BS EN ISO 61:2000 pdf – Plastics Ð Determination of apparent density of moulding material that cannot be poured from a specified funnel.
1 SCOPE AND FIELD OF APPLICATION This International Standard specifies a method of determi- ning the apparent density, i.e. the mass per unit of volume, of loose moulding material that cannot be poured from a funnel of specified design. NOTE- For a method of determining the apparent density of loose moulding material that can be poured from a specified funnel, see ISO 60. A knowledge of apparent density is of limited value in estimating the relative fluffiness or bulk of moulding materials, unless their densities in the moulded condition are approximately the same. 2 APPARATUS 2.1 Balance, accurate to 0,1 g. 2.2 Measuring cylinder, smoothly finished inside, which may be constructed of metal, of capacity 1 000土20 ml and internal diameter 90土2 mm. 2.3 Plunger, consisting of a hollow cylinder of mass 2300土20g, closed at one end and having an external diameter slightly smaller than the internal diameter of the measuring cylinder. The plunger may conveniently be weighted with lead shot. 3 PROCEDURE 3.1 Drop 60土0,2g of loose moulding material, lttle by little, into the measuring cylinder (2.2) so that it is distrib- uted evenly with its surface as level as possible. Lower the plunger (2.3) slowly into the measuring cylinder until it is entirely supported by the material. After 1 min, measure the height of the material, with the plunger resting upon it, to the nearest 1 mm. A convenient method of measuring the height of the material is, for example, by means of a suitable scale marked vertically on the outside surface of the plunger.’ 3.2 Make three determinations on the sample of moulding material under test. 4 EXPRESSION OF RESULTS The apparent density of the moulding material under test is given, in grams per millilitre (see note) by the formula m Ah where m is the mass, in grams, of the material placed in the measuring cylinder (ie. 60); A is the internal cross-sectional area of the measuring cylinder, in square centimetres; h is the height of moulding material in the measuring cylinder, in centimetres. NOTE – Although apparent density is calculated in grams per cubic centimetre, it is expressed here in grams per millilitre for the sake of uniformity with Iso 60. No adjustment of the test result is required. Take as the result the arithmetic mean of the results of the three determinations. 5 TEST REPORT The test report shall include the following particulars : a) complete identification of the material tested; b) the individual results and the mean.