Blog - JingHong

Glass Fiber Series

Surface Finish and Cleaning after FR4 Machining

James Yang

Sep 24, 2025

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Phenolic Series

Compare Phenolic Cotton Sheets vs Fiberglass Phenolic for Insulation

When it comes to choosing insulation materials for electrical and industrial applications, phenolic cotton sheets and fiberglass phenolic are two popular options. Both materials offer unique properties and benefits, making the selection process crucial for optimal performance. Phenolic cotton sheets, known for their excellent electrical insulation and mechanical strength, are composed of cotton fabric impregnated with phenolic resin. On the other hand, fiberglass phenolic combines glass fibers with phenolic resin, resulting in a material with high heat resistance and dimensional stability. The choice between these two materials depends on specific application requirements, environmental conditions, and desired performance characteristics. This comparison will delve into the strengths and limitations of each material, helping you make an informed decision for your insulation needs.

Caroline Jia

Sep 24, 2025

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Phenolic Series

Typical Tolerances and Thicknesses Available for Bakelite Sheets

Caroline Jia

Sep 24, 2025

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Industry standards

Compare 3240 Epoxy vs Bakelite for High-Voltage Insulation

James Yang

Sep 24, 2025

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Glass Fiber Series

How does Moisture Absorption Affect G10 Electrical Performance?

James Yang

Sep 23, 2025

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Glass Fiber Series

What Are the Typical Electrical Properties of FR4 Sheets?

FR4 sheets, widely used in printed circuit boards (PCBs), exhibit exceptional electrical properties that make them ideal for various electronic applications. These sheets boast a dielectric constant typically ranging from 4.2 to 4.8, ensuring consistent electrical performance across circuits. Their low dissipation factor, usually between 0.01 and 0.03, minimizes energy loss as signals traverse the PCB. FR4 sheets also demonstrate impressive dielectric strength, often exceeding 50 kV/mm, providing excellent insulation. Moreover, their volume resistivity, typically around 10^9 ohm-cm, contributes to their superior electrical insulation capabilities. These properties collectively make FR4 sheets a cornerstone material in the electronics industry, enabling reliable and efficient performance in diverse applications.

James Yang

Sep 23, 2025

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Glass Fiber Series

Compare FR4 Variants and When to Choose High-Tg Grades

James Yang

Sep 23, 2025

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Glass Fiber Series

Typical Electrical Insulation Limits and Dielectric Strength of G10

G10 sheet, a high-performance glass epoxy laminate, exhibits exceptional electrical insulation properties and dielectric strength, making it a cornerstone material in various electrical and electronic applications. The typical dielectric strength of G10 ranges from 800 to 1,000 volts per mil (0.001 inch), equivalent to approximately 31.5 to 39.4 kV/mm. This impressive insulation capability allows G10 to withstand substantial voltage differences without electrical breakdown. The material's low moisture absorption rate, typically less than 0.1%, further enhances its electrical performance by maintaining consistent insulation properties even in humid environments. G10's unique combination of high dielectric strength, excellent mechanical properties, and chemical resistance makes it an ideal choice for critical electrical components, circuit boards, and high-voltage insulation applications across various industries.

James Yang

Sep 23, 2025

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Glass Fiber Series

How do G10 and FR4 Compare in Electrical Insulation Performance?

G10 sheet and FR4 are both high-performance electrical insulation materials widely used in the electronics industry. While they share many similarities, their electrical insulation performance differs in subtle yet significant ways. G10 generally offers superior dielectric strength and slightly better insulation resistance, making it ideal for high-voltage applications. FR4, on the other hand, provides excellent flame retardancy and maintains good electrical properties at higher frequencies. Both materials exhibit low moisture absorption and thermal stability, contributing to their reliability in various electrical applications. The choice between G10 and FR4 often depends on specific project requirements, balancing factors such as voltage levels, operating frequencies, and environmental conditions.

James Yang

Sep 23, 2025

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