真(zhen)空(kong)充氣(qi)包(bao)(bao)(bao)裝的(de)主(zhu)要(yao)作用(yong)(yong)除真(zhen)空(kong)包(bao)(bao)(bao)裝所具(ju)備的(de)除氧保質功能(neng)外(wai)，主(zhu)要(yao)還(huan)有(you)抗壓、阻氣(qi)、保鮮等(deng)作用(yong)(yong)，能(neng)更有(you)效(xiao)地(di)使食(shi)(shi)品長(chang)期保持原有(you)的(de)色、香、味(wei)、形(xing)及營養價(jia)值。另外(wai)，有(you)許多食(shi)(shi)品不適宜采(cai)(cai)用(yong)(yong)真(zhen)空(kong)包(bao)(bao)(bao)裝而(er)必(bi)須采(cai)(cai)用(yong)(yong)真(zhen)空(kong)包(bao)(bao)(bao)裝機真(zhen)空(kong)充氣(qi)包(bao)(bao)(bao)裝。如松脆易碎食(shi)(shi)品，易結塊食(shi)(shi)品，易變形(xing)走油食(shi)(shi)品，有(you)尖銳棱(leng)角(jiao)或硬度較高會(hui)刺(ci)破包(bao)(bao)(bao)裝袋的(de)食(shi)(shi)品等(deng)。食(shi)(shi)品經真(zhen)空(kong)充氣(qi)包(bao)(bao)(bao)裝后，包(bao)(bao)(bao)裝袋內充氣(qi)壓強大(da)(da)于包(bao)(bao)(bao)裝袋外(wai)大(da)(da)氣(qi)壓強，能(neng)有(you)效(xiao)地(di)防止食(shi)(shi)品受壓破碎變形(xing)并不影(ying)響包(bao)(bao)(bao)裝袋外(wai)觀及印刷裝潢。