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U

UL 94

UL 94 is a method used to determine the different flammability classes of plastics. The following classes are differentiated:

  • HB: a horizontally positioned sample burns off slowly
  • V-2: a vertically positioned sample expires within 30 seconds
  • V-1: as V-2, but no burning drops of plastic melt allowed
  • V-0: like V-1, but the flame quits within 10 seconds

The UL test mark is awarded by the American company Underwriters Laboratories®. UL certification means that representative samples of the product have been tested and evaluated and have met UL requirements. Further information is available at www.ul.com.

 
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