WEB EXCLUSIVE: Two new masterbatches from Clariant Additive Masterbatches, Winchester, Va., offer long-lasting barrier to oxygen and carbon dioxide in PET bottles. Trade named CESA-absorb, they contain a combination of ingredients that remains stable during handling and processing and avoids the need for a nitrogen blanket, which is often required when using other oxygen absorbers.
CESA-absorb OCA0050134-ZN is an all-in-one masterbatch that includes a nylon polymer that forms a passive barrier to to the escape of CO2 from bottles containing carbonated soft drinks and beer. Active ingredients in the formulation initiate oxidation of the nylon so that it absorbs oxygen and protects sensitive contents of the bottle.
CESA-absorb NTA0050139-ZN does not contain nylon in the masterbatch, allowing processors to control loading by adding the PA separately.
The delayed nylon oxidation reaction does not start until three to four weeks after processing and it develops over the next one to two weeks. Thus there is no need to keep the masterbatch in sealed containers or to use equipment that surrounds (“blankets”) the molded preforms and bottles with nitrogen gas. CESA-absorb is said to cause very little loss of clarity in colored bottles.
(800) 891-3922 • clariantmasterbatches.com
382 Arbor Court Winchester, VA 22602
Phone (540) 665-1865 Fax (549) 665-2917