PBS/PP two-component melt-blown fiber filtering material and preparation method thereof

Abstract

The invention discloses a PBS / PP two-component melt-blown fiber filtering material and a preparation method thereof. The fineness range of the filtering material is 0.8-10 microns, and the average fineness is 4-6 microns; and the thickness of the filtering material is 100 + / -2mm, the filtering material is die-cut into a plurality of square-hole-shaped blocky filtering materials, the gap diameter of the filtering materials is 5-70 microns, the porosity of the filtering materials is 90-95%, the specific surface area of the filtering materials is 8000 m<2> / m<3>, and the scale containing rate is (9-11) KgSS / m<3>. The method of making the filtering material produces the filtering material through several steps. The invention provides the PBS / PP two-component melt-blown fiber filtering materialand the preparation method thereof. The preparation method has the advantages of short process flow, controllable preparation process and energy saving. The obtained filtering material has three-dimensional pores inside, can intercept, adsorb and filter impurities with different sizes respectively, not only increases the filtering area and dirt holding capacity, but also has higher strength, and ensures that the filtering material has the advantages of strong filterability, good filtering effect, durability, good hydrophilic water filtering property, easiness in backwashing, water saving, highefficiency and the like.

Description

technical field [0001] The invention relates to a filter material and a method, in particular to a PBS / PP two-component melt-blown fiber filter material and a manufacturing method thereof. Background technique [0002] Melt-blown nonwovens are made by melting high polymer slices through a screw extruder, extruding them into fibers through the spinneret holes, and making them strongly stretched under the blowing of high-speed hot air to form extremely Fine fibers, these fibers are directly formed into cloth by random laying. Melt-blown fibers have large specific surface area, small voids and large porosity, and are excellent thermal insulation and filter materials. [0003] In the field of filter materials, most of the melt-blown filter materials currently used are PP single-component fibers. After electret treatment, the filtration efficiency can reach 99.99%, but the strength of the product is low, and the filtration resistance cannot reach high efficiency. The requiremen...

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Problems solved by technology

[0005] At present, the main two-component melt-blown fiber nonwoven fabric on the market is PLA fiber and PP fiber bonded into a mesh cloth. There are problems such as poor distribution uniformity between fibers, resulting in uneven gap size and poor structural endurance. They exist in sewage treatment, etc. In terms of application, there are many shortcomings such as low filtration efficiency. When using the existing two-component melt-blown fiber non-woven fabric as the filter material, it is easy to cause filter layer hardening and partial current short circuit, resulting in the failure of the filter equipment to work normally. The filter material needs to be replaced. It is cumbersome and expensive; the filter material is often not rinsed thoroughly in the filter equipment, resulting in unqualified water produced by the filter equipment, which affects the stable operation of the subsequent system, and because the filter material in the filter equipment is not easy to rinse, this makes the filter material in the process The waste water is time-consuming when stirring and backwashing, and the backwashing water accounts for 3%-5% of the produced water ratio, which consumes a lot of water and seriously wastes water resources

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