這里(li)所指的材料選擇主要是瓦楞原紙（芯紙）和(he)箱紙板（面(mian)紙）的等級和(he)定量的選擇。

瓦(wa)楞(leng)原紙(zhi)(zhi)(zhi)(zhi)與箱紙(zhi)(zhi)(zhi)(zhi)板的等級配(pei)比原則如表1所示。即(ji)選(xuan)擇(ze)A、B級箱紙(zhi)(zhi)(zhi)(zhi)板時(shi)應(ying)盡量(liang)選(xuan)用A級瓦(wa)楞(leng)原紙(zhi)(zhi)(zhi)(zhi)；選(xuan)擇(ze)C級箱紙(zhi)(zhi)(zhi)(zhi)板時(shi)應(ying)盡量(liang)選(xuan)擇(ze)B級瓦(wa)楞(leng)原紙(zhi)(zhi)(zhi)(zhi)，依此類推。如果(guo)選(xuan)配(pei)不當，容(rong)易生產出搓板狀的瓦(wa)楞(leng)紙(zhi)(zhi)(zhi)(zhi)板，進(jin)而影(ying)響瓦(wa)楞(leng)紙(zhi)(zhi)(zhi)(zhi)箱的抗壓強度與美觀度。

表1 瓦楞原紙與箱紙板的等級配比原則(ze)

在定(ding)(ding)量(liang)配比方面(mian)(mian)，一般應滿足“1<面(mian)(mian)紙(zhi)(zhi)定(ding)(ding)量(liang)/芯紙(zhi)(zhi)定(ding)(ding)量(liang)≤2”，當面(mian)(mian)紙(zhi)(zhi)定(ding)(ding)量(liang)/芯紙(zhi)(zhi)定(ding)(ding)量(liang)≤1時(shi)，面(mian)(mian)紙(zhi)(zhi)會(hui)嚴(yan)重變(bian)形，出現搓板狀表面(mian)(mian)；當面(mian)(mian)紙(zhi)(zhi)定(ding)(ding)量(liang)/芯紙(zhi)(zhi)定(ding)(ding)量(liang)≥2.5時(shi)，瓦楞芯紙(zhi)(zhi)會(hui)由拱(gong)形結構(gou)變(bian)成矩形，影響瓦楞紙(zhi)(zhi)板的厚度(du)與抗壓強度(du)。

強度校核

強度校(xiao)核(he)的作用(yong)主(zhu)要有(you)兩方(fang)面：一(yi)方(fang)面是(shi)可以幫助確定面紙(zhi)和(he)(he)芯紙(zhi)的等級和(he)(he)定量(liang)，一(yi)方(fang)面是(shi)核(he)實設計方(fang)案(an)是(shi)否能(neng)滿足客戶要求。

首先，設計(ji)(ji)者(zhe)應先預先設定瓦(wa)楞紙箱的抗壓強度，即通(tong)過流通(tong)環境計(ji)(ji)算出瓦(wa)楞紙箱所(suo)需(xu)的抗壓強度，可通(tong)過以下(xia)公(gong)式(shi)計(ji)(ji)算。

P=kW（n-1）

式中，P指(zhi)瓦楞(leng)紙箱(xiang)抗壓(ya)強(qiang)度(du)，單位為(wei)N；k為(wei)堆(dui)碼(ma)安全(quan)系數，根據(ju)商品流通(tong)環境、時(shi)間等參數來確(que)定；W為(wei)瓦楞(leng)紙箱(xiang)裝貨后重(zhong)量，單位為(wei)N；n為(wei)堆(dui)碼(ma)層數，可以根據(ju)堆(dui)碼(ma)高度(du)和單個瓦楞(leng)紙箱(xiang)高度(du)求出(chu)。

設定好瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)箱(xiang)(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)抗(kang)(kang)(kang)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)之后，就可根(gen)據(ju)(ju)(ju)凱(kai)(kai)利(li)卡特(te)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)、馬(ma)(ma)爾(er)(er)-荷爾(er)(er)特(te)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)、沃爾(er)(er)夫公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)、馬(ma)(ma)基(ji)(ji)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)等瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)箱(xiang)(xiang)(xiang)(xiang)(xiang)抗(kang)(kang)(kang)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)計(ji)(ji)算(suan)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)進行材料調整和檢驗。但是(shi)每種公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)計(ji)(ji)算(suan)的(de)(de)(de)(de)(de)依據(ju)(ju)(ju)不盡相(xiang)同。凱(kai)(kai)利(li)卡特(te)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)主要(yao)依據(ju)(ju)(ju)瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)原紙(zhi)(zhi)和箱(xiang)(xiang)(xiang)(xiang)(xiang)紙(zhi)(zhi)板(ban)的(de)(de)(de)(de)(de)綜合(he)環(huan)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)進行計(ji)(ji)算(suan)，當需要(yao)核算(suan)瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)箱(xiang)(xiang)(xiang)(xiang)(xiang)尺(chi)寸能否滿足瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)箱(xiang)(xiang)(xiang)(xiang)(xiang)抗(kang)(kang)(kang)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)時，通常采用(yong)凱(kai)(kai)利(li)卡特(te)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)，計(ji)(ji)算(suan)簡便(bian)、實(shi)用(yong)；馬(ma)(ma)爾(er)(er)-荷爾(er)(er)特(te)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)是(shi)根(gen)據(ju)(ju)(ju)瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)板(ban)內(nei)、外面紙(zhi)(zhi)的(de)(de)(de)(de)(de)橫向康哥(ge)拉平(ping)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)平(ping)均值(zhi)來計(ji)(ji)算(suan)，由于康哥(ge)拉平(ping)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)測試(shi)儀的(de)(de)(de)(de)(de)使用(yong)在國際上(shang)并(bing)不普(pu)遍，所以馬(ma)(ma)爾(er)(er)-荷爾(er)(er)特(te)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)尚未廣泛應用(yong)；沃爾(er)(er)夫公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)是(shi)以瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)板(ban)的(de)(de)(de)(de)(de)邊(bian)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)和厚度(du)(du)(du)(du)(du)(du)(du)作為(wei)參數(shu)，以瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)箱(xiang)(xiang)(xiang)(xiang)(xiang)周(zhou)長(chang)(chang)、長(chang)(chang)寬(kuan)比和高度(du)(du)(du)(du)(du)(du)(du)作為(wei)結構(gou)影響因素來計(ji)(ji)算(suan)抗(kang)(kang)(kang)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)；馬(ma)(ma)基(ji)(ji)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)則把瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)板(ban)的(de)(de)(de)(de)(de)邊(bian)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)和挺度(du)(du)(du)(du)(du)(du)(du)作為(wei)影響瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)箱(xiang)(xiang)(xiang)(xiang)(xiang)抗(kang)(kang)(kang)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)的(de)(de)(de)(de)(de)主要(yao)因素，而且(qie)認為(wei)瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)箱(xiang)(xiang)(xiang)(xiang)(xiang)抗(kang)(kang)(kang)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)隨(sui)瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)箱(xiang)(xiang)(xiang)(xiang)(xiang)周(zhou)長(chang)(chang)的(de)(de)(de)(de)(de)平(ping)方根(gen)而變化，當設計(ji)(ji)時主要(yao)考慮瓦(wa)(wa)(wa)(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)箱(xiang)(xiang)(xiang)(xiang)(xiang)各個垂直箱(xiang)(xiang)(xiang)(xiang)(xiang)面所能承擔的(de)(de)(de)(de)(de)抗(kang)(kang)(kang)壓(ya)(ya)(ya)(ya)強(qiang)(qiang)(qiang)度(du)(du)(du)(du)(du)(du)(du)時，采用(yong)馬(ma)(ma)基(ji)(ji)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)公(gong)(gong)(gong)(gong)(gong)式(shi)(shi)(shi)(shi)比較適用(yong)。

獲得(de)瓦楞(leng)紙箱檢驗抗(kang)壓強(qiang)度后，我們(men)就可以根據預定(ding)壓力(li)與(yu)檢驗壓力(li)的(de)差(cha)值，適(shi)當調整原紙材料，以便達到客戶所需(xu)的(de)抗(kang)壓強(qiang)度。

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