ASTM_D_7255_-_22e1.pdf

Designation:D7255221Standard Test Method forAbrasion Resistance of Leather(Rotary Platform,AbraserMethod)1This standard is issued under the fixed designation D7255;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.1NOTEFigure X2.1,Visual Grading Scale,was updated editorially to show better contrast in November 2022.1.Scope*1.1 This test method covers the determination of the abra-sion resistance of leather using the rotary platform abraser.NOTE1This test method is similar but not equivalent to ISO 17076-1,and results should not be directly compared between the two methods.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1517 Terminology Relating to LeatherD1610 Practice for Conditioning Leather and Leather Prod-ucts for TestingD2813 Practice for Sampling Leather for Physical andChemical TestsG195 Guide for Conducting Wear Tests Using a RotaryPlatform Abraser2.2 Other Standards:3ISO 17076-1 Leather-Determination of abrasion resistancePart 1-Taber method3.Terminology3.1 Definitions:3.1.1 abrasera wear testing instrument,also referred to asa rotary platform tester or abrader.3.1.2 abrasionthe wearing away of any part of a materialby rubbing against another surface.3.1.3 abrasion cyclein abrasion testing,one or moremovements of the abradant across a material surface,or thematerial surface across the abradant,that permits a return to itsstarting position.In the case of the rotary platform test method,it consists of one complete rotation of the specimen.3.1.4 durabilitythe ability to withstand deterioration orwear out in use,including the effects of abrasion.3.1.5 resurfacethe preparation of an abrasive wheel on arefacing disc or diamond tool wheel refacer,prior to use intesting.3.2 For definitions of other leather terms used in this testmethod,refer to Terminology D1517.4.Summary of Test Method4.1 Aspecimen is abraded using rotary rubbing action undercontrolled conditions of pressure and abrasive action.The testspecimen,mounted on a turntable platform,turns on a verticalaxis,against the sliding rotation of two abrading wheels.Oneabrading wheel rubs the specimen outward toward the periph-ery and the other,inward toward the center,while a vacuumsystem removes wear debris generated during the test.Theresulting abrasion marks form a pattern of crossed arcs over anarea of approximately 30 cm2.Resistance to abrasion isevaluated by visual inspection of damage to the specimen orchange in mass,as described in Section 14.1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.07 on Physical Properties.Current edition approved April 1,2022.Published May 2022.Originallyapproved in 2006.Last previous edition approved in 2020 as D7255 20.DOI:10.1520/D7255-22E01.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.15.Significance and Use5.1 The resistance of leather to abrasion,as measured on atesting machine in the laboratory,is generally only one ofseveral factors contributing to wear performance or durabilityas experienced in the actual use of the material.While“abrasion resistance”(often stated in terms of the number ofabrasion cycles)and“durability”are frequently related,therelationship varies with different end uses an