Blog - JingHong

Glass Fiber Series

FR4 Sheet Export Guidelines and RoHS Compliance

James Yang

Aug 12, 2025

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Glass Fiber Series

Can 3240 Epoxy Boards Be Used Outdoors?

3240 epoxy boards can indeed be used outdoors, thanks to their exceptional weather resistance and durability. These versatile materials are engineered to withstand various environmental challenges, making them suitable for numerous exterior applications. The epoxy resin matrix, combined with fiberglass reinforcement, creates a robust composite that resists moisture absorption, UV radiation, and temperature fluctuations. This inherent resilience allows 3240 epoxy boards to maintain their structural integrity and electrical insulation properties even when exposed to harsh outdoor conditions. However, it's crucial to note that while these boards exhibit excellent outdoor performance, proper installation and periodic maintenance are essential to maximize their longevity and effectiveness in external environments.

James Yang

Aug 12, 2025

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Glass Fiber Series

How Much Heat Can FR4 Sheets Withstand?

FR4 sheets, renowned for their exceptional thermal properties, can typically withstand continuous operating temperatures of up to 130°C (266°F). This impressive heat resistance stems from the unique composition of FR4 material, which combines fiberglass reinforcement with epoxy resin. The glass transition temperature (Tg) of standard FR4 sheets ranges from 130°C to 140°C, indicating the point at which the material begins to soften and lose its rigid properties. However, it's crucial to note that short-term exposure to higher temperatures, up to about 180°C (356°F), may be possible without significant degradation. The exact heat tolerance can vary based on specific formulations and manufacturing processes, making it essential to consult manufacturer specifications for precise thermal limits in your application.

James Yang

Aug 12, 2025

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Phenolic Series

Understanding the Lamination Process of Phenolic Resin Sheets

Caroline Jia

Aug 11, 2025

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Phenolic Series

Flexural Modulus of Phenolic Resin Sheets Explained

Caroline Jia

Aug 11, 2025

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Industry standards

Understanding IEC Standards for Electrical Insulation Sheets

The International Electrotechnical Commission (IEC) standards for electrical insulation sheets serve as a crucial framework for ensuring safety, reliability, and performance in electrical systems worldwide. These standards provide comprehensive guidelines for the classification, testing, and certification of insulating materials used in various electrical applications. By adhering to IEC standards, manufacturers can guarantee the quality and consistency of their products, while end-users benefit from enhanced safety and reliability in their electrical installations. Understanding these standards is essential for anyone involved in the production, distribution, or use of electrical insulation sheets, as they form the backbone of international trade and quality assurance in the electrical industry.

James Yang

Aug 11, 2025

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Phenolic Series

Custom Thickness Phenolic Sheets for Global Supply

Caroline Jia

Aug 11, 2025

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Glass Fiber Series

Best FR4 Sheet Suppliers in China for Global Buyers - J&Q

James Yang

Aug 11, 2025

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Phenolic Series

Can Phenolic Paper Sheets Handle High Voltage Isolation?

Caroline Jia

Aug 11, 2025

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