1、A Referencenumbe r ISO98842:1999 (E) INTERNATIONAL STANDARD ISO 98842 Firstedition 19990401 TeasacksSpecification Part2: Performancespecificationforsacksfor palletizedandcontainerizedtransportoftea SacsthSpcifications Partie2:Spcificationsdeperformancedessacsutilisspourletransport palettisetconteneu
2、risduthISO98842:1999(E) ISO1999 Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyan ymeans,electronic ormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromthepublisher. InternationalOrganizationforStandardization Casepost
3、ale56 CH1211Genve20 Switzerland Internet isoiso.ch PrintedinSwitzerland ii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemb
4、erbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersof
5、electrotechnicalstandardization. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO98842waspreparedbyTechnicalCommitteeISO/TC34, Agr
6、iculturalfoodproducts, SubcommitteeSC8, Tea. ISO9884consistsofthefollowingparts,underthegeneraltitle TeasacksSpecification : Part1:Referencesackforpalletizedandcontainerizedtransportoftea Part2:Performancespecificationforsacksforpalletizedandcontainerizedtransportoftea AnnexesAandBformanintegralpart
7、ofthispartofISO9884.AnnexCisforinformationonly.ISO ISO98842:1999(E) iii Introduction ISO98841specifiesthematerials,constructionanddimensionsofareferencesackwhichhasbeendemonstrated byrigoroustransportandstoragetrialstobesuitableforthepalletizedandcontainerizedtransportoftea. Continuingdevelopmentofi
8、mprovedmaterialsisresultingintheavailabilityofsa cksofdifferentmaterialsand constructiontoservethispurpose.ThispartofISO9884setsminimumrequirementsandperformanceteststo ensurethatsuchsacksareequivalentorsuperiorinperformancetothereferencesack.Guidanceonthef illingof teasacksisgiveninannexC,forinform
9、ationonly.INTERNATIONALSTANDARD ISO ISO98842:1999(E) 1 TeasacksSpecification Part2: Performancespecificationforsacksforpalletizedandcontainerized transportoftea 1Scope ThispartofISO9884specifiesrequirementsandteststodeterminethesuitabilityofsa cksforthepalletizedand containerizedtransportofteaonstan
10、dardpalletsofstandardunitloadsizeinstandardcontainers(see ISO98841). 2Normative references Thefollowingstandardscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthis InternationalStandard.Atthetimeofpublication,theeditionsindicatedwerevalid.Allstandardsaresubjectto revision,an
11、dpartiestoagreementsbasedonthisInternationalStandardareencouragedtoinvestigatethe possibilityofapplyingthemostrecenteditionsofthestandardslistedbelow.MembersofIECandISOmaintain registersofcurrentlyvalidInternationalStandards. ISO1573:1980, TeaDeterminationoflossinmassat103C . ISO2758: 1) , PaperDete
12、rminationofburstingstrength . ISO4120:1983, SensoryanalysisMethodologyTriangulartest . ISO4121:1987, SensoryanalysisMethodologyEvaluationoffoodproductsbymethodsusingscales. ISO65901:1983, PackagingSacksVocabularyandtypesPart1:Papersacks . ISO79651:1984, PackagingSacksDroptestPart1:Papersacks . ISO98
13、841:1994, TeasacksSpecificationPart1:Referencesackforpalletizedandcontainerizedtransportof tea. 1) Tobepublished.(RevisionofISO2758:1983)ISO98842:1999(E) ISO 2 3Definitions ForthepurposesofthispartofISO9884,thedefinitionsgiveninISO65901apply. 4Requirements 4.1Sack type Sacksshallbeconstructedwithfla
14、thexagonalendsandshallconsistofatleasttwoplies. 4.2Dimensions Thefilledsackdimensionsshallbeasgivenintable1ofISO98841:1994. 4.3Construction materials 4.3.1General Allmaterialsusedintheconstructionofthesack(paper,plastics,adhesive,barrierply)shallbefreefromtaint and/orodour.Nomaterialscontainingchlor
15、ophenolsortheirderivativesshallbeused. 4.3.2Outer ply Theouterplymaterialshallhaveaminimumwetburstindexof1,2kN/g,whentestedinaccordancewithISO2758. 4.3.3Innermost ply Theinnerplyshallbeanaluminiumfoilcoatedbarrierplywiththealuminiumfacinginwards,complyingwith ISO98841,orofamaterialhavingapermeabilit
16、ytochlorophenolorchloroanisolenotgreaterthanthatoftheinner plyofasackcomplyingwithISO98841,whentestedbythemethodgiveninannexB. 4.4Performance requirements 4.4.1Drop test Whenaminimumofthreesacksf illedwith60kgofteaaredroppedthreetimes(onceeachonaface,buttandside) fromaconstantheightof3m,inaccordance
17、withthemethodgiveninISO79651,thereshallbenoruptureof sacksresultinginlossofcontents. 4.4.2Transport trials Sacksshallmatchorsurpasstheperformanceofreferencesacks(seeISO98841)throughoutaminimumof 6monthsofintercontinentaltransporttrialscarriedoutinaccordancewithannexA. 5Test report Thetestreportmaybe
18、usedbyasackmanufacturertocertifythatasackconformstotherequirementsofthis specification.Itshallspecifythefollowingdetails. a)Sack specification: 1)materials; 2) construction(numberandtypeofplies); 3)dimensions.ISO ISO98842:1999(E) 3 b) Droptestresults: 1) numberofsackstestedanddate(s)ofthetest; 2) ma
19、ssandtypeoftea; 3) nameoforganizationperformingthetest. c)Transport trials: 1) placeanddateofproduction,gradesandinvoice/bulknumbersofthetea; 2) moisturecontentoftheteaatpointofpacking; 3) numberandmassofthereferencesacksandthetrialsackspackedforeachbulk/invoice; 4) placeanddateofpacking/palletizati
20、on; 5) dateandmeans/routeoftransporttoportofloading; 6) portanddateofdeparture; 7) vesselanddetailsof stowageofthetestandreferencepallets, othercargocarried; 8) routeofthevoyageandthedateofarrivalintheterminalport; 9) meansoftransportto,andplaceanddateofopeningthecontainers; 10) conditiononreceipt(s
21、eeA.2.4); 11) numbersofsamplesacksandmassofsamplestaken; 12) moisturecontentsofthesamplesandthenameoftheorganizationcarryingouttheanalysis; 13)namesandaffiliationsoftheteatasterscarryingouttheorganolepticassessments,thedatesofthe assessmentsandtheresults.ISO98842:1999(E) ISO 4 AnnexA (normative) Tra
22、nsporttrials A.1Generalprocedure Trialsacksshallbecomparedwithreferencesacks(seeISO98841)f illedwiththesamebulkorinvoiceofteaat thesametimeunderidenticalconditions,transportedtogetherandopenedatthesametimeunderidentical conditions. Atleast1000filledtestsa cksshallbeshippedinaminimumoffourvesselsover
23、aminimumperiodof6monthsin aminimumoftwocontainerspervessel.Eachtestcontainershallholdatleast100trialsacksand100reference sacks. Thetestandreferencesacksshallbecomparedonthebasisof: incidenceandextentofsackdamage; incidenceandextentofproductspillage/loss; moisturecontentofteaonarrival; organolepticqu
24、alityofteaonarrival. A.2Specificprocedures A.2.1 Teafromthesamebulkorinvoiceshallbeusedtofillequalnumbersoftrialandreferencesacks. NOTE Severalbulksmaybeusedtomakeuppairedpalletloadsoftrialandreferencesackstofillthetestcontainers. A.2.2 Aminimumofthreesamplesofeachbulkofteashallbetakenduringthesackf
25、illingoperation.Themoisture contentofeachsampleshallbedeterminedinaccordancewiththemethodgiveninISO1573. A.2.3 Pairedpalletsoftrialsacksandreferencesacksshallbeplacedadjacentlyinthetestcontainer,alternating inpositiontoachieveanevendistributionfromsidetosideandtoptobottom. EXAMPLE TRTTR RTRRT whereT
26、isatrialsackandRisareferencesack. A.2.4 Onarrrivalatthedestination,theconditionofthecontentsofeachtestcontainershallbeexaminedasthey areremovedandstoredinthewarehouse.Aninspectionrecordshallbecompleted(withphotographsillustrating damage)settingout: datesofarrivalandunpacking; thecondition,appearance
27、andstabilityofeachpalletload(testandreferencesacks);ISO ISO98842:1999(E) 5 thedamageincurredbybothtestandreferencesacks; theextentofanyproductspillage/loss. A.2.5 Samplesshallbetakenonarrivalfromundamagedtrialsacksandreferencesacksatthetop,middleand bottomofeachpallet,andthesesamplesshallbebulked.Th
28、emoisturecontentsofthebulkedsamplesshallbe determinedinaccordancewiththemethodgiveninISO1573.Themoisturecontentsofsamplesfromtrialpallets shallnotexceedthoseofsamplesfromthepairedreferencepallets. A.2.6 Atleasttwoconsignmentsoftea,havingsuccessfullycompletedatransporttrialfromproducingfactoryto purc
29、haserswarehouse,shallbesubjectedtoacomparativetasteassessment.Thisshallbecarriedoutbya minimumoffourprofessionalteatasters(atleasttwoofwhomshallbeindependentoftheproducerandthe purchaser)onbulkedsamplesfromreferenceandtestpalletscontainingthesameoriginalbulktea. Thefirststepinthisassessmentshallbead
30、ifferencetestcarriedoutaccordingtothemethodgiveninISO4120.If nosignificantdifference( Plessthan0,05)isfound,thetrialsackshallbedeemedtohavepassedthetest.Ifa significantdifferenceisfound,apreferencetestshallbecarriedoutinaccordancewiththemethodgivenin ISO4121todeterminewhichsample(s)is(are)ofthehighe
31、rquality.Thetrialsackshallbedeemedtohavepassed thetestifthecontentsofthereferencesacksarenotsignificantlypreferredoverthecontentsofthetrialsacks (Plessthan0,05).ISO98842:1999(E) ISO 6 AnnexB (normative) Measurementofpermeabilityofteasackbarrierplymaterial Determinationofchlorophenolsandchloroanisole
32、sbygaschromatography B.1General Multiwallpapersacksusedforthebulktransportofteaincludeaninneraluminiumcoatedbarrierplytoprotectthe contentsfromcontaminationarisingfromthepermeationoforganicvapourssuchaschlorophenolsand chloroanisoles. Themethoddescribedinthisannexisapplicabletoteasackbarrierplymater
33、ials(e.g.multilayerlaminates)to establishratesofchlorophenolandchloroanisolepermeationthroughamaterialundertest.Thisproceduremay alsobeconsideredapplicabletodetermineratesofpermeationofotherorganicvapoursthroughsimilarbarrier materials. B.2Principle Agastightcellisdividedintotwochambersbythetestplym
34、aterial.Ononeside(i.e.theoutersurfaceofthetest material)isgeneratedasaturatedvapourofchlorophenol/chloroanisole.Theotherside(i.e.innersurfaceofthetest material)ispurgedwithaninertgas(e.g.oxygenfreenitrogen)ataknownconstantrate.Organicvapours permeatingacrossthebarrierarecollectedatthepurgedoutletoft
35、hecellontoanabsorbenttrap.Aftertheelapsed samplingperiodthetrapisremovedfromthecellforchromatographicanalysisofthecollectedsample. B.3Reagentsandmaterials Useonlyreagentsofrecognizedanalyticalgrade. B.3.1 Standardstocksolutions B.3.1.1 2,6Dichlorophenol Dissolve100mgofof2,6dichlorophenolinmethanolan
36、ddilutetovolumewithmethanolina100mlvolumetric flask. B.3.1.2 2,4,6Trichlorophenol Dissolve100mgofof2,4,6trichlorophenolinmethanolanddilutetovolumewithmethanolina100mlvolumetric flask. B.3.1.3 Pentachloroanisole Dissolve100mgofpentachloroanisoleinmethanolanddilutetovolumewithmethanolina100mlvolumetri
37、cflask.ISO ISO98842:1999(E) 7 B.3.2 Standardworkingsolutions Prepareconcentrationsof100ng/m l,10ng/m l,and1ng/m l,byserialdilutionfromthestandardstocksolutions (B.3.1). B.3.3 TenaxTAbeads 2) ,meshsize20 m mto35 m m. Tenaxisaporouspolymerbasedon2,6diphenyl pphenyleneoxide. B.4Apparatus Usuallaborator
38、yequipmentand,inparticular,thefollowing. B.4.1 Barriermaterialpermeabilitytestcell ,seefigureB.1. Thecellisconstructedfromtwoborosilicaglassdomeswithflatflangeandsockets(groundglass,sizeDA4/100, socketsize29/32),withanexternaldiameterof150mm.Adiscofthetestmaterialiscuttosize,andplaced betweenthetwof
39、langes,whicharesecuredtoformagastightseal.Thevolumeinwhichthesaturatedorganic vapourwillbegeneratedissealedwitha29/32groundglassstopper.ADrechseladaptorconsistingofaninlettube forthepurginggasandanoutlettowhichtheabsorptiontubewillbeattachedisplacedintheothersocketofthe testcell. B.4.2 Absorbenttrap
40、 consistingofatubepackedwiththeappropriatequantityofTenaxTAbeads(B.3.3). EXAMPLE Aborosilicateglasstube160mmlong,havinganexternaldiameterof6mmandaninternaldiameterof3mm,plugged towardsoneendwithglasswool.Then100mgofTenaxTAbeads(B.3.3)arepackedintothetube,whichisclosedwitha glasswoolplug. B.4.3 Ther
41、modesorptioncoldtrapinjector ,forthetransferofthesamplefromtheabsorbenttrap(B.4.2)tothe gaschromatograph(B.4.4)(seefigureB.2). B.4.4 Gaschromatograph ,withelectroncapturedetectorandintegrator,andanonpolartypecapillarycolumn. Thecolumnistypically12mlongwith0,2mminternaldiameter,coatedwithafilmof0,33m
42、 mthicknessof 100%( m/m)dimethylpolysiloxane. B.5Procedure B.5.1Preparationofglassware Cleanallglasswarebyheatingto200Cforatleast30min,thenallowtocooltoambienttemperaturebeforeuse. B.5.2Preparationoftestsample B.5.2.1 Cuta150mmdiametercirculardiscofthetestmaterial. B.5.2.2 Positionthediscbetweenthetwoflangeddomesofthetestcel
