ASTM_D_1338_-_99_2021.pdf

Designation:D133899(Reapproved 2021)Standard Practice forWorking Life of Liquid or Paste Adhesives by Consistencyand Bond Strength1This standard is issued under the fixed designation D1338;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 practice covers two procedures applicable to alladhesives having a relatively short working life.It is intendedto determine whether the working life conforms to the mini-mum specified working life of an adhesive required byconsistency tests or by bond strength tests,or by both.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D897 Test Method for Tensile Properties of Adhesive BondsD906 Test Method for Strength Properties of Adhesives inPlywood Type Construction in Shear by Tension LoadingD907 Terminology of AdhesivesD1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Ten-sion Loading(Metal-to-Metal)D1084 Test Methods for Viscosity of Adhesives3.Terminology3.1 DefinitionsMany terms in this practice are defined inTerminology D907.3.2 Definitions of Terms Specific to This Standard:3.2.1 working life of an adhesive,nthe time elapsingbetween the moment an adhesive is ready for use and the timewhen the adhesive is no longer usable.4.Significance and Use4.1 To determine acceptable working life of an adhesive,two procedures are used.This practice is intended to apply to:4.1.1 Self-contained liquid or paste adhesives,4.1.2 Adhesives requiring addition of a catalyst,hardener,filler,thinner,and so forth,or combinations of two or more ofthese materials just prior to use,and4.1.3 Powdered or flaked adhesives which are dissolved inwater or other solvent and are used as liquid or paste adhesives.CONSISTENCY PROCEDURE5.Apparatus5.1 ViscometerAny means of measuring the viscosity orconsistency of the adhesive can be selected,provided that it issuitable for the type of adhesive under test and provided thatthe results can be expressed in fundamental units.5.2 Controlled-Atmosphere ChamberProvide an atmo-sphere of 23 6 1.1C(73.4 6 2F)and 50 6 2%relativehumidity.Alternative controlled conditions are permissible,provided the conditions are agreed upon by the purchaser andthe manufacturer.5.3 Beaker,of heat-resistant glass,376 mm(3 in.)indiameter,102 mm(4 in.)high,and having a capacity of 400mL.5.4 Stirring Rod,of glass,stainless steel,or other unreactivematerial.1This practice is under the jurisdiction of ASTM Committee D14 on Adhesivesand is the direct responsibility of Subcommittee D14.10 on Working Properties.Current edition approved April 1,2021.Published April 2021.Originallyapproved in 1954.Last previous edition approved in 2016 as D1338 99(2016).DOI:10.1520/D1338-99R21.2For 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.3Borosilicate glass is suitable for this purpose.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.16.Procedure6.1 Conduct the consistency test on both the adhesive whenfreshly prepared and on the adhesive after having beensubjected to the working life test.NOTE1An alternative test method to be used with this practice is TestMethods D1084.6.2 Precondition the adhesive and all the components at atemperature of 23 6 1.1C(73.4 6 2F),unless otherwiseagreed upon between the purchaser and the manufacturer.6.3 Start the test when the adhesive and all the componentsare at a temperature of 23 6 1.1C(73.4 6 2F),unlessotherwise agreed