膠印油墨的成分和分類
jiaoyinyoumoyinshuadeshizhi,conggongyidejiaodukan,shijiaoyinyoumoxiangchengyinwushangdezhuanyi。yaoshijiaoyinyoumoshunlidizhuanyiyaoqiutaxuyaojubeishiyiyinshuadezuoyeshixing,jiyinshuashixing。zhexiezhuyaozaiyinshuaguochengzhongcaibiaoxianchulaideyoumotexing,zhuruzhanzhixing、觸變性、粘著性、拉絲性、幹(gan)燥(zao)性(xing)等(deng),是(shi)這(zhe)裏(li)要(yao)講(jiang)述(shu)的(de)主(zhu)要(yao)內(nei)容(rong)。另(ling)方(fang)麵(mian),從(cong)印(yin)品(pin)質(zhi)量(liang)評(ping)定(ding)的(de)角(jiao)度(du)看(kan),還(hai)要(yao)求(qiu)膠(jiao)印(yin)油(you)墨(mo)本(ben)身(shen)需(xu)要(yao)具(ju)備(bei)某(mou)些(xie)固(gu)有(you)的(de)性(xing)能(neng)。這(zhe)些(xie)膠(jiao)印(yin)油(you)墨(mo)本(ben)身(shen)固(gu)有(you)的(de)性(xing)能(neng),諸(zhu)如(ru)著(zhe)色(se)力(li)、遮蓋力、光澤性、耐曬性、耐酸堿性等,又都與膠印油墨的結構、成分和製造過程等有關。而且,膠印油墨的結構、成分還在一定的程度上影響到膠印油墨的印刷適性。
jiaoyinyoumoshiyizhongwendingdejiaotifensantixi,tadezhuyaochengfen,jijiaoyinyoumodezhuji,shiyouzuoweifensanxiangdeyanliaohezuoweilianxuxiangdelianjieliaosuozucheng。zhujizhongdeyanliaofuyujiaoyinyoumoyiyanse;主劑中的連結料供膠印油墨具有必要的轉移性能。顏料粒子是上千萬個分子聚集起來的顆粒,呈球、棒、片等不規則的形態,但在宏觀上卻是十分微小的,一般顏料粒子的大小在幾十到幾百nm的範圍之內。連結料是各類樹脂、ganxingzhiwuyouherongjipeizhichengdezhanchouzhuangdeyetaiwuzhi,benshenshiyizhongrongjiao,juyouzhanbuhexiezaifensanxianglizidezuoyong。youzheyangdefensanxianglizifensanzaizheyangdelianjieliaorongjiaozhong,dedaodejiaotifensantixijuyoujiaohaodewendingxing,pingjiedejiushiliangxiangjiemiandemouxieteshuxingzhi。
jiaotihuaxuezhongbagutifensanxiangdezongbiaomianjixiangzongtijizhibijiaozuogutifensanxiangdebibiaomianji。youyuyanliaolizifeichangxixiao,tadebibiaomianjizhixiangdangdade,liru,tanheilizidezhijingyuewei0.1nm,每立方厘米油墨中若含有1015個炭黑粒子,則作為膠印油墨中分散相的炭黑粒子的比表麵積,可以達到6×2625px-1。這zhe樣yang大da的de分fen散san相xiang的de比bi表biao麵mian積ji,在zai通tong常chang情qing況kuang下xia的de膠jiao體ti分fen散san體ti係xi中zhong,分fen散san相xiang粒li子zi會hui具ju有you很hen大da的de比bi表biao麵mian自zi由you能neng,體ti係xi在zai熱re力li平ping衡heng上shang也ye將jiang是shi不bu穩wen定ding的de,宏hong觀guan的de表biao現xian就jiu是shi分fen散san相xiang粒li子zi的de凝ning聚ju和he沉chen降jiang。然ran而er膠jiao印yin油you墨mo在zai正zheng常chang的de情qing況kuang下xia並bing沒mei有you這zhe樣yang的de現xian象xiang發fa生sheng,原yuan因yin是shi膠jiao印yin油you墨mo中zhong的de顏yan料liao粒li子zi有you個ge保bao護hu性xing的de外wai殼ke。膠jiao印yin亮liang光guang油you墨mo中zhong總zong是shi存cun在zai部bu分fen高gao級ji遊you離li脂zhi肪fang酸suan,醇chun類lei等deng表biao麵mian活huo性xing劑ji,這zhe些xie表biao麵mian活huo性xing劑ji定ding向xiang地di排pai列lie在zai顏yan料liao粒li子zi的de周zhou圍wei,形xing成cheng一yi個ge牢lao固gu的de外wai殼ke;這個外殼使顏料粒子表麵由高能狀態轉為低能狀態,從而使體係趨於穩定,膠印油墨通常就不會有顏料粒子凝聚而沉降的現象發生。
微(wei)細(xi)而(er)堅(jian)硬(ying)的(de)固(gu)態(tai)顏(yan)料(liao)粒(li)子(zi),外(wai)麵(mian)包(bao)裹(guo)著(zhe)一(yi)層(ceng)由(you)表(biao)麵(mian)活(huo)性(xing)劑(ji)構(gou)成(cheng)的(de)牢(lao)固(gu)而(er)較(jiao)軟(ruan)的(de)外(wai)殼(ke),穩(wen)定(ding)地(di)懸(xuan)浮(fu)在(zai)粘(zhan)稠(chou)液(ye)態(tai)的(de)連(lian)結(jie)料(liao)中(zhong),形(xing)成(cheng)一(yi)個(ge)穩(wen)定(ding)的(de)膠(jiao)體(ti)分(fen)散(san)體(ti)係(xi),這(zhe)就(jiu)是(shi)膠(jiao)印(yin)油(you)墨(mo)的(de)理(li)想(xiang)化(hua)的(de)結(jie)構(gou)模(mo)型(xing)。由(you)於(yu)液(ye)態(tai)的(de)連(lian)接(jie)料(liao)充(chong)塞(sai)在(zai)固(gu)態(tai)的(de)顏(yan)料(liao)粒(li)子(zi)之(zhi)間(jian),在(zai)印(yin)刷(shua)過(guo)程(cheng)中(zhong),膠(jiao)印(yin)油(you)墨(mo)中(zhong)液(ye)體(ti)介(jie)質(zhi)的(de)內(nei)摩(mo)擦(ca)便(bian)代(dai)替(ti)了(le)固(gu)體(ti)粒(li)子(zi)間(jian)的(de)碰(peng)撞(zhuang),這(zhe)是(shi)膠(jiao)印(yin)油(you)墨(mo)具(ju)有(you)良(liang)好(hao)的(de)流(liu)動(dong)和(he)轉(zhuan)移(yi)性(xing)能(neng)的(de)原(yuan)因(yin)。
連結料是顏料的載體,在印刷過程中,它攜帶著顏料粒子從印刷機的墨鬥經墨輥輾轉轉移到承印物表麵而形成墨膜,固著、幹燥並粘結在承印物上。而承印物上墨膜的顏色則取決於顏料的顏色。
在顏料粒子的結構中,含有一定的發色團。有機顏料的發色團通常是不飽和原子和雙鍵,如:羰基 〉C=O、偶氮基—N=N—、亞硝基—N=O、硝基—NO2等;無機顏料的發色團通常是一些離子,如:鉻酸根離子CrO42-、硫離子S-2、鐵離子Fe3+、銅離子Cu2+等。這些發色團使得顏料粒子對光波的吸收具有選擇性, jizhinengxishoukejianguangzhongyidingbochangdeguangbo,yineryejiushiyanliaolizichengxianchubutongdeyanse。jiaoyinyoumozhongdeyanliaolizishiwendingdixuanfuzailianjieliaozhongde,zhaoshedaomomoshangdekejianguang,yibufenbeimomobiaomiansuofanshe,yibufenjingzheshejinrumomo。jinrumomodeguangbo,yibufenbeiyanliaokelisuoxishou,qiyujiaofenzebeifanshedaomomowai。zhebufenbeifanshedeguangbo,jiushirenyankanmomoshisejiaodelaiyuan。yinci,guangbozaimomoneichuantouyueshen,yudaodeyanliaoliziyueduo,congmomoneifanshechulaideguangboliangbianyueda。
顏yan料liao和he連lian緒xu料liao是shi膠jiao印yin油you墨mo的de主zhu劑ji,但dan是shi單dan單dan由you顏yan料liao和he連lian結jie料liao所suo配pei製zhi成cheng的de膠jiao印yin油you墨mo,並bing不bu能neng滿man足zu印yin刷shua工gong藝yi對dui膠jiao印yin油you墨mo提ti出chu的de多duo樣yang而er嚴yan格ge的de要yao求qiu。所suo以yi膠jiao印yin油you墨mo的de成cheng分fen裏li總zong少shao不bu了le這zhe樣yang那na樣yang的de添tian加jia劑ji,用yong以yi改gai善shan膠jiao印yin油you墨mo的de性xing能neng,調tiao節jie膠jiao印yin油you墨mo的de印yin刷shua適shi性xing。添tian加jia劑ji作zuo為wei助zhu劑ji,是shi膠jiao印yin油you墨mo的de輔fu助zhu成cheng分fen,但dan它ta的de作zuo用yong還hai是shi十shi分fen重zhong要yao的de。助zhu劑ji的de理li化hua性xing質zhi自zi然ran不bu能neng與yu主zhu劑ji的de相xiang悖bei,而er且qie要yao能neng與yu主zhu劑ji溶rong和he成cheng一yi體ti。
膠(jiao)印(yin)油(you)墨(mo)的(de)配(pei)製(zhi)工(gong)藝(yi)較(jiao)複(fu)雜(za)。一(yi)般(ban)是(shi)將(jiang)顏(yan)料(liao),連(lian)結(jie)料(liao)以(yi)及(ji)各(ge)種(zhong)添(tian)加(jia)料(liao),按(an)一(yi)定(ding)的(de)比(bi)例(li)在(zai)調(tiao)墨(mo)機(ji)中(zhong)混(hun)合(he)成(cheng)均(jun)勻(yun)的(de)油(you)狀(zhuang)膏(gao)劑(ji),再(zai)在(zai)輥(gun)式(shi)研(yan)磨(mo)機(ji)或(huo)球(qiu)磨(mo)機(ji)中(zhong)反(fan)複(fu)碾(nian)磨(mo)製(zhi)成(cheng)的(de)。



2021-12-31
瀏覽次數:1521 次
返回列表
