Page 2 - LN
P. 2

PLASTICS:


              Plastic is a synthetic material which can be moulded into desired shape when soft and then

               hardened to produce a durable article.

              Plastic = Easy to Mould.


              The  starting  materials  for  plastics  are  obtained  from  petroleum  products  called
               ‘petrochemicals’.


              Some examples of plastics are: Polythene, Poly-Vinyl Chloride (PVC), Bakelite, Melamine
               and Teflon.

              Plastic is a polymer that can be recycled, coloured, reused, mould or drawn into wires or

               various other shapes.

              Units of some plastics have linear arrangement while some plastics are formed by the cross

               linked arrangement of their units.

              Thus, plastic is used in making toys, suitcase, bags, cabinets, brush, chairs, tables, and

               many other countless items.

              Polythene is one of the most famous types  of plastic, which is used in manufacturing of

               carry bags.






















        Types of Plastics:

              Thermoplastic:  Plastics  which  can  be  softened  repeatedly  and  can  be  easily  bent  or

               deformed into different shapes, on heating, are known as thermoplastic.

              PVC and Polythene are the examples of thermoplastics.


              Thermosetting plastic: Plastics which do not get deformed or softened on heating, when
               moulded once, are called thermosetting plastics.


              Bakelite and Melamine are the examples of thermosetting plastics.


                                                                                                                2
   1   2   3