1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Determination of fogging characteristics of trim materials in the interior of automobilesICS 43.040
2、.60; 59.080.40Rubber- or plastics-coated fabrics BRITISH STANDARDBS ISO 6452:2007BS ISO 6452:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2007 BSI 2007ISBN 978 0 580 57046 9Amendments issued since publicationAmd. No. Date Comme
3、ntscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 6452:2007.The UK participation in its preparation was entru
4、sted to Technical Committee TCI/69, Footwear, leather and coated fabrics.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 6452:2007(E)INTERNATIONAL STAN
5、DARD ISO6452Second edition2007-06-01Rubber- or plastics-coated fabrics Determination of fogging characteristics of trim materials in the interior of automobiles Textiles revtus de caoutchouc ou de plastique Dtermination des caractristiques dembuage des matriaux de garnissage utiliss dans lhabitacle
6、automobile BS ISO 6452:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Principle. 1 4 Materials 2 5 Apparatus 2 6 Test pieces and test samples 4 7 Conditioning 5 8 Procedure 5 8.1 Cleaning. 5 8.2 Control tests 5 8.3 Arrangement of test pieces and test samples . 6 8.4 Mea
7、surements prior to the fogging test. 6 8.5 Fogging test 6 9 Expression of results . 7 10 Precision 8 11 Test report . 8 Annex A (informative) Precision results 9 Annex B (informative) Guidance on using precision results. 10 Annex C (normative) DIDP reference liquid . 11 Bibliography . 12 BS ISO 6452
8、:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for w
9、hich a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all
10、 matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are c
11、irculated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held resp
12、onsible for identifying any or all such patent rights. ISO 6452 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 4, Products (other than hoses). This second edition cancels and replaces the first edition (ISO 6452:2000), which has been technically revised. B
13、S ISO 6452:20071Rubber- or plastics-coated fabrics Determination of fogging characteristics of trim materials in the interior of automobiles WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safe
14、ty problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1 Scope This International Standard specifies a test method which is intended to determine the fog
15、ging characteristics of rubber- or plastics-coated fabrics that are used as trim materials in the interior of motor vehicles. The method may also be applicable to fluid, pasty, powdered or solid raw materials which are the basis for such trim materials or from which the materials are manufactured. T
16、he method may also be applicable 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 will not measure or cannot measure accurately those cases in which: the surface tension of
17、 the condensate is low, resulting in early coalescing into a thin transparent film; 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 r
18、eferences The following referenced documents are indispensable for the application 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/TR 9272, Rubber and rubber products
19、 Determination of precision for test method standards 3 Principle A test piece 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 reflectometer v
20、alue for the glass plate with fogging condensate and the reflectometer value of the same glass plate without fogging condensate. The mass of the condensable constituents G is given by the difference between the masses of the aluminium foil disc with and without fogging. BS ISO 6452:20072 4 Materials
21、 4.1 Thermal-transfer fluid, for the thermostatically controlled bath (5.1). The fluid shall be temperature-stable and preferably water-soluble for easier cleaning. A suitable fluid is a modified polyhydric aliphatic alcohol. 4.2 Glass-cleaning detergent, of a non-alkaline type. 4.3 Diisodecyl phtha
22、late (DIDP), obtained from the stated source (see Annex C). 5 Apparatus 5.1 Thermostatically controlled bath, designed to operate at up to 130 C. Safety devices shall be fitted to prevent overheating. The circulation system, the bath capacity and the heating system shall be such that the temperature
23、 can be kept constant to within 0,5 C throughout the bath. The agitation of the bath 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/circulato
24、rs have a centrifugal pump in the bottom, pumping the liquid at high speed around the bath. The beakers (5.3) will then have the liquid passing them at different speeds and this will cause different temperatures in different beakers. The bath shall be designed so that, after placing the beakers (5.3
25、) in the bath, the temperature does not drop more than 5 C, and the test temperature is regained after no more than 20 min. 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 shall be equipped with a device indicat
26、ing the distance between the bath fluid and the lower surface of the glass plate (5.6). This distance shall be (60 2) mm. 5.2 Cooling plates, designed to be placed on the glass plates (5.6) to keep them cool. The cooling plates shall be hollow and made of corrosion-resistant metal, with the side fac
27、ing the glass plate made of aluminium. They shall have two cooling-water connections located so that the cooling water flows through the whole of the interior of the plate. The surface in contact with the glass plate shall be flat. The mass of a cooling plate filled with water shall be at least 1 kg
28、, to overcome the buoyancy of the beaker (5.3) in the bath. The whole of the weight of the cooling plate shall rest on the beaker. A separate cooling plate shall be used for each beaker. The cooling plates and the associated water thermostat shall be designed so that the mean water temperature is 21
29、 C and the difference in temperature between the inlet and outlet does not exceed 1 C. 5.3 Flat-bottomed beakers, of heat-resistant glass, minimum mass 400 g, with the dimensions shown in Figure 1. 5.4 Metal rings, external diameter 80 mm, internal diameter 74 mm, height 10 mm and mass (55 1) g, mad
30、e of corrosion-protected steel, to keep the test pieces flat. 5.5 Sealing rings, of silicone- or fluoro-rubber, L-shaped or circular in cross-section, inner diameter 90 mm to 95 mm, thickness 2 mm to 4 mm and hardness 50 IRHD to 70 IRHD. 5.6 Float-glass plates, of residential or windshield window qu
31、ality, for condensation of the fogging, thickness (3 0,2) mm, either square with minimum dimensions of (110 110) mm or circular with a diameter of 103 mm. The reflectometer values of all the plates used shall be the same to within 2 % units. The tin and non-tin surfaces of the plates shall be identi
32、fied. NOTE The tin and non-tin surfaces of the glass plates can be identified by viewing the surfaces in a darkened room under a UV light at 254 nm wavelength. The tin surface will fluoresce when it is exposed to the UV light. BS ISO 6452:20073Dimensions in millimetres aGround. Figure 1 Glass beaker
33、 5.7 Filter paper, with a diameter of 110 mm and a mass per unit surface area of 90 g/m2. 5.8 Aluminium foil discs, thickness 0,03 mm, diameter (103 1) mm. Store the prepared aluminium foil discs in a desiccator (5.14) to avoid condensation and contamination. 5.9 Reflectometer, with a 60 incident be
34、am and 60 measurement beam. BS ISO 6452:20074 5.10 Spacer, designed to prevent contact with the condensate on the glass plate during reflectometer measurements, made of a suitable material such as paper or plastic with a circular hole for the measurements. The thickness of the spacer shall be (0,1 0
35、,02) mm (see Figure 2). Dimensions in millimetres Figure 2 Spacer on top of glass plate 5.11 Dishwasher, preferably connected to a deionized-water supply and capable of being operated at 80 C. 5.12 Balance, with scale divisions of 0,01 mg. 5.13 Polyethylene gloves. 5.14 Desiccator, with suitable dry
36、ing material. 6 Test pieces and test samples In the case of finished products, cut circular test pieces with a diameter of (80 1) mm from the sample. The thickness of the test pieces can be up to 10 mm. Machine thicker materials on the underside to 10 mm (the underside is the side facing away from t
37、he side which is visible in the vehicle). If other test piece dimensions are required, these may be as given in the product specification or as agreed between the interested parties. In the case of powdered, pasty or fluid materials, take a test sample of (10 0,1) g. Take two test pieces or test sam
38、ples for the determination of the fogging value F and another two for the determination of the mass of the condensable constituents G. BS ISO 6452:200757 Conditioning Unless otherwise specified, condition all test pieces and test samples at 23 C and 50 % RH for at least 16 h. Foamed materials and co
39、ated fabrics shall be conditioned by drying in accordance with Table 1 in a desiccator over phosphorus pentoxide (or silica gel) on a carrier, without the use of a vacuum. Table 1 Drying times Material Drying time days Foamed materials 1 Coated fabrics 2 Materials with a high water content (e.g. lea
40、ther) 7 8 Procedure 8.1 Cleaning 8.1.1 General Only touch the beakers (5.3) on the outer surfaces. Do not touch the glass plates (5.6) or the metal rings (5.4) with bare hands; use gloves (5.13) or tongs. After the glass plates have been cleaned and dried, make a visual check that the plates are fre
41、e of scratches and other defects; if they are not, discard them. After cleaning, store all items, the beakers upside-down, in a dust-free environment at room temperature until the measurements are made. 8.1.2 Cleaning with a dishwasher Wash the sealing rings (5.5), beakers and metal rings twice in a
42、 dishwasher (5.11) with glass-cleaning detergent (4.2). If the dishwasher is not connected to a deionized-water supply, rinse the cleaned equipment in deionized water. Prior to each use, clean all glass plates twice in the dishwasher at 80 C using a glass-cleaning detergent. If the dishwasher is not
43、 connected to a deionized-water supply, rinse the cleaned glass plates in deionized water at room temperature and dry them in an upright position. It is recommended that the glass plates are not reused more than a few times, since microscopic scratches may affect the rate of deposition of any vapour
44、s and hence the reproducibility of the method. Discard any glass plates that have surface scratches or abraded spots. NOTE Tests have shown that it is very important to use a neutral or acid detergent as alkaline detergent affects the glass surface and the reflectrometric fogging value increases. 8.
45、2 Control tests In parallel with every fogging test, carry out a control test to determine the fogging value F of the reference liquid DIDP. For this purpose, add (10 0,1) g of DIDP to a beaker, taking care not to moisten the inner wall of the beaker. Place the beaker with the DIDP in the bath (5.1)
46、, using a different position for each test. After the test period of (180 3) min at the bath temperature of (100 0,5) C, the fogging value shall be within 3 % units of the value stated on the bottle. If this is not the case, check the test conditions. BS ISO 6452:20076 Carry out the same procedure w
47、ith DIDP when determining the mass of the condensable constituents G. After the test period of (16 0,2) h at the bath temperature of (100 0,5) C, the mass of the condensable constituents shall be within 0,25 mg of the value stated on the bottle. If this is not the case, check the test conditions. NO
48、TE 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 with DIDP and a higher test result. 8.3 Arrangement of test pieces and test samples Insert the test pieces into beakers (one test piece per beaker). Do not touch the
49、 test pieces with bare hands. Place the test pieces so that the visible side, i.e. the side facing the vehicle interior, faces upwards. 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 sample, uniformly distributing it over the bottom of the inside of the beaker. 8.4 Measurements prior to the fogging test When reflectometric values are to be determined, calibrate the reflectomet
