Producing PET food grade rigid film from PET recycled flakes
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As Bandera states: "In order to intercept the growing PET processing trend, we studied a solution based on a consolidated technology (HVTSE) that we empowered with a specifically engineered system (PURe), designed to process a pretreatment to obtain super clean material, suitable for direct food contact".
In fact, the Bandera twin screw technology has been on the market for some time, showing long-term reliability and high performances. According to company, this technology brings following benefits to the customer:
- less stress for the processed raw material,
- better melt purification,
- power savings,
- easier operative management of the whole line,
- faster colour and raw material switching (with no line stop),
- possibility to work up to 100% regrind material,
- problem-free raw material feeding and dosing devices,
- multiple raw material processable,
- foam sheet production.
In combination with the product range HVTSE (Highly Vented Twin Screw Extruders), Bandera designed the PURe system aimed at producing clean material for the food packaging industry, starting from conventionally recycled post-consumer PET flakes.
The tests performed show cleaning efficiency values exceeding the minimum EFSA and FDA requirements: with Bandera's system PET food grade rigid film for direct food contact can be produced with a recycled content up to 100%. This combined system achieved the No Objection Letter issued by FDA.
The new system has been designed to cover the most common output range requested by the packaging industry, through various models, which are directly sized to the standard production capacity of the relevant highly vented twin screw extruders supplied by Bandera as its core technology for the PET rigid film lines already supplied and/or to be supplied in the future.
