ASTM_D_6611_-_16.pdf

Designation:D661116Standard Test Method forWet and Dry Yarn-on-Yarn Abrasion Resistance1This standard is issued under the fixed designation D6611;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes the measurement of abrasionresistance properties for manufactured fiber yarns in dry andwet conditions.1.2 This test method applies to manufactured yarns used inrope making.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses are provided forinformation only.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD2904 Practice for Interlaboratory Testing of a Textile TestMethod that Produces Normally Distributed Data(With-drawn 2008)3D3412 Test Method for Coefficient of Friction,Yarn to YarnD6477 Terminology Relating to Tire Cord,Bead Wire,HoseReinforcing Wire,and Fabrics3.Terminology3.1 The following terms are relevant to this standard:abrasion,apex angle,applied tension,cycles to failure(CTF),dry,rope,wet.3.2 For terminology related to industrial fibers and metallicreinforcements,see Terminology D6477.3.3 For definitions of other textile terms used in this testmethod,refer to Terminology D123.4.Summary of Test Method4.1 A length of yarn is interwrapped in contact with itselfbetween three pulleys that are positioned in a defined geometryto produce a specific intersection angle.Aweight is attached toone end of the yarn to apply a prescribed tension.The other endis drawn back and forth through a defined stroke at a definedspeed until the yarn fails due to abrasion upon itself within theinterwrapped region.The yarn abrasion test can be conductedin either the dry state or the wet state.5.Significance and Use5.1 This test method is intended for testing dry and wetabrasion resistance of manufactured fiber yarns.This testmethod is especially useful for ropes intended for use in themarine environment.The test method has been used with yarnshaving linear densities ranging from 70 to 300 tex,but may beused with yarns outside these ranges.5.2 Yarn to yarn friction is known to have a significantinfluence on abrasion resistance.To determine the coefficientof friction,use Test Method D3412.5.3 Limited interlaboratory correlation testing has beenconducted to date.Single-laboratory testing,in accordancewith ASTM practices,has now been conducted.Test resultsshould be used with caution.5.4 This test method is intended to provide additional datafor specific applications such as mentioned in 5.1 and is notintended for quality control or test reports.5.5 If there are differences of practical significance betweenreported test results for two or more laboratories,comparativetests should be performed to determine if there is a statisticalbias between them,using competent statistical assistance.As aminimum the test samples used should be as homogeneous aspossible,be drawn from the material from which the disparatetest results were obtained,and be randomly assigned in equalnumbers to each laboratory for testing.Other materials withestablished test values may be used for this purpose.The testresults from the two or more laboratories should be compared1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.19 on Industrial Fibers andMetallic Reinforcements.Current edition approved July 1,2016.Published August 2016.Originallyapproved in 2000.Last previous edition approved in 2007 as D661100(2007)which was withdrawn Jan.2016 and reinstated in July 2016.DOI:10.1520/D6611-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 using a statistical test for unpaired data,at a probability levelchosen prior to testing.If a bias is found,either its cause mustbe found and corrected,or future test results must be adjustedin consideration of the known bias.5.6 This test method is conducted at one or several appliedtensions that may depend upon the yarn material and size.Thenumber and magnitudes of applied tensions and the number ofeight specimen