Overview
Insulation shielding modified material is a specialized polymer compound designed for electrical applications where both insulation and electromagnetic shielding are required. This material is engineered to provide superior dielectric properties while simultaneously offering effective electromagnetic interference (EMI) shielding. Developed primarily for the power transmission industry, these materials have become increasingly important in modern electrical systems where signal integrity and safety are paramount. The modified formulation typically combines base polymers with conductive fillers and other additives to achieve the desired electrical properties.
Physical and Chemical Properties
The material exhibits excellent dielectric strength, typically in the range of 20-30 kV/mm, making it suitable for medium to high voltage applications. Its volume resistivity is usually maintained above 10^14 Ω·cm to ensure proper insulation. Thermal properties are carefully balanced, with heat deflection temperatures commonly between 100-150°C. The material maintains dimensional stability across a wide temperature range, which is crucial for electrical applications subject to varying environmental conditions.
Main Applications
Primary use is in power cable construction, particularly for medium and high voltage cables where both insulation and shielding layers are required. The material serves as both the insulation layer and the semi-conductive shielding layer in some cable designs. Other applications include electrical connectors for sensitive equipment, busbar insulation in power distribution systems, and components in high-voltage switchgear. The material's EMI shielding properties make it valuable in applications where electrical noise suppression is critical.
Safety and Storage
While generally safe to handle at room temperature, proper ventilation is recommended when processing at elevated temperatures as some formulations may release volatile compounds. Storage should be in original packaging in a dry environment below 30°C. Moisture absorption can affect processing characteristics, so many formulations include desiccant packages when shipped. Shelf life is typically 12-24 months when stored properly.
B2B Procurement Guide
When procuring insulation shielding modified material, clearly specify the required dielectric strength, volume resistivity, and shielding effectiveness (typically measured in dB). Processing parameters such as melt flow index and recommended extrusion temperatures should be confirmed. For large volume purchases, request batch consistency data and consider third-party testing for critical applications. Lead times can vary from 2-8 weeks depending on formulation complexity and order quantity. Many suppliers offer technical support for material selection and processing optimization.
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