主(zhu)要(yao)毒性物(wu)質：苯被公認為致癌(ai)物(wu)質，但(dan)苯類是樹脂材(cai)料(liao)(liao)的良好溶劑(ji)(ji)，它具(ju)有溶解性強，揮(hui)發速度快，價格(ge)便宜(yi)等優點，因此被廣泛用(yong)于(yu)(yu)樹脂的溶劑(ji)(ji)。在包(bao)裝(zhuang)中(zhong)(zhong)(zhong)主(zhu)要(yao)用(yong)于(yu)(yu)復(fu)合包(bao)裝(zhuang)材(cai)料(liao)(liao)粘和(he)劑(ji)(ji)和(he)塑料(liao)(liao)印刷(shua)油墨的溶劑(ji)(ji)。由于(yu)(yu)在復(fu)合材(cai)料(liao)(liao)和(he)塑料(liao)(liao)印刷(shua)過(guo)(guo)程(cheng)中(zhong)(zhong)(zhong)苯類溶劑(ji)(ji)揮(hui)發不完全，包(bao)裝(zhuang)材(cai)料(liao)(liao)或容器生產設備比較(jiao)簡陋時有可能造(zao)成苯類物(wu)質在包(bao)裝(zhuang)材(cai)料(liao)(liao)中(zhong)(zhong)(zhong)殘留。食品包(bao)裝(zhuang)設計過(guo)(guo)程(cheng)中(zhong)(zhong)(zhong)苯類物(wu)質滲透(tou)到食品中(zhong)(zhong)(zhong)，會(hui)導致食品中(zhong)(zhong)(zhong)含有苯。