42 Volts - Plastic in Automotive E & E Systems 10.40% 10.80% 5.80% 51.10% 31.90% Body Interior Drive Chassis E&E Use of Polymer in Cars 11.2% (142Kg) of total weight, (excluding tires). Source: BMW Trends in Automotive Technology Yesteryears Trends in Automotive Technology Today
E&EUse of Polymer in Cars
11.2% (142Kg) of total weight, (excluding tires).
European Union Directive 2000/53/EC
“End of Life Vehicle”
8 to 9 million tonnes of waste every year.
All trends require more electrical power
(Battery from 2kW to 6kW and beyond ?)
Increase in power require more voltage
Hence 42 Volts
Noticeable shift from:
Miniaturisation of components
Higher power and higher temperature
Increase in ambient temperatures
Gives an indication on the Maximum short term temperature a polymer can withstand under load.
Crastin* S600F10 (Unreinforced PBT)
HDT @0.45MPa 160 0C
HDT @1.8MPa 60 0C
Crastin* SK605 (30% Glass Fibre PBT)
HDT @0.45MPa 220 0C
HDT @1.8MPa 205 0C
HDT @5.0MPa 180 0C
Gives an indication of the long term temperature behaviour of a Plastic in respect to their;
Mechanical properties with impact
Mechanical properties without impact
Temperature at which after 60,000 hours (7 years) the properties drops to 50% of it’s initial value.
Zenite* 7130 Black (30% Glass Fibre LCP), @1.5 mm wall section.
Electrical properties 240 0C
Mechanical properties with impact 210 0C
Mechanical properties without impact 240 0C
Zytel* 101L (Nylon 6.6)
HDT @ 0.45MPa 2000C
RTI W/O Imp. 850C
Zytel* HTN PPA
Crastin* PBTA Rough Guide
Fuses, switches, relays, connectors
(connection & disconnection under
High amperage arc resistance (HAI) - Simulates
an arc occurs between two electrodes, under low
voltage but a high current, e.g. the connector pins
of a plug.
High voltage, low current, dry arc resistance -
Simulates a conductive path, subject to high
voltage between two electrodes, e.g. high voltage
conductors separated by a insulator.
The relative resistance of a material to tracking for voltage up to 600V, when the surface is exposed under electric stress to water with the addition of contaminants.
Wiring insulation, connectors
The HB rating is given if the burn rate, measured between the 2 marks,
does not exceed:
38,1 mm / min for 3,2 mm test bar thickness
63,5 mm / min for < 3,2 mm test bar thickness if the test bar stops burning
before reaching the 100 mm mark.
V-0 V-1 V-2
No of flame applications 2x10 s 2x10 s 2x10s
Max burning time single
specimen <10 s <30 s <30 s
Max burning time 5
specimens <50 s <250 s <250s
Dripping ignition of cotton no no yes
Afterglow <30 s <60 s <60 s
Afterglow ignition of cotton none none yes
5VA classification (bars & plaques)
1. No flaming or glowing - 60 s after
last flame application.
2. No ignition of the cotton by
3. No holes in plaques.
A one time re-testing of a set of test
specimens is allowed if only 1 test bar
Electronic control modules, wireless sensors,
Higher frequency and/or higher power devices,
creates more EM radiation
Surface resistivity 1ohm/sq
Volume resistivity 102 ohm-cm