真(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)(qi)包裝(zhuang)的主(zhu)(zhu)要作用(yong)除真(zhen)(zhen)空(kong)包裝(zhuang)所(suo)具備(bei)的除氧保(bao)(bao)質功能外，主(zhu)(zhu)要還有(you)抗壓、阻氣(qi)(qi)、保(bao)(bao)鮮等作用(yong)，能更有(you)效(xiao)(xiao)地(di)使食(shi)(shi)品(pin)(pin)長期保(bao)(bao)持原有(you)的色、香、味、形及營養價值。另外，有(you)許多食(shi)(shi)品(pin)(pin)不適宜采(cai)(cai)用(yong)真(zhen)(zhen)空(kong)包裝(zhuang)而必須采(cai)(cai)用(yong)真(zhen)(zhen)空(kong)包裝(zhuang)機(ji)真(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)(qi)包裝(zhuang)。如松脆易碎(sui)(sui)食(shi)(shi)品(pin)(pin)，易結塊食(shi)(shi)品(pin)(pin)，易變形走油食(shi)(shi)品(pin)(pin)，有(you)尖銳棱角(jiao)或硬度(du)較(jiao)高(gao)會刺(ci)破包裝(zhuang)袋(dai)(dai)的食(shi)(shi)品(pin)(pin)等。食(shi)(shi)品(pin)(pin)經(jing)真(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)(qi)包裝(zhuang)后，包裝(zhuang)袋(dai)(dai)內充(chong)(chong)氣(qi)(qi)壓強(qiang)大(da)于包裝(zhuang)袋(dai)(dai)外大(da)氣(qi)(qi)壓強(qiang)，能有(you)效(xiao)(xiao)地(di)防止食(shi)(shi)品(pin)(pin)受壓破碎(sui)(sui)變形并不影響包裝(zhuang)袋(dai)(dai)外觀及印刷裝(zhuang)潢。