主(zhu)(zhu)要(yao)毒性(xing)物(wu)(wu)質：苯被公認為致(zhi)癌物(wu)(wu)質，但苯類是樹(shu)脂(zhi)材(cai)料(liao)(liao)(liao)(liao)的(de)良好溶(rong)劑(ji)，它具有(you)溶(rong)解性(xing)強(qiang)，揮發速度快(kuai)，價格便宜(yi)等優(you)點(dian)，因此被廣(guang)泛用(yong)(yong)于(yu)(yu)樹(shu)脂(zhi)的(de)溶(rong)劑(ji)。在包(bao)(bao)裝(zhuang)中(zhong)主(zhu)(zhu)要(yao)用(yong)(yong)于(yu)(yu)復(fu)合(he)包(bao)(bao)裝(zhuang)材(cai)料(liao)(liao)(liao)(liao)粘和劑(ji)和塑料(liao)(liao)(liao)(liao)印刷油墨(mo)的(de)溶(rong)劑(ji)。由于(yu)(yu)在復(fu)合(he)材(cai)料(liao)(liao)(liao)(liao)和塑料(liao)(liao)(liao)(liao)印刷過(guo)程中(zhong)苯類溶(rong)劑(ji)揮發不(bu)完全，包(bao)(bao)裝(zhuang)材(cai)料(liao)(liao)(liao)(liao)或(huo)容器生產(chan)設備比(bi)較(jiao)簡(jian)陋時有(you)可能(neng)造成苯類物(wu)(wu)質在包(bao)(bao)裝(zhuang)材(cai)料(liao)(liao)(liao)(liao)中(zhong)殘(can)留。食品(pin)包(bao)(bao)裝(zhuang)設計(ji)過(guo)程中(zhong)苯類物(wu)(wu)質滲透到食品(pin)中(zhong)，會導致(zhi)食品(pin)中(zhong)含有(you)苯。