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<p>Because the water purifier can produce high-quality pure water, it is mainly determined by the <a href="https://www.lyfilter.com/" rel="noopener noreferrer" target="_blank"><a href="https://www.lyfilter.com/" target="_blank">filter element</a></a>, and the PP filter element is the first-stage filter element of the water purifier, which plays a very important role in the water purifier. Introduce the 5 functions of PP cotton filter:</p><p><br></p><p><a href="https://www.lyfilter.com/pleated-filter-cartridge" rel="noopener noreferrer" target="_blank"> <a href="https://www.lyfilter.com/pleated-filter-cartridge" target="_blank">pp filter</a></a></p><p><br></p><p> 1 Hygiene and safety</p><p><br></p><p>Polypropylene undergoes melt-blown, traction, and receiving technology to make polypropylene fibers intertwined with each other through self-adhesion, forming PP cotton filter elements of different shapes and sizes. Unlike other filter elements, the bonding of PP cotton filter elements does not require other materials. As the chemical composition of PP is clean and meets food hygiene standards, it will not cause secondary pollution to the liquid to be filtered due to the material, and it is safer to use.</p><p><br></p><p><br></p><p>2 Good purification effect of particulate impurities</p><p><br></p><p>The water flows from the outside of the pp cotton to the inside, and is filtered layer by layer. The closer to the inner layer of the filter element, the smaller the pore size, the higher the filtration accuracy. When particulate impurities pass through the pores of the PP filter element, bridging will occur. Even particles smaller than the pores can be blocked, and more than 80% of the particulate impurities in the water will be filtered out at this level.</p><p><br></p><p> </p><p><br></p><p>3 Strong dirt holding capacity</p><p><br></p><p>The fiber of the outer layer of the PP cotton filter element is relatively thick, while the fiber of the inner layer is thinner, the outer layer is relatively loose, and the inner layer is tight, forming a multi-layer gradient structure with a gradually tightening diameter. The unique gradient deep filtration has formed a three-dimensional filter residue effect, so that each layer of the multi-layer structure can intercept and store impurities in the water. When many layers add up, the dirt holding capacity will be very large.</p><p><br></p><p><br></p><p>4 Large flow, low pressure drop</p><p><br></p><p>The raw material of PP cotton, polypropylene fiber, relies on self-adhesive entanglement to form a three-dimensional tortuous microporous structure, which is different from the fiber distribution in traditional fabrics and carded nonwovens. It has a larger specific surface area and a higher Porosity. The large surface area and many small holes can allow water to pass through the PP cotton quickly without too much difference in the height of the inner and outer water, so not only the filtration flow is large, but the pressure difference is also small.</p><p><br></p><p> </p><p><br></p><p>5 Good chemical stability</p><p><br></p><p>The chemical stability of PP cotton is closely related to its raw material polypropylene. The chemical stability of polypropylene is very good, except that it can be corroded by concentrated sulfuric acid and concentrated nitric acid, it is relatively stable to various other chemical agents. Because of this performance, pp cotton is widely used in water purification and filtration of strong acids, alkalis and organic solvents.</p><p><br></p><p>Therefore, when replacing the filter element of the water purifier in the future, everyone should buy a good quality PP filter element.</p>
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