1、Rubber threads Methods of testBS ISO 2321:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017Rubber threads Methods of testFils lastiques Mthodes dessaiINTERNATIONALSTANDARDISO2321Fourth edition2017-08Reference numberISO 2321:2017(E)National forewordThis Br
2、itish Standard is the UK implementation of ISO 2321:2017. It supersedes BS 5421-1:1976 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee TCI/24, Physical testing of textiles.A list of organizations represented on this committee can be obtained on request
3、 to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 89067 3ICS 83.140.99Compliance with a British Sta
4、ndard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 2321:2017 ISO 2017Rubber threads Meth
5、ods of testFils lastiques Mthodes dessaiINTERNATIONAL STANDARDISO2321Fourth edition2017-08Reference numberISO 2321:2017(E)BS ISO 2321:2017ISO 2321:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no
6、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 either ISO at the address below or ISOs member
7、 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.orgBS ISO 2321:2017ISO 2321:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published
8、in SwitzerlandAll rights 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 ca
9、n be requested from either 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 2321:2017(E)Foreword vi1 Scope . 12 Normat
10、ive references 13 Terms and definitions . 14 Conditioning of samples or test pieces 35 Count . 35.1 Sectional count 35.2 Conventional count (size number) 45.3 Apparatus 45.4 Procedure 55.4.1 Cutting out the test pieces . 55.4.2 Weighing the test pieces 65.5 Expression of results 66 Metric yield 66.1
11、 Procedure 66.2 Expression of results 77 Properties of rubber threads 78 Density 78.1 Principle 78.2 Method . 88.2.1 Method A . 88.2.2 Method B . 89 Tensile strength, modulus and elongation at break 89.1 Apparatus 89.2 Procedure 99.2.1 Test piece preparation 99.2.2 Loop formation and testing 99.3 Ex
12、pression of results . 1010 Schwartz value (SV) 1010.1 Apparatus . 1010.2 Procedure . 1010.3 Expression of results . 1111 Elongation under a specified load .1111.1 Test pieces 1111.2 Apparatus . 1111.3 Procedure . 1211.4 Expression of results . 1212 Stress retention .1312.1 Test pieces 1312.2 Apparat
13、us . 1312.3 Procedure . 1312.4 Expression of results . 1412.5 Test report 1413 Tension set .1413.1 Test piece preparation . 1413.2 Apparatus . 1513.3 Procedure . 1513.4 Expression of results . 1514 Accelerated ageing test on rubber threads in a relaxed state 16 ISO 2017 All rights reserved iiiConten
14、ts PageBS ISO 2321:2017ISO 2321:2017(E)14.1 General 1614.2 Principle . 1614.3 Test pieces 1614.4 Apparatus . 1614.5 Procedure . 1614.6 Expression of results . 1615 Dry-heat resistance .1715.1 General 1715.2 Principle . 1715.3 Apparatus . 1715.4 Procedure . 1815.5 Expression of results . 1815.6 Test
15、report 1816 Ribbons: Degree of adhesion between threads .1916.1 General 1916.2 Principle . 1916.3 Apparatus . 1916.4 Test pieces 1916.5 Procedure . 1916.6 Expression of results . 2016.7 Test report 2017 Resistance to copper staining during laundering .2017.1 General 2017.2 Principle . 2117.3 Reagent
16、s. 2117.4 Apparatus and materials . 2117.5 Test pieces 2217.6 Preparation of test pieces . 2217.6.1 General. 2217.6.2 Individual samples of textile fabric .2217.6.3 Individual textile yarns 2217.6.4 Multifibre fabric swatches 2217.7 Procedure . 2217.8 Test report 2318 Effect of washing 2318.1 Genera
17、l 2318.2 Principle . 2318.3 Apparatus . 2318.4 Standard washing solution 2418.5 Procedure . 2418.6 Expression of results . 2518.7 Test report 2519 Resistance to atmospheric fume staining2519.1 General 2519.2 Principle . 2619.2.1 General. 2619.2.2 Method A 2619.2.3 Method B 2619.3 Reagents. 2619.4 Ap
18、paratus and materials . 2619.4.1 Method A 2619.4.2 Method B 2619.5 Test pieces 2819.5.1 General. 2819.5.2 Method A 2819.5.3 Method B 28iv ISO 2017 All rights reservedBS ISO 2321:2017ISO 2321:2017(E)14.1 General 1614.2 Principle . 1614.3 Test pieces 1614.4 Apparatus . 1614.5 Procedure . 1614.6 Expres
19、sion of results . 1615 Dry-heat resistance .1715.1 General 1715.2 Principle . 1715.3 Apparatus . 1715.4 Procedure . 1815.5 Expression of results . 1815.6 Test report 1816 Ribbons: Degree of adhesion between threads .1916.1 General 1916.2 Principle . 1916.3 Apparatus . 1916.4 Test pieces 1916.5 Proce
20、dure . 1916.6 Expression of results . 2016.7 Test report 2017 Resistance to copper staining during laundering .2017.1 General 2017.2 Principle . 2117.3 Reagents. 2117.4 Apparatus and materials . 2117.5 Test pieces 2217.6 Preparation of test pieces . 2217.6.1 General. 2217.6.2 Individual samples of t
21、extile fabric .2217.6.3 Individual textile yarns 2217.6.4 Multifibre fabric swatches 2217.7 Procedure . 2217.8 Test report 2318 Effect of washing 2318.1 General 2318.2 Principle . 2318.3 Apparatus . 2318.4 Standard washing solution 2418.5 Procedure . 2418.6 Expression of results . 2518.7 Test report
22、 2519 Resistance to atmospheric fume staining2519.1 General 2519.2 Principle . 2619.2.1 General. 2619.2.2 Method A 2619.2.3 Method B 2619.3 Reagents. 2619.4 Apparatus and materials . 2619.4.1 Method A 2619.4.2 Method B 2619.5 Test pieces 2819.5.1 General. 2819.5.2 Method A 2819.5.3 Method B 28iv ISO
23、 2017 All rights reserved ISO 2321:2017(E)19.6 Procedure . 2819.6.1 Method A 2819.6.2 Method B 2819.7 Test report 29Bibliography .30 ISO 2017 All rights reserved vBS ISO 2321:2017ISO 2321:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national st
24、andards 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 has the right to be represented on that committee. International o
25、rganizations, 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.The procedures used to develop this document and those intended for i
26、ts 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 editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/d
27、irectives).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 rights identified during the development of the document will be in
28、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 explanation on the voluntary nature of standards, the meaning of ISO
29、specific terms and expressions related 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 Committe
30、e ISO/TC 45, Rubber and rubber products, Subcommittee SC 4, Products (other than hoses).This fourth edition cancels and replaces the third edition (ISO 2321:2006), which has been technically revised.The main changes compared to the previous edition are as follows: Clause 3 has been added to list all
31、 the terms and definitions; the distance between cutting blades in Figure 1 has been added; the tensile testing of type A rings in Figure 2 has been added and all the figure numbers have been updated; a new test, namely tension set, has been added in Clause 13; the clause numbers in Table 1 and Tabl
32、e 2 have been updated; the unit of density has been changed from megagram per cubic metre (Mg/m3) to gram per cubic centimetre (g/cm3).vi ISO 2017 All rights reservedBS ISO 2321:2017ISO 2321:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national
33、 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 has the right to be represented on that committee. Internationa
34、l 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.The procedures used to develop this document and those intended fo
35、r 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 editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.or
36、g/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 rights identified during the development of the document will be
37、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 explanation on the voluntary nature of standards, the meaning of I
38、SO specific terms and expressions related 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 Commi
39、ttee ISO/TC 45, Rubber and rubber products, Subcommittee SC 4, Products (other than hoses).This fourth edition cancels and replaces the third edition (ISO 2321:2006), which has been technically revised.The main changes compared to the previous edition are as follows: Clause 3 has been added to list
40、all the terms and definitions; the distance between cutting blades in Figure 1 has been added; the tensile testing of type A rings in Figure 2 has been added and all the figure numbers have been updated; a new test, namely tension set, has been added in Clause 13; the clause numbers in Table 1 and T
41、able 2 have been updated; the unit of density has been changed from megagram per cubic metre (Mg/m3) to gram per cubic centimetre (g/cm3).vi ISO 2017 All rights reserved INTERNATIONAL STANDARD ISO 2321:2017(E)Rubber threads Methods of test1 ScopeThis document specifies methods of test for determinin
42、g general physical and mechanical properties of rubber threads, as well as specific mechanical properties of such threads in contact with fabrics. Owing to the comparatively small cross-section and the unusual conditions of service of this material, certain special methods have been developed.Some o
43、f the tests included in this document are not entirely suitable for threads made from certain synthetic rubbers (e.g. urethane rubber). These tests are intended for natural or synthetic polyisoprene rubbers.Comparisons can only be made on new rubber threads or on those with identical processing hist
44、ories. In the interpretation of results from threads which have been subjected to spooling, fabrication or any other process, the previous history is important, and what is known of this and of any relaxation treatments used is intended to be reported.2 Normative referencesThe following documents ar
45、e referred to 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 37, Rubber, vulcaniz
46、ed or thermoplastic Determination of tensile stress-strain propertiesISO 105-A02, Textiles Tests for colour fastness Part A02: Grey scale for assessing change in colourISO 105-A03, Textiles Tests for colour fastness Part A03: Grey scale for assessing stainingISO 188, Rubber, vulcanized or thermoplas
47、tic Accelerated ageing and heat resistance testsISO 648, Laboratory glassware Single-volume pipettesISO 1042, Laboratory glassware One-mark volumetric flasksISO 1183-2, Plastics Methods for determining the density of non-cellular plastics Part 2: Density gradient column methodISO 23529, Rubber Gener
48、al procedures for preparing and conditioning test pieces for physical test methods3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia:
49、 available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp3.1metric yieldunstretched length, in metres, of 1 000 g of the thread ISO 2017 All rights reserved 1BS ISO 2321:2017ISO 2321:2017(E)3.2densitymass per unit volume of a test piece of thread measured at a standard laboratory temperatureNote 1 to entry: It is expressed in grams per cubic centimetre.Note 2 to entry: The standard laboratory temperatures are given in ISO 23529.3.3tensile st
