現在市(shi)場基本有(you)兩種(zhong)(zhong)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)形(xing)式，一種(zhong)(zhong)為(wei)普通的(de)(de)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)，利用(yong)(yong)(yong)聚丙稀(xi)塑料(liao)編織袋(dai)對(dui)(dui)大(da)米(mi)(mi)(mi)(mi)進行(xing)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)，包(bao)(bao)裝(zhuang)(zhuang)(zhuang)過程中不施加任何的(de)(de)保(bao)鮮技(ji)術，這種(zhong)(zhong)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)對(dui)(dui)于大(da)米(mi)(mi)(mi)(mi)的(de)(de)防蟲及防霉(mei)等方面的(de)(de)效果差(cha)。還(huan)有(you)一種(zhong)(zhong)是用(yong)(yong)(yong)真空(kong)(kong)(kong)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)技(ji)術對(dui)(dui)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)袋(dai)進行(xing)抽真空(kong)(kong)(kong)，真空(kong)(kong)(kong)鈄技(ji)術對(dui)(dui)大(da)米(mi)(mi)(mi)(mi)的(de)(de)儲存有(you)較好的(de)(de)保(bao)鮮作用(yong)(yong)(yong)，但(dan)用(yong)(yong)(yong)于大(da)米(mi)(mi)(mi)(mi)自身的(de)(de)形(xing)狀及真空(kong)(kong)(kong)度的(de)(de)選擇并不合(he)適(shi)，目前大(da)米(mi)(mi)(mi)(mi)真空(kong)(kong)(kong)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)選用(yong)(yong)(yong)的(de)(de)真空(kong)(kong)(kong)度一般在-0.07～-0.09kPa之間，只要真空(kong)(kong)(kong)度在范圍內，所出(chu)廠的(de)(de)就(jiu)是合(he)格產品(pin)。