一、熱敏紙是什么紙
熱敏紙又被(bei)稱為(wei)熱敏傳真(zhen)紙(zhi)、熱敏記錄紙(zhi)、熱敏復(fu)印(yin)紙(zhi),在臺灣(wan)則(ze)叫做感熱復(fu)寫(xie)紙(zhi)。熱敏紙(zhi)是一種加工紙(zhi),其(qi)制(zhi)造(zao)原理就是在優質的(de)原紙(zhi)上涂(tu)布(bu)一層“熱敏涂(tu)料(liao)”(熱敏變色(se)層)。雖(sui)然此變色(se)層所用(yong)(yong)的(de)化(hua)(hua)學藥品有(you)十幾種,但至少(shao)有(you)下(xia)列化(hua)(hua)合物:無色(se)染料(liao),該染料(liao)的(de)品種甚廣(guang),最常(chang)用(yong)(yong)的(de)是熒光化(hua)(hua)合物;顯色(se)劑(ji)(ji)約占(zhan)20%以下(xia),常(chang)用(yong)(yong)的(de)有(you)雙酚、對(dui)羥基(ji)苯(ben)甲酸(suan);增感劑(ji)(ji)約占(zhan)10%以下(xia),其(qi)中含有(you)苯(ben)磺(huang)酸(suan)酰(xian)胺類(lei)化(hua)(hua)合物;填(tian)料(liao)約占(zhan)50%以下(xia),常(chang)用(yong)(yong)的(de)有(you)碳酸(suan)鈣(微粒(li));膠黏(nian)劑(ji)(ji)約占(zhan)10%以下(xia),如聚乙酸(suan)乙烯;穩定劑(ji)(ji),如對(dui)酞酸(suan)二苯(ben)酰(xian);潤滑劑(ji)(ji)等。因(yin)此工藝難(nan)度大,技術(shu)要求高。
熱(re)敏紙(zhi)(zhi)在傳真(zhen)機(ji)上(shang)作(zuo)為(wei)(wei)文(wen)字和圖(tu)形的(de)(de)通訊載體(ti),即當成傳真(zhen)紙(zhi)(zhi);在醫(yi)療、測計系統中作(zuo)為(wei)(wei)記錄材料,如(ru)心電(dian)圖(tu)紙(zhi)(zhi)、熱(re)工儀(yi)器記錄紙(zhi)(zhi)等;應用(yong)(yong)于(yu)因特(te)網終(zhong)端的(de)(de)打(da)印紙(zhi)(zhi);在商業活動方面,用(yong)(yong)來制(zhi)作(zuo)商標、簽碼(POS)等等,其(qi)中以傳真(zhen)紙(zhi)(zhi)的(de)(de)用(yong)(yong)量占有的(de)(de)比例(li)最(zui)大。
二、熱敏紙和不干膠紙有什么不一樣
熱敏紙和其(qi)他(ta)的不干(gan)膠紙重點在(zai)于印(yin)刷(shua)方式不同,熱敏紙采用(yong)熱敏涂層,不用(yong)碳帶印(yin)刷(shua),(但存(cun)儲時間更短)。其(qi)他(ta)普通的不干(gan)膠紙,全(quan)部(bu)使用(yong)碳帶打印(yin)或者噴(pen)墨打印(yin)(存(cun)放時間長)。
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(yu)70℃以(yi)上(shang)環境時,熱敏涂(tu)層就會開始變(bian)色。
我們來(lai)看看其他(ta)不干膠紙(zhi)(zhi)(zhi),以銅(tong)(tong)(tong)(tong)版(ban)(ban)紙(zhi)(zhi)(zhi)為例,銅(tong)(tong)(tong)(tong)版(ban)(ban)紙(zhi)(zhi)(zhi)的(de)(de)生產工(gong)(gong)藝相對比(bi)較簡(jian)單,它是在(zai)一(yi)張原(yuan)紙(zhi)(zhi)(zhi)張的(de)(de)表(biao)面(mian)涂(tu)抹一(yi)層白色(se)涂(tu)料(liao),經過超級(ji)壓光工(gong)(gong)藝加工(gong)(gong)而(er)(er)成。按照涂(tu)抹涂(tu)料(liao)的(de)(de)多少來(lai)劃分(fen)(fen),銅(tong)(tong)(tong)(tong)版(ban)(ban)紙(zhi)(zhi)(zhi)可(ke)(ke)以分(fen)(fen)成單面(mian)銅(tong)(tong)(tong)(tong)版(ban)(ban)紙(zhi)(zhi)(zhi)、雙面(mian)銅(tong)(tong)(tong)(tong)版(ban)(ban)紙(zhi)(zhi)(zhi)兩(liang)大(da)(da)種類(lei);而(er)(er)按照紙(zhi)(zhi)(zhi)張的(de)(de)紙(zhi)(zhi)(zhi)面(mian)不同來(lai)區分(fen)(fen),銅(tong)(tong)(tong)(tong)版(ban)(ban)紙(zhi)(zhi)(zhi)可(ke)(ke)以分(fen)(fen)為無光澤(ze)銅(tong)(tong)(tong)(tong)版(ban)(ban)紙(zhi)(zhi)(zhi)、布(bu)紋銅(tong)(tong)(tong)(tong)版(ban)(ban)紙(zhi)(zhi)(zhi)兩(liang)大(da)(da)種類(lei)。