一、熱敏紙是什么紙
熱敏紙又被稱為熱(re)(re)(re)(re)敏傳真紙(zhi)、熱(re)(re)(re)(re)敏記錄紙(zhi)、熱(re)(re)(re)(re)敏復印紙(zhi),在(zai)臺(tai)灣則叫做感(gan)熱(re)(re)(re)(re)復寫紙(zhi)。熱(re)(re)(re)(re)敏紙(zhi)是(shi)(shi)一(yi)種(zhong)(zhong)加工(gong)紙(zhi),其(qi)制造(zao)原理(li)就是(shi)(shi)在(zai)優(you)質的(de)(de)原紙(zhi)上涂布一(yi)層“熱(re)(re)(re)(re)敏涂料(liao)”(熱(re)(re)(re)(re)敏變色層)。雖然此(ci)變色層所用(yong)(yong)的(de)(de)化學藥品(pin)有(you)十幾種(zhong)(zhong),但至少有(you)下列化合物(wu):無色染(ran)(ran)料(liao),該染(ran)(ran)料(liao)的(de)(de)品(pin)種(zhong)(zhong)甚廣,最常用(yong)(yong)的(de)(de)是(shi)(shi)熒光化合物(wu);顯色劑(ji)(ji)約(yue)占20%以(yi)下,常用(yong)(yong)的(de)(de)有(you)雙酚、對羥基苯(ben)甲酸(suan)(suan);增感(gan)劑(ji)(ji)約(yue)占10%以(yi)下,其(qi)中含有(you)苯(ben)磺酸(suan)(suan)酰(xian)胺類(lei)化合物(wu);填料(liao)約(yue)占50%以(yi)下,常用(yong)(yong)的(de)(de)有(you)碳酸(suan)(suan)鈣(微粒);膠黏(nian)劑(ji)(ji)約(yue)占10%以(yi)下,如(ru)聚乙酸(suan)(suan)乙烯(xi);穩定劑(ji)(ji),如(ru)對酞(tai)酸(suan)(suan)二(er)苯(ben)酰(xian);潤滑劑(ji)(ji)等。因此(ci)工(gong)藝難度(du)大,技術要求高。
熱敏紙(zhi)(zhi)在傳真(zhen)(zhen)機上(shang)作為(wei)文字和圖形(xing)的(de)通訊載體,即當成傳真(zhen)(zhen)紙(zhi)(zhi);在醫療、測(ce)計系統中作為(wei)記錄(lu)材料,如心電圖紙(zhi)(zhi)、熱工儀器記錄(lu)紙(zhi)(zhi)等;應用(yong)于因(yin)特網終端的(de)打印紙(zhi)(zhi);在商業活(huo)動(dong)方(fang)面,用(yong)來制(zhi)作商標(biao)、簽碼(POS)等等,其(qi)中以傳真(zhen)(zhen)紙(zhi)(zhi)的(de)用(yong)量占(zhan)有的(de)比例最大(da)。
二、熱敏紙和不干膠紙有什么不一樣
熱(re)敏紙和其他的不(bu)(bu)干膠紙重點在(zai)于(yu)印刷方式不(bu)(bu)同,熱(re)敏紙采用(yong)熱(re)敏涂(tu)層,不(bu)(bu)用(yong)碳帶(dai)印刷,(但存(cun)儲時(shi)間(jian)更短(duan))。其他普通的不(bu)(bu)干膠紙,全(quan)部使用(yong)碳帶(dai)打印或者噴墨打印(存(cun)放(fang)時(shi)間(jian)長)。
熱敏紙是一種特殊的涂布加工紙,其外觀與普通白紙相似.熱敏紙表層光滑,是由普通紙張作為紙基,上面涂布一層熱敏發色層,都涂在普通紙張表面的一面,發色層是由膠粘劑、顯色劑、無色染料(或稱隱色染料)組成,沒有通過微膠囊予以隔開,化學反應處于“潛伏”狀態。當熱敏紙遇到發熱的打印頭時,打印頭所打印之處的顯色劑與無色染料即發生化學反應而變色,形成圖文。熱敏紙被置于70℃以(yi)上環境時(shi),熱敏涂(tu)層就會開始(shi)變色。
我(wo)們來看看其他(ta)不(bu)(bu)干膠(jiao)紙(zhi)(zhi)(zhi)(zhi),以銅(tong)版(ban)(ban)(ban)紙(zhi)(zhi)(zhi)(zhi)為(wei)例,銅(tong)版(ban)(ban)(ban)紙(zhi)(zhi)(zhi)(zhi)的生產工(gong)藝相對比較簡單,它是(shi)在(zai)一張(zhang)原(yuan)紙(zhi)(zhi)(zhi)(zhi)張(zhang)的表(biao)面(mian)涂(tu)抹(mo)一層白色涂(tu)料(liao),經過超級壓光(guang)工(gong)藝加(jia)工(gong)而成。按(an)照(zhao)涂(tu)抹(mo)涂(tu)料(liao)的多少(shao)來劃分(fen),銅(tong)版(ban)(ban)(ban)紙(zhi)(zhi)(zhi)(zhi)可以分(fen)成單面(mian)銅(tong)版(ban)(ban)(ban)紙(zhi)(zhi)(zhi)(zhi)、雙(shuang)面(mian)銅(tong)版(ban)(ban)(ban)紙(zhi)(zhi)(zhi)(zhi)兩大(da)種類;而按(an)照(zhao)紙(zhi)(zhi)(zhi)(zhi)張(zhang)的紙(zhi)(zhi)(zhi)(zhi)面(mian)不(bu)(bu)同來區分(fen),銅(tong)版(ban)(ban)(ban)紙(zhi)(zhi)(zhi)(zhi)可以分(fen)為(wei)無光(guang)澤銅(tong)版(ban)(ban)(ban)紙(zhi)(zhi)(zhi)(zhi)、布紋銅(tong)版(ban)(ban)(ban)紙(zhi)(zhi)(zhi)(zhi)兩大(da)種類。