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.

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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

TUBALL™ allows to better maintain the balance of properties of the LSR

Permanent electrical conductivity

Permanent electrical conductivity

From 0.1 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

Contact us to discuss your project specifications or to request a TUBALL™ MATRIX sample

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
  • Easy, clean
    processing

    Easy, clean <br/>processing
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.

TUBALL™ MATRIX 601

液状シリコーン向け、架橋しない導電性添加剤で、色、粘度、耐性への負の影響なし。

TUBALL™ MATRIX 602

液状シリコーン向け、架橋可能な導電性添加剤で、色、粘度、耐性への負の影響なし。

TUBALL™ MATRIX 605

着色HCRシリコーン向けで、架橋可能な導電性添加剤で、耐久性を向上し、着色が可能。

TUBALL™ MATRIX 610

TUBALL™ MATRIX610は、EPDMゴムコンパウンド用に特別に設計された用途の広いマスターバッチです。

TUBALL™ナノチューブは、永久的で安定したレベルの電気導電性を付与し、さまざまなタイプのEPDMの機械的特性を向上させます。

TUBALL™ MATRIX 613 beta

Polydimethylsiloxane + zinc chloride (CAS-No. 7646-85-7) + zinc oxide (CAS-No. 1314-13-2)


Media

  • TUBALL™ MATRIX — Processing Guidelines

  • Anti-static and conductive hand layup composites: How to produce using graphene nanotubes