NTERNATIONAL STANDARD (TSO) 3060 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEK.IYHAPOIHAg OPrAHW3ALIMG HO CTAHIAPTW3ALIWIN.ORGANISATION INTERNATIONALE DE NORMALISATION Cotton fibres -- Determination of breaking tenacity of flat bundles Fibres de coton -- Détermination de la ténacité de rupture des faisceaux plats First edition -- 1974-07-01 ISO 3060-1974 (E) UDC 677.21 : 620.172 Ref. No. IS0 3060-1974 (E) Descriptors : textiles, natural fibres, cotton fibres, tests, mechanical tests, tension.tests, breaking load, determination. Price based on 6 pages Copyright Intenational Oorganizatin for Standardization Not for Resale FOREWORD IsO (the International Organization for Standardization) is a worldwide federation of national standards institutes (IsO Member Bodies). The work of developing International Standards is carried out through isO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up 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. Draft International Standards adopted by the Technica! Committees are circulated to the Member Bodies for approval before their acceptance as international Standards by the isO Council. Standard iS0 3060 was drawn up by Technical Committee International ISO/TC 38, Textiles, and circulated to the Member Bodies in March 1973. It has been approved by the Member Bodies of the following countries : Hungary Romania Australia Belgium South Africa, Rep. of India Brazil Ireland Spain Sweden Bulgaria Israel Japan Switzerland Canada Czechoslovakia Netherlands Thailand Turkey Egypt, Arab Rep. of New Zealand Norway Finland United Kingdom Poland U.S.A. France The Member Body of the following country expressed disapproval of the document on technical grounds : Germany @ International Organization for Standardization, 1974 Printed in Switzerland Copyright International Organization for Standardization Not for Resale without license from IHS ISO 3060-1974 (E) INTERNATIONAL STANDARD Cotton fibres -- Determination of breaking tenacity of flat bundles O INTRODUCTION 3 DEFINITIONS It is difficult and time consuming to estimate the average 3.1 gauge length : The length of a specimen under breaking tenacity of samples of cotton from tests on individual fibres. For both commercial and technical of hoiding clamps in their starting position at the beginning purposes, quicker 'estimates may be obtained from de- of the test. terminations made on flat bundles of parallel fibres. in this procedure, short fibres are combed out and the measured 3.2 breaking load : The maximum load (or force) applied fibre strength corresponds with the breaking strength of the to a specimen in a tensile test carried to rupture. longer fibres in the sample. The bundles of fibres may be secured by clamps which are 3.3 tensile strength : The strength shown by a specimen either in close contact (zero gauge length) or separated to subjected to tension, as distinct from torsion, compression give a specified nominal gauge length. Fibre strength testing or shear,and expressed as force per unit cross-sectional area at zero gauge length is current commercial practice, of the unstrained specimen. although some investigations suggest that tests at a gauge length of 3,2 mm are more closely related to the tenacity of 3.4 tenacity : The tensile force per unit of linear density many classes of cotton yarn. of the unstrained specimen, expressed in centinewtons per tex Internationai Calibration Cotton Standards for zero gauge and national Calibration Cotton Standards for 3,2 mm 3.5 breaking tenacity : The tenacity corresponding to the gauge have been established to enable different operators to breaking ioad. adjusttheirpersonal levels of testingtoanagreedcommon level. These standards may also be used by operators to 4 APPARATUS AND MATERIALS adjust the level of test results obtained