A New Production Line Reflecting a Legacy of Quality and Technological Advancement

At Longda Material’s modern manufacturing facility, a newly installed ROSS automated potting compound production line is now in full operation. From raw material feeding to final dispensing, every stage is digitally controlled with high precision—demonstrating Longda Material’s continued investment in process reliability and product consistency.

“Potting compounds are not consumer products—their quality issues may only surface months or even years later,” said Longda’s production team.
“That’s why every detail in the manufacturing process matters.”

Founded in 1993, Longda Material has developed over three decades of expertise in polyurethane, silicone, and epoxy systems. Rather than pursuing aggressive expansion, the company has focused on deep technical capability and process control, building a reputation as a reliable, long-term partner in demanding industrial applications. With the rapid growth of the new energy vehicle (NEV) sector, Longda is now extending this foundation to more advanced and higher-reliability markets.

Process Control as the Foundation of Quality

In potting materials, long-term performance is directly linked to manufacturing precision. The introduction of the ROSS automated production line significantly improves control over key variables such as metering accuracy, mixing uniformity, and batch consistency.

Compared to conventional production methods, the automated system reduces human variability and ensures tighter control of formulation and processing parameters. This is critical for applications where materials must withstand thermal cycling, vibration, and environmental exposure over extended service life.

At Longda Material, quality is not treated as a downstream inspection step, but as a result of controlled and repeatable manufacturing processes.

Built for Automotive-Grade Requirements

For new energy vehicle applications, potting compounds must maintain performance under complex and long-term operating conditions. Longda Material supports this through an integrated approach combining quality systems, technical development, and customer validation.

The company operates under ISO9001, ISO14001, ISO45001, and TS16949 standards, ensuring that quality management is embedded across sourcing, production, and testing. Its R&D and manufacturing network—spanning Yantai, Wuxi, Jinan, and Anqing, with technical centers in Shanghai and Suzhou—supports continuous material development and process optimization. Longda holds nearly 20 invention patents and 30 utility patents.

Equally important is market validation. Longda Material has been qualified by leading global manufacturers including Panasonic, Samsung, Siemens, Haier, Electrolux, and Midea—reflecting its ability to meet strict performance and reliability requirements.

From Material Supply to Application Solutions

As electronic systems become more complex, customers increasingly require materials that integrate into broader application solutions. Longda Material’s strength lies in its complete portfolio across polyurethane, silicone, and epoxy systems, allowing it to support diverse design and performance requirements within a unified technical framework.

A Controlled Value Chain for Consistent Performance

Longda Material maintains control across the full production chain—from raw material selection to finished product delivery—ensuring traceability and consistency at every stage.

While this approach may require greater upfront investment, it enables stable quality, reduced risk, and long-term reliability—factors that are critical for both engineering validation and procurement decision-making.