From the Sector

As the demand for recycled plastics grows, so does the size of the machines. This applies to the processing of polyolefins as well as to PET recycling. With its unique dimensions and production capacity, this new size of plant features a screw diameter of 280 mm, implemented for the first time in a VACUREMA® Basic 2628 T large-scale project for producing rPET pellets. EREMA has just shipped the plant to a customer in Brazil.

Up to 40,000 tonnes per year of rPET meeting the highest quality standards can now be produced. "For this purpose, we installed a screw with a length of ten meters, a diameter of 280 millimetres and a weight of 3.5 tonnes, which is the largest ever used in one of our recycling machines," explains Managing Director Michael Heitzinger. The screw was manufactured by 3S, a subsidiary of EREMA GmbH. No less impressive is the reactor of this recycling system, which, with a height of around 10 metres, is also unique and almost reaches the roof of the new production hall. 500 tonnes of input material were recycled during the test phase, which was subject to strict quality control. "The entire project was a great team effort," Heitzinger said, thanking everyone involved.

EREMA as a partner for large-scale projects
Just four years ago, the largest extrusion line supplied by EREMA was designed for a throughput of 15,000 tonnes per year. This size of plant was ordered by customers once or twice a year. In the meantime, machines like this leave the production site in Ansfelden every month. As early as 2020, EREMA proved to be a pioneer and reliable partner for implementing unique large-scale projects. That was when the food and beverage packaging manufacturer Envases Universales Mexico commissioned two VACUREMA® Basic 2625 T machines, each with a screw diameter of 250 mm and a capacity of 30,000 tonnes per year.

Indorama Ventures Public Company Limited (IVL), a global sustainable chemical company, announced its inclusion in the Dow Jones Sustainability World Index (DJSI World) and the Dow Jones Sustainability Emerging Markets Index (DJSI Emerging Markets) for the third and fifth consecutive year respectively. The successive years of DJSI inclusion reflect IVL’s strong commitment to sustainability with globally recognized industry best-in-class practices.

This year, 139 chemical companies were selected from more than 11,000 companies from 61 industries and about 5,300 companies eligible for S&P Global ESG indices. IVL ranked in the 97th percentile with full scores in the areas of environmental and social compliance, enabling policies through industry associations, human rights protections in the workplace and value chain, and sustainable water management including forecasting potential water related risks in operations.

Yash Lohia, Chief Sustainability Officer at Indorama Ventures, said, "As a global leader, this is an important milestone in our operations as we transform the chemical industry. Our inclusion in the DJSI for the fifth year running is a tribute to how IVL’s operations are contributing to a more sustainable future. Our strategy includes focusing on climate action, aligning with the world's net zero ambitions, strengthening the circular economy and PET recycling with our ambitious targets, and enhancing shared value with our stakeholders.”

The Dow Jones Sustainability Indices (DJSI) are a global benchmark for sustainability-driven companies, evaluating material governance & economic, environmental and social factors.

Under vacuum, the new BB Engineering large-area filter produces a homogeneous, pure melt with a targeted IV setting for instance, for returning polyester production waste to the melt flow, but also for achieving a homogeneous viscosity in the case of virgin material.

BB Engineering has expanded its melt filter portfolio to include a patented large-area vacuum filter designed especially for processing polyester waste. The so-called Visco+ filter is already known as the key component of the BB Engineering VacuFil recycling system. Now, it is also available as a separate and easily-integratable upgrade component for existing systems. Within this context, the uses of the Visco+ are by no means limited to just decontamination. Here, the Visco+ offers the following solutions:

• IV homogenization: if an existing production system is struggling with IV fluctuations, the Visco+ is able to actively intervene and balance out any irregularities;
• IV increase: if the final viscosity is insufficient when processing recycled materials, the Visco+ can increase the IV without the negative impact of long residence times.

In this way, the Visco+ enables fast and flexibly-controllable viscosity build-up and reliable viscosity monitoring of the polyester melt using a to-date unique, patented process. Depending on the intended end use, the melt can be ad-justed to the further processing procedure in a targeted manner. The requi-site melt properties above all the intrinsic viscosity, but also the purity and homogeneity are achieved in a reliable and reproducible manner and can also be adjusted during ongoing operation.

As a melt filter, the Visco+ operates like a liquid-state polycondensation unit. A maintenance-intensive reactor or a deposit-prone stirring unit are not required. Moisture is removed from the PET in the filter, which – in conjunction with an adjustable residence time – results in the desired IV increase in the vacuum. This enables a controlled IV build-up of up to 30%. The intrinsic vis-cosity is the central quality figure in PET recycling and rPET processing. It determines the melt performance in the downstream production process and the properties of the end products. The intrinsic viscosity is continually moni-tored by means of an integrated viscosity measurement unit and reliably adjusted in the event of deviations (caused by disparate input qualities, for ex-ample). At the same time, the filter provides an enormous material surface compared to the volume and continuously renews this. To this end, contamination can be removed particularly effectively from the starting material by means of automatically-regulated high-performance vacuum (1-30 mbar).

The Visco+ is particularly suitable for recycling PET waste that is to be reused for high-end products.