濟南塑料袋：同樣是液體，為什么塑料袋裝水、裝啤酒不會滲出來，而裝油卻會？

來源：http://bjtdacyu.cn/ 日期：2024-08-28

方便塑料袋的發(fā)明，可以說大大方便了我們的生活。所以現(xiàn)在大到小到外面小攤買東西的時候，都會給我們用塑料袋裝著，就是為了提的時候方便。對于平常出門不帶包的人來說，真的是非常的方便，也非常的干凈衛(wèi)生。在有些時候，它不僅可以裝一些固態(tài)的東西，還可以裝液體。比如青島啤酒。

The invention of convenient plastic bags has greatly facilitated our lives. So now, from supermarkets to small stalls outside, they always put things in plastic bags for us to carry conveniently. For people who usually go out without carrying a bag, it is really convenient and very clean and hygienic. At times, it can hold not only solid objects but also liquids. For example, Tsingtao Beer.

其到了青島，每年的啤酒節(jié)的時候，很多人都會來青島參觀，很多的路邊攤上都是大桶的啤酒，對于購買的人，只需要用袋子裝下就可以，非常的方便，對于商家來說袋子的也更便宜，所以也節(jié)省了成本?？梢哉f塑料袋無論是裝水裝啤酒或者是裝固態(tài)的東西都是非常的，但是我們也發(fā)現(xiàn)塑料袋唯獨不能裝油，會發(fā)現(xiàn)滲漏的現(xiàn)象。所以很多人也是非常的不理解，為什么同樣是液體，無論是裝水或者是裝啤酒都不會滲透出來，但是裝油類卻會發(fā)生滲出來的現(xiàn)象

When they arrive in Qingdao, many people come to visit during the annual Beer Festival. Many roadside stalls are filled with large barrels of beer. For buyers, they only need to pack it in bags, which is very convenient. For businesses, the price of bags is also cheaper, so it also saves costs. It can be said that plastic bags are perfect for holding water, beer, or solid objects, but we have also found that plastic bags cannot hold oil and may experience leakage. So many people also don't understand why the same liquid, whether filled with water or beer, won't seep out, but when filled with oil, it will seep out

塑料袋其實也有各種質(zhì)量的，也分不同的。對于普通商家來說，當然是盡可能的便宜。而且生產(chǎn)塑料袋的廠家在生產(chǎn)過程中會加入一些填充的材料，例如石灰粉。我們知道這種材料其實是有輕微的腐蝕成分的，所以會導致塑料袋的分子之間存在一定的間隙。只是非常小，我們用肉眼是無法看到的。水和啤酒的密度，相對來說都比油大一些。

Plastic bags actually come in various qualities and prices. For ordinary merchants, of course, it is as cheap as possible. Moreover, manufacturers of plastic bags will add some filling materials, such as lime powder, during the production process. We know that this material actually has a slight corrosive component, which can cause certain gaps between the molecules of the plastic bag. It's just very small, we can't see it with the naked eye. The density of water and beer is relatively higher than that of oil.

也就是說它們的分子結(jié)構(gòu)在體積上要大于油。而且水分子結(jié)構(gòu)本身就大，再加上它有表面的張力，所以同樣一個塑料袋裝水或者啤酒的時候，都不會發(fā)生滲漏的現(xiàn)象，但是裝油的時候就會發(fā)生。

That is to say, their molecular structure is larger in volume than oil. Moreover, the structure of water molecules themselves is large, coupled with their surface tension, so when a plastic bag is filled with water or beer, there will be no leakage, but when it is filled with oil, it will occur.

當然也不全是油的原因，還有一方面就是塑料袋，因為塑料袋主要的生產(chǎn)成分是聚氯乙烯，和油一樣都屬于有機物。我們知道在物理學上有一種相溶的原理，也就是說油可以隨著時間的延長，而不斷的溶解塑料袋本身。但是水和塑料袋是完全不同的成分，自然也就不會發(fā)生溶解的現(xiàn)象。

Of course, it's not entirely due to oil, but also plastic bags, because the main production component of plastic bags is polyvinyl chloride, which, like oil, belongs to organic matter. We know that there is a principle of compatibility in physics, which means that oil can continuously dissolve the plastic bag itself over time. But water and plastic bags are completely different components, so naturally there will be no dissolution phenomenon.

在不斷的溶解過程中，塑料本身就會發(fā)生一些間隙，再就是因為油的分子結(jié)構(gòu)比袋子的間隙還要小一些，所以就會發(fā)生滲透的現(xiàn)象。所以油類裝進塑料袋的時候之所以會滲透出來，一方面是塑料袋本身的原因，另一方面就是有本身的原因。本身因為油類的結(jié)構(gòu)較小就會發(fā)生滲漏，再加上溶解的過程中就會導致縫隙越來越大，滲透越來越多。

During the continuous dissolution process, there will be some gaps in the plastic itself, and because the molecular structure of the oil is smaller than the gaps in the bag, permeation will occur. So the reason why oil seeps out when packed into plastic bags is partly due to the plastic bags themselves, and partly due to their own reasons. Due to the small structure of oil itself, leakage occurs, and the dissolution process leads to larger gaps and more permeation.

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