Preparation method of pinhole-free dedusting filter bag

A production method, a technology without pinholes, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of PM2. Low cost, good use effect and high filtering precision

Active Publication Date: 2015-03-25
SHANGHAI JINYOU FLUORINE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the large aperture of the needle seam and low air resistance, the dust filter bag made by the prior art tends to pass through the needle seam, which seriously affects the filtration efficiency of the bag, especially for PM2.5 dust.

Method used

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  • Preparation method of pinhole-free dedusting filter bag

Examples

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Comparison scheme
Effect test

Embodiment 1

[0014] See attached figure 1 , filter bag 1 of the present invention adopts the polyester spun-bonded non-woven fabric of composite polytetrafluoroethylene microporous film on the dust face to make, and bag body 2 adopts three needles to sew, and bag mouth 3 adopts four needles to sew. On the sewing needle of the filter bag 1, the microporous belt 4 that is single-sidedly sintered and shaped is hot-pressed, and the microporous belt 4 is covered on the needle seams of the sewing bag body 2 and the bag mouth 3, so as to improve the quality of the sewing filter bag 1. The filter accuracy at the needle seam, the specific production is carried out according to the following steps:

[0015] a. Preparation of microporous tape

[0016] The surface of the polytetrafluoroethylene microporous membrane with a three-dimensional fibrous microporous structure is coated with a meltable polytetrafluoroethylene emulsion at a rate of 5g / ㎡. The average pore diameter of the microporous membrane ...

Embodiment 2

[0020] The filter bag 1 of the present invention is made of polyester needle-punched felt compounded with polytetrafluoroethylene microporous film on the dust-facing surface, the bag body 2 is sewn with three needles, and the bag mouth 3 is sewn with four needles. On the sewing needle line of the filter bag 1, the single-sided sintered microporous belt 4 is heat-pressed and composited, and the microporous belt 4 is covered on the needle seams of the sewing bag body 2 and the bag mouth 3 to improve the sewing of the filter bag 1. The filter accuracy at the needle seam, the specific production is carried out according to the following steps:

[0021] a. Preparation of microporous tape

[0022] The surface of the polytetrafluoroethylene microporous membrane with three-dimensional fibrous microporous structure is coated with polytetrafluoroethylene emulsion at 30g / ㎡. The average pore diameter of the microporous membrane is 1.5 microns, the thickness is 40 microns, the strength is...

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PUM

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Abstract

The invention discloses a preparation method of a pinhole-free dedusting filter bag. A filter bag is adopted, wherein the filter bag is sewn by a punched felt or nonwoven cloth the dustward surface of which is compounded with a polytetrafluoroethylene micro-pore film; a bag body is sewn by three stitches, and the bag opening is sewn by four stitches. The preparation method of the pinhole-free dedusting filter bag is characterized in that the sewing needle and thread of the filter bag is compounded with a micro-pore band which is sintered and shaped in a single surface in a hot pressing mode, and the micro-pore band covers stitch clearances of the bag body and the bag opening, so that the filtering precision at the stitch clearances of the sewn filter bag is improved; the hot pressing temperature is 400-1000 DEG C, and the compounding pressure is 0.2-1MPa. Compared with the prior art, the pinhole-free dedusting filter bag is high in filtering precision, good in dedusting efficiency, and the technical scheme is especially suitable for filter bags used for filtering PM2.5 dust; the effective filtering rate of PM2.5 dust can reach 99.99%; the pinhole-free dedusting filter bag is convenient to manufacture, is low in production cost, has a good use effect, and the preparation method is a PM2.5 filter bag manufacturing method with good application prospect and practical value.

Description

[0001] technical field [0002] The invention relates to the technical field of dust-removing filter bags, in particular to a method for manufacturing a pinhole-free dust-removing filter bag for filtering PM2.5 dust. Background technique [0003] At present, dust filter bags are generally made of polyester needle felt, polyphenylene sulfide needle felt, aramid needle felt, glass fiber woven fabric or polyester spunbonded non-woven fabric. The filter bag interface is sewn with three needles. The diameter of the sewing needle is about 0.5~2mm. The diameter of the sewing thread is removed. The diameter of each pinhole is calculated as 0.1mm, and the area of ​​each pinhole is 0.00785mm 2 . The average particle size of PM2.5 dust is 2.5μm, which is 0.0025mm, and the projected area is 0.00000491mm 2 That is to say, each pinhole area can be penetrated by 1599 PM2.5 dust at the same time, and a dust filter bag with a diameter of 130mm and a length of 6000mm is sewn with three stit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B01D46/02B01D46/54
Inventor 黄斌香黄磊顾榴俊
Owner SHANGHAI JINYOU FLUORINE MATERIALS
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