A PLASTIC CAN BE BROUGHTLY DEFINED AS ANY NON METALLIC MATERIAL THAT CAN BE MOULDED TO DESIRED SHAPE. THE MOST COMMON DEFINITION OF PLASTIC IS THAT THEY ARE NATURAL OR SYNTHETIC RESINS , OR THEIR COMPOUNDS WHICH CAN BE MOULDED , EXTRUDED , CAST OR USED AS FILM OR COATINGS. MOST PLASTICS ARE OF ORGANIC NATURE COMPOSED OF H, O2 , C AND N .
PROPERTIES OF PLASTIC
- LIGHT IN WEIGHT
- A WIDE RANGE OF COLOURS
- LOW THERMAL CONDUCTIVITY
- RESISTANCE TO DETERIORATION BY MOISTURE
- LOW ELECTRICAL CONDUCTIVITY
- GOOD RESISTANCE OFFERED TO ATTACK BY INORGANIC ACIDS , BASES AND SALTS
- THEY ARE TRANSPARENT AND TRANSLUCENT
- PLASTICS IN MANY CASES ARE NON FLAME ABLE , SELF EXTINGUISHING AND BURN VERY SLOWLY
No comments:
Post a Comment