現在市場基本有(you)兩種(zhong)包(bao)(bao)(bao)裝(zhuang)形(xing)式，一(yi)種(zhong)為(wei)普(pu)通(tong)的(de)包(bao)(bao)(bao)裝(zhuang)，利用(yong)(yong)聚(ju)丙稀塑料編織袋對(dui)(dui)大米(mi)進行包(bao)(bao)(bao)裝(zhuang)，包(bao)(bao)(bao)裝(zhuang)過程中不施加任何(he)的(de)保鮮技(ji)(ji)術，這種(zhong)包(bao)(bao)(bao)裝(zhuang)對(dui)(dui)于(yu)(yu)大米(mi)的(de)防(fang)蟲及防(fang)霉等方面的(de)效果差(cha)。還有(you)一(yi)種(zhong)是(shi)用(yong)(yong)真(zhen)空(kong)(kong)(kong)(kong)包(bao)(bao)(bao)裝(zhuang)技(ji)(ji)術對(dui)(dui)包(bao)(bao)(bao)裝(zhuang)袋進行抽真(zhen)空(kong)(kong)(kong)(kong)，真(zhen)空(kong)(kong)(kong)(kong)鈄技(ji)(ji)術對(dui)(dui)大米(mi)的(de)儲(chu)存有(you)較好的(de)保鮮作用(yong)(yong)，但用(yong)(yong)于(yu)(yu)大米(mi)自(zi)身的(de)形(xing)狀及真(zhen)空(kong)(kong)(kong)(kong)度(du)的(de)選(xuan)擇并不合適，目前(qian)大米(mi)真(zhen)空(kong)(kong)(kong)(kong)包(bao)(bao)(bao)裝(zhuang)選(xuan)用(yong)(yong)的(de)真(zhen)空(kong)(kong)(kong)(kong)度(du)一(yi)般在-0.07～-0.09kPa之間，只要真(zhen)空(kong)(kong)(kong)(kong)度(du)在范圍內，所出廠的(de)就是(shi)合格產品。