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Article | November 30, 2002
Bru's big on blue PET
Recognizing that an established brand lives or dies partly on the strength of its packaging, marketers at Bru S.A. were downright picky about which PET resin to use when they introduced 50-cL (16.9-oz) bottles of natural sparkling mineral water last May.
By selecting Aqua PET 20837 from the European division of Voridian (Kingsport TN) the firm’s “commitment to quality” is clearly communicated says Pierre De Winter supply chain director at the Lorce Belgium firm. “It’s a high-performance resin that enables our packaging to reflect the superior quality of the Bru-brand products.”
A variety of Bru-brand products in several PET bottle sizes are marketed by Bru S.A. and any number of resin grades are used. But for this particular bottle/product combination key considerations had to be factored in before making a resin selection. First the bottle is small so the low surface-to-volume ratio magnifies the potential for off-tastes due to acetaldehyde levels. Second the embossing on the sidewalls introduces structural challenges that are best addressed by specifying a resin having sufficient toughness. And finally the product itself a sparkling water requires a tougher PET resin than a noncarbonated still water. Only after all these factors were considered could a resin grade be selected.
The delicate blue tint is among the “elegant optical effects” says De Winter that he likes about the new bottle. He also likes that it’s clear and durable that its low acetaldehyde levels impart no off-flavors and that it offers an acceptable balance between cost and performance.
Just as important is its machineability says De Winter. Bru injection molds its own preforms on equipment from Husky (Bolton Ontario Canada) and blows the preforms on a Contiform 16 from Krones (Franklin WI). —PR
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