真(zhen)空(kong)(kong)充(chong)(chong)氣(qi)(qi)包(bao)(bao)(bao)(bao)裝的(de)主要作用除(chu)真(zhen)空(kong)(kong)包(bao)(bao)(bao)(bao)裝所具備(bei)的(de)除(chu)氧保質功能外(wai)，主要 還(huan)有抗壓、阻氣(qi)(qi)、保鮮等作用，能更有效地 使食(shi)品(pin)長(chang)期保持原(yuan)有的(de)色、香、味、形(xing)及營養(yang)價值。另外(wai)，有許多食(shi)品(pin)不適宜(yi)采(cai)(cai)用真(zhen)空(kong)(kong)包(bao)(bao)(bao)(bao)裝而(er)必須(xu)采(cai)(cai)用真(zhen)空(kong)(kong)充(chong)(chong)氣(qi)(qi)包(bao)(bao)(bao)(bao)裝。如松(song)脆易(yi)碎食(shi)品(pin)，易(yi)結(jie)塊(kuai)食(shi)品(pin)，易(yi)變(bian)形(xing)走(zou)油(you)食(shi)品(pin)，有尖銳棱角或硬度較高會刺破包(bao)(bao)(bao)(bao)裝袋的(de)食(shi)品(pin)等。食(shi)品(pin)經(jing)真(zhen)空(kong)(kong)充(chong)(chong)氣(qi)(qi)包(bao)(bao)(bao)(bao)裝后，包(bao)(bao)(bao)(bao)裝袋內充(chong)(chong)氣(qi)(qi)壓強大于包(bao)(bao)(bao)(bao)裝袋外(wai)大氣(qi)(qi)壓強，能有效地防止食(shi)品(pin)受(shou)壓破碎變(bian)形(xing)并(bing)不影響包(bao)(bao)(bao)(bao)裝袋外(wai)觀(guan)及 印刷裝潢。