主(zhu)(zhu)要毒性(xing)物質(zhi)：苯(ben)被公認為致癌物質(zhi)，但苯(ben)類是(shi)樹脂(zhi)材(cai)料(liao)的良(liang)好溶(rong)劑，它具有(you)(you)溶(rong)解性(xing)強，揮(hui)發(fa)速度快，價(jia)格便宜等優點，因此被廣泛(fan)用(yong)(yong)于(yu)樹脂(zhi)的溶(rong)劑。在包(bao)裝(zhuang)中(zhong)(zhong)(zhong)主(zhu)(zhu)要用(yong)(yong)于(yu)復(fu)合包(bao)裝(zhuang)材(cai)料(liao)粘和(he)劑和(he)塑(su)料(liao)印(yin)刷油墨的溶(rong)劑。由(you)于(yu)在復(fu)合材(cai)料(liao)和(he)塑(su)料(liao)印(yin)刷過程中(zhong)(zhong)(zhong)苯(ben)類溶(rong)劑揮(hui)發(fa)不完全，包(bao)裝(zhuang)材(cai)料(liao)或容器(qi)生產設(she)備比較簡(jian)陋時(shi)有(you)(you)可能造成苯(ben)類物質(zhi)在包(bao)裝(zhuang)材(cai)料(liao)中(zhong)(zhong)(zhong)殘留。食品(pin)包(bao)裝(zhuang)設(she)計過程中(zhong)(zhong)(zhong)苯(ben)類物質(zhi)滲透到(dao)食品(pin)中(zhong)(zhong)(zhong)，會導致食品(pin)中(zhong)(zhong)(zhong)含(han)有(you)(you)苯(ben)。