真(zhen)空(kong)包(bao)裝的一(yi)種(zhong)(zhong)變種(zhong)(zhong)是充(chong)氣包(bao)裝。充氣包(bao)裝的主要(yao)作(zuo)用(yong)(yong)除真空包(bao)裝(zhuang)所具備(bei)的除氧保質功能(neng)外(wai),主要(yao)還有(you)(you)(you)抗壓、阻氣、保鮮等作(zuo)用(yong)(yong),能(neng)更有(you)(you)(you)效(xiao) 地(di)使(shi)食(shi)品(pin)(pin)長期保持原有(you)(you)(you)的色、香、味、形(xing)及營(ying)養價值。另外(wai),有(you)(you)(you)許(xu)多食(shi)品(pin)(pin)不(bu)宜采用(yong)(yong)真空包(bao)裝(zhuang),而必須采用(yong)(yong)充氣包(bao)裝(zhuang)。如松脆易(yi)碎食(shi)品(pin)(pin)、易(yi)結塊食(shi)品(pin)(pin)、易(yi)變形(xing)走油食(shi)品(pin)(pin)、有(you)(you)(you)尖銳棱角或硬度(du)較(jiao)高會(hui)刺破包(bao)裝(zhuang)袋的食(shi)品(pin)(pin)等。食(shi)品(pin)(pin)經(jing)食品真空包裝機抽氣(qi)包(bao)裝(zhuang)后,充入一些氣(qi)體,使包(bao)裝(zhuang)袋(dai)(dai)內充氣(qi)壓(ya)強大于(yu)包(bao)裝(zhuang)袋(dai)(dai)外大氣(qi)壓(ya)強,能(neng)有(you)效地防止食品(pin)受壓(ya)破碎變形,并不影響包(bao)裝(zhuang)袋(dai)(dai)外觀及印刷裝(zhuang)潢。
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