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1、BRITISH STANDARD BS ISO 20299-3:2008 Film 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 83.040.01 ? Copyright British Standards I
2、nstitution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:23:25 MDTNo reproduction or networking permitted without license from IHS -,-,- BS ISO 20299-3:2008 This British Standard was published under the authority of the Standar
3、ds Policy and Strategy Committee on 30 April 2008 BSI 2008 ISBN 978 0 580 58323 0 National foreword This 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 la
4、tex 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 necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cann
5、ot confer immunity from legal obligations. Amendments/corrigenda issued since publication DateComments Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:23:25 MDTNo reproduction or networking
6、 permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 20299-3 First edition 2008-03-01 Reference number ISO 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)
7、, 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 20
8、299-3:2008 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:23:25 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Copyright British Standards Institution Provide
9、d by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:23:25 MDTNo reproduction or networking permitted without license from IHS -,-,- iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national
10、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. International
11、 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. International Standards are drafted in accordance with the rules g
12、iven in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at leas
13、t 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 patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20299-3 was prepared by Technical Committee ISO/TC 45
14、, Rubber and rubber products, Subcommittee SC 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 rubber bales: Part 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR) Part 2: Natural rubber
15、Part 3: Ethylene-propylene-diene rubber (EPDM), acrylonitrile-butadiene rubber (NBR), hydrogenated nitrile-butadiene rubber (HNBR), acrylic-ethylene rubber (AEM) and acrylic rubber (ACM) BS ISO 20299-3:2008 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled
16、 Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:23:25 MDTNo reproduction or networking permitted without license from IHS -,-,- iv Introduction Considerable quantities of synthetic rubber are prepared in crumb form. The crumbs are dried and then pressed into bales whilst still warm
17、, at approximately . The bales are then wrapped in a film and packed, often automatically, into crates. The wrapping film should be strong enough to withstand the stresses encountered during the wrapping and packing operations. It should not adhere to the film on the other bales under the combined e
18、ffects of the heat from the rubber and the weight of the bales. During storage, the rubber will flow and the film should be able to withstand the stresses generated. Any failure of the film causes rubber-to-rubber adhesion, which in a 30-bale crate leads to a “one-tonne bale”. The prime purpose of t
19、he film is to keep the bales separate at all times, so that they may be easily removed from their 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 mean
20、s that its melting point has to be lower than the temperatures attained in internal mixing cycles, typically to . 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 inte
21、rnal mixer cycle might not reach the required temperature for dispersion. If this happens, then an option would be to strip the film from the bales or to use a lower melting point film if this is practical. 60 C 120 C 160 C BS ISO 20299-3:2008 Copyright British Standards Institution Provided by IHS
22、under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:23:25 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 Film for wrapping rubber bales Part 3: Ethylene-propylene-diene rubber (EPDM), acrylonitrile- butadiene rubber (NBR
23、), hydrogenated nitrile-butadiene rubber (HNBR), acrylic-ethylene rubber (AEM) and acrylic rubber (ACM) WARNING 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 w
24、ith its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1Scope This part of ISO 20299 specifies the material and physical property requirements for non-strippable film for wrapping genera
25、l-purpose synthetic rubber bales and intended to keep the bales separate during storage. It concerns wrapping film for the following types of rubber: ethylene-propylene-diene rubber (EPDM); acrylonitrile-butadiene rubber (NBR); hydrogenated nitrile-butadiene rubber (HNBR); acrylic-ethylene rubber (A
26、EM); acrylic rubber (ACM). Certain applications and processing methods require the removal of the film. This part of ISO 20299 does not deal with strippable films. 2Normative references The following referenced documents are indispensable for the application of this document. For dated references, o
27、nly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 306:2004, Plastics Thermoplastic materials Determination of Vicat softening temperature (VST) ISO 1872-1:1993, Plastics Polyethylene (PE) moulding and extrusio
28、n materials Part 1: Designation system and basis for specifications ISO 4591, 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 calorimetr
29、y (DSC) Part 3: Determination of temperature and enthalpy of melting and crystallization BS ISO 20299-3:2008 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:23:25 MDTNo reproduction or netw
30、orking permitted without license from IHS -,-,- 2 3Material The 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; or d)copol
31、ymers of ethylene having a content of other 1-olefinic monomers of less than and a content of non-olefinic monomers with functional groups up to a maximum of (see ISO 1872-1:1993, 1.3). NOTEAntioxidants, slip agents and anti-blocking agents may be present. 4Physical properties 4.1Thickness When meas
32、ured by a gravimetric technique as specified in ISO 4591, the film shall have a thickness between and for materials a), b) and c) in Clause 3 and between and for material d), although a thickness of to may be used instead if dispersion of the film during mixing poses problems. 4.2Thermal properties
33、4.2.1General It is sufficient to satisfy only one of the following two thermal-property requirements. 4.2.2Vicat softening temperature When determined in accordance with ISO 306:2004, method A50, the Vicat softening temperature shall be equal to or less than . 4.2.3Peak melting temperature by DSC Wh
34、en determined in accordance with ISO 11357-3, the peak melting temperature shall be less than (Vicat softening temperature ). 5Test report The 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 sam
35、ple; c)any unusual features noted during the determinations; d)the results obtained from the tests specified in Clause 4; e)the date of testing. 50 % (m/m) 3 % (m/m) 0,040 mm0,070 mm0,040 mm0,085 mm 0,025 mm0,040 mm 95 C 113 C +18 C BS ISO 20299-3:2008 Copyright British Standards Institution Provide
36、d by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:23:25 MDTNo reproduction or networking permitted without license from IHS -,-,- blank Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Lic
37、ensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:23:25 MDTNo reproduction or networking permitted without license from IHS -,-,- BS ISO 20299-3:2008 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing Briti
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