BS-ISO-8009-5-1996.pdf

BRITISH STANDARD BS ISO 8009-5:1996 Reusable rubber contraceptive diaphragms Part 5: Determination of tensile properties ICS 11.200 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8009-5:1996 This British Standard, having been prepared under the direction of the Health and Environment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1997 © BSI 09-1999 ISBN 0 580 27889 1 National foreword This British Standard reproduces verbatim ISO 8009-5:1996 and implements it as the UK national standard. Together with BS ISO 8009-1 to BS ISO 8009-4 and BS ISO 8009-6 to BS ISO 8009-10, it supersedes BS 4028:1989 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CH/30, Mechanical contraceptives, which has the responsibility to: 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; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. 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 itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, pages ii to iv, page 1 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8009-5:1996 © BSI 09-1999i Contents Page National forewordInside front cover Forewordiii Text of ISO 8009-51 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8009-5:1996 ii © BSI 09-1999 Contents Page Forewordiii 1Scope1 2Normative reference1 3Principle1 4Apparatus1 5Preparation of test piece1 6Procedure1 7Expression of results1 8Test report1 Descriptors: Birth control, contraceptives, contraceptive devices, reusable equipment, caps (contraceptives), tests, mechanical tests, determination, tensile properties. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8009-5:1996 © BSI 09-1999iii 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. 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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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. International Standard ISO 8009-5 was prepared by Technical Committee ISO/TC 157, Mechanical contraceptives. This second edition cancels and replaces the first edition (ISO 8009-5:1985), of which it constitutes a minor revision. ISO 8009 consists of the following parts, under the general title Reusable rubber contraceptive diaphragms. Part 1: Classification, sampling and requirements; Part 2: Determination of size; Part 3: Determination of dome thickness; Part 4: Freedom from visible defects; Part 5: Determination of tensile properties; Part 6: Determination of deterioration after accelerated ageing; Part 7: Determination of compression resistance of coil spring and flat spring diaphragms; Part 8: Determination of twisting during compression of coil spring and flat spring diaphragms; Part 9: Packaging and labelling; Part 10: Recommendations for storage. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8009-5:1996 © BSI 09-19991 1 Scope This part of ISO 8009 specifies a method for determining the tensile properties of the dome of reusable rubber contraceptive diaphragms. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this part of ISO 8009. At the time of the publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this part of ISO 8009 are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 8009-3:1985, Reusable rubber contraceptive diaphragms Part 3: Determination of dome thickness. 3 Principle A test piece is cut from the dome of a diaphragm and stretched until it breaks. The tensile force and elongation at break are measured. 4 Apparatus 4.1 Die, for cutting rings having an internal circumference of 100 mm ± 0,5 mm and a radial width of 2 mm ± 0,02 mm. 4.2 Dial gauge, as specified in ISO 8009-3. 4.3 Tensile testing machine, capable of an essentially constant rate of traverse and complying with the following requirements: a) able to apply a force ranging from 0 to 50 N; b) having two roller test specimen holders; the diameters of the rollers should be approximately 15 mm; c) having a roller separation speed of (8,5 ± 0,8) mm/s (500 ± 50) mm/min. 5 Preparation of test piece From the dome of each diaphragm to be tested, cut a ring-shaped test piece using the cutting die (4.1). The test piece shall be obtained by cutting with one stroke of the press. Only test pieces which have been completely separated at the first attempt shall be used. 6 Procedure 6.1 Using the dial gauge measure, to the nearest 0,01 mm, the thickness of the disc remaining from the inside of the test ring cut from the dome. Take the median value of three measurements, made at different locations close to the edge of the disc, to use in 7.1. 6.2 Place the test piece over the rollers of the tensile testing machine, and stretch it until it breaks. 6.3 Measure the force at break to the nearest 0,1 N and the separation distance between the centres of the rollers to the nearest millimetre. 7 Expression of results 7.1 The tensile strength, Ö, expressed in megapascals, of each test piece is given by the formula where The result shall be rounded to the nearest megapascal. 7.2 The elongation at break, E, expressed as a percentage, of each test piece is given by the formula where The result shall be rounded to the nearest 10 %. 8 Test report The test report shall include the following information: a) identification of the sample; b) number of samples tested; c) tensile strength and elongation at break of each test piece; d) date of testing. Fis the breaking force, in newtons; wis the width of the test piece (i.e. 2 mm); tis the thickness of the test piece, in millimetres. Cis the internal circumference of the ring (i.e. 100 mm); Dis the final distance between the centres of the rollers, in millimetres; Gis the circumference of the roller, in millimetres. Ö F 2 wt - -= E 2 DGC+ C - - × 100= Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:11:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8009-5:1996 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. 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