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INNOVATION | AUTOMOTIVE SURFACES


maintained. “Outstanding” thermal stability provides a broad processing window. The high flow also helps reduce VOC emissions, since processing temperatures can be reduced. On top of that, the good flow allows it to


replicate the finest details in mould surfaces. “The matte appearance of the surface is hence signifi- cantly improved in comparison to other PA/ABS grades on the market,” says the supplier. For exterior applications, Ineos Styrolution now


At Fakuma, Covestro presented a front module concept for EVs featuring individual design functional integration. One special variant is black panel technology, which makes use of a special Makrofol polycarbonate film with a light source behind to show up bright colours when it is illuminated from behind by LEDs


looking for a matte finish and colouring capabilities in applications, such as loudspeaker grills, column covers, seat covers and venting devices.” A. Schulman (now a LyondellBasell company) says its Schulablend M/MK product series, rival blends of PA and ABS, are characterised by easy flow, high-impact strength and very good optical appearance. The PA provides high rigidity and improved heat resistance to the blend, while the ABS reduces moisture sensitivity and hence warpage in moulded parts. According to the company, the flowability of Schulablend M/MK 6501 LE SF U is excellent, while good impact strength and tensile properties, as well as the Vicat softening temperature, are all


offers an AMSAN (Alpha-Methylstyrene Acryloni- trile) copolymer, which it says is an enhanced version of the its Luran High-Heat grade HH-120 with optimised scratch-resistance properties. Tobias Schulz, R&D Specialist, Global R&D, at the


company, says: “Luran High-Heat is a transparent base material allowing for an excellent colour depth including a rich deep-black or ‘piano-black’.” He says early tests and initial customer feedback confirm that the new grade “is considerably better in terms of scratch-resistance than other materials used for a similar purpose. In fact, it shows best-in-class results for uncoated and unpainted applications.” Covestro is pushing its polycarbonate for various interior and exterior automotive lighting applications. “Alternative drive technologies such as electric mobility, new forms of connectivity and autonomous driving require totally new car concepts,” it says. “This also includes a newly designed front section – an individual ‘face’ – of the car, with seamless, glass-like surfaces that can be


High gloss options


Engel is continuing its cooperation with Hennecke on the Clearmelt process for producing injection moulded parts with high-hardness, high-gloss transparent or coloured polyurethane surfaces less than a millimetre thick, applied in the mould. Fischer says the process produces higher performance surfaces than can be obtained via simple injection moulding with acrylics, particularly in terms of scratch resistance, and interest from potential users is high. But he also admits that the


extra functionality of a production cell incorporating PUR process- ing technology comes at a price that is not insignificant, so it really


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is a technology aimed at high volumes. Who will be first to use it? It’s the same old conundrum, Fischer says. Nobody wants to be the guinea pig going first, but nobody wants to lose


out on a potentially important market. Another technology is ColorForm


Engel produced prototype D pillars for an SUV using Clearmelt at the Plast show in Milan earlier this year


INJECTION WORLD | November/December 2018


from KraussMaffei, which achieved an important milestone a couple of years ago when the technology was adopted by Weidplas for production of A pillar covers on the Peugeot 3008 SUV. Since then, KraussMaffei has added quick colour-change capability, with the use of a dosing line for liquid colours separate from the two other lines for the two-components polyure- thane system used for the surface layer. A second company is also using ColorForm for production of parts with insert moulded real wood veneers that are protected by the clear resin.


www.injectionworld.com


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