BS ISO 815-2-2014 Rubber vulcanized or thermoplastic Determination of compression set At low temperatures《硫化橡胶或热塑性橡胶 压缩永久变形的测定 低温条件》.pdf
《BS ISO 815-2-2014 Rubber vulcanized or thermoplastic Determination of compression set At low temperatures《硫化橡胶或热塑性橡胶 压缩永久变形的测定 低温条件》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 815-2-2014 Rubber vulcanized or thermoplastic Determination of compression set At low temperatures《硫化橡胶或热塑性橡胶 压缩永久变形的测定 低温条件》.pdf(28页珍藏版)》请在麦多课文档分享上搜索。
1、BSI Standards PublicationBS ISO 815-2:2014Rubber, vulcanized orthermoplastic Determinationof compression setPart 2: At low temperaturesBS ISO 815-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 815-2:2014. Itsupersedes BS ISO 815-2:2008 which is withdraw
2、n.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/22, Physical testing of rubber.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Us
3、ers are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 78735 5ICS 83.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the
4、Standards Policy and Strategy Committee on 30 November 2014.Amendments issued since publicationDate Text affectedBS ISO 815-2:2014 ISO 2014Rubber, vulcanized or thermoplastic Determination of compression set Part 2: At low temperaturesCaoutchouc vulcanis ou thermoplastique Dtermination de la dformat
5、ion rmanente aprs compression Partie 2: basses tempraturesINTERNATIONAL STANDARDISO815-2Second edition2014-11-01Reference numberISO 815-2:2014(E)BS ISO 815-2:2014ISO 815-2:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no p
6、art 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 either ISO at the address below or ISOs member
7、body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 815-2:2014ISO 815-2:2014(E)Contents PageForeword ivIntroduction v1 Scope . 12 Normative references
8、 13 Principle 13.1 Method 1. 13.2 Method 2. 24 Apparatus for low temperature tests 24.1 Method 1. 24.2 Method 2. 45 Calibration 66 Test pieces . 66.1 Dimensions . 66.2 Preparation 76.3 Number 76.4 Time interval between production and testing 76.5 Conditioning 77 Test conditions . 87.1 Duration of te
9、st . 87.2 Temperature of test . 88 Procedure. 88.1 Method 1. 88.2 Method 2. 99 Expression of results .1010 Precision 1011 Test report 10Annex A (normative) Calibration schedule 12Bibliography .16 ISO 2014 All rights reserved iiiBS ISO 815-2:2014ISO 815-2:2014(E)ForewordISO (the International Organiz
10、ation 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 established
11、 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 standardization.Th
12、e 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 different types of ISO documents should be noted. This document was drafted in accordance with the e
13、ditorial 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 not be held responsible for identifying any or all such patent rights. Details of any patent r
14、ights 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 information given for the convenience of users and does not constitute an endorsement.For an ex
15、planation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this do
16、cument is ISO/TC45, Rubber and rubber products, SC 2, Testing and analysis.This second edition cancels and replaces the first edition (ISO 815-2:2008), which has been technically revised, mainly by addition of method 1 and a calibration schedule (Annex A).ISO 815 consists of the following parts, und
17、er the general title Rubber, vulcanized or thermoplastic Determination of compression set: Part 1: At ambient or elevated temperatures Part 2: At low temperaturesiv ISO 2014 All rights reservedBS ISO 815-2:2014ISO 815-2:2014(E)IntroductionAllowing measurement and recording of the compression set at
18、low temperature is very sensitive to testing conditions, and the values obtained can differ a lot especially for type B test pieces. That is why two measurement methods have been introduced. Method 2 generally gives a higher compression set than method 1, and this difference should be taken into acc
19、ount when preparing material specifications.Those methods are intended to measure the ability of rubbers of hardness within the range 10 IRHD to 95 IRHD to retain their elastic properties at specified temperatures after prolonged compression at constant strain (normally 25 %) under one of the altern
20、ative sets of conditions described. For rubber of nominal hardness 80 IRHD and above, a lower compression strain is used: 15 % for a nominal hardness from 80 IRHD to 89 IRHD, and 10 % for a nominal hardness from 90 IRHD to 95 IRHD. ISO 2014 All rights reserved vBS ISO 815-2:2014ISO 815-2:2014(E)vi I
21、SO 2014 All rights reservedBS ISO 815-2:2014Rubber, vulcanized or thermoplastic Determination of compression set Part 2: At low temperaturesWARNING 1 Persons using this part of ISO 815 should be familiar with normal laboratory practice. This part of ISO 815 does not purport to address all of the saf
22、ety 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.WARNING 2 Certain procedures specified in this part of ISO 815 can involve the use of generation o
23、f 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 part of ISO 815 specifies two methods for the determination of the compression set characteristics o
24、f vulcanized and thermoplastic rubbers at low temperatures.Method 1 derives from the methodology used in ISO 815-1. Method 2 uses a specified testing device, allowing to measure and record the test piece thickness during recovery. Due to the load applied during recovery in method 2, no correlation c
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