? ? ? ?

? ? ? ?EB固(gu)(gu)(gu)(gu)化(hua)(hua)(hua)是以電(dian)(dian)(dian)(dian)子(zi)(zi)束為輻射(she)源(yuan)，誘導特殊配置的(de)(de)100%固(gu)(gu)(gu)(gu)含的(de)(de)材料(liao)（如EB涂料(liao)、EB油墨(mo)等）快速(su)轉(zhuan)變(bian)為固(gu)(gu)(gu)(gu)體的(de)(de)過程。EB固(gu)(gu)(gu)(gu)化(hua)(hua)(hua)采(cai)用(yong)電(dian)(dian)(dian)(dian)子(zi)(zi)加(jia)(jia)速(su)器作(zuo)為能(neng)(neng)量(liang)源(yuan)輻照有機材料(liao)，使其產生自由基、活性(xing)陽離子(zi)(zi)或陰離子(zi)(zi)等活性(xing)種(zhong)，導致材料(liao)迅速(su)聚合交聯固(gu)(gu)(gu)(gu)化(hua)(hua)(hua)的(de)(de)過程。電(dian)(dian)(dian)(dian)子(zi)(zi)束設備按照其加(jia)(jia)速(su)電(dian)(dian)(dian)(dian)場(chang)強弱，即加(jia)(jia)速(su)獲得的(de)(de)射(she)出電(dian)(dian)(dian)(dian)子(zi)(zi)能(neng)(neng)量(liang)大(da)小，可分為高(gao)能(neng)(neng)電(dian)(dian)(dian)(dian)子(zi)(zi)束(5-10MeV)、中(zhong)能(neng)(neng)電(dian)(dian)(dian)(dian)子(zi)(zi)束（300keV~5MeV）和低(di)能(neng)(neng)電(dian)(dian)(dian)(dian)子(zi)(zi)束(80-300keV )。EB固(gu)(gu)(gu)(gu)化(hua)(hua)(hua)通常采(cai)用(yong)低(di)能(neng)(neng)電(dian)(dian)(dian)(dian)子(zi)(zi)加(jia)(jia)速(su)器對(dui)涂層、油墨(mo)、膠粘劑進行輻照固(gu)(gu)(gu)(gu)化(hua)(hua)(hua)加(jia)(jia)工的(de)(de)技術，高(gao)能(neng)(neng)與中(zhong)能(neng)(neng)電(dian)(dian)(dian)(dian)子(zi)(zi)加(jia)(jia)速(su)器不適用(yong)于薄層固(gu)(gu)(gu)(gu)化(hua)(hua)(hua)。

? ? ? ?相比UV固(gu)(gu)化(hua)(hua)、溶劑型(xing)固(gu)(gu)化(hua)(hua)，EB固(gu)(gu)化(hua)(hua)成膜(mo)更為徹底，涂層(ceng)強度更有保(bao)障；且配方不使用光引發劑、固(gu)(gu)化(hua)(hua)涂層(ceng)內原(yuan)料殘留少(shao)，保(bao)證了(le)涂裝層(ceng)的純凈性，可大(da)大(da)提(ti)高了(le)涂層(ceng)戶外(wai)使用的耐候性，具(ju)有更加可靠的使用性能(neng)。最近(jin)十多年(nian)，EB固(gu)(gu)化(hua)(hua)技術逐漸(jian)向(xiang)民用擴(kuo)展，主要在衛(wei)(wei)生(sheng)安(an)全油墨印刷(shua)、衛(wei)(wei)生(sheng)用品PSA與離型(xing)紙制造、清潔安(an)全涂裝(如室內裝修墻紙涂裝)、車內仿皮(pi)涂層(ceng)固(gu)(gu)化(hua)(hua)、室內裝修墻布涂層(ceng)、醫療用品涂層(ceng)等。

? ? ? ?EB固(gu)化(hua)與(yu)(yu)UV固(gu)化(hua)區別。EB固(gu)化(hua)與(yu)(yu)UV固(gu)化(hua)區別不僅僅在于后者需要光(guang)引發劑：UV固(gu)化(hua)是(shi)(shi)由(you)光(guang)引發劑分(fen)解產(chan)(chan)(chan)生自(zi)由(you)基(ji)并引發聚(ju)合，涂層的最終性質(zhi)取決于樹(shu)(shu)脂(zhi)的官能(neng)度，固(gu)化(hua)體系中(zhong)所有(you)新鍵(jian)的產(chan)(chan)(chan)生都(dou)是(shi)(shi)通過(guo)樹(shu)(shu)脂(zhi)的官能(neng)團(tuan)以(yi)及聚(ju)合過(guo)程(cheng)結束(shu)時由(you)鏈中(zhong)止(zhi)反應產(chan)(chan)(chan)生的一些交(jiao)聯；而EB固(gu)化(hua)是(shi)(shi)在利用(yong)高能(neng)量(liang)的電子(zi)束(shu)轟(hong)擊體系中(zhong)的低分(fen)子(zi)量(liang)的預聚(ju)物，隨機產(chan)(chan)(chan)生自(zi)由(you)基(ji)活性點(dian)。這樣不僅存(cun)在樹(shu)(shu)脂(zhi)中(zhong)的雙鍵(jian)聚(ju)合，自(zi)由(you)基(ji)之間(jian)也能(neng)發生交(jiao)聯或者與(yu)(yu)樹(shu)(shu)脂(zhi)進行交(jiao)聯。

? ? ? ?EB固化的優缺點。

? ? ? EB固化(hua)(hua)(hua)更環保、更高效(xiao)。EB固化(hua)(hua)(hua)可降低二氧化(hua)(hua)(hua)碳和(he)VOC的(de)排放；EB油墨在(zai)電子束(shu)作用(yong)(yong)下發生鏈增長反應(ying)，涂(tu)層固化(hua)(hua)(hua)時間短(duan)(duan)，比UV固化(hua)(hua)(hua)速度快很多，而且對于(yu)較厚(hou)的(de)墨層也能徹底的(de)固化(hua)(hua)(hua)。而且EB固化(hua)(hua)(hua)能夠用(yong)(yong)于(yu)膜(mo)復膜(mo)的(de)加工，不需要經過熟化(hua)(hua)(hua)處(chu)理，可縮短(duan)(duan)交期。EB固化(hua)(hua)(hua)屬于(yu)冷固化(hua)(hua)(hua)，不會(hui)導致印刷(shua)基材受(shou)熱(re)變形，因此可以對熱(re)收縮膜(mo)、感熱(re)紙等進行涂(tu)布、印刷(shua)加工。

? ? ? ?但EB電(dian)子束(shu)易與(yu)空氣(qi)中的氧氣(qi)反應，產生臭氧，會降低其能量(liang)，因(yin)此在(zai)使用(yong)過(guo)程中必須將EB裝(zhuang)置(zhi)置(zhi)于惰性氣(qi)體氛(fen)圍中。