POLYVINYL CHLORIDE

WHAT IS POLYVINYL CHLORIDE Abbreviated as PVC The third-most widely produced plastic Thermoplastic Pure polyvinyl chloride is white, brittle solid

HISTORY First discovered in 1835 by French chemist, Henri Victor Regnault Then in 1872 by German chemist, Eugen Baumann

CHEMICAL THINGS PVC is a polymer which is made from monomers called vinyl chloride. It is formed by the kind of polymerisation called “Addition” Its IUPAC name is called poly(1-chloroethene)

POLYMERISATION H H H H H H C C C C C C H Cl H Cl H Cl

CHEMICAL THINGS

Resistivity / Insulation PROPERTIES Properties Melting Point 100 – 260 °C Resistivity / Insulation Good

MANUFACTURING PROCESS Extrusion The shaft (which is called "Screw") in the cylinder is rotated to push resin forward Resin is melt by heat and kneaded While it is pushed forward, and then extruded from the outlet dies.

MANUFACTURING PROCESS Thermal Sheet or film manufactured by the calendaring technology or the extrusion technology is heated to soften. Air in the metal mold is sucked out to press the melt material at an ambient pressure This is called "Vacuum Molding", which is used for the production of thin packaging material such as the egg package

MANUFACTURING PROCESS Injection This is a technology to inject melt resin into the metal mold by pressure best suitable for production of PVC goods with three-dimensional structure such as sealed containers

USES Pipes

USES Electrical Cables

USES Credit Card