1、BSI Standards PublicationBS ISO 20299-1:2015Film for wrapping rubber balesPart 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR)BS ISO 20299-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 20299-1:2015. It supersedes BS ISO 20299-1:2006 which i
2、s withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/50, Rubber - Raw, natural and synthetic, including latex and carbon black.A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 t
3、o include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 89102 1 ICS 83.040.01 Compliance with a British Standard cannot confer immunity from legal obligation
4、s.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 20299-1:2015 ISO 2015Film for wrapping rubber bales Part 1: Butadiene rubber (BR) and styrene
5、-butadiene rubber (SBR)Emballage des balles en caoutchouc Partie 1: Caoutchouc butadine (BR) et caoutchouc styrne-butadine (SBR)INTERNATIONAL STANDARDISO20299-1Second edition2015-09-15Reference numberISO 20299-1:2015(E)BS ISO 20299-1:2015ISO 20299-1:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PR
6、OTECTED DOCUMENT ISO 2015, Published 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 pr
7、ior written permission. Permission can 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.orgBS ISO 20
8、299-1:2015ISO 20299-1:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Material 14 Physical properties 24.1 Thickness . 24.2 Thermal properties . 24.2.1 General 24.2.2 Vicat softening temperature 24.2.3 Differential scanning calorimetry . 25 Test report . 2 ISO 2015 All rights re
9、served iiiContents PageBS ISO 20299-1:2015ISO 20299-1:2015(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 commit
10、tees. 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 In
11、ternational 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 d
12、ifferent 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
13、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 ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this docume
14、nt is information given for the convenience of users and does not constitute an endorsement.For an explanation 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 (
15、TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee SC 3, Raw materials (including latex) for use in the rubber industry.This second edition cancels and replaces the first edition (ISO 2029
16、9-1:2006), of which it constitutes a minor revision to update the normative references, in Clause 2 and in the text. It also incorporates the Technical Corrigendum ISO 20299-1:2006/Cor.1:2008.ISO 20299 consists of the following parts, under the general title Film for wrapping rubber bales: Part 1: B
17、utadiene rubber (BR) and styrene-butadiene rubber (SBR) Part 2: Natural rubber Part 3: Ethylene-propylene-diene rubber (EPDM), acrylonitrile-butadiene rubber (NBR), hydrogenated nitrile-butadiene rubber (HNBR), acrylic-ethylene rubber (AEM) and acrylic rubber (ACM)iv ISO 2015 All rights reservedBS I
18、SO 20299-1:2015ISO 20299-1:2015(E)IntroductionConsiderable quantities of general-purpose synthetic rubber are prepared in crumb form. The crumbs are dried and then pressed into bales while still warm, at approximately 60 C. The bales are then wrapped in a film and packed, often automatically, into c
19、rates.The wrapping film should be strong enough to withstand the stresses encountered during the wrapping and packaging operations. It should not adhere to the film on the other bales under the combined effects of the heat from the rubber and the weight of the bales. During storage, the rubber will
20、flow and the film should be able to withstand the stresses generated. Any failure of the film will cause rubber-to-rubber adhesion, which in a 30-bale crate leads to a “one-tonne bale”.The prime purpose of the film is to keep the bales separate at all times so that they may be easily removed from th
21、eir packaging for use. However, because it is difficult and uneconomic to strip the film from each bale, an essential feature is that the film should disperse in the rubber compound during mixing. This means that its melting point has to be lower than the temperatures attained in internal mixing cyc
22、les, typically 120 C to 160 C.Unfortunately, there is no acceptable or reproducible dispersal test available to measure this important property directly.Mixes carried out on a two-roll mill or in a single-stage internal mixer cycle might not reach the required temperature for dispersion. If this hap
23、pens, then an option would be to strip the film from the bales or to use a lower melting point film if this is practical. ISO 2015 All rights reserved vBS ISO 20299-1:2015BS ISO 20299-1:2015Film for wrapping rubber bales Part 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR)WARNING Persons
24、 using this part of ISO 20299 should be familiar with normal laboratory practice. This part of ISO 20299 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 co
25、mpliance with any national regulatory conditions.1 ScopeThis part of ISO 20299 specifies the material and physical property requirements for non-strippable film for wrapping general-purpose synthetic rubber bales, intended to keep the bales separate during storage, for example for wrapping: styrene-
26、butadiene rubber (SBR); butadiene rubber (BR).Certain applications or processing methods require the removal of the film. This part of ISO 20299 does not deal with strippable films.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are
27、 indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 306:2013, Plastics Thermoplastic materials Determination of Vicat softening temperature (VST)ISO 4591
28、, Plastics Film and sheeting Determination of average thickness of a sample, and average thickness and yield of a roll, by gravimetric techniques (gravimetric thickness)ISO 11357-3, Plastics Differential scanning calorimetry (DSC) Part 3: Determination of temperature and enthalpy of melting and crys
29、tallization3 MaterialThe film shall be manufactured from one of the following:a) low-density polyethylene (polyethene) (PE-LD);b) low-density polyethylene blended with ethylene/vinyl acetate copolymer (EVAC);c) an appropriate grade of EVAC copolymer.NOTE Antioxidants, slip agents, and anti-blocking
30、agents may be present.INTERNATIONAL STANDARD ISO 20299-1:2015(E) ISO 2015 All rights reserved 1BS ISO 20299-1:2015ISO 20299-1:2015(E)4 Physical properties4.1 ThicknessWhen measured by gravimetric techniques as specified in ISO 4591, the film shall have a thickness between 0,035 mm and 0,065 mm.4.2 T
31、hermal properties4.2.1 GeneralIt is sufficient to satisfy only one of the following two thermal-property requirements.4.2.2 Vicat softening temperatureWhen determined in accordance with ISO 306:2013, method A50, the Vicat softening temperature shall be equal to or less than 95 C.4.2.3 Differential s
32、canning calorimetryWhen determined in accordance with ISO 11357-3, the peak melting temperature shall be less than 113 C (Vicat softening temperature +18 C).5 Test reportThe test report shall include the following:a) a reference to this part of ISO 20299, i.e. ISO 20299-1;b) all details necessary fo
33、r the identification of the sample;c) any unusual features noted during the determinations;d) the results obtained from the tests specified in Clause 4;e) the date of testing.2 ISO 2015 All rights reservedBS ISO 20299-1:2015BS ISO 20299-1:2015ISO 20299-1:2015(E) ISO 2015 All rights reservedICS 83.04
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