**Electrostatic skeleton** is a composite filtering material that integrates an electrostatic charge with a reinforced supporting structure. It retains the advantages of electrostatic adsorption while providing excellent stiffness, flatness, and shape stability, making it suitable for direct pleating, laminating, or standalone use as a core support layer in high-efficiency filters. **Key Functions:** - Acts as a **structural carrier** for filter media, preventing collapse and maintaining airflow channels. - Combines electrostatic adsorption with mechanical filtration to enhance overall efficiency and service life. **Application Areas:** 1. **Support layer in high-efficiency air/liquid filter cartridges**, such as HEPA filters and industrial filter bag liners. 2. **Base material for pleated filter elements** used in ventilation systems and cleanrooms. 3. **Skeleton layer in composite filter media**, combined with meltblown or glass fiber materials for medical protection and precision filtration. 4. **Structural filtration layer in automotive or household filters**, offering low resistance and extended durability.