Yilong insulation materials (subsidiary of Shandong Sida Industry Co.,Ltd.) has built a strong reputation since its inception in 1966 as a state-owned factory in Zhucheng, Shandong. Through significant transformations—including a pioneering shift to a joint-stock cooperative system—it evolved into a modern corporation with a registered capital of ¥61.56 million, over 1,300 employees, and total assets around ¥320 million .

A vertically integrated industrial group, Yilong comprises three key divisions: insulation materials, textiles and glass fiber. The insulation materials arm alone has an annual production capacity exceeding 13,500 tons, serving over 20,000 enterprises in the electric, electronics, and machinery industries. Since 2001, Yilong has also exported laminated insulation materials to markets like North America, South Korea, and Western Europe, Russia, Latin America and etc with export revenues surpassing USD 2.6 million .
The company’s main laminated insulation products include:
Epoxy Glass Cloth Laminated Sheets
Epoxy Glass Cloth Laminated Rods and Tubes
Phenolic Cloth Laminated Sheets
Phenolic Cloth Laminated Rods and Tubes.
Phenolic Paper Laminated Sheets
Phenolic Paper Laminated Rods and Tubes.
Mica products
Insulation Papers
Engineering Plastic Sheets, rods and tubes
Glass Fiber Fabrics
Equipped with modern infrastructure—hydraulic presses, plastic production lines, mica processing units, and an in-house glass fiber mill producing around 3,000 tons annually—Yilong Electrical Insulation maintains tight control over both material quality and cost efficiency .
Listed among the Top 100 Chinese insulation material manufacturers, Yilong holds a strong competitive position thanks to its comprehensive production capacity, integrated raw‑material sourcing, and dual focus on domestic and export markets .
Yilong aims to further strengthen its R&D, expand export channels, and reinforce its position in both high‑end insulation lamination and fiber - based industrial materials. With a robust legacy and diversified operations, the company is poised to continue supporting industrial clients with reliable, high‑performance insulation solutions.
For technical information or business inquiries, contact us at yilong@yilonginsulation.com.
Epoxy Glass Fiber Pipes have become essential structural and insulating components across electrical engineering, petrochemical installations, municipal piping systems, and industrial manufacturing. With the increasing demand for lightweight, corrosion-resistant, and high-strength composite pipes, manufacturers continue to refine production technologies to deliver superior performance and reliability. Today, the industry generally recognizes three major production processes for Epoxy Glass Fiber Pipes: the reciprocating filament winding process, the continuous filament winding process, and the centrifugal casting process. Each method offers unique advantages depending on the application environment, mechanical requirements, and production scale. As a trusted manufacturer of composite insulation materials, YILONG provides technical insight into these processes to help customers select the most appropriate solution for their projects.
Epoxy Fiberglass Tubes and Rods are essential insulating components used in electrical equipment, transformers, motors, composite structures, and high-strength mechanical assemblies. Their superior mechanical strength, dielectric performance, and moisture resistance make them indispensable in modern industrial applications. As a specialist in advanced insulating materials, YILONG ensures each tube and rod is manufactured through a strict and highly controlled production process. Understanding this process also helps customers evaluate product quality and choose reliable suppliers.
Phenolic paper tubes are widely recognized as reliable insulating and structural materials across the electrical, mechanical, and industrial sectors. With their excellent balance of strength, thermal resistance, and dielectric performance, these composite tubes have become indispensable in modern electrical equipment manufacturing. As global industries continue to demand lightweight yet durable insulation materials, Phenolic paper tubes have emerged as a preferred choice due to their consistent performance, stable properties, and cost-effective manufacturing. As a specialized supplier of composite insulating materials, YILONG provides an in-depth overview of the characteristics, production process, and applications of Phenolic paper tubes.
Bakelite Sheet is a high-performance thermosetting laminate widely recognized for its durability, electrical insulation capability, and thermal stability. Produced from phenolic resin and reinforced with paper, cotton, or glass fabric, Bakelite Sheets have become indispensable in electrical, mechanical, and industrial engineering. Their combination of strength, heat resistance, and cost-effectiveness makes them one of the most reliable insulating materials in modern manufacturing.
As industries continue to demand high-performance insulating materials with superior mechanical strength and thermal stability, phenolic cotton sheets and Bakelite Sheets remain two of the most widely used options. Although both materials are based on phenolic resin systems, their compositions, performance characteristics, and ideal application scenarios differ significantly. Understanding these distinctions helps engineers, designers, and procurement specialists select the most suitable material for their projects. This article provides a clear and professional comparison, offering valuable insights for anyone involved in electrical insulation, mechanical components, or industrial manufacturing.
Bakelite may be more than 100 years old, but it remains one of the most dependable engineered materials in today’s industrial world. First formulated by Leo Baekeland in 1907, this thermosetting phenolic plastic quickly became famous for its stability, heat resistance, and excellent dielectric performance. Today, Bakelite Sheets are widely used in electrical systems, mechanical assemblies, and high-temperature environments where reliability is essential.
As global industries continue to pursue greater efficiency, safety, and sustainability, the demand for high-performance electrical insulation materials is growing rapidly. From electrical engineering and renewable energy to transportation and industrial manufacturing, insulation products are playing an increasingly critical role in enabling reliable and efficient operations. This article explores the latest development trends in electrical insulation materials and how innovative manufacturers like YILONG are positioned to meet global market needs.
As industries push toward higher safety, lightweight structures, and long-term reliability, epoxy fiberglass tubes - often known as FRP tubes or epoxy glass fiber reinforced tubes - have become essential in electrical insulation, structural engineering, and mechanical reinforcement. Many engineers and buyers ask the same question: How strong is an epoxy fiberglass tube? This article explores the material’s strength, characteristics, applications, performance parameters, and why epoxy fiberglass tubes continue to gain market attention across global industries.
As industries worldwide continue to advance toward higher efficiency and greater reliability, demand for lightweight yet ultra-strong materials is rising sharply. Among the high-performance polymer composites, Carbon Fiber Reinforced PEEK Sheets (CF-PEEK sheets) have emerged as one of the most sought-after materials due to their exceptional mechanical properties, chemical resistance, and stability under extreme conditions. This article provides an overview of CF-PEEK sheets, covering their characteristics, key parameters, applications, market outlook, and the advantages offered by YILONG’s carbon fiber PEEK products.
Nylon Boards and Bakelite Boards are two widely used materials in the insulation industry. Although both serve as effective electrical insulators, they differ significantly in composition, performance, and suitable applications. Understanding these differences helps engineers, buyers, and manufacturers select the right insulation material based on operating temperature, mechanical requirements, and environmental conditions.
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