Overcoming Intrinsic Viscosity Loss in High-Performance rPET

One of the persistent engineering hurdles in closing the loop on PET bottles is the thermal and hydrolytic degradation that occurs during mechanical reprocessing. In this technical deep-dive, we examine the reaction kinetics of solid-state polycondensation (SSP) and how precise vacuum degassing preserves IV levels above 0.80 dL/g for high-speed stretch blow molding.

Key Technical Findings

Through closed-loop vacuum decontamination and molecular chain rebuilding, rPET can match the mechanical rigidity, crystal haze tolerance, and stress-crack resistance of virgin resin.