|
UL 94, the Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliances testing is a plastics flammability standard released by Underwriters Laboratories of the USA.〔(【引用サイトリンク】url=http://www.ul.com/global/eng/pages/offerings/industries/chemicals/plastics/testing/flame/ )〕 The standard classifies plastics according to how they burn in various orientations and thicknesses. From lowest (least flame-retardant) to highest (most flame-retardant), ==Classifications== *HB: slow burning on a horizontal specimen; burning rate < 76 mm/min for thickness < 3 mm or burning stops before 100 mm *V-2 burning stops within 30 seconds on a vertical specimen; drips of flaming particles are allowed. *V-1: burning stops within 30 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed. *V-0: burning stops within 10 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed. *5VB: burning stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may develop a hole. *5VA: burning stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may not develop a hole 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「UL 94」の詳細全文を読む スポンサード リンク
|