EUROPEANSTANDARDNORMEEUROPÉENNEEUROPÄISCHENORMEN438-2January2005ICS83.140.20SupersedesEN438-2:1991EnglishversionHigh-pressuredecorativelaminates(HPL)-Sheetsbasedonthermosettingresins(usuallycalledLaminates)-Part2:DeterminationofpropertiesStratifiésdécoratifshautepression(HPL)-Plaquesàbasederésinesthermodurcissables(communémentappeléesstratifiés)-Partie2:DéterminationdescaractéristiquesDekorativeHochdruck-Schichtpressstoffplatten(HPL)-PlattenaufBasishärtbarerHarze(Schichtpressstoffe)-Teil2:BestimmungderEigenschaftenThisEuropeanStandardwasapprovedbyCENon10December2004.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITÉEUROPÉENDENORMALISATIONEUROPÄISCHESKOMITEEFÜRNORMUNGManagementCentre:ruedeStassart,36B-1050Brussels©2005CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.Ref.No.EN438-2:2005:ELicensedCopy:sheffieldunsheffieldun,na,WedOct2507:39:41GMT+00:002006,UncontrolledCopy,(c)BSIEN438-2:2005(E)2ContentsPageForeword......................................................................................................................................................................31Scope..............................................................................................................................................................42Normativereferences....................................................................................................................................43Termsanddefinitions...................................................................................................................................54Assessmentofappearance..........................................................................................................................55Determinationofthickness...........................................................................................................................66Determinationoflengthandwidth..............................................................................................................67Determinationofedgestraightness............................................................................................................78Determinationofedgesquareness..............................................................................................................89Determinationofflatness............................................................................................................................1010Resistancetosurfacewear........................................................................................................................1111Resistancetoabrasion(flooringgradelaminates)..................................................................................1312Resistancetoimmersioninboilingwater.................................................................................................1613Substrateprotectionagainstwatervapour..............................................................................................1814Resistancetowatervapour........................................................................................................................1915Resistancetowetconditions(Exteriorgradelaminates).......................................................................2116Resistancetodryheat................................................................................................................................2317Dimensionalstabilityatelevatedtemperature.........................................................................................2518Dimensionalstabilityatambienttemperature..........................................................................................2619Resistancetoclimaticshock(exteriorgradelaminates)........................................................................2720Resistancetoimpactbysmall-diameterball............................................................................................2921Resistancetoimpactbylargediameterball.............................................................................................3322Resistancetoimpactbylargediameterball(flooringgradelaminates).................