1
Feedstock assessment
Material basis
PET form → starting IV → moisture → contamination and preparation review
PET solid-state polycondensation
PET SSP Systems for Recycled Flakes and Pellets
Compare process routes, preparation requirements and published project configurations before selecting equipment for IV recovery.
Flakes, pellets or chipsBatch or continuous basisDefined test method
Selection principle: every proposal starts with the actual PET condition, measured starting IV, target IV, downstream use and acceptance method.
4published SSP project references
2 routesintegrated preparation or standalone drum examples
IV-basedconfiguration starts with measured material data
Project-specificcapacity, cycle and energy are not universal
Selection framework
Choose the process route before choosing the vessel
SSP is a downstream IV-upgrading stage. Washing, pelletizing and final conversion remain separate scopes.
Integrated preparation + SSPPre-crystallization and drying are defined before the SSP vessel when the material and production basis require them.
Standalone rotary SSPA standalone drum requires a suitable incoming condition and a documented material-preparation procedure.
Batch configurationDefine loading, residence time, changeover, heating and discharge around the approved recipe.
Continuous configurationDefine stable throughput, material flow, residence-time control and process atmosphere for the actual feedstock.
Engineering inputs
Six decisions that define a PET SSP project
These inputs establish whether the project needs upstream preparation, a standalone drum, or another configured route.
2
Crystallization and drying
When required
Pre-crystallize suitable PET and reduce moisture before the SSP reaction stage
3
Controlled heating
Thermal basis
Bring prepared PET to the approved solid-state process temperature without melting
4
SSP reaction
Managed atmosphere
Hold the material under the selected vacuum or nitrogen conditions for the defined residence time
5
Cooling and discharge
Material handling
Cool, discharge and transfer the treated PET under the approved handling procedure
6
Sampling and verification
Acceptance basis
Take representative samples and verify IV and other agreed parameters using the specified method
A standalone rotary drum and an integrated pre-crystallization-plus-SSP line are different project configurations. Neither route should be selected without confirming the starting material and target application.
Explore the SSP topic
Move from comparison to detailed engineering
The category page organizes the topic. Use the product page for equipment detail and the technical guide for process explanation.
PET SSP equipment page
- Six-step process overview
- Reference configurations with explicit boundaries
- Configuration FAQ and inquiry checklist
Rotary SSP technical guide
- Plain-language process explanation
- Batch and continuous route context
- Planning inputs before equipment selection
Published project evidence
Four real PET SSP installations
These photographs come from existing URIDGE project pages. Their values describe specific installations and are not universal guarantees.
Reference projects
Published project values, not a universal specification
The figures below describe two documented 2026 installations. A new project requires its own material assessment, recipe and acceptance basis.
Reference item
Documented configuration
Boundary
Bursa, Turkey22 m³ rotary drumIntegrated with an 800 kg/h pre-crystallization and drying system
Bursa batch basisApprox. 9–10 tPublished project loading; not a standard loading for every drum
Bursa targetIV 1.10 dL/gConfigured for the customer's recycled PET yarn application
Bursa cycleApprox. 32 h → 24 hReported for that project's feedstock, preparation and operating conditions
Rabigh, Saudi Arabia16 m³ rotary drumStandalone SSP configuration without the separate front-end system
Energy referenceApprox. 260 kWh/tPublished estimate under agreed project conditions, not a universal guarantee
Inputs needed for a proposal
- Representative PET sample and material history
- Starting IV and target IV with test method
- Moisture, crystallinity and contamination data
Acceptance items to define
- Sampling location and sample preparation
- Laboratory method and test frequency
- Operating window and reporting format
Claim and process boundaries
Separate IV recovery from final-product approval
The SSP stage is one part of a larger PET recycling and conversion chain. Its scope must be described precisely.
Preparation remains critical
Washing quality, contamination control, moisture, crystallinity and starting IV influence SSP stability and the achievable result.
IV is verified, not assumed
Target IV requires an agreed recipe and laboratory method. Reference-project values do not automatically apply to other materials.
Conversion is a separate scope
Preform, sheet, fiber, strapping and engineering applications have their own material and processing requirements.
Food-contact evidence boundarySSP equipment alone does not establish food-contact suitability. Any such determination depends on the complete recycling process, feedstock controls, decontamination evidence, migration or challenge testing where applicable, market-specific regulatory requirements and the responsibilities of the relevant project parties.
Published URIDGE pages
Equipment, preparation and project references
Every link below leads to an existing published page and retains its own technical boundary.
Primary equipment
PET SSP system
Detailed configuration, process and acceptance page.
Upstream preparationPET bottle washing line
Separate bottle-to-flake preparation stage.
Project reference22 m³ Bursa PET SSP system
Integrated preparation and rotary SSP installation.
Project reference16 m³ Rabigh PET SSP system
Standalone rotary-drum reference project.
Project referenceSurat PET recycling SSP system
Published Indian PET recycling installation.
Project referenceNew Delhi PET SSP project
Published recycled-PET upgrading installation.
Frequently asked questions
Route and selection questions
Confirm the material and test basis before committing to a vessel, capacity, cycle, energy figure or final IV.
What is a PET SSP system used for?
It is a downstream solid-state polycondensation stage used to recover or increase PET molecular weight and intrinsic viscosity under controlled thermal and process-atmosphere conditions.
Is SSP part of a bottle washing line?
No. Washing prepares recycled PET feedstock; SSP is a separate downstream IV-upgrading stage.
Should I choose batch or continuous SSP?
The choice depends on material consistency, production requirement, operating pattern, residence-time control, utilities and project economics.
Is pre-crystallization always required?
No. The requirement depends on PET condition and process route. Published URIDGE projects include both an integrated preparation system and a standalone drum example.
Are IV 1.10 and 260 kWh/t standard guarantees?
No. They are documented values from specific reference projects and must not be generalized to every feedstock or configuration.
Does SSP make recycled PET food-contact compliant?
Not by itself. Food-contact assessment requires evidence for the complete process chain, feedstock controls, validation testing, applicable regulations and responsible parties.
What should I send for a proposal?
Send representative PET information, starting and target IV with test method, moisture and crystallinity data, production requirement, downstream use, utilities and preferred acceptance procedure.
Start with your PET and target IV
Request a project-specific SSP configuration review
Send representative material information, starting and target IV, moisture data, expected production basis, downstream application, utilities and preferred acceptance method.