【摘要】 本文为研究气调包装食品研制气体混合装置和塑料薄膜透气性测定仪。气体混合装置通过控制气体组分的分压使2或3种气体以一定的体积比例混合,并与普通真空包装机组成气调包装设备。透气性测定仪可测试塑料包装材料对各种气体的透气性,为气调包装合理选择包装材料。在即食海蜇皮气调包装试验中,将海蜇皮装入3种塑料薄膜制的包装袋并充入不同配气比例的CO₂与N₂组成混合气体,包装袋封口后贮藏于不同温度,得出影响保质期的因素。实验结果表明,在原料的原始菌数较低、CO₂与N₂的配气比例合理和包装材料透气性较低的情况下,即食海蜇皮气调包装可在常温贮藏下获得较长的保质期。更多还原

【Abstract】 In this paper a gas mixing device and an instrument for measuringthe permeability of gases in plastic film for modified atmospheric packaging foods wereengineered. The component gases were charged into the mixing device at a given ratioby controlling the partial pressures of two or three component gases. The device wasincorporated with a conventional vacuum packaging machine used for the modifiedatmospheric packaging. The gas permeability instrument was used to measure thepermeability of individual gas in plastic film so as to properly select packaging mate-rial to be used. In this experiment jelly fish was packaged in three different kinds of plastic filmpouches into which various proportions of CO₂/N₂ gas mixture were admitted. Thenthe pouches were sealed and stored under different temperatures in order to attain theoptimum factors influencing the keeping quality of the item. The results show that alonger shelf life of jelly fish packages in plastic film pouch of low permeability and inthe modified atmosphere even stored at ordinary temperature was obtained in case theinitial bacteria counts in the raw material was low and the proportion of CO₂/N₂ gasmixture was properly selected.更多还原