常chang人ren們men認ren為wei
，隻zhi要yao包bao裝zhuang的de食shi品pin在zai保bao質zhi期qi內nei，就jiu應ying該gai是shi安an全quan的de
，但dan有you時shi並bing非fei如ru此ci。為wei了le保bao證zheng食shi品pin安an全quan，使shi消xiao費fei者zhe不bu誤wu食shi變bian質zhi食shi品pin
，科ke學xue家jia研yan究jiu出chu一yi些xie能neng指zhi示shi食shi品pin是shi否fou變bian質zhi的de新xin型xing包bao裝zhuang技ji術shu以yi及ji延yan長chang食shi品pin保bao鮮xian期qi的de包bao裝zhuang技ji術shu，這zhe些xie技ji術shu統tong稱cheng“活性包裝技術”或“智能包裝技術”。可惜
，我國目前在這方麵還很落後。

　　■“聰明”食品來自“積極”包裝

　　weiyanhuanshiwuyinyanghuaerbianzhi，muqianpubiandezuofashizaibaozhuanglimianfangjinyigetiefenxiaobao
，liyongtiedeyanghuaguochenglaihaodiaobaozhuanglimiandeyangqi。danyouxiegukezaishipindangzhongyikanjianyinzhe“勿食”字樣的小包就不太得勁兒，而新包裝是在包裝紙裏加上一層“吸”氧(yang)的(de)材(cai)料(liao)，這(zhe)就(jiu)可(ke)以(yi)使(shi)他(ta)們(men)感(gan)覺(jiao)舒(shu)服(fu)很(hen)多(duo)。再(zai)比(bi)如(ru)，一(yi)些(xie)保(bao)鮮(xian)食(shi)品(pin)需(xu)要(yao)在(zai)低(di)溫(wen)下(xia)保(bao)存(cun)
，否(fou)則(ze)裏(li)麵(mian)的(de)細(xi)菌(jun)就(jiu)會(hui)活(huo)躍(yue)起(qi)來(lai)
，導(dao)致(zhi)食(shi)品(pin)變(bian)質(zhi)。在(zai)包(bao)裝(zhuang)上(shang)貼(tie)上(shang)能(neng)指(zhi)示(shi)時(shi)間(jian)和(he)溫(wen)度(du)的(de)新(xin)型(xing)標(biao)簽(qian)
，其(qi)中(zhong)的(de)化(hua)學(xue)成(cheng)分(fen)在(zai)溫(wen)度(du)升(sheng)高(gao)時(shi)會(hui)發(fa)生(sheng)聚(ju)合(he)作(zuo)用(yong)
，標(biao)簽(qian)顏(yan)色(se)相(xiang)應(ying)會(hui)有(you)明(ming)暗(an)的(de)變(bian)化(hua)，顧(gu)客(ke)由(you)此(ci)可(ke)以(yi)知(zhi)道(dao)食(shi)品(pin)在(zai)什(shen)麼(me)溫(wen)度(du)下(xia)儲(chu)存(cun)、儲存了多久
，新鮮的程度到底怎樣。

　　據英國《新科學家》報道，這類被稱為“積極包裝”的技術
，已經在美國
、法fa國guo等deng地di投tou入ru使shi用yong。許xu多duo公gong司si認ren識shi到dao，讓rang顧gu客ke明ming了le提ti供gong給gei他ta們men的de食shi品pin新xin鮮xian無wu訛e
，其qi潛qian在zai的de商shang業ye利li益yi是shi巨ju大da的de，開kai發fa使shi用yong新xin技ji術shu的de額e外wai成cheng本ben與yu此ci相xiang比bi
，不bu過guo是shi“小巫見大巫”。目前，美國一些公司正在開發冷凍食品的保鮮指示包裝，新包裝可以監測到肉、yuhuoshucaiyinlengdongbudangfulanbianzhishifangchulaideqiti。butongshuiguoshucaibaoxiansuoxuyaodeyangqiheeryanghuatandenongdubutong，zhenduizheyitexingdebaozhuangjishuyezaiyanfazhizhong。jialifuniyazhoudeyijiagongsizhengzaiyanzhiyizhongbaozhuangmo，zhezhongmokeyisuiwendugaibianqishentounengli，manzubutongshuiguoshucaiduiyangqiheeryanghuatandebutongxuyao。zaixinxilan，yanjiurenyuanzaikaifayizhongshuiguobaozhuang，zhezhongbaozhuangkeyizhishixiangtaozizheyangpajipayadeshuiguoshenmeshihoushutou。shipinjishuyanjiurenyuanguji，weilai20%至40%的食品包裝會應用“積極包裝”技術。

　　■指示食品是否變質

　　食品包裝研究人員發現，有些材料可以吸收包裝袋中的氧；有些材料會與食物變質時產生的氣體相互作用，改變顏色；有you些xie材cai料liao在zai溫wen度du變bian化hua時shi會hui改gai變bian顏yan色se等deng。如ru果guo用yong這zhe樣yang的de材cai料liao包bao裝zhuang食shi品pin
，就jiu有you利li於yu防fang止zhi食shi品pin氧yang化hua變bian質zhi
，或huo為wei消xiao費fei者zhe提ti供gong更geng多duo食shi品pin是shi否fou安an全quan的de信xin息xi。

　　由於這些活性材料包裝具有顯示食品安全的功能，因此許多公司正在以多種形式合作研究這種“活性包裝”。法國的“不二價”超市連鎖店正在許多新鮮食品上使用一種被稱為“時間溫度指示”debaozhuangjishu。shijishangtashiyigebiaoqian，keyixianshishipinzaimouyiwenduxiabaocunleduochangshijian。zhezhongbiaoqianxiangshejiyongdebazi
，youxuduoquantaoquandetoumingyuanhuan，zhongxindehuanhanyouyizhonghuaxuewuzhi。zhezhonghuaxuewuzhihuisuishijianhewendubutongerchanshengjuhezuoyong，bingyoutoumingbianchengheise。ruguobaozhuangdeshipinbaochizaidiwenzhuangtai，gaihuaxuewuzhidejuhefanyingjiuhenhuanman，yidanwenduzengjia，juhefanyingjiuhuijiasu，huaxuewuzhijiuhuiyoutoumingbianchengheise。youyushipinshangdexijunsuiwenduheshijiandezengjiaerzengjia
，yincihuaxuewuzhibianheidechengduhuiyuelaiyueyanzhong。dangneiquanbianheishi
，jiuyiweizheshipinbuzaixinxian。xiaofeizhekeyitongguozhezhongbiaoqianyansedebianhuapanduanshipinshifouzaigaowenzhuangtaixiabaocunlehenchangshijian。

　　研(yan)究(jiu)人(ren)員(yuan)研(yan)究(jiu)的(de)另(ling)一(yi)種(zhong)食(shi)品(pin)安(an)全(quan)指(zhi)示(shi)包(bao)裝(zhuang)技(ji)術(shu)，是(shi)一(yi)種(zhong)摻(chan)雜(za)染(ran)料(liao)的(de)塑(su)料(liao)圓(yuan)片(pian)，它(ta)通(tong)過(guo)與(yu)包(bao)裝(zhuang)袋(dai)內(nei)食(shi)品(pin)釋(shi)放(fang)的(de)氣(qi)體(ti)發(fa)生(sheng)作(zuo)用(yong)，顯(xian)示(shi)肉(rou)類(lei)和(he)蔬(shu)菜(cai)是(shi)否(fou)變(bian)質(zhi)。這(zhe)種(zhong)塑(su)料(liao)片(pian)放(fang)入(ru)食(shi)品(pin)包(bao)裝(zhuang)袋(dai)後(hou)，如(ru)果(guo)包(bao)裝(zhuang)袋(dai)中(zhong)的(de)食(shi)品(pin)腐(fu)爛(lan)，就(jiu)會(hui)釋(shi)放(fang)出(chu)氣(qi)體(ti)，使(shi)塑(su)料(liao)片(pian)改(gai)變(bian)顏(yan)色(se)。消(xiao)費(fei)者(zhe)根(gen)據(ju)塑(su)料(liao)片(pian)的(de)顏(yan)色(se)就(jiu)能(neng)知(zhi)道(dao)食(shi)品(pin)是(shi)否(fou)變(bian)質(zhi)。

　　■延長保鮮期

　　butongdeshuiguoheshucaixuyaozaiyidingdeyangheeryanghuatannongduxiacainengbaoxian
，erzheyangdeyangheeryanghuatannongduzaimifengdebaozhuangdaizhongnanyikongzhi。yinweidangwendujiaogaoshi
，baozhuangdaineideshuiguohuoshucaihuixiaohaojiaoduodeyangbingshifangjiaoduodeeryanghuatan。yinci
，rubujinxingtiaojie

，shipindebaoxianqishibishoudaoyingxiang。

　　為了解決這一難題
，美國加利福尼亞州門洛帕克市的一家公司正在研究一種名為Intelimer的包裝膜。這種膜在溫度發生變化時，會改變其透氣性
，以使不同的食品保持在最佳的氧和二氧化碳濃度比例之下。

　　減(jian)緩(huan)食(shi)品(pin)變(bian)質(zhi)速(su)度(du)的(de)另(ling)一(yi)種(zhong)方(fang)法(fa)是(shi)用(yong)一(yi)種(zhong)氧(yang)清(qing)除(chu)劑(ji)清(qing)除(chu)氧(yang)氣(qi)，控(kong)製(zhi)包(bao)裝(zhuang)袋(dai)內(nei)的(de)空(kong)氣(qi)環(huan)境(jing)，從(cong)而(er)避(bi)免(mian)食(shi)品(pin)氧(yang)化(hua)變(bian)質(zhi)。目(mu)前(qian)常(chang)用(yong)的(de)方(fang)法(fa)是(shi)在(zai)食(shi)品(pin)包(bao)裝(zhuang)袋(dai)內(nei)放(fang)一(yi)種(zhong)裝(zhuang)有(you)鐵(tie)粉(fen)的(de)小(xiao)香(xiang)袋(dai)
，通(tong)過(guo)鐵(tie)粉(fen)消(xiao)耗(hao)掉(diao)包(bao)裝(zhuang)袋(dai)中(zhong)的(de)氧(yang)氣(qi)。但(dan)這(zhe)個(ge)方(fang)法(fa)存(cun)在(zai)明(ming)顯(xian)不(bu)足(zu)，因(yin)為(wei)小(xiao)香(xiang)袋(dai)上(shang)“不可食用”dejingshibiaozhirongyiyinqixiaofeizhefangan。weici
，meiguoxinzexizhoudeyijiamifengqitigongsizhengzaishengchanyizhongbenshenkeyiqingchuyangqidebaozhuangdaicailiao。zhezhongcailiaoyouyigekeyanghuadejuhewuneiceng
，tanengxiangtiefenyiyangbuhuobingxiaohaobaozhuangdaineideyangqi。