真(zhen)(zhen)空充氣包裝(zhuang)(zhuang)的(de)主(zhu)要作用(yong)(yong)除真(zhen)(zhen)空包裝(zhuang)(zhuang)所(suo)具備的(de)除氧保質(zhi)功能外(wai)，主(zhu)要還有(you)(you)(you)抗壓、阻氣、保鮮(xian)等(deng)作用(yong)(yong)，能更有(you)(you)(you)效地(di)(di)使(shi)食(shi)品(pin)長期(qi)保持(chi)原有(you)(you)(you)的(de)色、香、味、形(xing)(xing)及(ji)(ji)營養(yang)價值(zhi)。另(ling)外(wai)，有(you)(you)(you)許多食(shi)品(pin)不(bu)適(shi)宜(yi)采用(yong)(yong)真(zhen)(zhen)空包裝(zhuang)(zhuang)而必須采用(yong)(yong)真(zhen)(zhen)空包裝(zhuang)(zhuang)機真(zhen)(zhen)空充氣包裝(zhuang)(zhuang)。如松脆易碎(sui)食(shi)品(pin)，易結塊食(shi)品(pin)，易變形(xing)(xing)走油食(shi)品(pin)，有(you)(you)(you)尖(jian)銳棱(leng)角(jiao)或硬度較高會刺破包裝(zhuang)(zhuang)袋的(de)食(shi)品(pin)等(deng)。食(shi)品(pin)經(jing)真(zhen)(zhen)空充氣包裝(zhuang)(zhuang)后，包裝(zhuang)(zhuang)袋內充氣壓強大于包裝(zhuang)(zhuang)袋外(wai)大氣壓強，能有(you)(you)(you)效地(di)(di)防止食(shi)品(pin)受壓破碎(sui)變形(xing)(xing)并不(bu)影響包裝(zhuang)(zhuang)袋外(wai)觀及(ji)(ji)印刷裝(zhuang)(zhuang)潢。