While modern industry lives in the hype of AI, blockchain, and other digital technologies, cables remain the unsung heroes. As such, they face battles that very few people see, like abrasion, chemical exposure, high temperatures, and electromagnetic interference. Traditional cables are mostly based on metal conduits and plastic coverings.
Still, Industry 4.0 calls for advancements. For a long time, these materials have been considered cost-effective, but that’s arguable.
Indeed, they are cheap, but they don’t last long and don’t offer solid protection either, meaning that they often must be replaced. Here are the most innovative materials for cable protection today.
Self-Healing Polymers
Compared to traditional materials, self-healing polymers are almost like science fiction.
The cue is in the name: these polymers can “heal” from damage autonomously. When their surface is damaged, a chemical reaction immediately begins, restoring its insulation.
Polyurethane, polyimide, and polyurea are some of the most used elements for that purpose. These polymers have been touted as the future of manufacturing for data centres.
Self-healing cable protection may involve a quite complex manufacturing process. The coverings can be equipped with microvascular ducts containing a healing chemical, which is released whenever the surface is damaged, filling the cracks.
Microcapsule-based systems work similarly, but replace ducts with several capsules along the spaghetti tubing surface.
There’s also a supramolecular process, which is based on hydrogen bonds that can be broken and rearranged.
Meanwhile, some polymers (like ethylene-anisylpropylene copolymer) don’t require special engineering and can self-repair without the help of built-in microcapsules or ducts.
High-Performance Thermoplastics
Regular plastics have little heat resistance, but high-performance thermoplastics can retain their properties at temperatures above 150ºC.
In fact, they can handle short-term exposure to much higher temperatures. They are physically strong and have been built for superior chemical resistance, too.
In some cases, these thermoplastics are stiffer than metals, while being much lighter.
Thermoplastic cables are necessary in a wide range of industries, from electronics to aerospace, including medical and automotive purposes. Materials include polyetheretherketone (PEEK), Polyvinylidene fluoride (PVDF), Polyphenylene sulfide (PPS), and Teflon.
The most advanced thermoplastics are based on a cross-linking process that dramatically improves their resistance to environmental factors. Such a process creates a three-dimensional and highly stable polymer network.
This cross-linking process can add varied degrees of stiffness and, in some cases, even have elastic memory.
Aramid Fibres
Aramid fibres are so lightweight and resistant that they are used in helmets. Kevlar (aramid yarn) might be the most recognisable name, but there are also other types, like meta-aramid and non-conductive aramid.
In any case, these materials provide outstanding tensile strength while retaining flexibility and being extremely lightweight.
They are also resistant to chemical abrasion, heat, flame, and cuts, but are sensitive to UV light. Unsurprisingly, they have become the primary option for projects where cables are exposed to extreme conditions.
Aramid fibres aren’t resistant to electromagnetic interference due to their chemical properties, but they’re used as a shield anyway.
New techniques improve their EMI-resistance properties by combining with MXenes and other conductive materials. Such materials can be woven with different fibres, used as a coating, or embedded as nanoparticles.
This combination results in a highly resistant composite fabric. However, such materials tend to be much costlier than traditional options.
Ceramic Fibre
Ceramic fibre sleeves are the best option for handling ultra-high temperatures up to 1,400ºC. Indeed, they stay strong where most materials would simply melt down, working as a sturdy shield for cables.
Ceramic matrix composites (CMC) are incredibly resistant to oxidation, using 3M’s Nextel fibres or similar materials in the composition. Given its lightweight and heat resistance, it has become a common choice for jet engine applications.
Alternatively, it’s possible to add nano-sized polymer composites like magnesia, silicon dioxide, or aluminum dioxide. They reduce space-charge accumulation on the cables, while improving dielectric strength, which is the maximum voltage a material can withstand without losing its insulation properties.
Nanomaterials
Nanomaterials are the next frontier of cable protection, using high-end technology to create unprecedented levels of mechanical strength. Nanocomposites mostly consist of CNTs (carbon nanotubes) and graphene oxide.
CNTs provide superior electrical insulation, thermal conductivity, and mechanical strength. Graphene oxide is typically used as a nanofiller for cable insulation to enhance volume resistivity in high-voltage systems.
Securing Vital Connections
The next generation of cable protection has arrived, meeting increasingly demanding standards. From data centres to jet engines, they shield the veins of modern industry, providing intelligent, highly specialised solutions.
In some cases, the upfront costs can be considerably higher than those of traditional materials.
Still, albeit costlier, these options ensure much superior performance and safety in the long run.
Above all, they can slash downtime to a fraction, saving significant resources. In other words, investing in such materials is a direct investment in operational integrity.
