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Deep filter element with crude and fine fiber mixed structure and preparation method of deep filter element

A deep filtration, fine fiber technology, applied in filtration and separation, membrane filter, fiber treatment, etc., can solve the problems of unfavorable filter element gradient structure, unable to meet nano-level high filtration accuracy, constant fiber density and other problems, and achieve good filtration effect. , better filtering effect, uniform distribution of fine fiber diameter

Pending Publication Date: 2020-09-01
HANGZHOU COBETTER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has high filtration efficiency, dirt holding capacity and service life, the fiber density in the radial direction is constant, which is not conducive to the advantages of the gradient structure function of the filter element, and the fiber diameter is above 1.5 μm, which cannot meet the high filtration accuracy of nanometer level. requirements

Method used

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  • Deep filter element with crude and fine fiber mixed structure and preparation method of deep filter element
  • Deep filter element with crude and fine fiber mixed structure and preparation method of deep filter element
  • Deep filter element with crude and fine fiber mixed structure and preparation method of deep filter element

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Effect test

Embodiment 1

[0105] In this embodiment, two filter layers including an inner filter layer and an outer filter layer are included, the inner filter layer includes interwoven coarse fiber sets and fine fiber sets, the outer filter layer includes interwoven coarse fiber sets and thin fiber sets, and the inner filter layer includes interwoven coarse fiber sets and fine fiber sets. The thickness of the filter layer and the outer filter layer are both 7mm;

[0106] The fiber diameter of the coarse fiber set of the inner filter layer is 0.8-1.5 μm, and the average diameter of the fiber of the coarse fiber set of the inner filter layer is 1.18 μm; the fiber diameter of the fine fiber set of the inner filter layer is 0.3-0.8 μm, and the fine fiber set of the inner filter layer The average diameter of the fibers is 0.56 μm; the average diameter of the thick fiber set in the inner filter layer is 2.11 times the average diameter of the fine fiber set.

[0107] The fiber diameter of the coarse fiber se...

Embodiment 2

[0133] In this embodiment, three filter layers including the innermost layer, the innermost layer and the outermost layer are included, and the innermost layer, the innermost layer and the outermost layer each include a set of coarse fibers and a set of thin fibers interwoven with each other, and the innermost layer The thickness of the layer, near inner layer and outermost layer are different, they are 4mm, 5mm, 5mm respectively;

[0134] The fiber diameter of the innermost coarse fiber set is 0.6-3 μm, and the average fiber diameter of the innermost thick fiber set is 1.20 μm; the fiber diameter of the innermost thin fiber set is 0.3-0.8 μm, and the innermost fine fiber set The average fiber diameter is 0.60 μm; the average diameter of the innermost thick fiber set is twice the average diameter of the thin fiber set.

[0135] The fiber diameter of the thick fiber set near the inner layer is 1-3.2 μm, and the average fiber diameter of the thick fiber set near the inner layer ...

Embodiment 3

[0154] In this embodiment, four filter layers including the innermost layer, the near inner layer, the near outer layer and the outermost layer are included, and each filter layer includes a set of coarse fibers and a set of fine fibers interwoven with each other, and each filter layer The thickness is 3.5mm;

[0155] The fiber diameter of the innermost thick fiber set is 1.7-7μm, and the average fiber diameter of the innermost thick fiber set is 3.16μm; the fiber diameter of the innermost thin fiber set is 0.3-1μm, and the fiber diameter of the innermost thin fiber set is The average diameter is 0.8 μm; the average diameter of the innermost coarse fiber set is 3.95 times the average diameter of the thin fiber set.

[0156] The fiber diameter of the near-inner thick fiber set is 2.5-11.9 μm, and the average fiber diameter of the near-inner thick fiber set is 5.36 μm, which is 69.6% larger than the fiber average diameter of the innermost thick fiber set; the near-inner thin fib...

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Abstract

The invention discloses a deep filter element with a crude and fine fiber mixed structure. The deep filter element at least comprises two filtering layers; each filtering layer comprises a crude fiberset and a fine fiber set which are interwoven with each other; the average diameter of the crude fiber set of each filtering layer is reduced from the outer side to the inner side; the average diameter of the fine fiber set of each filtering layer is reduced from the outer side to the inner side; the fiber diameter of the fine fiber set of the innermost filtering layer is not larger than 1 micrometer; the fiber diameter of the crude fiber set of the outermost filtering layer is not smaller than 5 micrometers. The invention further discloses a preparation method of the deep filter element withthe crude and fine fiber mixed structure. The preparation method comprises the following steps of: 1) melt spinning; and 2) receiving a finished screen. The crude coarse fiber sets play a role in bonding the fine fiber sets and play a role in supporting, and therefore, the filter element is prevented from being compressed in a using process, and a dirt containing amount is increased, the fine fiber sets play a role in filtering and intercepting, so that filtering precision is improved, and the filter element has the functions of high filtering precision, high dirt containing capacity and longservice life and is good in 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 cores, in particular to a deep filter filter core with a mixed structure of thick and thin fibers 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. The non-woven melt-blown filter element has a unique three-dimensional structure with a disorderly distribution, and has a small gap and a large specific surface area. areas such as conservation play an important role. [0003] In recent years, with the rapid development of the semiconductor industry, higher requirements have been placed on polishing technology. Chemical mechanical polishing (CMP) is currently the only process technology that can achieve comprehensive planarization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16D01D5/098D04H1/541D04H1/56D04H1/76
CPCB01D39/1607B01D2239/0622D01D5/0985D04H1/541D04H1/56D04H1/76
Inventor 贾建东徐建明郑海明
Owner HANGZHOU COBETTER TECH CO LTD
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