Innovation | electrical and electronic
the first insert molding stage; this has a melting point of 325°C. The second insert molding stage can then be done with PA 46, which has a melting point of 295°C.
Tackling corrosion Solvay Engineering Plastics is readying a second generation of Technyl One, which the company intro- duced at K 2013. Technyl One technology is billed as providing high temperature performance and superior electrical properties compared to traditional high performance plastics, with low corrosion for improved tool life and high flow. Formulated to outperform standard PA66 grades, target applications include high-range mini circuit breakers, moulded case circuit breakers and contactors, as well as automotive sensors. A full range of products includes grades with reinforcement levels up to 50% and different stabilisa- tion packages, as well as some colours. The next generation, set for introduction at K 2016,
will have even better properties in terms of corrosivity and extractables, according to Mitchell. “Independent tests at the Fraunhofer Institute have shown that Technyl One is well ahead of the competition in terms of corrosion, but we want to go one step further and take it to the absolute mini- mum,” he says. BASF is also focusing on low corrosiv-
ity. It highlights its Ultramid A3U42G6 polyamide 66 compound, which meets UL 94 V-0 requirements at wall thicknesses as low as 0.4 mm. The grade can be moulded in light colours and processes easily with low deposit formation and corrosivity, says the company. “Its thermal ageing resistance has been considerably improved over that of well-known glass fibre-filled polyamide grades,” it says. With an RTI for dielectric strength (UL 746B) of 140 °C at a wall thickness of 0.4 mm and 150 °C at thicknesses starting at 0.75 mm, the grade is said to be especially well suited for use at higher temperatures. BASF also says that for applications requiring a
yellow card according to UL94, it now offers new optimised products of Ultramid B3S polyamide 6 with the suffix ”R03“. These grades are listed V-2 for wall thicknesses of 0.75 mm and higher. The specifications remain the same as the existing Ultramid B3S grades.
Flame concerns Major polyamide compounder Nilit Plastics says it is responding to E&E trends and industry needs with a variety of product developments that span not only standard polyamides (6 and 66) but also polyphthala- mide (PPA), which it has offered since 2014. It cites its
www.compoundingworld.com
flame-retarded Frianyl XT4 GF30 V0I PPA-based compound, which achieves UL 94 V-0 certification for all colours at thicknesses down to 0.4 mm. Nilit says this new grade responds to trends in miniaturisation as well as safety and temperature increases in processing and final use, and incorporates halogen-free flame retardants. Arno Wolf, vice presi- dent for sales at Nilit Plastics Europe also points out that customers in the E&E industry have full freedom to colour-code and colour-brand their applications using the PPA compound. Nilit Plastics also highlights the certification under EN 45545-2, the new pan-European fire protection standard for railway passenger vehicles, it has just achieved for Frianyl A3 H GF25 V0,
a PA66 30% glass fibre reinforced, heat stabilised and V-0 flame
retardant compound. The company now has seven grades of Frianyl indepen-
dently certified to comply with EN 45545. Railway national standards operated by
countries within the European Union will have to be
withdrawn by March 2016 at the very latest and all materials used in passenger carriages will have to be compliant with EN 45545. Under EN 45545, materials are given one of three
“hazard level” classifications: HL1, HL2 and HL3 (the highest), depending on their Limiting Oxygen Index (LOI), the density of smoke they generate and the toxicity of any gas they produce. Nilit has one PA6 and four PA 66 compounds rated HL3. They include varying levels of glass reinforcement, ranging from zero to 30%. The company also has also two compounds rated HL2.
Cost optimisation Lanxess has a developed a cost-optimised polyamide 6 for substitution of mineral-filled polyamides. Durethan BKV 25 FN27 flame-retardant polyamide 6, is said to offer improved performance at a comparable price. “It also features isotropic shrinkage, but is stiffer and stronger, can be freely coloured, and is easier to weld using ultrasound,” says Alexander Radeck, application
August 2016 | COMPOUNDING WORLD 79
Above: New small USB Type-C
connectors put very high demands on
internal plastic components, says DSM
Left: Schneider Electric is a user of Solvay’s Technyl One for circuit breakers
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