Emhart Glass and Vetropack: a milestone for stronger and lighter-weight glass containers

2012-08-06 | Machinery developments

Resistance to breakage and reduced weight – these are the characteristics usually requested for glass packaging. These two features will now be possible thanks to a new process developed by Emhart Glass, which will be installed at Vetropack’s glassworks in Austria, and subsequently used in an industrial production process for the first time.

Emhart Glass has invested heavily in developing new technology for manufacturing tempered packaging glass
Technology for tempering glass containers
Emhart Glass, a division of Bucher Industries, has invested heavily in developing new technology for manufacturing tempered packaging glass. The process will be commercialized under industrial production conditions in collaboration with Vetropack. This tempering process represents a milestone for stronger and lighter-weight glass containers.
For more than 80 years, flat glass has been tempered for use as safety glass. Emhart Glass is the world’s first producer of glass container manufacturing equipment to have succeeded in giving packaging glass the exact same properties of tempered flat glass. The new, patented tempered glass technology was developed on the in-house glass production line, dedicated exclusively to research and development, at the Emhart Glass Research Centre in the United States. The revolutionary process allows either a significant increase in resistance to breakage or a reduction in the weight of packaging glass. In practice, both these properties will be combined as required. The process is predestined to significantly reduce the weight of returnable bottles, while maintaining the same filling capacity. When tested by dropping onto a hard surface from a height of 1.5 metres, only very few filled bottles break, while conventional ones generally shatter. Tempered glass containers can be recycled like normal packaging glass.

The innovative tempering process
Implemented downstream of the glass forming machine, the i...




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Article taken from Glass Machinery Plants & Accessories bi-monthly magazine (6 issues per year)
Year: 2012 number: 2
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