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Composite structure filter felt and its preparation method and application

A composite structure and filter felt technology, which is applied in the field of filter materials, can solve the problems of short service life, low air filtration efficiency, secondary pollution, etc., and achieve prolonging service life, improving charge persistence dependence, and high fiber specific surface area Effect

Active Publication Date: 2017-10-03
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing filter materials still have the defects of low air filtration efficiency, short service life and secondary pollution.

Method used

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  • Composite structure filter felt and its preparation method and application
  • Composite structure filter felt and its preparation method and application
  • Composite structure filter felt and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A filter felt with a composite structure in this embodiment, the schematic diagram of its laminated structure is as follows figure 1 As shown, it consists of a filter functional layer and a protective layer coated on the upper and lower surfaces of the filter functional layer, wherein the filter functional layer is composed of a regenerated fiber layer with a three-dimensional crimped structure fiber and an electrospun nanofiber layer. The protective layer on the upper and lower surfaces has a grammage of 25g / m 2 Metallocene polypropylene spunbonded single-layer nonwoven fabric; the regenerated fiber layer has a grammage of 15g / m 2 The Z-shaped crimped viscose fiber web layer, wherein the viscose fiber has a non-circular interface, no cavity, the fiber diameter is 30-35 μm, and the number of crimps is 12 / 25mm. The Z-shaped crimped viscose fiber Structural diagram such as figure 2 Shown; The nanofiber layer has a grammage of 0.8g / m 2 The polylactic acid fiber layer, ...

Embodiment 2

[0040] A filter felt with a composite structure in this embodiment, the schematic diagram of its laminated structure is as follows figure 1 As shown, it consists of a filter functional layer and a protective layer coated on the upper and lower surfaces of the filter functional layer, wherein the filter functional layer is composed of a regenerated fiber layer with a three-dimensional crimped structure fiber and an electrospun nanofiber layer. The protective layer on the upper and lower surfaces has a grammage of 20g / m 2 Metallocene polypropylene and ordinary polypropylene SMS nonwoven fabrics; the regenerated fiber layer is a helical crimped cuprammonium fiber single fiber, wherein the cuprammonium fiber has a cavity, the cavity ratio is 15%, and the fiber diameter is 20~ 25 μm, the number of crimps is 15 / 25mm, the structure schematic diagram of the copper ammonium fiber with helical crimp structure is as follows image 3 Shown; The nanofiber layer has a grammage of 0.1g / m 2...

Embodiment 3

[0045] A filter felt with a composite structure in this embodiment, the schematic diagram of its laminated structure is as follows figure 1 As shown, it consists of a filter functional layer and a protective layer coated on the upper and lower surfaces of the filter functional layer, wherein the filter functional layer is composed of a regenerated fiber layer with a three-dimensional crimped structure fiber and an electrospun nanofiber layer. The protective layer on the upper and lower surfaces has a grammage of 40g / m 2 of polyethylene and 25g / m 2 Polyolefin copolymer spunbonded nonwoven fabric; the regenerated fiber layer has a grammage of 10g / m 2 Saponified acetate fiber with wavy crimp structure, wherein the saponified acetate fiber has no cavity, non-circular cross-section, fiber diameter of 5-10 μm, and number of crimps is 8 / 25mm, the saponified acetate fiber with wavy crimp structure Structural diagram such as Figure 4 Shown; The nanofiber layer has a grammage of 1.0...

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Abstract

The invention belongs to the technical field of filter materials and discloses a composite structure filter felt and its preparation method and application. The composite structure filter felt is composed of a filtering function layer and protective layers coating the upper and lower surfaces of the filtering functional layer. The filtering function layer is prepared from a regenerated fiber layer containing 3D crimped structural fibers and an electrospinning nano-fiber layer through compounding. The composite structure filter felt has a fluffy filtering material skeleton structure of renewable micrometer fibers containing 3D crimped structural fibers and utilizes secondary electrospinning nanofibers attached to the micrometer fibers so that a high fiber specific surface area is obtained. The filter felt has the advantages of high filtration efficiency, low resistance and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to a filter felt with a composite structure and a preparation method and application thereof. Background technique [0002] Air is a necessary condition for human survival. Due to the influence of production and various human activities, especially the large and random discharge of industrial waste gas, the air contains excessive dust and harmful gases and is polluted to varying degrees. In the past few years, PM2.5 has attracted widespread attention from the society. Dust can cause great harm to organs such as the respiratory tract and eyes. According to the "Green GDP Accounting Report", the city of Beijing alone has an annual loss of more than 11.6 billion yuan due to environmental pollution. Among them, the economic loss caused by air pollution to Beijing is the most serious, as high as 9.52 billion yuan, accounting for 9.52 billion yuan of total pollution. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D39/16B01D46/00D01D5/00D04H1/4258D04H1/42D04H1/4374
CPCB01D39/14B01D39/1615B01D39/1623B01D46/00D01D5/0084D04H1/42D04H1/4258D04H1/4374B01D2239/10B01D2239/025B01D2239/0618B01D2239/0622B01D2239/0631B01D2258/06
Inventor 严玉蓉廖帼英张鹏朱锐钿赵耀明杨苏邯花金龙张文韬陆树兴邹飞邓玲利
Owner SOUTH CHINA UNIV OF TECH
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