1
Feedstock assessment
Material basis
PET form → starting IV → moisture → contamination and preparation review
PET Recycling SSP System
PET SSP System for Intrinsic Viscosity Recovery
Configure solid-state polycondensation equipment around the incoming PET form, starting and target IV, moisture condition, process atmosphere, batch requirement, utilities and agreed acceptance testing.
- Material-specific process basis
- Project-defined IV target
- Documented acceptance method
PETflakes, pellets or chips assessed by project
Batch / continuousroute selected for the operating basis
IV targetdefined with the downstream application
Test basisagreed sampling and laboratory method
Project-specific configuration
Define the PET condition before defining the SSP equipment
SSP performance begins with the actual feedstock. The system and recipe should follow verified material data rather than a generic capacity or IV promise.
Incoming PETFlake, pellet or chip form; source; contamination; crystallinity and bulk density.
Starting and target IVLaboratory method, starting range, required target and downstream conversion route.
Moisture and preparationIncoming moisture, drying requirement and whether pre-crystallization is needed.
Production basisBatch loading or continuous throughput, operating hours and changeover requirements.
Utilities and acceptanceHeat source, vacuum or nitrogen basis, electrical supply, sampling points and acceptance limits.
Configurable process route
Six engineering decisions from material review to IV verification
This sequence explains the process logic. Final equipment quantities and residence time follow the approved project process and operating recipe.
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.
Published project photography
Real PET SSP installations
These photographs come from existing URIDGE project pages. Captions identify the published installation context and do not turn reference-project values into general 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
Related PET recycling equipment and projects
These links lead only to existing published pages. Each page retains its own scope and evidence boundary.
Product category
PET recycling SSP systems
Current URIDGE SSP category page.
Upstream equipmentPET bottle washing line
Separate bottle-to-flake preparation stage.
Related categoryPlastic pelletizing equipment
Published pelletizing category and equipment routes.
Project reference22 m³ Bursa PET SSP system
Integrated 2026 yarn-grade reference project.
Project reference16 m³ Rabigh PET SSP system
Standalone 2026 rotary-drum reference project.
Project referenceSurat PET recycling SSP system
Published Indian project page.
Frequently asked questions
Configuration and acceptance questions
Confirm the material and test basis before committing to capacity, residence time, energy or final IV.
What information is needed before configuring a PET SSP system?
Provide the PET form and source, starting IV, target IV, IV test method, moisture, crystallinity, contamination data, batch or throughput requirement, downstream use, utilities and proposed acceptance method.
Can one SSP system process both flakes and pellets?
Some projects can be engineered for suitable PET flakes, pellets or chips, but material handling, preparation and the operating recipe must be confirmed for the actual feedstock.
Is pre-crystallization always required?
No. It depends on the PET condition, process route and project objectives. The published Bursa system includes a separate pre-crystallization and drying stage, while the Rabigh reference uses a standalone rotary drum configuration.
Can the system always reach IV 1.10 dL/g?
No universal value should be promised. IV 1.10 dL/g is the documented target of the Bursa yarn project. A new target depends on starting material, moisture, recipe, residence time and the agreed test method.
Is 260 kWh/t guaranteed?
No. Approximately 260 kWh/t is a published reference estimate under specific project conditions. Actual energy depends on starting and target IV, preparation, loading, utilities, insulation and operating recipe.
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.
How should final IV be accepted?
Agree the sampling point, sample preparation, laboratory method, frequency, limits, operating conditions and reporting format before contractual acceptance.
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.