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.
In the vast world of materials engineering, few substances hold as much significance as resins. Among these, phenolic and Epoxy Resins stand out due to their versatile applications and remarkable properties. These two types of resins are the backbone of numerous industries, from construction and automotive to electronics and aerospace, where they play crucial roles in enhancing product performance and durability.
Polytetrafluoroethylene (PTFE) is a high-performance material widely recognized for its exceptional chemical resistance, low friction coefficient, and excellent electrical insulation. Due to these properties, PTFE sheets are extensively used across industries for gaskets, seals, linings, and insulation applications. At YILONG, we supply both molded and Skived PTFE Sheets, catering to diverse customer needs with consistent quality and performance.
Mica is a naturallycurring from the silicate family, well-regarded for itsunique properties including thermal stability, dielectric strength, and its ability to be split into thin, flexible sheets. Due to these characteristics, mica is widely utilized across many industries—from electronics and automotive to construction and energy. At YILONG, we specialize in providing mica-based insulation products for high-performance applications where reliability under heat and voltage stress is crucial.
Selecting the right Electrical Insulation material has a direct impact on system performance, safety, and service life. Understanding the properties and applications of various insulation materials helps engineers and manufacturers make informed decisions tailored to their specific needs.
Insulation sheets are multifunctional materials widely used across industries due to their excellent thermal, electrical, and acoustic insulation properties. With low thermal conductivity, high dielectric strength, and reliable sound absorption, they offer dependable solutions for energy efficiency, system safety, and noise control.
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 .
Today, thermosetting resins are typically produced in smaller volumes than thermoplastic resins and often play a supporting role in the materials industry. However, did you know that the first synthetic resin ever invented was not a thermoplastic, but a thermosetting resin called bakelite?
FR-4, the widely used epoxy glass cloth laminate, is well known for its excellent mechanical strength, flame resistance, and electrical insulation. While most people associate FR-4 with the typical green color seen in printed circuit boards (PCBs), FR-4 is actually available in several different colors, including yellow, white, black, and natural (light green or beige). But what do these colors really mean?
FR-4, G10 and G11 are all thermoset materials widely used in the electronics and electrical engineering industries for their properties and performance.
G-10 is a high-performance glass epoxy composite that has become indispensable across a wide range of industries due to its exceptional strength, durability, and resistance to environmental factors.
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