主(zhu)(zhu)要毒(du)性(xing)物(wu)(wu)質：苯(ben)(ben)被公認為(wei)致(zhi)癌物(wu)(wu)質，但苯(ben)(ben)類是樹脂(zhi)材料(liao)(liao)的良好溶劑，它具有(you)溶解性(xing)強，揮發速度快(kuai)，價(jia)格便宜等優點，因(yin)此被廣泛用于(yu)樹脂(zhi)的溶劑。在包(bao)裝(zhuang)(zhuang)(zhuang)(zhuang)中(zhong)(zhong)(zhong)主(zhu)(zhu)要用于(yu)復合包(bao)裝(zhuang)(zhuang)(zhuang)(zhuang)材料(liao)(liao)粘和(he)劑和(he)塑(su)料(liao)(liao)印(yin)刷油墨的溶劑。由(you)于(yu)在復合材料(liao)(liao)和(he)塑(su)料(liao)(liao)印(yin)刷過(guo)程(cheng)中(zhong)(zhong)(zhong)苯(ben)(ben)類溶劑揮發不完全，包(bao)裝(zhuang)(zhuang)(zhuang)(zhuang)材料(liao)(liao)或容(rong)器(qi)生(sheng)產設(she)備比較簡陋時(shi)有(you)可能造成苯(ben)(ben)類物(wu)(wu)質在包(bao)裝(zhuang)(zhuang)(zhuang)(zhuang)材料(liao)(liao)中(zhong)(zhong)(zhong)殘留。食(shi)(shi)品包(bao)裝(zhuang)(zhuang)(zhuang)(zhuang)設(she)計過(guo)程(cheng)中(zhong)(zhong)(zhong)苯(ben)(ben)類物(wu)(wu)質滲透到食(shi)(shi)品中(zhong)(zhong)(zhong)，會導致(zhi)食(shi)(shi)品中(zhong)(zhong)(zhong)含(han)有(you)苯(ben)(ben)。