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1、INTERNATIONAL STANDARD ISO 6187 First edition 2001-09-15 Reference number ISO 6187:2001(E) ISO 2001 Rigid cellular plastics Determination of friability Plastiques alvolaires rigides Dtermination de la friabilit ISO 6187:2001(E) ii ISO 2001 All rights reserved PDF disclaimer This PDF file may contain
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4、ters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2001 All rights reserved. Unless otherwise
5、 specified, no part of this publication may be reproduced or utilized in any form or by any means, elec- tronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs mem- ber body in the country of the requester. ISO copyright
6、 office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 734 10 79 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland -,-,- ISO 6187:2001(E) ISO 2001 All rights reserved iii ContentsPage 1Scope .1 2Normative reference .1 3Terms and definitions 1 4Apparatus .1 5Test spec
7、imens .2 6Procedure .2 7Calculation 2 8Precision and bias 3 9Test report 3 Bibliography.4 -,-,- ISO 6187:2001(E) iv ISO 2001 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of p
8、reparing 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 represented on that committee. International organizations, governmental and non-governmental,
9、in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft Inter
10、national Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this Internationa
11、l Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 6187 was prepared by Technical Committee ISO/TC 61,Plastics, Subcommittee SC 10, Cellular plastics. INTERNATIONAL STANDARDISO 6187:2001(E) ISO 2
12、001 All rights reserved 1 Rigid cellular plastics Determination of friability WARNING This International Standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health
13、practices and determine the applicability of regulatory limitations prior to use. 1Scope This International Standard specifies a method for the determination of the mass loss of rigid cellular plastics as a result of a combination of abrasion and impact produced by a laboratory tumbling mechanism. 2
14、Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreement
15、s based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of c
16、urrently valid International Standards. ISO 845:1988,Cellular plastics and rubbers Determination of apparent (bulk) density. 3Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 cellular plastic a plastic whose density is reduced by t
17、he presence of numerous small cavities (cells), interconnecting or not, dispersed throughout the mass 3.2 friability the amount of cellular plastic that will crumble or crush into powder when in contact with another surface 4Apparatus 4.1Box Use a cubical box of oak wood, having inside dimensions of
18、bybyand mounted rigidly at the centre of onebyend on a rotatable horizontal shaft so that the axis of the shaft is normal to the end face of the box. One side of the box shall be hinged as a door and shall be gasketed to be dust-tight. The box shaft shall be capable of being motor driven at a consta
19、nt speed of () revolutions per minute. 190 mm197 mm197 mm 197 mm197 mm 602 -,-,- ISO 6187:2001(E) 2 ISO 2001 All rights reserved 4.2Cubes Twenty-four laboratory-conditioned, solidoak cubes shall be placed in the box with the test specimens. The density of the oak cubes shall be approximately. Number
20、 each group of wood cubes 1 to 24. At the end of every 600-revolution test, remove one “used” cube (follow the number sequence and remove the oldest cube) and replace with a correspondingly numbered “new” cube. In this manner, cube wear is eliminated as an uncontrolled variable in the test method. W
21、hen the corners of the wood cubes have been worn so that the radius of curvature is greater thanor the cubes have become altered so as not to be compatible with new cubes, they shall be discarded and new ones used. A conventional machinists radius gauge may be used for checking the edge wear. 5Test
22、specimens Using a fine-tooth saw, cut out three sets of twelvecubes. Test twelve cubes at a time, cut from the same piece of the cellular plastic. When a flat product has special surfaces due to treatment or moulding, cut each cube to include such special surfaces as one face, except that the edges
23、and corners of the product shall not be used. Dry and condition specimens prior to testing, following applicable specifications for the product. If the material is adversely affected by oven temperatures, then condition the specimens for not less thenatand relative humidity before testing. In the ab
24、sence of definite drying temperatures, dry the specimens in an oven atto constant mass, and hold in a desicator to cool to room temperature before testing. Where circumstances or requirements preclude compliance with these conditioning procedures, exceptions agreed upon by the purchaser and the manu
25、facturer may be made, but they shall be specifically listed in the test report. 6Procedure Condition the test specimens and oak cubes atandR.H. for a minimum of(it will not be necessary to condition the specimens for a furtherif they have already been conditioned forunder these conditions see clause
26、 5). Conduct the test in the standard laboratory atmosphere ofandrelative humidity. Weigh a set of twelve conditioned test specimens on a balance to within. Place the twelve specimens together with the 24 oak cubes in the clean test box and secure the lid tightly. Rotate the box at () revolutions pe
27、r minute for () revolutions. Immediately after the test period, carefully empty the contents of the box onto amesh screen and tap gently to remove dust and small particles. Carefully remove the specimens from the screen and weigh promptly. Make three tests. Use a new set of test specimens for each t
28、est. 7Calculation Calculate the percent mass loss for each set of specimens using the following equation: where is the original mass of the test specimens; (190,8)mm 650 kg/m3 1,6 mm (251,5)mm 40 h(232) C (505)% (702) C (232) C (505)%6 h 6 h40 h (232) C (505)% 1 % 6026003 9,5 mm % mass loss= m1 m2 m
29、1 100 m1 ISO 6187:2001(E) ISO 2001 All rights reserved 3 is the final mass of the specimens. Calculate the average percent mass loss for the three sets of specimens, expressing the result to two significant figures. 8Precision and bias Precision The precision of this test method is given in Table 1.
30、 Repeatability The difference between successive results obtained by the same operator with the same apparatus under constant operating conditions on identical test materials would exceed the values given for repeatability in Table 1 only in one case in twenty. Reproducibility The difference between
31、 two single and independent results obtained by different operators working in different laboratories on identical material would exceed the values given for reproducibility in Table 1 only in one case in twenty. Bias No information can be presented on the bias of the procedure in this test method b
32、ecause no material having an accepted reference value is available. 9Test report The test report shall include the following: a)a reference to this International Standard; b)a complete description of the material tested, including type, source and density determined in accordance with ISO 845, and s
33、pecial surfaces if any; c)the conditioning and drying procedures followed, and any special conditions employed in the test; d)the percent mass loss; e)any comments on the mode and extent of abrasion, erosion, crumbling, cracking, etc.; f)the date of the test. Table 1 Precision MaterialMass lossRepea
34、tabilityReproducibility (cellular plastic) A0,110,343100,40360 B1,00,65650,8383 C5,31,6314,279 D312,68,28,527 E494,59,11123 F505,3111122 is the repeatability standard deviation. is the reproducibility standard deviation. NOTE 1The materials listed in this table include nominallyexpanded polystyrene,
35、 nominally extrudedpolystyrene,nominallypolyurethanefoam,nominal polyisocyanurate foam and commercial phenolic foam. The results are for materials used in the round- robin test only, which may not be commercially available. These materials were selected to provide a proper range of results, not to c
36、haracterize the materials. NOTE 2Six laboratories participated. Each laboratory carried our three tests. m2 %2sr2sr2sR2sR % sr sR 16 kg/m3 32 kg/m332 kg/m332 kg/m3 -,-,- ISO 6187:2001(E) 4 ISO 2001 All rights reserved Bibliography 1 ASTM Research Report C16-1006, available from ASTM, 100 Barr Harbor Dr, West Conshohocken, PA 19428, USA. 2 ISO 472:1999,Plastics Vocabulary. -,-,- ISO 6187:2001(E) ICS 83.100 Price based on 4 pages ISO 2001 All rights reserved -,-,-