Cable accessories

Graphene nanotubes for medium voltage cable accessories: stable electrical conductivity and extended service life

Cable connectors, cable sleeves, and cable trays are widely used in electronic communications, energy, and electrical power systems. Parts of these engineering systems must be electrically conductive and fully screened and touchable to provide complete safety for personnel. Graphene nanotubes outperform conventional conductive additives, providing inner and outer semi-conductive layers of cable accessories with stable and consistent resistivity, longer service life due to enhanced strength, and easy processing thanks to the very low dosage required. This unique combination of properties not only ensures reliable cable protection even after aging but also delivers excellent surface quality and extended durability.

Cable accessories
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Main properties

  • Permanent volume resistivity
    1.0 × 10⁸ Ω·cm

    Permanent volume resistivity 1.0 × 10⁸ Ω·cm
  • Improved mechanical
    properties

    Improved mechanical properties
  • Easy
    processing

    Easy processing
Anti-static cable accessories

Anti-static cable accessories

What are cable accessories?

What are cable accessories?

Medium voltage cable accessories are essential in power distribution, industrial installations, renewable energy, transportation, and construction—anywhere cables are terminated, joined, or connected, especially in high-voltage and sensitive environments. Semi-conducting layers in cables make the electric field manageable and uniform, eliminate high-voltage danger zones, and thereby significantly increase the reliability and service life of cable insulation.

To provide effective semi-conductive properties, they must meet strict volume resistivity requirements of <50 Ω∙cm.

Graphene nanotubes outperform traditional additives

Graphene nanotubes outperform traditional additives

Ultra-long, flexible, and conductive, graphene nanotubes form a robust 3D network in materials at ultralow concentrations of 0.15–0.3 wt.%. Unlike carbon black, multi-wall carbon nanotubes, and polymer-based anti-static agents—which require high dosages, lose conductivity over time, weaken mechanical properties, and complicate processing—graphene nanotubes enhance durability and ESD protection while preserving elasticity and hardness, outperforming conventional conductive additives across all key parameters.

DIAGRAM
  • TUBALL™
  • MWCNT 1
  • MWCNT 2
  • Reference

* This diagram provides average trends compared with other additives, based on OCSiAl data. Product performance may vary depending on product type and formulation.

Permanent electrical conductivity

Permanent electrical conductivity

From 0.15 wt.%, TUBALL™ MATRIX in rubber forms a conductive 3D network, enabling a full range of electrical resistivity of 10–10⁸ Ω, not dependent on humidity and stable over a long service life, safeguarding people and sensitive devices from electrostatic charge and damage.

Permanent electrical conductivity
Improved mechanical performance

Improved mechanical performance

The distributed, uniform network created by TUBALL™ nanotubes within rubber significantly enhances mechanical properties such as tensile strength, elongation, and tear resistance, providing the end product with a longer service life.

Improved mechanical performance

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MATRIX sample
Additional benefits

Additional benefits

  • Low hardness and
    viscosity

    Low hardness and <br/>viscosity
  • No carbon release
    to surface

    No carbon release <br/>to surface
Ready-to-use forms of nanotubes

Ready-to-use forms of nanotubes

TUBALL™ MATRIX 600 series is a line of concentrates with high-quality dispersed TUBALL™ graphene nanotubes designed for elastomers. They provide compatibility with standard processes and equipment. The concentrates can be added during the mixing or compounding stage and don’t affect the manufacturing process.

Contact us for product processing guidelines and additional technical documentation

File formats
TUBALL™ MATRIX 601

Agente conductor no reticulado para siliconas líquidas, que no causa impacto negativo en el color, la viscosidad y la durabilidad del material

TUBALL™ MATRIX 602

Agente conductor reticulado para siliconas líquidas, que no causa impacto negativo en el color, la viscosidad y la durabilidad del material

TUBALL™ MATRIX 605

Agente conductor reticulado, que duplica la durabilidad de las gomas de silicona HCR y garantiza la oportunidad de su coloración

TUBALL™ MATRIX 610

TUBALL™ MATRIX 610 es un masterbatch versátil diseñado específicamente para compuestos de caucho EPDM.

Los nanotubos TUBALL™ proporcionan un nivel estable y permanente de conductividad eléctrica y mejoran las propiedades mecánicas de varios tipos de EPDM.

TUBALL™ MATRIX 613

A concentrate specifically designed to provide superior electrical conductivity to silicone compounds (LSR, RTV).

Application cases

Application cases


Media

  • Conductive elastomers: Prevent negative trade-offs in mechanical properties and color due to SWCNT