真(zhen)空(kong)充(chong)氣(qi)包裝的主要(yao)作用除真(zhen)空(kong)包裝所(suo)具備的除氧保質功能(neng)外(wai),主要(yao) 還有(you)抗壓(ya)、阻(zu)氣(qi)、保鮮(xian)等(deng)作用,能(neng)更有(you)效地 使食(shi)(shi)(shi)(shi)品長期(qi)保持(chi)原有(you)的色(se)、香、味(wei)、形(xing)及(ji)營(ying)養(yang)價值。另外(wai),有(you)許多食(shi)(shi)(shi)(shi)品不(bu)適宜采用真(zhen)空(kong)包裝而必須采用真(zhen)空(kong)充(chong)氣(qi)包裝。如(ru)松(song)脆易(yi)碎(sui)食(shi)(shi)(shi)(shi)品,易(yi)結塊食(shi)(shi)(shi)(shi)品,易(yi)變形(xing)走油食(shi)(shi)(shi)(shi)品,有(you)尖銳棱角(jiao)或硬度較高會刺(ci)破包裝袋(dai)的食(shi)(shi)(shi)(shi)品等(deng)。食(shi)(shi)(shi)(shi)品經(jing)真(zhen)空(kong)充(chong)氣(qi)包裝后,包裝袋(dai)內充(chong)氣(qi)壓(ya)強大于包裝袋(dai)外(wai)大氣(qi)壓(ya)強,能(neng)有(you)效地防止食(shi)(shi)(shi)(shi)品受(shou)壓(ya)破碎(sui)變形(xing)并不(bu)影響包裝袋(dai)外(wai)觀及(ji) 印刷(shua)裝潢。
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