ASTM_D_6702_-_01.pdf

Designation:D 6702 01Standard Test Method forDetermining the Dynamic Wiping Efficiency of NonwovenFabrics Not Used in Cleanrooms1This standard is issued under the fixed designation D 6702;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(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the quantifying of the dynamicwiping efficiency of nonwoven fabrics.1.2 This test method applies to all nonwoven fabrics notused in cleanrooms.NOTE1For dynamic wiping efficiency in cleanrooms,refer to TestMethod D 6650 Standard Test Method for Determining the DynamicWiping Efficiency,Wet Particle Removal Ability,and Fabric ParticleContribution of Nonwoven Fabrics Used in Cleanrooms.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as the standard.Within the text,the inch-pound units are shown in parentheses.The valuesstated in each system are not exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in nonconformancewith the specification.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 Documents2,32.1 ASTM Standards:D 123 Terminology Relating to Textiles4D 6650 Test Method for Determining the Dynamic WipingEfficiency,Wet Particle Removal Ability,and Fabric Par-ticle Contribution of Nonwoven Fabrics Used in Clean-rooms3.Terminology3.1 Definitions:3.1.1 cleanroom,na room in which the concentration ofairborne particles is controlled,and which is constructed andused in a manner to minimize the introduction,generation,andretention of particles inside the room.3.1.1.1 DiscussionIn addition to particles,other relevantparameters,such as temperature,humidity,and pressure,arecontrolled as required.The so-called Class of a cleanroom isdefined in documents including,but not limited to,FederalStandard 209E as the concentration per unit volume of particlesof a designated size.The various systems for such classificationlie beyond the scope of this document.3.1.2 dynamic wiping effciency,nin textile fabrics,theability of a fabric to remove water,or other liquids,from asurface,usually for spill removal.3.1.2.1 DiscussionThe ability of a fabric to hold liquid islargely a function of the composition and consturction of thefabric.A naturally sorptive fabric made of or with hydrophiliccomponents willABSORB liquid(typically water),while thosemade of hydrophobic materials willADSORB liquid(typicallywater)between the interstices of the fibers composing thefabric.In many cases,both absorption and adsorption takeplace.3.2 For definitions of terms used in this test method refer toTerminology D 123.4.Summary of Test Method4.1 A quarter-folded fabric swatch is clipped to the under-side of a 1-kg sled and pulled through a known challenge ofliquid,usually water,placed on a flat surface directly in frontof a wiper fabric and sled.The percent of liquid removed fromthe surface is determined gravimetrically as the dynamicwiping efficiency.5.Significance and Use5.1 This test method can be used for acceptance testing ofcommercial shipments but comparisons should be made withcaution because information on estimates of between-laboratory precision is limited as noted in the precision andbias section of this test method.5.1.1 If there are differences of practical significance be-tween reported test results for two laboratories(or more),comparative tests should be performed to determine if there isa statistical bias between them,using competent statisticalassistance.As a minimum,samples used for such comparativetests should be as homogeneous as possible,drawn from the1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.64 on Nonwovens.Current edition approved August 10,2001.Published November 2001.2Oathout,J.M.,“Determining the Dynamic Efficiency of Cleanroom Wipers forRemoval of Liquids and Particles from Surfaces,”Journal of the IEST,62(3),1726,May/June 1999.3“Evaluating Wiping Materials Used in Cleanrooms and Other ControlledEnvironments,”IEST-RP-CC004.2,Institute of Environmental Science and Tech-nology,940 East Northeast Highway,Mount Prospect,IL 60056(1992).4Annual Book of ASTM Standards,Vol 07.01.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.same lot of material as the samples that resulted in disparateresults during initial testing,and randomly assigned in equalnumbers to each laboratory.Other fabrics with established testvalues may also be