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Membrane Filtration 101: Membrane Substrates

There are many factors to consider when choosing and working with a membrane filter. Some membranes might be built with substrate material. Knowing the difference between these membrane filters and ones built without substrate material is important for you and your team’s work. 

What is a Membrane Substrate? 

A membrane substrate is a layer on a filter that improves durability and ease-of-use. They are a great tool for more delicate membrane filters. 

How Do I Know if my Membrane has a Substrate Layer?

It may be difficult to locate the inlet side of the membrane filter, especially when a membrane filter has a substrate layer. But how do you determine if a membrane has a substrate layer? You can always contact the manufacturer to be sure but the substrate layer will have a different texture and appearance. A substrate layer on a membrane filter should be more ridged and have a coarser texture. In a membrane with a substrate layer the inlet would be on the membrane side and the outlet would be on the substrate side. 

What is a Substrate Layer Made of?

A substrate layer on a membrane filter normally would be made of polypropylene. Polypropylene is a thermoplastic polymer. This material creates a durable layer to protect the membrane filter. Polypropylene substrate is a great choice for more delicate membrane filters. 

How Do I Find These Filters with Substrate Layers?

Here at Tisch Scientific we have a wide variety of tools and membrane filters for every application. 

Our helpful media selector and chemical compatibility guide can help guide you or you can reach out to one of our friendly customer service team

We also offer a wide variety of membrane filters and membrane roll stock that can be cut to your exact measurements. If you do need a polypropylene substrate layer for your membrane filter we can provide that as well.

No matter your application we are here to help you find the exact tools for the job.

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