真(zhen)(zhen)空(kong)充(chong)氣(qi)(qi)(qi)包(bao)裝(zhuang)(zhuang)的(de)主(zhu)要作用(yong)除真(zhen)(zhen)空(kong)包(bao)裝(zhuang)(zhuang)所具備的(de)除氧保質功能外(wai),主(zhu)要 還有(you)抗壓、阻氣(qi)(qi)(qi)、保鮮等作用(yong),能更有(you)效(xiao)地 使食(shi)(shi)品(pin)長期保持原有(you)的(de)色、香、味、形(xing)(xing)及營養價值。另外(wai),有(you)許多(duo)食(shi)(shi)品(pin)不適宜采用(yong)真(zhen)(zhen)空(kong)包(bao)裝(zhuang)(zhuang)而必須采用(yong)真(zhen)(zhen)空(kong)充(chong)氣(qi)(qi)(qi)包(bao)裝(zhuang)(zhuang)。如松脆易(yi)碎(sui)食(shi)(shi)品(pin),易(yi)結塊食(shi)(shi)品(pin),易(yi)變(bian)形(xing)(xing)走油食(shi)(shi)品(pin),有(you)尖銳棱(leng)角或硬度較高會(hui)刺破包(bao)裝(zhuang)(zhuang)袋的(de)食(shi)(shi)品(pin)等。食(shi)(shi)品(pin)經真(zhen)(zhen)空(kong)充(chong)氣(qi)(qi)(qi)包(bao)裝(zhuang)(zhuang)后,包(bao)裝(zhuang)(zhuang)袋內充(chong)氣(qi)(qi)(qi)壓強(qiang)大于(yu)包(bao)裝(zhuang)(zhuang)袋外(wai)大氣(qi)(qi)(qi)壓強(qiang),能有(you)效(xiao)地防(fang)止食(shi)(shi)品(pin)受壓破碎(sui)變(bian)形(xing)(xing)并不影響包(bao)裝(zhuang)(zhuang)袋外(wai)觀及 印刷裝(zhuang)(zhuang)潢。
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