ASTM_E_1307_-_10.pdf

Designation:E130710Standard Practice forSurface Preparation and Structural Adhesive Bonding ofPrecured,Nonmetallic Composite Facings to StructuralCore for Flat Shelter Panels1This standard is issued under the fixed designation E1307;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 Department of Defense.1.Scope1.1 This practice covers the materials,processes,and qual-ity controls to be used in the manufacture of durable adhesivebonded,nonmetallic faced,flat sandwich panels for rigid wallrelocatable shelters.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C297/C297M Test Method for Flatwise Tensile Strength ofSandwich ConstructionsE865 Specification for Structural Film Adhesives for Hon-eycomb Sandwich PanelsE990 Specification for Core-Splice Adhesive for Honey-comb Sandwich Structural PanelsE1091 Specification for Nonmetallic Honeycomb Core forUse in Shelter Panels2.2 Federal Standard:3FED STD 209 Clean Room and Work Station Requirements2.3 Society of Automotive Engineers(SAE)Standard:4SAE-AMS-S-8802 SealingCompound,Temperature-Resistant,Integral Fuel Tanks and Fuel Cell Cavities,High-Adhesion2.4 Military Handbook:3MIL-Handbook 337 Adhesive Bonded Aerospace Structures3.Significance and Use3.1 Durable adhesive bonds of composite laminates can beobtained reliably only through proper selection and carefulcontrol of the materials used and the steps in the bondingprocess.The preparation of the composite laminates to obtainsurfaces with appropriate characteristics is a critical step.Improper surface preparation can produce seemingly accept-able bonds that can degrade rapidly with time.This practicedescribes how properly prepared surfaces can be obtained.3.2 The formation of reproducible,durable,adhesive bondsin structural units requires great care in the selection ofmaterials,the preparation of the surfaces of the parts to bebonded,the fit of parts,and the performance of the steps in thebonding process.Experience has shown that adhesive bondingcarried out in accordance with this practice produces reproduc-ible bonds.4.Materials4.1 MaterialsMaterials shall be as specified herein or asspecified in the contract.All materials shall be stored andhandled in such a manner as to provide protection againstdegrading environments and mechanical damage.4.2 Composite Reinforcement and ResinThe compositereinforcement and resin shall meet the requirements specifiedin the procurement document.4.3 Peel Ply FabricAnonreuseable peel ply shall be used.Closely woven fabric of nylon,polyester,or glass has been1This practice is under the jurisdiction of ASTM Committee E06 on Perfor-mance of Buildings and is the direct responsibility of Subcommittee E06.53 onMaterials and Processes for Durable Rigidwall Relocatable Structures.Current edition approved Nov.1,2010.Published December 2010.Originallyapproved in 1989.Last previous edition approved in 2005 as E1307 05.DOI:10.1520/E1307-10.2For 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 Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/dodssp.daps.dla.mil.4Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096-0001,http:/www.sae.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 found suitable.The peel ply fabric must be compatible with themanufacturing process.4.4 Precured FacingsThe facings shall be certified ascomplying with the reinforcement,resin binder,resin content,and thickness requirements of the procurement document.Facings shall be free of defects that may adversely affect thestructural integrity of the bonded panel.4.5 CoreThe core material shall be as specified in Speci-fication E1091 or the procurement document and shall meet therequirements of the applicable document.4.6 Structural Film AdhesiveThe adhesive shall conformto the requirements of Specification E865.It shall be stored inaccordance with the manufacturers recommendations.4.7 Core Splice AdhesiveThe cor