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Melt-blown filter medium with nano/micro-scale fiber interlocking structure and preparation method thereof

A technology of nanofibers and microfibers, which is applied in fiber processing, filament/thread forming, textiles and papermaking, etc., which can solve the problems of reduced service life of filters, limited dirt holding capacity, and easy clogging of filter materials, so as to reduce filtration Pressure resistance, good filtration effect, and the effect of improving the dirt holding capacity

Active Publication Date: 2022-03-29
HANGZHOU COBETTER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the production efficiency of this invention is improved compared to nanofibers produced by electrospinning, it is still far below the efficiency of non-woven fabrics produced by melt blowing
[0005] Japanese patent JP2016053241A discloses a non-woven fabric composed of ultra-fine fibers, the fiber diameter of which can reach less than 1 μm, and the distribution index is less than 1.3. Although the non-woven fabric of this structure has nano-level filtration accuracy, its ability to hold dirt is limited , the trapped particles are easy to block the filter material and reduce the service life of the filter

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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  • Melt-blown filter medium with nano/micro-scale fiber interlocking structure and preparation method thereof
  • Melt-blown filter medium with nano/micro-scale fiber interlocking structure and preparation method thereof
  • Melt-blown filter medium with nano/micro-scale fiber interlocking structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Such as Picture 1-1 , Figure 1-2 and figure 2 As shown, a melt-blown non-woven fabric with a nano / micro-scale fiber interlocking structure, including a nanofiber set and a micron fiber set, the nanofiber set and the micron fiber set are formed by melt blown from a mixture of at least two melted Index of the same or different polymer compositions.

[0079] The sets of nanofibers and microfibers are meltblown from a mixture of polymers comprising at least two of said polymers having a melt index, in this example the thermoplastic polymer polypropylene, which Contains polypropylene with high melt index and polypropylene with low melt index, wherein the melt index of high melt index polypropylene is 1800g / 10min, the content is 90wt%; the melt index of low melt index polypropylene is 28g / 10min, the content It is 5wt%; the mass ratio of high melt index polypropylene and low melt index polypropylene is 18:1.

[0080] The polymer is doped with a degrading agent for genera...

Embodiment 2

[0123] Such as Figure 3-1 , Figure 3-2 and Figure 4 As shown, a melt-blown non-woven fabric with a nano / micro-scale fiber interlocking structure, including a nanofiber set and a micron fiber set, the nanofiber set and the micron fiber set are formed by melt blown from a mixture of at least two melted Index of the same or different polymer compositions.

[0124] The sets of nanofibers and microfibers are meltblown from a mixture of polymers comprising at least two of said polymers having a melt index, in this example the thermoplastic polymer polypropylene, which Contains polypropylene with high melt index and polypropylene with low melt index, wherein the melt index of high melt index polypropylene is 1800g / 10min, the content is 90wt%; the melt index of low melt index polypropylene is 28g / 10min, the content It is 10wt%; the mass ratio of high melt index polypropylene and low melt index polypropylene is 9:1.

[0125] The mass proportion of the nanofiber set is 55%, and the...

Embodiment 3

[0158] Such as Figure 5-1 , Figure 5-2 and Figure 6 As shown, a melt-blown non-woven fabric with a nano / micro-scale fiber interlocking structure, including a nanofiber set and a micron fiber set, the nanofiber set and the micron fiber set are formed by melt blown from a mixture of at least two melted Index of the same or different polymer composition.

[0159] The sets of nanofibers and microfibers are meltblown from a mixture of polymers comprising at least two of said polymers having a melt index, in this example the thermoplastic polymer polypropylene, which Contains polypropylene with high melt index and polypropylene with low melt index, wherein the melt index of high melt index polypropylene is 1500g / 10min, the content is 85wt%; the melt index of low melt index polypropylene is 28g / 10min, the content It is 15wt%; the mass ratio of high melt index polypropylene and low melt index polypropylene is 13:3.

[0160] The mass proportion of the nanofiber set is 45%, and t...

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Abstract

The invention discloses a melt-blown filter medium with a nano / micron fiber interlocking structure, which at least includes: a nanofiber set, the fiber diameter of which is less than 1um, which includes a multi-level nanofiber combination with a gradient change in diameter, and a single-level nanofiber combination Fibers within or between nanofiber combinations at various levels are interwoven; micron fiber assemblies, with fiber diameters greater than 1 μm, including multiple micron fiber combinations with gradients in diameter, fibers within a single micron fiber combination or individual micron fiber combinations The fibers in between are interwoven; the nanofiber set and the microfiber set are formed by meltblowing a mixture composed of at least two polymers with the same or different melt indices. The invention also discloses a preparation method of the melt blown filter medium, which comprises the steps of: 1) mixing raw materials; 2) melt spinning; 3) receiving and forming. The combination of the nanofiber set and the micron fiber set in the present invention has a good filtering effect, improves the dirt holding capacity, reduces the filtering pressure resistance, and has good filtering effect.

Description

technical field [0001] The invention belongs to the technical field of nonwovens in the separation and filtration industry, in particular to the field of melt-blown filter media, in particular to a melt-blown filter medium with a nano / micron fiber interlocking structure and a preparation method thereof. Background technique [0002] Nonwoven materials have become an increasingly important filter material due to their excellent filtration performance, high output, and simple processing technology. Meltblown method is one of the important methods for one-step forming of nonwovens. Because of its advantages such as adjustable fiber fineness, messy and fluffy three-dimensional structure, good filtration efficiency and high production efficiency, it is widely used in food chemical industry, medical and health care, environmental protection and microelectronics industry. and other fields play a very important role. [0003] In recent years, with the rapid development of the semic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/541D04H3/147D01D5/088D01D5/30D01F8/06D01F8/12D01F8/14D01F8/16
CPCD04H1/541D04H3/147D01D5/30D01D5/088D01F8/06D01F8/14D01F8/16D01F8/12D10B2505/04
Inventor 贾建东徐建明郑海明
Owner HANGZHOU COBETTER TECH CO LTD
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