- Author
- Yanai, E. | Suzuki, T.
- Title
- Ignitability and Flammability of the Drop Curtains by Stage Illunination Lights.
- Journal
- Report of National Research Institute of Fire and Disaster, No. 86, 1-10, September 1998
- Keywords
- curtains | ignition | flammability | flame retardant treatments | experiments | flame spread
- Abstract
- ONLY ABSTRACT IN ENGLISH Flame retardant treated drop curtains in theatres were heated by stage illumination light resulting in fires. For investigating the mechanism of the tires, experiments were done to examine ignitability and flammability of the drop curtains by the stage illumination lights. As the results of experiments, the following were obtained. (1) The lights are arranged in order of ignition hazard as follows: Perlight (lkW), Fresnel lens spotlight (l.5kW), low horizontal light (0.5kW). (2) In order of ignitability as follows: FR cotton > FR rayon > untreated cotton > polychlal. Here, FR stands for flame retardant. (3) The results of burning experiments depended on sample thickness which is controlled number of sheets. When number of sheets is one or two, flame spread was not observed even in the case where the distance between the outlet of light and the sample surface is zero. When number of sheets is more than four, flame spread to the upper end was observed. (4) Ignitability of FR cotton is larger than that of untreated cotton. Maximum ignition distance FR cotton is smaller than that of untreated cotton. But flame spread of FR cotton is small than that of untreated cotton. (5) Flammability of polychlal is the lowest. Polychlal was ignited, but flame spread was observed even in the most hazardous condition (the distance between the outlet of perlight and the sample surface is zero).