1、Film for wrapping rubber balesPart 2: Natural rubberBS ISO 202992:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017Film for wrapping rubber bales Part 2: Natural rubberEmballage des balles en caoutchouc Partie 2: Caoutchouc naturelINTERNATIONAL STANDARDIS
2、O20299-2Second edition2017-06Reference numberISO 20299-2:2017(E)National forewordThis British Standard is the UK implementation of ISO 202992:2017.The UK participation in its preparation was entrusted to Technical Committee PRI/50, Raw materials (including latex) for use in the rubber industry.A lis
3、t of organizations represented on this committee can be obtained on request 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 L
4、imited 2017ISBN 978 0 580 85579 5ICS 83.040.01Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2017.Amendments/corrigenda issued since publicationDate Tex
5、t affectedBRITISH STANDARDBS ISO 202992:2017 ISO 2017Film for wrapping rubber bales Part 2: Natural rubberEmballage des balles en caoutchouc Partie 2: Caoutchouc naturelINTERNATIONAL STANDARDISO20299-2Second edition2017-06Reference numberISO 20299-2:2017(E)BS ISO 202992:2017ISO 20299-2:2017(E)ii ISO
6、 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, 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 th
7、e internet or an intranet, without prior 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 4
8、7copyrightiso.orgwww.iso.orgBS ISO 202992:2017ISO 20299-2:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, 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 me
9、ans, 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 body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-12
10、14 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgISO 20299-2:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Material 15 Physical properties 15.1 Thickness and specific gravity . 15.2 Thermal properties
11、 . 25.2.1 General 25.2.2 Vicat softening temperature 25.2.3 Differential scanning calorimeter - peak melting temperature . 26 Marking 27 Test report . 2 ISO 2017 All rights reserved iiiContents PageBS ISO 202992:2017ISO 20299-2:2017(E)ForewordISO (the International Organization for Standardization)
12、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 has the right to be repres
13、ented 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 develo
14、p 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 editorial rules of the ISO/I
15、EC 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 rights identified during
16、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 explanation on the volu
17、ntary nature of standards, the meaning of ISO 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 .ht
18、mlThis document was prepared by Technical Committee 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 20299-2:2006), which has been technically revised with the foll
19、owing changes: specification of the wrapping material and physical requirements of polyethylene film used for the packing of natural rubber bales comprising of either ribbed smoked sheets or block rubber; the scope has been updated accordingly; change of thickness and addition of specific gravity in
20、 5.1; change of the maximum peak melting temperature in 5.2.3; addition of a new Clause 6 on marking.A list of all parts in the ISO 20299 series can be found on the ISO website.iv ISO 2017 All rights reservedBS ISO 202992:2017ISO 20299-2:2017(E)ForewordISO (the International Organization for Standar
21、dization) 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 has the right to
22、 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.The procedures used
23、 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 editorial rules of
24、 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 rights identifi
25、ed 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 explanation o
26、n the voluntary nature of standards, the meaning of ISO 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/ fo
27、reword .htmlThis document was prepared by Technical Committee 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 20299-2:2006), which has been technically revised wit
28、h the following changes: specification of the wrapping material and physical requirements of polyethylene film used for the packing of natural rubber bales comprising of either ribbed smoked sheets or block rubber; the scope has been updated accordingly; change of thickness and addition of specific
29、gravity in 5.1; change of the maximum peak melting temperature in 5.2.3; addition of a new Clause 6 on marking.A list of all parts in the ISO 20299 series can be found on the ISO website.iv ISO 2017 All rights reserved ISO 20299-2:2017(E)IntroductionBlock natural rubber is prepared by comminuting la
30、rge lumps, washed with plenty of water. It is then dried, baled and packed. The bales are wrapped in clear polyethylene film and packed into metal or wooden crates.Bale coating on natural rubber ribbed smoked sheet bundles is to prevent stickiness between bales, fungus formation on the external side
31、s and also to allow the stencilling of the grade mark and supplier code. The bale coating solution is a non-reinforcing filler which has no benefit in product manufacturing. Excess bale coating generate ash, which adversely affects the quality of end products and also creates environmental issues.Sh
32、ifting to polyethylene wrapping is an alternative option that is beneficial to all, as it is cost effective, environmental friendly, pollution free and healthy practice. However, because it is difficult and uneconomic to strip the film from each bale, an essential feature is that the film should dis
33、perse in the rubber compound during mixing. This means that its melting point has to be lower than the temperatures attained in internal mixing cycles, typically 120 C to 160 C. ISO 2017 All rights reserved vBS ISO 202992:2017BS ISO 202992:2017Film for wrapping rubber bales Part 2: Natural rubberWAR
34、NING Persons using this document should be familiar with normal laboratory practices. This document 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
35、nce with any national regulatory conditions.1 ScopeThis document specifies the material and physical property requirements for non-strippable low density polyethylene film for wrapping natural rubber bales comprising of block natural rubber of 33,33 kg or 35 kg and natural rubber ribbed smoked sheet
36、s including bales of 33,33 kg, 35 kg, 50 kg and 111,11 kg, or any other bale weights as mutually agreed between the parties, and intended to keep the bales separate during transportation and storage.2 Normative referencesThe following documents are referred to in the text in such a way that some or
37、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 306:2013, Plastics Thermoplastic materials Determination of Vicat softeni
38、ng temperature (VST)ISO 11357-3, Plastics Differential scanning calorimetry (DSC) Part 3: Determination of temperature and enthalpy of melting and crystallization3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in stand
39、ardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp4 MaterialThe film shall be manufactured from low-density polyethylene (PE-LD).NOTE Slip agents, anti-oxidants and anti-blo
40、cking agents are normally not included.5 Physical properties5.1 Thickness and specific gravityWhen measured using a micrometer screw gauge, the film shall have a thickness between 0,03 mm and 0,05 mm and specific gravity of 0,92 0,01.INTERNATIONAL STANDARD ISO 20299-2:2017(E) ISO 2017 All rights res
41、erved 1BS ISO 202992:2017ISO 20299-2:2017(E)5.2 Thermal properties5.2.1 GeneralIt is sufficient to satisfy only one of the thermal property requirements.5.2.2 Vicat softening temperatureWhen tested in accordance with method A50 of ISO 306:2013, the Vicat softening temperature shall be equal to or le
42、ss than 95 C.NOTE The Vicat softening temperature is generally 18 C lower than the peak melting temperature as measured by DSC.5.2.3 Differential scanning calorimeter - peak melting temperatureWhen determined in accordance with ISO 11357-3, the differential scanning calorimeter - peak melting temper
43、ature shall be equal to or less than 113 C.6 MarkingEach bale shall be marked with the name of the manufacturer, near the splice area on the right side, using yellow colour letters with size 1 cm.The name of the dealer should be written in the middle of the bale, on both sides, using red colour lett
44、ers with size 5 cm.The inclusion of the marking specification, including location on the bale, colour and size of the lettering, shall be as agreed upon between the interested parties.7 Test reportThe test report shall include the following:a) a reference to this document;b) all details necessary fo
45、r the identification of the sample;c) any unusual features noted during the determinations;d) the results obtained from the tests specified in Clause 5;e) the date of the testing.2 ISO 2017 All rights reservedBS ISO 202992:2017ISO 20299-2:2017(E)5.2 Thermal properties5.2.1 GeneralIt is sufficient to
46、 satisfy only one of the thermal property requirements.5.2.2 Vicat softening temperatureWhen tested in accordance with method A50 of ISO 306:2013, the Vicat softening temperature shall be equal to or less than 95 C.NOTE The Vicat softening temperature is generally 18 C lower than the peak melting te
47、mperature as measured by DSC.5.2.3 Differential scanning calorimeter - peak melting temperatureWhen determined in accordance with ISO 11357-3, the differential scanning calorimeter - peak melting temperature shall be equal to or less than 113 C.6 MarkingEach bale shall be marked with the name of the
48、 manufacturer, near the splice area on the right side, using yellow colour letters with size 1 cm.The name of the dealer should be written in the middle of the bale, on both sides, using red colour letters with size 5 cm.The inclusion of the marking specification, including location on the bale, col
49、our and size of the lettering, shall be as agreed upon between the interested parties.7 Test reportThe test report shall include the following:a) a reference to this document;b) all details necessary for the identification of the sample;c) any unusual features noted during the determinations;d) the results obtained from the tests specified in Clause 5;e) the date of the testing.2 ISO 2017 All rights reservedBS ISO 202992:2017ISO 20299-2:2017(E) ISO 2017 All rights reservedICS 83.040.01Price b
