主(zhu)(zhu)要毒性物質(zhi)(zhi)：苯被公認(ren)為致癌物質(zhi)(zhi)，但苯類是樹脂材(cai)(cai)料(liao)的(de)(de)良好溶(rong)劑，它具有溶(rong)解性強，揮發速度(du)快，價格便宜(yi)等優(you)點，因此被廣泛用于樹脂的(de)(de)溶(rong)劑。在包(bao)裝中(zhong)(zhong)(zhong)主(zhu)(zhu)要用于復(fu)合(he)包(bao)裝材(cai)(cai)料(liao)粘(zhan)和劑和塑料(liao)印(yin)刷(shua)油墨的(de)(de)溶(rong)劑。由(you)于在復(fu)合(he)材(cai)(cai)料(liao)和塑料(liao)印(yin)刷(shua)過(guo)程中(zhong)(zhong)(zhong)苯類溶(rong)劑揮發不完全，包(bao)裝材(cai)(cai)料(liao)或容器生產設備(bei)比(bi)較簡(jian)陋時有可能(neng)造成(cheng)苯類物質(zhi)(zhi)在包(bao)裝材(cai)(cai)料(liao)中(zhong)(zhong)(zhong)殘(can)留。食品(pin)包(bao)裝設計(ji)過(guo)程中(zhong)(zhong)(zhong)苯類物質(zhi)(zhi)滲透到食品(pin)中(zhong)(zhong)(zhong)，會導致食品(pin)中(zhong)(zhong)(zhong)含有苯。