Method for improving interlayer bonding strength of polyphenylene sulfide non-woven fabrics compound filter material

Abstract

The invention discloses a method for improving interlayer bonding strength of a polyphenylene sulfide non-woven fabrics compound filter material, and belongs to the field of filter materials. The method aims to improve interlayer bonding strength of the compound filter material and comprises the steps of A, mingling polyphenylene sulfide short fiber in polyphenylene sulfide superfine fibermesh; B, conducting composite strengthening between polyphenylene sulfide superfine fibermesh mingled with polyphenylene sulfide short fiber and polyphenylene sulfide short fibermesh.

Description

technical field [0001] The invention relates to the preparation of a filter screen, in particular to the preparation process and technology of the melt blown polyphenylene sulfide fiber net layer. Background technique [0002] Webs containing fibers, especially melt-blown fibers, are widely used in applications such as filtering fixed particles and grease, heat insulation, and sound insulation. [0003] Among them, the above-mentioned application of filtering solid particles also includes dust collectors or masks for filtering particles. [0004] In the production of this kind of net, it is necessary to fix the multi-layer net together. [0005] The performance of the filter bag used in the bag filter is one of the main factors affecting its filtering effect. The filter material made of polyphenylene sulfide (PPS) has excellent heat resistance, corrosion resistance and flame retardancy. , suitable for use under high temperature and harsh conditions, mainly used in dust rem...

AI Technical Summary

Problems solved by technology

However, due to the low strength of the melt-blown ultrafine fiber, it is easy to break during the composite process of the embedding method, resulting in a low bonding strength between the melt-blown layer and the base cloth layer. Layer and base fabric layer are easy to wear and fall off

[0007] Chinese patent (patent No. CN102160944A and CN204246952U) has introduced a kind of filter material that adopts superfine fiber as the surface layer, and then compounded with the base cloth layer and the bottom layer, but how to solve the problem of the combination of the surface layer, the base cloth layer, and the bottom layer There is no corresponding technical description

[0008] Chinese patent 200780031924.6, published on August 19, 2009, the name of the invention patent is "heat-resistant non-woven fabric", which discloses a polyphenylene sulfide heat-resistant non-woven fabric, which is made by thermal bonding Multi-layer spun-bonded non-woven fabric, the multi-layer non-woven fabric of the invention has high filtration accuracy, but the invention patent has high requirements on the thermal bonding process, because the thicker fiber layer is not easy to conduct heat, it is easy to bond between the fiber layers The fibers that contact the surface of the hot roller have been melted, and the inner fiber layer is not heated enough to achieve the bonding of thicker fiber layers, which makes the combination of different fiber layers of the filter material weak, resulting in a short service life of the filter material

However, since the base cloth layer and subsequent reinforcement treatment are not used, the filter material prepared by this method is not strong enough and is easily damaged, and it is also not suitable for filter bag preparation and high-temperature dust removal.

[0010] It can be seen from this that in the existing technology, although the developed polyphenylene sulfide filter material has good thermal stability and high filtration accuracy, the interlayer bonding strength is low, and the layers are easy to wear and fall off. short service life