ASTM_D_5824_-_98_2011.pdf

Designation:D582498(Reapproved 2011)Standard Test Method forDetermining Resistance to Delamination of Adhesive Bondsin Overlay-Wood Core Laminates Exposed to Heat andWater1This standard is issued under the fixed designation D5824;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 This test method provides a procedure to determine thequality of bond between an overlay and a wood core in anadhesively bonded laminate.The quality of bond is determinedby measuring the resistance to delamination of the adhesivelybonded laminate when tested under specific conditions ofpreparation,conditioning,and testing.Such products include,but are not limited to,window and door components,such asstiles and rails,and other overlaid panels.Typical wood-basedcores are finger-jointed lumber,particleboard,oriented strandboard,and hardboard.Typical overlays would be veneer,high-pressure laminate,high-density polyethylene,andfiberglass-reinforced plastic.1.2 Adhesive bond performance as measured by resistanceto delamination in this test method is suitable for use inadhesive product development,manufacturing quality control,and monitoring bonding processes.1.3 This test method does not provide guidance for deter-mining bond line performance for plywood products.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.2.Referenced Documents2.1 ASTM Standards:2D907 Terminology of AdhesivesD4442 Test Methods for Direct Moisture Content Measure-ment of Wood and Wood-Based MaterialsD5266 Practice for Estimating the Percentage of WoodFailure in Adhesive Bonded JointsE6 Terminology Relating to Methods of Mechanical TestingE41 Terminology Relating To ConditioningE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 Certain terms in this test method are defined inTerminologies D907,E6,and E41.3.1.2 delamination,nthe separation of layers in a laminatebecause of failure of the adhesive,either in the adhesive itselfor at the interface between the adhesive and the adherend.(SeeTerminology D907.)3.1.3 overlay,na uniform layer of material,usually in theform of a sheet,adhesively bonded to an adherend with thepurpose of improving the appearance or physical properties ofthe laminate.3.2 Definitions of Terms Specific to This Standard:3.2.1 edge,nin an adhesively bonded laminate,the di-mension along its length and parallel to the grain where theoverlay is bonded to the core.1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.30 on WoodAdhesives.Current edition approved April 1,2011.Published April 2011.Originallyapproved in 1995.Last previous edition approved in 2003 as D5824 98(2003).DOI:10.1520/D5824-98R11.2For 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 3.2.2 end,nin an adhesively bonded laminate,the dimen-sion which is perpendicular to the length of the laminate wherethe overlay is bonded to the core.4.Significance and Use4.1 This test method measures quantitatively the effects ofwater soaking and drying,and their associated swelling andshrinking stresses on adhesive bonds in overlay-laminatedassemblies.4.2 Adhesive bond performance is based on the ability ofthe adhesive and adhesive bonds to resist delamination duringaccelerated exposure to water and heat.4.3 Resistance to delamination when subjected to environ-mental factors is critical to the performance of the laminatedassembly in service.4.4 This test method is to be used to determine the quality ofadhesive bonds in overlay-wood core laminates after theadhesive has been certified by a specification appropriate forthe product,class,and end use.5.Apparatus5.1 Oven(s)Forced-air oven capable of maintaining 170 65F(77 6 3C),with sufficient air circulation to ensure that theprescribed drying temperature is uniformly maintained whenthe oven is fully loaded and the air flow is parallel to the facesof the specim