ASTM_D_952_-_15.pdf

Designation:D95215Standard Test Method forBond or Cohesive Strength of Sheet Plastics and ElectricalInsulating Materials1This standard is issued under the fixed designation D952;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.1.Scope*1.1 This test method covers the determination of the bondstrength or ply adhesion strength of sheet plastic and electricalinsulating materials.It is applicable to both laminated andnonlaminated thermoplastic and thermosetting materials.1.2 Test data obtained by this test method is relevant andappropriate for use in engineering design.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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.NOTE1There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD4000 Classification System for Specifying Plastic Materi-alsD5947 Test Methods for Physical Dimensions of SolidPlastics SpecimensD6988 Guide for Determination of Thickness of Plastic FilmTest SpecimensE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ANSI Standard:B1.1 Standard for Unified Screw Threads33.Terminology3.1 DefinitionsFor definitions of technical terms pertain-ing to plastics used in this test method,see Terminology D883.4.Significance and Use4.1 This test,when applied to laminated plastics,is ameasure of the interlaminar or intralaminar strength,whicheveris smaller,in a direction normal to the plane of the laminate.When applied to nonlaminated plastics,the test is a measure ofthe cohesive strength of the material.The property determinedis fundamental and has not yet been correlated with the resultsof any other method for bond strength.4.2 The test is potentially useful as(1)a research test whenstudying the effects of changes in independent variables,(2)aspecification test,or(3)a referee test.4.3 Before proceeding with this test method,make referenceto the specification of the material being tested.Any testspecimen preparation,conditioning,dimensions or testingparameters or combination thereof covered in the relevantASTM materials specification shall take precedence over thosein this test method.If there are no relevant ASTM materialspecifications then the default conditions apply.Table 1 ofClassification System D4000 lists the ASTM materials stan-dards that currently exist.5.Apparatus and Materials5.1 Testing MachineAny suitable tensile testing machinecapable of crosshead movement at a constant rate of 1.3mm/min.(0.05 in/min.)and of sufficient capacity to exceed thefailure load of the material being tested.5.2 Loading FixturesThe loading fixtures shall be self-aligning and shall not apply eccentric loads.5.3 Metal BlocksA pair of 51-mm(2-in.)square metalblocks each having a maximum height of 51 mm(2 in.).Eachblock shall be configured to permit attachment to the testingmachines loading fixture(see Fig.1).NOTE2Blocks constructed from heat-treated aluminum alloy,eachhaving a hole in one end tapped78in.in accordance with ANSI B1.1,toaccommodate threaded78-in.studs of convenient length,have been usedsuccessfully.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.10 on Mechanical Properties.Current edition approved Dec.1,2015.Published January 2016.Originallyapproved in 1948.Last previous edition approved in 2010 as D952 10.DOI:10.1520/D0952-15.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.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 States1 5.4 AdhesiveIt is acceptable to use any adhesive that isfound to perform satisfactorily under this test provided that itwill not influence the specimen behavior by physical orchemical effects.NOTE3Redux4has been found satisfactory for use with certainthermoset materials.Cyanoacrylate cement and room-temperature-curingepoxy have been used successfully for both thermoplastic and thermosetmaterials.6.Test Specimen6.1 The test specimen s