What does UL94 V0 mean?
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. Definition of Rating.
What is V0 plastic?
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 does UL94 HB mean?
Horizontal Burn
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.
Is ABS UL94 rated?
Firewire Flame Retardant ABS. Firewire® ABS-FR is a premium UL94 V-0 rated ABS that allows for printing of functional prototypes and production parts. This material is ideal for printing electrical housings, connectors, or any part that requires thermal properties [up to 95°C] and flame retardant ABS characteristics.
What is the difference between V0 and V2?
V-2: burning stops within 30 seconds on a vertical specimen; drips of flaming particles are allowed. V-0: burning stops within 10 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed.
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 is the size of UL94 v1 v2?
UL94 V-0, V-1, V-2 FLAMMABILITY STANDARDS Specimen Length 125 mm (5 in) x Width 13 mm (0.5 in) x Thickness [typically 0.7 mm (1/32 in) or 1.5 mm (1/16 in) or 3.0 mm (1/8 in)]. Procedure 1. A total of 10 specimens (2 sets) are tested per thickness. 2.
How UL94V-0 should be tested and verified?
If the material passes and is verified by UL themselves, a material can then be used in specific applications where fire safety is of a critical nature. How UL94v-0 should be tested? Five specimens firstly need to be prepared measuring 13mm (W) x 125mm (L). Maximum thickness should be 13mm
What is the vertical burning test for UL94 VTM?
Vertical burning test for UL94 VTM-0, VTM-1 and VTM-2 rated materials. Specimen: 5″ × 1/2″ × thickness (typical thickness = 1/16″, 1/8″, 1/4″) Three specimens of each thickness are to be tested.
What should I consider when selecting a UL94V-0 silicone material?
Also when selecting a UL94v-0 silicone material you must also take into consideration the thickness as UL verification only approve to certain thicknesses. For example, a silicone sponge material may be UL94v-0 approved to a minimum thickness of 12.7mm so any thickness lower than this would not be approved to UL and cannot be used for this purpose.