真(zhen)空(kong)充氣(qi)包(bao)(bao)裝(zhuang)的主(zhu)(zhu)要作用(yong)(yong)除(chu)真(zhen)空(kong)包(bao)(bao)裝(zhuang)所(suo)具(ju)備的除(chu)氧保質功能外(wai)(wai)，主(zhu)(zhu)要還(huan)有(you)抗壓、阻氣(qi)、保鮮等(deng)(deng)作用(yong)(yong)，能更(geng)有(you)效(xiao)地使食(shi)(shi)(shi)(shi)品(pin)長期(qi)保持(chi)原有(you)的色、香、味(wei)、形(xing)及營養價值。另(ling)外(wai)(wai)，有(you)許多(duo)食(shi)(shi)(shi)(shi)品(pin)不適宜采用(yong)(yong)真(zhen)空(kong)包(bao)(bao)裝(zhuang)而(er)必須采用(yong)(yong)真(zhen)空(kong)包(bao)(bao)裝(zhuang)機(ji)真(zhen)空(kong)充氣(qi)包(bao)(bao)裝(zhuang)。如(ru)松(song)脆易碎(sui)食(shi)(shi)(shi)(shi)品(pin)，易結塊食(shi)(shi)(shi)(shi)品(pin)，易變形(xing)走油食(shi)(shi)(shi)(shi)品(pin)，有(you)尖銳棱(leng)角(jiao)或硬度較(jiao)高會刺(ci)破包(bao)(bao)裝(zhuang)袋(dai)的食(shi)(shi)(shi)(shi)品(pin)等(deng)(deng)。食(shi)(shi)(shi)(shi)品(pin)經真(zhen)空(kong)充氣(qi)包(bao)(bao)裝(zhuang)后(hou)，包(bao)(bao)裝(zhuang)袋(dai)內充氣(qi)壓強大于包(bao)(bao)裝(zhuang)袋(dai)外(wai)(wai)大氣(qi)壓強，能有(you)效(xiao)地防止食(shi)(shi)(shi)(shi)品(pin)受壓破碎(sui)變形(xing)并(bing)不影響包(bao)(bao)裝(zhuang)袋(dai)外(wai)(wai)觀及印刷裝(zhuang)潢。