New ultraviolet protection additive masterbatches are said to give polyethylene terephthalate (PET) packaging the clarity that is desired without adding the yellow tinge common with these additives. According to the supplier, Ampacet (Tarrytown, NY), its CrystalClear PET UV additive masterbatch is 75% more effective than standard UV additives for PET and brings with it greater packaging clarity.
Unlike standard PET UV technology, which sometimes imparts a yellowish tint to the package, the CrystalClear product helps processors realize clear packaging with UV protection up to 380 nm. Ampacet says the product’s greater efficiency can lead to savings since less than half the normal amount of UV additive is required. For a standard bottle application, a loading ratio of 0.5-1% is recommended, dependent on bottle thickness. Also according to Ampacet, CrystalClear is less volatile and more soluble than standard additives, and it won’t contribute to plate-out during molding. —[email protected]