BS EN 60695-11-10 / IEC 60695-11-10 method B
BS EN 60695-11-10 / IEC 60695-11-10 method B describes a small-scale laboratory test for determining comparative burning characteristics of plastic materials using a 20mm flame in a vertical position.
Specimen: Two sets of 10 specimens with nominal dimensions 125 mm x 13 mm and thickness not more than 13mm.
Specimen conditioning: Two sets of 5 specimens per sample were conditioned as follows:
i. First set at 230C and relative humidity 50% for minimum of 48 hours.
ii. Second set in an air circulating oven for 168 hours at 700C and then cooled in a desiccator for minimum of 4 hours.
Gas flow: Set the methane gas flow to 105 ml/min. Adjust the flow and air intakes of the burner to get a clean blue flame 20mm high.
Flame application: 20mm Bunsen burner flame.
Flame application time: 2 x 10 seconds application. The second flame application time begins as soon as the ignited specimen is extinguished or immediately if the specimen does not ignite.
Measurements:
A – Duration of flaming after first flame application (seconds).
B – Duration of flaming after second flame application (seconds).
C – Duration of glowing after second flame application (seconds).
D – Whether or not specimens burn up to the holding clamp.
E – Whether or not specimens drip flaming particles which ignite cotton swatch.
Based on the measured values use the following table to classify the material as V-0, V-1 or V-2.
Test setup: The Bunsen Burner and the test specimen is set up as shown in the test schematic.
