Solid State Polymerization Plants for Sale

Solid State Polymerization (SSP) is a process in which the polymer chain lengths are increased by heat in the absence of oxygen and water, by means of either vacuum or purging with an inert gas to drive off the by-products of reactions. The reaction is driven by temperature, pressure, and the diffusion of by-products from the interior of the pellet to the surface. SSP is an important step frequently used after melt-polymerization for the purpose of enhancing the mechanical and rheological properties of polymers before injection blow molding or extruding. The SSP technique is widely applied in industrial manufacture of bottle-grade PET, films, and superior industrial fibers.