真空(kong)包(bao)裝的(de)一種(zhong)(zhong)變(bian)種(zhong)(zhong)是充氣包(bao)裝。充氣(qi)包裝的主要作用除真(zhen)空(kong)包(bao)(bao)(bao)裝所(suo)具備的除氧保(bao)質(zhi)功能外，主要還有抗壓、阻氣、保(bao)鮮等(deng)作用，能更有效 地(di)使食(shi)(shi)品長期保(bao)持原有的色、香、味、形(xing)及營養(yang)價值。另外，有許多(duo)食(shi)(shi)品不宜采用真(zhen)空(kong)包(bao)(bao)(bao)裝，而必須采用充氣包(bao)(bao)(bao)裝。如(ru)松脆(cui)易碎食(shi)(shi)品、易結塊食(shi)(shi)品、易變形(xing)走油(you)食(shi)(shi)品、有尖銳棱角或硬度較(jiao)高會刺破包(bao)(bao)(bao)裝袋的食(shi)(shi)品等(deng)。食(shi)(shi)品經(jing)食(shi)品(pin)真空(kong)包裝機抽氣(qi)包(bao)(bao)裝后，充入一些氣(qi)體，使包(bao)(bao)裝袋(dai)內充氣(qi)壓(ya)(ya)強大于包(bao)(bao)裝袋(dai)外大氣(qi)壓(ya)(ya)強，能有效地防止食(shi)品受壓(ya)(ya)破(po)碎變形，并(bing)不影(ying)響包(bao)(bao)裝袋(dai)外觀及印(yin)刷裝潢。