真空充(chong)(chong)氣包裝(zhuang)(zhuang)(zhuang)的(de)主要作(zuo)用(yong)除(chu)真空包裝(zhuang)(zhuang)(zhuang)所具備的(de)除(chu)氧保(bao)質功能外(wai)(wai),主要還有(you)(you)抗壓(ya)、阻(zu)氣、保(bao)鮮等作(zuo)用(yong),能更有(you)(you)效地(di)(di)使食(shi)品(pin)(pin)長期保(bao)持原有(you)(you)的(de)色、香、味(wei)、形(xing)(xing)及(ji)(ji)營(ying)養(yang)價值(zhi)。另外(wai)(wai),有(you)(you)許多食(shi)品(pin)(pin)不適宜采用(yong)真空包裝(zhuang)(zhuang)(zhuang)而必須采用(yong)真空包裝(zhuang)(zhuang)(zhuang)機真空充(chong)(chong)氣包裝(zhuang)(zhuang)(zhuang)。如(ru)松脆(cui)易(yi)碎(sui)食(shi)品(pin)(pin),易(yi)結塊食(shi)品(pin)(pin),易(yi)變形(xing)(xing)走油食(shi)品(pin)(pin),有(you)(you)尖銳棱角或硬度較高會刺破包裝(zhuang)(zhuang)(zhuang)袋的(de)食(shi)品(pin)(pin)等。食(shi)品(pin)(pin)經真空充(chong)(chong)氣包裝(zhuang)(zhuang)(zhuang)后,包裝(zhuang)(zhuang)(zhuang)袋內充(chong)(chong)氣壓(ya)強大于包裝(zhuang)(zhuang)(zhuang)袋外(wai)(wai)大氣壓(ya)強,能有(you)(you)效地(di)(di)防止食(shi)品(pin)(pin)受(shou)壓(ya)破碎(sui)變形(xing)(xing)并(bing)不影(ying)響包裝(zhuang)(zhuang)(zhuang)袋外(wai)(wai)觀及(ji)(ji)印刷(shua)裝(zhuang)(zhuang)(zhuang)潢。
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