ASTM_D_2098_-_13.pdf

Designation:D209813Standard Test Method forDynamic Water Resistance of Shoe Upper Leather by theDow Corning Leather Tester1This standard is issued under the fixed designation D2098;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers the determination of the dy-namic water resistance of shoe upper leather by means of theDow Corning Tester.It has been revised to show the state of theart in the equipment used in testing.It is applicable to all typesof shoe upper leather.This test method does not apply to wetblue.1.2 Initial water penetration and water absorption can bemeasured.1.3 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.1.4 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:2D1610 Practice for Conditioning Leather and Leather Prod-ucts for TestingD2099 Test Method for Dynamic Water Resistance of ShoeUpper Leather by the Maeser Water Penetration Tester3.Significance and Use3.1 This test method is intended to estimate the waterresistance of shoe upper leather.The flex imparted to theleather is a magnification of the flex given the vamp of the shoein actual wear.NOTE1There is an indication that this test method cannot be usedinterchangeably for specification purposes with Test Method D2099.4.Apparatus4.1 Balance,sensitive to 0.01 g.4.2 Dow Corning Leather Tester,3as shown in Fig.1,or itsequivalent.The essential features of the machine are asfollows:4.2.1 A specimen holder made of two vertical clamps.Eachclamp shall have two stainless steel arms(7.5 by 0.5 by 0.5 in.(190.5 by 12.7 by 12.7 mm),one arm fixed,the othermoveable.One clamp shall be mounted on a horizontalreciprocating shaft,that is,attached by a connecting link to amotor driven eccentric,which turns at 60 r/min.The bottom ofthe clamps shall be in the same horizontal plane.In onerotation of the eccentric,the minimum distance betweenclamps shall be 1.50 6 0.01 in.(38.16 0.25 mm)(insidemeasurement)and the maximum distance between clamps 2.506 0.01 in.(63.5 6 0.25 mm)(inside measurement).4.2.2 Water Tank made of stainless steel or other noncorro-sive material.It shall be of such a size that it can be placedaround the clamps,and of such a depth that when in positionfor use,the top of the pan is at least 2.5 in.(63.5 mm)abovethe bottom of the clamps,and the bottom of the pan is at least0.5 in.(12.7 mm)below the bottom of the clamps.4.2.3 Two systems shall be used to record the number ofcycles through which the specimen is flexed.One shall be amechanical reset counter connected to the movable clamp.Theother system shall be electrical(see Fig.2).The resistanceacross the electrodes shall be 7500 6 500 ohms.The sensingelectrode shown is inside a leather specimen filled withstainless-steel balls.The common electrode is in a salt solutionwhich is in continuous contact with the specimen duringflexing.Switch S when manually closed starts an electricalimpulse counter actuated by a micro switch,EC,which makes1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.03 on Footwear.This testmethod was developed in cooperation with the American Leather Chemists Assn.Current edition approved Nov.1,2013.Published November 2013.Originallyapproved in 1962 as D209862T.Last previous edition approved in 2012 asD209804(2012).DOI:10.1520/D2098-13.2For 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.3The sole source of supply of the apparatus known to the committee at this timeis Koehler Instrument Co.,1595 Sycamore Ave.,Bohemia,NY 11716.Telephone:(800)878-9070.Fax:(516)589-3815.If you are aware of alternative suppliers,please provide this information toASTM Headquarters.Your comments will receivecareful consideration at a meeting of the responsible technical committee,whichyou may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 contact once on each flex.This records the total number offlexes until initial water penetration.Initial water penetration isdetected by a current leakage fr