Under the aspect of sustainability and the use of alternative materials, engineering thermoplastics such as polybutylene terephthalate (PBT) will be reinforced with renewable raw materials such as regenerated cellulose fibers. The University of Kassel is developing cellulose regenerated fiber reinforced technical thermoplastics in a state-funded project with further companies. Since pure natural fibers cannot withstand the high operating temperature of engineering thermoplastics (Ts>230°C), regenerated cellulose fibers are used. These fibers consist of over 99% renewable raw materials. In addition to the ecological aspect, regenerated cellulose fibers are distinguished from conventional fillers such as glass fibers by their lower density and higher impact properties. Since the engineering plastics PBT are increasingly used in the electronics and automotive sectors due to their high heat resistance and excellent insulating properties, a suitable flame retardant concept is essential. The Department of Polymer Engineering at the University of Kassel has tested various halogen-free flame retardant additives in cellulose and glass fiber reinforced PBT. Flame retardant additives based on phosphorus and nitrogen from Chemische Fabrik Budenheim and Clariant were used. The material starts foaming due to the synergy effect of the two flame retardant additives during ignition. Foaming prevents the material from dripping off and generating flue gas during flame treatment.
@inproceedings{doi:10.17170/kobra-202206216371,
author ={Gemmeke, Nicole and Fuchs, Johannes Philipp Ludwig and Heim, Hans-Peter},
keywords ={660 and Naturfaser and Faserverstärkung and Cellulosefaser and Thermoplast and Flammschutzmittel},
title ={Natural fiber reinforced technical (bio-) composites modified with halogen-free flame retardants},
copyright ={http://creativecommons.org/licenses/by/4.0/},
language ={en},
year ={2019}
}