RevoTECH Recycling Technologies

RevoTech recycling technologies from Bandera are systems for the up-cycling of post-consumer Polyolefins and PET which meet the demands of food packaging regulations.

Polyolefins Recycling

Bandera manufacture RevoTECH recycling lines using their highly developed twin screw technology, for the processing of post-industrial or post-consumer scrap. They offer customised solutions for all grades of polypropylene and polyethylene.

Two configurations are available:

Co-Rotating Single Twin Screw Extruder

Good for all polyolefins (not the case with single screw extruders)
For processing of well selected and pre-washed feedstock
High levels of degassing and super filtration system (mechanical decomtamination)
Extended vacuum zone – 52 L/D ration co-rotating screws with low shear design
Good mixing for high level of homogenisation and energy efficient compounding
Under-water pelletising system
Can produce finished material for injection or blow moulding operations

Cascade System

Two twin screw extruders (the out-feed of the first, feeding to the second). A more comprehensive process for producing a higher quality product.

The mot efficient system for up-cycling – gives a high grade technical solutions for low grade material
Can process very dirty feedstock with two or three stage filtration. Increased levels of filtration can also be specified if required.
Two de-gassing stages to reduce VOC (volatile organic compounds, often referred to as volatiles) and odours
The second extruder allows the addition of virgin polymer and/or additives for modification and balance of the melt (MFI) – for the production of either raw material or pellets
Melt flow index measurement system for controlled adjustment and repeatabillity
Fast colour change – due to self cleaning capability of the screws
De-odourising system available for increased odour extraction
Processed pellets can be sold as “Second Use Virgin Material”

Polyester Recycling

Bandera has a very long history of manufacturing extrusion lines for processing PET film and sheet for the food packaging sector and that extrusion technology, together with the expertise gained in minimising degradation and maximising purification, has been hugely beneficial for the development of recycling lines.

HVTSE – Highly Vented Twin Screw Extruders

Powerful melt venting purification
Large surface for de-gassing
Suitable for 100% regrind material
Low shear stress and low energy process
Unique ‘dry-less’ technology – absolutely no drying required for PET

PURe – for PET Food Grade Rigid Film

Solid state de-contamination system for post consumer PET material – both FDA and EFSA approved
Can use 100% regrind material for food packaging applications – complying with FDA and EFSA cleaning efficiency requirements
Can be supplied as a stand alone system, for use with existing lines
Long lasting components for cost effective maintenance, is proven to run continuously for long periods without having to chaneg components.
Best IV drop in the extrusion market
Very low energy consumption
Effective deodorisation is another benefit of the PURe system.

Bottle to Bottle

Bottle flake re-processing by using a combination of the HTVSE and PURe technologies
Super clean PET pellets produced, ready for the production of new bottles

Tray to Tray

Bandera have developed an extrusion coating process to enable the re-use of reclaimed PET trays – to form new trays, including those destined for sealable food packaging
Two coatings are applied to a mono PET substraight, the first giving a barrier layer and the second coating gives the sealing properties required with the top lid film
The resultant film is equivalent to the multi-material films currently on the market – but now is fully recyclable because only PET is used. (not mixed with other polymers, which can lead to chemical contamination). It also has much better transparency
This now allows flake from the recycling process to be re-extruded and coated for the production of new trays