Abstract: The published coefficient of friction values of different material combinations based on lab scale methods show limitations in the applicability for cable installation. Therefore, the friction of different cables in ducts was tested based on IEC/TR 62470 Method A. The numbers of test cycles were increased to understand the influence during long blowing distances. Cables using different sheathing materials (HDPE, PA and LSZH) were then tested in outdoor and flame-retardant indoor ducts. In addition, the influence of an admixed polymeric additive and an external lubricant were investigated.
Different cable and duct material combinations showed different coefficient of friction. The extended test methodology enabled to identify effects which allow to judge the blowing performance on a longer length. Using this, some materials exhibited signs of wear which resulted in continuous friction increase during the trials. This effect could be reduced by either using a different sheath material, a polymeric additive, or an external lubricant.
About the Presenter: Michael Heinz is leading the Process Development Team of the Global Materials Group at the Corning Technology Center Berlin. After working as a development engineer for copper cables for 3 years, he joined Corning in 2014 as a development engineer with focus on materials science. The major scope of his work is the development of flame-retardant fiber optic cables, materials and processing methodology. Special focus lies on flame retardant cables and halogen free flame-retardant compound development and testing.
Michael earned a degree in Materials Science & Engineering at the University of Bayreuth. He has over 13 years of experience in polymer materials development, processing and testing, including 10 years in wire and cable industry.