ASTM_D_6611_-_00_2007.pdf

Designation:D661100(Reapproved 2007)Standard 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)33.Terminology3.1 Definitions:3.1.1 abrasion,nthe wearing away of any part of amaterial by rubbing against another surface.3.1.2 apex angle,nthe angle formed between the incom-ing and outgoing yarn at the top(and bottom)of the inter-wrapped yarn area in the static condition(see Annex A1).3.1.2.1 DiscussionIn yarn abrasion testing,the state of ayarn,which has been soaked for a prescribed period of time inwater before testing and then immersed in water during theabrasion test.3.1.3 applied tension,nin yarn abrasion testing,the statictension exerted on the weighted end of the yarn by the appliedweight.3.1.3.1 DiscussionTension in the yarn varies along itslength during each cycle because of friction and dynamiceffects.The tension at any point in the interwrapped yarnregion and at any time may differ substantially from the appliedtension but is a function of that applied tension.3.1.4 cycles to failure,CTF,nin yarn abrasion testing,thenumber of cycles applied to the yarn before it fails due toabrasion.3.1.4.1 DiscussionFailure is considered to occur when theyarn is completely separated.3.1.5 dry,adjthe state of a yarn which has not beenexposed to excessive moisture.3.1.6 rope,na compact and flexible,generally torsionallybalanced continuous structure,greater than 4-mm(332-in.)diameter,capable of applying or transmitting tension betweentwo points.3.1.7 wet,adjthe state of a yarn which has been exposedto excessive moisture.3.2 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 the1This 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 Sept.15,2007.Published October 2007.Originallyapproved in 2000.Last previous edition approved in 2000 as D661100.DOI:10.1520/D6611-00R07.2For 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 marine 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 Limited interlaboratory correlation testing has beenconducted to date.Single-laboratory testing,in accordancewith ASTM practices,has now been conducted.Additionalinterlaboratory testing,in accordance with ASTM practices,will be conducted after approval of a definitive test method.Test results should be used with caution pending completion ofinterlaboratory testing.5.3 This test method is not recommended for acceptancetesting of commercial shipments in the absence of reliableinformation on between-laborator