真空(kong)(kong)充氣(qi)(qi)包(bao)(bao)裝(zhuang)的主要作(zuo)(zuo)用(yong)除(chu)真空(kong)(kong)包(bao)(bao)裝(zhuang)所具備的除(chu)氧保質功(gong)能外(wai)(wai)，主要 還有(you)抗壓(ya)、阻(zu)氣(qi)(qi)、保鮮等(deng)作(zuo)(zuo)用(yong)，能更有(you)效地(di) 使食(shi)(shi)(shi)(shi)品長期保持原有(you)的色、香、味、形(xing)及(ji)營養價(jia)值。另(ling)外(wai)(wai)，有(you)許多食(shi)(shi)(shi)(shi)品不適宜采(cai)用(yong)真空(kong)(kong)包(bao)(bao)裝(zhuang)而必須采(cai)用(yong)真空(kong)(kong)充氣(qi)(qi)包(bao)(bao)裝(zhuang)。如松(song)脆(cui)易碎食(shi)(shi)(shi)(shi)品，易結(jie)塊(kuai)食(shi)(shi)(shi)(shi)品，易變形(xing)走油食(shi)(shi)(shi)(shi)品，有(you)尖(jian)銳棱(leng)角或(huo)硬度(du)較高會刺破(po)包(bao)(bao)裝(zhuang)袋(dai)的食(shi)(shi)(shi)(shi)品等(deng)。食(shi)(shi)(shi)(shi)品經真空(kong)(kong)充氣(qi)(qi)包(bao)(bao)裝(zhuang)后(hou)，包(bao)(bao)裝(zhuang)袋(dai)內充氣(qi)(qi)壓(ya)強(qiang)大(da)于(yu)包(bao)(bao)裝(zhuang)袋(dai)外(wai)(wai)大(da)氣(qi)(qi)壓(ya)強(qiang)，能有(you)效地(di)防止食(shi)(shi)(shi)(shi)品受(shou)壓(ya)破(po)碎變形(xing)并不影響包(bao)(bao)裝(zhuang)袋(dai)外(wai)(wai)觀及(ji) 印刷裝(zhuang)潢。