WIRE & CABLE | MATERIALS
compounds can be produced that offer total shielding effectiveness of 34.4dB at 915MHz and 35.1dB at 2.45GHz. The researchers cite automotive and telecom among early target adopters for polymer based shielding systems, estimating that a 0.5-0.6mm layer in a typical automotive PVC twisted pair cable construction could realise a 75% weight saving and 20% reduction in production costs. The compounds produced by Delta Tecnic
incorporate total levels of graphene and other additives of close to 30%. However, the researchers say the level of graphene required to achieve the necessary shielding level in any particular cable application varies according to the type of cable, the level of electromagnetic shielding required, and the desired mechanical properties. They also point out that achieving the required dispersion is a complicated and costly process that cannot be achieved during the cable manufactur- ing process but add that, once compounded, they are not difficult to work with. “Graphene-based conductive compounds can be easily incorporated into existing production processes, making them a practical and cost-effective solution for manufactur- ers looking to improve the properties of their products,” they claim.
Renewable demands Growing demand for cables for renewable energy and electric vehicle applications is expected to present new opportunities for BASF’s Irgastab Cable KV 10 premium multifunctional polymer additive antioxidant, according to the company. Developed for MV/HV XLPE cable insulation, KV 10 is a liquid-form primary antioxidant for XLPE that also acts as a heat stabiliser, providing superior long-term thermal stability. The company says the additive provides very good scorch protection while its high purity enables excellent long-term electrical performance and long service life of MV/ HV power cables.
LAPP’s Etherline ethernet cables can now be supplied with sheathing in BASF’s part-renewable Elastollan N TPU
Irgastab Cable KV 10 is included in BASF’s
Valeras portfolio, which aims to help customers develop more sustainable formulations and to keep pace with global regulatory developments. The latest addition to the Valeras toolbox is Product Carbon Footprint data covering a number of its antioxidant and light stabiliser products. BASF helped cable maker LAPP improve the carbon footprint of its Etherline FD P Cat.5e industrial ethernet cables. The company now offers the products with a standard fossil-based BASF TPU sheathing or with its Elastollan N, which contains up to 60% renewable raw material derived from corn. Mechanical and chemical properties, UV resistance, and processability are retained. The bio-based product achieves an improve- ment in CO2 footprint of around 15%. “Using plastics from rapidly renewable raw materials with an organic basis is a great way for us to reduce the need for plastics from fossil raw materials and at the same time reduce the carbon footprint of our products,” says Alexander Terpe, Head of Cable Product Development at Lapp.
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