Test Standard |
ISO6941:1984 –Textile fabrics- Burning beh*iour-Measureme*f flame spread properties of vertically oriented specimens |
EN 533: Method EN532Protective clothing- protection against heat and flame-Limited flame spread materials and material assemblies. |
Specimens |
560mm*170mm 3 pcs in length and width direction |
200mm*160mm length and width direction |
Pretreatment |
/ |
Both original and washed sample are needed to be tested。 Washing procedure A or B : A: machine washing at 75℃ fo*cycles. Or carrying out at least 5 wash cycles as the manufacturer&rsquo*aintenance instructi*. B. Water soaking as per BS 5651:1978 and followed by 5 dry cleaning cycles. |
Flame |
Butane gas Flame applied time: 15s Flame height: 40&plu*n;2mm |
propane gas Flame applied time 10 s Flame height: 40mm |
Position of igniti*ource |
Position the burner perpendicular to the surface of the specimen such that the axis of the burner is 20mm above the line of the lower pins in line with the vertical centerline of the face of the specimen. The end of the burner is 17mm form the face of the specimen. |
Same to ISO 6941 |
Procedure |
1. Apply the flame for 15s. 2. Measure the following times and record: (1) From the start of the application of the igniting flame to the severance of the first marker thread.(S) (2) From the start of the application of the igniting flame to the severance of the second marker thread.(S) (3) From the start of the application of the igniting flame to the severance of the third marker thread.(S) (4)afterflame time(s) (5)afterglo*me(s) (6)the maximum bur*r damaged width and length. (7) whether the flame reaches*ertical edge of the specimen (8)whether or not a hole is bur*r melted in the specimen |
1.Apply the flame for 10s 2.Record: (1) Whether for any flame reaches the upper edge or either vertical edge of the test specimen (2) Whether a hole develops (3) the occurrence of flaming or molten debris (4) Whether afterglow spreads beyond the flame spread area i* the undamaged area (5) afterglame time (6) afterglo*me |
Pass or Fail Criteria |
New W*e Requirement: a. No specimen shall give flaming to the top or either side edge b. No specimen shall give hole formation c. No specimen shall give flaming or molten debris d. The mean value of afterflame time shall be =2s e. The mean value of afterglo*me shall be =2s |
Index 2: (1) No Specimen shall permit any part of the lowest boundary of any flame to reach the upper or either vertical edge. (2)No specimen shall give flaming debris. (3)Any afterglow shall not spread from the carbonized area to the undamaged area after the cessation of flaming. (4) No specimen shall give hole formation. |
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