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Nanoscale superfine fiber composite melt-blown cloth and preparation method thereof

A technology of ultra-fine fiber and melt-blown cloth, which is applied in the direction of fiber type, fiber treatment, biochemical fiber treatment, etc., and can solve the problems of poor mechanical properties of melt-blown cloth, inability to take it out quickly, and rapid cooling

Inactive Publication Date: 2021-05-11
崔建中
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the web-formed microfiber has a certain back end, and the back side is attached to the drum, the traditional cooling method can only cool down the surface, and it is difficult to cool down quickly. Molten state, cannot be taken out quickly
Moreover, the mechanical properties of traditional melt-blown cloth are not good, and the distance between fibers is relatively large, which requires multi-layer superposition to achieve high filtration effect

Method used

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  • Nanoscale superfine fiber composite melt-blown cloth and preparation method thereof

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Effect test

Embodiment 1

[0034] A nano-scale superfine fiber composite melt-blown cloth mainly includes, in parts by weight: 10 parts of polypropylene, 35 parts of modified polypropylene, and 8 parts of modified bacterial cellulose.

[0035] A preparation method of nanoscale superfine fiber composite melt-blown cloth, mainly comprising the following steps:

[0036] (1) Mix polypropylene and maleic anhydride at a mass ratio of 5:2, add dicumyl peroxide of 0.1 times the mass of polypropylene, and extrude it with a twin-screw extruder at a temperature of 200°C. Granules to obtain modified polypropylene;

[0037] (2) Mix the modified polypropylene obtained in step (1) with polypropylene in a mass ratio of 3:1, after hot-melt extrusion, filter, and spin to obtain pretreated nano-scale superfine fiber composite melt-blown cloth;

[0038] (3) Mix bacterial cellulose and sodium periodate solution with a mass fraction of 3% at a mass ratio of 1:8, oxidize it at a temperature of 50°C for 10 hours, and then fil...

Embodiment 2

[0046] A nano-scale superfine fiber composite melt-blown cloth, mainly comprising: 10 parts of polypropylene, 35 parts of modified polypropylene, and 8 parts of bacterial cellulose in parts by weight.

[0047] A preparation method of nanoscale superfine fiber composite melt-blown cloth, mainly comprising the following steps:

[0048] (1) Mix polypropylene and maleic anhydride at a mass ratio of 5:2, add dicumyl peroxide of 0.1 times the mass of polypropylene, and extrude it with a twin-screw extruder at a temperature of 200°C. Granules, modified polypropylene;

[0049] (2) Mix the modified polypropylene obtained in step (1) with polypropylene in a mass ratio of 3:1, after hot-melt extrusion, filter, and spin to obtain pretreated nano-scale superfine fiber composite melt-blown cloth;

[0050] (3) Mix bacterial cellulose and acetone at a mass ratio of 1:10, and add diisopropylamine 0.2 times the mass of bacterial cellulose, and 6 times the mass of bacterial cellulose. The melt...

Embodiment 3

[0053] A nano-scale superfine fiber composite melt-blown cloth mainly includes 45 parts of polypropylene and 8 parts of modified bacterial cellulose in parts by weight.

[0054] A preparation method of nanoscale superfine fiber composite melt-blown cloth, mainly comprising the following steps:

[0055] (1) After the polypropylene is hot-melt extruded, filtered and spun, the pretreated nano-scale superfine fiber composite melt-blown cloth is obtained;

[0056] (2) Mix bacterial cellulose and sodium periodate solution with a mass fraction of 3% at a mass ratio of 1:8, oxidize it at a temperature of 50°C for 10 hours, and then filter with suction to obtain oxidized bacterial cellulose, which is oxidized Bacterial cellulose and ethylene glycol solution with a mass fraction of 30% were mixed and reacted for 1 hour at a mass ratio of 1:10, then suction filtered and freeze-dried to obtain a bacterial cellulose mixture blank, and the bacterial cellulose mixture blank and collagen gel ...

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Abstract

The invention discloses nanoscale superfine fiber composite melt-blown cloth and a preparation method thereof, and relates to the technical field of preparation of melt-blown cloth. The preparation method comprises the following steps of firstly preparing modified polypropylene from polypropylene and maleic anhydride under the action of an initiator, carrying out hot melt extrusion on the modified polypropylene and the polypropylene, performing filtering, and performing spinning to obtain pretreated nanoscale superfine fiber composite melt-blown cloth; then, oxidizing bacterial cellulose, sequentially reacting with ethylene glycol and a collagen gel solution to prepare a bacterial cellulose mixture, preparing porous microspheres from the bacterial cellulose mixture through a reverse suspension regeneration method, and mixing the porous microspheres with a mixed salt solution to prepare modified bacterial cellulose; and finally dispersing the modified bacterial cellulose in acetone, and under the action of the initiator, grafting the modified bacterial cellulose to the surface of the pretreated nanoscale superfine fiber composite melt-blown cloth to prepare the nanoscale superfine fiber composite melt-blown cloth. The nanoscale superfine fiber composite melt-blown cloth prepared by the method has excellent filtering performance.

Description

technical field [0001] The invention provides a nanoscale superfine fiber composite melt-blown cloth and a preparation method thereof, and relates to the technical field of melt-blown cloth preparation. Background technique [0002] Melt-blown cloth mainly uses polypropylene as the main raw material, which has many voids, fluffy structure, and good wrinkle resistance. The ultra-fine fibers with unique capillary structure increase the number and surface area of ​​fibers per unit area, so that the melt-blown cloth has a good Filterability, shielding, heat insulation and oil absorption. It can be used in air and liquid filter materials, isolation materials, absorption materials, mask materials, thermal insulation materials, oil absorption materials and wiping cloths and other fields. [0003] In the production process of melt-blown cloth, it is necessary to spray the melt and form ultra-fine fibers to fall on the drum, and then cool and shape it by blowing air to cool down. Ho...

Claims

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Application Information

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IPC IPC(8): D06M15/05D06M15/15D01F8/06D04H1/541D04H1/56D06M101/20
CPCD01F8/06D04H1/541D04H1/56D06M15/05D06M15/15D06M16/00D06M2101/20
Inventor 崔建中
Owner 崔建中
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