Processability and mouldability: The processability of a thermoplastic material depends largely on its melt viscosity. PVC is not suitable for injection moulding of large sized products, since its melt viscosity is comparatively high. On the other hand, the viscoelastic behaviour of molten PVC is less dependent on temperature and is stable. Therefore PVC is suitable for complex shaped extrusion profiling (e.g., housing materials), as well as calendaring of wide films and sheets (e.g., agricultural films and PVC leather).
The exterior surfaces of PVC products are excellent, and display superior embossing performance - enabling a wide variety of surface treatments with textures ranging from enamel gloss to the completely de-lustred suede. Since PVC is an amorphous plastic with no phase transition, moulded PVC products have high dimensional accuracy. PVC also exhibits excellent secondary processability in bending fabrication, welding, high-frequency bonding, and vacuum forming, as well as on-site workability.
Paste resin processing such as slush moulding, screen printing and coating are a convenient processing techniques that are feasible only with PVC.
These processing methods are used in flooring, wall covering, automobile sealants and undercoating.