Graphene nanotubes make it possible to produce electrically conductive PU rollers and sleeves without compromising mechanical properties. They help to avoid the accumulation of electrostatic charge and dust generated during packaging, printing, or any converting process resulting in decreased production line stoppage and related loses. Until recently, carbon black and chopped carbon fibers were typically used as conductive additives for producing anti-static or conductive polyurethane rollers and composite sleeves. However, the high concentrations required of these additives, in the range of 5–15% of the total weight of the material, led to a loss of strength and reduced durability of products.
Graphene nanotubes, being one of the most advanced anti-static agents, make it possible to combine safety of polyurethane rollers and sleeves, smooth roller appearance, and targeted curing and processing time. The key is nanotubes’ unique morphology. Even an ultralow loading of nanotubes can provide PU products with stable electrical conductivity while maintaining the original mechanical properties, such as tensile performance and hardness. This previously unobtainable set of properties results in an optimized production cycle for sleeves and improved stability of casting.
To obtain volume resistivity within the range of 104–109 Ω·cm, the working concentration of graphene nanotubes needed is 500 times less than that of carbon black. Unlike carbon black, they achieve a uniform distribution in materials, preserve the original physical and mechanical properties, and leave no black “smearing” traces on the surface of finished products (fabric, paper, film, etc.), thus preventing the occurrence of rejects.
Easy-to-use concentrates of pre-dispersed graphene nanotubes developed by OCSiAl make it possible to homogeneously distribute nanotubes in polyurethane systems with standard equipment. This new graphene nanotube technology gives manufacturers the opportunity to add performance to their standard products without making processing more complicated.
Join our free webinar and differentiate yourself by improving your packaging process. Fabio Tombolato, Technical Support Manager EMEA at OCSiAl, will be waiting for you on June 7 at 11 am CET. The estimated duration is 40 minutes including a Q&A session.
Participation is free of charge. To learn more about OCSiAl and graphene nanotubes, visit tuball.com.