主(zhu)要毒性(xing)物質(zhi)：苯(ben)(ben)被公(gong)認(ren)為(wei)致(zhi)癌物質(zhi)，但苯(ben)(ben)類是樹脂材(cai)料的良好溶(rong)劑(ji)(ji)，它具(ju)有(you)溶(rong)解性(xing)強，揮發速度快，價(jia)格便(bian)宜等優點，因此被廣泛用于(yu)樹脂的溶(rong)劑(ji)(ji)。在包裝中(zhong)(zhong)主(zhu)要用于(yu)復合(he)(he)包裝材(cai)料粘和劑(ji)(ji)和塑(su)料印刷油墨的溶(rong)劑(ji)(ji)。由(you)于(yu)在復合(he)(he)材(cai)料和塑(su)料印刷過(guo)程(cheng)中(zhong)(zhong)苯(ben)(ben)類溶(rong)劑(ji)(ji)揮發不完全，包裝材(cai)料或容(rong)器生產設(she)備比較簡陋時(shi)有(you)可能(neng)造(zao)成苯(ben)(ben)類物質(zhi)在包裝材(cai)料中(zhong)(zhong)殘(can)留(liu)。食品包裝設(she)計過(guo)程(cheng)中(zhong)(zhong)苯(ben)(ben)類物質(zhi)滲透到(dao)食品中(zhong)(zhong)，會(hui)導(dao)致(zhi)食品中(zhong)(zhong)含有(you)苯(ben)(ben)。