Optimising the properties of PET and rPET
As to be shown at Fakuma, Tosaf offers a wide variety of solutions for PET and rPET that help to optimise quality, efficiency, sustainability and costs during processing and recycling. With regard to the aesthetics and functionality of PET packaging, additives are available that correct the colour and gloss of rPET or prevent water droplets from depositing on the inner walls of packaging. Additives for absorbing and eliminating oxygen from the headspace of packaging, UV protection additives and – especially for milk containers – ultra-lightproof white masterbatch help to extend product shelf life. Acetaldehyde scavengers prevent changes in the flavour of water in rPET bottles.
Processing aid additives prevent electrostatic charging or change the surface properties of PET to prevent blocking and reduce the coefficient of friction. Special IR absorbers facilitate thermoforming with uneven wall thicknesses without impairing clarity.
Additives are used to improve the properties and quality of rPET by linking shortened PET polymer chains and thus increasing the molecular weight. Compatibilisers enable the recycling of PET-PCR blends that are contaminated with polyolefins or barrier plastics such as PA and EVOH. An NIR-reflective black masterbatch facilitates sorting during recycling.
HFFR for safe fire protection with PP
FR8719PP is an innovative, halogen-free flame retardant (HFFR) from Tosaf for PP pipes or moulded parts that are used, for example, for laying and fixing cable conduits and for conducting liquid media. Even in low concentrations, it makes it easy to comply with strict fire protection criteria and thus enables a switch to a more sustainable solution without the products losing any of their flame retardancy and properties. Processing advantages are the good dispersing behaviour in the melt and the very low formation of dye build-up during extrusion. If halogen-free is not a priority, brominated flame retardants such as FR6413PE and chlorinated, low-cost grades such as FR0049PE from Tosaf offer high thermal stability and fire protection without compromising the product properties.
PFAS-free for improved processability
Tosaf’s PFAS-free processing aids for the extrusion of polyolefins can be used without restriction instead of conventional formulations for film production. They meet the FDA and EFSA food contact requirements and, depending on the grade, are optimised in terms of either their rheological or their optical properties such as light transmission, haze and clarity. The unproblematic behaviour of PFAS-free monomaterial PE films in recycling is an advantage.
Coloured PPA without loss of properties
With PPAX, Tosaf Color Service has developed a new colour masterbatch carrier system that is based on the high-performance plastic PPA (polyphthalamide) and is combined with specially selected pigments that allow high processing temperatures. This makes it possible to produce products made with it in brilliant and varied colours without reducing the high heat resistance, very good strength, stiffness and toughness, low moisture absorption and high chemical resistance. It can also be used to laser mark coloured parts.
