真空充(chong)氣(qi)(qi)包(bao)(bao)(bao)裝(zhuang)(zhuang)的主要作用(yong)除真空包(bao)(bao)(bao)裝(zhuang)(zhuang)所具備的除氧保質功能(neng)(neng)外，主要還(huan)有(you)(you)(you)抗壓(ya)、阻(zu)氣(qi)(qi)、保鮮等(deng)作用(yong)，能(neng)(neng)更有(you)(you)(you)效地使食(shi)(shi)品(pin)(pin)(pin)(pin)長期保持(chi)原有(you)(you)(you)的色(se)、香、味、形及(ji)營養價值。另(ling)外，有(you)(you)(you)許多食(shi)(shi)品(pin)(pin)(pin)(pin)不適宜采用(yong)真空包(bao)(bao)(bao)裝(zhuang)(zhuang)而必(bi)須采用(yong)真空包(bao)(bao)(bao)裝(zhuang)(zhuang)機真空充(chong)氣(qi)(qi)包(bao)(bao)(bao)裝(zhuang)(zhuang)。如(ru)松脆易(yi)碎食(shi)(shi)品(pin)(pin)(pin)(pin)，易(yi)結(jie)塊食(shi)(shi)品(pin)(pin)(pin)(pin)，易(yi)變(bian)形走油(you)食(shi)(shi)品(pin)(pin)(pin)(pin)，有(you)(you)(you)尖銳棱(leng)角(jiao)或硬度較高(gao)會刺破包(bao)(bao)(bao)裝(zhuang)(zhuang)袋(dai)的食(shi)(shi)品(pin)(pin)(pin)(pin)等(deng)。食(shi)(shi)品(pin)(pin)(pin)(pin)經(jing)真空充(chong)氣(qi)(qi)包(bao)(bao)(bao)裝(zhuang)(zhuang)后，包(bao)(bao)(bao)裝(zhuang)(zhuang)袋(dai)內充(chong)氣(qi)(qi)壓(ya)強大于包(bao)(bao)(bao)裝(zhuang)(zhuang)袋(dai)外大氣(qi)(qi)壓(ya)強，能(neng)(neng)有(you)(you)(you)效地防止食(shi)(shi)品(pin)(pin)(pin)(pin)受壓(ya)破碎變(bian)形并不影響(xiang)包(bao)(bao)(bao)裝(zhuang)(zhuang)袋(dai)外觀及(ji)印(yin)刷裝(zhuang)(zhuang)潢。