現在(zai)市場基本有(you)(you)兩種(zhong)包裝(zhuang)形(xing)式(shi)，一(yi)種(zhong)為普通的包裝(zhuang)，利用(yong)(yong)聚丙稀塑(su)料編織袋對(dui)大(da)米(mi)(mi)進行(xing)(xing)包裝(zhuang)，包裝(zhuang)過程中不施加任何的保(bao)鮮技術，這種(zhong)包裝(zhuang)對(dui)于大(da)米(mi)(mi)的防(fang)(fang)蟲及防(fang)(fang)霉(mei)等方面的效果差(cha)。還有(you)(you)一(yi)種(zhong)是用(yong)(yong)真(zhen)(zhen)空(kong)(kong)(kong)包裝(zhuang)技術對(dui)包裝(zhuang)袋進行(xing)(xing)抽真(zhen)(zhen)空(kong)(kong)(kong)，真(zhen)(zhen)空(kong)(kong)(kong)鈄(tou)技術對(dui)大(da)米(mi)(mi)的儲存(cun)有(you)(you)較好(hao)的保(bao)鮮作用(yong)(yong)，但用(yong)(yong)于大(da)米(mi)(mi)自(zi)身(shen)的形(xing)狀(zhuang)及真(zhen)(zhen)空(kong)(kong)(kong)度(du)的選(xuan)擇并不合適，目前大(da)米(mi)(mi)真(zhen)(zhen)空(kong)(kong)(kong)包裝(zhuang)選(xuan)用(yong)(yong)的真(zhen)(zhen)空(kong)(kong)(kong)度(du)一(yi)般在(zai)-0.07～-0.09kPa之(zhi)間，只要真(zhen)(zhen)空(kong)(kong)(kong)度(du)在(zai)范圍內，所(suo)出廠的就是合格產品。