主要毒性(xing)物(wu)質：苯(ben)被公認(ren)為(wei)致(zhi)癌物(wu)質，但苯(ben)類是(shi)樹(shu)脂材(cai)(cai)料的(de)良好(hao)溶(rong)劑(ji)，它具有(you)溶(rong)解(jie)性(xing)強，揮發速(su)度(du)快，價格便宜等優(you)點(dian)，因此被廣泛用(yong)于樹(shu)脂的(de)溶(rong)劑(ji)。在(zai)(zai)包裝(zhuang)中(zhong)(zhong)(zhong)主要用(yong)于復合(he)包裝(zhuang)材(cai)(cai)料粘和劑(ji)和塑料印刷油墨的(de)溶(rong)劑(ji)。由于在(zai)(zai)復合(he)材(cai)(cai)料和塑料印刷過程中(zhong)(zhong)(zhong)苯(ben)類溶(rong)劑(ji)揮發不完全，包裝(zhuang)材(cai)(cai)料或容器生產(chan)設備比(bi)較簡(jian)陋時有(you)可能造成苯(ben)類物(wu)質在(zai)(zai)包裝(zhuang)材(cai)(cai)料中(zhong)(zhong)(zhong)殘留。食(shi)品(pin)包裝(zhuang)設計過程中(zhong)(zhong)(zhong)苯(ben)類物(wu)質滲(shen)透到食(shi)品(pin)中(zhong)(zhong)(zhong)，會(hui)導(dao)致(zhi)食(shi)品(pin)中(zhong)(zhong)(zhong)含有(you)苯(ben)。