主要毒性(xing)物(wu)(wu)質(zhi)(zhi)(zhi)：苯被公認為(wei)致癌(ai)物(wu)(wu)質(zhi)(zhi)(zhi)，但苯類是樹(shu)脂材料(liao)的(de)良好溶(rong)(rong)劑(ji)(ji)(ji)，它具有(you)(you)溶(rong)(rong)解性(xing)強，揮發速度快，價格便(bian)宜等優點，因此被廣泛用于樹(shu)脂的(de)溶(rong)(rong)劑(ji)(ji)(ji)。在(zai)包(bao)裝中(zhong)(zhong)主要用于復合(he)包(bao)裝材料(liao)粘和劑(ji)(ji)(ji)和塑料(liao)印刷油墨(mo)的(de)溶(rong)(rong)劑(ji)(ji)(ji)。由于在(zai)復合(he)材料(liao)和塑料(liao)印刷過程中(zhong)(zhong)苯類溶(rong)(rong)劑(ji)(ji)(ji)揮發不完全，包(bao)裝材料(liao)或容器生產設備比(bi)較簡陋時有(you)(you)可(ke)能造成苯類物(wu)(wu)質(zhi)(zhi)(zhi)在(zai)包(bao)裝材料(liao)中(zhong)(zhong)殘留。食(shi)品(pin)包(bao)裝設計過程中(zhong)(zhong)苯類物(wu)(wu)質(zhi)(zhi)(zhi)滲透(tou)到食(shi)品(pin)中(zhong)(zhong)，會導致食(shi)品(pin)中(zhong)(zhong)含有(you)(you)苯。