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Plastics are also called synthetic resins and are broadly classified into two categories; thermosetting resins and thermoplastic resins.

Raw Material(Monomers) Synthetic Resin (Polymers)
Thermoplastic Resin Vinyl chloride monomer(VCM) Polyvinyl chloride (PVC)
Ethylene Polyethylene (PE)
Propylene Polypropylene (PP)
Styrene monomer Polystyrene (PC)
Acrylonitrile/Bytadiene/Stryrene Acrylonitrile-Butadiene-Styrene Resin (ABS)
Bisphenol A/Carbonyl chloride Polycarbonate (PC)
Hexamethylenediamine/Adipic acid Polyamid resin (PA:Nylon)
Methyl methacrylic acid Methacrylic resin
Ethylene/Terephthalic acid Polyethlene terephthalate (PET)
Phenol/Formaldehyde Phenol resin
Thermosetting Resin Melamine/Formalin Melamine resin
Ca[rolactam.Hexamethylenediamine Polyamide resin (PA:Nylon)
Trienedisocyanate/Propylene glycol Polyurethane (PU:Urethane resin)
Bisphenol A.Epichlorohydrin Epoxy resin
Dimethylsiloxane Silicone resin (SI)
Maleic anhydride/Styrene monomer Unsaturated poluester resin (FRP)

The thermosetting resins include phenolic resin and melamine resin, which are thermally hardened and never become soft again. Thermoplastic resins include PVC, polyethylene (PE), polystyrene (PS) and polypropylene (PP), which can be re-softened by heating.
Usually, thermoplastics are supplied in the form of pelletised material (compounds) with additives (antioxidants, etc.) already blended in it. However, PVC resin is often supplied in powder form and long term storage is possible since the material is resistant to oxidation and degradation. Various additives and pigments are added to PVC during the processing stage, and the blend is then converted into PVC products.
PVC is sometimes known as ?Vinyl? in Europe and predominantly so in North America. In Europe, ?Vinyl? usually refers to certain specific flexible applications, such as flooring, decorative sheets and artificial leather.

PVC is a thermoplastic made of 57% chlorine (derived from industrial grade salt) and 43% carbon (derived predominantly from oil / gas via ethylene). It is less dependent than other polymers on crude oil or natural gas, which are nonrenewable, and hence can be regarded as a natural resource saving plastic, in contrast to plastics such as PE, PP, PET and PS, which are totally dependent on oil or gas. This chlorine gives to PVC excellent fire resistance: when PVC is set on fire, the flames go out as the fire source is removed due to the material?s self-extinguishing properties.


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