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目前,不(bu)干膠紙卷筒印(yin)(yin)刷工(gong)藝在快遞單(dan)印(yin)(yin)刷上(shang)廣泛應用(yong)。標簽紙專業介紹各種不(bu)干膠知識,詳細內容如下:
快(kuai)遞(di)單的底聯采用(yong)不(bu)干膠(jiao)方式,用無(wu)碳復(fu)寫紙(zhi)下(xia)紙(zhi)作(zuo)面紙(zhi),離型紙(zhi)作(zuo)底紙(zhi),復(fu)合(he)成(cheng)不(bu)干(gan)膠標簽(qian)紙(zhi)卷(juan),再進(jin)(jin)行卷(juan)筒印刷打孔(kong)(kong)、噴印條碼,*后與上聯(lian)、中(zhong)(zhong)間聯(lian)進(jin)(jin)行配頁,完(wan)成(cheng)快遞(di)單的(de)(de)制作(zuo)。打孔(kong)(kong)后的(de)(de)不(bu)干(gan)膠紙(zhi)在收(shou)卷(juan)過程(cheng)中(zhong)(zhong),靠(kao)近紙(zhi)'芯(xin)管的(de)(de)地(di)方,常(chang)出(chu)現面紙(zhi)與底紙(zhi)兩邊的(de)(de)對位孔(kong)(kong)移位問題,導致(zhi)孔(kong)(kong)位不(bu)齊。當(dang)孔(kong)(kong)位偏差超(chao)過0.5mm時,無(wu)法與上聯(lian)、中(zhong)(zhong)間聯(lian)配頁,產生(sheng)較大的(de)(de)損(sun)耗。
孔(kong)位偏(pian)差(cha)(cha)(cha)(cha)產生(sheng)的(de)(de)原(yuan)因(yin)不干膠(jiao)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)卷(juan)筒印刷過程中(zhong),采用(yong)聯機打(da)孔(kong)方式,在(zai)平張狀態下打(da)完孔(kong)后收(shou)卷(juan),面(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)朝外,底(di)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)朝內。收(shou)卷(juan)時,由于(yu)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)張厚度(du),面(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)和底(di)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)的(de)(de)收(shou)卷(juan)半徑存在(zai)細微差(cha)(cha)(cha)(cha)異,產生(sheng)周(zhou)(zhou)長(chang)(chang)(chang)差(cha)(cha)(cha)(cha),如圖1所示(shi)。同時,在(zai)收(shou)卷(juan)拉(la)力作用(yong)下,面(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)和底(di)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)產生(sheng)伸長(chang)(chang)(chang)形變,由于(yu)周(zhou)(zhou)長(chang)(chang)(chang)差(cha)(cha)(cha)(cha)的(de)(de)影(ying)響,面(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)的(de)(de)伸長(chang)(chang)(chang)量(liang)(liang)大于(yu)底(di)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)的(de)(de)伸長(chang)(chang)(chang)量(liang)(liang),其差(cha)(cha)(cha)(cha)值(zhi)用(yong)來消減周(zhou)(zhou)長(chang)(chang)(chang)差(cha)(cha)(cha)(cha)。作為(wei)不干膠(jiao)標簽紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi),面(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)與(yu)底(di)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)之間的(de)(de)結合(he)力較(jiao)小,當伸長(chang)(chang)(chang)量(liang)(liang)之差(cha)(cha)(cha)(cha)無法完全抵消周(zhou)(zhou)長(chang)(chang)(chang)差(cha)(cha)(cha)(cha)時,面(mian)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)與(yu)底(di)紙(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)產生(sheng)相對移動,原(yuan)來對齊的(de)(de)孔(kong)位出現(xian)偏(pian)差(cha)(cha)(cha)(cha)。
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