真空(kong)包(bao)裝(zhuang)的一種(zhong)變種(zhong)是充氣(qi)包(bao)裝(zhuang)。充氣包(bao)裝的主要作用(yong)(yong)除(chu)真空包(bao)裝所具備的除(chu)氧保(bao)質(zhi)功能外,主要還(huan)有(you)(you)(you)抗壓(ya)、阻氣、保(bao)鮮(xian)等(deng)(deng)作用(yong)(yong),能更有(you)(you)(you)效 地使食(shi)品(pin)長(chang)期保(bao)持原有(you)(you)(you)的色、香、味、形及營(ying)養價值。另外,有(you)(you)(you)許(xu)多食(shi)品(pin)不(bu)宜采(cai)用(yong)(yong)真空包(bao)裝,而必須采(cai)用(yong)(yong)充氣包(bao)裝。如松脆易(yi)碎食(shi)品(pin)、易(yi)結塊(kuai)食(shi)品(pin)、易(yi)變形走油食(shi)品(pin)、有(you)(you)(you)尖銳棱角或硬度較高會刺破包(bao)裝袋的食(shi)品(pin)等(deng)(deng)。食(shi)品(pin)經食品真空(kong)包裝機抽氣(qi)包(bao)裝后,充(chong)入一(yi)些氣(qi)體,使包(bao)裝袋內充(chong)氣(qi)壓(ya)(ya)強(qiang)大于(yu)包(bao)裝袋外(wai)大氣(qi)壓(ya)(ya)強(qiang),能(neng)有效地(di)防止食品受壓(ya)(ya)破碎變(bian)形,并不影響包(bao)裝袋外(wai)觀及印刷裝潢。
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