真空(kong)充(chong)氣包(bao)裝(zhuang)的(de)主要(yao)作用(yong)除(chu)真空(kong)包(bao)裝(zhuang)所具備的(de)除(chu)氧保質功能(neng)外(wai),主要(yao)還有(you)(you)抗壓、阻氣、保鮮(xian)等(deng)作用(yong),能(neng)更有(you)(you)效地(di)使食(shi)(shi)品(pin)長期保持(chi)原有(you)(you)的(de)色、香、味、形及營(ying)養價值(zhi)。另外(wai),有(you)(you)許多食(shi)(shi)品(pin)不適宜采用(yong)真空(kong)包(bao)裝(zhuang)而必須采用(yong)真空(kong)包(bao)裝(zhuang)機真空(kong)充(chong)氣包(bao)裝(zhuang)。如松(song)脆易碎食(shi)(shi)品(pin),易結(jie)塊(kuai)食(shi)(shi)品(pin),易變形走油食(shi)(shi)品(pin),有(you)(you)尖銳(rui)棱角或硬(ying)度較高會刺破包(bao)裝(zhuang)袋的(de)食(shi)(shi)品(pin)等(deng)。食(shi)(shi)品(pin)經真空(kong)充(chong)氣包(bao)裝(zhuang)后,包(bao)裝(zhuang)袋內充(chong)氣壓強(qiang)(qiang)大(da)于包(bao)裝(zhuang)袋外(wai)大(da)氣壓強(qiang)(qiang),能(neng)有(you)(you)效地(di)防止食(shi)(shi)品(pin)受(shou)壓破碎變形并(bing)不影響包(bao)裝(zhuang)袋外(wai)觀及印(yin)刷裝(zhuang)潢。
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