主要毒(du)性物質(zhi)(zhi)：苯(ben)被公認(ren)為致癌物質(zhi)(zhi)，但苯(ben)類(lei)是(shi)樹脂(zhi)(zhi)材(cai)(cai)料(liao)(liao)的良好溶(rong)劑(ji)，它具有(you)溶(rong)解性強(qiang)，揮發速度(du)快，價(jia)格便宜等(deng)優點(dian)，因此被廣(guang)泛用于樹脂(zhi)(zhi)的溶(rong)劑(ji)。在(zai)包(bao)(bao)裝中(zhong)(zhong)主要用于復合(he)包(bao)(bao)裝材(cai)(cai)料(liao)(liao)粘(zhan)和(he)劑(ji)和(he)塑料(liao)(liao)印刷油墨(mo)的溶(rong)劑(ji)。由于在(zai)復合(he)材(cai)(cai)料(liao)(liao)和(he)塑料(liao)(liao)印刷過(guo)(guo)程中(zhong)(zhong)苯(ben)類(lei)溶(rong)劑(ji)揮發不完全，包(bao)(bao)裝材(cai)(cai)料(liao)(liao)或(huo)容器生(sheng)產設(she)備比較簡(jian)陋時(shi)有(you)可能造成苯(ben)類(lei)物質(zhi)(zhi)在(zai)包(bao)(bao)裝材(cai)(cai)料(liao)(liao)中(zhong)(zhong)殘留。食品包(bao)(bao)裝設(she)計過(guo)(guo)程中(zhong)(zhong)苯(ben)類(lei)物質(zhi)(zhi)滲透到食品中(zhong)(zhong)，會導致食品中(zhong)(zhong)含有(you)苯(ben)。