真(zhen)空充(chong)氣包(bao)(bao)裝(zhuang)的主(zhu)要作用(yong)(yong)除真(zhen)空包(bao)(bao)裝(zhuang)所(suo)具備的除氧保質(zhi)功(gong)能(neng)外,主(zhu)要 還有(you)抗壓(ya)、阻氣、保鮮等作用(yong)(yong),能(neng)更(geng)有(you)效地 使食(shi)品長(chang)期保持原有(you)的色、香、味、形及營(ying)養價值。另外,有(you)許多(duo)食(shi)品不(bu)適宜采用(yong)(yong)真(zhen)空包(bao)(bao)裝(zhuang)而必須(xu)采用(yong)(yong)真(zhen)空充(chong)氣包(bao)(bao)裝(zhuang)。如松脆易碎食(shi)品,易結塊食(shi)品,易變形走油食(shi)品,有(you)尖銳(rui)棱角或硬度較高會刺破包(bao)(bao)裝(zhuang)袋的食(shi)品等。食(shi)品經真(zhen)空充(chong)氣包(bao)(bao)裝(zhuang)后(hou),包(bao)(bao)裝(zhuang)袋內充(chong)氣壓(ya)強大于包(bao)(bao)裝(zhuang)袋外大氣壓(ya)強,能(neng)有(you)效地防止食(shi)品受(shou)壓(ya)破碎變形并不(bu)影響包(bao)(bao)裝(zhuang)袋外觀及 印(yin)刷裝(zhuang)潢(huang)。
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