NEWS Speeding progress in FR TPUs
Scientists from the Fraunhofer Institute for Structural Durability and System Reliability (LBF) at Darmstadt and the German Federal Institute for Materials Research & Testing (BAM) have combined to demonstrate more rapid manufacture of flame- retardant plastics, specifically thermoplastic polyurethane (TPU). The results of their joint project were on show at K2019. The research set out to
address the shear stress that builds up during TPU processing, which complicates dispersion of the flame retardant and makes the development of
Huber expansion update
The Fire Retardant Additives business unit of JM Huber has announced that the second phase of the planned fine precipitated hydrate expansion at its Martinswerk plant in Germany will be completed by the end of this year. The expansion will
increase capacity for Martinal LEO grades of fine precipitated alumina hydrate by about 20%. The company said that the investment will also help it deliver on “several significant sustainability improvements” at the facility. �
www.hubermaterials.com
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New research aims to speed FR TPU recipe development
suitable formulations “demanding and cost- intensive”. The researchers used Combinatorial Compounding/High Throughput Screening’ (CC/ HTS) to characterise the formulation, enabling compound development to
be “significantly accelerated”, it is claimed. The project also established that a rapid mass calorimeter is suitable for evaluating the flame retardance of any flame- retardant TPU as the different types displayed only a few,
albeit significant, differences in mechanical properties. Comparisons within material sets based on the same concepts showed “excellent correlations”. “The knowledge gained can now be used directly by companies in the development of flame- retardant formulations for TPU,” the partners claim. “Furthermore, the use of halogen-free flame retardants as part of the research project demonstrated synergies between various flame retardants, simplifying the development in companies in this growth market”. �
www.lbf-fraunhofer.de
Sukano proves the recyclability of light barrier PET compounds
Sukano, a Swiss specialist in additive and colour masterbatches, and blow moulding machinery maker Sidel have claimed a success in moulding white opaque light-barrier PET bottles from recycled material at virgin throughput rates without impact on colour, properties, functionality or production rates.
According to Sukano, a monolayer PET white bottle masterbatch was formulated and recycled using the European PET Bottle Platform recycling protocol. Melt viscosity, pressure and stability were tested and the material shown to be highly processable.
COMPOUNDING WORLD | November 2019
White PET bottles for dairy products on a Sidel production line
The material was said to show a very stable colour, remaining white even at 100% recycled content. Sukano said this material was then used on Sidel’s EvoBlow blow moulding equipment to produce 25%, 50% and 100% light barrier white opaque rPET bottles.
The development partners said that the difference in terms of colour shade in the polymer “was barely noticeable” and integrity of the light barrier was confirmed for extreme conditions, such as <0.1% light transmission at 550nm. �
www.sukano.com
www.compoundingworld.com
PHOTO: SHUTTERSTOCK
PHOTO: SIDEL
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