ADDITIVES | SURFACE MODIFICATION
Right:
Demonstrator parts in BASF’s new Ultramid Deep Gloss PA show almost no evidence of weld lines despite being unpainted
with the high gloss of amorphous plastics. The company says it is particularly
of
s. it
suitable for compo- nents in automobile
- e
interiors which require high-gloss anduire high-gloss and without the need for
further additives or coatings. ment, Transportation, Gloss processes lik
scratch resistance without the need for coa
BASF Group Leader Technical Develop- on, Performance Materials
ader Technical Develop-
Europe Xaver Hopfenspirger says Ultramid Deep ke a PA6 and is available in
fenspirger says Ultramid Deep
sample quantities. He says it combines high gloss and excellent resistance to scratching with high chemical and good UV resistance.
He says it combines high gloss “For Ultramid Deep Gloss, the polymer raw
materials and additives have been balanced in such a way that – apart from the high gloss and the depth of view – the continuous-use properties required for high-quality surfaces, such as resist- ance to scratching as well as sufficiently high UV resistance, are achieved,” BASF says. “Compared to other, uncoated high-gloss materials, Ultramid Deep Gloss impresses with its outstanding abra- sion resistance. For processing, the new BASF polyamide offers interesting potentials: it can be injection-moulded without variothermal mould technology, and there is no need for the compo- nents to be coated.” BASF is aiming Ultramid Deep Gloss at various automotive decorative trims, such as edges of displays and decorative panels around lights, as well as storage racks in headliners, inlays in doors and centre consoles and functional components such as
air ve er say
air vents. Hopfenspirg- er says the company has
parts cur ABS and the sights.C targe “pi bu su wh sha
feas openin
parts currently moulded in ABS and then painted in its sights. Currently BASF is targeting the traditional “piano-black” look, but other colours such as porcelain white, ivory or earthy shades may be asible, it says,
opening opportunities in
areas such as consumer goods. Resistance to wear is another important area of
interest in polymer development. South Korean firm Hyosung – which produces the Poketone aliphatic polyketone that is well known for its good wear and abrasion resistance – says it is continuing its research into these properties. Woody Hwang, the company’s Market Development Team Leader, says various wear resistant compounds are currently under evalu- ation based on a high viscosity Poketone grade (M630A) and other glass fibre or mineral filler reinforced grades with comparable stiffness to acetals. “PK high viscosity wear resistant grades show 1.5-2 times better wear resistant performance compared to modified POM grades, and have 30 times higher elongation at break and more than three times higher impact strength,” he says. Hwang also says that a recent study found that
Poketone is also very good at vibration and noise absorption. In Hyosung’s internal test to measure noise from Poketone gears and POM gears at different rotation speeds, the Poketone gears showed less noise generation compared with POM by more than 10dB difference (Figure 4). “Hyosung understands that noise reduction
effect of Poketone gears [can be attributed to] the material’s intrinsic damping properties, which can be inferred from loss modulus and tan delta value measured in DMA (Dynamic Mechanical Analysis),” Wong says. These are up to 3.5 times higher in Poketone than in POM at all range of temperature and frequency response.
Figure 4: The inherent wear resistance of polyketone results in a major reduction in gear noise Source: Hyosung
62 COMPOUNDING WORLD | November 2017
CLICK ON THE LINKS FOR MORE INFORMATION: ❯
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www.evonik.com ❯
www.clariant.com ❯
www.byk.com/en/additives ❯
www.croda.com ❯
www.basf.com ❯
www.hyosung.com
www.compoundingworld.com
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