Blog - JingHong

Industry standards

The Complete Guide to FR4 Sheet in 2025

James Yang

Jun 5, 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

What's the Difference between G10 and FR4?

James Yang

Jun 17, 2025

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Glass Fiber Series

Optimizing Feed Rates for CNC Processing of 3240 Epoxy Sheets

Finding the best feed rates for CNC processing of 3240 epoxy sheet means carefully matching cutting speed, tool choice, and the properties of the material to get the best surface finishes with the least amount of tool wear and production costs. This shielding laminate is made up of electrical-grade fiberglass cloth that has been soaked in epoxy resin. It is very important in electrical insulation, switchgear parts, and transformer uses that need to be strong and stable in terms of size and shape. In the electrical manufacturing, industrial gear, and power delivery industries, engineering managers and buying teams know that optimizing feed rates correctly has a direct effect on product quality, throughput, and profits. Manufacturers can lower the number of rejects and increase the life of their tools by learning how to change the cutting settings based on the density, thermal qualities, and mechanical strength of the material. This guide gives useful advice based on 20 years of working in the industry. It helps people make decisions about how to handle the complicated technical aspects of CNC cutting while still meeting strict quality standards in B2B markets that are very competitive.

James Yang

Jul 2, 2026

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Glass Fiber Series

How Automated CNC Systems Improve G10 Sheet Production Efficiency?

Automatic CNC systems change the way G10 sheets are made by combining precise controls, robotic handling, and real-time tracking software that cuts cycle times by a large amount and improves the accuracy of the dimensions. This technology solves the special problems that come up when working with glass-epoxy composites. Previously, tool wear, the risk of delamination, and wasteful material use made it hard to get work done. Manufacturers can keep quality high while dropping costs by reducing the amount of work that needs to be done by hand and making sure that the cutting settings are perfect for the rough nature of fiberglass-reinforced laminates. As a result, the work process is more efficient and meets the strict standards needed for electrical insulation, relay parts, and high-voltage uses in many different fields.

James Yang

Jul 2, 2026

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Phenolic Series

Machining Bakelite Sheet: How to Prevent Chipping During High-Speed Milling

Caroline Jia

Jul 2, 2026

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Glass Fiber Series

How High-Pressure Laminate Presses Produce Premium FR4 Epoxy Sheets?

High-pressure laminate presses use a carefully controlled method that includes temperature, pressure, and time to turn raw prepreg materials into high-quality FR4 epoxy sheets. During production, layers of knitted fiberglass cloth that have already been mixed with epoxy resin are pressed together at several hundred PSI while being heated to temperatures that cause the resin to harden. This method gets rid of any empty spaces inside the sheet, makes sure that the resin is spread out evenly, and forms the thick molecular structure that makes FR4 epoxy sheets good. The laminates that are made have great dielectric strength, dimensional stability, and mechanical integrity, which are all important for PCB boards, electrical insulation parts, and structural supports in the industry and electronics sectors.

James Yang

Jul 1, 2026

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Phenolic Series

Waterjet Cutting vs. CNC Routing: Which is Better for Thick Phenolic Cotton Sheets?

Caroline Jia

Jul 1, 2026

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Glass Fiber Series

Why Flatness Tolerance Matters: The Precision Pressing Process of 3240 Epoxy Sheets

James Yang

Jul 1, 2026

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