Spunlace laminating joint strip and ultra-low emission dust removal filter bag

Abstract

The invention relates to a preparation method of a spunlace film-coated joint strip, the spunlace film-coated joint strip and an ultralow-emission dust removal filter bag. The preparation method of the spunlace laminating joint strip comprises the steps that polyphenylene sulfide or polyphenylene sulfide mixed polytetrafluoroethylene fibers are subjected to opening, mixing, carding, lapping and drafting and then fed into a spunlace entanglement reinforcing system, pre-wetting spunlace is carried out, then second spunlace is carried out, and after spunlace, a fiber web becomes spunlace non-woven fabric with certain mechanical performance and appearance. According to the spunlace laminating joint strip and the ultralow-emission dust removal filter bag adhered with the spunlace laminating joint strip, the polyphenylene sulfide or polyphenylene sulfide spunlace laminating non-woven joint strip can be well adhered with filter material sewing needle holes and gaps generated by lap joint of the dust removal filter bag, and the spunlace laminating joint strip and the ultralow-emission dust removal filter bag have the advantages of attractive weld seam, firm adhesion, high dust removal efficiency and the like. Dust leakage of sewing needle holes of the dust removal filter bag is prevented, and the filtering precision of the needle seams of the filter bag is improved; and the existing gluing or PTFE sealing film and dust removal filter bag sewing combination mode can be effectively replaced.

Description

technical field [0001] The invention relates to a spunlace film-coated strip and an ultra-low-emission dust-removing filter bag bonded with the strip, belonging to the field of industrial environmental protection dust-removing filter bag manufacturing. Background technique [0002] Because there are stitching pinholes and filter material overlap gaps in the bag head, bag body, and bag bottom of the dust filter bag, the dust filter bag is repeatedly filtered and cleaned for a long time during the operation of the dust collector, and the dust is released from the filter bag. Risk of penetration or even penetration by pinholes and crevices. According to the national standard for bag filter bag sewing, the number of stitches within 10cm of the filter bag should be 30 ± 5 stitches. The interface of the dust filter bag is generally sewn with double needles, tied three times, and the body of the bag is three stitches. Sewn, the bottom of the bag is double-needled and tied twice. ...

AI Technical Summary

Problems solved by technology

The entire above filter bag has a total of about 5583.3 pinholes, and the total pinhole area is 43.82mm 2 , can simultaneously allow 8.92x10 6 PM2.5 dust passes through. Different bag body seams have different effects on the PM2.5 filtration efficiency of the bag filter. Sewing pinholes are the main reason for the low PM2.5 filtration efficiency of the sewn filter bag.

[0003] In recent years, environmental protection efforts have gradually increased, especially the proposal of ultra-low dust emission standards, which poses new challenges to existing dust removal technologies. In order to meet increasingly stringent environmental protection requirements, reduce dust emissions from leakage from pinholes and gaps in filter bags The risk of exceeding the standard. At present, most enterprises use two processes of online glue application and PTFE tape to prevent leakage of the pinholes of the filter bag body. However, these two processes have defects, and the online glue application process glue is short It is not easy to dry within a short period of time, and the glue is easy to adhere to the filter bag body and the operator, which is neither environmentally friendly nor beautiful. The glue turns yellow and fails under high temperature and corrosive working conditions, and cannot prevent pinholes. Leak-proof effect, the other is PTFE tape, which is a material with excellent high temperature resistance and stable chemical properties, but its attachment to the suture does not rely solely on the fusion of PTFE tape and filter bag by hot pressing, but on the adhesion of adhesives , once the adhesive fails, the PTFE tape will fall off as a whole, and there is a risk of dust leakage from the pinhole

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