MACHINERY | MELT FILTERS
Right: The new Erema Laser- Filter (LF) 2/406 from Powerfil offers outputs up to 3,000 kg/h
tions so that a minor change in the material’s temperature, viscosity or pressure can have a negative impact. “Adding recycled materials to the mix is an additional disruptor to an already delicate process. Depending on their size, contaminants can cause optical flaws and bubble ruptures, leading to line shutdowns,” he says. Processing recycled material
generates more waste than that of virgin polymers because melt is removed from the filter during backflushing and venting. Nord- son’s new filter is designed so this action occurs in a clean and maintenance-friendly way. The BKG HiCon K SWE-HD/ RS melt filter uses Nordson’s patented melt pressure controlled venting start approach that fully automates the filling of the screen cavity after a screen change for maximum pressure consistency. Filling is done carefully so that no air entrapment endangers the process or the end product. In addition, the safety cover can be opened vertically, allowing the operator to reach the filter piston from all sides, which facilitates cleaning during maintenance.
IMAGE: EREMA
Below: The AMBF PET-C system from Britas was developed to meet demand for higher quality rPET
Laser performance The melt filter business of Erema, Powerfil, has released a new laser filter with 50% more screen surface area than the previous model (LF 2/354) to increase productivity and improve results in quality-intensive recycling applications. The LaserFil- ter 2/406 can be used in recycling plants where throughput capacity needs to be increased and han- dles impurity levels up to 5%. It provides filtration as fine as 70 microns while continuously cleaning the
large screen with a scraper technology. Powerfil offers four models of the LF 2/406 filters: the LF 2/406 provides a total filter area of 1,947 cm2
and throughput capacity of 300 kg/h to 3,000 kg/h; the LF 2/406 twin has a total filter area of 3,894 cm2
and a throughput capacity of 1,200 kg/h to 5,200 kg/h; the LF 2/406 triple offers a total filter area of 5,841 cm2
and tro provides a total filter area of 7,788 cm2
capacity of 2,700 kg/h to 6,900 kg/h; and the LF 2/406 Quat- and
capacity from 3,700 kg/h up to 9,000 kg/h. Erema’s melt filter technologies are available in numerous sizes and variations, depending on the required throughput level and level of contamination, and can be integrated easily into an existing recycling plant. “For applications with a focus on melt quality and filtration
fineness, this increase in screen area ensures lower pressure and temperature at the same throughput rate, allowing even finer screen to be used for even better results in quality-intensive plastics applications,” says Robert Obermayr, Head of the Powerfil business unit. Germany-based Britas has expanded its technol-
ogy offerings with the introduction of Automatic Belt Melt Filter (ABMF) PET-C, a fully automatic melt filtering PET technology that features a double-cavity design for high output rates. It is equipped with the company’s ABMF technology, which provides fully automatic operation, continued production during screen change, and fine filtration and low melt loss. The system is applicable for post-consumer plastic waste with a focus on PET and PET-like materials, including low-viscosity plastics such as PA. It was developed to meet the growing demand and necessity for improved quality of rPET materi- als and is available in four models with a filter area ranging from 1,140 cm2
to 3,200 cm2 . Up to three
screen filters can be used at the same time, allowing users to set the exact filter fineness for a high level of filtration, while holding melt loss below 1%. The system delivers a maximum output up to 8,000 kg/h, depending on contamination and material properties. Britas also offers the CMF-BF continuous piston
screen changer with backflush function. It is designed for less contaminated industrial and production plastic waste and offers automatic filter cleaning using two backflush pistons. When a filter change is required, one of the two backflush
76 COMPOUNDING WORLD | June 2023
www.compoundingworld.com
IMAGE: BRITAS
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