Why can't beer be packed in plastic bottles like drinks? But keep using glass bottles?
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- Unsolveddestoon
- 2021-08-09 20:07
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- 1Flooranonymity
- 2021-08-12 11:47
1) Ordinary plastics, etc. will dissolve with alcohol, which is harmful to human health, so ordinary plastic bottles cannot be used;
2) The carbon dioxide dissolved in the beer brings a unique taste, but it is unstable. The carbon dioxide in the beer will be precipitated by collision, knock, shaking, heating, etc., so the container must be airtight and capable. Pressure resistance, air tightness and pressure resistance of ordinary plastic bottles cannot meet the requirements; ceramic containers can withstand a certain pressure, but there are micropores and fine lines, and the air tightness cannot meet the requirements;
3) Beer is weakly acidic. Common metals such as aluminum and iron cannot be used directly for beer unless they are specially treated.
4) The brewery generally uses hot water (about 70 degrees Celsius) spraying method to heat and sterilize the filled beer. At this time, a large amount of carbon dioxide is precipitated in the beer, and the container must be able to withstand high internal pressure. Generally, the plastic softens at this temperature. , Under the action of internal pressure, it will be blown up or broken like a balloon.
The glass bottle has the characteristics of not chemically reacting with the substances in the beer, good air tightness, higher pressure resistance, temperature resistance, etc., which is more suitable as a beer container, and the glass bottle has abundant raw material (quartz sand) resources, low price, and finalized specifications Glass bottles can be recycled and used after cleaning, and even broken glass can be used as raw materials to remelt glass bottles. Therefore, the economy is high.
However, glass bottles also have congenital defects such as heavy weight, intolerance to collisions, and injury from blown bottles. Therefore, now the cans (aluminum and iron are the main materials, and the inner layer is sprayed with protective coatings. For details, see Baidu Encyclopedia) the beer market is gradually taking up Increase. New materials such as PET bottles are also emerging.
2) The carbon dioxide dissolved in the beer brings a unique taste, but it is unstable. The carbon dioxide in the beer will be precipitated by collision, knock, shaking, heating, etc., so the container must be airtight and capable. Pressure resistance, air tightness and pressure resistance of ordinary plastic bottles cannot meet the requirements; ceramic containers can withstand a certain pressure, but there are micropores and fine lines, and the air tightness cannot meet the requirements;
3) Beer is weakly acidic. Common metals such as aluminum and iron cannot be used directly for beer unless they are specially treated.
4) The brewery generally uses hot water (about 70 degrees Celsius) spraying method to heat and sterilize the filled beer. At this time, a large amount of carbon dioxide is precipitated in the beer, and the container must be able to withstand high internal pressure. Generally, the plastic softens at this temperature. , Under the action of internal pressure, it will be blown up or broken like a balloon.
The glass bottle has the characteristics of not chemically reacting with the substances in the beer, good air tightness, higher pressure resistance, temperature resistance, etc., which is more suitable as a beer container, and the glass bottle has abundant raw material (quartz sand) resources, low price, and finalized specifications Glass bottles can be recycled and used after cleaning, and even broken glass can be used as raw materials to remelt glass bottles. Therefore, the economy is high.
However, glass bottles also have congenital defects such as heavy weight, intolerance to collisions, and injury from blown bottles. Therefore, now the cans (aluminum and iron are the main materials, and the inner layer is sprayed with protective coatings. For details, see Baidu Encyclopedia) the beer market is gradually taking up Increase. New materials such as PET bottles are also emerging.