Glass is best packaging material in preserving taste, aroma, and nutritional values of the food. Glass is environment friendly and has tremendous growth opportunities in India, as India is one of the fastest growing economies in the world. The size of the glass industry in India is around $2.5 billion, out of which the container glass industry is around $0.87 billion. The major consumer industries for container glass are: liquor, beer, pharmaceuticals, soft drinks, food, and non-CSD segments. Export has a 10% share of the total container glass industry off take in India. The alcohol segment uses more than 60% of the container glass segment, followed by food and beverages industries. The size of the float glass segment is around $0.75 billion in India, and is growing as a result of growth in construction and automotive sectors. The float glass market of India has huge growth potential. It is seen that general awareness of using it as building material is slowly increasing in India.
MAIN TYPES OF GLASS
Today, flat glass comes in many highly specialized forms intended for different products and applications. Flat glass produced by way of the float process is often further processed to give it certain qualities or specificities. In this way, the industry can meet the various requirements and needs of the construction, automotive and solar energy industries • Annealed glass
• Toughened glass
• Laminated glass
• Coated glass
• Mirrored glass
• Patterned glass
• Extra clear glass
Annealed glass is the basic flat glass product that is the first result of the float process. It is common glass that tends to break into large, jagged shards. It is used in some end products and often in double-glazed windows. It is also the starting material used to produce more advanced products through further processing such as laminating, toughening, coating, etc.
Toughened glass is treated to be far more resistant to breakage than simple annealed glass and to break in a more predictable way when it does break, thus providing a major safety advantage in almost all of its applications.
Laminated glass is made of two or more layers of glass with one or more "interlayer" of polymeric material bonded between the glass layers. Laminated glass is produced using one of two methods:
1. Poly Vinyl Butyral (PVB) laminated glass is produced using heat and pressure to sandwich a thin layer of PVB between layers of glass. On occasion, other polymers such as Ethyl Vinyl Acetate (EVA) or Polyurethane (PU) are used. This is the most common method. 2. For special applications, Cast in Place (CIP) laminated glass is made by pouring a resin into the space between two sheets of glass that are held parallel and very close to each other.
Surface coatings can be applied to glass to modify its appearance and give it many of the advanced characteristics and functions available in today's flat glass products, such as low maintenance, special reflection/transmission/absorption properties, scratch resistance, corrosion resistance, etc.
Coatings are usually applied by controlled exposure of the glass surface to vapours, which bind to the glass forming a permanent coating. The coating process can be applied while the glass is still in the float line with the glass still warm, producing what is known as "hard-coated" glass.
To produce mirrored glass, a metal coating is applied to one side of the glass. The coating is generally made of silver, aluminum, gold or chrome. For simple mirrored glass, a fully reflective metal coating is applied and then...
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