瓦楞紙板粘合強度是指瓦(wa)(wa)楞(leng)(leng)紙(zhi)(zhi)板(ban)粘(zhan)(zhan)合(he)后，面紙(zhi)(zhi)、里(li)紙(zhi)(zhi)或芯紙(zhi)(zhi)與瓦(wa)(wa)楞(leng)(leng)楞(leng)(leng)峰形成的(de)(de)結合(he)面所能(neng)承受的(de)(de)最大(da)分離力。GB/T6544—2008附錄B中指明粘(zhan)(zhan)合(he)強(qiang)度(du)是在規定的(de)(de)試(shi)驗條件下，分離瓦(wa)(wa)楞(leng)(leng)紙(zhi)(zhi)板(ban)單位楞(leng)(leng)長所需(xu)的(de)(de)力。同時又被(bei)稱作剝離強(qiang)度(du)，以(yi)每米（楞(leng)(leng)）牛頓（N/m）表示(shi)。它是反映瓦(wa)(wa)楞(leng)(leng)紙(zhi)(zhi)板(ban)粘(zhan)(zhan)合(he)質量優劣的(de)(de)一個關鍵物(wu)理(li)量，是考核瓦(wa)(wa)楞(leng)(leng)紙(zhi)(zhi)箱(xiang)物(wu)理(li)性能(neng)的(de)(de)重要(yao)技術指標之(zhi)一。良好的(de)(de)粘(zhan)(zhan)合(he)質量，可以(yi)提(ti)高瓦(wa)(wa)楞(leng)(leng)紙(zhi)(zhi)箱(xiang)的(de)(de)抗壓強(qiang)度(du)、邊(bian)壓強(qiang)度(du)、戳穿強(qiang)度(du)等物(wu)理(li)指標。因此，粘(zhan)(zhan)合(he)強(qiang)度(du)的(de)(de)正確測試(shi)成為瓦(wa)(wa)楞(leng)(leng)紙(zhi)(zhi)箱(xiang)質量檢(jian)測的(de)(de)重要(yao)部分，有必要(yao)對(dui)此加以(yi)強(qiang)調，從而保證對(dui)瓦(wa)(wa)楞(leng)(leng)紙(zhi)(zhi)箱(xiang)質量合(he)格(ge)與否做出正確判斷。

瓦楞紙板粘合強度的測試原理是將針形附件插入試樣的楞紙和面（里）紙之間（或楞紙和中紙之間），然后對插有試樣的針形附件施壓，使其做相對運動，直至被分離部分分開。此時楞峰與面紙或楞峰與里紙、芯紙結合所承受的最大分離力經公式計算后即為粘合強度值。施加的拉力是通過插入瓦楞的上下兩組插棒產生的，故本實驗又稱為插針膠合強度試驗。所用儀器為壓縮強度測定儀，儀器應符合GB/T6546規定的壓縮強度測定儀的技術要求。取樣的裝置應符合GB/T6546規定的切刀和要求。附件是由上部分附件和下部分附件組成，是對試樣各粘著部分施加均勻壓力的裝置。每部分附件由等距插入瓦楞紙板空間中心的針式件和支撐件組成，針式件和支撐件的平行度偏差應小于1%。
粘合強(qiang)度(du)(du)(du)的(de)(de)(de)(de)(de)測試(shi)(shi)(shi)(shi)(shi)(shi)(shi)方法：按(an)照(zhao)國家標準GB/T 6544-2008中(zhong)(zhong)(zhong)附(fu)錄B“瓦(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)板(ban)(ban)粘合強(qiang)度(du)(du)(du)的(de)(de)(de)(de)(de)測定”要求(qiu)進行(xing)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗。試(shi)(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)的(de)(de)(de)(de)(de)采取(qu)按(an)GB/T 450進行(xing)，試(shi)(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)的(de)(de)(de)(de)(de)處理及測試(shi)(shi)(shi)(shi)(shi)(shi)(shi)和(he)(he)環境條(tiao)件應(ying)按(an)GB/T 10739要求(qiu)進行(xing)，嚴格(ge)確(que)定溫濕度(du)(du)(du)。試(shi)(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)的(de)(de)(de)(de)(de)制備應(ying)從樣(yang)品中(zhong)(zhong)(zhong)切取(qu)10個(ge)單瓦(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)板(ban)(ban)、或20個(ge)雙(shuang)瓦(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)板(ban)(ban)或30個(ge)三(san)(san)瓦(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)板(ban)(ban)（25±0.5）mm×（100±1）mm的(de)(de)(de)(de)(de)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)，瓦(wa)楞(leng)(leng)(leng)(leng)方向應(ying)與(yu)(yu)短邊(bian)方向一致。試(shi)(shi)(shi)(shi)(shi)(shi)(shi)驗時，先將(jiang)被測試(shi)(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)裝(zhuang)入(ru)附(fu)件，將(jiang)帶有(you)兩排金(jin)屬棒的(de)(de)(de)(de)(de)針形附(fu)件插入(ru)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)的(de)(de)(de)(de)(de)面(mian)(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)與(yu)(yu)芯紙(zhi)(zhi)(zhi)(zhi)(zhi)之(zhi)間(jian)，并對好支撐柱，注意(yi)不要破壞試(shi)(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)，如下(xia)圖(tu)(tu)所示。然(ran)后將(jiang)其(qi)放(fang)在壓(ya)縮(suo)儀下(xia)壓(ya)板(ban)(ban)的(de)(de)(de)(de)(de)中(zhong)(zhong)(zhong)心位置(zhi)。開動壓(ya)縮(suo)儀，以(yi)（12.5±2.5）mm/min的(de)(de)(de)(de)(de)速度(du)(du)(du)對裝(zhuang)有(you)試(shi)(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)的(de)(de)(de)(de)(de)附(fu)件施壓(ya)，直到楞(leng)(leng)(leng)(leng)峰和(he)(he)面(mian)(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)（或里/中(zhong)(zhong)(zhong)紙(zhi)(zhi)(zhi)(zhi)(zhi)）分(fen)離(li)為止。記錄顯示的(de)(de)(de)(de)(de)最大力，精確(que)至(zhi)1N。在下(xia)圖(tu)(tu)中(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)右圖(tu)(tu)所示的(de)(de)(de)(de)(de)分(fen)離(li)是楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)與(yu)(yu)里紙(zhi)(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)分(fen)離(li)，共插入(ru)了7根針，有(you)效分(fen)離(li)了6根楞(leng)(leng)(leng)(leng)。對于單瓦(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)板(ban)(ban)，應(ying)分(fen)別(bie)測試(shi)(shi)(shi)(shi)(shi)(shi)(shi)面(mian)(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)與(yu)(yu)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)、楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)與(yu)(yu)里紙(zhi)(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)分(fen)離(li)力各(ge)5次，共測10次；雙(shuang)瓦(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)板(ban)(ban)則應(ying)分(fen)別(bie)測試(shi)(shi)(shi)(shi)(shi)(shi)(shi)面(mian)(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)與(yu)(yu)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)1、楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)1與(yu)(yu)中(zhong)(zhong)(zhong)紙(zhi)(zhi)(zhi)(zhi)(zhi)、中(zhong)(zhong)(zhong)紙(zhi)(zhi)(zhi)(zhi)(zhi)與(yu)(yu)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)2、楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)2與(yu)(yu)里紙(zhi)(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)分(fen)離(li)力各(ge)5次，共測20次；三(san)(san)瓦(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)板(ban)(ban)則需共測30次。分(fen)別(bie)計(ji)算(suan)各(ge)粘合層(ceng)(ceng)分(fen)離(li)力的(de)(de)(de)(de)(de)平均值，然(ran)后計(ji)算(suan)各(ge)粘合層(ceng)(ceng)的(de)(de)(de)(de)(de)粘合強(qiang)度(du)(du)(du)，最后以(yi)各(ge)粘合層(ceng)(ceng)粘合強(qiang)度(du)(du)(du)的(de)(de)(de)(de)(de)最小值作為瓦(wa)楞(leng)(leng)(leng)(leng)紙(zhi)(zhi)(zhi)(zhi)(zhi)板(ban)(ban)的(de)(de)(de)(de)(de)粘合強(qiang)度(du)(du)(du)，結果保(bao)留至(zhi)三(san)(san)位有(you)效數(shu)字。