1、BSI Standards PublicationBS ISO 2000:2014Rubber, raw natural Guidelines for the specificationof technically specified rubber(TSR)BS ISO 2000:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 2000:2014. It supersedes BS ISO 2000:2003 which is withdrawn.The UK
2、 participation in its preparation was entrusted to Technical Committee PRI/50, Rubber - Raw, natural and synthetic, including latex and carbon black.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
3、necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 68542 2ICS 83.040.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standa
4、rd was published under the authority of the Standards Policy and Strategy Committee on 30 June 2014.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 2000:2014 ISO 2014Rubber, raw natural Guidelines for the specification of technically specified rubber (TSR)Caoutchouc
5、naturel brut Lignes directrices pour la spcification de caoutchoucs spcifis techniquement (TSR)INTERNATIONAL STANDARDISO2000Seventh edition2014-06-15Reference numberISO 2000:2014(E)BS ISO 2000:2014ISO 2000:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved
6、. 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 either ISO at
7、 the address below or ISOs member 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 2000:2014ISO 2000:2014(E) ISO 2014 All rights reserved iiiConten
8、ts PageForeword ivIntroduction v1 Scope .12 Normative references 13 Terms and definitions .14 Material composition . 25 Grade structure 26 Specification of requirement . 27 Sampling 38 Packaging . 3BS ISO 2000:2014ISO 2000:2014(E)ForewordISO (the International Organization for Standardization) is a
9、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 has the right to be represented
10、 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.The procedures used to develop thi
11、s 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 editorial rules of the ISO/IEC Di
12、rectives, 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 rights identified during the deve
13、lopment 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 explanation on the meaning of ISO
14、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 document is ISO/TC 45, Rubber and
15、rubber products, Subcommittee SC 3, Raw materials (including latex) for use in the rubber industry.This seventh edition cancels and replaces the sixth edition (ISO 2000:2003), which has been technically revised with the following changes: the normative references were updated in Clause 2 and in Tabl
16、e 2; a grade of low viscosity in TSR (LoV) was added in Table 1; the gel content property was added in Table 2, with reference to the new test method described in ISO 17278.iv ISO 2014 All rights reservedBS ISO 2000:2014ISO 2000:2014(E)IntroductionSince the initial development of ISO 2000, when requ
17、irements for raw natural rubber were first specified, a number of different grades have become available, and significant developments have taken place in the supply of raw natural rubber, especially in relation to constant-viscosity (CV) grades. Rather than continuing to closely specify a limited n
18、umber grades, possibly restricting future developments, a more open approach is appropriate, providing guidance and assistance to those parties (such as producers, suppliers, and purchasers) involved in the specification of requirements for technically specified rubber rather than imposing potential
19、ly inappropriate limits on the TSR available.This International Standard encompasses rubbers that are typically more closely defined elsewhere. In more precise specifications, reference may need to be made to such specifications in particular cases. ISO 2014 All rights reserved vBS ISO 2000:2014BS I
20、SO 2000:2014Rubber, raw natural Guidelines for the specification of technically specified rubber (TSR)1 ScopeThis International Standard provides guidance on the specification of technically specified rubber (TSR). A grading system is proposed, based on the origin of the natural rubber content and o
21、n properties exhibited by the rubber.This International Standard is intended for use by parties involved in the procurement of TSR, and is intended to form a basis from which requirements for a particular case may be more closely specified. As such, it describes a number of criteria that need to be
22、the subject of appropriate agreement between the interested parties.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references,
23、 the latest edition of the referenced document (including any amendments) applies.ISO 247, Rubber Determination of ashISO 248-1, Rubber, raw Determination of volatile-matter content Part 1: Hot-mill method and oven methodISO 249, Rubber, raw natural Determination of dirt contentISO 289-1, Rubber, un
24、vulcanized Determinations using a shearing-disc viscometer Part 1: Determination of Mooney viscosityISO 1656, Rubber, raw natural, and rubber latex, natural Determination of nitrogen contentISO 1795, Rubber, raw natural and raw synthetic Sampling and further preparative proceduresISO 2007, Rubber, u
25、nvulcanized Determination of plasticity Rapid-plastimeter methodISO 2930, Rubber, raw natural Determination of plasticity retention index (PRI)ISO 4660, Rubber, raw natural Colour index testISO 17278, Rubber, raw natural Determination of the gel content of technically specified rubber (TSR)3 Terms a
26、nd definitionsFor the purposes of this document, the following terms and definitions apply.3.1technically specified rubberTSRnatural rubber obtained from the latex of Hevea brasiliensis (typically processed into block rubber), and having properties complying with the criteria for the grade concerned
27、INTERNATIONAL STANDARD ISO 2000:2014(E) ISO 2014 All rights reserved 1BS ISO 2000:2014ISO 2000:2014(E)3.2constant viscosity (CV) rubbernatural rubber whose viscosity is controlled, typically by treating it with viscosity-stabilizing agents, prior to or after the drying process3.3dirtforeign matter r
28、etained on the sieve as described in ISO 2493.4field-grade coagulumnatural rubber obtained from acid-coagulated latex or from latex naturally coagulated (i.e. by autocoagulation) in tapping cups or other suitable vessels3.5sheet rubbertypically, rubber which has been deliberately coagulated and shee
29、tedNote 1 to entry: It may be dried, partially dried, or undried.3.6whole field latexlatex material derived from Hevea brasiliensis which may be diluted but is not fractionated4 Material compositionTSR shall be divided into the following three principal groups based on the raw materials used: bulked
30、 field latex coagulated with a coagulant, such as formic acid or acetic acid under controlled conditions; field-grade coagulum; sheet rubber.5 Grade structureThe grade of the TSR shall be based on the properties of the TSR and the type of material used in its production (see Table 1).Table 1 Grade o
31、f TSRRaw material Characteristics GradesWhole field latex With controlled viscosityLight-coloured rubber, with a specified colour indexWith no specified viscosity or colourCV or LoVL WFSheet rubber or coagulated bulked field latexWith no specified viscosity or colour 5 or 5SField-grade coagulum and/
32、or sheet rubber With no specified viscosityWith controlled viscosity10 or 2010 CV or 20 CV6 Specification of requirementAny specific values for physical and chemical properties shall be based upon the grade (see Table 2).2 ISO 2014 All rights reservedBS ISO 2000:2014ISO 2000:2014(E)Table 2 Typical p
33、roperties of TSRPropertiesGradeaTest methodLoV CV L WF 5 10 20 10 CV 20 CVColour coding, markerGreen Green Green Green Green Brown Red Brown RedDirt retained on the sieve maximum % (mass fraction)0,05 0,05 0,05 0,05 0,05 0,10 0,20 0,10 0,20 ISO 249Ash maximum % (mass fraction)0,5 0,5 0,5 0,5 0,6 0,7
34、5 1,0 0,75 1,0 ISO 247Nitrogen content maximum % (mass fraction)0,3 0,6 0,6 0,6 0,6 0,6 0,6 0,6 0,6 ISO 1656Volatile-matter con-tent maximum % (mass fraction)0,8 0,8 0,8 0,8 0,8 0,8 0,8 0,8 0,8 ISO 248-1Initial plasticity (Po) minimumN/A N/A 30 30 30 30 30 N/A N/A ISO 2007Plasticity retention index
35、(PRI) minimumN/A 60 60 60 60 50 40 50 40 ISO 2930Lovibond colour index maximumN/A N/A 6 N/A N/A N/A N/A N/A N/A ISO 4660Mooney viscosity, ML(1 + 4) at 100 C55 10b60 5bN/A N/A N/A N/A N/A 6557+c6557+cISO 289-1Gel content maxi-mum % (mass fraction)4,0 dN/A N/A N/A N/A N/A N/A N/A N/A ISO 17278aThe raw
36、 material is given in Table 1.bOther viscosity levels might be agreed between the interested parties.cThe viscosity of these grades is not specified as it can change with, for example, age and handling. However, the viscosity will typically be controlled at the producers end to a value of 6557+. Oth
37、er viscosity levels might be agreed between the interested parties.dOther gel content levels might be agreed between the interested parties.7 SamplingTSR shall be sampled in accordance with ISO 1795, unless otherwise agreed between the interested parties.Each sample derived from the lot shall comply
38、 with the requirements agreed for that grade of TSR.8 PackagingTSR should normally be packaged in bales of nominal mass 33,3 kg or 35 kg (tolerance 0,5 %).NOTE 1 Since 30 bales of 33,3 kg make up a tonne, it can be the preferred size.Each bale shall be identified, marked, and ISO 2014 All rights res
39、erved 3BS ISO 2000:2014ISO 2000:2014(E) wrapped either in polyethylene film having a preferred thickness of 30 m to 50 m and a Vicat softening point lower than 95 C or in some other form of packaging as agreed between the interested parties.NOTE 2 On agreement between the interested parties, a maxim
40、um thickness of 65 m can be used especially if the removal of the packaging film is desired.4 ISO 2014 All rights reservedBS ISO 2000:2014BS ISO 2000:2014ISO 2000:2014(E) ISO 2014 All rights reservedICS 83.040.10Price based on 4 pagesThis page deliberately left blankBSI is the national body responsi
41、ble for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. British Standards and other standardization products are published by BSI Standards Limited.British Standards Institution (BSI)BSI Group Headquarters389 Chiswi
42、ck High Road London W4 4AL UKAbout usWe bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions.The knowledge embodied in our standards has been carefully assembled in a dependable format and ref
43、ined through our open consultation process. Organizations of all sizes and across all sectors choose standards to help them achieve their goals.Information on standardsWe can provide you with the knowledge that your organization needs to succeed. Find out more about British Standards by visiting our
44、 website at or contacting our Customer Services team or Knowledge Centre.Buying standardsYou can buy and download PDF versions of BSI publications, including British and adopted European and international standards, through our website at where hard copies can also be purchased. If you need intern
45、ational and foreign standards from other Standards Development Organizations, hard copies can be ordered from our Customer Services team.SubscriptionsOur range of subscription services are designed to make using standards easier for you. For further information on our subscription products go to Br
46、itish Standards Online (BSOL) youll have instant access to over 55,000 British and adopted European and international standards from your desktop. Its available 24/7 and is refreshed daily so youll always be up to date. You can keep in touch with standards developments and receive substantial discou
47、nts on the purchase price of standards, both in single copy and subscription format, by becoming a BSI Subscribing Member. PLUS is an updating service exclusive to BSI Subscribing Members. You will automatically receive the latest hard copy of your standards when theyre revised or replaced. To find
48、out more about becoming a BSI Subscribing Member and the benefits of membership, please visit a Multi-User Network Licence (MUNL) you are able to host standards publications on your intranet. Licences can cover as few or as many users as you wish. With updates supplied as soon as theyre available,
49、you can be sure your documentation is current. For further information, email .RevisionsOur British Standards and other publications are updated by amendment or revision. We continually improve the quality of our products and services to benefit your business. If you find an inaccuracy or ambiguity within a British Standard or other BSI publication please inform the Knowledge
