《07-30162647-DC.pdf》由会员分享，可在线阅读，更多相关《07-30162647-DC.pdf（21页珍藏版）》请在三一文库上搜索。
1、a Date: 15 February 2007 Origin: International Latest date for receipt of comments: 31 May 2007 Project no.: 2007/00430 Responsible committee: PRI/22 Physical testing of rubber Interested committees: Title: Draft BS ISO 7743 Rubber, vulcanized or thermoplastic Determination of compression stress-str
2、ain properties Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede NONE . If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: TH
3、IS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 May 2007. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf fo
4、r information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to disseminatio
5、n by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email ordersbsi-. British, International and foreign standards are also available from BSI Customer Services. British Standards on CD or
6、 Online are available from British Standards Publishing Sales Limited. Tel: 01344 404409 or email bsonlinetechindex.co.uk. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The Briti
7、sh Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-. Direct tel: 020 8996 7565 Responsible Committee Secretary: Miss Charlotte Armstrong (BSI) E-mail: charlotte.armstron
8、gbsi- Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 6.1 DPC: 07/30162647 DC Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:46:39 GMT+00:00 2007, Uncontrolled Co
9、py, (c) BSI b Introduction This draft standard is based on international discussions in which the UK has taken an active part. Your comments on this draft are invited and will assist in the preparation of the consequent standard. Comments submitted will be reviewed by the relevant BSI committee befo
10、re sending the consensus UK vote and comments to the international secretariat, which will then decide appropriate action on the draft and the comments received. If no comments are received to the contrary, then the UK will approve this draft. If the international standard is approved, it is possibl
11、e the text will be published as an identical British Standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate att
12、ention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. Comments should be compatible with Version 6.0 or Version 97 o
13、f Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should be presented as given in the example below. Further information on submitting c
14、omments and how to obtain a blank electronic version of a comment form are available from the BSI web site at:http:/www.bsi- Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figur
15、e/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to which no connectio
16、n . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed C
17、opy: London South Bank University, London South Bank University, Fri Mar 02 00:46:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS S
18、UCH. IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS. DRAFT
19、INTERNATIONAL STANDARD ISO/DIS 7743 International Organization for Standardization, 2007 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION ISO/TC 45/SC 2 Voting begins on: 2007-02-14 Secretariat: SIS Voting terminates on: 2007-07-16 Rubber, vulcanized or the
20、rmoplastic Determination of compression stress-strain properties Caoutchouc vulcanis ou thermoplastique Dtermination des proprits de contrainte/dformation en compression Revision of second edition (ISO 7743:2004) ICS 83.060 To expedite distribution, this document is circulated as received from the c
21、ommittee secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at publication stage. Pour acclrer la distribution, le prsent document est distribu tel quil est parvenu du secrtariat du comit. Le travail de rdaction et de composition de texte sera effectu au Sec
22、rtariat central de lISO au stade de publication. Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:46:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 7743 ii ISO 2007 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In acco
23、rdance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes l
24、icensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for prin
25、ting. 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. Copyright notice This ISO document is a Draft International Standard and i
26、s copyright-protected by ISO. Except as permitted under the applicable laws of the users country, neither this ISO draft nor any extract from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying, recording or otherwise, without prior
27、 written permission being secured. Requests for permission to reproduce should be addressed to either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.
28、org Web www.iso.org Reproduction may be subject to royalty payments or a licensing agreement. Violators may be prosecuted. Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:46:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 7743 ISO 2006 All rights reserv
29、ed iii Contents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions.2 4 Principle .2 5 Apparatus and materials.2 6 Test pieces.3 7 Number of test pieces.3 8 Time-lapse between vulcanization and testing4 9 Conditioning 4 10 Temperature of test.4 11 Procedure.4 11.
30、1 Measurement of test pieces .4 11.2 Determination of stress-strain properties.5 11.2.1 Methods A and B.5 11.2.2 Method C 5 12 Expression of results5 12.1 For methods A and B5 12.2 For method C.6 13 Test report7 Annex A (informative) Extrapolation of results to non-standard test pieces.8 Annex B (no
31、rmative) Calibration.11 B.1 Inspection.11 B.2 Schedule.11 Bibliography13 DRAFT 2007 Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:46:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 7743 iv ISO 2006 All rights reserved Foreword ISO (the International O
32、rganization 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. Each member body interested in a subject for which a technical committee has been estab
33、lished 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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardizat
34、ion. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting
35、. 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such p
36、atent rights. ISO 7743 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 2, Testing and analysis. This third edition cancels and replaces the second edition (ISO 7743:2004), of which clause 13 and annex A have been technically revised and the references to IS
37、O 471, ISO 3383, ISO 4648 and ISO 4661-1 been replaced by ISO 23529. DRAFT 2007 Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:46:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 7743 ISO 2006 All rights reserved v Introduction Knowledge of compression
38、stress-strain properties is important in the design of, for instance, bridge bearings, anti-vibration mountings and O-rings. Measurement of compression stress-strain behaviour is also used for the quality control of small O-rings and other small products (i.e. under 2 mm thickness) where hardness ca
39、nnot easily be measured. Compression tests are also used to detect the presence of porosity in products such as pipe sealing rings. DRAFT 2007 Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:46:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Licensed Copy: Lond
40、on South Bank University, London South Bank University, Fri Mar 02 00:46:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI DRAFT INTERNATIONAL STANDARD ISO/DIS 7743 ISO 2006 All rights reserved 1 Rubber, vulcanized or thermoplastic Determination of compression stress-strain properties WARNING - Persons
41、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 responsibility of the user to establish appropriate safety and health practices and to ensure complia
42、nce with any national regulatory conditions. 1 Scope This International Standard specifies methods for the determination of the compression stress-strain properties of vulcanized or thermoplastic rubber using a standard test piece, a product or a part of a product. Three procedures are given: using
43、a standard test piece with the metal plates lubricated (method A); using a standard test piece with the metal plates bonded to the test piece (method B); using a product or a part of a product with the metal plates lubricated (method C). The three procedures do not give the same results. With lubric
44、ated test pieces, the results are dependent only on the modulus of the rubber and are independent of the test piece shape, provided that complete slip conditions are achieved. Effective lubrication is sometimes difficult to achieve, however, and it is prudent to inspect the variance in the test resu
45、lts from replicate test pieces for indications of erratic slip conditions. With bonded test pieces, the results are dependent on both the modulus of the rubber and the test piece shape. The dependence on test piece shape is strong and consequently the results will be markedly different from those ob
46、tained with lubricated test pieces. For products, the result is dependent on the shape, but as tests on products are mainly comparative this is acceptable. NOTE For well-specified product shapes, such as O-rings, the result may be correlated to the hardness value. Provision is made for the use of te
47、st pieces of different size and/or shape from the specified test piece, but extrapolation of the results obtained to other sizes and shapes may not be possible. Guidance on the effect of size and shape of test piece and of bonding or lubricating is given in Annex A. The method is not suitable for ma
48、terials that exhibit high set. The necessary calibration schedule for this type of measurement is included in Annex B. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated r
49、eferences, the latest edition of the referenced document (including any amendments) applies. ISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters DRAFT 2007 Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:46:39 GMT+00:00 2007, Uncontrolled Copy, (c) BSI