GENIOPLAST® Performance Additive


Additives are of crucial importance to the
plastics industry: nowadays, innovations do not evolve from the development of new base
polymers, but mostly from using additives to optimize existing polymers. Plastics are becoming more widespread in everyday
life. But as they become more and more popular in use, they are expected to perform even
better. Meeting these raised expectations requires
the development of new polymers which possess enhanced properties. But that approach is
extremely time-consuming and cost-intensive. It is much more efficient to optimize the
properties of existing plastics by incorporating new additives. GENIOPLAST® is a high-performance additive
developed by WACKER. It is a unique combination of high viscosity
silicone gum and a specially / a specific modified silica. GENIOPLAST® Pellet S provides permanent
property enhancement of thermoplastic compounds, it is non-blooming and you will find no free
silicone on the surface of finished parts. Due to its pellet shape, it can be easily
applied in all standard thermoplastic compounding processes. In the WACKER innovation center, a twin-screw
extruder is used to develop plastics with requirement profiles that match customer specification. The GENIOPLAST® additive benefits not only
the compounding process. It can also be used to adjust the end properties
of the compound to the desired level. Adding GENIOPLAST® concentrations of 0.1
— 1 % during processing confers the following advantages • A better process and improved workflow • Higher extruder speed • Lower nozzle pressure • reduced pressure build-up • and less melt fracture After the compounds have been prepared in
the extruder, they are injection molded to test specimens in the innovation center. Test specimens for the automotive industry
typically have smooth or grainy surfaces. Once they have been made, they are sent to
the lab for further specific tests. Specifically for automotive interior applications,
demand in superior scratch and mar resistance is rising and requires superior additives.
GENIOPLAST® Pellet S is fulfilling the high standards and requirements of the German automotive
industry. We are supporting product developments of our customers, in our lab, by performing scratch and mar tests according to the relevant standards of the automotive industry. In the
Erichsen scratch hardness test, a cross-cut
pattern of lines roughly 2 mm apart is scratched onto the surface of both a textured and an
untextured plastic surface. Horizontal scratches are made first. Then
the plate is rotated through 90° so that more scratches can be cut at right angles
onto the horizontal lines. Once on a plate made without any additive,
once on a plate made with 3% GENIOPLAST®. The brightness or luminosity (delta L) is
then measured. A total of 5 measurements are taken on each
plate. The difference in brightness between the scratched
and unscratched areas must not exceed a delta L value of 1.5 The larger the difference, the worse the material.
It is also important to know if there is any great difference between the 5 individual
values obtained for each plate; if so, the anti-scratch additive was poorly
dispersed. Surface toughness is assessed in the crockmeter
test, which was originally developed by the textile industry, but has been adopted by
the automotive industry. It measures the stability and abrasion resistance
of the test specimen. The specimen is inspected for its rubbing
fastness. The result is ranked on a scale of 1 to 4,
where 1 means no visible change and 4 means a marked change. The Erichsen testing device is also use for
performing the plane-flattening test. This test simulates fingernail scratches on
surfaces. In this case, the gloss (delta G) is measured
by placing the spectrometer on a treated and an untreated area. A low delta G indicates a small change of
gloss and is therefore a proof of high quality. The advantages of adding GENIOPLAST® in a
concentration of 1 — 5 % can be summarized as follows: • better scratch and abrasion resistance • improved surface lubricity and slip • lower coefficient of friction • soft and dry surface touch and feel • better mechanical properties • no odor, no fogging GENIOPLAST® Pellets have proven their
value also in applications for cable jacketing, for electro and electronic housings and in
various applications for thermoplastic elastomers, by improving processing, scratch and abrasion
resistance. Due to their versatility and their easy-to-use performance in thermoplastic compounding
operations, we will see them also in many more fields of application in the near future. WACKER CREATING TOMORROW’S SOLUTIONS