隨著食品加工業的迅猛發展,所需的包裝也日益增加,食品包裝與食品直接接觸,其材料選擇得當與否,直接關係到人們的身體健康。
我國在包裝材料的生產加工使用上,仍有不當現象。市場上出售的食品包裝材料有紙張、塑料、金屬、陶瓷等,其中紙張和塑料使用最多,其安全性值得探討。
紙張造紙的基本原料是天然纖維,經過一係列處理製成紙。為了提高紙的潔白度、gaishanganguanzhibiao,duoshuzhizhangdoujingguoyingguangzengbaijichuli。yingguangzengbaijishiyizhongzhiaihuoxinghenqiangdehuaxuewuzhi,tasuirannengqidaopiaobaixianweidezuoyong,danduirenhedongwuyeyouhendadeduhaizuoyong,suoyishipinbaozhuangzhongyingshiyongweijingzengbaidezhizhang。ribenhoushengshengjingguodongwushiyanzhengshiletadezhiaixing,yiyanjinzaishipinbaozhuangyongzhizhongshiyongyingguangzengbaiji。woguoyouguanbumenyetichuguoleisiyaoqiu,danquefayouxiaojiandu,shiyongzengbaidezhizhangzuoshipinbaozhuangdexianxiangrenglvjianbuxian。
包bao裝zhuang用yong紙zhi中zhong的de油you墨mo汙wu染ran也ye很hen嚴yan重zhong,對dui消xiao費fei者zhe健jian康kang造zao成cheng威wei脅xie。在zai部bu分fen地di區qu,使shi用yong報bao紙zhi包bao裝zhuang食shi品pin仍reng司si空kong見jian慣guan。報bao紙zhi上shang的de油you墨mo含han有you油you溶rong性xing有you毒du物wu質zhi,可ke向xiang食shi品pin中zhong滲shen透tou,導dao致zhi汙wu染ran食shi品pin,尤you其qi是shi油you炸zha食shi品pin用yong報bao紙zhi包bao裝zhuang汙wu染ran更geng甚shen。另ling一yi種zhong情qing況kuang是shi,廠chang商shang喜xi歡huan用yong彩cai色se包bao裝zhuang紙zhi包bao裝zhuang食shi品pin,以yi增zeng加jia其qi裝zhuang飾shi性xing。雖sui然ran彩cai色se油you墨mo是shi單dan麵mian印yin刷shua在zai食shi品pin包bao裝zhuang紙zhi外wai側ce,但dan印yin刷shua後hou的de彩cai紙zhi是shi捆kun疊die在zai一yi起qi的de,每mei張zhang包bao裝zhuang紙zhi的de無wu印yin刷shua麵mian也ye接jie觸chu了le油you墨mo,即ji使shi是shi浸jin了le石shi蠟la的de彩cai色se蠟la紙zhi,也ye會hui因yin塗tu蠟la不bu勻yun、彩色油墨仍有機會與食品直接接觸。因此,包裝紙中彩色油墨所用的塗料應受到嚴格的衛生控製。
還有許多高級食品包裝都使用了錫紙。據了解,60%的錫紙中鉛含量都超過了衛生允許指標。鉛是公認的造成急性、慢性重金屬中毒的“元凶”,因此要嚴格控製錫紙中的含鉛量,同時應避免食品和錫紙直接接觸。
塑su料liao塑su料liao作zuo為wei現xian代dai食shi品pin包bao裝zhuang材cai料liao,發fa展zhan很hen快kuai,令ling人ren矚zhu目mu。從cong理li論lun上shang講jiang,單dan體ti經jing過guo聚ju合he後hou一yi般ban性xing質zhi穩wen定ding,應ying當dang是shi無wu毒du的de。但dan是shi某mou些xie塑su料liao為wei了le改gai善shan性xing能neng加jia入ru了le增zeng塑su劑ji和he防fang老lao劑ji,這zhe些xie添tian加jia劑ji往wang往wang有you毒du,所suo以yi使shi用yong塑su料liao作zuo食shi品pin包bao裝zhuang仍reng應ying十shi分fen謹jin慎shen。當dang前qian用yong作zuo食shi品pin包bao裝zhuang的de塑su料liao主zhu要yao有you聚ju乙yi烯xi、聚丙烯、聚苯乙烯這幾種,一般不加增塑劑、防fang老lao劑ji,因yin而er無wu毒du。聚ju氯lv乙yi烯xi也ye是shi一yi種zhong常chang用yong的de塑su料liao,但dan其qi生sheng產chan中zhong使shi用yong了le添tian加jia劑ji,如ru以yi鄰lin苯ben二er甲jia酸suan二er丁ding酯zhi作zuo增zeng塑su劑ji,後hou者zhe有you毒du。包bao裝zhuang含han油you食shi品pin如ru油you條tiao、點心時,就會使包裝中的鉛發生轉移擴散到食品中去,常食用這種包裝的食品,就會發生慢性鉛中毒。
另外,聚氯乙烯製品在高溫下如80℃以上,就會緩慢析出氯化氫氣體(HCI),zhezhongqitiduirentiyouhai,yincijulvyixibuyiyongzuoshipinbaozhuangcailiao。feijiuhuishousuliaodezaishengzhipin,yinyuanliaolaiyuanfuza,hennanquebaobudaiduxing,suoyiyebuyizuoshipinshengjuhebaozhuang,gengbuyishengzhuangshiyongyou.
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