事实上，外卖打包袋也是包装各种商品的必要物品之一。它可以把产品包装提高到一个更高的水平。在通常的包装中也很常见。外卖打包袋保持食物新鲜的原理是什么呢？

In fact, takeout bags are also one of the necessary items for packaging various commodities. It can improve the product packaging to a higher level. It is also common in common packaging. What is the principle of keeping food fresh in takeout bags?

外卖打包袋具有生物透气功能，可调节袋内氮、二氧化碳、氧气的比例，平衡袋内气体，防止气体腐蚀，可抑果蔬收获后的呼吸作用，减少蒸腾作用，保持水分和营养，并具有多种养殖缓蚀效果，预防果蔬。而且它还具有防雾的功能，可以防止水蒸汽在袋内冷凝，避免果蔬与袋壁接触，从而防止腐烂的发生。

The takeout bag has the biological ventilation function, which can adjust the proportion of nitrogen, carbon dioxide and oxygen in the bag, balance the gas in the bag, prevent gas corrosion, inhibit the respiration of fruits and vegetables after harvest, reduce transpiration, maintain water and nutrition, and has a variety of aquaculture corrosion inhibition effects to prevent fruits and vegetables. It also has the function of anti-fog, which can prevent the condensation of water vapor in the bag, avoid the contact of fruits and vegetables with the bag wall, and prevent the occurrence of decay.

外卖打包袋须能够经受低温和高温，以便适合冷冻或烹饪食物。它还应具有较强的韧性和抗损坏能力，以免暴露食品，造成食品变质。它还具有很强的阻挡能力，灰尘、水分和空气的进入，并应具有很强的遮阳能力，以避免外界因素引起的食物变质。这样一来，我们就应该注意选择塑料袋，以免影响正常使用。

The takeout bag must be able to withstand low and high temperatures in order to be suitable for freezing or cooking food. It should also have strong toughness and damage resistance to avoid exposing food and causing food deterioration. It also has a strong blocking ability to prevent the entry of dust, water and air, and should have a strong shading ability to avoid food deterioration caused by external factors. In this way, we should pay attention to the selection of plastic bags to avoid affecting the normal use.

打包袋防止老化的正常措施

Normal measures to prevent aging of packaging bags

1、打包袋在自然环境下即在阳光直射的条件下，一周后其强度下降约25%，两周后会下降约40%，基本上已不能运用。也就是说外卖打包袋的贮存保管问题非常重要。

1. In the natural environment, that is, under direct sunlight, the intensity of the bag will decrease by about 25% after one week, and by about 40% after two weeks, which is basically unusable. That is to say, the storage and safekeeping of takeaway bags is very important.

2、打包袋在包装了物品之后放在露天环境受阳光直射，强度会急剧下降，所以要尽量避免阳光的直射。

2. After packaging, the packaging bag will be exposed to direct sunlight in the open air, and its intensity will drop sharply, so try to avoid direct sunlight.

3、再生料的过多参加也是促进外卖打包袋老化的原因之一。

3. Excessive participation of recycled materials is also one of the reasons that promote the aging of takeaway bags.

4、打包袋贮运过程中温度过高或遇到雨淋,都会导致其强度下降，然后达不到维护内装物品的质量要求，所以在平时应该避免高温和雨水的冲刷。

4. In the process of storage and transportation, the temperature of the packaging bag is too high or it is exposed to rain, which will cause its strength to drop, and then it can not meet the quality requirements for maintaining the contents. Therefore, it is necessary to avoid the scouring of high temperature and rain at ordinary times.

如今社会当中，很多陈列在柜台上面的打包袋大部分都是带有锯齿，其目的就是便于消费者扯开袋子，更方便的打开打包袋，但是你有没有想过，为什么会弄成锯齿状的效果，而不是平口的效果，打包袋为什么要制作成锯齿口。

In today's society, most of the packaging bags displayed on the counter are equipped with serrations. The purpose is to make it easier for consumers to tear open the bag and open the packaging bag. But have you ever thought about why the packaging bag is made into serrated effect rather than flat effect, and why the packaging bag is made into serrated mouth.

这个问题涉及到力学的使用，当物体受力的时候，受力会根据物体本身外形而改动，一般会在褶皱或者尖角处发作突变。因此打包袋厂把袋子边缘制作成锯齿状，保留这个锯齿状的效果，可以让消费者很轻松、方便的打开打包袋。更多相关内容就来我们网站https://www.sdynbz.com咨询吧！

This problem involves the use of mechanics. When an object is stressed, the stress will change according to the shape of the object itself, and it will break out at the fold or sharp corner. Therefore, the packaging bag factory makes the edge of the bag into a zigzag shape and retains the zigzag effect, which can make it easy and convenient for consumers to open the packaging bag. Come to our website for more relevant content https://www.sdynbz.com Ask!