Polymer-bonded propellant solutions for automotive safety applications cover the wide range of products with high gas yield and short combustion time for seat belt pretensioners, activators, and small side airbags to propellants with high oxygen balance and slower combustion for airbag deployment. Propellants for seat belt pretensioners are based on ammonium perchlorate and available with a burning behavior corresponding to the conventional nitrocellulose based propellants C/S 0400 and C/S 0600. Recent materials feature even the slow pressure rise in the initial phase like the single-base propellants. Due to the variety of airbag devices, two new different propellant compositions were developed by Nitrochemie. One offers high gas output at elevated temperatures, the other showed reduced gas yield at lower temperatures. Results of combustion gas levels and of the airbag propellants are given. Besides the experimental results, calculated values for two different temperatures are given. Even the experimental values are not realistic, because they were measured in a micro gas generator device, which is not too close to a real airbag system equipped with filters, cooling device and so on. The test results of both sample series in customers airbag devices indicate that it will be possible to design tailored propelling solutions to meet the specific customer's demands.
Polymer-bonded propellant systems allow optimal adaption to customer's needs
2008
51 Seiten, 1 Bild, 3 Tabellen
Conference paper
English
Polymer-bonded propellant systems allow optimal adaption to customers needs
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