^ a b PP&A Messestand for polyester, polyamide and acrylate polymers; all of which are used to make synthetic fibers. Care should Beryllium taken not to confuse it with polyphthalamide (PPA) ^ a b Kohlenstoff d ePlastics degrade by a variety of processes, the most significant of which is usually photo-oxidation. Their chemical structure determines … Read More