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INTERESTING FACTS ABOUT PACKAGING CONTAINERS
Just wondering how this effects children and adults who purchase and drink these products? They are convenient to store on the shelf, pack in a lunchbox, carry on a trip. Is it inert?

SILICA COATING FOR JUICE CONTAINERS
The Boston Globe | April 4, 1988 | Copyright

A process used to coat computer microchips is helping to improve the taste of boxed fruit drinks, according to a reseacher at the Institute of Food and Agriculture Sciences at the University of Florida. University scientists said a silica coating on the inside of soft-pack juice containers can reduce flavor loss that the packaging causes.

"We discovered the flavor of a juice is readily absorbed by current polymeric packaging materials.

PET silica coating process extends shelf life for Coca-Cola.
http://www.allbusiness.com/plastics-rubber/plastics-product-manufac...

Blow Molding Close-Up | Prospects Brighten for PET Beer Bottles


High Hopes for Beer Bottles
Enliven Packaging Conferences
Three hundred billion beer bottles a year worldwide is a mighty tempting target for the plastics industry. So it’s no surprise that 13 of 24 papers focused on beer packaging at the recent Nova-Pack Europe ’99 Conference, held in Germany by Schotland Business Research, Skillman, N.J. Among the highlights were the first published comparison of manufacturing costs for multi-layer and barrier-coated PET beer bottles, an update on nanocomposite barrier materials, and a report on “super-heat-set” PET bottles.

More new developments for beer bottles will be presented at Schotland’s Nova-Pack Americas 2000 conference in Orlando, Fla., at the end of this month. The meeting will hear about two new plasma-coating technologies for PET bottles and a preform overmolding process.

New barriers & coatings
Brewers generally say they need a bottle that provides shelf life of over 120 days with less than 15% loss of CO2 and admittance of no more than 1 ppm of oxygen. Internal or external coatings, and three- or five-layer PET structures using barrier materials are being evaluated to reach that performance.

The upcoming Nova-Pack Americas conference will hear about a “glass” barrier-coating method and an “injection overlay” technology, both developed by Tetra Pak Plastic Packaging Div. in Geneva, Switzerland, whose U.S. office is in Schaumburg, Ill. Bottles made with both techniques are said to be fully recyclable, although full-scale tests are still under way. Commercial release of the technologies will begin in this first quarter.

The first process, called Glaskin, coats the inner surface of a PET bottle with a very thin, clear layer of silicon oxide using a vacuum-deposition process. The “glass” coating reportedly can be applied at rates from 6000 to 18,000 bottles/hr. It is designed for beer, juice, and carbonated soft drinks. The coating is said to extend the shelf life of a PET bottle from four to 12 months. The silica barrier reportedly also provides excellent flavor retention.

PET BOTTLES | Diamond-like carbon films for PET bottles and medical applications


The unique properties of diamond like carbon (DLC) film, including its chemical inertness and impermeability, make it possible for new applications in food, beverage and medical market segments. Although these fields involve relatively higher risk for customers, the expected great advantages of DLC films have driven extensive efforts. In this paper, we present our recent results of development in high gas barrier polyethylene terephtalate (PET) bottles for beverage use. We also demonstrate that DLC or fluorinated DLC is a promising candidate coating material for orthopedics implants and blood contacting devices, such as artificial joints, cardiovascular interventional devices, artificial organs and pacemakers.

A unique technique of plasma CVD method has been applied to deposit DLC films on the inside surface of PET bottles. The DLC-coated PET bottle exhibits extremely high gas barrier properties against oxygen, carbon dioxide and flavors compared to conventional bottles. For the practical use of PET bottles as a commodity, high speed and low cost coating are essential and lately our newly developed high speed coating machine has been successfully operated for the large production of hot tea drink bottles.

Keywords: Diamond-like carbon; Gas barrier; PET bottles; Medical applications

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Replies to This Discussion

It looks good to me Debby.
Glass is extremely inert, far less reactive than say aluminium or plastic coatings.
Flavour retention is an aspect of its inert surface.

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