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A kind of non-woven film-coated filter material with high air permeability, its preparation method and film-coating device used therein

A technology of non-woven fabric and film-coated filter material, which is applied in the field of non-woven film-coated filter material with high air permeability, which can solve the problem of affecting the air volume and service life of film-covered filter material, affecting the service life of filter bags and membrane strength , reduced air permeability and other issues, to achieve the effect of simple structure, easy control, and reduced damage

Active Publication Date: 2015-10-28
SINOMA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This brings the following problems: Whether it is adhesive coating or high-temperature hot-pressing coating, the PTFE microporous membrane is almost completely bonded to the plane of the woven fabric substrate, and the entire membrane surface of the PTFE microporous membrane is subjected to high temperature and pressure. The damage of the film will reduce the strength and air permeability of the membrane; if the base material is a chemical fiber woven fabric, it may also block the PTFE micropores due to melting chemical fibers or rolling adhesive points, resulting in a decrease in air permeability; similarly, the base material It is also hot-pressed very densely, which affects the processing air volume and service life of the film-coated filter material
Especially when the ambient temperature is low and the folds are too heavy, film cracks will appear on the membrane surface or creases of the film-coated filter material, which seriously affects the filtration efficiency and the service life of the filter bag.

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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  • A kind of non-woven film-coated filter material with high air permeability, its preparation method and film-coating device used therein
  • A kind of non-woven film-coated filter material with high air permeability, its preparation method and film-coating device used therein
  • A kind of non-woven film-coated filter material with high air permeability, its preparation method and film-coating device used therein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The non-woven fabric substrate is made of P84 fiber and non-alkali glass fiber raw materials, and the P84 fiber content is 15%. The process is: unpacking, rough opening 1, rough opening 2, fine opening 1, fine opening 2, cotton feeding, double doffer and single cylinder carding, mechanical laying, PTFE base fabric, pre-acupuncture, main needle Pricking 1, main needling 2, main needling 3, convex needling machine, winding. That is to say, in the existing felting unit, a convex needling device is added in front of the winder; the surface density is 1000g / m2 , the felt thickness is 3.3±0.2mm, the natural height of the convex point is 0.7mm; the length of the triangular needle is 76mm, the length of the working section is 20mm, tapered, the triangular molding needle, the height of the needle triangle is 0.55mm; the length of the fork-shaped needle is 65mm, the fork size 0.25×0.25mm; cross-needle pattern, 1 needle left and right, needle density 3000 pieces / m, convex needling...

Embodiment 2

[0040] The non-woven fabric base material is made of aramid fiber (15%) mixed with alkali-free glass fiber. The process is: unpacking, rough opening 1, rough opening 2, fine opening 1, fine opening 2, cotton feeding, Double doffer single cylinder carding, mechanical laying, PTFE base fabric, pre-needling, main needling 1, main needling 2, main needling 3, raised needling machine, winding, surface density 900g / m 2 , the length of the triangular needle is 76mm, the length of the working section is 20mm, tapered, the triangular die needle, the height of the needle triangle is 0.55mm; the length of the fork-shaped needle is 65mm, and the size of the fork is 0.25×0.25mm; Needle layout, needle density 3000 pieces / m, convex needling depth (for triangular needles) 14mm, needling density 12 needles / cm 2 , The length difference between the two needles is 9mm, the felt thickness is 3.1±0.2mm, and the natural height of the bump is 0.5mm.

[0041] The base material obtained above was trea...

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PUM

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Abstract

The invention discloses a high-air permeability non-woven fabric laminated filtering material and a preparation method thereof as well as a laminating device. The high-air permeability non-woven fabric laminated filtering material comprises a non-woven fabric base material and a PTFE (Polytetrafluoroethylene) microporous membrane, wherein salient points are arranged on the non-woven fabric base material, and the PTFE microporous membrane is compounded on the salient points. The preparation method of the high-air permeability non-woven fabric laminated material comprises the following steps: bulging the surface of the non-woven fabric base material, and compounding the bulged surface with the PTFE microporous membrane at intervals at high temperature through hot pressing, thus obtaining the high-air permeability non-woven fabric laminated filtering material. Due to the adoption of the preparation method, the problems that a conventional laminated filtering material is low in air permeability and short in service life and the membrane is seriously damaged are solved. The high-air permeability non-woven fabric laminated filtering material is high in air permeability, large in treatment air volume and long in service life and has relatively high fracture resistance property; the preparation method is simple and capable of substantially reducing the damage to the membrane; the laminating device is simple in structure, convenient to use and easy to control.

Description

technical field [0001] The invention relates to a non-woven film-coated filter material with high air permeability, a preparation method thereof and a film-coating device used therefor. Background technique [0002] In the atmospheric dust removal industry, the film-coated filter material is widely used due to its surface filtration characteristics of high filtration efficiency, low running resistance, easy and less cleaning times, large air volume and long service life. There are two kinds of film-covering processes for film-coated filter materials: one is the binder method, and the other is the high-temperature hot-pressing method. The former is gradually eliminated due to the poor temperature resistance of the binder and the aging of the binder, while the latter is a widely used process. The core equipment of the hot press laminating machine used in the high temperature hot pressing method consists of a high temperature hot roller and a high temperature resistant rubber ...

Claims

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/14B32B37/06B32B37/10D04H1/4382D06M15/256D06M15/263D06M13/513
Inventor 白耀宗范凌云赵东波黄箭玲费传军董浩宇周群郭晓蓓吴涛朱平黎鹏杨振东宋尚军
Owner SINOMA SCI & TECH