ASTM_D_5252_-_20.pdf

Designation:D525220Standard Practice forthe Operation of the Hexapod Tumble Drum Tester1This standard is issued under the fixed designation D5252;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 practice describes the equipment and operation ofthe hexapod tumble drum tester for testing pile floor coveringto produce changes in appearance and color due to changes insurface structure by mechanical action tester.1.2 This practice is applicable for use in testing unused pilefloor covering of all types.It is not applicable for use in testingused pile yarn floor coverings.1.3 This practice may be used by mutual agreement betweenthe purchaser and supplier to set purchasing specifications.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 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.1.6 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:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD5684 Terminology Relating to Pile Floor Coverings3.Terminology3.1 For all terminology related to Pile Floor Coverings,D13.21,see Terminology D5684.3.1.1 The following terms are relevant to this standard:carpet,finished,finished pile yarn floor covering,floorcovering,lengthwise direction,pile,pile lay,pile yarn floorcovering,pitch,practice,primary backing,secondary backing,textile floor covering,texture,tufted fabric.3.2 For all other terminology related to textiles see Termi-nology D123.4.Summary of Practice4.1 The specimen is secured to a backing sheet that ismounted inside the rotatable drum with the pile surfaceexposed.A metal hexapod,with six polyurethane studs,rollsrandomly on the pile surface inside the rotating drum for aspecified number of revolutions.5.Significance and Use5.1 This equipment may be used to bring about the changesin appearance and texture on the surface of pile floor coveringcaused by mechanical action.6.Apparatus,Materials,and Reagent6.1 Hexapod Tumble Tester6.1.1 DrumConstructed of Nylon or other polymer mate-rial and capped by a lid that is secured by a latching device.The drum base and lid have a locating groove to hold thespecimen backing sheet flat to the inner wall of the drum.Aphotograph of a typical drum is shown in Fig.1 and Fig.2.Thedrum dimensions are:Internal Diameter12 0.18 in.(302 5 mm)Wall Thickness0.3 in.approx.(8 mm approx.)Internal Depth8.2 0.02 in.(207 5 mm)6.1.2 Driving System,cradles the drum on rollers and keepsthe axis of the drum level,and rotates the drum at 35 6 2 rpm(3.6 6 0.2 rad/s).The driving direction reverses after approxi-mately 500 revolutions.After the 500 rotations the unit willstop and stand stationary for approximately 5 to 15 s,thenbegin rotating in the opposite direction.After 2000 rotationsthe unit will stop and wait for the operator to restart the unit.6.1.3 Hexapod TumblerThere are two types of HexapodTumblers:the 2.8 lb(1270 g)or the 8.4 lb(3810 g)as specifiedbelow.The selection of which depends on the end use of thepile floor covering.NOTE1The 2.8 lb Residential Hexapod Tumbler is recommended for1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.Current edition approved Feb.1,2020.Published February 2020.Originallyapproved in 1992.Last previous edition approved in 2015 as D5252 15.DOI:10.1520/D5252-20.2For 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.Copyright 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.residential pile flo