Hydrophilic and hydrophobic filter

Hydrophilic and hydrophobic filter have same pore size 0.22 microne.why water passes through hydrophilic filter but not through hydrophobic.what is phenomenon behind it?

Hydrophilic filter is made up of PVDF.which has low surface tension for water.hydrophobic filter is made up of PTFE which has high surface tension for water so water does not cross from pores easily.

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What is PVDF and PTFE

Poly vinyl di fluoride and poly tetra fluro ethylene.

Many thanks