Flammability Rating

Flammability Rating is a standardized indicator that measures a material's ability to resist ignition or slow flame spread, commonly encountered in foreign trade of plastics, textiles, electronics, and electrical appliances. It is typically tested and classified by organizations such as UL (Underwriters Laboratories), IEC (International Electrotechnical Commission), and GB (Chinese National Standard), e.g., UL 94 V-0, V-1, V-2, HB, or similar grades under IEC 60695-11-10. Use cases include: customers requiring products to meet specific flammability ratings to pass safety certifications (e.g., UL, CE), serving as quality clauses in contracts, or for customs clearance and product liability insurance. Notes: ratings under different standards (UL vs IEC) are not directly equivalent; test method and thickness conditions must be confirmed; flammability rating is not the same as fire rating, which focuses more on building structures; higher ratings (e.g., V-0) cost more, so customer requirements should be clarified to avoid over-specification. Difference from 'Fire Rating': flammability rating addresses the combustibility of the material itself, while fire rating addresses the fire resistance duration of an assembled component.