主要(yao)毒(du)性物(wu)質(zhi)(zhi)：苯(ben)被(bei)公(gong)認為致(zhi)癌物(wu)質(zhi)(zhi)，但苯(ben)類是樹脂材料的良好溶(rong)(rong)(rong)劑(ji)，它具有(you)溶(rong)(rong)(rong)解性強，揮發速度(du)快，價格(ge)便宜等(deng)優(you)點，因此(ci)被(bei)廣泛用于(yu)(yu)樹脂的溶(rong)(rong)(rong)劑(ji)。在(zai)包(bao)裝中主要(yao)用于(yu)(yu)復合包(bao)裝材料粘和(he)(he)劑(ji)和(he)(he)塑料印刷(shua)(shua)油(you)墨的溶(rong)(rong)(rong)劑(ji)。由于(yu)(yu)在(zai)復合材料和(he)(he)塑料印刷(shua)(shua)過(guo)(guo)程中苯(ben)類溶(rong)(rong)(rong)劑(ji)揮發不完全，包(bao)裝材料或容器生(sheng)產(chan)設(she)備比較簡陋(lou)時有(you)可能(neng)造(zao)成苯(ben)類物(wu)質(zhi)(zhi)在(zai)包(bao)裝材料中殘(can)留。食(shi)品包(bao)裝設(she)計過(guo)(guo)程中苯(ben)類物(wu)質(zhi)(zhi)滲透(tou)到食(shi)品中，會(hui)導致(zhi)食(shi)品中含有(you)苯(ben)。