2024-09-11
Why plastics producers need to pay more attention to additives
Plastic additives are chemicals that are added to base polymers, like polyethylene (PE), polypropylene (PP) and polyethylene terephthalate (PET), to make them function in specific applications. Additives include plasticizers that make polymers more flexible, stabilizers and antioxidants that prevent degradation by light, heat, or oxygen in the air, as well as colorants. Many groups of plastic additives have been shown to be toxic, including specific phthalate plasticizers, brominated flame retardants (BFRs), UV stabilizers, bisphenols and per- and poly-fluoroalkyl substances (PFASs). The hazards posed by such additives vary. For example: some impact endocrine (hormone) systems, where they can impact metabolism, reproduction and growth; others are persistent, bioaccumulative and toxic; and some are toxic to marine environments.