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Solid state polycondensation (SSP) technology for PET.

The main applications of high-viscosity PET are food-grade packaging and technical yarns. Applications include containers for various beverages, tire cords, conveyor and safety belts, air bags, etc.

Pellets of finished PET material are introduced directly into preform or spinning machines. The uniqueness of Buhler’s SSP technology enables the same production plant to be used for PET for different applications regardless of the feed material formulation (co-polymers or homo-polymers).

Solid state polycondensation is the most reliable technology for PET manufacturing, having withstood the test of time. Buhler's SSP technology has proven its excellent performance in conjunction with all major CP technologies. The resin producers using this technology have won the approval of world brand owners.

Key Features

Product quality
  • High product uniformity due to narrow residence time distribution in process equipment.
  • Excellent polymer color.

Process Description

Before the raw material can be thermally processed, it must be crystallized and annealed, which allows the necessary polymer molecular structure to form during thermal treatment in the reactor.