真空(kong)充(chong)氣包(bao)裝(zhuang)(zhuang)的主(zhu)要(yao)作用(yong)(yong)除(chu)真空(kong)包(bao)裝(zhuang)(zhuang)所(suo)具備的除(chu)氧(yang)保質功能(neng)(neng)(neng)外(wai),主(zhu)要(yao) 還有抗壓、阻氣、保鮮等(deng)作用(yong)(yong),能(neng)(neng)(neng)更有效地(di) 使(shi)食(shi)(shi)品(pin)(pin)長期保持原有的色(se)、香(xiang)、味(wei)、形及營養(yang)價值。另外(wai),有許多(duo)食(shi)(shi)品(pin)(pin)不適宜采用(yong)(yong)真空(kong)包(bao)裝(zhuang)(zhuang)而(er)必須采用(yong)(yong)真空(kong)充(chong)氣包(bao)裝(zhuang)(zhuang)。如松脆易碎食(shi)(shi)品(pin)(pin),易結塊食(shi)(shi)品(pin)(pin),易變形走(zou)油食(shi)(shi)品(pin)(pin),有尖(jian)銳棱角或硬(ying)度(du)較高會刺破包(bao)裝(zhuang)(zhuang)袋(dai)的食(shi)(shi)品(pin)(pin)等(deng)。食(shi)(shi)品(pin)(pin)經(jing)真空(kong)充(chong)氣包(bao)裝(zhuang)(zhuang)后,包(bao)裝(zhuang)(zhuang)袋(dai)內(nei)充(chong)氣壓強(qiang)大(da)于包(bao)裝(zhuang)(zhuang)袋(dai)外(wai)大(da)氣壓強(qiang),能(neng)(neng)(neng)有效地(di)防止食(shi)(shi)品(pin)(pin)受壓破碎變形并不影響包(bao)裝(zhuang)(zhuang)袋(dai)外(wai)觀及 印刷裝(zhuang)(zhuang)潢。
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