ISO 6452 pdf download – Rubber- or plastics-coated fabrics -Determination of fogging characteristics of trim materials in the interior of automobiles.
6.6 Float glass plates, of residential or windshield window quality for condensation of the fogging, thickness (3± 0,2) mm, either square with minimum dimensions of (110 a 110) mm or circular with a diameter of 103 mm. The gloss values of all the plates used shall be the same to within ± 2 % units. The tin and non-tin siithces of the plate shall be identified and the identification mark shall be placed on the plate.
NOTE The tin and non•tin surfaces of the glass plate can be identified by viewing the surface in a darkened room under a UV light at 254 nm wavelength. The tin surface fluoresces when it Is exposed to the UV light
6.7 Filter paper. with a diameter of 110 mm and a mass per unit surface area of 90 g/m2.
6.8 Aluminiuni foil discs, thickness 0,03 mm, dIameter (103 ± 1) mm. Store the prepared aluminium
foil disc in a desiccator (6J.) to avoid condensation and contamination.
6.9 Gloss meter, with a 60 incident beam and 60 measurement beam in accordance with ISO 2813.
6.10 Spacer, designed to prevent contact with the condensate on the glass plate during gloss meter measurements, made of a suitable material such as paper or plastic with a circular hole for the measurements. The thickness of the spacer shall he (0.1 ± 0.02) mm (see figure2).
Carry out the same procedure with DIDP when determining the mass of the condensable constituents G. After the test period of (16 ± 0.2) h at the bath or chamber temperature of (100 ± 0.5) °C, the mass of the condensable constituents shall be within 0,40 mg to 0.90 mg. If this is not the case, check the test conditions.
NOTE It Is very important not to moisten the walls of the beaker with the DIDP when handling the beaker, as this will give a larger area whit DIDP and a higher lest result.
9.3 Arrangement of test pieces and samples
Insert the test pieces or portions into beakers (one test piece or portion per beaker). Do not touch the test pieces or portions with bare hands.
Place the test pieces so that the visible side, i.e. the side facing the vehicle interior, faces upwards. If necessary to prevent rolling and warping of the test pieces, place a metal ring on each.
When testing powdered, pasty or fluid materials, use a (10±0,1) g test portions of the sample, uniformly distributing It over the bottom of the Inside of the beaker.
9.4 Measurements prior to the fogging test
When gloss values are to be determined, calibrate the gloss meter (6.2) in accordance with the manufacturer’s operating instructions. For this purpose, place a glass plate, with the non-tin side up. on a matt-white filter paper backing and place a spacer on the glass plate. Make markings on the spacer for the edges of the gloss meter. Place the gloss meter against these markings. The measurement spots shall be at a distance of (25 ± 5) mm from the centre of the glass plate Take four readings R0, to R04 with the-gloss meter aligned parallel to the plate edges (or the tangents to the plate edges in the case of circular plates), rotating the gloss meter by 900 between each reading.
Since the measured gloss meter values before and after the fogging test are to be linked in pairs, the measurement geometry shall be the same In each case. The glass plates shall therefore be marked so that they can he positioned in exactly the same way before and after the fogging test.
When the mass of the condensable constituents Is to be determined, use aluminium foil discs. Use polyethylene gloves when handling the discs. Take care not to crease the discs. A recommended method of preparing the discs is to cut theni out by stamping froni several layers of aluminium foil alternating with layers of paper edge.welded to the full. Take care to avoid contaminating the discs when cutting them out. Use the depression produced in the discs by the stamping procedure to give an improved seal with the sealing ring. Determine the mass G0 of each disc to ±0,02 mg.
9.5 Fogging test
9.5.1 Set-up
Place a sealing ring on top of each loaded beaker. For the determination of the fogging value F, place a clean glass plate, with its non•tin surface of known R1) value facing downwards, on top, covering the beaker. For the determination of the mass of the condensable constituents G, place a weighed aluminium disc (6.2). bright side downwards, on the sealing ring, followed by a clean glass plate.
Place the beakers prepared in this manner in the thermostatic bath or chamber held at (100 t 0,5) C. NOTE 1 Other temperatures can be agreed upon by the interested parties.
Place a filter paper (61) on each glass plate (to prevent scratching of the surface of the glass plate), followed by a cooling plate (6.2).
ISO 6452 pdf download – Rubber- or plastics-coated fabrics -Determination of fogging characteristics of trim materials in the interior of automobiles
