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New additives from ROWA Masterbatch improve mechanical properties

Making the (almost) new from the old – Advances for recycling
The MVR for virgin PET, PET which has been extruded four times and PET which has been extruded four times + 5% ROWALID PET-A103A SP: The MVR was significantly increased by extrusion four times, which indicates significant chain degradation. By adding 5% ROWALID PET-A103A SP, it was possible to attain the original MVR of virgin PET and therefore the processing quality once again.
The MVR for virgin PET, PET which has been extruded four times and PET which has been extruded four times + 5% ROWALID PET-A103A SP: The MVR was significantly increased by extrusion four times, which indicates significant chain degradation. By adding 5% ROWALID PET-A103A SP, it was possible to attain the original MVR of virgin PET and therefore the processing quality once again.

(pressebox) (Pinneberg, 2022-09-06) High quality in polymers is crucial in order to increase their recycling rate. The ROWA Masterbatch laboratories have long accepted this topic – the specialists in the laboratory are constantly working on finding solutions for how plastics can be optimized in order to make meaningful recycling possible. The use of recycled plastics has so far been limited by the compromised mechanical properties and processability as a result of polymer degradation. An exciting new development from ROWA Masterbatch for PET now demonstrates how degradation or breakdown of the polymer chain can be counteracted:

The active substance in this Masterbatch is a so-called chain extender. This “chain extender” reacts with the ends of the polycondensate chains. The polymer chains of the degraded polymer, with a low molecular weight, are combined with one another and form longer-chain polymers.
 
Studies have shown that the melt flow index (melt volume-flow rate, MVR) of degraded PET can be restored with a dosage of 5% of ROWALID PET-A103A SP (see graphic). The impact strength of PET which is extruded multiple times could also be almost doubled. The transparency of the PET is maintained here. This means that even high proportions of regranulate can be mixed with new PET without significantly worsening the physical properties.

contactperson:

Frau Dr. Natalia Olichwer
ROWA Masterbatch
Telefon: +49 (4101) 706-01

About ROWA GROUP Holding GmbH: The ROWA GmbH was established in 1958 and is a partner in the ROWA GROUP of companies. The brand ROWA stands for technical competence, modern product design and customer oriented service the world over. Tailored customer solutions are part of the ROWA tradition and are a matter of course! The development of new products, the search for alternative raw materials and the constant and sustained optimization of our processes, coupled with modern technology, motivated employees and economical environment protection enjoy the highest priority in our company. In 2010 the ROWA GmbH has been renamed into the ROWA GROUP Holding GmbH and the departments Lack and Masterbatch were newly formed as ROWA Lack GmbH and ROWA Masterbatch GmbH specialist division: Color and additive masterbatches.

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The MVR for virgin PET, PET which has been extruded four times and PET which has been extruded four times + 5% ROWALID PET-A103A SP: The MVR was significantly increased by extrusion four times, which indicates significant chain degradation. By adding 5% ROWALID PET-A103A SP, it was possible to attain the original MVR of virgin PET and therefore the processing quality once again.
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