I created this Topic yesterday SN. It might be worth watching. Dr. Chen is a well-established expert in the field and gives presentations around the world. He relies on the Guidelines created by the HerniaSurge/Collaboration/EHS, which are pretty vague, only using the words mesh and pore size to describe the prosthetic material.
Unfortunately I think that you will find that the mesh makers all have good things to say about their products but the surgeons do not really know which mesh is best.
Specific to your question, polypropylene mesh is used for both lap and Lichtenstein. But so are many other types. There is no single material tied to any procedure.
Youtube video about the Lichtenstein repair by Dr. David Chen