ASTM_D_3288_-_D_3288M_-_20.pdf

Designation:D3288/D3288M20Standard Test Methods forMagnet-Wire Enamels1This standard is issued under the fixed designation D3288/D3288M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 These test methods cover testing liquid enamel coatingsused to produce film-insulated magnet wire.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined1.3 The test methods appear as follows:SectionsDensity6 10Determined Solids16 22Effective Solids31 37Flash Point11 15Infrared Analysis45 50Stack Loss23 30Viscosity38 441.4 There is no known IEC equivalent document.1.5 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.1.6 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to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D29 Test Methods for Sampling and Testing Lac Resins(Withdrawn 2005)3D56 Test Method for Flash Point by Tag Closed Cup TesterD476 Classification for Dry Pigmentary Titanium DioxideProductsD1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD1475 Test Method for Density of Liquid Coatings,Inks,and Related ProductsD1711 Terminology Relating to Electrical InsulationD5423 Specification for Forced-Convection Laboratory Ov-ens for Evaluation of Electrical InsulationE131 Terminology Relating to Molecular SpectroscopyE168 Practices for General Techniques of Infrared Quanti-tative AnalysisE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE2975 Test Method for Calibration or Calibration Verifica-tion of Concentric Cylinder Rotational Viscometers3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in these test methods,refer to Terminology D1711.3.2 Definitions of Terms Specific to This Standard:3.2.1 For definitions of terms specific to this standard,seethe individual test methods.4.Significance and Use4.1 These tests are useful for specification and controlpurposes during the manufacture,purchase,and use of themagnet-wire enamels,and for determining uniformity ofbatches.5.Sampling5.1 Take a representative sample of liquid enamel and storefor future testing.Store the sample at room temperature in atightly sealed,nearly full container,unless otherwise specified.Use a container that is inert and impermeable to the wireenamel.These precautions avoid either the escape of solvent or1These test methods are under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.12 on Electrical Tests.Current edition approved Aug.1,2020.Published September 2020.Originallyapproved in 1973.Last previous edition approved in 2015 as D3288/D3288M 15.DOI:10.1520/D3288_D3288M-20.2For 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 last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright 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.reaction with the container and atmosphere.Glass and somemetals are suitable materials.Copper,iron,and aluminum areunsatisfactory.After removing test specimens,use care torestore these storage conditions.DENSITY6.Scope6.1 This test method covers the determination of the densityof magnet-wire enamel in terms of specific gravity or weightper gallon.7.Significance and Use7.1 Density is useful for specification and control purposesduring the manufacture and use