MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202521113973 A) filed by Aberdare Technologies Private Limited on November 19, 2025, for Low-Cost Flame-Retardant And Fire-Resistant Central Tube Optical Cable Based On Mica Tape.
Inventors include Huai, Yexing; Lu, Guoqing; Song, Zhenxu; Chen, Long; Wu, Laiqiang; Gu, Wenwei; Satpute, Shankar; Gaikwad, Swapnil; Bera, Pabitra; Paswan, Diwakar; and Jadhav, Vishal.
The application for the patent was published on July 31, 2026, under issue no. 31/2026.
Abstract: The present disclosure provides a low-cost flame-retardant and fire-resistant central tube optical cable (100) based on mica tape. The optical cable (100) comprises an optical fiber unit (102) enclosed within a central loose tube (106) made of polybutylene terephthalate (PBT) and filled with water-blocking fiber paste (104). A composite flame-retardant layer (108), including an inner fire-resistant mica tape layer (108-1) reinforced with single-sided glass fiber cloth and an outer halogen-free flame-retardant tape layer (108-2), is tightly wrapped around the central loose tube (106). Non-metallic reinforcement (110), such as aramid or high-modulus glass fiber yarn, is applied over the composite layer to provide tensile strength and maintain dielectric properties. An outer sheath (112) made of low-smoke halogen-free flame- retardant polyolefin (LSZH) encloses the structure. The present disclosure achieves superior flame resistance, mechanical flexibility, and cost efficiency, meeting IEC 60332 and IEC 60331 standards for flame and fire resistance.
Disclaimer: Curated by HT Syndication.
