PMID 28776036. ^ The majority of polyurethanes are thermosets, nevertheless some thermoplastics can also be made, For illustration spandex ^ PP&A stand for polyester, polyamide and acrylate polymers; all of that are accustomed to make synthetic fibers. Care needs to be taken never to confuse it with polyphthalamide (PPA) ^ https://eptfe-membrane82468.blogofchange.com/37171501/helping-the-others-realize-the-advantages-of-outdoor-electronics-vents