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1 _ CompressionStrengthofCorrugat edictingCompressionStrengthof McKee sequationforpredictingthecompressionstre ngthofthecorrugated States Itsmainconstituentistheedgecrusbvalueoft hecorrugatedboard TherefOre McKee sequationisexpectedtobemorepreciseinpred ictingthecompressionstrengthofthecorruga tedboxratherthanKellicutt crushvalueofthecontainerboard Furthermore thecalculationofMcKee sequationincIudingthesquarero hanthatofKellicutt.

2 Sequationincludingthecubicroot Thelatterrequiresafunctionalcalculator commonrootkevca1culator Thissimplicityisconsideredtobe edStatesOntheotherhand McKee'sequationhasadifficultyindecidingt heappropriatecontainer boards ntheaggregatevalueofthecompressionstreng thofthecorrugatedboardConsideringthese,I developedanewequationwhichisb heringcrushvalueandthesquarero easytocalculateandeasytodecidecontainerb oard KeYwords McKee sequation Compressionstrength Corrugatedbox Corrugatedsheetthickness Edgecrushvalue Perimeter Predictingequation Rootkeycalculator McKee McKee Kellicutt McKee

3 5 8 ( ]'/ ( ) 332 5-14-8 RENGOCO LTD PackageEngineeringCenter 5-14-8,RyokeKawaguchi-shi Saitama, (l in (l in ` in CMcKee Kellicutt-Kawabata RCMcKee QKellicutt QKellicutt Kellicutt-Kawabata , P=.)))

4 ( ) `Zo" ..(2) lb in in .. (3) lb in in in 1 2 CMcKee KQKellicutt QKellicutt R McKee ThelnstituteofPaperChemisFtry (Edgewisecompressivestrength ') PC ~.

5 3 McKee PC lb k R I/bL6jVb ( (JISZO401 c McKee kgf 50 kgf 6 l 2 l 3 PMC L660 PmhI/ )! (4) kgf kgf 50 JISZO401 c QKellicutt Kellicutt-Kawabata 2 4 McKee KQKellicutt RCMcKee k PKK L3386 Rxh1/ )!

6 (5) 7 = ..(5) ` ` 64 729 QKellicutt 64 Kellicutt PKK )'/ ..(6)PMK )!/ .. L3386hI/2 PKK )'/3 PMK )'/ (9) PKK kgf Rx: kgf 6 JISP8126 III II III 0 Fig 2 McKee PKK McKee McKee FINBORD McKee ( ]'/ 3 5 ( ]

7 '/2---- 13 5 L3386hI/2 L3333hl/2 4 3 /2 l 2 2 3 '/ ..--- 7. New l QKellicutt PMK 2 3 ( ]! 14 PME 3 5 ( ]!/ .. 15 QKellicutt ` / (4 3) / (2 3) / Thicknessofsheet PMK 2 3 '/2 )'/ .. PMK 2 3 ( ]!))

8 / .. 12 Vb 99 Fig. Kellicutt McKee Kellicutt .. (2 3) ..(3 5) McKee Kellicutt TabIe2 TableofconstantsEquationPKMK 5 8 ( ]I/ 8 Constant McKee Kellicutt ( McKee Kellicutt h > (5 8 cPKMK 5 8)))

9 ( (16 (5/8 ( +W)h]' 700 100 Measuredvalue kgf Correlationbetweenmeasuredandestimatedva Iue100 Fig. /< 320 C, % D ugatedBox II II q527RM---reinforcedmedium L+W 8 20 C, %M ugatedBoX M II reinforcedmedium IIu 0 338xI70508x508438x324292 1 McKee, ,Gander, Wachuta PaperboardPackaging, (8) 1963 (1) 1997 3 1978 ( 1996 ( 1997)))))