ASTM_D_899_-_00_2018.pdf

Designation:D89900(Reapproved 2018)Standard Practice forApplied Weight Per Unit Area of Liquid Adhesive1This standard is issued under the fixed designation D899;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 provides a procedure for the estimation ofthe quantity of liquid adhesive applied in a spreading or coatingoperation.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:2D907 Terminology of Adhesives3.Terminology3.1 DefinitionsSeveral terms in this practice are defined inaccordance with Terminology D907.3.2 Definitions of Terms Specific to This Standard:3.2.1 spreading or coating weight per unit area,nthe totalquantity of liquid adhesive uniformly applied,expressed inpounds per thousand square feet of joint or surface area.(Seespread in Terminology D907.)3.2.2 test specimen,nthe material that is to be coated withadhesive.(See adherend in Terminology D907).3.2.3 total quantity of liquid adhesive appliedthe weightof the adhesive on the test specimen as applied on the surfaceor at the glue joint,whether resulting from a single spread,adouble spread,or multiple applications.4.Significance and Use4.1 For the bonding of adherends,the amount of adhesivepresent is critical and it is important to understand that thispractice does not ensure sufficient adhesive is present on theadherend surface.4.2 This practice can be used to supplement industry usessuch as that of visually checking the spread or the use ofmil-thickness gages.4.3 In laboratory and industrial operations,hand or me-chanical application of adhesives can be duplicated for costsavings using this practice.5.Apparatus5.1 The following apparatus is required for this practice:5.1.1 A balance,capable of weighing the material accu-rately to the nearest 1%,and5.1.2 A suitable instrument for measuring the linear dimen-sions of the specimens to the nearest 1%.6.Test Specimens6.1 Select test specimens from portions of the actual mate-rial to be coated or spread,or from the same lot or a similarone,having the same physical characteristics such as thickness,density,or texture.6.2 The size of the specimen may vary with the nature of thesubstrate.NOTE1Materials of low porosity normally require larger test speci-mens than materials of high porosity.6.3 Use simple geometric shapes for the test specimens tofacilitate precise measurement of dimensions.6.4 For operations involving the coating or spreading ofsheeted stock,individual plies or lamina of the adherend,aminimum of 5 test specimens is required for determining theaverage weight of liquid adhesive applied.6.5 For operations where the test specimen is in continuousform,such as roll stock of paper or fabric,use a test specimen1This practice is under the jurisdiction of ASTM Committee D14 on Adhesivesand is the direct responsibility of Subcommittee D14.10 on Working PropertiesCurrent edition approved Nov.1,2018.Published November 2018.Originallyapproved in 1947.Last previous edition approved in 2013 as D899 00(2013).DOI:10.1520/D0899-00R15.2For 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 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.1 sufficient in size to reflect accurately the average spreading orcoating weight of liquid adhesive.7.Conditioning7.1 Prior to the application of the adhesive,bring the testspecimens to equilibrium with the atmospheric conditionsprevailing under actual or contemplated op