PMID 28776036. ^ Virtually all polyurethanes are thermosets, on the other hand some thermoplastics can also be produced, As an illustration spandex ^ PP&A stand for polyester, polyamide and acrylate polymers; all of that are used to make artificial fibers. Care needs to be taken not to confuse it with https://plasticprotectivevents35702.creacionblog.com/36249487/about-plastic-protective-vents