ASTM_D_1995_-_92_2011.pdf

Designation:D199592(Reapproved 2011)Standard Test Methods forMulti-Modal Strength Testing of Autohesives(ContactAdhesives)1This standard is issued under the fixed designation D1995;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.Scope1.1 These test methods cover procedures by which autohe-sives can be tested in four commonly practiced stressingmodes,namely:compression shear,cleavage,climbing drumpeel,and T-peel,and in various combinations of rigid-to-rigid,flexible-to-rigid,and flexible-to-flexible adherends that includewood,aluminum,steel flakeboard,and plastic laminates.Quantitative test methods that involve bond formation byimpact are also provided.Three pressure modes are provided:static,roller,and impact.Because there are many types ofcontact adhesives being used to bond many different materialsunder widely differing conditions,these test methods aredesigned to allow the user to select the test mode,coatingthickness,temperature and relative humidity conditions,pres-sure magnitude and mode,open time,and bond-conditioningtime.1.1.1 The bond-formation process used with autohesives isunlike that of all other adhesives and in consequence,testing ofautohesives requires methods that are unlike those provided byother ASTM standards.See Annex A1.1.2 A choice of adherends is available in each test mode.The combination of adherends that can be bonded together islimited to those shown in Appendix X1.1.3 Methods for application of pressure are available in eachtest mode.For a particular combination of substrates,themeans available for application of pressure are limited to thoseshown in Appendix X2.1.4 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.1.5 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 and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in 7.5.2.Referenced Documents2.1 ASTM Standards:2D905 Test Method for Strength Properties of AdhesiveBonds in Shear by Compression LoadingD907 Terminology of AdhesivesD1062 Test Method for Cleavage Strength of Metal-to-Metal Adhesive BondsD1151 Practice for Effect of Moisture and Temperature onAdhesive BondsD1781 Test Method for Climbing Drum Peel for AdhesivesD1876 Test Method for Peel Resistance of Adhesives(T-Peel Test)D2651 Guide for Preparation of Metal Surfaces forAdhesiveBondingE4 Practices for Force Verification of Testing Machines3.Terminology3.1 Definitions:3.1.1 Many terms in these test methods are defined inTerminology D907.3.1.2 autohesion,nadhesion developed by interdiffusionof the molecules of two solid surfaces of the same material andconsequent obliteration of the interface between them.3.1.3 autohesive,nan adhesive possessing the property ofautohesion.(Also called contact-bond adhesive and dry-bondadhesive.)3.1.4 shear strength,nin adhesive joint,the maximumaverage stress when a force is applied parallel to the joint.3.1.4.1 DiscussionIn most adhesive test methods,theshear strength is actually the maximum average stress at failureof the specimen,not necessarily the true maximum stress in thematerial.3.2 Definitions of Terms Specific to This Standard:1These test methods are under the jurisdiction of ASTM Committee D14 onAdhesives and are the direct responsibility of Subcommittee D14.70 on Construc-tion Adhesives.Current edition approved Jan.1,2011.Published January 2011.Originallyapproved in 1991.Last previous edition approved in 2004 as D1995 92(2004).DOI:10.1520/D1995-92R11.2For 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 States1 3.2.1 autohesive(contact)failure,na condition in whichno contact appears to have occurred between the two layers ofautohesive,as evidence by visual inspection of the specimenafter destructive testing.3.2.2 bond-conditioning time,nthe time elapsed betweenmaking the bonded assembly and testing it or specimens madefrom it.4.Summary of Test Methods4.1 The autohesive is conditioned to the temperature se-lected for the coating application,the substrates are surfacedflat,precut or cleaned,or both,as required,and then condi-tioned to the temperature and humidity preselected for thecoating application.Under controlled temperature a