Glass.HOF'99 - Packaging Materials Glass PKGSC 102 Glass...

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Packaging Materials - Glass PKGSC 102 Glass One of oldest packaging materials (3000B.C.) Non-crystalline (as used in packaging) Considered a very viscous liquid - Conveys a quality image that other materials do not - It is inert, does not interact with the product - (perfume will sometimes melt plastic) - glass is viscous Glass - Raw materials, percentages 70-75% Sand 12-15% Soda ash 8-10% Limestone 5% Other -most energy intensive process Glass – Raw materials, purpose of each sand- main structural component soda ash- reduces melting temp limestone- improves hardness cullet- 20% of total composition broken, recycled glass, also reduces melting temp. Minor ingredients Alumina – increased hardness Magnesium oxide – chemical durability Coloring agents - amber - green - Flint glass- has no colorings Typical Glass Plant Layout - Covington Plant - Batch house- where raw materials are stored - Furnace/forming- make wide mouth or narrow necked jars 1
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