真(zhen)空(kong)(kong)充氣(qi)包(bao)裝(zhuang)的主要(yao)作用(yong)(yong)除真(zhen)空(kong)(kong)包(bao)裝(zhuang)所具(ju)備的除氧(yang)保質功(gong)能外(wai)(wai),主要(yao)還有(you)(you)抗(kang)壓、阻(zu)氣(qi)、保鮮等作用(yong)(yong),能更有(you)(you)效地使食(shi)品長期保持原有(you)(you)的色、香、味、形(xing)及(ji)營(ying)養價值(zhi)。另外(wai)(wai),有(you)(you)許多食(shi)品不(bu)(bu)適宜采用(yong)(yong)真(zhen)空(kong)(kong)包(bao)裝(zhuang)而必須采用(yong)(yong)真(zhen)空(kong)(kong)包(bao)裝(zhuang)機真(zhen)空(kong)(kong)充氣(qi)包(bao)裝(zhuang)。如松脆易(yi)(yi)碎食(shi)品,易(yi)(yi)結塊(kuai)食(shi)品,易(yi)(yi)變形(xing)走油(you)食(shi)品,有(you)(you)尖銳(rui)棱角或硬度較(jiao)高會刺破(po)包(bao)裝(zhuang)袋的食(shi)品等。食(shi)品經真(zhen)空(kong)(kong)充氣(qi)包(bao)裝(zhuang)后,包(bao)裝(zhuang)袋內充氣(qi)壓強大(da)(da)于包(bao)裝(zhuang)袋外(wai)(wai)大(da)(da)氣(qi)壓強,能有(you)(you)效地防止食(shi)品受壓破(po)碎變形(xing)并不(bu)(bu)影(ying)響包(bao)裝(zhuang)袋外(wai)(wai)觀(guan)及(ji)印刷裝(zhuang)潢。
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