Additive-Masterbatches

Newly developed additives enable improved flow behaviour when processing certain polymer groups with a significantly reduced temperature profile. Nevertheless, the melt viscosity corresponds to the required process window.

An innovative molecular design provides the necessary functionalities and represents an absolute novelty in the field of process aids. The NB 990850 PA natur (PA = processing aid) developed for this purpose is designed as an additive concentrate explicitly for use in PMMA (e.g. the widely known Plexiglas®).

AF Complex® EBA 990341 DRY natural is a highly effective absorber on a universal carrier that permanently binds moisture and acidic impurities in the recycling process.

It was developed for use with regrind and regranulates as well as talcum or chalk-filled materials. Aggressive reaction products, e.g. from printing ink residues or PVC impurities, are effectively neutralised and thus prevent tool corrosion. The addition of this additive also counteracts the problem of bubble or streak formation, which increases the surface quality of the finished part and allows a higher throughput in film or sheet applications.

At maximum effectiveness, the masterbatch binds approx. 200g of water per kg of masterbatch, which saves on the pre-drying of raw materials and speeds up the production process.

Processing stabilisers in the form of masterbatches keep the damaging influence of a recycling process on the polymers within limits.

AF-Complex® PP 990225 WS natural prevents the MVR increase in polypropylene (PP) in the recycling process and AF-Complex® PE 990220 AO natural limits cross-linking and gel formation in polyethylene (PE).

In addition to colouring, material properties are also extremely important, e.g. to achieve a certain mechanical strength. UV exposure has a damaging effect on all polymer materials over a certain period of time, meaning that these mechanical properties can be lost. Additional stabilisers are therefore required (e.g. UV absorbers), which can be added together with the colouring components of a masterbatch formulation - in this case, it is referred to as a combination masterbatch (combination of colour and additive).

All plastic products are subject to ageing processes. These can be slowed down by the use of additives. The photos show the ageing phenomenon on a polypropylene PP flower pot (so-called chalking).

The masterbatch is available on the basis of different carrier polymers, either as a single additive component or in combination with an AF-Color® colour masterbatch.