| What
is vinyl and where does it come from?
Vinyl is essentially derived from two simple
ingredients: fossil fuel and salt. Petroleum or natural gas is
processed to make ethylene, and salt is subjected to electrolysis
to separate out the natural element chlorine. Ethylene and chlorine
are combined to produce ethylene dichloride (EDC), which is further
processed into a gas called vinyl chloride monomer (VCM). In the
next step, known as polymerization, the VCM molecule forms chains,
converting the gas into a fine, white powder vinyl resin
which becomes the basis for the final process, compounding.
In compounding, vinyl resin may be blended with additives such
as plasticizers for flexibility, stabilizers for durability and
pigments for color. Through various plastics processing operations,
manufacturers are able to offer versatile products with customized
performance characteristics.
Because less than half of the vinyl polymer
is from petroleum feedstocks, and 99 percent of all vinyl produced
ends up in a finished product due to manufacturing efficiencies
across multiple business segments, it is one of the most energy-efficient
plastics.1
1 "Post-Consumer and Post-Industrial Vinyl
Reclaim: Material Flow and Uses in North America," Principia
Partners, July 1999. |