Behind the reliable operation of electrical equipment, industrial machinery, renewable energy systems, and modern electronic devices lies a critical yet often overlooked component—insulation materials.
From power distribution systems and electrical motors to automation equipment and high-performance industrial applications, insulation materials play a vital role in ensuring electrical safety, mechanical reliability, thermal stability, and long-term operational efficiency.
As industries continue to evolve toward higher performance, greater precision, and increased safety standards, selecting the right insulation material supplier becomes more important than ever. YILONG INSULATION is committed to providing high-quality insulation materials and precision-machined components that help customers build safer, more reliable, and more efficient products.
Qingdao YILONG INSULATION Insulation Materials Co., Ltd. is a professional supplier and manufacturer specializing in electrical insulation materials, engineering plastics, and custom CNC-machined components.
With years of industry experience, YILONG INSULATION has established itself as a trusted partner for customers in the electrical, electronics, power generation, industrial equipment, transportation, and renewable energy sectors. Our products are exported to customers worldwide, including Europe, North America, South America, Southeast Asia, the Middle East, and Oceania.
Driven by the principles of quality, innovation, and customer satisfaction, YILONG INSULATION continuously develops reliable material solutions to meet the changing demands of modern industries.
YILONG INSULATION offers a complete range of insulation materials and engineering plastics, supported by advanced manufacturing and precision machining capabilities.
l 3240 Epoxy Glass Cloth Laminated Sheet
l FR4 Fiberglass Sheet
l G10 Epoxy Glass Laminate
l G11 High-Temperature Epoxy Glass Laminate
l Phenolic Paper Laminated Sheet
l Phenolic Cotton Cloth Laminated Sheet
l Bakelite Sheet
l SMC Insulation Sheet
l GPO-3 Polyester Glass Laminate
l Mica Sheet
l Epoxy Glass Rods
l Phenolic Cotton Cloth Rods
l Nylon Rods
l PE Rods
l PP Rods
l Engineering Plastic Profiles
l Custom Insulation Components
l Precision Milling
l CNC Turning
l Drilling
l Routing
l Cutting
l Slotting
l Threading
l Custom Fabrication According to Drawings or Samples
Our machining services allow customers to obtain finished components ready for assembly, reducing production time and improving supply chain efficiency.
YILONG INSULATION products are widely used in:
l Electrical Equipment
l Power Distribution Systems
l Transformers
l Electric Motors and Generators
l Switchgear and Control Cabinets
l PCB Manufacturing
l Industrial Automation Equipment
l Rail Transportation
l Renewable Energy Systems
l Wind Power Equipment
l Solar Energy Applications
l New Energy Vehicle Components
l Mechanical Equipment Manufacturing
l Industrial Tooling and Fixtures
Our insulation materials are designed to deliver excellent electrical insulation performance, mechanical strength, dimensional stability, and long-term reliability in demanding operating environments.
Our experienced team assists customers in selecting the most suitable material based on application requirements, operating environment, performance specifications, and budget considerations.
Whether you require standard materials or custom-machined components, YILONG INSULATION provides tailored solutions according to customer drawings, specifications, or samples.
Every production stage is carefully monitored to ensure consistent quality, dimensional accuracy, and compliance with customer requirements.
From inquiry to delivery and after-sales support, our team responds promptly and works closely with customers to ensure a smooth purchasing experience.
At YILONG INSULATION, we believe that high-quality insulation materials are the foundation of reliable equipment, while professional service is the key to long-term cooperation.
Our goal is not only to supply products but also to provide practical solutions that help customers improve performance, reduce costs, and enhance reliability.
Whether you are a distributor, manufacturer, engineering contractor, or OEM customer, YILONG INSULATION is ready to support your business with dependable materials, precision machining, and dedicated service. We look forward to building successful partnerships with customers around the world.
WhatsApp: 86 15866869385
Behind the reliable operation of electrical equipment, industrial machinery, renewable energy systems, and modern electronic devices lies a critical yet often overlooked component—insulation materials.
Mica Board is manufactured by bonding mica paper with organic silicone adhesive, followed by heating and hot pressing. It is a high-performance electrical insulation and thermal insulation material. The available colors are typically gold and white.
Mica Paper is widely recognized as a “core material” in high-temperature electrical insulation applications. With its outstanding thermal resistance, electrical insulation performance, and stable chemical properties, it plays a critical role in modern electrical, industrial, and high-tech engineering systems.
In the field of non-standard component manufacturing, material selection often defines the performance limits and application scope of the final product. As a high-performance electrical insulation material, Mica Board is bringing breakthrough solutions to custom-engineered parts across multiple industries due to its outstanding heat resistance, electrical insulation performance, and mechanical stability.
Epoxy Glass Sheet is manufactured using electronic-grade alkali-free fiberglass fabric impregnated with epoxy resin and other modified materials, followed by high-temperature and high-pressure lamination. Epoxy Glass Sheets feature excellent electrical insulation, flame retardancy, high temperature resistance, and strong mechanical performance.
FR-4, which we commonly refer to in the PCB industry, is not actually a specific material name. It is a flame-retardant grade designation.
Phenolic Cotton Cloth Laminate is manufactured by impregnating cotton fabric with phenolic resin, followed by curing under heat and pressure. It is classified as a Thermal Class E insulating material and provides excellent mechanical properties, oil resistance, and reliable dielectric performance.
Epoxy Sheets are widely used in electrical and electronic applications due to their excellent combination of heat resistance, corrosion resistance, wear resistance, light weight, and electrical insulation properties.
Bakelite sheet, also known as Phenolic Paper Laminated Sheet, is manufactured using high-quality bleached wood pulp paper and cotton linter paper as reinforcing materials. These substrates are impregnated with phenolic resin produced from high-purity synthetic petrochemical raw materials and then processed through heat and pressure lamination.
Electrical resistance is the reciprocal of conductance, and resistivity refers to the resistance per unit volume of a material. The lower the conductivity of a material, the higher its resistance. For Electrical Insulation Materials, higher resistivity is always preferred. A higher resistivity indicates better insulation performance and lower leakage current under electrical stress.
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