真空充(chong)氣包(bao)(bao)裝(zhuang)的(de)(de)主要(yao)作用(yong)(yong)除真空包(bao)(bao)裝(zhuang)所具備的(de)(de)除氧保(bao)質功能(neng)外(wai),主要(yao) 還有(you)抗(kang)壓、阻氣、保(bao)鮮等作用(yong)(yong),能(neng)更有(you)效地 使食(shi)(shi)品長期保(bao)持原有(you)的(de)(de)色、香、味、形(xing)及營養價(jia)值。另外(wai),有(you)許多食(shi)(shi)品不適宜采用(yong)(yong)真空包(bao)(bao)裝(zhuang)而必(bi)須采用(yong)(yong)真空充(chong)氣包(bao)(bao)裝(zhuang)。如松脆易(yi)(yi)碎食(shi)(shi)品,易(yi)(yi)結塊食(shi)(shi)品,易(yi)(yi)變形(xing)走油食(shi)(shi)品,有(you)尖(jian)銳棱(leng)角或硬度(du)較高(gao)會刺(ci)破(po)包(bao)(bao)裝(zhuang)袋的(de)(de)食(shi)(shi)品等。食(shi)(shi)品經真空充(chong)氣包(bao)(bao)裝(zhuang)后,包(bao)(bao)裝(zhuang)袋內充(chong)氣壓強大于(yu)包(bao)(bao)裝(zhuang)袋外(wai)大氣壓強,能(neng)有(you)效地防止食(shi)(shi)品受壓破(po)碎變形(xing)并不影響包(bao)(bao)裝(zhuang)袋外(wai)觀及 印刷裝(zhuang)潢。
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