真(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)裝(zhuang)的主要(yao)作(zuo)用(yong)除(chu)真(zhen)空(kong)包(bao)裝(zhuang)所具(ju)備的除(chu)氧(yang)保質(zhi)功能外，主要(yao)還有(you)(you)抗壓(ya)、阻氣(qi)、保鮮等作(zuo)用(yong)，能更有(you)(you)效地(di)使食(shi)(shi)品(pin)長期保持原(yuan)有(you)(you)的色、香(xiang)、味(wei)、形及(ji)營養價值。另外，有(you)(you)許(xu)多食(shi)(shi)品(pin)不(bu)適(shi)宜采用(yong)真(zhen)空(kong)包(bao)裝(zhuang)而必須(xu)采用(yong)真(zhen)空(kong)包(bao)裝(zhuang)機(ji)真(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)裝(zhuang)。如松(song)脆易(yi)碎(sui)食(shi)(shi)品(pin)，易(yi)結塊食(shi)(shi)品(pin)，易(yi)變(bian)形走油食(shi)(shi)品(pin)，有(you)(you)尖銳棱角(jiao)或硬度較(jiao)高(gao)會刺破包(bao)裝(zhuang)袋(dai)的食(shi)(shi)品(pin)等。食(shi)(shi)品(pin)經真(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)裝(zhuang)后，包(bao)裝(zhuang)袋(dai)內(nei)充(chong)(chong)氣(qi)壓(ya)強大于包(bao)裝(zhuang)袋(dai)外大氣(qi)壓(ya)強，能有(you)(you)效地(di)防止食(shi)(shi)品(pin)受(shou)壓(ya)破碎(sui)變(bian)形并不(bu)影響包(bao)裝(zhuang)袋(dai)外觀及(ji)印刷裝(zhuang)潢。