瓦楞(leng)板(ban)紙(zhi)(zhi)平整度(du)是紙(zhi)(zhi)箱生產(chan)(chan)(chan)技(ji)術中的重要指標(biao)之一，它(ta)直接(jie)關(guan)系到(dao)產(chan)(chan)(chan)品(pin)印(yin)刷、模切(qie)或開槽切(qie)角的質量。瓦楞(leng)板(ban)紙(zhi)(zhi)平整度(du)差，會產(chan)(chan)(chan)生瓦楞(leng)紙(zhi)(zhi)板(ban)多種(zhong)拱(gong)形狀、機(ji)(ji)械化吸附(fu)式送印(yin)時容(rong)(rong)易(yi)卡住(zhu)及造(zao)(zao)成(cheng)紙(zhi)(zhi)板(ban)報廢而被迫(po)停(ting)機(ji)(ji)清(qing)理;雙色印(yin)刷或多色印(yin)刷中容(rong)(rong)易(yi)產(chan)(chan)(chan)生著墨不(bu)勻(yun)、套色不(bu)準、顏色疊邊(bian)出現(xian)空(kong)隙(xi)等;印(yin)開機(ji)(ji)上開槽尺(chi)寸位(wei)移(yi)，紙(zhi)(zhi)箱上下搖(yao)蓋重疊或不(bu)合縫(feng);模切(qie)送料同樣會產(chan)(chan)(chan)生卡住(zhu)和尺(chi)寸位(wei)移(yi)等弊病(bing)，均有可能導致正片紙(zhi)(zhi)板(ban)次廢、或設備損傷而被迫(po)停(ting)機(ji)(ji)整理。總之，紙(zhi)(zhi)板(ban)平整度(du)差會使(shi)送料不(bu)便(bian)并造(zao)(zao)成(cheng)生產(chan)(chan)(chan)過程中次廢品(pin)增多。

瓦楞紙板(ban)平整度差的外觀形(xing)狀(zhuang)大體分為三(san)種：橫向拱(gong)形(xing)、縱向拱(gong)形(xing)和任意拱(gong)形(xing)。

橫向拱形，是指(zhi)沿著瓦楞方向產生的拱形。

縱向拱(gong)形，是(shi)指(zhi)紙板沿著生產(chan)線速度(du)方向產(chan)生的拱(gong)形。

任(ren)意拱(gong)(gong)(gong)(gong)形，是指(zhi)沿著任(ren)意方向產生起伏的拱(gong)(gong)(gong)(gong)形。面紙表面拱(gong)(gong)(gong)(gong)起的稱為(wei)正(zheng)拱(gong)(gong)(gong)(gong)形，里紙表面拱(gong)(gong)(gong)(gong)起的稱為(wei)負拱(gong)(gong)(gong)(gong)形，面里紙表面各(ge)有起伏的稱為(wei)正(zheng)負拱(gong)(gong)(gong)(gong)形。