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Friday, October 07, 2005

Oxygen Scavenging PET Bottles and Jars

With advent of an improved oxygen-scavenging barrier that is undergoing testing right now, PET will now be able to take and even larger sector of ridged packaging from bottles and jars.

PET is by far one of the fastest growing segments of the beverage bottling industry, but has also made huge inroads in the cosmetic and personal care and food industry. Much of its rapid acceptable into the market is due to the fact that PET bottles and jars are not only shatterproof and recyclable now (see PET recycling increases for 2004 on Packaging Blog), they are as cosmetically appealing as glass - without the weight.

One of the key negative attributes of PET Bottles and other PET packaging containers is that fact that PET does a poor job in keeping oxygen from permeating the container and reacting with whatever is inside. Oxygen reacting with the fill of a container can affect the flavor of foods and drinks, the color and fragrance of a fill and it can dramatically affect the shelf life of some products as well.

Constar International has worked hard to beat this problem and is now on its third solution DiamondClear which when blended with monolayer PET, binds oxygen and stops the negative effects of oxygen on the fill.

The 2 prior methods Constar International had to correct this problem had their own issues: Oxbar is a multi-layer oxygen scavenger but required beverage makers to invest in multilayer injection equipment, and MonOxbar, which is a monolayer barrier material which cost less than Oxbar but was not accepted well due to the pearlescence and haze, which dramatically reduced its attraction on the shelf.

Expect to see far more products packed in PE packaging such as teas, sauces, creams and more due to this exceptional new advance in PET plastics.

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  • At 8:30 AM, Blogger John said…

    To all:

    Interesting article on Oxygen Scavenging. Another material, Polyethylene Naphthalate (PEN) has according the information of the producer, an Oxygen permeation rate 5 times less than PET (source). Maybe the scavenger Oxbar does even better than that?

    Either way, interesting topic!
    Keep up the good work,



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