1、BRITISH STANDARD BS ISO 9727-4:2007 Cylindrical cork stoppers Physical tests Part 4: Determination of dimensional recovery after compression ICS 55.100; 79.100 BS ISO 9727-4:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BS
2、I 2007 ISBN 978 0 580 52943 6 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 9727-4:2007. 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
3、 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 legal obligations. Amendments issued since publication Amd. No. Dat
4、e Comments Reference number ISO 9727-4:2007(E)INTERNATIONAL STANDARD ISO 9727-4 First edition 2007-05-15 Cylindrical cork stoppers Physical tests Part 4: Determination of dimensional recovery after compression Bouchons cylindriques en lige Essais physiques Partie 4: Dtermination du taux de retour di
5、mensionnel aprs compression BS ISO 9727-4:2007ii 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 committees. E
6、ach 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 Internati
7、onal 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 Standa
8、rds 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 subject
9、 of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 9727-4 was prepared by Technical Committee ISO/TC 87, Cork. This first edition of ISO 9727-4, together with the other parts of ISO 9727:2007, cancels and replaces ISO 9727:1991, which has been tec
10、hnically revised. ISO 9727 consists of the following parts, under the general 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: Determ
11、ination of dimensional recovery after compression Part 5: Determination of extraction force Part 6: Determination of liquid tightness Part 7: Determination of dust content BS ISO 9727-4:2007 blank1 Cylindrical cork stoppers Physical tests Part 4: Determination of dimensional recovery after compressi
12、on 1 Scope This part of ISO 9727 specifies a test method for determining the percentage of diameter recovery of cylindrical cork stoppers, after compression. It is applicable to all types of cylindrical cork stoppers ready for use or semi-worked, intended to be completely inserted in the bottle neck
13、 (straight cork stoppers). 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 (including any amendments) applies.
14、 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 straight cork stopper ras de bague stopper which is completely introduced in the bottle neck, its superior end reaching the top border of the b
15、ottle 4 Apparatus 4.1 Vernier gauge, with a constant contact force and a maximum resolution of 0,05 mm, or any other device allowing the same precision to be reached. 4.2 Bottling machine with 4 jaws, with a jaw compression diameter regulated between 15,5 mm and 16 mm. 5 Test conditions 5.1 Environm
16、ent The test shall be carried out in an environment with the following characteristics: temperature 21 C 4 C; relative humidity of air 60 % 20 %. BS ISO 9727-4:20072 5.2 Cork stoppers 5.2.1 Temperature At the beginning of the test, confirm that the stoppers of the test sample are at a temperature of
17、 21 C 4 C. 5.2.2 Humidity At the beginning of the test, confirm that the stoppers of the test sample are at a humidity of 6 % 2 %. When the humidity is not between 4 % and 8 %, the result of the humidity obtained shall be referred to in the test report. 6 Sampling From each lot, take the quantity of
18、 stoppers that correspond to the sampling plan previously agreed between the interested parties. Stoppers from the sample shall not show visible defects that may interfere with the performance of the measurement, namely: stoppers with an abnormal shape (asymmetric, truncated, bevelled); stoppers wit
19、h gutters or belly irregularities. 7 Procedure Before testing, each stopper shall be numerated. Measure the diameter of each stopper from the sample with the vernier gauge (4.1). The diameter of natural cork stoppers is measured at the perpendicular to the cork growth layers. Measurements are carrie
20、d out according to ISO 9727-1. Register the result. The result of this first measurement is called D 1 . Using a pen or any other appropriate object, mark the contact points of the vernier gauge stand on the stopper. Introduce the stopper into the bottling machine (4.2). Compress the stopper (diamet
21、er of compression jaws between 15,5 mm and 16 mm). Then eject the stopper, as though this happens during bottling. Take the stopper from the bottling machine jaws. Three minutes later, measure the stopper diameter again, on the marked contact points. Register the value obtained. The result of this s
22、econd measurement is called D 2 . 8 Results The percentage of diameter recovery after compression of the stopper is given by the equation: 2 1 100 D D rounded off to the nearest unit. The final test result is the arithmetic average of the results obtained with each stopper from the test sample, expr
23、essed in percentage, rounded off to the nearest unit, and also the standard deviation. BS ISO 9727-4:20073 9 Test report The test report shall include the following information: a) a reference to this part of ISO 9727; b) complete identification of the sample, including its type and origin; c) sampl
24、ing report; d) results obtained; e) any deviation from this part of ISO 9727 that may have affected the results. BS ISO 9727-4:2007BS ISO 9727-4:2007 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Stan
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