PKSC 1020 Lecture Notes - Lecture 6: Mason Jar, Sodium Hydroxide, Sodium Carbonate

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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
Glass - Raw materials, percentages
70-75% Sand
12-15% Soda ash
8-10% Limestone
5% Other
Glass – Raw materials, purpose of each
sand- main structural component
soda ash- reduces melting temperature
limestone- improves hardness
cullet- ~20% of total composition broken, recycled glass also reduces melting
temperature
Minor ingredients
Alumina – increased hardness
Magnesium oxide – chemical durability
Coloring agents reduces spectrum of light allowed through
- amber
- green
- Flint clear glass
Typical Glass Plant Layout - Covington Plant
Bottle Manufacturing Steps
1. Unloading
2. Storage
3. Weighing
1
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