真(zhen)空充(chong)氣(qi)(qi)(qi)(qi)(qi)包(bao)(bao)(bao)裝(zhuang)的(de)(de)主要作用(yong)除真(zhen)空包(bao)(bao)(bao)裝(zhuang)所具備的(de)(de)除氧保質(zhi)功能(neng)外(wai)，主要還(huan)有(you)(you)抗壓、阻氣(qi)(qi)(qi)(qi)(qi)、保鮮(xian)等作用(yong)，能(neng)更有(you)(you)效地使食(shi)(shi)品(pin)長期(qi)保持原有(you)(you)的(de)(de)色、香、味、形(xing)及(ji)營(ying)養(yang)價值。另外(wai)，有(you)(you)許多食(shi)(shi)品(pin)不(bu)適宜(yi)采用(yong)真(zhen)空包(bao)(bao)(bao)裝(zhuang)而必須采用(yong)真(zhen)空包(bao)(bao)(bao)裝(zhuang)機真(zhen)空充(chong)氣(qi)(qi)(qi)(qi)(qi)包(bao)(bao)(bao)裝(zhuang)。如松脆易碎食(shi)(shi)品(pin)，易結塊(kuai)食(shi)(shi)品(pin)，易變(bian)形(xing)走油(you)食(shi)(shi)品(pin)，有(you)(you)尖銳棱角或硬度較(jiao)高會刺破包(bao)(bao)(bao)裝(zhuang)袋(dai)的(de)(de)食(shi)(shi)品(pin)等。食(shi)(shi)品(pin)經(jing)真(zhen)空充(chong)氣(qi)(qi)(qi)(qi)(qi)包(bao)(bao)(bao)裝(zhuang)后，包(bao)(bao)(bao)裝(zhuang)袋(dai)內充(chong)氣(qi)(qi)(qi)(qi)(qi)壓強(qiang)大于包(bao)(bao)(bao)裝(zhuang)袋(dai)外(wai)大氣(qi)(qi)(qi)(qi)(qi)壓強(qiang)，能(neng)有(you)(you)效地防止食(shi)(shi)品(pin)受壓破碎變(bian)形(xing)并不(bu)影響包(bao)(bao)(bao)裝(zhuang)袋(dai)外(wai)觀及(ji)印刷裝(zhuang)潢。