ISO INTERNATIONAL STANDARD 1306 Fourthiedition 1995-11-15 Rubber compounding ingredients - Carbon black (pelletized) - Determination of pour density Ingredientsdemelangedu caoutchouc-Noirdecarbone (en granules)- Determination de la masse volumique apparente ISO Reference nunber y ISO 1306:1995(E) IS01306:1995(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (lsO member bodies). The work of preparing International 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 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft Internationai Standards adopted by the technical committcos are circulated to the member bodies for voting. Publication as an International a vote. International Standard ISO1306 wasprepared by Technical Committee ISO/TC45,Rubberandrubberproducts,Subcommittee SC 3,Rawma- terials (including latex) for use in the rubber industry This fourth edition cancels and replaces the third edition (IS0 1306:1987), which has been technically revised. ISO1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means electronic or mechanical, including photocopying and microfilrn, without permission in writing from the publisher. International Organization for Standardization Case Postale 56. CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii ISO1306:1995(E) INTERNATIONALSTANDARD ISO Rubber compounding ingredients Carbon black (pelletized)Determinationof pour density WARNING - Persons using this International 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 with any national regulatory conditions. 1 Scope 4 Apparatus This International Standard specifies a method for de- 4.1 Cylindrical container, of 1000 cm3 capacity when filled to the top and of a recommended terrmining the pour density of all types of pelletized 100 mm ± 10 mm diameter, having a uniform height carbon blacks for use in the rubber industry. and nopouring lip or deformationof the wall. Other capacities, such as 624 cm3, may be used if it 2 Normative reference canbeshownthatthesameresultsareobtained. The following standard contains provisions which, 4.2 Stralghtedge or spatula, at least 130mm in through reference in this text, constitute provisions of length. this International Standard. At the time of publication, the edition indicated was valid. All standards are sub- 4.3 Balance, accurate to 0,1 g. ject to revision,and parties to agreements based on this International Standard are encouraged to investi- gate the possibility of applying the rmost recent edition of the standard indicated below.Members of IEC and Procedure 5 ISO maintain registers of currently valid International Standards Pour the carbon black into the centre of the tared cylindrical container (4.1) from a height of not more IsO1124:1988,Rubbercompoundingingredients- than 50 mm above the rim. Use a large enough Carbon black shipment sampling procedures. excess to form a cone above the rim of the cylindrical container. Level the surface with a single sweep of the straightedge or spatula (4.2) held horizontally. and 3 Principle perpendicular to and in firm contact with the rim of the container. Weigh the container with the carbon A measured volume of carbon black is weighed and black.Determinethe mass of the carbonblacktothe the pour density calculated nearestgram 1 @ISO ISO1306:1995(E) 6 Expression of results short-term testing. The precision is expressed in ab- soluteterms. in grams per cubic decimetre (or kilograrns per cubic 7.3 The repeatability (single operator) r has been metre) is numerically equal to t