真空充(chong)氣(qi)包裝的(de)主(zhu)要作用(yong)除(chu)真空包裝所具備(bei)的(de)除(chu)氧保(bao)(bao)質(zhi)功能(neng)外(wai),主(zhu)要 還有(you)抗壓、阻氣(qi)、保(bao)(bao)鮮等作用(yong),能(neng)更有(you)效地(di) 使(shi)食(shi)(shi)(shi)品(pin)長期保(bao)(bao)持(chi)原有(you)的(de)色(se)、香(xiang)、味、形(xing)(xing)及營養價值。另外(wai),有(you)許多食(shi)(shi)(shi)品(pin)不(bu)適宜采用(yong)真空包裝而必須采用(yong)真空充(chong)氣(qi)包裝。如松脆易碎食(shi)(shi)(shi)品(pin),易結塊食(shi)(shi)(shi)品(pin),易變形(xing)(xing)走油食(shi)(shi)(shi)品(pin),有(you)尖銳棱角或(huo)硬(ying)度較高會刺破包裝袋的(de)食(shi)(shi)(shi)品(pin)等。食(shi)(shi)(shi)品(pin)經真空充(chong)氣(qi)包裝后,包裝袋內充(chong)氣(qi)壓強大于包裝袋外(wai)大氣(qi)壓強,能(neng)有(you)效地(di)防止食(shi)(shi)(shi)品(pin)受壓破碎變形(xing)(xing)并不(bu)影(ying)響包裝袋外(wai)觀及 印刷裝潢。
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