug, and the production cost is too high. high
At present, domestic meltblown equipment and polypropylene raw materials cannot meet the production conditions of nanofibers
The introduction of the porous structure can be achieved by adding incompatible inorganic nanoparticles or polymers to the melt-blown polymer masterbatch, and then selectively removing the pores by solvent dissolution or calcination, but this method will lead to a significant increase in the mechanical properties of the fibers. Decline and there is a problem of incomplete dissolution

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A porous fiber non-woven fabric, in parts by weight, mainly comprises: 50 parts of polypropylene, 30 parts of diluent and 20 parts of modified sodium alginate.

[0039] A preparation method of a porous fiber non-woven fabric, the preparation method of the porous fiber non-woven fabric mainly comprises the following preparation steps:

[0040] (1) Mix sodium alginate and water in a three-necked flask in a mass ratio of 1:8, and add vinyl acetate with a mass of 0.6 times the mass of sodium alginate and sodium persulfate with a mass of 0.1 times the mass of sodium alginate into the three-necked flask. Nitrogen was introduced into the three-necked flask at a rate of 50 mL / min, and the reaction was stirred for 5 hours at a temperature of 70 °C, and then freeze-dried to obtain a modified sodium alginate blank. The nano-calcium carbonate and water were mixed at a mass ratio of 1:50. In a beaker, add sodium dodecyl benzene sulfonate with 1 times the mass of nano-calcium carbona...

Embodiment 2

[0050] A porous fiber non-woven fabric, in parts by weight, mainly comprises: 50 parts of polypropylene and 20 parts of modified sodium alginate.

[0051] A preparation method of a porous fiber non-woven fabric, the preparation method of the porous fiber non-woven fabric mainly comprises the following preparation steps:

[0052] (1) Mix sodium alginate and water in a three-necked flask in a mass ratio of 1:8, and add vinyl acetate with a mass of 0.6 times the mass of sodium alginate and sodium persulfate with a mass of 0.1 times the mass of sodium alginate into the three-necked flask. Nitrogen was introduced into the three-necked flask at a rate of 50 mL / min, and the reaction was stirred for 5 hours at a temperature of 70 °C, and then freeze-dried to obtain a modified sodium alginate blank. The nano-calcium carbonate and water were mixed at a mass ratio of 1:50. In a beaker, add sodium dodecyl benzene sulfonate with 1 times the mass of nano-calcium carbonate to the beaker, and...

Embodiment 3

[0061] A porous fiber non-woven fabric, in parts by weight, mainly comprises: 50 parts of polypropylene, 30 parts of diluent and 20 parts of modified sodium alginate.

[0062] A preparation method of a porous fiber non-woven fabric, the preparation method of the porous fiber non-woven fabric mainly comprises the following preparation steps:

[0063] (1) Mix sodium alginate and water in a three-necked flask in a mass ratio of 1:8, and add vinyl acetate with a mass of 0.6 times the mass of sodium alginate and sodium persulfate with a mass of 0.1 times the mass of sodium alginate into the three-necked flask. Nitrogen was introduced into the three-necked flask at a rate of 50 mL / min, and the reaction was stirred for 5 hours at a temperature of 70 °C, and then freeze-dried to obtain a modified sodium alginate blank. The nano-calcium carbonate and water were mixed at a mass ratio of 1:50. In a beaker, add sodium dodecyl benzene sulfonate with 1 times the mass of nano-calcium carbona...

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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Abstract

The invention discloses a porous fiber non-woven fabric, and relates to the technical field of textiles. A preparation method comprises the following steps of firstly, mixing polyethylene glycol 200 and paraffin to prepare a mixed diluent; then preparing a modified sodium alginate blank from sodium alginate and vinyl acetate under the action of sodium persulfate; then mixing the modified sodium alginate blank with nano calcium carbonate treated with sodium dodecyl benzene sulfonate and polyethyleneimine to prepare modified sodium alginate; mixing the mixed diluent and the modified sodium alginate in a polymer, and carrying out mixing granulation and melt-blowing spinning to obtain a primary non-woven fabric; and finally, carrying out a mixing reaction on the primary non-woven fabric and a mixed aqueous solution, and performing filtering and freeze-drying to obtain the porous fiber non-woven fabric. The porous fiber non-woven fabric prepared by the method has better porosity and excellent mechanical properties.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a porous fiber nonwoven fabric. Background technique [0002] Melt blowing technology is a method of preparing ultra-fine fibers by spraying polymer melt with high-speed, high-temperature air flow (often close to the polymer melting point) to make it stretch rapidly, which can be formed into non-woven fabrics in one step. The non-woven fabric produced by the melt-blown technology and assembled by random stacking of fibers has very good structural properties, such as ultra-fine fibers, large specific surface area, high porosity, interconnected pore structure, and low solute diffusion resistance. Suitable for use as adsorption and filtration separation material. Meltblown non-woven products have unique advantages in medical protection (smog, bird flu, air purification), thermal insulation, sound absorption and noise reduction, sewage treatment (municipal wastewater, crude oil pol...

Claims

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/541D04H1/56D01D5/30D01D5/098D01F8/06D01F8/18D01F1/10D01F11/06
CPCD01D5/0985D01D5/30D01F1/10D01F8/06D01F8/18D01F11/06D04H1/541D04H1/56
Inventor 张琦
Owner 张琦