主要(yao)(yao)毒性物(wu)質(zhi)(zhi)：苯(ben)被公(gong)認為(wei)致癌物(wu)質(zhi)(zhi)，但(dan)苯(ben)類(lei)是樹脂材(cai)料(liao)的良好溶(rong)(rong)劑(ji)(ji)，它(ta)具有溶(rong)(rong)解性強，揮發速度快，價格(ge)便宜(yi)等優點，因此被廣泛用于(yu)樹脂的溶(rong)(rong)劑(ji)(ji)。在(zai)包裝(zhuang)(zhuang)中(zhong)(zhong)(zhong)主要(yao)(yao)用于(yu)復合包裝(zhuang)(zhuang)材(cai)料(liao)粘和(he)劑(ji)(ji)和(he)塑(su)料(liao)印(yin)刷油墨的溶(rong)(rong)劑(ji)(ji)。由于(yu)在(zai)復合材(cai)料(liao)和(he)塑(su)料(liao)印(yin)刷過程中(zhong)(zhong)(zhong)苯(ben)類(lei)溶(rong)(rong)劑(ji)(ji)揮發不完(wan)全，包裝(zhuang)(zhuang)材(cai)料(liao)或容器生產(chan)設備比較簡陋時(shi)有可能造成苯(ben)類(lei)物(wu)質(zhi)(zhi)在(zai)包裝(zhuang)(zhuang)材(cai)料(liao)中(zhong)(zhong)(zhong)殘(can)留。食品(pin)包裝(zhuang)(zhuang)設計(ji)過程中(zhong)(zhong)(zhong)苯(ben)類(lei)物(wu)質(zhi)(zhi)滲透到食品(pin)中(zhong)(zhong)(zhong)，會導致食品(pin)中(zhong)(zhong)(zhong)含有苯(ben)。