electrical & electronic | Materials
Corrosion performance of Solvay’s TechnylOne J60X1Vs30 against fl ame retardant PPA at 300˚C and 320˚C
provide good electrical performance at higher operation temperatures - the company claims an RTI for dielectric strength (UL 746B) of 140˚C at 0.4mm and 150 ˚C at 0.75mm. The black grade is also laser markable. BASF says the material is targeted at application in connectors, contactors and switchgear. Among the latest introductions from Lanxess is
Below: Solvay’s specialty Lavanta PCT offers im- proved thermal resistance for LED backlight components
Durethan BG60XXF, a new high fl ow PA6 with a high level of reinforcement designed for production of thin wall parts such as tablet PC shells requiring high levels of stiffness and a good quality surface fi nish. The new grade incorporates 60% by weight of glass fi bre and glass microsphere reinforcement. “The unique feature of this material is that its shrinkage is signifi cantly more isotropic, and components therefore hardly tend to warp at all. We see major application opportunities in thin- walled, high-stiffness back shells for tablet PCs, but also in automotive interiors,” says Dr Stefan Theiler, a Lanxess technical specialist for highly reinforced polyamides.
Automotive challenges The automotive industry places particularly tough demands on its electronic systems. BASF has recently extended its range of polymers for anti-static automo- tive applications with the introduction of a new carbon fi bre reinforced Ultadur PBT. Ultradur B4300 C3LS is targeted at applications where components must retain their anti-static performance after contact with fuels or exposure to high temperatures. The new grade contains 15% carbon fi bre reinforcement and offers low volume and surface resistance, low water absorption and mechanical properties similar to a 30% glass reinforced PBT. Suitable for production of thin wall parts, it can be
64 COMPOUNDING WORLD | June 2015
laser marked and welds easily to other PBT grades. An emerging new application area for polymers in the car industry is in production of enclosures and components for automotive radar and sensing systems, where electronic systems must be shielded from any electromagnetic interference (EMI) that may disrupt signal processing, according to Neil Hardwick, market- ing manager for conductive products at US-based compounder RTP Company. “RTP Company’s EMI shielding compounds are an ideal solution for engi- neers who need to replace metal components with lighter-weight materials that are simple and economi- cal to produce without sacrifi cing critical EMI shielding performance,” he says.
Radar and sensing system components made with the company’s EMI compounds provide consistent EMI shielding properties while minimising total system cost. Moulded-in shielding performance is said to be a more reliable and economical approach than coating moulded plastic parts in a secondary process. RTP says it can tune the performance of EMI compounds to meet specifi c requirements, incorporating additional function- ality such as improved thermal conductivity, mechanical reinforcement or fl ame retardance. Base polymers include PA, PBT, PC and PEI.
Connected thinking Solvay Specialty Polymers has developed a second generation version of its Lavanta high performance polyester that is already being used by a number of moulders in Taiwan and China in LED TV backlight applications. Lavanta 5115 WH224 is a 15% glass reinforced polycyclohexylene terephthalate (PCT) formulated for improved processibiity. “This second-generation material is an important
achievement because it exceeds the processing requirements of the LED industry, enabling molders to maximise productivity and achieve greater effi ciencies,” says Glenn Cupta, global business development manager for electrical/electronics for Solvay Specialty Polymers. “The enhanced processability is achieved without sacrifi cing the excellent initial whiteness and whiteness retention of the material.” The new grade can be processed at a mould
temperature of 125˚C, lower than competitive PCTs yet still suffi cient to achieve maximum crystallinity. The resin offers good mechanical performance, while moisture absorption and dimensional stability is said to be better than PPA. It is suitable for production of LEDs operating at junction temperatures up to 150˚C, which the company says is 30˚C higher than competitive PPA, PA6T and PA9T grades. The company has also added a new grade to its
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