Blog - JingHong

Industry standards

The Complete Guide to FR4 Sheet in 2025

James Yang

Jun 5, 2025

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Glass Fiber Series

What's the Difference between G10 and FR4?

James Yang

Jun 17, 2025

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Market Analysis

The Development History of Insulating Materials

The journey of insulating materials stretches back centuries, evolving from rudimentary natural substances to sophisticated, high-performance solutions that power modern industries. This fascinating progression began with early civilizations harnessing materials like wood, straw, and animal hides to shield against environmental extremes. As scientific understanding deepened, the Industrial Revolution ushered in a wave of innovation, introducing substances like rubber and early ceramics to meet burgeoning electrical demands. The 20th century marked a pivotal era, with synthetic polymers and advanced composites revolutionizing insulation technology. Today, cutting-edge insulating materials, such as aerogels and nanotechnology-enhanced sheets, dominate global markets, catering to diverse sectors from energy to aerospace. This rich history underscores the relentless pursuit of efficiency, safety, and sustainability in insulation advancements.

James Yang

Jun 12, 2025

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Glass Fiber Series

How Hot Press Machines Ensure Void-Free G10 Epoxy Sheets?

James Yang

Apr 14, 2026

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Glass Fiber Series

The Role of 3240 Epoxy Sheets in High-Voltage Transformers

James Yang

Apr 14, 2026

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Phenolic Series

Bakelite Sheet Applications in Vintage Electronics and Audio Gear

Caroline Jia

Apr 14, 2026

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Glass Fiber Series

Troubleshooting Delamination in 3240 Epoxy Sheet Drilling

When we machine 3240 epoxy sheet materials, one of the most persistent problems we run into is delamination during drilling operations. The insulation laminate is made of woven glass fabric that is saturated with epoxy resin. It can separate into layers at the edges of holes if the drilling parameters are wrong, the tools are worn out, or the clamps aren't tight enough. The phenomenon weakens both the mechanical integrity and the performance of electrical insulation. It causes quality problems that electrical equipment manufacturers, power equipment builders, and auto part suppliers can't afford. Drilling can be turned from a problematic process into a reliable manufacturing step that keeps the material's high dielectric strength and dimensional stability by figuring out what causes the problems and using tried-and-true solutions.

James Yang

Apr 13, 2026

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Phenolic Series

NEMA Standards Explained: CE, LE, XX, and XXX Phenolic Sheets

Caroline Jia

Apr 13, 2026

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Glass Fiber Series

Aerospace Insulation: The Critical Role of G11 Epoxy Sheets

James Yang

Apr 13, 2026

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