1、BRITISH STANDARD BS 5293-2: 1996 ISO 1306:1995 Sampling and testing carbon black for use in the rubber industry Part 2: Method for determination of pour density ICS 83.040.20BS5293-2:1996 This British Standard, having been prepared under the directionof the Sector Board for Materials and Chemicals,
2、was published under the authority of the Standards Board and comes into effect on 15 May 1996 BSI 10-1999 First published May 1990 Second edition May 1996 The following BSI references relate to the work on this standard: Committee reference PRI/53 Draft for comment 94/305026 DC ISBN 0 580 25608 1 Co
3、mmittees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PRI/53, Carbon black, upon which the following body was represented: British Rubber Manufacturers Association Ltd. Amendments issued since publication Amd. No. Date CommentsBS
4、5293-2:1996 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative reference 1 3 Principle 1 4 Apparatus 1 5 Procedure 1 6 Expression of results 1 7 Precision and bias 1 8 Test report 2 List of references Inside back coverBS5293-2:1996 ii BSI
5、 10-1999 National foreword This Part of BS 5293 has been prepared by Technical Committee PRI/53 and is identical to ISO1306:1995 Rubber compounding ingredients Carbon black (pelletized) Determination of pour density, published by the International Organization for Standardization (ISO). It supersede
6、s BS5293-2:1990 which is withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross
7、-reference International Standard Corresponding British Standard ISO 1124:1998 BS 5293 Sampling and testing carbon black for use in the rubber industry Part 1:1990 Methods of sampling (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 and
8、2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5293-2:1996 BSI 10-1999 1 WARNING Persons using this International Standard should be fami
9、liar 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 regulatory conditions. 1 S
10、cope This International Standard specifies a method for determining the pour density of all types of pelletized carbon blacks for use in the rubber industry. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this Internat
11、ional Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Member
12、s of IEC and ISO maintain registers of currently valid International Standards. ISO 1124:1988, Rubber compounding ingredients Carbon black shipment sampling procedures. 3 Principle A measured volume of carbon black is weighed and the pour density calculated. 4 Apparatus 4.1 Cylindrical container, of
13、1000cm 3capacity when filled to the top and of a recommended100mm 10mm diameter, having a uniform height and no pouring lip or deformation of the wall. Other capacities, such as624cm 3 , may be used if it can be shown that the same results are obtained. 4.2 Straightedge or spatula, at least130mm in
14、length. 4.3 Balance, accurate to0,1g. 5 Procedure Pour the carbon black into the centre of the tared cylindrical container (4.1) from a height of not more than50mm above the rim. Use a large enough excess to form a cone above the mm of the cylindrical container. Level the surface with a single sweep
15、 of the straightedge or spatula (4.2) held horizontally, and perpendicular to and in firm contact with the rim of the container. Weigh the container with the carbon black. Determine the mass of the carbon black to the nearest gram. 6 Expression of results If the specified container is used, the pour
16、 density ap , in grams per cubic decimetre (or kilograms per cubic metre) is numerically equal to the mass, in grams, of the carbon black. Alternatively, the pour density apmay be expressed in grams per cubic centimetre, using the formula where 7 Precision and bias 7.1 The precision data give an est
17、imate of the precision as described below. The precision parameters shall not be used for acceptance/rejection testing of any group of materials without documentation that they are applicable to those particular materials and to the specific testing protocols that include this test method. 7.2 These
18、 precision data are based on single tests on three samples by eight laboratories over a period of two days. The density of the samples ranged from about345kg/m 3to about450kg/m 3 . Both the repeatability and reproducibility values given represent short-term testing. The precision is expressed in abs
19、olute terms. 7.3 The repeatability (single operator) r has been estimated to be3kg/m 3 . Two single test results that differ by more than3kg/m 3shall be considered suspect and require appropriate investigative action to be taken. m is the mass, in grams, of the carbon black; V is the capacity, in cu
20、bic centimetres, of the cylindrical container (4.1). m V -BS5293-2:1996 2 BSI 10-1999 7.4 The reproducibility (interlaboratory) R has been estimated to be13kg/m 3 . Two single test results, produced in separate laboratories, that differ by more than13kg/m 3shall be considered suspect and require app
21、ropriate investigative action to be taken. 7.5 In test method terminology, bias is the difference between an average test property value and an accepted reference (true) test property value. Reference values do not exist for this method since the value of the test property is defined solely by the t
22、est method. The bias cannot, therefore, be determined. 8 Test report The test report shall include the following particulars: a) a reference to this International Standard; b) all details necessary for identification of the sample; c) the results obtained and the units in which they are expressed; d
23、) the capacity of the cylindrical container, if not1000cm 3 .BS5293-2:1996 BSI 10-1999 List of references See national foreword.BS 5293-2: 1996 ISO1306:1995 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishS
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