subject: Checklist For Polypropylene Filter Purchase [print this page] A polypropylene filter is used in several industrial sectors for a myriad of filtration applications. Polypropylene is essentially a thermoplastic polymer that is an integral part of our lives today. It is used in making bags, fabrics, various plastic components, and it is also used as a filter media.
However, in order to make filters, polypropylene needs to be melt-processed. This can be done using processes such as extrusion and molding. Extrusion produces fibers of polypropylene that can then be converted into fabrics and sheets. These polypropylene fibers are typically used for manufacturing face masks, diapers, pleated filter cartridges, and other products.
Uses of polypropylene filter cartridges
These filters are used in several small, mid, and high-volume filtration applications. Industries such as water treatment and purification, food and beverage, breweries, chemical processing, pharmaceutical, semiconductor, make use of such filters. The user needs to choose the right micron rating of a filter depending on the material to be filtered.
When selecting a filter for your application, you would need to keep certain basic criteria in mind. These important aspects include:
Micron retention ratings: There are several critical processes that call for the use of nominal or absolute rated filters. Filters that are available in a variety of configurations and micron retention ratings should be preferred in this case.
DOE or SOE filters: Double open end (DOE) filters are used for general purpose filtering operations. In many cases, they are preferred in pre-filtering applications too. Such filters are open at both ends. On the other hand, single open end (SOE) cartridges are open only on one end. Such cartridges are preferred in high-purity applications.
Process temperatures: In most cases, a polypropylene filter will be able to withstand temperatures up to 90 degrees centigrade. However, some other filters might have a lower resistivity so it is prudent to discuss your process temperature before you purchase a filter.
Chemical resistivity: In most cases, PP filters can be manufactured to show excellent chemical resistance. You can thus use these filters in various chemical processing applications. If you have a unique filtration need, you could even request your chosen manufacturer to offer you a custom solution. Typically, filters are manufactured for use with oils, detergent, chemicals, water, and other liquids.
Other factors: There are other miscellaneous factors such as the desired length and dimensions of the filter cartridge, the micron ratings, number of filtration layers and so on.
An important point to note about PP filters is that they are susceptible to oxidizing agents. However, they can be used with almost any other type of media. When purchasing a polypropylene filter, choose one that meets BETA 5000 ratings for a high performance quotient. This will also ensure a consistent nature of filtration.
