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Reduce the stock of base paper and save more than 600,000 yuan per year

Ifasmallfactoryuses2,000tonsofpaperpermonthandhas4,000tonsofbasepaperinstock,itmeansthatthestockpaperturnoverrateis2,whichmeansthatthebasepaperwillbeusedinthewarehousefor2monthsafteritisreturnedtothefactory.Thatis,howmuchistheinventoryfundspressed?Theaveragesellingpriceof4000tonsofrawpaperis2700tons,whichis:10.8millionyuan.Iftheinventoryisreducedto2,000tonsofstockpaper,yourcompanywillrelease5.4millionyuan,whichiscalculatedaccordingto1%interestonconventionalfinancingcosts.Save54,000/month.Annualsavingsof648,000yuan. Itcanbeseenfromthissmallfactorythatthecontrolofthestockpaperturnoverrateisveryimportant.Nowtherearesomeexcellentcompaniesthathavedone15daysaweek,with4,000tonspermonthandonly2,000tonsininventory.Howdidtheydoit?Next,let’ssharethe“cheats”thatreducethestockofbasepaper. "Cheats"toreducethestockofrawpaper 1.Makeastockofrawpaperandaforecasttableofdemandforrawpaper Thebasepaperinspectionpersonnelcollecttheactualamountofbasepaperused(months)asareferencebasisforfuturepurchaseofbasepaper,andincreasetheaccuracyofdemandforecasting.Takingthemonthlyusageasareference,itwillignorethedifferencebetweenthemaximumandminimumvalues​​ofactualusage.Therefore,thetotalusageofeachquarteriscalculated,andthendividedbythenumberofmonths,thedataobtainedismoreobjective.Duetochangesincustomersandordertypes,theusagescaleisre-createdeveryquarter. 2.Whenreceivingtheoriginalpaper,markthestoragedate Whenunloading,usethewoodpenbooktowritethedateofthewarehousefortheoperatortoimplementthematerialfirstinfirstoutprincipleofturnoveroperation. 3.Simplifythebasepapermaterialandpapertype Thepaperwebandmaterialtypesaretoocomplicated.Unpopularmaterial,ifthecustomerdoesnothavethispaperwidthandmaterialrequirementsinthefuture,itisnoteasytoconvertthebasepaper,anditiseasytocauseinventory.Reducethenumberofunpopularpaperwebsandmaterials.(Undertheorderofunpopularmaterials,itisoftennecessarytomatchthefullwidthofthepapermakingmachine,resultinginalargeincreaseinunnecessarypaperwebs)Negotiatewiththesalesstafftomatchwiththeexistingcustommaterialstomeetcustomerneeds. 4.Salesprovidereliablebasepaperdemandforecast Theestimateddemandforbasepaperisbasedontheaveragemonthlyusageinthepast.Whenthesalesstaffundertakesorclosesthelargeorder,itshouldprovidetherelevantdemandforecastpurchasesoastocontrolthepurchasevolumeoftheoriginalpaper.Theestimatedamountoftheoriginalpaperprovidedbythesalesstaff,afterafollow-upinvestigation,foundthattherewasoftenagapbetweentheactualamountandtheactualusage,whichwaslikelytocauseadelay. 5.Conversionandresaleofpaperbasepaper Transferstagnantbasepapertopaperthatdoesnotrequirepaperqualityintheorder.Iftheoriginalpaperthatthefactorycannotusecanbeconsideredforresaletoothermanufacturers.
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15
2015-09

[Watt line technology] Find out 9 reasons, the corrugation will never be flattened

Release time : 2015-09--15 Traffic : 0
ReasonsforCorrugatedFlattenedandCountermeasures 1.Reason:Corrugatedrollersarenotparallel(corrugatedinclined). Measures:Adjustthecorrugatedrollertobeparallel. 2.Reason:thecorrugatedheightwaslowatthebeginning. Measures:Replacethecorrugatedroller. 3.Reason:Afterthecorrugationisformed,itiscrushedagain. Measures:Check,adjustorrepairallbitepointsthatmaycauseflatteningofthecorrugation;papermachineorpaperfeedgateorturn-downroller,cross-cutknifepaperfeedroller,dryendcoatingorpinchtearingbelt,tachometerwheelThecutterisoutofcontrol,orthelinespeedoftheentiretileisoutofcontrol,thehotplateisnotstraight,theconveyorliftingdeviceisnotfullyupanddown,thereisdirtonthehotplate,thepaperplatenrollerorhotplatepressuresystemisnotparallel,orthepositionisimproperlyadjusted,andthebitepointThepaperrollsoftheold-stylepaperwebtensioneranddouble-sidedmachinegluingmachinearenotparallel,ortheappliedpressureistoolarge,andthesingle-sidedpaperwebontheflyoverhastensionandliftingconveyorproblems. 4.Reason:toomuchtensiononthecorepaperroll. Measures:Reducethebrakingoftheoriginalpaperholder;checkthepositionofthepreprocessor,dry,repairorreplacethepre-processordriveengine. 5.Reason:Becausethespraydevicespraystoomuchsteam,thecorepaperistoowet. Measures:Reducetheamountofsteamsprayedonthecorepaper. 6.Reason:Thegluingdevicecausesthecorrugationofanybitingpointtocollapse. Measures:Reducetheamountofglueonthesingle-sidedpaperboardoroneofthemunderthepremiseofensuringgoodadhesionandnowarpage;thehumidityofthecorepaperrollistoohigh,reducetheamountofsteamsprayorturnoffthespraydeviceorreplacethecorepaperPaperroll. 7.Reason:uneventensionoftheupperandlowerconveyorbeltsofthedouble-sidedmachine(obliquecorrugated). Measures:Keepthespeedoftheconveyorbeltconsistent. 8.Reason:lowflatandflatcorrugated. Measures:Checkthefactorsthatcausethecorrugationtocollapseafterthecorrugationisformed,andcheckthecauseofthecorrugationtilt. 9.Reason:Thepressureresistanceofthecorepaperistoolow. Measures:Replacethecorepaperrollanddiscusswiththebasepapersupplier. 2.Reducethestockofbasepaper,savingmorethan600,000yuanperyear Ifasmallfactoryuses2,000tonsofpaperpermonthandhas4,000tonsofbasepaperinstock,itmeansthatthestockpaperturnoverrateis2,whichmeansthatthebasepaperwillbeusedinthewarehousefor2monthsafteritisreturnedtothefactory.Thatis,howmuchistheinventoryfundspressed?Theaveragesellingpriceof4000tonsofrawpaperis2700tons,whichis:10.8millionyuan.Iftheinventoryisreducedto2,000tonsofstockpaper,yourcompanywillrelease5.4millionyuan,whichiscalculatedaccordingto1%interestonconventionalfinancingcosts.Save54,000/month.Annualsavingsof648,000yuan. Itcanbeseenfromthissmallfactorythatthecontrolofthestockpaperturnoverrateisveryimportant.Nowtherearesomeexcellentcompaniesthathavedone15daysaweek,with4,000tonspermonthandonly2,000tonsininventory.Howdidtheydoit?Next,let’ssharethe“cheats”thatreducethestockofbasepaper. "Cheats"toreducethestockofrawpaper 1.Makeastockofrawpaperandaforecasttableofdemandforrawpaper Thebasepaperinspectionpersonnelcollecttheactualamountofbasepaperused(months)asareferencebasisforfuturepurchaseofbasepaper,andincreasetheaccuracyofdemandforecasting. Takingthemonthlyusageasareference,itwillignorethedifferencebetweenthemaximumandminimumvalues​​ofactualusage.Therefore,thetotalusageofeachquarteriscalculated,andthendividedbythenumberofmonths,thedataobtainedismoreobjective.Duetochangesincustomersandordertypes,theusagescaleisre-createdeveryquarter. 2.Whenreceivingtheoriginalpaper,markthestoragedate Whenunloading,usethewoodpenbooktowritethedateofthewarehousefortheoperatortoimplementthematerialfirstinfirstoutprincipleofturnoveroperation. 3.Simplifythebasepapermaterialandpapertype Thepaperwebandmaterialtypesaretoocomplicated.Unpopularmaterial,ifthecustomerdoesnothavethispaperwidthandmaterialrequirementsinthefuture,itisnoteasytoconvertthebasepaper,anditiseasytocauseinventory.Reducethenumberofunpopularpaperwebsandmaterials.(Undertheorderofunpopularmaterials,itisoftennecessarytomatchthefullwidthofthepapermakingmachine,resultinginalargeincreaseinunnecessarypaperwebs)Negotiatewiththesalesstafftomatchwiththeexistingcustommaterialstomeetcustomerneeds. 4.Salesprovidereliablebasepaperdemandforecast Theestimateddemandforbasepaperisbasedontheaveragemonthlyusageinthepast.Whenthesalesstaffundertakesorclosesthelargeorder,itshouldprovidetherelevantdemandforecastpurchasesoastocontrolthepurchasevolumeoftheoriginalpaper.Theestimatedamountoftheoriginalpaperprovidedbythesalesstaff,afterafollow-upinvestigation,foundthattherewasoftenagapbetweentheactualamountandtheactualusage,whichwaslikelytocauseadelay. 5.Convertingandresellingthebasepaper Transferstagnantbasepapertopaperthatdoesnotrequirepaperqualityintheorder.Iftheoriginalpaperthatthefactorycannotusecanbeconsideredforresaletoothermanufacturers.
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23
2012-07

On China's printing industry "come in and go out" is imperative

Release time : 2012-07--23 Traffic : 0
Inrecentyears,China'sprintingindustryhasmaintainedarapiddevelopmentrate.Duringthe"EleventhFive-YearPlan"period,theaverageannualgrowthrateofChina'sprintingindustrywas19.34%,muchhigherthanthe11.2%growthrateofthenationaleconomyduringthesameperiod.DatashowthatlastyearthetotaloutputvalueofChina'sprintingindustrywas867.7billionyuan,anincreaseofmorethan12%year-on-year;totalassetswere1.14trillionyuan,anincreaseofmorethan25%;totalprofitwasmorethan70billionyuan,anincreaseofmorethan8%;theamountofforeignprocessingtradeItwas68billionyuan,anincreaseof2.9%;thenumberofprintingcompanieswas1025,000,adecreaseof1.8%;thenumberofemployeeswas3.56million,adecreaseof2.7%.ThebusinessmeetingbetweentheprintingenterpriseandtheChinaChamberofCommerceandIndustrysponsoredbythe2012ShanghaiInternationalPrintingWeekOrganizingCommitteeandundertakenbytheShanghaiCommercialDailywasgrandlyheldatShanghaiInternationalPrintingWeek.Therearemorethan30representativesfromchambersofcommerceinnearly20countriesandregions,headsofrepresentativeofficesofforeigngovernmentsinShanghai,foreignmanufacturingcompaniesandbuyers,morethan30indifferentplacesintheShanghaiChamberofCommerce,relevantchambersofcommerceoftheShanghaiFederationofIndustryandCommerce,Shanghai-relatedAtotalof120representativesfromindustryassociationsanddomesticmanufacturersandbuyersparticipatedinthemeeting.Atthemeeting,Chineseandforeigncompaniescommunicatedaboutpossiblecooperationintheprintingindustry.Afterthemeeting,therepresentativesalsovisitedtheexhibitorsofthisprintingexhibition.Atthemeeting,representativesofforeignchambersofcommerceproposedtotheorganizerhowtostrengthencommunicationandcooperationbetweenforeignanddomesticcompaniesintheprintingindustry."Welcomein"and"goout"arethecurrentanswers."China'sprintingindustryiscurrentlyinstrongdemand,andoneofthewaystostrengthencooperationathomeandabroadistowelcomeforeignprintingcompaniestoincreaseinvestmentinthecountry."ZhouJianping,directorofthePrintingManagementOfficeoftheShanghaiPressandPublicationBureau,saidabovewhenansweringquestions.Inaddition,duetotheeconomicdownturn,foreignprintingcompaniesmaynotbeabletoundertakedomesticandregionalbusiness,soChineseprintingcompanieshavealsobeenconsideredbyDirectorZhouasoneofthemoredirectwaysofcooperation.Ricardo,thechiefrepresentativeoftheShanghaiRepresentativeOfficeoftheForeignTradeBureauoftheValenciaAutonomousRegionofSpain,saidinaninterviewwiththeCommercialDailythatparticipatingintheexhibitionisthemostdirectandeffectivewayforforeigncompaniestostrengthencommunicationwithlocalChinesecompanies.Secondly,throughthematchmakingoftheprintingindustryassociation,theeffectisalsoveryobvious.Afterthemeeting,therepresentativesoftheforeignchambersofcommerceinShanghaiattendedtheprintingexhibitionwithgreatinterest.InfrontoftheboothofShanghaiJielongIndustrialGroupCo.,Ltd.,thedelegateswereattractedbysomepackagingandprintingproductswithChinesecharacteristics.Thepersoninchargeoftheboothintroducedtoforeignbusinessrepresentatives.ThecompanyundertakestheprintingofreferencebookssuchasCihai.Theprintingisrequiredtohaveanantiquecharm.Thesespecialprintingshaveattractedtheattentionofforeignbusinessrepresentatives."PolishcompanieswillnotdesignateanyprintingcompanytoprintandpackageproductsfortheirdomesticchambersofcommerceinChina.Mostofthemlookforpartnersthroughexhibitionsandotherforms."MaciejLojek,presidentofthePolishChamberofCommerceinChina,toldBusinessDailythattheprintingneedsofPolishcompaniesinChinaarehugeTherearehundredsofmillionsofeurosindemand,mostofwhichinvolveconsumerpackaging,especiallyfood.Therefore,itisthebestwayforPolishcompaniestocooperatewithChineseprintingcompaniesthroughexhibitionsandconferences.In2008,MiaoZhicheng,whowasthenthevicechairmanoftheAmericanChamberofCommerceinShanghaiandthecurrentheadofMiaoZhichengEnterpriseManagementConsultingShanghaiCo.,Ltd.,saidinaninterviewwithareporterfromBusinessDailythattheconferenceisagoodplatformforcooperationbetweenforeigncompaniesanddomesticprintingcompaniesDocking."AlthoughthepackagingproductssuchaspackagingrequiredbyAmericancompaniesaregenerallydesignedabroadandthenhandedovertoChineseprintingcompaniesforproduction,thelocalizedsalesofgoodsmakeitparticularlyimportanttoincorporatelocalizedelements,whichrequiresForeignpurchasingcompaniescommunicatequicklyandeffectivelywithChineseprintingcompaniessothatprintingcompaniescanunderstandtheiractualneeds."
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23
2012-07

Baler speeds up the pace of modern industrial development

Release time : 2012-07--23 Traffic : 0
Inthepast,whenwementionedthebaler,weoftenfocusedonitsroleinthecommodityeconomy.Itisundeniablethatthebalerhasbroughtalotofchangestothecommoditypackagingmarket.Theneatandstandardizedpackagingandstrappingmakethetransportationandhandlingofcommoditiesabreeze.However,thebaleralsohasagreatuseinacceleratingthedevelopmentofmodernindustry,providinghelpforthedevelopmentoftheseindustriesandalsoaprocessofexpandingitsowndevelopmentfield.Aprominentfeatureofthedevelopmentofmodernindustryistheoutputandcirculationofbulkgoods.Forexample,modernconstructionprojectsoftenrequirebulkbuildingmaterials.Thenthesebuildingmaterialsneedtobestrappedandpackedbyabalerduringtransportation.Onlyinthiswaycanlong-distancetransportationbebetter.Inindustrialproduction,itcanalsobemovedandhandled.Therefore,theuseofbalerintheseaspectsisindispensable.Withtheaccelerationofthedevelopmentofmodernindustry,thesesupportingfacilitieshavebecomemoreurgent.Atthesametime,withthereformandinnovationofmodernscienceandtechnology,thedevelopmentandprogressofbalertechnologyandtechnologyhavegivenmoredemandforindustrialization.Inthedevelopmentofindustrialization,therearedefinitelymanyrelatedindustriesthathavecontributedtotheirdevelopmentandprovidedassistance,andthebalerisasmallpartofit.Althoughitcannotbecomparedwithotherlargemechanicalequipment,itisthissmallforce.Ithasalsoplayedanirreplaceableroleinpromotingthedevelopmentoflargeindustries.Withouttheexistenceofpackagingandstrappingequipment,inmodernindustries,itisnoteasytoachievethetransportationandhandlingofobjects,whichwillbringobstaclestodevelopment.Thevalueofathingliesinwhatkindofhelpandbenefitsitbringstosocietyandothers.Thisisthemeaningofexistence.Thedevelopmentofthebalerindustryhasbeengraduallyspreadtotheproductionofvariousindustriesinthesociety.Itbringsconveniencetoproductionandpracticalitytoconsumers.Therefore,forthefuturedevelopmentofthebaler,constantlyseekingnewdevelopmentideastomaximizeitsownvalueiswhatthebalerenterpriseneedstodoandmustdo.
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03
2011-10

Discussion on Several Technology of Cardboard Decoration and Deep Processing

Release time : 2011-10--03 Traffic : 0
Cardboardisthemainrawmaterialfortheproductionofcorrugatedboxes,cartonsandotherproducts.Howitsperformancedirectlyorindirectlyaffectstheinternalqualityanduseeffectoftheproduct.Forcorrugatedboxes,cartonandotherpackagingproducts,ithaswearresistance,waterproofandmoistureresistance,andhashighstrengthandgoodairtightness,whichisthebasicqualityrequirementfortheusecharacteristicsofcardboard.However,theordinarypaperboardproducedbythepapermilloftendoesnothavegoodwearresistance,waterresistanceandmoistureresistance.Thestrengthandairtightnessofthecardboardvaryaccordingtothequalitygradeofthecardboard.Therefore,fromtheperspectiveofimprovingtheperformanceofcorrugatedboxesandcartons,itisnecessarytoprocessthesurfaceofthecardboardbysomenecessarytechnologicalprocessesinordertofundamentallyimprovetheperformanceandappearancequalityofthecardboard.1.Polishingprocessonthesurfaceofcardboard.Polishingisacommonprocessforpost-printingprocessingofpackagedproducts.Aftercoatingonthesurfaceoftheproduct,theprintedproductscanbeenhancedinwaterresistance,lightresistance,frictionresistanceandpollutionresistance.Itcanimprovethesurfacebrightnessoftheproductandgreatlyimprovethegradeoftheproduct.Varnisheshaveavarietyofstructures.Theyareusefulforoilyvarnishesvarnishedbyprintingpresses,water-basedandoilyvarnishesvarnishedbyvarnishers,aswellassolvent-basedvarnishesandUVvarnishes.Thecharacteristicsofglazingcoatingsaredifferent,andthetechnologicaleffectsofproductsurfaceprocessingarealsodifferent.Itisalsoabrightpaint,becauseofdifferentmaterialcharacteristicsandformulas,itsglosseffectandwearresistancearealsodifferent.Whencoatedwithmattepaint,thesurfaceoftheprintedproducthasalmostnoglossiness,butithasacertainartisticsense.Someproductshavemattpaint,andtheprocesseffectisnolessthanthatofbrightpaint.Regardlessofwhetheritisbrightormattpaint,thecoatingmusthavegoodwearresistancetoprotectthesurfaceoftheprintedproduct.Processcharacteristicsofoilyglazing.Whenapplyingoilyvarnishonaprintingmachine,thethicknessanddryingoftheglazecoatingarelimitedbythestructureofthemachine.Theglossandwearresistanceoftheprintedsurfacearenotasgoodasthoseofsolvent-basedorwater-basedvarnishesontheglazingmachine.Therefore,thiskindofglazingisgenerallyonlysuitableforordinaryproductswithsmallbatchesandlowqualityrequirements.Technicalcharacteristicsofsolventglazing.Thesurfaceglossandabrasionresistanceofproductspolishedwithsolventsarerelativelyhigh,butbecausethethinnerisanorganicsolvent.Suchastoluene,asthesolventevaporates,thecostofglazingpaintisalsolarge.Solventglazingcoatingshavepoorphysicalandchemicalresistance,andthecoatingsarepronetoyellowing,andsolventswithstrongodorsnotonlyeasilypollutetheenvironment,butalsohaveacertainimpactonproductionsafety.Therefore,theproductionsitemustpayattentiontoexhaustemissions,andthemachineuseselectricheatingpipesFordrying,attentionshouldbepaidtokeepthecardboardconveyedsmoothly,topreventthecardboardconveyingfrombeingskewedandblockingthedryingtunneltotouchtheelectricheatingtube,causingfiresafetyaccidents.Technicalcharacteristicsofwaterborneglazing.Thewater-basedglazingpainthastheadvantagesofcolorless,odorless,non-toxic,non-irritating,fastdryingofthecoating,wearresistance,hightemperatureresistance,noyellowing,nocolorchange,andhightransparencyandgloss,sothisprocessismoresuitableItisusedforsurfacefinishingoffoodpackaging.However,thesolventofthewater-basedglazingoiliswater,andtheprintedmatteriseasilydeformedafterbeingglazed.Itsabrasionresistanceissecondonlytosolventglazingcoatings.IftheouterlayerofcardboardispackedwithPVCplasticfilm,itiseasytosticktotheglazingfilmlayerandgraphicinkcoloroftheprintedproductduetothestickinessofthesurfaceofthePVCplasticfilm.Therefore,theouterpackagingmaterialisPVCplasticfilm,water-basedpaintshouldnotbeusedforvarnishingcardboard,butsolvent-basedwear-resistantvarnishshouldbeusedforvarnishing.TechnicalcharacteristicsofUVcoating.UVglazingistoapplyUVglazingoiltothesurfaceoftheprintedproducttoformahighglossfilmonthesurface.Aftertheglazedfilmlayerisirradiatedwithultravioletlight,photopolymerizationandphotocrosslinkingreactionsoccurinsidethecoating,andthenquicklysolidifyanddry,sothattherewillbenoadhesionqualityfailure,whichisconducivetoensuringtherapidoperationofsubsequentprocesses.TheUVglazedcoatinghastheadvantagesofwearresistance,chemicalresistance,chemicalresistance,andgoodstability.SincetheUVvarnishdoesnothavetheproblemofsolventevaporation,unlikethepollutionproblemcausedbythesolvent-basedglazingprocesstotheenvironment,anditsrelativelysmallamount,itsproductioncostismuchlowerthanthatofthelaminatingprocess.Therefore,itisanidealprocesstoreplaceplasticcoatingandsolvent-basedglazing.However,inproduction,theproblemthatshouldbenotedisthatUVpaintwillhaveacertainstimulatingeffectonhumanskin,anddirectUVlightwillalsocausecertaindamagetothehumanbody.ThecoatingwillproduceozoneafterdryingbyUVirradiation.TheproductionsiteshouldhavegoodVentilation.2.TherequirementsforglazingcoatingsforpaperpackagingproductsIntermsofproductuseandprocessingcharacteristics,glazin
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15
2011-09

On the face-to-face view of corrugated box

Release time : 2011-09--15 Traffic : 0
Corrugatedboxoverview Therearedifferentkindsofpackagingandtransportationintheworld,andthecorrugatedboxcanstandoutbecauseitissimple,lightweightandversatile,whichmakesproducttransportationandsaleseasier.Today'scorrugatedcartonoccupiesanimportantpositioninproductmarketing,anditsbrand-newimageisbornoutofaplain"paperbox".Pleasetakealookatthemultiplefunctionsofthecorrugatedbox:thestyle,shapeanddesignofthecartonmaketheproductpackagingfulloflife,andalsomaketheproductmoreefficientintransportationandstorage.Exaggeratedpatterns,eye-catchingcolorsanduniqueshapescanallattractattention,soastoachievetheeffectofpassingfastsales.Thecartonisprintedwithinformationaboutproductcontent,size,quantity,instructionsforuseandhandlinginstructions,etc.,sothatyourproductcanbedeliveredtothedestinationquicklyandintact.Corrugatedpaperproductscanuserecycledresourcesandaresuitableforrecyclingafteruse.Corrugatedboxesaremadeofwoodfibers,whichcanbedecomposedbynaturalaction;andthewoodwillnotdryupunderplannedplantingandharvesting.Mostofthediscardedcorrugatedcardboardboxescanberecycledtocreatenewpapermaterials,whichisagreatcontributiontoenvironmentalprotection. Whatiscorrugatedcardboard?Corrugatedcardboardisamulti-layeredadhesivebody,whichiscomposedofatleastonelayerofcorrugatedcorepapersandwich(commonlyknownas"pitsheet"or"corrugatedpaper")andonelayerofcardboard(commonlyknownas"cowhidecard").Ithashighmechanicalstrengthandcanwithstandcollisionsandfallsduringhandling.Theactualperformanceofthecorrugatedcartondependsonthreefactors:thecharacteristicsofthecorepaperandcardboardandthestructureofthecartonitself.ClassificationofcorrugatedcardboardAccordingtodifferentcombinations,corrugatedcardboardcanbedividedintothefollowingfivetypes:1)Thecardboardcomposedofalayerofcorepaperandkraftcardiscalled"corrugatedcardboard".Thecorrugatedcardboardisgenerallyonlyusedforcushion,spacingandwrappingirregularlyshapedobjects.2)Thecardboardconsistingofonelayerofcorepaperandtwolayersofupperandlowerkraftcardsiscalled"singlepitcardboard".3)Thetwo-layercorepaperissandwichedbetweenthree-layerkraftcardsandiscalled"double-pitcardboard".Double-pitpaperboardcanbecomposedofpitpaperwithdifferentpitwidthsanddifferentpaperquality,suchas"B"pitpaperand"C"pitpaper.4)Thethree-layercorepaperissandwichedbetweenfour-layerkraftcardsandiscalled"SankengCardboard".5)Thesuperstrongdoublebodypaperboardisdevelopedfromthesingle-pitpaperboard,andalayerofcorepaperinthemiddleisformedbystackingtwothickcorepapers.Whatisgratifyingisthattodaywecanproducemanydifferentcombinationsofcorrugatedboard,theseboardshavedifferentcharacteristicsandstrengthstomeetthechangingneedsofthemarket.TypesofpitsCorrugatedcardboardcanbefurthersubdividedaccordingtothesizeofthepitsonthecorepaper,thatis,itsheightandthenumberofpitsineachunit.Therearefourtypesofcorepaperpits.ThefollowingtableshowsthepaperboardproducedbyMitsubishiandLangstonpitmachines.Thecartoncausedbythicker"A"pitshasbettertopandbottomcompressivestrengththan"B"and"C",butthethinner"B"comparedto"A"and"B"pits"Thepitpatternhasbetterresistancetopressure.The"A"and"C"pitsareusedinthemanufactureofcartonsthatareunderpressureandrequirecushionsforpackaging.The"B"pitpatternissuitableforcartonmanufacturingwherethecapacityandspacearemoreimportant,andthestackingstrengthislessimportant.The"E"pitpatternhasthehighestcompressionresistance,butitsshockabsorptioncapacityisslightlyworse.Itismainlyusedforcorrugatedcardboardboxes(colorprinting)carryingheavyobjects. Corepapermaterials Thelargerthepitdiameterofcorrugatedcardboard,thestrongeritsrigidity.Thetoughnessofthepaperboardisderivedfromthecorepaperlayerwithouttheneedforthickandhardfillers.Thiscanreducetheweightofthecardboardanditscost.Thecorepapercanbemadeofsemi-chemicalpulp(whichprovidesthebestpaperstrength)andrecycledpaperstock.ThelatterisusedbyHongKongmanufacturersbecauseofitslowcost.Althoughthepaperstrengthisnotasgoodastheformer,itcanbeimprovedbyaddingstarchtothepapermill.Thepitpatternoccupiesacertainspaceinthecorrugatedpaper,anditsroleisalsoveryimportant.Throughit,itcanwithstandflatpressure,sidepressureandvariousotherirregularpressures. Cowhidecard Kraftcardsformtheinnerandouterlayersofcorrugatedcardboard,andtheirfunctionscanbestructuraland/ordecorative.Thevariouslayersofkraftcardsprovidevariouscharacteristicsforthecardboard,andthesecharacteristicscanbeexpandedthroughprocessingproceduressuchasbondingandwaxing. Enlightenmentofstructuralstrength Ifthestrengthofthecartondoesnotmeettherequirements,youneedtofindouttheproblem.Don'ttakeitforgrantedthatallcartonsmustbethickenedandhardened.Beawarethatitiscostlytomakesuch"feeding"cartons.Therefore,theproblemcartonshouldbestudiedandtherightmedicineshouldbetaken.Thescopeofinspectionshouldbevarious,suchaswhetherthecartonisdamagedduringtransportation,whetherthestackingmethodisimproper,whetheritisoverloaded,andwhetheritishandledproperly;perhaps,theproblemcanalsobetracedtothestoragemethodoftheemptybox.Whenyoutakeallmeasurestoreducelosses,donotlimityourselftothenarrowconceptof"thickeningandhardening".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