經(jing)常(chang)有(you)客戶反應不(bu)干膠標(biao)(biao)簽(qian)的膠水的粘性不(bu)夠,標(biao)(biao)簽(qian)有(you)脫落的現象(xiang),其實這些問題都是和溫度有(you)關。在食品(pin)行業最常(chang)見的事情(qing),在常(chang)溫中貼的標(biao)(biao)簽(qian),放(fang)入(ru)凍庫冷藏,拿出(chu)來之(zhi)后(hou)標(biao)(biao)簽(qian)脫落起翹。
我們經常看到(dao)(dao)一種標(biao)簽(qian)的關于溫(wen)(wen)度(du)(du)(du)的描(miao)述是:常溫(wen)(wen)下保持,使用(yong)溫(wen)(wen)度(du)(du)(du)范圍零下50度(du)(du)(du)到(dao)(dao)90度(du)(du)(du),最(zui)低貼標(biao)簽(qian)溫(wen)(wen)度(du)(du)(du)為(wei)7度(du)(du)(du)。里面(mian)分別提到(dao)(dao)了(le)3種溫(wen)(wen)度(du)(du)(du),即存(cun)放(fang)溫(wen)(wen)度(du)(du)(du)、貼標(biao)溫(wen)(wen)度(du)(du)(du)和使用(yong)溫(wen)(wen)度(du)(du)(du)。下面(mian)小達就給大家介紹(shao)一下,溫(wen)(wen)度(du)(du)(du)對標(biao)簽(qian)的影(ying)響有多大。
1、存(cun)(cun)放(fang)(fang)(fang)溫(wen)度(du)。在(zai)(zai)(zai)不干膠(jiao)(jiao)標簽(qian)(qian)工(gong)廠里面,標簽(qian)(qian)的生產(chan)加工(gong)存(cun)(cun)放(fang)(fang)(fang)溫(wen)度(du)是在(zai)(zai)(zai)23度(du)左右(you)(you)(you),相對(dui)濕度(du)在(zai)(zai)(zai)55%左右(you)(you)(you)。所以(yi),用戶購買的標簽(qian)(qian)紙,存(cun)(cun)放(fang)(fang)(fang)的環境溫(wen)度(du)也應(ying)該是23度(du)左右(you)(you)(you)。如(ru)(ru)果(guo)放(fang)(fang)(fang)在(zai)(zai)(zai)室外或(huo)者低溫(wen)環境中,很(hen)容易導致膠(jiao)(jiao)水被凍住,這樣膠(jiao)(jiao)水就沒有粘性(xing)。如(ru)(ru)果(guo)放(fang)(fang)(fang)在(zai)(zai)(zai)溫(wen)度(du)高(gao)、濕度(du)高(gao)的地方,不干膠(jiao)(jiao)標簽(qian)(qian)的熱熔膠(jiao)(jiao)會(hui)溢(yi)出(chu),會(hui)標簽(qian)(qian)的初粘性(xing)下降。所以(yi)正確的存(cun)(cun)放(fang)(fang)(fang)環境很(hen)重要。
2、貼(tie)(tie)標(biao)(biao)(biao)(biao)溫(wen)度(du)。每一種不(bu)干膠標(biao)(biao)(biao)(biao)簽都是有最(zui)(zui)低(di)貼(tie)(tie)標(biao)(biao)(biao)(biao)溫(wen)度(du)的,貼(tie)(tie)標(biao)(biao)(biao)(biao)簽的時(shi)候不(bu)能低(di)于這個(ge)最(zui)(zui)低(di)溫(wen)度(du)。低(di)于這個(ge)最(zui)(zui)低(di)貼(tie)(tie)標(biao)(biao)(biao)(biao)溫(wen)度(du),標(biao)(biao)(biao)(biao)簽就(jiu)會出現貼(tie)(tie)不(bu)牢、起翹(qiao)等問(wen)題。有利于貼(tie)(tie)標(biao)(biao)(biao)(biao)效果的溫(wen)度(du),也是23度(du)左右。
3、使(shi)用(yong)溫度。標(biao)簽貼(tie)好24小時之后(hou),這(zhe)時候標(biao)簽的(de)(de)膠水和被(bei)貼(tie)物的(de)(de)表(biao)面已經充(chong)分結(jie)合。每(mei)一種(zhong)標(biao)簽都(dou)有它的(de)(de)使(shi)用(yong)溫度。比如耐低溫標(biao)簽,可以(yi)在(zai)零下70度到零下196度都(dou)能使(shi)用(yong)。耐高溫標(biao)簽,可以(yi)在(zai)300度的(de)(de)環境(jing)下使(shi)用(yong)。采購適應自己(ji)產品溫度環境(jing)的(de)(de)標(biao)簽,才能達(da)到正確(que)的(de)(de)效果。
有人可能要(yao)(yao)問(wen),要(yao)(yao)是(shi)遇到(dao)這幾(ji)天(tian)突然天(tian)氣降溫(wen)(wen)(wen)了怎么辦?這個時(shi)候(hou),不干膠(jiao)(jiao)標(biao)簽(qian)(qian)(qian)(qian)的(de)(de)膠(jiao)(jiao)水(shui)被凍住了,你需要(yao)(yao)對標(biao)簽(qian)(qian)(qian)(qian)進行處理(li)一下(xia),仍然可以(yi)(yi)(yi)使(shi)(shi)用(yong)。首先(xian),把標(biao)簽(qian)(qian)(qian)(qian)放(fang)(fang)入該標(biao)簽(qian)(qian)(qian)(qian)的(de)(de)最低(di)貼(tie)標(biao)溫(wen)(wen)(wen)度(du)以(yi)(yi)(yi)上(shang)的(de)(de)環境(jing)中(zhong)(zhong),保持24小時(shi),讓(rang)標(biao)簽(qian)(qian)(qian)(qian)自(zi)身的(de)(de)溫(wen)(wen)(wen)度(du)回升,使(shi)(shi)其粘(zhan)(zhan)性恢復。同(tong)(tong)時(shi),被貼(tie)物也(ye)需要(yao)(yao)放(fang)(fang)入該標(biao)簽(qian)(qian)(qian)(qian)的(de)(de)貼(tie)標(biao)溫(wen)(wen)(wen)度(du)的(de)(de)環境(jing)中(zhong)(zhong),保持12小時(shi)以(yi)(yi)(yi)上(shang)。簡單點說(shuo),就是(shi)要(yao)(yao)使(shi)(shi)標(biao)簽(qian)(qian)(qian)(qian)和被貼(tie)物,都同(tong)(tong)時(shi)達(da)到(dao)標(biao)簽(qian)(qian)(qian)(qian)的(de)(de)最低(di)貼(tie)標(biao)溫(wen)(wen)(wen)度(du)以(yi)(yi)(yi)上(shang),這樣就可以(yi)(yi)(yi)使(shi)(shi)用(yong)了。貼(tie)好了之(zhi)后,不能立即拿(na)到(dao)溫(wen)(wen)(wen)差較大的(de)(de)環境(jing)中(zhong)(zhong)去,需要(yao)(yao)保持24小時(shi),使(shi)(shi)膠(jiao)(jiao)水(shui)的(de)(de)粘(zhan)(zhan)性達(da)到(dao)正常值(zhi)。薄膜類(lei)標(biao)簽(qian)(qian)(qian)(qian)很容易因溫(wen)(wen)(wen)度(du)變化熱脹冷縮,紙類(lei)標(biao)簽(qian)(qian)(qian)(qian)也(ye)容易出現纖維受潮變形。
那要(yao)是標簽存放的空間(jian),溫度(du)升高,膠水(shui)溢(yi)出了,標簽還能使用嗎?這樣的情(qing)況,小達建議你還是報廢,另外(wai)重新采購。畢(bi)竟溫度(du)過高,膠水(shui)已經(jing)溢(yi)出,沒辦法再(zai)把(ba)膠水(shui)弄回去。