UL 94

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. 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.
    • Loading... please wait...
    This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/UL_94

    Podcasts:

    Email this Page Play all in Full Screen Show More Related Videos
    PLAYLIST TIME:

    Two Face Have I

    by: Ol' 55

    'Two Faces Have I' lyrics
    I don't want the world to know
    I don't want my heart to show
    Two faces have I
    Yiiiiii I Yiiiii I
    I pretend that I'm happy
    But I'm Mr. blue
    I pretend that I'm happy
    Since I lost you
    Oooh
    Yiiiiiiii I Yiiii I
    I pretend that I'm carefree
    My heart and I
    I pretend that I'm carefree
    But I'm living a lie
    Oooh
    Yiiiiiii I Yiiii I
    Two faces have I
    One to laugh, one to cry
    Two faces have I
    I must be living a lie
    Yiiii I Yiii I
    I pretend tthat I'm happy
    But I'm Mr. blue
    I pretend that I'm happy
    Since I lost you
    Yiiiiiiii I Yiii I
    Two faces have I
    One to laugh, one to cry
    Two faces have I
    One to laugh, one to cry
    But I'm living a lie
    Yiiiiiii I Yiiii I
    Two faces have I
    One to laugh, one to cry
    Two faces have I
    One to laugh, one to cry
    But I'm living a lie
    Yiiiiiii I Yiiii I
    Two faces have I
    One to laugh, one to cry
    Two faces have I
    One to laugh, one to cry
    But I'm living a lie




    ×
    ×
    ×
    ×