ISO 6452 pdf free download

ISO 6452-2021 pdf free download.Rubber – or plastics-coated fabrics一Determination of fogging characteristics of trim materials in the interior of automobiles.
This document specifies a test method which is intended to determine the fogging characteristics of rubber- or plastics-coated fabrics that are used as trim materials in the interior of motor vehicles.
The method can also apply to fluid, pasty, powdered or solid raw materials which are the basis for such trim materials or from which the materials are manufactured. The method can also apply to other materials and finished products.
The procedure is applicable to the measurement of fog condensate on glass surfaces within the limits of the test conditions. This test cannot measure accurately those cases in which:
— the surface tension of the condensate is low, resulting in early coalescing into a thin transparent Iii m;
— the condensate is present in such a large quantity that the droplets coalesce and form a heavy oily! clear film (this heavy film gives false readings).
In such cases, the gravimetric method is preferred.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2813, Paints and varnishes — Determination of gloss value at 20°, 60° and 85°
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www .org/obp
— IEC Electropedia: available at http(www.c1vctropedia.org/
4 Principle
A test piece or portion is heated in a glass beaker. Any volatile constituents are condensed on either a cooled glass plate or a disc of cooled aluminium foil.
The fogging value F is calculated as the quotient, in percent, of the gloss value for the glass plate with fogging condensate and the gloss value of the same glass plate without fogging condensate. The gloss values are measured in accordance with ISO 2813.
The mass of the condensable constituents G is given by the difference between the masses of the aluminium foil disc before and after fogging.
5 Materials
5.1 Thermal transfer fluid, liquid or air, for the thermostatically controlled bath or chamber (J.).
The fluid shall be temperature-stable and preferably water-soluble for easier cleaning. A suitable fluid is
a modified polyhydric aliphatic alcohol or air.
5.2 Glass-cleaning detergent, of a non-alkaline type.
5.3 Reference liquid, diisodecyl phthalate (DIDP)’).
6 Apparatus
6.1 Thermostatically controlled bath or chamber, designed to operate at up to 13u C. Satety devices shall be fitted to prevent overheating. The circulation system, the bath or chamber capacity and the heating system shall be such that the temperature can be kept constant to within ± 0,5 °C throughout the bath or chamber. The agitation of the bath or chamber shall be done at a slow and uniform speed.
NOTE 1 It is very important to keep the temperature correct, as tests have shown that only a 0,5 °C difference can be seen in the test results.
NOTE 2 Some heaters/circulators have a centrifugal pump in the bottom, pumping the liquid at high speed around the bath. The beakers (3) will then have the liquid passing them at different speeds and this will cause different temperatures in different beakers.
NOTE 3 Comparison between air chamber and oil bath test results Is described in Annex B for reference.
The bath or chamber shall be designed so that, after placing the beakers (3) in the bath or chamber, the temperature does not drop more than 5 °C, and the test temperature is regained after no more than 20 mm. The minimum distance between the beakers and the walls shall be 30 mm and between the bottom of the bath and the beakers 60 mm.
The bath or the chamber shall be equipped with a device indicating the distance between the fluid and the lower surface of the glass plate (). This distance shall be 60 ± mm.pdf free download.