Everyone knows that beer cannot be packed in plastic bo […]
Everyone knows that beer cannot be packed in plastic bottles, but do you know why?
Plastic is more permeable than glass (glass itself cannot permeate oxygen and carbon dioxide). In other words, beer (or other soft drinks) is easier to "dull" in a plastic bottle than in a glass bottle, and it tastes flat, because the carbon dioxide that makes the beer bubble is more likely to be lost. Another advantage of glass is that it has no taste and does not react chemically with the contents inside.
The plastic is full of chemical ingredients, and it is very likely to seep into your drink and ruin your beer. For example, in the manufacture of polyester plastic containers, antimony is often used as a catalyst, and the residual antimony may penetrate into the beverage.
At room temperature or below room temperature, the antimony content in the beverage is harmless to the human body. Once the temperature rises, the antimony content will also increase. Therefore, if the beverage is kept in an unsealed warehouse for several months in summer or other warm places, the antimony content in it will greatly exceed the standard.
Canned beer is safer
As for aluminum cans, like glass, aluminum is not very permeable, so it has become an excellent material for storing beer. Interestingly, the inside of the aluminum can is coated with a special polymer coating, which is specifically used to prevent the penetration of aluminum into the beverage and make the storage of the can safer; because the excessive aluminum content in the body will cause Alzheimer’s Disease and Parkinson’s syndrome.
In any case, aluminum cans can store beverages in full protection from light, and can protect beverages better than other types of packaging. In fact, we use glass, to be precise, colored glass to store beer, because it protects the beer from sunlight.
The practical plastic can also be made into the same color, but it may disrupt the existing order of the plastic recycling system. If a plastic beer bottle is made of amber like a glass bottle, an additional layer of coating is needed to protect the beer in the bottle. Compared with the transparent plastic bottle favored by the soft drink industry, it will be more difficult to recycle.
There is another problem with plastic bottle packaging: they cannot be pasteurized. After the beer is brewed, there is a very important process. After the packaging is completed, they will be sent to a machine and heated with boiling water jets to kill bacteria that may still survive in the beer.
This can ensure the quality and safety of beer and extend their shelf life. Glass bottles and aluminum cans are of course no problem at all, but plastic bottles are not good when they are blanched by Baidu's boiling water. Brown glass bottles PK green glass bottles In the early days, there were no special beer bottles, and more green wine bottles that were abundant in the world were used. Therefore, by the end of the 19th century, when there were special beer bottles, the tradition of green bottles was preserved. The appearance of the brown bottle continued until the 1930s. Some people have found that if the beer is packed in brown bottles, it can make the beer that has been left for a long time taste better, and there are more beer in brown bottles. Because of its darker color, brown bottles can prevent sunlight from irradiating the beer better than green bottles, and thus play a better role in the quality of beer. The brown bottle has become a symbol of high-quality beer. So you can see that most craft beer on the market is packed in brown beer bottles, while industrial beer is mostly packed in green bottles.
In order to ensure the quality of beer, in addition to the quality of the brewing equipment, the equipment is also the most important thing!