BS ISO 126-2005 Natural rubber latex concentrate - Determination of dry rubber content《天然胶乳浓缩物 干橡胶含量的测定》.pdf
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1、BRITISH STANDARD BS ISO 126:2005 Natural rubber latex concentrate Determination of dry rubber content ICS 83.040.10 BS ISO 126:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 April 2005 BSI 21 April 2005 ISBN 0 580 45891 1 National fo
2、reword This British Standard reproduces verbatim ISO 126:2005 and implements it as the UK national standard. It supersedes BS 6057-3.4:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/50, Rubber raw, natural and synthetic, including latex and
3、carbon black, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the
4、 section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct applicati
5、on. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monito
6、r related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 4, an inside back cover and a back cover. The BSI copyright notice displayed
7、in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 126:2005(E) OSI 5002INTERNATIONAL STANDARD ISO 126 Fifth edition 2005-04-01 Natural rubber latex concentrate Determination of dry rubber content Latex de caou
8、tchouc naturel concentr Dtermination de la teneur en caoutchouc sec BSISO126:2005IS:621 O5002(E) DPlcsid Fremia ihTs PDF file may ctnoian emdebt dedyfepcaes. In ccaocnadrw eith Aebods licensilop gnic,y this file mairp eb ynted iv roweb detu slahl ton ide ebtlnu deess the typefaces whice era hml era
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11、leratit gno it is f,dnuo plsaee inform ttneC ehlar Secrteiraat ta the serddaig sleb nevwo. ISO 5002 All irthgs erse.devr lnUeto sswrehise specified, on trap fo this lbupictaion maeb y cudorperro de tuilizi den yna form ro na ybm ynae,s lecetrinoc ro mecinahcal, inclidung tohpcoiypodna gn micrfoilm,
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13、 Allr ithgsr esedevrBSISO126:2005IS:621 O5002(E) I SO 5002 All irthgs ersedevr iiiForeword 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 throug
14、h 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 organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborat
15、es closely with the International 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 Standard
16、s. 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 least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of thi
17、s document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 126 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
18、fifth edition cancels and replaces the fourth edition (ISO 126:1995), which has been technically revised and a statement of the precision of the method added. BSISO126:2005blank 5002:621OSISBINTENRATIONAL TSANDADR IS:621 O5002(E)I SO 5002 All irthgs ersedevr 1Natural rubber latex concentrate Determi
19、nation of dry rubber content WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard 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 safe
20、ty and health practices and to ensure compliance with any national regulatory conditions. 1 Scope This International Standard specifies a method for the determination of the dry rubber content of natural rubber latex concentrate. The method is not necessarily suitable for latices preserved with pota
21、ssium hydroxide, latices from natural sources other than Hevea brasiliensis, or for compounded latex, vulcanized latex or artificial dispersions of rubber and it is not applicable to synthetic rubber latices. 2 Normative references The following referenced documents are indispensable for the applica
22、tion of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including amendments) applies. ISO 123, Rubber latex Sampling ISO 124, Latex, rubber Determination of total solids content ISO/TR 9272, Rubber and rubbe
23、r products Determination of precision for test method standards 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 natural rubber latex concentrate natural rubber latex containing ammonia and/or other preservatives and which has been subjected t
24、o some process of concentration 4 Principle A test portion of latex concentrate is diluted to 20 % (by mass) total solids content and acidified with acetic acid. The coagulated rubber is then formed into a sheet and dried at 70 C 5 C. BSISO126:2005IS:621 O5002(E) 2 I SO 5002 All irthgs ersedevr5 Rea
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