From August 6 to 7, 2026, the 2026 China Solid-State Transformer Technology and Application Ecosystem Conference (SST China 2026), themed "Technology Breakthrough · Ecosystem Collaboration," was successfully held at the Tongli Lake Resort in Suzhou. As a professional service provider in the field of electrical insulation materials, Rui'an Insulation presented Huntsman's dedicated resin solutions for solid-state transformers at the conference, joining industry stakeholders to explore technological breakthroughs and industrialization pathways for solid-state transformers.
This year's conference focused on the commercialization and industrial ecosystem development of solid-state transformers. A visit to Delta's Suzhou factory was organized during the event, where delegates gained on-site understanding of SST solid-state transformer implementations in smart microgrids, manufacturing, data centers, and other fields. Facing new market opportunities in the solid-state transformer sector, Rui'an Insulation leverages Huntsman's high-performance resin material systems to provide industry customers with full-chain insulation solutions covering material selection, encapsulation processes, and aging verification, helping upgrade equipment performance and reliability.
Huntsman SST Dedicated Resin Solutions: Precisely Covering Insulation Needs Across Multiple Components
As a globally leading specialty chemicals company, Huntsman has over 50 years of R&D accumulation in the electrical insulation materials field. It offers a comprehensive range of epoxy-based and polyurethane-based thermosetting resin systems, including casting resins, encapsulation resins, impregnation resins, and other full-category products. These are widely used in dry-type transformers, instrument transformers, insulators, bushings, switches, and other full-category power components, covering low, medium, high voltage, and ultra-high voltage equipment.
For different insulation components in solid-state transformers—such as medium-frequency transformer windings, power electronics module encapsulation, and insulation barriers—Huntsman can provide precisely matched resin material systems. Among them, the Araldite® CW5879/HW5879 epoxy vacuum casting system, a highlight at this exhibition, is a Class H insulating modified epoxy material specifically developed for high-frequency windings of solid-state transformers equipped with SiC wide-bandgap devices. It is suitable for vacuum casting scenarios in vehicle fast-charging solid-state transformers, commercial and industrial energy storage modular solid-state transformers, and high/medium/low-voltage cascaded solid-state transformers. It specifically addresses common industry failure issues such as high-frequency heating, thermal shock cracking, winding interface debonding, and excessive partial discharge in solid-state transformers.
The product's core application advantages are prominent:
Superior thermal shock resistance: The toughened formulation adapts to the complex operating conditions of frequent start-stop cycles and large temperature variations in solid-state transformers, effectively solving core failure issues such as cracking and debonding while extending the service life of the entire unit.
High thermal conductivity and heat dissipation: It breaks through the heat dissipation bottleneck under high power density in solid-state transformers, reduces winding hot-spot temperatures, and enhances continuous current-carrying and overload performance.
Strong mass-production adaptability: No on-site manual powder mixing is required. It is compatible with automated casting processes, enables bubble-free impregnation of fine-wire windings, ensures stable curing processes, and guarantees mass-production yield.
Stable high-frequency electrical performance: Low dielectric loss and low partial discharge. It is suitable for 20kHz–150kHz high-frequency SiC operating conditions with no risk of thermal runaway.
High cost-effectiveness: It meets the full-scenario reliability requirements of conventional solid-state transformers with hot-spot temperatures ≤120°C, offering significant cost advantages over high-end high-Tg epoxy systems.
Overall, the Araldite® CW5879/HW5879 epoxy casting system integrates high toughness, high thermal conductivity, low high-frequency loss, and ease of mass production, making it a preferred material for high-frequency winding casting insulation in solid-state transformers with long-term operating temperatures within 120°C.
Full-Chain Product Matrix Empowers the Upgrade of the Power Insulation Industry
Rui'an Insulation is an authorized distributor of Huntsman in mainland China. The two parties deeply integrate industrial resources and continuously provide high-performance materials and professional technical support to the transformer, motor, and electronics industries. In addition to Huntsman's advanced resin systems, Rui'an Insulation's Soflex® prepregs, Nomex® prepregs/diamond-pattern papers, cable papers, and other products also have mature applications in the transformer field. They cover multiple equipment categories including dry-type transformers and oil-immersed transformers, providing customers with comprehensive reliable protection from temperature resistance grades to mechanical strength.
With its diversified product matrix and professional technical service capabilities, Rui'an Insulation can fully meet customers' full-chain needs from material selection to process implementation, helping customers enhance product competitiveness and production efficiency.
Participation in SST China 2026 represents an important strategic move by Rui'an Insulation to closely follow the development trends of the solid-state transformer industry and deepen its cultivation in the power insulation field. In the future, Rui'an Insulation will continue to collaborate with Huntsman and other high-quality industry partners, continuously refining its products and service systems, and injecting momentum into the technological breakthroughs and ecosystem development of the power equipment industry.
