1、Rubber-covered rollers Determination of apparent hardnessPart 1: IRHD methodBS ISO 72671:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017Rubber-covered rollers Determination of apparent hardness Part 1:IRHD methodCylindres revtus de caoutchouc Dterminati
2、on de la duret apparente Partie 1: Mthode DIDCINTERNATIONALSTANDARDISO7267-1Fourth edition2017-08Reference numberISO 7267-1:2017(E)National forewordThis British Standard is the UK implementation of ISO 72671:2017. It supersedes BS ISO 72671:2008, which is withdrawn.The UK participation in its prepar
3、ation was entrusted to Technical Committee PRI/22, Testing and analysis of rubber.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its c
4、orrect application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 97191 4ICS 83.140.99Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and St
5、rategy Committee on 30 September 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 72671:2017 ISO 2017Rubber-covered rollers Determination of apparent hardness Part 1: IRHD methodCylindres revtus de caoutchouc Dtermination de la duret apparente Partie 1: Mth
6、ode DIDCINTERNATIONAL STANDARDISO7267-1Fourth edition2017-08Reference numberISO 7267-1:2017(E)BS ISO 72671:2017ISO 7267-1:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication
7、may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of t
8、he requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 72671:2017ISO 7267-1:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll righ
9、ts reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from ei
10、ther ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgISO 7267-1:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative re
11、ferences 13 Terms and definitions . 14 Time interval between forming and finished grinding, and testing . 15 Conditioning and temperature of test 26 Apparatus . 26.1 Rollers having a radius greater than 50 mm . 26.2 Rollers having a radius of 4 mm to 50 mm . 26.3 Small rollers having a radius less t
12、han 4 mm . 37 Procedure. 38 Expression of results 49 Test report . 4Bibliography 5 ISO 2017 All rights reserved iiiContents PageBS ISO 72671:2017ISO 7267-1:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodie
13、s). 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 represented on that committee. International organizations, governmental and n
14、on-governmental, 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.The procedures used to develop this document and those intended for its further maintenance are descr
15、ibed in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to
16、 the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the I
17、SO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions r
18、elated to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber p
19、roducts, Subcommittee SC 2, Testing and analysis.This fourth edition cancels and replaces the third edition (ISO 7267-1:2008), of which it constitutes a minor revision to update the normative references in Clause 2.A list of all parts in the ISO 7267 series can be found on the ISO website.iv ISO 201
20、7 All rights reservedBS ISO 72671:2017ISO 7267-1:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees.
21、 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, in liaison with ISO, also take part in the work. ISO collaborates closely with the Interna
22、tional Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the differ
23、ent types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall
24、not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is i
25、nformation given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organizatio
26、n (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 2, Testing and analysis.This fourth edition cancels and replaces the third edition
27、 (ISO 7267-1:2008), of which it constitutes a minor revision to update the normative references in Clause 2.A list of all parts in the ISO 7267 series can be found on the ISO website.iv ISO 2017 All rights reserved ISO 7267-1:2017(E)IntroductionThe hardness of a roller covering has traditionally bee
28、n determined on the finished roller, since it is this hardness that is critical to the correct functioning of the roller in its end application. Values of hardness, determined by whichever method is chosen, are therefore dependent not only on the method employed and on the rubber, but also on the di
29、ameter of the roller, the thickness of the covering and, in the case of thin coverings, on the nature of the roller core. For this reason, the term “apparent hardness” is used to distinguish between the values obtained by methods described in the various parts of this document and those that would b
30、e obtained for the rubber if it was possible to use the standard test methods for standard test pieces forming the subjects of other International Standards.Since rollers vary considerably in size, construction and end use, and in view of the fact that hardness determinations are made for such diffe
31、rent purposes as specification and factory process control, it has not been possible to standardize on one test method. Consequently, three methods are described in the ISO 7267 series, each capable of standing alone. ISO 2017 All rights reserved vBS ISO 72671:2017Rubber-covered rollers Determinatio
32、n of apparent hardness Part 1: IRHD methodWARNING 1 Persons using this document should be familiar with normal laboratory practice. This document 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 saf
33、ety and health practices and to determine the applicability of any other restrictions.WARNING 2 Certain procedures specified in this document might involve the use or generation of substances, or the generation of waste, that could constitute a local environmental hazard. Reference should be made to
34、 appropriate documentation on safe handling and disposal after use.1 ScopeThis document specifies a method for the determination of the apparent hardness, expressed in International Rubber Hardness Degrees (IRHD), of vulcanized- or thermoplastic-rubber roller covers. The method is similar in princip
35、le to the methods used for the determination of the hardness of rubber in ISO 48 in that it consists essentially of measuring the depth of penetration of a spherical indentor operating under a specified force. The apparatus used is similar to that described in ISO 48, having a base specifically desi
36、gned for application to roller covers and similar curved surfaces.NOTE With some rollers, there can be significant variation in the thickness of the rubber over the surface of the roller, which could affect the measured apparent hardness.2 Normative referencesThe following documents are referred to
37、in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 48:2010, Rubber, vulcanized or the
38、rmoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD)ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databas
39、es for use in standardization at the following addresses: ISO Online browsing platform: available at http:/www.iso.org/obp IEC Electropedia: available at http:/www.electropedia.org/4 Time interval between forming and finished grinding, and testingTests shall not be carried out less than 16 h after f
40、orming and/or finished grinding and, for arbitration purposes, not less than 72 h after forming.INTERNATIONAL STANDARD ISO 7267-1:2017(E) ISO 2017 All rights reserved 1BS ISO 72671:2017Rubber-covered rollers Determination of apparent hardness Part 1: IRHD methodWARNING 1 Persons using this document
41、should be familiar with normal laboratory practice. This document 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 determine the applicability of any other restric
42、tions.WARNING 2 Certain procedures specified in this document might involve the use or generation of substances, or the generation of waste, that could constitute a local environmental hazard. Reference should be made to appropriate documentation on safe handling and disposal after use.1 ScopeThis d
43、ocument specifies a method for the determination of the apparent hardness, expressed in International Rubber Hardness Degrees (IRHD), of vulcanized- or thermoplastic-rubber roller covers. The method is similar in principle to the methods used for the determination of the hardness of rubber in ISO 48
44、 in that it consists essentially of measuring the depth of penetration of a spherical indentor operating under a specified force. The apparatus used is similar to that described in ISO 48, having a base specifically designed for application to roller covers and similar curved surfaces.NOTE With some
45、 rollers, there can be significant variation in the thickness of the rubber over the surface of the roller, which could affect the measured apparent hardness.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirem
46、ents of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 48:2010, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD)ISO
47、23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: ISO Online browsing pl
48、atform: available at http:/www.iso.org/obp IEC Electropedia: available at http:/www.electropedia.org/4 Time interval between forming and finished grinding, and testingTests shall not be carried out less than 16 h after forming and/or finished grinding and, for arbitration purposes, not less than 72
49、h after forming.INTERNATIONAL STANDARD ISO 7267-1:2017(E) ISO 2017 All rights reserved 1 ISO 7267-1:2017(E)5 Conditioning and temperature of testWhenever possible, the test shall be carried out at a standard laboratory temperature in accordance with ISO 23529. The product under test shall, if possible, be maintained under the test conditions for sufficient time to reach temperature equilibrium with the test environment. Where this is impracticable, the period of time and the conditions sh
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