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1、INTERNATIONAL STANDARD IS0 8511 Second edition 1995-11-15 Rubber compounding ingredients - Carbon black - Determination of pellet size distribution lngrddients de melange du caoutchouc - Noir de carbone - D 0,125 mm; 0.25 mm; 0,5 mm; 1,OO mm; 2,00 mm. If a 0,71 mm sieve is used, or sieves of sizes n
2、ot specified in 4.2, place them in the appropriate position in the stack. 6.2 Pass the sample through the sample splitter (4.5) and take two test portions, each of 100 g ) s. 2,00 0,6 to 3,5 l,oo 26,9 to 68,7 0,50 24,6 to 44,9 0,25 3,2 to 21,4 0,125 I,2 to 6,2 Receiver 0.8 to 1.9 2 Copyright Interna
3、tional Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 03:27:01 MDTNo reproduction or networking permitted without license from IHS -,-,- Q IS0 IS0 8511:1995(E) Both the repeatability and the reproducib
4、ility values represent short-term testing. Precision is expressed in percent relative terms. Table 4 Sieve aperture mm I Repeatability % relative 8.3 Single test 8.3.1 Repeatability (single operator) The repeatability r has been estimated as reported in table 2. I 2,00 I 26,8 Table 2 1 ,oo 8.7 0,50
5、12,9 0,25 19.9 0,125 44,8 Receiver 52.2 Sieve aperture Repeatability mm % relative 2,00 34.7 1 ,oo 12,2 0.50 15,3 0,25 22,7 0,125 62,7 Receiver 67,6 Two single test results that differ by more than the values given in table 2 shall be considered suspect and dictate that some appropriate investigativ
6、e action be taken. Two duplicate test averages that differ by more than the values given in table 4 shall be considered suspect and dictate that some appropriate investigative action be taken. 8.4.2 Reproducibility (between laboratories) 8.3.2 Reproducibility (between laboratories) The reproducibill
7、ity R has been estimated as reported in table 3. The reproducibility R has been estimated as reported in table 5. Table 5 Sieve aperture Reproducibility mm % relative 2,00 101,8 l,oo 53,9 0,50 72,3 0.25 69,3 0,125 91 ,o Table 3 I Receiver I 107,2 I Sieve aperture Reproducibility mm % relative 2.00 1
8、00,8 1 ,oo 56,5 0.50 73.1 0,25 74,0 0,125 119,2 Receiver 139,6 Two single test results produced in separate labora- tories that differ by more than the values given in table 3 shall be considered suspect and dictate that some appropriate investigative action be taken. Two duplicate test averages pro
9、duced in separate laboratories that differ by more than the values given in table 5 shall be considered suspect and dictate that some appropriate investigative action be taken. 8.5 Bias In test method terminology, bias is the difference be- tween an average measured test property value and an accept
10、ed reference (true) value. Reference values do not exist for this test method since the value of the test property is defined solely by the test method. The bias cannot, therefore, be determined. NOTES 8.4 Duplicate test average 1 Due to poor reproducibility, it is recommended that the test be limit
11、ed to within-laboratory usage. 8.4.1 Repeatability (single operator) The repeatability r has been estimated as reported in table 4. 2 For guidance on the interpretation of precision and bias information, the user is referred to ISO/TR 9272:1986, Rubber and rubber products - Determination of precisio
12、n for test method standards. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 03:27:01 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8511:1995(E)
13、 IS0 9 Test report The test report shall include the following information: a) a reference to this International Standard; b) all details necessary for identification of the sample; c) the mean values of the two test results, to the nearest whole number, as follows: - the percentage retained on the
14、2,00 mm sieve, - the percentage passing the 1,00 mm sieve but retained on the 0,5 mm sieve, - the percentage passing the 0,5 mm sieve but retained on the 0,25 mm sieve, - the percentage passing the 0.25 mm sieve but retained on the 0,125 mm sieve, - the percentage passing the 0,125 mm sieve. If a me
15、sh size different from those specified in 4.2 is used, its results shall be included in the appropriate position in the test report. - the percentage passing the 2,00 mm sieve but retained on the 1,00 mm sieve, Copyright International Organization for Standardization Provided by IHS under license wi
16、th ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 03:27:01 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8511:1995(E) ICS 83.040.20 Descriptors: rubber industry, rubber, ingredients, pelletized materials, carbon black, tests, determinati
17、on, size classification, grain size analysis. Price based on 4 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 03:27:01 MDTNo reproduction or networking permitted without license from IHS -,-,-