Polyvinyl chloride (PVC) is the dominant member, the family of vinyl comprises a number of resins based on the vinyl radical or vinylidene radical, PVC can be made in different form to permit processing on a wide variety of equipment, each form can be altered further by compounding to achieve particular properties in end products which from soft to rigid in nature.

PVC-resin is made with suspen-iltion polymerization. It is one of the most widely used to manufacture plastic. PVC is shock resistant so can be used to make hard PVC products. It can offer good solubility, good electrical insulation, thermo-plasticity and membrane forming capability. It can offer good chemical stability, resist corrosion and water. Around the world, over 50% of PVC manufactured is used in construction.