Melting Behaviour R118a7
Laboratory
TEST
TO DETERMINE THE MELTING BEHAVIOUR OF MOTOR VEHICLE MATERIALS WITH
A METHOD ACCORDING TO APPENDIX
7 OF REGULATION NO. 118 EKG
Principle of the method.
Four samples, for both
faces shall undergo the test. A sample is placed in a horizontal
position and is exposed to a
heat flux of 30kW/m2
for 5 minutes. A
receptacle is positioned under the specimen to collect the resultant
drops.
Stand
for determining the melting
behaviour of motor vehicle materials
At the time of the test, the time of
the cotton wool from the falling burning droplets of molten material
is determined. Some
cotton wool is put in this receptacle in order to verify if any drop
is flaming. The test
result is considered satisfactory if, taking into account the worst
result, precipitation flaming drop the incendiary cotton fibre is not
formed.
Test
samples.
The test samples
shall measure: 70x70mm. Samples shall be taken in the same way
from finished products, when the shape of the product permits. When
the thickness of the product is more than 13mm, it shall be reduced
to 13mm by a mechanical process applied to the side which does not
face the respective compartment (interior, engine or separate heating
compartment). Composite
materials shall be tested as if they were of uniform construction. In
the case of materials made of superimposed layers of different
composition which are not composite materials, all the layers of
material included within a depth of 13mm from the surface facing
towards the respective passenger compartment (interior, engine or
separate heating compartment) shall be tested individually. If
the two faces of the material differ, both faces must be tested,
which means that eight samples are to be tested. The
total mass of the sample to be tested shall be at least 2g. If the
mass of one sample is less, a sufficient number of samples shall be
added.
Applying
research methods – motor
vehicle (requirements according to Regulation
no. 118 EKG
Appendix 7