INSULATING SHEATH Russian patent published in 2006 - IPC H01B7/18 H01B7/02 H01B9/02 H01B3/48 

FIELD: electric insulation engineering; insulating sheaths possessing fire and heat resistance and screening effect.

SUBSTANCE: proposed insulating sheath characterized in high resistance to open flame, high temperatures up to 600 °C, acids, oil products, organic solvents, and microbiological impacts is made of threads having different composition and twisted together; one of threads is made of arimide fiber and functions as reinforcing warp, and other one is made in the form of metal thread, more than 0.018 and less than 0.020 mm thick, that functions as shielding component. Coated or non-coated metal wire is used as shielding component. Reinforcing warp can be made in the form of harness of at least two arimide threads twisted together or it may have a few pairs of arimide fiber threads and metal thread twisted together; these pairs are interwoven to form ribbon or cloth.

EFFECT: enhanced fire resistance and flexibility, reduced weight of insulating sheath.

5 cl, 1 tbl