Solvents

Solvent filtration is influenced by many factors. Solvents are rarely mono-solvents and are much more likely to be in a mixture of solvents.

The same applies to filter media in that they are a blend of polymer and its internal additives.

So the polymer may be resistant but one of the additives is extracted, which causes an unstable polymer matrix, which means the filter media is not resistant.
Chemical compatibility tables are simply guidelines, relating in the main to solid plastics. You should always bear in mind the enormous contact surface that a filter media will have, due to its fine fiber structure (meltblown, spunbonded, membrane).
The temperature of the solvent will affect its impact. A temperature of 20°C or 60°C for the same solvent can cause entirely different results.
The contact time between the filter and the solvent is another factor. For example a contact time of 1 hours could be OK, whereas 2 days could damage the filter.
The complexity increases if you know that filter cartridges are made of different materials. For example: end caps in Polypropylene, outer cage in Polyester, membrane in PTFE, ...
Arranged has a range of filter cartridges that are made of one single materials; Polyamide (Nylon), Polyester, PVDF or HDPE. We have the expertise in the filtration of propanols, ketones, glycol ether, hexane, MEK, THF, NMP,…

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Video: Solvents

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