主要毒(du)性物質(zhi)：苯(ben)被公認(ren)為致(zhi)癌物質(zhi)，但苯(ben)類(lei)(lei)是樹(shu)(shu)脂材料(liao)(liao)(liao)的良好溶(rong)(rong)(rong)劑(ji)(ji)，它(ta)具有(you)溶(rong)(rong)(rong)解(jie)性強，揮發速度快，價格(ge)便宜等優(you)點，因此被廣泛用(yong)(yong)于樹(shu)(shu)脂的溶(rong)(rong)(rong)劑(ji)(ji)。在(zai)包(bao)裝(zhuang)(zhuang)中(zhong)主要用(yong)(yong)于復合包(bao)裝(zhuang)(zhuang)材料(liao)(liao)(liao)粘和劑(ji)(ji)和塑(su)料(liao)(liao)(liao)印(yin)刷油墨的溶(rong)(rong)(rong)劑(ji)(ji)。由于在(zai)復合材料(liao)(liao)(liao)和塑(su)料(liao)(liao)(liao)印(yin)刷過程中(zhong)苯(ben)類(lei)(lei)溶(rong)(rong)(rong)劑(ji)(ji)揮發不(bu)完(wan)全，包(bao)裝(zhuang)(zhuang)材料(liao)(liao)(liao)或(huo)容器生產設備比較簡陋(lou)時有(you)可(ke)能造成(cheng)苯(ben)類(lei)(lei)物質(zhi)在(zai)包(bao)裝(zhuang)(zhuang)材料(liao)(liao)(liao)中(zhong)殘留。食(shi)品(pin)包(bao)裝(zhuang)(zhuang)設計(ji)過程中(zhong)苯(ben)類(lei)(lei)物質(zhi)滲透到食(shi)品(pin)中(zhong)，會導致(zhi)食(shi)品(pin)中(zhong)含有(you)苯(ben)。