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.
Phenolic Cotton Cloth Laminate is characterized by high mechanical strength, good moisture resistance, and satisfactory heat resistance. While its electrical properties are generally lower than those of glass fabric laminates, it offers superior machinability and toughness, making it a widely used material in electrical and mechanical applications. Grade 3025 is one of the most commonly used phenolic laminates in the electrical industry.
With a density of approximately 1.35 g/cm³, phenolic paper and cotton cloth laminates weigh roughly half as much as aluminum, making them suitable for lightweight structural applications in electrical equipment, machinery, and certain transportation industries.
Chemical Resistance
3025 Phenolic Cotton Cloth Laminate exhibits good resistance to chemical corrosion. It can withstand exposure to:
● Organic solvents
● Organic acids
● Dilute inorganic acids
This makes it suitable for a variety of industrial and chemical equipment applications. However, it is generally not recommended for long-term use in alkaline environments.
Excellent Machining Performance
Phenolic laminates can be processed using a wide range of conventional machining methods, including:
● Sawing
● Drilling
● Turning
● Milling
● Planing
● Routing
After machining, properly processed components should remain free from cracking, chipping, or delamination.
Sheets with a thickness below 3 mm can often be punched directly. Cold-punching grades can be processed without heating, while standard grades typically require preheating before punching operations.
Because of its excellent fabrication characteristics, 3025 Phenolic Cotton Cloth Laminate is widely used for manufacturing insulation components in low-voltage and medium-voltage electrical equipment, motors, and electronic devices.
Advantages of 3025
Compared with Phenolic Paper Laminate, 3025 Phenolic Cotton Cloth Laminate offers:
● Higher mechanical strength
● Better bonding strength
● Higher impact resistance
● Superior toughness
● Better machining performance
● Improved wear resistance
These characteristics make it particularly suitable for mechanically loaded insulation components and precision-machined parts.
Limitations
Although 3025 Phenolic Cotton Cloth Laminate provides excellent mechanical performance, it also has relatively higher water absorption compared with glass fabric laminates.
When exposed to moisture, its electrical insulation properties may decrease. In humid environments, prolonged moisture absorption can also promote mold growth. Therefore, it is generally not recommended for long-term use in hot and humid climates where superior moisture resistance is required.
Typical Applications
● Insulating washers
● Slot wedges
● Insulating rods
● Electrical spacers
● Terminal supports
● Low-voltage motor insulation parts
● Electrical insulation structural components
● Switchgear insulation parts
● Mechanical wear-resistant components
● Industrial fixtures and tooling
Comparison with Glass Fabric Laminates
Compared with phenolic paper laminates and Phenolic Cotton Cloth Laminates, glass fabric laminates such as G10, G11, FR4, and epoxy glass sheets provide:
● Higher mechanical strength
● Better electrical insulation performance
● Lower moisture absorption
● Superior heat resistance
● Better dimensional stability
Although flexural strength, tensile strength, and impact strength may decrease at elevated temperatures, glass fabric laminates generally maintain significantly higher performance levels than phenolic paper and cotton cloth laminates.
For applications requiring higher operating temperatures, greater mechanical loads, or improved electrical insulation reliability, glass fabric laminates are often the preferred choice.
YILONG supplies high-quality 3025 Phenolic Cotton Cloth Laminate sheets, rods, tubes, and precision CNC-machined insulation components for electrical, mechanical, and industrial applications worldwide.
www.yilonginsulation.com
yilong@yilonginsulation.com
WhatsApp: 86 15866869385
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.
If you're struggling to choose among various electrical insulation materials, this guide compares five commonly used laminated insulation sheets: 3240 epoxy sheet, FR4 Fiberglass Sheet, Bakelite Sheet, Phenolic Cotton Cloth Laminate, and Phenolic paper laminate, helping you quickly identify the most suitable material for your application.
Is your microwave oven suddenly failing to work? Are high-temperature industrial machines experiencing frequent breakdowns? In many cases, the problem may be traced back to a critical component—the mica board.
In today’s electronic era, electronic products are deeply integrated into our daily lives and are evolving at a rapid pace. It is difficult to imagine modern life without them. Epoxy glass sheets are a key insulating material widely used in electronic products. There are many types, including FR-4 Epoxy Glass Sheet, 3240 Epoxy Sheet, G11 Epoxy Glass Sheet, and G10 Epoxy Glass Sheet, each designed to meet different application requirements. Among them, G11 Epoxy Glass Sheet is considered one of the higher-performance materials, and it is important to understand its characteristics before use.
YILONG provides high-quality epoxy glass laminates widely used as engineering insulation materials. Among them, G10 Epoxy Glass Sheet and G11 are two commonly referenced grades in electrical and industrial applications. Although they share similar base structures, their performance and working environments differ due to material composition and manufacturing variations.
Material selection in engineering and manufacturing plays an important role in product performance and service life. Epoxy glass sheets have become a preferred material in many applications due to their excellent electrical insulation and mechanical properties. In particular, the G10 Epoxy Glass Sheet stands out in high-performance applications thanks to its outstanding durability and reliability.
Phenolic Cotton Laminate is a widely used thermoset composite material manufactured by impregnating cotton fabric with phenolic resin and curing under controlled heat and pressure. It is designed to deliver reliable mechanical strength, electrical insulation performance, and machining stability for industrial environments requiring durable structural materials.
No.3, Mianzhi Street, Zhucheng, Shandong, China
Copyright © 2026 by Qingdao Yilong Insulation Material Company Limited All Rights Reserved
