Research on Flaming Droplets/Particles of d₀ Grade for B₁ Flame-Retardant Cables

In response to technical difficulties in design and manufacturing process of B₁ flame-retardant cables, especially in achieving requirements of flaming droplets/particles of d₀ grade in GB 31247—2014. Manufacturing process of B₁ flame-retardant and flaming droplets/particles cables (abbreviated as B₁/d₀ flame-retardant cables)of d₀ grade was systematically analyzed and optimized by studying sheath materials, cable structures, production processes, and other aspects. Results showed that selection of sheath materials with excellent combustion shelling and self-extinguishing properties, selection of cable auxiliary materials, and strict control of production process had a certain impact on flaming droplets/particles of d₀ grade, with could provide reference for cable enterprises in development and manufacturing process of B₁/d₀ flame-retardant cables.