How do you test UL94?
The test uses a ½” x 5″ specimen held at one end in a horizontal position with marks at 1″ and 5″ from the free end. A flame is applied to the free end for 30 seconds or until the flame front reaches the 1″ mark (see Fig. 2.1). If combustion continues the duration is timed between the 1″ mark and the 5″ mark.
What does UL94 HB mean?
Slow horizontal burn test
UL 94 V-2 Vertical Burn; Burning stops within 60 seconds, Flaming drips ARE allowed. UL 94 H-B Horizontal Burn; Slow horizontal burn test (H-B) are considered “self-extinguishing”. This is the lowest (least flame retardant) UL94 rating.
What is a UL94 rating?
UL 94 is a plastics flammability standard released by the Underwriters Laboratories (USA). The standard classifies plastics according to how they burn in various orientations and part thicknesses from the lowest flame-retardant to most flame-retardant in six different classifications. UL 94 Rating.
What is V0 testing?
Vertical Burning Test for Classifying Materials The test evaluates both the burning and afterglow times and dripping of the burning test specimen. The material will be rated: V-0: if flame extinguishes within 10 seconds with no dripping. V1: if flame extinguishes within 30 seconds with no dripping.
What is the vertical flame test?
The vertical flame resistance of a test specimen is measured according to ASTM D 6413 Standard Test Method for Flame Resistance of Textiles. Measurements are made on the length of time that the specimen continues to flame and the time afterglow continues after the flame source has been removed. …
What is horizontal burning test?
The Horizontal Bunsen Burner test is used by the aerospace/aviation industry to determine the resistance of cabin and cargo compartment materials to a flame applied for 15-seconds. It is most commonly used to show compliance with 14 CFR 25.853(a) or CAR 3.388(a).
What is UL94 v2?
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.
What is flammability rate?
The flammability rating is calculated for a test specimen as a function of the burning rate and taking account of the material thickness.
What does UL94V 0 mean?
UL94v-0 is a fire standard set by UL – an American worldwide safety consulting and certification company headquartered in Northbrook, Illinois. UL94V-0 is used to determine the flammability of a specified material and the burn time associated with it.
What is UL V0?
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.
What NFPA 701?
NFPA 701 is the most standard methods of fire tests for flame propagation of textiles and films. This test has two test methods based on fabric density.
What does NFPA 2112 mean?
NFPA 2112: Standard on Flame-Resistant Clothing for Protection of Industrial Personnel Against Short-Duration Thermal Exposures from Fire.