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Plastics are the general term for a wide range of
synthetic or semi synthetic polymerization
products. They are composed of organic
condensation or addition polymers and may contain other substances to
improve performance or reduce costs. Carton is the name of certain types of containers
typically made from paperboard which is also
sometimes known as "cardboard". Many types of cartons are used in packaging. Sometimes a carton is also called a box. Moisture vapour transmission rate(MVTR)( also water vapour transmission rate(WVTR) MVTR is a measure of the passage of water vapour through a substance.There are manyindustries where this property is critical. Moisture sensitive foods and pharmaceuticals
are put in packaging with controlled MVTR to achieve
the required quality, safety,
and shelf life.
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