真空(kong)充氣(qi)(qi)包(bao)(bao)裝(zhuang)的(de)主(zhu)(zhu)要作(zuo)用(yong)除真空(kong)包(bao)(bao)裝(zhuang)所(suo)具備的(de)除氧保(bao)質功能外(wai),主(zhu)(zhu)要還(huan)有(you)(you)抗壓(ya)、阻(zu)氣(qi)(qi)、保(bao)鮮等作(zuo)用(yong),能更有(you)(you)效地使食(shi)品(pin)(pin)(pin)(pin)長期保(bao)持(chi)原有(you)(you)的(de)色、香、味、形(xing)及營養價值(zhi)。另外(wai),有(you)(you)許多食(shi)品(pin)(pin)(pin)(pin)不適(shi)宜(yi)采用(yong)真空(kong)包(bao)(bao)裝(zhuang)而必須采用(yong)真空(kong)包(bao)(bao)裝(zhuang)機(ji)真空(kong)充氣(qi)(qi)包(bao)(bao)裝(zhuang)。如(ru)松脆(cui)易(yi)碎食(shi)品(pin)(pin)(pin)(pin),易(yi)結塊食(shi)品(pin)(pin)(pin)(pin),易(yi)變形(xing)走油食(shi)品(pin)(pin)(pin)(pin),有(you)(you)尖(jian)銳(rui)棱角或硬度較(jiao)高會刺破包(bao)(bao)裝(zhuang)袋的(de)食(shi)品(pin)(pin)(pin)(pin)等。食(shi)品(pin)(pin)(pin)(pin)經(jing)真空(kong)充氣(qi)(qi)包(bao)(bao)裝(zhuang)后,包(bao)(bao)裝(zhuang)袋內(nei)充氣(qi)(qi)壓(ya)強大(da)于(yu)包(bao)(bao)裝(zhuang)袋外(wai)大(da)氣(qi)(qi)壓(ya)強,能有(you)(you)效地防止食(shi)品(pin)(pin)(pin)(pin)受壓(ya)破碎變形(xing)并不影響(xiang)包(bao)(bao)裝(zhuang)袋外(wai)觀(guan)及印刷裝(zhuang)潢。
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