真(zhen)空充(chong)(chong)氣(qi)包(bao)(bao)裝(zhuang)的主(zhu)要作用(yong)除(chu)真(zhen)空包(bao)(bao)裝(zhuang)所(suo)具(ju)備的除(chu)氧保(bao)(bao)質(zhi)功能(neng)外(wai)，主(zhu)要還有抗壓(ya)、阻氣(qi)、保(bao)(bao)鮮等(deng)作用(yong)，能(neng)更有效地(di)使(shi)食(shi)(shi)(shi)(shi)(shi)品(pin)(pin)長(chang)期保(bao)(bao)持原有的色、香(xiang)、味、形及營養價值。另(ling)外(wai)，有許(xu)多食(shi)(shi)(shi)(shi)(shi)品(pin)(pin)不適宜采用(yong)真(zhen)空包(bao)(bao)裝(zhuang)而(er)必須(xu)采用(yong)真(zhen)空包(bao)(bao)裝(zhuang)機真(zhen)空充(chong)(chong)氣(qi)包(bao)(bao)裝(zhuang)。如(ru)松脆易碎(sui)食(shi)(shi)(shi)(shi)(shi)品(pin)(pin)，易結(jie)塊食(shi)(shi)(shi)(shi)(shi)品(pin)(pin)，易變(bian)形走油食(shi)(shi)(shi)(shi)(shi)品(pin)(pin)，有尖(jian)銳棱角或硬度較高會刺破(po)包(bao)(bao)裝(zhuang)袋(dai)的食(shi)(shi)(shi)(shi)(shi)品(pin)(pin)等(deng)。食(shi)(shi)(shi)(shi)(shi)品(pin)(pin)經真(zhen)空充(chong)(chong)氣(qi)包(bao)(bao)裝(zhuang)后，包(bao)(bao)裝(zhuang)袋(dai)內充(chong)(chong)氣(qi)壓(ya)強大于包(bao)(bao)裝(zhuang)袋(dai)外(wai)大氣(qi)壓(ya)強，能(neng)有效地(di)防止食(shi)(shi)(shi)(shi)(shi)品(pin)(pin)受壓(ya)破(po)碎(sui)變(bian)形并不影響包(bao)(bao)裝(zhuang)袋(dai)外(wai)觀及印刷裝(zhuang)潢。