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1、BRITISH STANDARD BS ISO 20299-1:2006 Incorporating corrigendum April 2008 Film for wrapping rubber bales Part 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR) ICS 83.040.01 ? Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing
2、 Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 23:09:55 MDTNo reproduction or networking permitted without license from IHS -,-,- BS ISO 20299-1:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 10 February 2006 BSI 2008 ISBN 9
3、78 0 580 62771 2 National foreword This British Standard is the UK implementation of ISO 20299-1:2006, incorporating corrigendum April 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 lis
4、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. Compliance with a British Standard cannot confer immunity from leg
5、al obligations. Amendments/corrigenda issued since publication DateComments 31 July 2008Implementation of ISO corrigendum April 2008. Text modified in 3a) and 4.1 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Ja
6、pan, IHS Not for Resale, 10/17/2008 23:09:55 MDTNo reproduction or networking permitted without license from IHS -,-,- Reference number ISO 20299-1:2006(E) INTERNATIONAL STANDARD ISO 20299-1 First edition 2006-01-15 Film for wrapping rubber bales Part 1: Butadiene rubber (BR) and styrene- butadiene
7、rubber (SBR) Emballage des balles en caoutchouc Partie 1: Caoutchouc butadine (BR) et caoutchouc styrne-butadine (SBR) BS ISO 20299-1:2006 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale,
8、 10/17/2008 23:09:55 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 23:09:55 MDTNo reproduction o
9、r networking permitted without license from IHS -,-,- iii Foreword ISO (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 committe
10、es. 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 Inte
11、rnational Electrotechnical Commission (IEC) on all matters 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 S
12、tandards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International 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 su
13、bject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20299-1 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. ISO 20299 consists of the
14、 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 Part 3: Ethylene-propylene-diene rubber (EPDM), nitrile-butadiene rubber (NBR), hydrogenated nitrile- butadiene rubber (HNBR), acrylic-eth
15、ylene rubber (AEM) and acrylic rubber (ACM) (in preparation) BS ISO 20299-1:2006 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 23:09:55 MDTNo reproduction or networking perm
16、itted without license from IHS -,-,- iv Introduction Considerable quantities of general-purpose synthetic rubber are prepared in crumb form. The crumbs are dried and then pressed into bales whilst still warm, at approximately 60 C. The bales are then wrapped in a film and packed, often automatically
17、, into crates. 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 rub
18、ber will 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 remov
19、ed 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 means that its melting point has to be lower than the temperatures attained in internal
20、mixing cycles, 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.
21、 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. BS ISO 20299-1:2006 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS
22、Not for Resale, 10/17/2008 23:09:55 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 Film for wrapping rubber bales Part 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR) WARNING Persons using this part of ISO 20299 should be familiar with normal laboratory pract
23、ice. 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 compliance with any national regulatory conditions. 1 Scope This part of ISO 20
24、299 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-butadiene rubber (SBR); butadiene rubber (BR). Certain applications or proce
25、ssing methods require the removal of the film. This part of ISO 20299 does not deal with strippable films. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, t
26、he latest edition of the referenced document (including any amendments) applies. ISO 306:2004, Plastics Thermoplastic materials Determination of Vicat softening temperature (VST) ISO 4591, Plastics Film and sheeting Determination of average thickness of a sample, and average thickness and yield of a
27、 roll, by gravimetric techniques (gravimetric thickness) ISO 11357-3, Plastics Differential scanning calorimetry (DSC) Part 3: Determination of temperature and enthalpy of melting and crystallization 3 Material The film shall be manufactured from one of the following: a) b) low-density polyethylene
28、blended with ethylene/vinyl acetate copolymer (EVAC); c) an appropriate grade of EVAC copolymer. NOTE Antioxidants, slip agents and anti-blocking agents may be present. BS ISO 20299-1:2006 low-density polyethylene (polyethene) (PE-LD); Copyright British Standards Institution Provided by IHS under li
29、cense with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 23:09:55 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 4 Physical properties 4.1 Thickness 0,035 mm and 0,065 mm. 4.2 Thermal properties 4.2.1 General It is suff
30、icient to satisfy only one of the following two thermal-property requirements. 4.2.2 Vicat softening temperature When determined in accordance with ISO 306:2004, method A50, the Vicat softening temperature shall be equal to or less than 95 C. 4.2.3 Differential scanning calorimetry When determined i
31、n accordance with ISO 11357-3, the peak melting temperature shall be less than 113 C (Vicat softening temperature +18 C). 5 Test report The test report shall include the following: a) a reference to this part of ISO 20299; b) all details necessary for the identification of the sample; c) any unusual
32、 features noted during the determinations; d) the results obtained from the tests specified in Clause 4; e) the date of testing. BS ISO 20299-1:2006 When measured as specified in ISO 4591, the film shall have a thickness between by gravimetric techniques Copyright British Standards Institution Provi
33、ded by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 23:09:55 MDTNo reproduction or networking permitted without license from IHS -,-,- blank Copyright British Standards Institution Provided by IHS under license with BSI - Un
34、controlled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 23:09:55 MDTNo reproduction or networking permitted without license from IHS -,-,- BS ISO 20299-1:2006 BSI Group Headquarters 389 Chiswick High Road, London W4 4AL, UK Tel +44 (0)20 8996 9001 Fax +44 (0)20 8996
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