GB/T 5455: GB/T 5455 (垂直燃烧试验)
A Chinese standard for determining the burning behaviour of textiles using the vertical flame test. A specimen is exposed to a flame for a set time, and afterflame time, afterglow time and char length are recorded. For zippers the test supports flammability requirements on tapes and coatings, especially for protective products and products for children. Results depend on fibre type, finish and construction, so specimens are conditioned and tested under controlled conditions.