1、BRITISH STANDARD BS EN ISO 3671:1999 BS 2782-4: Method 461A: 1978 Implementing Amendment No. 1 to BS 2782-4: method 461A:1978 (renumbers the BS as BSENISO3671:1999) not published separately Plastics Aminoplastic moulding materials Determination of volatile matter The European Standard EN ISO 3671:19
2、98 has the status of a British Standard ICS 83.080.10BSENISO3671:1999 This British Standard, having been prepared under the directionof the Plastics StandardsCommittee, was published under the authority ofthe Executive Board on 31 May 1978 BSI 03-2000 The following BSI references relate to the work
3、on this standard: Committee reference PLC/17 Draft for comment 77/50785 DC ISBN 0 580 10201 7 National foreword This British Standard is the English language version of EN ISO 3671:1998. Terminology and conventions. Some terminology and certain conventions are not identical with those used in Britis
4、h Standards; attention is especially drawn to the following. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard,
5、they should be interpreted as “British Standard”. Additional information. In applying the procedure described in clause 4, it is preferable to remove the covers of the weighing bottles before placing them in the desiccator to cool. This precaution avoids the creation of a partial vacuum in the bottl
6、es which could prevent the removal of the covers. WARNING NOTE. This British Standard method, which is identical with EN ISO 3671, does not necessarily detail all precautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974. Attention should be paid to any appropriat
7、e safety precautions, and the method should be operated only by trained personnel. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itsel
8、f confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN ISOtitle page, pages 2 and 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be ind
9、icated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date of issue Comments 10345 April 1999 Implementation of the European StandardBSENISO3671:1999 BSI 03-2000 i Contents Page National foreword Inside front cover Foreword 2 Text of EN ISO 3671 3ii bl
10、ankEUROPEAN STANDARD NORME EUROPENE EUROPISCHE NORM EN ISO 3671 August 1998 ICS 83.080.10 Descriptors: See ISO document Englishversion Plastics Aminoplastic moulding materials Determination of volatile matter (ISO 3671:1976) Matires plastiques Matires mouler aminoplastes Dtermination des matires vol
11、atiles (ISO 3671:1976) Kunststoffe Aminoplast-Formmassen Bestimmung der flchtigen Anteile (ISO 3671:1976) This European Standard was approved by CEN on 12 June 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Stan
12、dard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French,
13、 German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark
14、, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1
15、050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3671:1998 EENISO3671:1998 BSI 03-2000 2 Foreword The text of the International Standard from Technical Committee ISO/TC 61, Plastics, of the International Organi
16、zation for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC 249, Plastics, the Secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at
17、the latest by February 1999, and conflicting national standards shall be withdrawn at the latest by February 1999. According to CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepu
18、blic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 3671:1976 has been approved by CEN as a European Standard without any
19、modification. Contents Page Foreword 2 1 Scope and field of application 3 2 Apparatus 3 3 Storage of sample 3 4 Procedure 3 5 Expression of results 3 6 Test report 3ENISO3671:1998 BSI 03-2000 3 1 Scope and field of application This International Standard specifies a method for the determination of v
20、olatile matter (predominantly water) in aminoplastic moulding materials, by drying in an oven. 2 Apparatus 2.1 Two wide-mouthed weighing bottles, of internal diameter 45 mm and depth 35 mm, provided with tight-fitting covers. 2.2 Well-ventilated oven, capable of being controlled at 55 1 C. 2.3 Balan
21、ce, with an accuracy of 0,001 g. 3 Storage of sample Store the sample in an airtight container prior to testing, to prevent the loss or gain of water or other volatile matter. 4 Procedure Weigh 5 0,1 g of the sample to the nearest 0,001 g into a clean dried weighing bottle (2.1) and spread evenly ov
22、er the bottom of the weighing bottle. Conduct the test in duplicate. Place the bottles, with covers removed, in the oven(2.2), controlled at 55 1 C. After a period of3h, close the weighing bottles, remove from the oven and place in a desiccator at room temperature. After a period of at least 1 h, ea
23、se the covers of the weighing bottles to equalize pressure, and reweigh the bottles. 5 Expression of results The volatile matter is given, as a percentage by mass, by the formula where m 0 is the original mass of the test portion; m 1 is the loss in mass of the test portion. Calculate the arithmetri
24、c mean of the two determinations. 6 Test report The test report shall include the following particulars: a) reference to this International Standard: b) complete identification of the product tested; c) the volatile matter content as the arithmetic mean of the two determinations; d) the individual r
25、esults of the two determinations. m 1 m 0 -100 BS EN ISO 3671:1999 BS2782-4: Method 461A: 1978 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and a
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