1、Designation: D 5252 05Standard Practice forthe Operation of the Hexapod Tumble Drum Tester1This standard is issued under the fixed designation D 5252; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A num
2、ber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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
3、 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 betw
4、eenthe purchaser and supplier to set purchasing specifications.1.4 The values stated in either SI or inch-pound units are tobe regarded separately as the standard. Within the text, theinch-pound units are shown in parentheses. The values in eachsystem must be used independently of the other. Combini
5、ngvalues from the two systems may result in nonconformancewith this practice. In case of referee decisions, the SI units shallprevail.1.5 This practice does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this practice to esta
6、blish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 123 Terminology Relating to TextilesD 1776 Practice for Conditioning and Testing TextilesD 5684 Terminology Relating to Pile Floor Cover
7、ing3. Terminology3.1 For all terminology related to Pile Floor Coverings,D13.21, see Terminology D 5684.3.1.1 The following terms are relevant to this standard:carpet, finished, finished pile yarn floor covering, floor cover-ing, lengthwise direction, pile, pile lay, pile yarn floor cover-ing, pitch
8、, practice, primary backing, secondary backing,textile floor covering, texture, tufted fabric.3.2 For all other terminology related to textiles see Termi-nology D 123.4. Summary of Practice4.1 The specimen is secured to a backing sheet that ismounted inside the rotatable drum with the pile surfaceex
9、posed. 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 b
10、y mechanical action.6. Apparatus, Materials, and Reagent6.1 Hexapod Tumble Tester6.1.1 DrumConstructed of polyvinyl chloride (PVC) andcapped by a lid that is secured by a metal plate and wing nut.The drum base and lid have a locating groove to hold thespecimen backing sheet flat to the inner wall of
11、 the drum. Thedrum dimensions are:Internal Diameter 305 6 1mm (126 0.01 in.)Wall Thickness 8 mm approx. (0.3 in.approx.)Internal Depth 200 6 1mm (7.96 0.01 in.)6.1.2 Driving System, which cradles the drum on rollers andkeeps the axis of the drum level, and rotates at 3.6 6 0.2 rad/s(35 6 2 rpm). The
12、 driving direction reverses every 15 min withapproximately one-minute stationery time intervals.6.1.3 Hexapod TumblerCompromised of a mild steel 506 1 mm (1.97 6 0.04 in.) cube with 25-mm (1-in.) thick plateswelded to each side. The outside corners are welded such thatwhen the studs are fitted and t
13、he hexapod placed on a flatsurface, no metal touches the flat surface. A replaceable stud4is screwed centrally in each face. Tumbler parameters are:Diameter of Stud 40 6 1mm (1.66 0.04 in.)Height of Stud 15 6 1mm (0.66 0.04 in.)Edge of Radius Stud 156 1mm (0.66 0.04 in.)Steel Backing for Polyurethan
14、eStud Hardness 80 6 10 Type A DurometerStud Thickness 3 6 0.25 mm (0.12 6 0.01 in.)1This 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 March 1, 2005. Published April 2005. Or
15、iginallyapproved in 1992. Last previous edition approved in 2003 as D 5252 98a(2003).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
16、page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Total mass of hexapod tumbler with six studs is 3.8 6 0.1kg. (8.4 6 0.2 lb).6.2 Specimen Backing Sheet, polyethylene approx.950 3 215 3 2 mm (approx. 375 3 8.5 3
17、 0.08 in.).6.3 Tape, double-sided adhesive, 50 mm (2.0 in.) width.6.4 Vacuum CleanerAn upright type vacuum cleaner,with a rotating brush and beater bar, unless this type ofapparatus is not recommended by the manufacturer of the pilefloor covering under test, in which case the appropriaterecommended
18、device should be used.6.5 Cleaning Frame, a rectangular frame approx.1000 3 300 mm (40 3 12 in.) with a central rectangularaperture approx. 940 3 200 mm (37 3 8 in) to receive the testspecimen, of material similar construction to the test specimenand mounted on a rigid backing sheet.6.6 SolventUse o
19、nly ethyl alcohol, or isopropylalcohol,technical grade.7. Preparation of Specimen7.1 Marking SpecimenBefore cutting out the test speci-men, mark on the backing the direction of manufacture withthe head of the arrow pointing in the same direction as the layof the pile.7.2 Size of SpecimenCut the spec
20、imen approx. 940 3 200mm (37 3 8 in.) with the long dimension parallel to thelengthwise direction of the pile yarn floor covering. Take nospecimen within 100 mm (4.0 in.) of the trimmed selvedge.Alternatively, up to four smaller specimens of similar thicknessmay be tested together, although if this
21、is done, the effect offiber or finish must be considered. If this is the case, cut thespecimen to allow for a 5-mm (0.2-in.) gap between eachspecimen, and ensure that the pile lay is in the same direction.7.3 Cleaning of SpecimenPrior to testing, vacuum thespecimen to remove any loose tufts or fiber
22、s.7.4 Specimen AttachmentAttach the double-sided adhe-sive tape along each side and across the end of the specimenbacking sheet leaving 5 mm (0.2 in.) clear at each edge,pressing down firmly to ensure adhesion. If testing multiplespecimens, attach an additional strip tape at each cross junc-tion. Mo
23、unt the specimen pile surface uppermost, allowing a 5mm (0.2 in.) gap at the end and between 5 to 10 mm (0.2 to 0.4in.) between specimens to allow space for the pile when thebacking sheet is curved to fit the drum.8. Conditioning8.1 Bring the specimen to moisture equilibrium for testingin the standa
24、rd atmosphere for testing textiles approachingequilibrium from the dry side without the use of heat. Deter-mine that moisture equilibrium for testing has been attained asdirected in Practice D 1776.9. Procedure9.1 Perform this practice on a specimen prepared as de-scribed in Section 8, maintaining t
25、he Hexapod Tumble DrumTester in the standard atmosphere for testing textiles.9.2 Wipe the hexapod tumbler and the inside of the drumwith a clean lint free tissue and one of the recommendedsolvents.9.3 Inspect the studs on the hexapod tumbler for signs ofwear or damage. Replace the studs when severe
26、wear isapparent. Place the hexapod tumbler with new studs on the pilesurface drum tester and allow to tumble for a minimum of 4 hprior to regular testing.9.4 Ensure that the specimen lies smoothly around theinternal circumference when the backing sheet is curved to fitthe drum and that it is firmly
27、held in place by the locatinggrooves. If necessary, adjust the specimen length.9.5 Place the hexapod tumbler in the drum on the specimensurface.9.6 Secure the lid to the drum and position the drum on therollers of the drive mechanism. Ensure that the drum is level.9.7 Set the revolution counter for
28、2,000 revolutions. Whenthe machine stops, remove the mounted specimen and place inthe central aperture of the cleaning frame.9.8 Using the upright vacuum cleaner, make four forwardand four backward passes along the length of the mountedspecimen ensuring all the area is covered and the final pass isi
29、n the lay of the pile.9.9 Return the mounted specimen to the drum and repeat9.4-9.8 until the required number has been completed.10. Report10.1 State that the tester was operated as directed in PracticeD 5252.10.2 Report the following information:10.2.1 The number of revolutions.10.2.2 The type of v
30、acuum cleaner used.10.2.3 Detail any deviations from this practice.11. Keywords11.1 appearance; carpet; floor covering; hexapod; pile yarnASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this st
31、andard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years a
32、ndif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee,
33、 which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D5252052
