真空(kong)充(chong)氣(qi)(qi)包(bao)(bao)(bao)(bao)裝(zhuang)的(de)主要(yao)(yao)作用(yong)(yong)除(chu)真空(kong)包(bao)(bao)(bao)(bao)裝(zhuang)所具備的(de)除(chu)氧保質(zhi)功能外，主要(yao)(yao) 還(huan)有(you)(you)抗壓(ya)、阻(zu)氣(qi)(qi)、保鮮等作用(yong)(yong)，能更有(you)(you)效地 使食(shi)(shi)品(pin)長期保持原有(you)(you)的(de)色、香(xiang)、味、形及(ji)營養價值。另外，有(you)(you)許多食(shi)(shi)品(pin)不適宜采用(yong)(yong)真空(kong)包(bao)(bao)(bao)(bao)裝(zhuang)而必(bi)須采用(yong)(yong)真空(kong)充(chong)氣(qi)(qi)包(bao)(bao)(bao)(bao)裝(zhuang)。如(ru)松(song)脆易(yi)碎(sui)食(shi)(shi)品(pin)，易(yi)結塊(kuai)食(shi)(shi)品(pin)，易(yi)變形走(zou)油食(shi)(shi)品(pin)，有(you)(you)尖銳棱角或硬度較高會刺破包(bao)(bao)(bao)(bao)裝(zhuang)袋的(de)食(shi)(shi)品(pin)等。食(shi)(shi)品(pin)經真空(kong)充(chong)氣(qi)(qi)包(bao)(bao)(bao)(bao)裝(zhuang)后(hou)，包(bao)(bao)(bao)(bao)裝(zhuang)袋內充(chong)氣(qi)(qi)壓(ya)強大于包(bao)(bao)(bao)(bao)裝(zhuang)袋外大氣(qi)(qi)壓(ya)強，能有(you)(you)效地防止(zhi)食(shi)(shi)品(pin)受壓(ya)破碎(sui)變形并(bing)不影響包(bao)(bao)(bao)(bao)裝(zhuang)袋外觀及(ji) 印刷(shua)裝(zhuang)潢。