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Aseptic PET is Henniez's cup of tea

A leader in the bottled water business in Switzerland, Henniez is making a bold move into in-line blowing and aseptic filling of plastic bottles for iced teas.

The automatic shrink bundler produces multipacks in unsupported film or in overwrapped trays
The automatic shrink bundler produces multipacks in unsupported film or in overwrapped trays

As a distributor for Lipton iced tea from 1993 to 1998, the Swiss bottled water giant Henniez S.A. helped Switzerland achieve the highest per capita iced tea consumption rate in the entire world.

Along the way, Henniez, named for the small village in which it is headquartered, realized that if iced tea was so popular in Switzerland, it should be more profitable to bottle it, rather than simply distributing it. Henniez planned to convince Lipton to extend its contract to bottling the tea, along with distributing it.

The company also decided that its iced tea should not be subjected to pasteurization because it felt the prolonged exposure to heat would damage taste. The Lipton product distributed by Henniez had been cold-filled into a returnable bottle of polyethylene terephthalate and pasteurized to make it shelf stable.

Hot-filled PET was never an option, either, says director of technology and production Pascal Rouge. "Margins on tea are small, so you have to be very competitive," he says. "Hot-fill PET bottles, which must be relatively heavy to withstand the heat, are just too expensive."

Ambient filling of PET on an aseptic filler, on the other hand, permits a bottle to be as light as a carbonated soft-drink bottle. It also minimizes the length of time during which product is exposed to heat, which means flavor can be maintained at its peak. So Rouge and colleagues decided early on that aseptic packaging was the way to go.

But which aseptic system? Minimal space was available, which didn't bode well because many of the aseptic PET filling systems available then and now require considerable square footage. They also involve, says Rouge, a level of complexity that Henniez wanted to avoid. The complexity Rouge refers to is the "clean room" quality that is a prerequisite to some of today's commercially available aseptic filling systems. Class 100 or 1ꯠ sterility, large areas that must be overpressured, employees who must wear clean gowns and sanitize themselves each time they enter the filling area--these were all the options that Henniez management hoped to avoid, says Rouge.

'Not that easy'

"It's not that easy to say, okay, let's build an aseptic room and put a filler in it," says Rouge. "We weren't used to working that way, not only at the management level but also the people who work with the machines. In addition, the investment would have been much higher for an aseptic-room approach."

So Henniez formed a relationship with Tetra Pak Plastic Ltd. (Geneva, Switzerland), just then developing a linear aseptic bottle filler whose most distinguishing feature is its small footprint. Measuring 8x3 m (26'x10'), the machine is capable of running 11/2-L bottles at 83/min. Fed by a tubular heat exchanger for the thermal processing of the tea and an in-line blow molder, the integrated line provides blowing, sterilizing, filling, capping, labeling, multipacking and palletizing.

Included in the line is one of Tetra Pak's first X-6 stretch blow-molding machines. The Tetra Plast(TM) LFA-8 filler is also among the first of its kind. It has a built-in sterile chamber that eliminates the need to locate the line in a costly and complicated clean-room environment. So the filler sits on the plant floor like any other piece of equipment.

Sterility is no less important than in any other aseptic filling operation. But, says Rouge, the Tetra Pak system delivers it in a clever way that requires no clean rooms or pharmaceutical-style garb. It lets a beverage plant be a beverage plant, he says.

By 1997, Henniez committed itself to Tetra Pak's aseptic filling concept and contracted with Tetra for a system ready for commercial production in early '99. But a funny thing happened on the way to commercialization. Also in 1997, Henniez's contract with Lipton was terminated. Fortunately, another Henniez contract, for Virgin Cola in PET bottles, was signed in April '98. This relationship with England-based Virgin paved the way for Henniez to seek Virgin's permission for Henniez to market iced tea under the high-flying Virgin brand. In return Henniez pays a royalty to Virgin. Thus, Virgin Iced Tea in 1/2- and 11/2-L aseptically filled PET bottles was launched last January.

The Virgin connection was important because it gave Henniez a brand that was already a well- known entity. Advertising and promoting such a brand can be done effectively at far less cost than it would take to create and promote an entirely new brand.

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