From the Archives : In this 2017 story a brief history of the use of polypropylene resin material used for hernia and transvaginal mesh. This information was known by manufacturers who purchased resin that was accompanied by the Material Safety Data Sheet that warns against medical application of polypropylene material.
https://www.meshmedicaldevicenewsdesk.com/articles/mesh-polypropylene-resin-not-meant-human-implants