ASTM_D_5823_-_13.pdf

Designation:D582313Standard Test Method forTuft Height of Pile Floor Coverings1This standard is issued under the fixed designation D5823;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 covers the determination of tuft heightusing a grooved specimen holder.It applies to cut-pile andloop-pile floor covering after adhesive backing has beenapplied to bond the pile yarn to the backing fabric.1.2 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.1.3 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 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 TextilesD1909 Standard Table of Commercial Moisture Regains forTextile FibersD5684 Terminology Relating to Pile Floor CoveringsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or Process3.Terminology3.1 For all terminology related to Pile Floor Coverings,D13.21,refer to Terminology D5684.3.1.1 The following terms are relevant to this standard:finished,finished pile yarn floor covering,floor covering,levelpile,loop pile yarn floor covering,pile,pile yarn floorcovering,textile floor covering,tuft height,tuft leg,tuftedfabric.3.2 For all other terminology related to textiles see Termi-nology D123.4.Summary of Test Method4.1 For cut pile floor covering,individual tuft leg specimensof like character(either cut or loop and of uniform height)arecut as closely as possible to the surface of the backing of a pilefloor covering sample and placed,one at a time,in a groovedspecimen holder that maintains the tuft yarn in a straight linewhile the length of the tuft leg is measured using a graduatedscale and a magnifying glass.4.2 For loop pile floor covering,the two tuft legs formingthe loop are each severed from the adjacent binding sites at thebacking surface to provide a specimen of twice the tuft heightand the length measured as in 4.1.5.Significance and Use5.1 This test method is useful in quality and cost controlduring the manufacture of pile yarn floor covering.Bothappearance and performance can be affected by changes in thetuft height.5.1.1 In case of a dispute arising from differences inreported test results when using this test method for acceptancetesting of commercial shipments,the purchaser and the sup-plier should conduct comparative tests to determine if there isa statistical bias between their laboratories.Competent statis-tical assistance is recommended for the investigation of bias.As a minimum,the two parties should take a group of testspecimens that are as homogeneous as possible and are from alot of material of the type in question.The test specimensshould then be randomly assigned in equal numbers to eachlaboratory for testing.The average results from the twolaboratories should be compared using Students t-test forunpaired data and an acceptable probability level chosen by thetwo parties before testing is begun.If a bias is found,either itscause must be found and corrected or the purchaser and thesupplier must agree to interpret future test results in view of theknown bias.6.Apparatus6.1 Grooved Specimen Holder,having a length at least 10%longer than the longest tuft element to be measured.6.1.1 Specimen Holder,4-in.(100-mm)long,has beenfound satisfactory for this purpose.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.Current edition approved July 1,2013.Published August 2013.Originallyapproved in 1995.Last previous edition approved in 2005 as D582305a.DOI:10.1520/D5823-13.2For 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 States1 6.1.2 The grooves shall have a V-shaped cross-section witha 1.05 rad(60)angle at the bottom and widths across the topto accommodate several size yarns as follows:Yarn BulkGroove WidthsCoarse0.18 in.(4.6 mm)Medium0.13 in.(3.3 mm)Fine0.08 in.(2.0 mm)6.1.3 Additional grooves of intermediate width may also beused.6.2 Tuft Cutting Device,blade capable of cutting tuft