真(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)(bao)裝(zhuang)的主要作(zuo)用(yong)除真(zhen)(zhen)空(kong)包(bao)(bao)裝(zhuang)所(suo)具備的除氧保(bao)質功能外(wai)，主要 還(huan)有(you)抗壓、阻氣(qi)、保(bao)鮮等作(zuo)用(yong)，能更有(you)效地 使食(shi)品(pin)長期保(bao)持原(yuan)有(you)的色、香(xiang)、味(wei)、形(xing)及營養(yang)價值(zhi)。另外(wai)，有(you)許多食(shi)品(pin)不適宜(yi)采用(yong)真(zhen)(zhen)空(kong)包(bao)(bao)裝(zhuang)而必(bi)須采用(yong)真(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)(bao)裝(zhuang)。如松脆易碎食(shi)品(pin)，易結(jie)塊食(shi)品(pin)，易變(bian)形(xing)走油食(shi)品(pin)，有(you)尖銳棱角或硬(ying)度較高會刺破(po)(po)包(bao)(bao)裝(zhuang)袋(dai)的食(shi)品(pin)等。食(shi)品(pin)經真(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)(bao)裝(zhuang)后，包(bao)(bao)裝(zhuang)袋(dai)內充(chong)(chong)氣(qi)壓強大于包(bao)(bao)裝(zhuang)袋(dai)外(wai)大氣(qi)壓強，能有(you)效地防止食(shi)品(pin)受(shou)壓破(po)(po)碎變(bian)形(xing)并不影響包(bao)(bao)裝(zhuang)袋(dai)外(wai)觀及 印刷(shua)裝(zhuang)潢。