ASTM_D_6650_-_01.pdf

Designation:D 6650 01Standard Test Method forDetermining the Dynamic Wiping Efficiency,Wet ParticleRemoval Ability,and Fabric Particle Contribution ofNonwoven Fabrics Used in Cleanrooms1This standard is issued under the fixed designation D 6650;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 determination of the dy-namic wiping efficiency,wet particle removal ability and fabricparticle contribution of nonwoven fabrics.1.2 This test method applies to all nonwoven fabrics used incleanrooms.For more information see Journal of the IEST2,3.NOTE1For dynamic wiping efficiency in non-cleanrooms,refer toTest Method D 6702 Standard Test Method for Determining the DynamicWiping Efficiency of Nonwoven Fabrics Not 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 Documents2.1 ASTM Standards:D 123 Terminology Relating to Textiles4D 6702 Test Method for Determining the Dynamic WipingEfficiency of Nonwoven Fabrics Not Used in Cleanrooms52.2Federal Standard:209E,“Airborne Particulate Cleanliness Classes in Clean-rooms and Clean Zones,”(September 11,1992)63.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 construction of thefabric.A naturally sorptive fabric made of or with hydrophiliccomponents will ABSORB liquid(usually 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.3.1.3 fabric particle contribution,ntextile fabrics,thenumber of particles contributed by a fabric used for spillremoval without the intentional addition of any foreign par-ticles.3.1.4 wet particle removal ability,nin textile fabrics,theability of a fabric to I remove liquid contaminated with smallparticles of known size and quantity from a surface,usually forspill removal.3.2 For definitions of terms used in this test method refer toTerminology D 123.4.Summary of Test Method4.1 Dynamic Wiping EffciencyA quarter-folded fabricswatch is clipped to the underside of a 1-kg sled and pulledthrough a known challenge of liquid,usually water,placed ona flat surface directly in front of a wiper fabric and sled.Thepercent of liquid removed from the surface is determinedgravimetrically as the dynamic wiping efficiency.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.64 on Nonwovens.Current edition approved April 10,2001.Published July 2001.2Oathout,J.M.,“Determining the Dynamic Efficiency of Cleanroom Wipers forRemoval of Liquids and Particles from Surfaces,”Journal of the IEST,62(3),17-26,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 07.01.5Annual Book of ASTM Standards,Vol 07.02.6Available from Institute of Environmental Sciences and Technology,940 EastNorthwest Highway,Mount Prospect,IL 60056.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.4.2 Wet Particle Removal AbilityThe dynamic wipingefficiency test is performed as summarized in 4.1 except theliquid challenge is salted with a