1、BRITISH STANDARD BS ISO 9727-3:2007 Cylindrical cork stoppers Physical tests Part 3: Determination of humidity content ICS 55.100; 79.100 BS ISO 9727-3:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2007 ISBN 978 0 580
2、52944 3 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 9727-3:2007. The UK participation in its preparation was entrusted to Technical Committee PRI/81, Cork. A list of organizations represented on this committee can be obtained on request to its sec
3、retary. 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 issued since publication Amd. No. Date Comments Reference n
4、umber ISO 9727-3:2007(E)INTERNATIONAL STANDARD ISO 9727-3 First edition 2007-05-15 Cylindrical cork stoppers Physical tests Part 3: Determination of humidity content Bouchons cylindriques en lige Essais physiques Partie 3: Dtermination du taux dhumidit BS ISO 9727-3:2007ii iii Foreword ISO (the Inte
5、rnational 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 committees. Each member body interested in a subject for which a technical committee has
6、 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 International Electrotechnical Commission (IEC) on all matters of electrotechnical s
7、tandardization. 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 Standards adopted by the technical committees are circulated to the member bodies
8、 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 subject of patent rights. ISO shall not be held responsible for identifying any or
9、 all such patent rights. ISO 9727-3 was prepared by Technical Committee ISO/TC 87, Cork. This first edition of ISO 9727-3, together with the other parts of ISO 9727:2007, cancels and replaces ISO 9727:1991, which has been technically revised. ISO 9727 consists of the following parts, under the gener
10、al title Cylindrical cork stoppers Physical tests: Part 1: Determination of dimensions Part 2: Determination of mass and apparent density for agglomerated cork stoppers Part 3: Determination of humidity content Part 4: Determination of dimensional recovery after compression Part 5: Determination of
11、extraction force Part 6: Determination of liquid tightness Part 7: Determination of dust content BS ISO 9727-3:2007 blank1 Cylindrical cork stoppers Physical tests Part 3: Determination of humidity content 1 Scope This part of ISO 9727 specifies a test method for determining the humidity content of
12、cylindrical cork stoppers, ready for use or semi-worked. 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, the latest edition of the referenced document (incl
13、uding any amendments) applies. ISO 633, Cork Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 633 and the following apply. 3.1 constant mass mass of a stopper submitted to a drying operation is called constant when the difference between tw
14、o consecutive weighings does not differ by more than 10 mg 4 Apparatus 4.1 Long method 4.1.1 Balance, with a resolution less than or equal to 0,001 g. 4.1.2 Desiccator, with a hygroscopic salt and a saturation indicator. 4.1.3 Ventilated oven, at 103 C 4 C. 4.2 Quick method 4.2.1 Specific device to
15、measure resistivity, with two electrodes adapted to the cork material and that can be checked through a standard resistance (4.2.2). 4.2.2 Standard resistance. BS ISO 9727-3:20072 5 Test conditions 5.1 Environment The test shall be carried out in an environment with the following characteristics: te
16、mperature 21 C 4 C; relative humidity of air 60 % 20 %. 5.2 Cork stoppers At the beginning of the test, and using the quick method (7.2) confirm that the stoppers of the test sample are at a temperature of 21 C 4 C. 6 Sampling From each lot, take the quantity of stoppers that correspond to the sampl
17、ing plan previously agreed between the interested parties. 7 Procedure 7.1 Long method Identify each stopper. Weigh each stopper with the balance (4.1.1). Register the result. Place the unbroken stoppers in the oven regulated to 103 C 4 C (4.1.3) for 24 h. Agglomerated cork stoppers with one or more
18、 discs of natural cork glued onto one end shall be separated into their parts, agglomerated body and discs, before going into the oven. Take the stoppers (or parts of stoppers) out of the oven and place them in the desiccator (4.1.2) for, at a minimum, 30 min. Weigh each stopper (or part of the stop
19、per whenever it is an agglomerated cork stopper with one or more discs of natural cork glued onto one end). Register the result. Put the stoppers (or parts of stoppers) back in the oven for 2 h. Take the stoppers (or parts of stoppers) out of the oven and place them in the desiccator for 30 min. Wei
20、gh each stopper (or part of a stopper). If the difference between the mass obtained and the previous one is superior to 10 mg, repeat the procedure until two consecutive weighing do not differ by more than 10 mg. 7.2 Quick method The test is described for each stopper. Repeat the test with each stop
21、per from the global sample. Regulate the scale of the device (4.2.1) to “cork”, if several options are available. Thrust the electrodes once, in the middle of the stoppers, 4 mm to 6 mm deep into the cylinder, in the cross- direction to the cork-layer growth of natural cork stoppers, the two electro
22、des defining a plan parallel to the stopper length. BS ISO 9727-3:20073 Do not thrust electrodes into visible defects of the stopper, as the measurement performance may be affected. When the measurement is carried out inside discs of agglomerated cork stoppers with one or more discs glued onto one e
23、nd, the method used to thrust the electrodes in shall be included in the test report. Read either the value, if it is shown on the device, or the measurement, reported from the device standard curve. Register the result. 8 Results 8.1 Long method The humidity content, H, of a stopper, expressed in p
24、ercentage, is given by the equation: 12 1 () 100 mm H m = where m 1is the initial mass of the stopper, before drying; m 2is the mass of the stopper, after drying. The result per stopper is rounded off to the nearest 0,1 %. 8.2 Quick method Humidity, read on or determined from the curve of the device
25、 to measure resistivity, is expressed in percentage, rounded off in accordance with the following principle: EXAMPLE 6 to 6,4 = 6; 6,5 to 7 = 7. 8.3 Final result Whatever the method used, the test result is the arithmetic average of the results obtained with each stopper of the test sample, expresse
26、d in percentage, rounded off to 0,1 %, and also the standard deviation and the maximum and minimum results rounded off to 0,1. 9 Test report The test report shall include the following information: a) a reference to this part of ISO 9727, specifying which of the two described methods was used; b) co
27、mplete identification of the sample, including its type and origin; c) sampling report; d) results obtained; e) any deviation from this part of ISO 9727 that may have affected the results. BS ISO 9727-3:2007BS ISO 9727-3:2007 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution
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