1、BRITISH STANDARD BS ISO 6452:2007 Rubber- or plastics-coated fabrics Determination of fogging characteristics of trim materials in the interior of automobiles ICS 43.040.60; 59.080.40 BS ISO 6452:2007 This British Standard was published under the authority of the Standards Policy and Strategy Commit
2、tee on 31 July 2007 BSI 2007 ISBN 978 0 580 57046 9 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 6452:2007. The UK participation in its preparation was entrusted to Technical Committee TCI/69, Footwear, leather and coated fabrics. A list of organiz
3、ations 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 contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligatio
4、ns. Amendments issued since publication Amd. No. Date Comments Reference number ISO 6452:2007(E)INTERNATIONAL STANDARD ISO 6452 Second edition 2007-06-01 Rubber- or plastics-coated fabrics Determination of fogging characteristics of trim materials in the interior of automobiles Textiles revtus de ca
5、outchouc ou de plastique Dtermination des caractristiques dembuage des matriaux de garnissage utiliss dans lhabitacle automobile BS ISO 6452:2007 ii iii Contents 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 Cond
6、itioning 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 Measurements 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 (informati
7、ve) Guidance on using precision results. 10 Annex C (normative) DIDP reference liquid . 11 Bibliography . 12 BS ISO 6452:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internat
8、ional Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with I
9、SO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all 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 c
10、ommittees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated 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 th
11、e possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible 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 h
12、oses). This second edition cancels and replaces the first edition (ISO 6452:2000), which has been technically revised. BS ISO 6452:2007 1 Rubber- or plastics-coated fabrics Determination of fogging characteristics of trim materials in the interior of automobiles WARNING Persons using this Internatio
13、nal Standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safety 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
14、 regulatory conditions. 1 Scope This International Standard 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 may also be applicable to fluid, pasty, p
15、owdered or solid raw materials which are the basis for such trim materials or from which the materials are manufactured. The 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
16、 the test conditions. This test will not measure or cannot measure accurately those cases in which: the surface tension of 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
17、 oily/clear film (this heavy film gives false readings). In such cases, the gravimetric method is preferred. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references,
18、 the latest edition of the referenced document (including any amendments) applies. ISO/TR 9272, Rubber and rubber products 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
19、 or a disc of cooled aluminium foil. The fogging value F is calculated as the quotient, in percent, of the reflectometer value 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 giv
20、en by the difference between the masses of the aluminium foil disc with and without fogging. BS ISO 6452:20072 4 Materials 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 f
21、luid is a modified polyhydric aliphatic alcohol. 4.2 Glass-cleaning detergent, of a non-alkaline type. 4.3 Diisodecyl phthalate (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
22、to prevent overheating. The circulation system, the bath capacity and the heating system shall be such that the temperature 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 temperatu
23、re 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 (5.3) will then have the liquid passing them at different speeds and this
24、 will cause different temperatures in different beakers. The bath shall be designed so that, after placing the beakers (5.3) 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 wall
25、s shall be 30 mm and between the bottom of the bath and the beakers 60 mm. The bath shall be equipped with a device indicating 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
26、plates (5.6) to keep them cool. The cooling plates shall be hollow and made of corrosion-resistant metal, with the side facing 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
27、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, 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 eac
28、h beaker. The cooling plates and the associated water thermostat shall be designed so that the mean water temperature is 21 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 dimension
29、s shown in Figure 1. 5.4 Metal rings, external diameter 80 mm, internal diameter 74 mm, height 10 mm and mass (55 1) g, made 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
30、 mm, thickness 2 mm to 4 mm and hardness 50 IRHD to 70 IRHD. 5.6 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 (110 110) mm or circular with a diameter of 103 mm. The reflectometer valu
31、es of all the plates used shall be the same to within 2 % units. The tin and non-tin surfaces of the plates shall be identified. 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 w
32、ill fluoresce when it is exposed to the UV light. BS ISO 6452:2007 3 Dimensions in millimetres aGround. Figure 1 Glass beaker 5.7 Filter paper, with a diameter of 110 mm and a mass per unit surface area of 90 g/m 2 . 5.8 Aluminium foil discs, thickness 0,03 mm, diameter (103 1) mm. Store the prepare
33、d aluminium foil discs in a desiccator (5.14) to avoid condensation and contamination. 5.9 Reflectometer, with a 60 incident beam 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 su
34、itable material such as paper or plastic with a circular hole for the measurements. The thickness of the spacer shall be (0,1 0,02) 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 bein
35、g operated at 80 C. 5.12 Balance, with scale divisions of 0,01 mg. 5.13 Polyethylene gloves. 5.14 Desiccator, with suitable drying 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 te
36、st pieces can be up to 10 mm. Machine thicker materials on the underside to 10 mm (the underside is the side facing away from the 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
37、 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 samples for the determination of the fogging value F and another two for the determination of the mass of the condensable constituents G. BS ISO 6452:2007 5 7 Conditioning Unle
38、ss otherwise specified, condition all test pieces and test samples at 23 C and 50 % RH for at least 16 h. Foamed materials and coated 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.
39、 Table 1 Drying times Material Drying time days Foamed materials 1 Coated fabrics 2 Materials with a high water content (e.g. leather) 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 h
40、ands; use gloves (5.13) or tongs. After the glass plates have been cleaned and dried, make a visual check that the plates are free 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 u
41、ntil the measurements are made. 8.1.2 Cleaning with a dishwasher Wash the sealing rings (5.5), beakers and metal rings twice in a 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. Pri
42、or to each use, clean all glass plates twice in the dishwasher at 80 C using a glass-cleaning detergent. If the dishwasher is not 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 t
43、he glass plates are not reused more than a few times, since microscopic scratches may affect the rate of deposition of any vapours 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 us
44、e a neutral or acid detergent as alkaline detergent affects the glass surface and the reflectrometric fogging value increases. 8.2 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)
45、 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), 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
46、 value stated on the bottle. If this is not the case, check the test conditions. BS ISO 6452:20076 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 temperature of (100 0,5) C, the mass of the condensab
47、le constituents shall be within 0,25 mg of the value stated on the bottle. 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 with DIDP and a higher test result.
48、8.3 Arrangement of test pieces and test samples Insert the test pieces into beakers (one test piece per beaker). Do not touch the 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 t
49、he 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 reflectometer (5.9) in accordance with the manufacturers operating instructions. For this purpose, place a glass plate, with the
