BS ISO 4659:2020 pdf download.Styrene-butadiene rubber (carbon black or carbon black and oil masterbatches) — Evaluation procedure.
4 Sampling and further preparative procedures
4.1 Select the sample from the lot in accordance with ISO 1795.
4.2 Take a laboratory sample of approximately 1,5 kg by the method described in ISO 1795.
4.3 Prepare test samples in accordance with ISO 1795.
5 Physical and chemical tests on raw rubber
5.1 Mooney viscosity
Prepare a test sample in accordance with the preferred procedure in ISO 1795, i.e. without milling.
If massing is deemed necessary, use a mill with its roll surfaces maintained at a temperature of
35 °C ± 5 °C and record this fact in the test report.
Determine the Mooney viscosity in accordance with ISO 289-1. Record the result as ML(1 + 4) at 100 °C.
5.2 Volatile matter
Determine the volatile-matter content by the hot-mill method or by the oven method as specified in ISO 248-1 or by the method specified in ISO 248-2.
5.3 Ash
Determine the ash in accordance with either method A, or method B, or method C of ISO 247-1:2018, or method A of ISO 247-2:2018.
6.2.2.3 Method B — Single stage mixing using a laboratory internal mixer
For laboratory internal mixers having nominal capacities of 65 cm 3 to about 2 000 cm 3 , the batch mass shall be equal to the nominal mixer capacity, in cubic centimetres, multiplied by the density of the compound. For each batch mixed, the laboratory internal mixer conditions shall be the same during the preparation of a series of identical mixes. At the beginning of each series of test mixes, a machine-conditioning batch shall be mixed using the same formulation as the mixes under test. The laboratory internal mixer shall be allowed to cool down to 60 °C between the end of one test batch and the start of the next. The temperature control conditions shall not be altered during the mixing of a series of test batches.
9 Precision
See Annex A.
10 Test report
The test report shall include the following information:
a) a reference to this document, i.e. ISO 4659:2020;
b) all details necessary for the identification of the sample;
c) the time and temperature used for the Mooney viscosity determination, and whether a massing
procedure was used (and, if so, the parameters);
d) the method used for the volatile-matter content determination (ISO 248-1, mill or oven,
or ISO 248-2);
e) the method used for the ash determination (method A, or method B or method C of ISO 247-1:2018,
or method A of ISO 247-2:2018);
f) the reference materials used;
g) the mixing procedure used;
h) the size (nominal mixer capacity) of the mixer used for Method B;
i) the conditioning times used in 6.2.2.2 or 6.2.2.3;
j) for Clause 7:
— the type of curemeter used, and
— the time for M H or F max ;
k) any operation not included in this document or in the International Standards to which reference is made, as well as any operation regarded as optional;
l) the results and the units in which they have been expressed;
m) the dates of the tests.BS ISO 4659 pdf download.