PVC (Polyvinyl Chloride) falls in the category of plastic material. These are basically synthetic polymerisation products of long chain carbon based organic molecules. These are very useful materials in many industries and can be reused by melting again and again as they become solid on cooling. However the quality of PVC will degrade with each melting cycle. PVC has innumerable uses in toys, shoe soles, car parts, healthcare accessories, construction industry, cable coating, shutters and frames etc etc.
Depending upon for what use the PVC granules are required certain additives are mixed in it while the manufacturing process. Some of the common additives are in the nature of plasticiser and antioxidants. There are many other additives for specific uses. Now a days god quality machines are available for making PVC granules from the basic raw materials like ethylene and chlorine. In fact to make the process economical chlorine is extracted from the salt water by electrolysis.
Different companies have different formula and ingredients for making a particular type of PVC. In this matter I will suggest to visit the suppliers sites (like Alibaba or others) who are supplying these machines for making PVC. They will provide the basic knowhow with these machines. Basically by combining ethylene with chlorine we get ethylene dichloride which is the converted at high temperature to vinyl chloride monomer. These monomer molecules are polymerised by fusing together and that gives rise to polyvinyl chloride resin which is finally converted to granules with a specific mechanical machine.
If you are interested in the manufacturing of PVC granules then it will be advisable to learn and experience hands on knowledge by working in a small plant for some time or seeing the process there. There are many small businesses which can allow you to see the process yourself. These things do not materialise on theoretical levels. One has to see the process oneself to get a feel of things and then use that experience in ones project.
Knowledge is power.