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Preparation method of high-strength composite polypropylene fibers

A composite polypropylene, high-strength technology, applied in the direction of conjugated synthetic polymer rayon, cellulose/protein conjugated rayon, etc., to achieve the effect of improving strength, good air permeability and filterability

Inactive Publication Date: 2021-05-18
WUXI YOUJIA NON WOVEN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a method for preparing high-strength composite polypropylene fibers, which solves the problem of air permeability of polypropylene non-woven fabrics, and uses methyl silicone resin to form a strong middle layer, which not only has strength, but also It also has a mesoporous structure to achieve good air permeability and filterability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of high-strength composite polypropylene fiber, comprising the steps of:

[0020] Step 1: Add ethyl cellulose to 1L of absolute ethanol, add it to ammonium carbonate and stir evenly to form a viscous suspension, and then perform constant temperature extrusion spinning on the viscous suspension to form the first filament ; The mass ratio between the ethyl cellulose and absolute ethanol is 10:1, the addition of the ammonium carbonate is 50% of the ethyl cellulose quality, the stirring speed of stirring is 1000r / min, and the temperature is 20 ° C; the temperature of the constant temperature extrusion spinning is 40 ° C, the pressure is 0.3 MPa, and the diameter of the first filament is 200 nm;

[0021] Step 2: Add methyltrichlorosilane to 1L of ether and sonicate at low temperature for 20 minutes, then spray evenly on the surface of the first fiber, and dry at constant temperature to obtain the second fiber; the concentration of the methyltrichlorosila...

Embodiment 2

[0026] A preparation method of high-strength composite polypropylene fiber, comprising the steps of:

[0027] Step 1: Add ethyl cellulose to 1L of absolute ethanol, add it to ammonium carbonate and stir evenly to form a viscous suspension, and then perform constant temperature extrusion spinning on the viscous suspension to form the first filament ; The mass ratio of the ethyl cellulose and absolute ethanol is 10:3, the addition of the ammonium carbonate is 300% of the ethyl cellulose quality, the stirring speed of stirring is 2000r / min, and the temperature is 30 ° C; the temperature of the constant temperature extrusion spinning is 50 ° C, the pressure is 0.5 MPa, and the diameter of the first filament is 500 nm;

[0028] Step 2: Add methyltrichlorosilane to 1L of ether and sonicate at low temperature for 30 minutes, then spray evenly on the surface of the first fiber, and dry at constant temperature to obtain the second fiber; the concentration of the methyltrichlorosilane i...

Embodiment 3

[0033] A preparation method of high-strength composite polypropylene fiber, comprising the steps of:

[0034] Step 1: Add ethyl cellulose to 1L of absolute ethanol, add it to ammonium carbonate and stir evenly to form a viscous suspension, and then perform constant temperature extrusion spinning on the viscous suspension to form the first filament ; The mass ratio of said ethyl cellulose to absolute ethanol is 5:1, the add-on of said ammonium carbonate is 150% of the ethyl cellulose quality, the stirring speed of stirring is 1500r / min, and the temperature is 25 ° C; the temperature of the constant temperature extrusion spinning is 45 ° C, the pressure is 0.4 MPa, and the diameter of the first filament is 300 nm;

[0035] Step 2: Add methyltrichlorosilane to 1L of ether and sonicate at low temperature for 25 minutes, then spray evenly on the surface of the first fiber, and dry at constant temperature to obtain the second fiber; the concentration of the methyltrichlorosilane in ...

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Abstract

The invention discloses a preparation method of high-strength composite polypropylene fibers. The method comprises the following steps of adding ethyl cellulose into absolute ethyl alcohol, adding the ethyl cellulose into ammonium carbonate, performing uniform stirring to form a viscous suspension, and carrying out constant-temperature extrusion spinning on the viscous suspension to form first fiber yarns; adding methyltrichlorosilane into diethyl ether, carrying out low-temperature ultrasonic treatment for 20-30 minutes, uniformly spraying a mixture on the surfaces of the first fiber yarns, and carrying out constant-temperature drying to obtain second fiber yarns; adding polypropylene into methylbenzene for dissolving, adding diethyl ether, and performing low-temperature ultrasonic treatment to form dispersion liquid; then forming fiber surface coating by taking the second fiber yarns as center lines and the dispersion liquid as adhesive liquid to obtain preformed fiber yarns; and adding the preformed fiber yarns into a reaction kettle, performing standing for 2-3 hours at a constant temperature, and then performing heating and standing for 30-60 minutes to obtain the high-strength composite polypropylene fibers. The air permeability problem of a polypropylene non-woven fabric is solved, the strong middle layer is formed by methyl silicone resin, and the composite polypropylene fibers have high strength and mesoporous structures.

Description

technical field [0001] The invention belongs to the field of non-woven fabrics, and in particular relates to a preparation method of high-strength composite polypropylene fibers. Background technique [0002] Non-woven fabrics, also known as non-woven fabrics, needle-punched cotton, etc., are composed of oriented or random fibers. It is called cloth because of its appearance and certain properties. Non-woven fabrics have the characteristics of moisture-proof, breathable, flexible, light weight, non-combustible, easy to decompose, non-toxic and non-irritating, rich in color, low in price, and recyclable. For example, polypropylene pellets are mostly used as raw materials, which are produced by continuous one-step process of high-temperature melting, spinning, laying, and hot-pressing coiling. [0003] With the use of polypropylene fiber non-woven fabrics in the field of masks, the hydrophobicity of polypropylene itself is prone to decrease in air permeability. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/06D01F8/02D01F8/16
CPCD01F8/06D01F8/02D01F8/16
Inventor 施梦杰
Owner WUXI YOUJIA NON WOVEN TECH