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Package design > Structural
Films > Lidding / sealing films
Materials Product Brief
Package Type > Thermoformed packaging
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April 30, 2001
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Send to KindleWPO lauds 'Dream Steam'
The “best-of-show” President’s Award in the WorldStar 2000 packaging competition, sponsored by the World Packaging Organisation, went to a concept known as “Dream Steam.” Developed by flexible film converter Wipf AG (Volketswil, Switzerland) and food R&D company Creative New Food (Eglisau, Switzerland), Dream Steam is a three-component package that makes it possible to combine fresh vegetables and a fresh protein—meat, fish, or poultry—in one cook-in container.
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Refrigerated shelf life is six days and the food can be cooked in the microwave oven in under six minutes. The tray portion of the package is thermoformed polypropylene. The clear film lidstock is considered proprietary. Attached to the lidding material is a unique one-way valve that performs two critical functions. First when internal gas builds up as the fresh produce respires the valve permits that gas to be released at a carefully controlled rate. Otherwise a six-day shelf life would not be possible as the package would burst. The other critical function performed by the valve is what it does in the microwave oven. The whole idea behind the Dream Steam concept is that as food products in the package are heated by the microwaves moisture content in the products generates steam that cooks the food. But if the one-way valve didnt release internal pressure at a
controlled rate the package would burst and controlled heating of any kind would be out of the question. First to commercialize this new technology was the Swiss supermarket chain Migros which has sold its Voilà line in the Dream Steam package for about one year now. Consumers pay the U.S. equivalent of about $3.50 for approximately 12 oz of food.
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