1、BRITISH STANDARDBS ISO 20299-3:2008Film for wrapping rubber bales Part 3: Ethylene-propylene-diene rubber (EPDM), acrylonitrile-butadiene rubber (NBR), hydrogenated nitrile-butadiene rubber (HNBR), acrylic-ethylene rubber (AEM) and acrylic rubber (ACM)ICS 83.040.01g49g50g3g38g50g51g60g44g49g42g3g58g
2、44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 20299-3:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2
3、008 BSI 2008ISBN 978 0 580 58323 0National forewordThis British Standard is the UK implementation of ISO 20299-3:2008. 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 repr
4、esented 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.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments
5、/corrigenda issued since publicationDate CommentsINTERNATIONALSTANDARDISO20299-3First edition2008-03-01Reference numberISO 20299-3:2008(E)Film for wrapping rubber bales Part 3:Ethylene-propylene-diene rubber (EPDM), acrylonitrile-butadiene rubber (NBR), hydrogenated nitrile-butadiene rubber (HNBR),
6、acrylic-ethylene rubber (AEM) and acrylic rubber (ACM)Emballage des balles en caoutchouc Partie 3: Caoutchouc thylne-propylne-dine (EPDM), caoutchouc butadine-acrylonitrile (NBR), caoutchouc butadine-nitrile hydrogn (HNBR), caoutchouc thylne acrylique (AEM) et caoutchouc acrylique (ACM)BS ISO 20299-
7、3:2008ii iiiForewordISO (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 ISOtechnical committees. Each member body interested in a subject for
8、which a technical committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all m
9、atters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circul
10、ated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISO shall not be held responsible
11、for identifying any or all such patent rights.ISO 20299-3 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, SubcommitteeSC 3, Raw materials (including latex) for use in the rubber industry.ISO 20299 consists of the following parts, under the general title Film for wrapping r
12、ubber bales: Part 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR) Part 2: Natural rubber Part 3: Ethylene-propylene-diene rubber (EPDM), acrylonitrile-butadiene rubber (NBR), hydrogenatednitrile-butadiene rubber (HNBR), acrylic-ethylene rubber (AEM) and acrylic rubber (ACM)BS ISO 20299-3
13、:2008ivIntroductionConsiderable quantities of synthetic rubber are prepared in crumb form. The crumbs are dried and then pressedinto bales whilst still warm, at approximately . The bales are then wrapped in a film and packed, oftenautomatically, into crates.The wrapping film should be strong enough
14、to withstand the stresses encountered during the wrapping andpacking operations. It should not adhere to the film on the other bales under the combined effects of the heatfrom the rubber and the weight of the bales. During storage, the rubber will flow and the film should be able towithstand the str
15、esses generated. Any failure of the film causes rubber-to-rubber adhesion, which in a 30-balecrate 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 fromtheir packaging for use. However, because it is difficult an
16、d uneconomic to strip the film from each bale, anessential feature is that the film should disperse in the rubber compound during mixing. This means that itsmelting point has to be lower than the temperatures attained in internal mixing cycles, typically to.Unfortunately, there is no acceptable or r
17、eproducible dispersal test available to measure this important propertydirectly.Mixes carried out on a two-roll mill or in a single-stage internal mixer cycle might not reach the requiredtemperature for dispersion. If this happens, then an option would be to strip the film from the bales or to use a
18、lower melting point film if this is practical.60C120C160CBS ISO 20299-3:20081Film for wrapping rubber bales Part 3:Ethylene-propylene-diene rubber (EPDM), acrylonitrile-butadiene rubber (NBR), hydrogenated nitrile-butadiene rubber (HNBR), acrylic-ethylene rubber (AEM) and acrylic rubber (ACM)WARNING
19、 Persons 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 itsuse. It is the responsibility of the user to establish appropriate safety and health practices and toensu
20、re compliance with any national regulatory conditions.1ScopeThis part of ISO 20299 specifies the material and physical property requirements for non-strippable film forwrapping general-purpose synthetic rubber bales and intended to keep the bales separate during storage.It concerns wrapping film for
21、 the following types of rubber: ethylene-propylene-diene rubber (EPDM); acrylonitrile-butadiene rubber (NBR); hydrogenated nitrile-butadiene rubber (HNBR); acrylic-ethylene rubber (AEM); acrylic rubber (ACM).Certain applications and processing methods require the removal of the film. This part of IS
22、O 20299 does notdeal with strippable films.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendme
23、nts) applies.ISO 306:2004, Plastics Thermoplastic materials Determination of Vicat softening temperature (VST)ISO 1872-1:1993, Plastics Polyethylene (PE) moulding and extrusion materials Part 1: Designationsystem and basis for specificationsISO 4591, Plastics Film and sheeting Determination of avera
24、ge thickness of a sample, and averagethickness and yield of a roll, by gravimetric techniques (gravimetric thickness)ISO 11357-3, Plastics Differential scanning calorimetry (DSC) Part 3: Determination of temperature andenthalpy of melting and crystallizationBS ISO 20299-3:200823MaterialThe film shal
25、l 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;ord) copolymers of ethylene having a content of other 1-olefinic monomers of less th
26、an and acontent of non-olefinic monomers with functional groups up to a maximum of (seeISO 1872-1:1993, 1.3).NOTE Antioxidants, slip agents and anti-blocking agents may be present.4 Physical properties4.1 ThicknessWhen measured by a gravimetric technique as specified in ISO 4591, the film shall have
27、 a thickness betweenand for materials a), b) and c) in Clause 3 and between and formaterial d), although a thickness of to may be used instead if dispersion of the film duringmixing poses problems.4.2 Thermal properties4.2.1 GeneralIt is sufficient to satisfy only one of the following two thermal-pr
28、operty requirements.4.2.2 Vicat softening temperatureWhen determined in accordance with ISO 306:2004, method A50, the Vicat softening temperature shall beequal to or less than .4.2.3 Peak melting temperature by DSCWhen determined in accordance with ISO 11357-3, the peak melting temperature shall be
29、less than (Vicat softening temperature ).5 Test reportThe test report shall include the following:a) a reference to this part of ISO 20299, i.e. ISO 20299-3;b) all details necessary for the identification of the sample;c) any unusual features noted during the determinations;d) the results obtained f
30、rom the tests specified in Clause 4;e) the date of testing.50 % (m/m)3%(m/m)0,040 mm 0,070 mm 0,040 mm 0,085 mm0,025 mm 0,040 mm95C113C+ 18CBS ISO 20299-3:2008blankBS ISO 20299-3:2008BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsibl
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