西安食(shi)(shi)品(pin)真空(kong)(kong)包裝(zhuang)袋(dai)技術是(shi)(shi)把(ba)(ba)食(shi)(shi)品(pin)裝(zhuang)入氣(qi)密性(xing)包裝(zhuang)容器或袋(dai)內,然(ran)后將包裝(zhuang)袋(dai)內的(de)(de)空(kong)(kong)氣(qi)排除,造成(cheng)一定(ding)的(de)(de)真空(kong)(kong)度,再(zai)進行密封性(xing)封口的(de)(de)一種包裝(zhuang)方法。真空(kong)(kong)包裝(zhuang)的(de)(de)主要(yao)作用(yong)(yong)是(shi)(shi)除氧(yang),以利(li)于防止食(shi)(shi)品(pin)變質(zhi)。其原(yuan)(yuan)理也比(bi)較(jiao)簡單,因食(shi)(shi)品(pin)霉腐變質(zhi)主要(yao)由微(wei)(wei)生物(wu)(wu)的(de)(de)活(huo)動造成(cheng),而大多(duo)數(shu)微(wei)(wei)生物(wu)(wu)(如霉菌(jun)和酵母菌(jun))的(de)(de)生存(cun)(cun)是(shi)(shi)需要(yao)氧(yang)氣(qi)的(de)(de),而真空(kong)(kong)包裝(zhuang)就是(shi)(shi)運用(yong)(yong)這個原(yuan)(yuan)理,把(ba)(ba)包裝(zhuang)袋(dai)內和食(shi)(shi)品(pin)細胞內的(de)(de)氧(yang)氣(qi)抽掉,使微(wei)(wei)生物(wu)(wu)失(shi)去“生存(cun)(cun)的(de)(de)環境”。