HIGH-TEMPERATURE PLASTICS | MATERIALS
More thermoplastics are taking the heat under the hood, on the circuit board and in the
kitchen.Peter Mapleston reports on the latest high-temperature engineering materials
Heat resistance: take your pick of performance polymers
From humble modified polyamide 66, through LCP, PPA and PPS, all the way through to top-of-the pyramid polyaryletherketones, the choice on offer for moulders and OEMs looking for thermoplastics with enhanced resistance to high temperatures continues to grow. Here is a look at some of the latest developments. Kuraray recently expanded its E&E grade
portfolio to meet the demands of the European market, with new 30% glass-filled (GF), halogen- free UL94 V-0 grades of Genestar polyamide 9T. Genestar, a form of polyphthalamide (PPA), is best known in the Asian market, where it is used for surface mount technology (SMT) connectors. Kuraray emphasizes its ability to perform in very humid conditions – it has an intrinsic MSL (Moisture Sensitivity Level) of 1, meaning there is no time limit for components to be left unpacked before they can be soldered – and its ease of processing.
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Now, says Wim Denissen, market development specialist with EVAL Europe (Kuraray’s subsidiary headquartered in Antwerp, Belgium), the company wants to provide these benefits in Europe too, with the Genestar GP-series. “The newly developed GP2300S is a standard 30% GF grade which can be used for various reflow applications,” he says. “GP2300F is tailored for thin parts (with wall thicknesses under 0.3 mm) thanks to its extreme high flow and can be used as an alternative for LCP and offer enhanced ductility, a higher CTI and weld-line strength.”
Denissen also highlights new black laser-transpar-
ent grades with 30, 35 and 50% glass fibre content. “An issue often encountered by design engineers is the poor laser weldability of parts made from PPS,” he says. “The combination of high temperature performance, chemical resistance and laser transpar- ency makes Genestar a suited alternative.”
� September 2018 | INJECTION WORLD 33
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