主(zhu)要(yao)毒性物(wu)質(zhi)：苯(ben)被(bei)(bei)公認(ren)為(wei)致癌物(wu)質(zhi)，但苯(ben)類是樹脂材(cai)(cai)料(liao)的良(liang)好溶(rong)(rong)劑(ji)，它具有(you)溶(rong)(rong)解性強，揮(hui)發速(su)度(du)快，價格便宜等(deng)優點，因此被(bei)(bei)廣(guang)泛用(yong)于(yu)樹脂的溶(rong)(rong)劑(ji)。在(zai)包(bao)(bao)裝中(zhong)主(zhu)要(yao)用(yong)于(yu)復合(he)包(bao)(bao)裝材(cai)(cai)料(liao)粘和(he)劑(ji)和(he)塑料(liao)印刷油(you)墨的溶(rong)(rong)劑(ji)。由于(yu)在(zai)復合(he)材(cai)(cai)料(liao)和(he)塑料(liao)印刷過程中(zhong)苯(ben)類溶(rong)(rong)劑(ji)揮(hui)發不(bu)完全，包(bao)(bao)裝材(cai)(cai)料(liao)或(huo)容器(qi)生(sheng)產設備比較簡陋時有(you)可能造成苯(ben)類物(wu)質(zhi)在(zai)包(bao)(bao)裝材(cai)(cai)料(liao)中(zhong)殘留。食(shi)(shi)(shi)品包(bao)(bao)裝設計過程中(zhong)苯(ben)類物(wu)質(zhi)滲透(tou)到食(shi)(shi)(shi)品中(zhong)，會導致食(shi)(shi)(shi)品中(zhong)含有(you)苯(ben)。