真空(kong)(kong)(kong)充氣包(bao)(bao)裝(zhuang)(zhuang)的主要(yao)作(zuo)用(yong)除真空(kong)(kong)(kong)包(bao)(bao)裝(zhuang)(zhuang)所具(ju)備的除氧保質功能外，主要(yao)還有(you)抗壓、阻氣、保鮮等作(zuo)用(yong)，能更(geng)有(you)效地使(shi)食(shi)(shi)(shi)(shi)品長期保持原有(you)的色、香、味、形(xing)(xing)及營養價值。另外，有(you)許多食(shi)(shi)(shi)(shi)品不適宜采用(yong)真空(kong)(kong)(kong)包(bao)(bao)裝(zhuang)(zhuang)而(er)必須采用(yong)真空(kong)(kong)(kong)包(bao)(bao)裝(zhuang)(zhuang)機真空(kong)(kong)(kong)充氣包(bao)(bao)裝(zhuang)(zhuang)。如(ru)松脆易碎食(shi)(shi)(shi)(shi)品，易結塊(kuai)食(shi)(shi)(shi)(shi)品，易變(bian)形(xing)(xing)走油(you)食(shi)(shi)(shi)(shi)品，有(you)尖銳棱角或硬度較高會(hui)刺(ci)破包(bao)(bao)裝(zhuang)(zhuang)袋(dai)(dai)的食(shi)(shi)(shi)(shi)品等。食(shi)(shi)(shi)(shi)品經真空(kong)(kong)(kong)充氣包(bao)(bao)裝(zhuang)(zhuang)后，包(bao)(bao)裝(zhuang)(zhuang)袋(dai)(dai)內(nei)充氣壓強(qiang)大于包(bao)(bao)裝(zhuang)(zhuang)袋(dai)(dai)外大氣壓強(qiang)，能有(you)效地防止食(shi)(shi)(shi)(shi)品受壓破碎變(bian)形(xing)(xing)并不影(ying)響(xiang)包(bao)(bao)裝(zhuang)(zhuang)袋(dai)(dai)外觀及印刷裝(zhuang)(zhuang)潢。