Name: Twin PET
Brand: Bandera

General Features

Bandera Twin PET® – High-Capacity PET Recycling Extruder

High Capacity and Low IV Loss in PET Recycling

Bandera Twin PET® is a high-capacity PET recycling extruder developed to convert post-consumer (PCR) and post-industrial (PIR) PET waste into high-quality recycled pellets.

The core of the system is a co-rotating twin-screw extruder with a 52D length-to-diameter ratio, based on Bandera's patented HVTSE® (Highly Vented Twin Screw Extruder) technology.

HVTSE® technology uses high-vacuum degassing capacity to provide more controlled thermal and mechanical processing of PET while helping preserve the polymer chains.

Dryerless PET Recycling Technology

One of the key features of Twin PET® is its ability to process PET flakes without requiring pre-treatment processes such as pre-drying or densification.

The low filling level inside the extrusion chamber and the high degassing capacity of HVTSE® expose a larger surface area of the material to the vacuum effect.

This configuration provides an advantage for the effective removal of moisture and volatile components during the PET recycling process.

Process Without Pre-Drying or Densification

Process without pre-drying of PET flakes
Operation without densification pre-treatment
High-vacuum degassing
Low extrusion pressure
Low shear stress
Optimized energy consumption

Bandera reports specific energy consumption of up to 0.21 kWh/kg for Twin PET®, excluding the chiller and material conveying systems.

Preservation of PET IV Value

One of the key process parameters in PET recycling is preserving the polymer's Intrinsic Viscosity (IV) value as much as possible.

The low shear stress and controlled process structure of HVTSE® technology used in Twin PET® help preserve the integrity of the polymer chains. This approach is intended to reduce IV loss that may occur during extrusion.

Reduced Risk of Yellowing

Avoiding high-temperature pre-treatment processes such as densification or drying helps prevent unnecessary thermal load on PET flakes.

Bandera positions Twin PET® technology with the objective of minimum yellowing. This approach is important for preserving the natural appearance of recycled PET and reducing the need for color-correcting additives.

High Capacity up to 5,000 kg/h

Twin PET® has been developed for high-capacity PET recycling applications.

The Bandera Twin PET® product family includes models capable of reaching production capacities of up to 5,000 kg/h with a single extruder.

Twin PET® Models

Model	Capacity
TwinPET 1600	1,100 – 1,600 kg/h
TwinPET 2300	1,700 – 2,300 kg/h
TwinPET 3000	2,400 – 3,000 kg/h
TwinPET 4000	3,100 – 4,000 kg/h
TwinPET 5000	4,100 – 5,000 kg/h

Actual capacity is determined according to PET flake quality, moisture, contamination, IV value, material source and line configuration.

Processing Different PET Waste Sources

Twin PET® is a flexible recycling solution designed not only for PET bottle flakes but also for processing different PCR and PIR sources.

Processable PET Waste

PET bottle flakes – PCR
PET tray flakes – PCR
PET flat film waste – PIR
PET skeleton waste – PIR
PET powder and fines – PCR
PET washing plant waste – PCR
Industrial PET production waste

This material flexibility enables PET waste obtained from different sources to be processed within the same recycling infrastructure.

Bottle-to-Bottle PET Recycling

Twin PET® can also be used as part of a Bottle-to-Bottle recycling chain with the appropriate process infrastructure.

Bandera states that HVTSE® extruder technology can be used together with Polymetrix SSP systems, providing a solution for obtaining bottle-grade PET through a solid-state post-polycondensation (SSP) process after extrusion.

Within this configuration:

PET Bottle Flakes → Twin PET® / HVTSE® → PET Pellets → SSP → Bottle Grade PET

a recycling chain can be established.

During the HVTSE® extrusion stage, decontamination and minimum yellowing are targeted, while the SSP stage is used to bring PET to bottle-grade level.

Flexible PET Recycling for PCR and PIR

Twin PET® can be used for processing both Post-Consumer Recycled (PCR) and Post-Industrial Recycled (PIR) PET sources.

These can include:

PET bottle flakes
PET tray flakes
PET film production waste
PET skeleton
PET fines
PET washing plant waste

This flexibility enables PET recycling facilities to operate with different raw material sources.

Bandera's Experience in PET Technology

According to Bandera's official product information, the company has completed more than 300 PET flake treatment plant installations worldwide.

This experience has provided an important foundation for the development of PET flake processing technologies and has supported the development of high-capacity recycling processes with Twin PET®.

Key Advantages of Twin PET®

Patented HVTSE® co-rotating twin-screw extrusion technology
52D extruder length-to-diameter ratio
Dryerless PET flake processing
Process without densification pre-treatment
High-vacuum degassing
Low shear stress
Process designed to reduce IV loss
Minimum yellowing target
Capacity up to 5,000 kg/h
Flexibility to process PCR and PIR PET waste
Processing of PET bottle, tray, film, skeleton and fines
Process infrastructure suitable for Bottle-to-Bottle applications
Integration capability with Polymetrix SSP systems

Technical Specifications

Feature	Twin PET®
Technology	PET Recycling Extrusion
Extruder	HVTSE® Co-Rotating Twin-Screw
Extruder L/D	52D
Pre-Drying	Not required
Densification	Not required
Degassing	High vacuum
Maximum Capacity	5,000 kg/h
PCR	PET Bottle, PET Tray, PET Fines, Washing Plant Waste
PIR	PET Flat Film, PET Skeleton Waste
Main Product	Recycled PET pellets
Bottle-to-Bottle	With Polymetrix SSP
Models	TwinPET 1600 / 2300 / 3000 / 4000 / 5000

High-Capacity Solution for PET Recycling

Bandera Twin PET® combines high-capacity PET recycling with HVTSE® co-rotating twin-screw extrusion technology, high-vacuum degassing, a dryerless process and a low material stress approach.

Capable of processing different PET sources ranging from bottle and tray flakes to PET film and industrial production waste, Twin PET® provides a scalable technology for the production of high-quality recycled PET pellets.

Bandera Twin PET® – High-Capacity PET Recycling Technology, Backed by Somplast.