食品變質(zhì)一般是因?yàn)槲⑸镌鲋?/div>
Food deterioration is generally due to microbial proliferation
所以要從控制微生物的角度來考慮
Therefore, it should be considered from the perspective of controlling microorganisms
1、降低產(chǎn)品中微生物數(shù)量，可在包裝前通過高溫、紫外燈手段實(shí)現(xiàn)；
1. Reducing the number of microorganisms in products can be realized by means of high temperature and UV lamp before packaging;
2、抑*微生物的繁殖，通過真空包裝可以抑*好氧微生物的生長(zhǎng)（鋁膜袋強(qiáng)度好于方便袋，但就對(duì)產(chǎn)品保質(zhì)來說沒有本質(zhì)區(qū)別）；通過低溫儲(chǔ)存運(yùn)輸亦可抑*微生物的繁殖。
2. Inhibit the propagation of * microorganisms. The growth of * aerobic microorganisms can be inhibited through vacuum packaging (the strength of aluminum film bag is better than that of convenience bag, but there is no essential difference in terms of product quality); Low temperature storage and transportation can also inhibit the reproduction of microorganisms.
此外降低產(chǎn)品的水活度、增加產(chǎn)品壓也可以達(dá)到延長(zhǎng)保質(zhì)期的目的，如用高鹽或高糖溶液浸泡等
In addition, reducing the water activity of the product and increasing the pressure of the product can also prolong the shelf life, such as soaking in high salt or high sugar solution
濟(jì)南復(fù)合塑料袋
方便袋包裝食品能久放嗎？這主要看是那種方便袋，如果是真空方便袋，那么就可以（一般使用真空包裝的食品大概可以存放1-3個(gè)月，具體時(shí)間得看是什么東西。如果是普通的方便袋，比如我們?nèi)粘Ｉ钪谐Ｓ玫谋承拇鼊t不行，為什么呢？
Can food packaged in convenience bags be kept for a long time? This mainly depends on the kind of convenience bag. If it is a vacuum convenience bag, it can be (generally, the food packaged in vacuum can be stored for about 1-3 months, depending on what it is. If it is an ordinary convenience bag, such as the vest bag commonly used in our daily life, it can't be. Why?
真空方便袋的主要作用是除氧，以有利于防止食品變質(zhì)，其原理也比較簡(jiǎn)單，因食品霉腐變質(zhì)主要由微生物的活動(dòng)造成，而大多數(shù)微生物（如霉菌和酵母菌）的生存是需要氧氣的，而真空包裝就是運(yùn)用這個(gè)原理，把包裝袋內(nèi)和食品細(xì)胞內(nèi)的氧氣抽掉，使微生物失去“生存的環(huán)境除氧除了抑*微生物的生長(zhǎng)和繁殖外，另一個(gè)重要功能是防止食品氧化，因油脂類食品中含有大量不飽和脂肪酸，受氧的作用而氧化，使食品變味、變質(zhì)。此外，氧化還使維生素A和維生素C損失，食品色素中的不穩(wěn)定物質(zhì)受氧的作用，使顏色變暗。所以，除氧能地防止食品變質(zhì)，保持其色、香、味及營(yíng)養(yǎng)價(jià)值。
The main function of vacuum convenience bag is to remove oxygen to help prevent food deterioration. Its principle is also relatively simple. Because food mildew and deterioration are mainly caused by the activities of microorganisms, and the survival of most microorganisms (such as molds and yeasts) requires oxygen. Vacuum packaging uses this principle to pump out the oxygen in the packaging bag and food cells, Loss of microorganisms "In addition to inhibiting the growth and reproduction of microorganisms, another important function of living environment deoxidation is to prevent food oxidation. Because fat foods contain a large amount of unsaturated fatty acids, they are oxidized by oxygen, which makes food taste and deteriorate. In addition, oxidation also causes the loss of vitamin A and vitamin C, and the unstable substances in food pigments are darkened by oxygen. Therefore, deoxidation can effectively prevent food deterioration and maintain its color Aroma, taste and nutritional value.
現(xiàn)在大家知道為什么真空方便袋包裝的食品能久放了吧。而普通方便袋是無法做到這點(diǎn)的，事實(shí)證明如果使用普通方便袋包裝食品不僅不能久放，反而會(huì)加速食品的變質(zhì)，所以在日常生活中建議大家不要用普通方便袋裝食品，一是并不能保鮮，二是不健康，要知道我們生活中常用的大多都是料制作，并不能衛(wèi)生。
Now we all know why the food packaged in vacuum convenience bags can be stored for a long time. Ordinary convenience bags can't do this. Facts have proved that if ordinary convenience bags are used to package food, they can't be put for a long time, but will accelerate the deterioration of food. Therefore, it is recommended not to use ordinary convenience bags in daily life. First, they can't keep fresh, and second, they are unhealthy. You should know that most of the foods commonly used in our life are made of materials and can't be hygienic.
按照標(biāo)準(zhǔn)，目前允許直接盛裝食品的方便袋都是PE材質(zhì)的，這樣的方便袋是可以盛裝食品放在冰箱里的。我們生活中在超，市購買的食品保鮮袋、保鮮膜、一次性手套以及標(biāo)有食品字樣的方便袋基本都屬于這一類
According to national standards, at present, the convenience bags that are allowed to directly contain food are made of PE. Such convenience bags can contain food in the refrigerator. In our life, the food fresh-keeping bags, plastic wrap, disposable gloves and convenience bags marked with food purchased in Chaoshi basically belong to this category
總的來說，只要是正規(guī)的食品包裝方便袋，都可以用來裝食物放冰箱里。
Generally speaking, as long as it is a regular food packaging convenience bag, it can be used to put food in the refrigerator.
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