MATERIALS | ELECTRICAL & ELECTRONIC
Two cell monitoring units and one battery management unit made by Hella are fabricated from Lanxess Pocan AF4130. The PBT+ASA exhibits extremely low warpage and very high flame retardance
certified HL3 under R22 and R23 requirements under the EN45545 standard for railway equipment. Vaesen says crosslinking is carried out (normally by a specialist service company) on moulded parts via beta or gamma irradiation (typically 50- 100kGy). Recyclability of finished parts is similar to that of thermosets – in other words, not so easy.
Polyester blend
applications such as circuit protection equipment or contactors for parts running in tough electrical arc environment. “Unfilled halogen-free compounds can also be a solution for connectors in electronics and lead-free soldering process where short term high tempera- tures have to be withstood,” says Gilles Vaesen in marketing and technology at the company. “Non-FR grades can also be of interest for parts in automotive, hot appliances, HVAC submitted to short term temperatures above the melting point of polyamide.” Crosslinkable Starflam grades such as RF0067K or RX12414 are said to offer the same advantages of standard HFFR PAs such as easy processing, good electrical and mechanical properties. Unfilled and glass fibre reinforced formulations achieve UL94 V-0 ratings at 0.4mm. They also perform very well in terms of smoke density and toxicity: they are
Lanxess is also hard at work on thermoplastic polyesters. It developed PBT-based Pocan AF4130 in collaboration with lighting company Hella to serve as a housing material for a battery manage- ment unit (BMU) and two cell monitoring units (CMU). Pocan AF4130 is a blend of PBT and acrylonitrile-styrene-acrylate (ASA) containing 30% glass fibres and a halogen-based flame retardance package. “The particular advantages of the material are its extremely low warpage and shrinkage, combined with its high flame retard- ance. We see great potential for application in precision components for vehicle battery systems,” says Marc Marbach, head of Sales Segments E&E in the Lanxess High Performance Materials business unit.
Hella fabricates the BMU and CMUs for a German manufacturer of battery systems for motor vehicles. The devices currently are used in the lithium-ion battery system of a German compact car. Their housings have large, flat surfaces as well as complex geometries along the edges and on the inside. They can be injection moulded cost-
PAEK connector in oil drilling application
Oil and gas electrical connector special- ist Rampart Products has specified Victrex HT polyaryletherketone (PAEK) for a new HPHT (high pressure-high temperature) electrical connector for transmitting power and data during drilling. The material as well as the connector has been tested beyond industry standards in real-world environ- ment simulations. This is Rampart’s first connector made in Victrex PAEK. The new connector had to be rated for temperatures beyond 200°C and pressures at 1,380 bar, providing also a reliable electrical connection while protecting expensive sensors and
56 INJECTION WORLD | October 2017
electronics. Additional requirements included compatibility with industry-standard pin patterns, extended mating cycles and assembly efficiencies. Traditionally, glass-rein-
forced epoxy has been used for this type of connector. Victrex says this material can crack and chip though, requiring oil service companies to replace the connectors. Rampart Products reports that the Victrex HT-based connector has more than twice the impact resistance of the thermoset connectors.
www.injectionworld.com
The connectors use Victrex HT PAEK to withstand high
temperatures and pressures
PHOTO: HELLA
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