主(zhu)要毒(du)性(xing)物(wu)(wu)質：苯(ben)(ben)被(bei)公(gong)認為致癌物(wu)(wu)質，但苯(ben)(ben)類是樹(shu)脂(zhi)材(cai)料(liao)(liao)(liao)(liao)的良好溶(rong)劑(ji)(ji)，它具有溶(rong)解性(xing)強，揮(hui)發速度快，價格(ge)便宜等優點，因此被(bei)廣泛(fan)用(yong)(yong)于樹(shu)脂(zhi)的溶(rong)劑(ji)(ji)。在(zai)包(bao)裝(zhuang)(zhuang)中(zhong)主(zhu)要用(yong)(yong)于復合包(bao)裝(zhuang)(zhuang)材(cai)料(liao)(liao)(liao)(liao)粘和劑(ji)(ji)和塑料(liao)(liao)(liao)(liao)印(yin)刷油墨的溶(rong)劑(ji)(ji)。由于在(zai)復合材(cai)料(liao)(liao)(liao)(liao)和塑料(liao)(liao)(liao)(liao)印(yin)刷過(guo)程(cheng)中(zhong)苯(ben)(ben)類溶(rong)劑(ji)(ji)揮(hui)發不完全，包(bao)裝(zhuang)(zhuang)材(cai)料(liao)(liao)(liao)(liao)或(huo)容(rong)器(qi)生產設備比較簡(jian)陋(lou)時有可能造成苯(ben)(ben)類物(wu)(wu)質在(zai)包(bao)裝(zhuang)(zhuang)材(cai)料(liao)(liao)(liao)(liao)中(zhong)殘留。食(shi)品包(bao)裝(zhuang)(zhuang)設計過(guo)程(cheng)中(zhong)苯(ben)(ben)類物(wu)(wu)質滲(shen)透到食(shi)品中(zhong)，會導致食(shi)品中(zhong)含(han)有苯(ben)(ben)。